JP3110998B2 - Joint of flat circuit body and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint portion of a flat circuit body for connecting a plurality of electric wires to each other and distributing a single electric wire to a plurality of electric wires, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, joint connectors have been used as means for branch connection of electric wires. The joint connector sets a bus bar having a large number of branch terminals in a connector housing and interconnects the wire-side terminals set in the housing or the mating connector with the bus bar, thereby performing a branch connection of electric wires. It is.

FIG. 11 shows a joint connector described in Japanese Patent Application Laid-Open No. 5-326,088. In this joint connector 1, a bus bar 3 integrally having a plurality of male terminals 5 is housed and fixed in a box-shaped connector housing 2 made of a resin molded product. The joint connector 1 branches and connects the electric wires connected to the female terminals by being fitted with a mating connector having the female terminals.

FIG. 12 shows an example of a combination of a joint connector and a mating connector. The joint connector 11 in which the bus bar 3 is accommodated in the housing 12 is mated with the mating connector 15 in which the female terminal 16 is accommodated in the housing 14, thereby branching and connecting the electric wire 17 connected to each female terminal 16.

FIG. 13 shows a joint connector 6 described in Japanese Patent Application Laid-Open No. 6-38181. This joint connector 6 is for performing centralized earthing,
From the connector housing 8 in which a plurality of male terminals are accommodated,
The electric wire 7 at the end of the male terminal is pulled out and connected to one terminal 9, and this terminal 9 is fixed to the ground plane 13 with a screw 10. The connector housing 8 has a connector 19 at the end of the ground wire drawn from the wire harness 18.
a and 19b are fitted, and a plurality of electric wires are grounded via the joint connector 6.

Further, as an example in which electric wires are branched and connected without using a joint connector, a structure shown in FIG. 14 is known (Japanese Utility Model Laid-Open No. 57-107225). The joint portion 20 is connected to the branch wire bundle 2 from the main wire bundle 21.
2 is branched and drawn out, and the branched portion 23 is protected by being sandwiched between soft resin sheets 24 and 25.

[0007]

By the way, FIGS.
As shown in 2, 13, joint connectors 1, 6, 1
In the case where the branch circuit is formed by using 1, it is necessary to use the connector housings 2, 8, and 12 (in the illustrated example, in addition to the own housing, the mating housing is also required). Many, cost prone. In addition, in the case of the connector type, the attachment site is limited, and the extra length of the electric wire is likely to be generated accordingly.

Further, in the example shown in FIG. 14, since the branch portion 23 is merely sandwiched between the two soft resin sheets 24 and 25, no connector housing is required. However, since the wire bundle is directly branched, There is a problem that assembly is very troublesome.

The present invention has been made in consideration of the above circumstances, and has a small number of parts, a simple structure, a good assembling property, and no limitation on a mounting place, and a flat wire which can eliminate the generation of a useless extra wire length. An object of the present invention is to provide a joint portion of a circuit body and a method of manufacturing the same.

[0010]

According to the first aspect of the present invention, the joint portion of the flat circuit body includes a wire-side terminal provided at an end of a plurality of wires, and a plurality of branch terminals fitted to each wire-side terminal. And two insulating films that are adhered to each other and sandwich the terminal of the electric wire and the bus bar, including both terminals, between them.

In this structure, the bus bar, the electric wire side terminal and the
Since the joint portion of the electric wire is constituted by a single insulating film, a box-shaped housing such as a joint connector is not required, and a mating connector is not required. Also, 2
Since the electrical connection part (the fitting part of the busbar branch terminal and the wire side terminal and its surroundings) is covered with a piece of insulating film, it is less susceptible to the effects of sulfur dioxide gas, ammonia gas, etc. contained in water or air, and Corrosion is improved. In addition, if a blank portion of the insulating film is used, it can be clipped or screwed, and can be taped to a wall or the like because of its flat shape.

According to a second aspect of the present invention, there is provided the method of manufacturing a joint portion of a flat circuit body according to the first aspect, wherein a plurality of wire-side terminals provided at the ends of the plurality of wires are connected to the bus bar. Each of the branch terminals is fitted, and the terminal of the electric wire and the bus bar including the two terminals are sandwiched between two insulating films, and the two insulating films are adhered to each other in this state.

According to this manufacturing method, after the electric wire side terminal and the branch terminal of the bus bar are fitted, the portion is simply sandwiched by the insulating film, so that the manufacturing can be easily performed.

According to a third aspect of the present invention, there is provided a method for manufacturing a joint portion of a flat circuit body according to the second aspect, wherein an adhesive is applied to at least one of the two insulating films on the side to be bonded. While applying, a large number of vacuum holes were made in one of the two insulating films, and the end of the electric wire including both terminals and the bus bar were sandwiched between the two insulating films.
After laminating the two insulating films, air between the two insulating films is sucked from the vacuum evacuation hole, whereby the two insulating films are brought into close contact with each other and adhered with the adhesive.

In this manufacturing method, the insulating film is tightly joined by vacuum forming, so that the degree of adhesion of the insulating film is increased.

According to a fourth aspect of the present invention, there is provided the joint portion of the flat circuit body according to the first aspect, wherein a mounting hole for a mounting target portion is provided in a blank portion of the insulating film.

In this structure, a screw is passed through the mounting hole,
By engaging a clip or the like, it can be attached to a vehicle body or the like.

The structure according to the fifth aspect of the present invention is the first or fourth aspect.
The joint portion of the flat circuit body according to claim 2, wherein
It is characterized in that one insulating film is formed by bending one insulating film.

In this structure, since one insulating film is bent into two, and the electrical connection portion is sandwiched between the two, the number of insulating films to be prepared is reduced, and the positioning when the insulating films are overlapped becomes easy. .

According to a sixth aspect of the present invention, there is provided the joint portion of the flat circuit body according to the fifth aspect, wherein the flat portion is attached to a bending line of the two insulating films by bending the one insulating film. A tongue piece having a mounting hole for the target portion was continuously provided, and the tongue piece was cut into one insulating film side, and extended to the other insulating film side by cutting and raising an inner piece of the cut. It is characterized by the following.

In this structure, the tongue piece having the mounting hole is formed in a shape protruding from the outer edge of the insulating film.

According to a seventh aspect of the present invention, there is provided the joint portion of the flat circuit body according to the sixth aspect, wherein an adhesive is applied to a surface which becomes inside when the one insulating film is bent. Features.

In this structure, since the applied adhesive appears on the back surface of the tongue, the tongue can be attached to the other side by using the adhesive.

In the manufacturing method according to the present invention, a folding line is set on one insulating film having an adhesive applied to one side thereof, and one side of the folding line is provided adjacent to the folding line. Make a continuous cut with the starting point and the end point at two points spaced apart from each other, and make a mounting hole for the mounting target part in the inner piece of this cut, while the wire side terminal provided at the end of the plurality of wires A plurality of branch terminals connected to the bus bar are fitted respectively, and the terminal of the electric wire and the bus bar including the both terminals are arranged on one side of the bending line on the surface of the insulating film on the side where the adhesive is applied, and in that state. Bend the insulating film at the bending line, sandwich the ends of the wires including both terminals and the bus bar between the two insulating films by bending, and adhere both insulating films with adhesive Engaged, at the same time of the folding, characterized in that the left as tongues for mounting without bending the inner piece of the cut.

In this manufacturing method, since the adhesive appears on the back side of the tongue piece left unfolded, the tongue piece is stuck to the other side with the adhesive and temporarily fixed. Can be fastened, making work easier.

According to a ninth aspect of the present invention, there is provided the joint portion of the flat circuit body according to the first aspect, wherein the bus bar includes a bent piece provided on one of the insulating films and at least one of the bent pieces. And a conductor layer adhered to the surface by a thin film forming process.

In this structure, the bus bar can be formed integrally with the insulating film.

According to a tenth aspect of the present invention, there is provided the joint portion of the flat circuit body according to the ninth aspect, wherein metal plating is applied as the thin film forming process. In this structure, since the conductor layer is formed by metal plating, the bus bar can be easily formed integrally with the insulating film.

According to an eleventh aspect of the present invention, there is provided the joint portion of the flat circuit body according to the tenth aspect, wherein the two insulating films are formed by bending one insulating film. And

In this structure, since one insulating film is bent into two and the electric connection portion is interposed therebetween, the number of insulating films to be prepared is reduced, and the positioning when the insulating films are superposed becomes easy. .

According to a twelfth aspect of the present invention, there is provided a flat circuit joint according to the tenth or eleventh aspect, wherein the bus bar is provided with a ground terminal.

In this structure, the bus bar can be grounded by grounding the ground terminal, and the wire side terminal can be grounded.

According to a thirteenth aspect of the present invention, a bent piece is provided on one of the insulating films, a conductor layer is formed on the surface of the bent piece by a thin film forming process, and the bent piece having the conductor layer is used. Constituting a bus bar having a plurality of branch terminals, fitting each branch terminal of the bus bar constituted by the bent pieces with a wire side terminal provided at the end of the plurality of wires, including the two terminals The terminal of the electric wire and the bus bar are disposed on one surface of the one insulating film, and the other insulating film is covered thereon, and the terminal and the bus bar of the electric wire including the two terminals are sandwiched between the two insulating films. It is characterized in that the film is brought into close contact and adhered.

According to this method, the joint of claim 9 can be manufactured.

According to a fourteenth aspect of the present invention, there is provided a manufacturing method of the first aspect.
4. The method for manufacturing a joint portion of a flat circuit body according to claim 3, wherein the one insulating film and the other insulating film are configured by bending one insulating film. According to this method, one insulating film is bent into two to form one and the other insulating film.

[0036]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show a first embodiment of the present invention.

The joint 30 of this flat circuit body
As shown in FIG. 1, the wire-side terminals 37 provided at the ends of the plurality of wires 35 are respectively fitted to the branch terminals 33 continuously provided on the bus bar 31, and thereafter, both terminals 33,
37, including the end of the electric wire 35 and the bus bar 31
The two insulating films 41 and 42 are sandwiched between the two insulating films 41 and 42, and in this state, the two insulating films 41 and 42 are adhered to each other.

As shown in FIG. 2, the completed joint portion 30 accommodates an electric joint (a fitting portion between the bus bar 31 and the electric wire side terminal 37) in the central portion 44 of the inverted T-shaped insulating films 41 and 42. The electric wire 35 is drawn out from both sleeve portions 45 and 46 to the outside.

Incidentally, this joint part 30 is usually
It is configured as part of a large flat circuit. Therefore, the insulating films 41 and 42 are also considerably larger than those shown in the figure, and sandwich the electric wire 35 in a wider range.

As a method of sandwiching the bus bar 31 and the like between the insulating films 41 and 42, only one of the insulating films 41 is used.
The other insulating film 42 can be superimposed and attached, but a method of tightly joining by vacuum forming can also be used.

When performing vacuum forming, an adhesive is applied to at least one of the two insulating films 41 and 42 on the side to be bonded. Also, two insulating films 41, 4
A number of vacuum holes are drilled in one of the two. Then, with the terminal of the electric wire 35 including the terminals 33 and 37 and the bus bar 31 interposed therebetween, the two insulating films 41, 4
After superimposing 2, the air between the two insulating films 41 and 42 is sucked from the vacuum evacuation hole, thereby bringing the two insulating films 41 and 42 into close contact with each other and bonding them with an adhesive.
In the case of bonding by this method, the insulating films 41, 4
2, and the protection performance against the electrical connection is increased.

The joint part 30 thus obtained is
Bus bar 31, electric wire side terminal 37, and two insulating films 4
Since it is composed of 1, 42, there is no need for a box-shaped housing such as a joint connector. Therefore, the number of parts is reduced and the structure is simplified. In addition, since there is no bulky component such as the connector housing, it is small and flat, and can be easily attached to the vehicle with tapes, screws, clips, or the like without a bracket or the like. Therefore, the attachment site is not limited, and the problem of the extra length of the electric wire can be solved. In addition, since the electrical connection portion is covered with the two insulating films 41 and 42,
It is less susceptible to the effects of sulfurous acid gas, ammonia gas and the like contained in water and air, and the corrosion resistance is improved. Also, at the time of manufacture, the electrical connection portions are formed of insulating films 41, 42.
It is easy to assemble because it is only sandwiched between.

FIG. 3 shows a second embodiment of the present invention.

In the joint section 50 of this embodiment, the above-mentioned 2
One insulating film 41, 42 becomes one insulating film 5
It is configured by folding 1 into two. 52 is
This is the bending line at that time. Also, the insulating film 41,
A circular mounting hole 55 is formed in a blank portion of 42 (a portion not directly related to a portion protecting the wire connection portion).

In the case of the joint portion 50, since one insulating film 51 is bent into two to sandwich the electrical connection portion, the number of insulating films to be prepared is reduced, and handling during assembly becomes easy. In addition, when compared with the case where two different insulating films 41 and 42 are overlapped as in the first embodiment, the two insulating films 41 and 42 are simply folded at the folding line 52, so that the positioning of the insulating films 41 and 42 can be performed. Less trouble and easier assembly. The joint portion 50 can be attached to a vehicle body or the like by passing a screw 57 through a mounting hole 55 provided in a blank portion of the insulating films 41 and 42 or engaging a clip (not shown).

FIGS. 4 and 5 show a third embodiment of the present invention.

In the joint portion 60 of this embodiment, as shown in FIG. 5, the bending lines 5 of the two insulating films 41 and 42 formed by bending one insulating film 51 are formed.
2, a tongue piece 63 having a mounting hole 55 is continuously provided. The tongue piece 63 is extended toward the other insulating film 42 by making a cut 62 on one of the insulating films 41 and cutting and raising an inner piece of the cut 62. An adhesive is applied on the inner surface side of the insulating film 51, and the adhesive is exposed on the back side of the tongue piece 63.

To obtain the joint portion 60, first,
As shown in FIG. 4, one insulating film 51 having one side coated with an adhesive is prepared, and a bending line 52 is set at a predetermined position substantially at the center of the insulating film 51.

Next, adjacent to the bending line 52, one side of the bending line 52 (the lower side of the bending line 52 in the figure)
And two points 62A and 62 at intervals on the bending line 52.
Continuous semicircular cut 6 with B as the starting point and the end point
Insert 2. At the same time, a mounting hole 55 is made in the inner piece of the cut 62.

Then, the wire-side terminals 37 provided at the ends of the plurality of wires 35 are fitted to the plurality of branch terminals 33 connected to the bus bar 31, respectively. The terminal and the bus bar 31 are arranged on one side of the bending line 52 on the surface of the insulating film 51 on the side where the adhesive is applied.

Next, in this state, as shown in FIG. 5A, the insulating film 51 is bent at the position of the bending line 52, and the two insulating films 41 are formed by bending.
The terminal of the electric wire 35 including the both terminals 33 and 37 and the bus bar 31 are sandwiched between 42, and both insulating films 41 and
42 is tightly joined with an adhesive. At the same time, at the time of the bending, the inner piece of the notch 62 is left as a tongue piece 63 for mounting without bending. Thereby, the joint part 60 of FIG. 5B is completed.

In this joint portion 60, an adhesive appears on the back side of the tongue piece 63 left without being bent, and the screw 57 is screwed into the mounting hole 55 while being temporarily fixed to the other side with the adhesive.
Etc., and the work can be easily performed. Further, since the tongue piece 63 having the mounting hole 55 is formed so as to protrude from the outer edges of the insulating films 41 and 42, if there is space for the tongue piece 63, the joint portion 60 can be securely fixed even in a narrow place. Can be. Also, the tongue piece 63
Can be bent freely, so the degree of freedom of installation is increased.

FIGS. 6 and 7 show a fourth embodiment of the present invention.

In the joint 70 of this embodiment, the bus bar 77 is attached to the bent piece 72 provided on one of the insulating films 41 and at least one surface of the bent piece 72 by electrolytic plating (thin film forming processing). And a conductive layer 75.

To obtain the joint 70, first,
As shown in FIG. 6, the folded piece 7 is attached to one of the two insulating films 41 to be bonded.
2 is provided. The bent piece 72 has a busbar-shaped portion (hatched portion) 73 at the tip.

Next, a conductive material 74 in the form of a paste is printed or applied on one surface (or on both surfaces) of the tip portion (portion in the form of a bus bar) 73 of the bent piece 72, and the paste is formed by electrolytic plating. Forming a conductor layer 75 on the portion,
The portion where the conductor layer 75 is formed is referred to as a bus bar 77.

Next, the bent piece 72 of the insulating film 41
Is properly bent, and each branch terminal 3 of the bus bar 77 is bent.
3 and the wire side terminal 37 are fitted. At this time, the bus bar 77 and the wire-side terminal 37 can be positioned at appropriate positions only by appropriately bending the bent piece 72 without using any extra holding means or the like.

Then, as shown in FIG. 7A, the terminal of the electric wire 35 and the bus bar 77 including both terminals 33 and 37 are included.
Is disposed on one surface of the insulating film 41, and the other insulating film 42 is covered thereover.
1, 42 are closely bonded.

As described above, the method of the close bonding may be simple bonding or vacuum forming.

In the case of the joint 70, since the bus bar 77 is formed integrally with the insulating film 41, the number of parts is reduced, and the assembling property is improved.

FIGS. 8 and 9 show a fifth embodiment of the present invention.

In the joint portion 80 of this embodiment, similarly to the above-described embodiment, the bus bar 87 has a bent piece 82 provided on one of the insulating films 41 and electrolytic plating (thin film forming processing) on at least one surface of the bent piece 82. ) And the conductor layer 85 adhered by the above method. The bus bar 87 is formed with a branch terminal 33 and a ground terminal 86.

In order to obtain the joint 80, first,
As shown in FIG. 9, a bent piece 82 is provided on one of the two insulating films 41 and 42 to be bonded. The bent piece 82 has a busbar-shaped portion (hatched portion) 83 at the tip. Also, 2
Mounting holes 88, 88 corresponding to the holes 89a of the ground terminal 86 are formed in the insulating films 41, 42, respectively.

Next, a paste-like conductive material (paste-like conductive composite material) is printed on one side (or both sides) of the tip portion (bus-bar-shaped portion) 83 of the bent piece 82. Alternatively, the conductor layer 85 is formed on the same portion by coating and electrolytic plating, and the portion where the conductor layer 85 is formed is used as a bus bar 87.

Next, while appropriately bending the bent piece 82 of the insulating film 41, each branch terminal 33 of the bus bar 87 is
And the electric wire side terminal 37 are fitted. At this time, the bus bar 87 and the electric wire side terminal 37 can be positioned at appropriate positions by merely bending the bent pieces 82 appropriately without using any extra holding means and the like.
And the hole 89a of the ground terminal 86 can be positioned.

When the terminal of the electric wire 35 and the bus bar 87 including both the terminals 33 and 37 are arranged on one surface of the insulating film 41, the other insulating film 42
And the two insulating films 41 and 42 are tightly joined.

As described above, this contact bonding method
It may be simply pasted, pasted by a hot roll,
It may be performed by vacuum hot pressing or vacuum forming.

The electric wire 35 can be grounded by fixing it to the vehicle body with bolts 89 inserted through the holes 89a of the grounding terminal 86 and the mounting holes 88 of the insulating films 41 and 42.

In the case of the joint portion 80, since the bus bar 87 is formed integrally with the insulating films 41 and 42, the number of parts is reduced, the length of the electric wire is reduced, the size and weight are reduced, and the assembling property is improved. I do.

FIG. 10 shows a fourth embodiment of the present invention.

In the joint section 90 of this embodiment, the two insulating films 41 and 42 are replaced by one insulating film 93.
It is configured by folding it into two. 93 is a bending line at that time. In addition, mounting holes 88, 88 communicating with each other in a bent state are formed in the insulating films 41, 42.

In the case of this joint portion 90, since one insulating film 91 is bent into two to sandwich the electrical connection portion, the number of insulating films to be prepared is reduced, and handling during assembly becomes easy. Further, since the film is simply folded in two at the bending line, the trouble of positioning the insulating films 41 and 42 is reduced, and the assembling property is facilitated.

[0074]

As described above, according to the first aspect of the present invention, the joint portion of the electric wire is constituted by the bus bar, the electric wire side terminal, and the two insulating films. Does not require any housing,
No mating connector is required. Therefore, the number of parts is reduced and the structure is simplified, so that the cost can be reduced and the weight can be reduced. In addition, since a hard and bulky component such as a connector housing is not required, the size and flatness can be reduced, and the device can be easily attached to a vehicle or the like without a bracket or the like. Therefore, the attachment site is not limited, and the problem of the extra length of the electric wire can be solved.

Further, since the electric connection portion (the fitting portion between the branch terminal of the bus bar and the electric wire side terminal and its peripheral portion) is covered with the two insulating films, it is possible to prevent sulfur dioxide gas, ammonia gas and the like contained in water or air from being present. It is less susceptible to effects and corrosion resistance is improved. In addition, as for the configuration, since the electrical connection portion is merely sandwiched between the insulating films, the assembly can be easily performed. Also, if you use the margins of the insulating film,
It can be clipped or screwed, and because it is flat, it can be taped to a wall or the like, and can be easily fixed.

According to the second aspect of the invention, after the electric wire side terminal and the branch terminal of the bus bar are fitted, the structure of the first aspect can be easily manufactured only by sandwiching the portion with the insulating film. .

According to the third aspect of the present invention, at this time, the insulating film is tightly joined by vacuum forming, so that the degree of adhesion of the insulating film can be increased and the protection performance for the electric connection portion can be improved.

According to the fourth aspect of the present invention, since the mounting hole is provided in the blank portion of the insulating film, it can be mounted on a vehicle body or the like by passing a screw through the mounting hole or engaging a clip. it can.

According to the fifth aspect of the present invention, since one insulating film is bent into two to sandwich the electrical connection portion, the number of insulating films to be prepared is reduced, and handling at the time of assembling becomes easy. Further, as compared with the case where two different insulating films are superimposed, the trouble of positioning the insulating film is reduced, and the assembling can be performed easily.

According to the sixth aspect of the present invention, the tongue having the mounting hole can be formed so as to protrude from the outer edge of the insulating film.
Therefore, if there is a space for the tongue piece, the joint can be securely fixed even in a narrow place. Also, since only the tongue piece can be freely bent, the degree of freedom in mounting is increased.

According to the invention of claim 7, the applied adhesive appears on the back surface of the tongue piece. Therefore, at the time of mounting, the fastener can be permanently fastened to the mounting hole through a screw or the like while being temporarily fixed to the other side with the adhesive, thereby facilitating the mounting work to the vehicle body or the like.

According to the eighth aspect of the present invention, since the adhesive appears on the back side of the tongue piece left without being bent, the fastener is temporarily fastened to the mating side with the adhesive and the screw is passed through the mounting hole for final fastening. And work becomes easier. Further, only by using an insulating film coated with an adhesive on one side, both the adhesion of the two insulating films and the formation of the adhesive on the back surface of the tongue piece can be realized.

According to the ninth aspect of the present invention, the bus bar can be formed integrally with the insulating film. Therefore, the number of parts is reduced, and the assemblability is improved. Also, the bus bar and the wire-side terminal can be positioned at appropriate positions only by fitting the branch terminal of the bus bar with the wire-side terminal in a state where the bent piece is bent, so that no extra holding means or positioning means is used. Can be assembled.

According to the tenth aspect of the present invention, since the conductor layer is formed by metal plating, the bus bar can be easily formed integrally with the insulating film, thereby facilitating the manufacture.

According to the eleventh aspect of the present invention, since one insulating film is bent into two so as to sandwich the electrical connection portion, the number of insulating films to be prepared is reduced, and handling during assembly becomes easy. Further, as compared with the case where two different insulating films are superimposed, the trouble of positioning the insulating film is reduced, and the assembling becomes easier.

According to the twelfth aspect of the invention, the electric wire can be grounded by connecting the ground terminal to the vehicle body.

According to the thirteenth aspect, the joint part according to the ninth aspect can be manufactured.

According to the fourteenth aspect of the invention, as compared with the case where two different insulating films are superposed, the trouble of positioning the insulating film is reduced, and the assembling becomes easier.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a manufacturing process according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a completed state of the first embodiment of the present invention.

FIGS. 3A and 3B are perspective views showing a second embodiment of the present invention, in which FIG. 3A shows a state in the course of manufacture, and FIG. 3B shows a completed state.

FIG. 4 is a perspective view showing a state in the course of manufacture according to a third embodiment of the present invention.

5A and 5B are perspective views showing a third embodiment of the present invention, wherein FIG. 5A is a view showing a state in the middle of manufacturing after FIG. 4, and FIG. 5B is a view showing a completed state.

FIG. 6 is a perspective view illustrating a manufacturing process according to a fourth embodiment of the present invention.

7 is a perspective view of a fourth embodiment of the present invention, FIG.
(B) is a diagram showing a completed state in the middle of manufacturing after the step (b).

FIG. 8 is a perspective view showing a joint portion according to a fifth embodiment of the present invention.

FIG. 9 is a perspective view showing a state in the process of manufacturing a joint part according to a fifth embodiment of the present invention.

FIG. 10 is a perspective view showing a state in the process of manufacturing a joint part according to a sixth embodiment of the present invention.

FIG. 11 is a perspective view of a conventional example.

FIG. 12 is a sectional view of a conventional example.

FIG. 13 is a perspective view of another conventional example.

FIG. 14 is a perspective view of still another conventional example.

[Explanation of symbols]

30, 50, 60, 70, 80, 90 Joint part of flat circuit body 31, 77, 87 Bus bar 33 Branch terminal 35 Electric wire 37 Electric wire side terminal 41, 42, 51, 91 Insulating film 52 Bending line 55 Mounting hole 62 Cut 62A , 62B Two points on the bending line 63 Tongue piece 72 Bending piece 75, 85 Conductive layer

Claims (14)

(57) [Claims] An electric wire-side terminal provided at a terminal of a plurality of electric wires, a bus bar integrally having a plurality of branch terminals fitted to each electric-wire-side terminal; A joint portion for a flat circuit body, comprising: a wire terminal and two insulating films sandwiching a bus bar. 2. A wire-side terminal provided at an end of a plurality of wires is fitted to each of a plurality of branch terminals connected to a bus bar, and the wire end and the bus bar including the two terminals are connected to each other.
A method for manufacturing a joint portion of a flat circuit body, comprising sandwiching between two insulating films and adhering the two insulating films in close contact with each other. 3. The method of manufacturing a joint portion of a flat circuit body according to claim 2, wherein an adhesive is applied to at least one surface of the two insulating films on a bonding side, and the two insulating films are bonded together. After drilling a large number of vacuum holes in one of the insulating films and laminating the two insulating films in a state where the terminal of the electric wire and the bus bar are sandwiched between the two terminals, the air between the two insulating films is removed. A method for manufacturing a joint portion of a flat circuit body, comprising: suctioning through the vacuum evacuation hole, thereby bringing two insulating films into close contact with each other, and adhering with the adhesive. 4. The joint portion of a flat circuit body according to claim 1, wherein a mounting hole for a mounting target portion is provided in a blank portion of the insulating film. 5. The joint portion of a flat circuit body according to claim 1, wherein the two insulating films are formed of one or more insulating films.
A joint portion of a flat circuit body, wherein the joint portion is formed by bending a piece of insulating film. 6. The joint portion of the flat circuit body according to claim 5, wherein a bending hole of the two insulating films formed by bending the one insulating film has a mounting hole for a mounting target portion. A flat circuit characterized in that the tongue pieces are connected to each other, the tongue pieces are cut into one of the insulating films, and the inner pieces of the cuts are cut and raised to extend to the other insulating film. Joint part of the body. 7. The flat circuit body according to claim 6, wherein an adhesive is applied to a surface which is inside when the one insulating film is bent. Joint part. 8. A folding line is set on one insulating film coated with an adhesive on one side, and two points having a space on the folding line adjacent to the folding line on one side of the folding line. Into the continuous piece with the starting point and the end point, and make a mounting hole for the mounting target part in the inner piece of this notch.On the other hand, a plurality of wire side terminals provided at the ends of the plurality of wires are connected to the bus bar. The terminals of the electric wire and the bus bar including both terminals are arranged on one side of the bending line on the surface of the insulating film on the side where the adhesive is applied, and in that state, the insulating film is The ends of the electric wire including both terminals and the bus bar are sandwiched between the two insulating films by bending at the bending line, and the two insulating films are adhered to each other with an adhesive, and simultaneously A method of manufacturing a joint portion of a flat circuit body, wherein the inner piece of the cut is left as a tongue piece for mounting without being bent at the time of bending. 9. The joint portion of a flat circuit body according to claim 1, wherein the bus bar is attached to a bent piece provided on one of the insulating films and at least one surface of the bent piece by a thin film forming process. A joint portion of the flat circuit body, the joint portion comprising: 10. The joint portion of a flat circuit body according to claim 9, wherein metal plating is applied as the thin film forming process. 11. The flat circuit body according to claim 10, wherein the two insulating films are formed by bending one insulating film. Joint part. 12. The joint part of a flat circuit body according to claim 10, wherein a grounding terminal part is provided on the bus bar. 13. A bent piece is provided on one of the insulating films, a conductor layer is formed on the surface of the bent piece by a thin film forming process, and a plurality of branch terminals are provided by the bent piece having the conductor layer. Constituting a bus bar, each branch terminal of the bus bar constituted by the bent piece is fitted to each wire side terminal provided at the end of the plurality of wires, and the wire terminal and the bus bar including the both terminals, It is arranged on one side of the one insulating film, covered with the other insulating film from above, and in a state where the terminal of the electric wire including the two terminals and the bus bar are sandwiched therebetween, the two insulating films are adhered and adhered. A method for manufacturing a joint portion of a flat circuit body, comprising: 14. The method for manufacturing a joint portion of a flat circuit body according to claim 13, wherein the one insulating film and the other insulating film are formed by bending one insulating film. A method for manufacturing a joint portion of a flat circuit body.