JP2001203037A - Connection structure of wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify connection of a number of wire harnesses with an electric junction box, and fitting to a car body. SOLUTION: A circuit built-in case is arranged as a connector to be fitted to terminals of a group of wire harness wire and a tab or a female terminal part is provided in the built-in circuit to protrude into a concave set in the case main body. Further, a fixing through-hole for a bolt to penetrate into the case is provided with the case main body, and also, another fixing through- hole is provided with an electric junction box for connecting with the wire harnesses, while, on the other hand, a bolt is kept protruding from a car body, and the circuit built-in case is put through the bolt connected to a plurality of wire harnesses to connect one circuit with another. The above electric junction box is arranged at either outside or inside of the arrayed circuit built-in case to be put through the bolt, to connect the circuits in the circuit built-in cases with circuits in the electric junction box and the above bolt is tightened with a nut.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure for wiring harnesses arranged in an automobile, and more particularly to an improvement in the connection workability of a large number of wire harnesses connected to a junction box and the connection workability of wire harnesses. It is intended.

[0002]

2. Description of the Related Art As shown in FIGS. 19 and 20, a junction box 1 is provided at a so-called dash side on both front sides (in a right-hand drive vehicle, next to the right foot of a driver's seat and to the left of a front passenger's seat). Are arranged, and a large number of wire harnesses W / H are connected to the junction box 1 so that the junction box 1 is very crowded.

In the assembly procedure, a worker holds the junction box 1 with one hand, and fits and connects the connectors 2 of a number of wire harnesses W / H to the connector accommodating chamber 1a of the junction box 1 with the other hand. After the connection of the wire harness connector to the junction box 1 is completed, the junction box 1 is fastened and fixed to the vehicle body 3 (dash panel) with bolts 4 or fixed using a crank pin or the like. Junction box 1 into body 3
Then, it is attached to the vehicle body 3 so as to cover the interior material 5 (trim), and the operation of assembling the junction box connected to the wire harness to the vehicle body is completed.

[0004]

A large number of wire harnesses W / H such as a front harness (engine room harness), a door harness, a floor harness, a roof harness, an instrument panel harness, and a cowl harness are connected to the junction box 1 from multiple directions. In addition, since a large number of connectors 2 connected to the terminals of the respective wire harnesses are fitted and connected to the connector accommodating portion 1a of the junction box, the size is extremely large. The operation of attaching the junction box 1 to which the multiple wire harnesses are connected in a complicated manner to the vehicle body 3 is on the dash side as described above, so that an operator cannot look into the vehicle interior from the outside of the vehicle (Z) with the middle waist. It must be performed in a stable position, which is the most difficult task in assembling a wire harness to a car.

[0005] Further, in connection of the connector of the wire harness W / H to the junction box 1, the operator holds the junction box 1 with one hand as described above.
Holding the connector with the other hand is a two-handed operation, and since the connector connection is performed by the operator using the fingertip, the burden on the worker is extremely large and the electrical connection reliability of the connector is high. But there is a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to facilitate the work of connecting a large number of wire harnesses to a junction box, the work of attaching the junction box to a vehicle body, and improve the connection reliability. And

[0007]

In order to solve the above-mentioned problems, the present invention provides a case with a built-in circuit body as a connector to be attached to a terminal of a wire group of a wire harness. A circuit body made of an electric wire or an FPC is built in the case body, and the electric wire terminals are connected to the terminals of these circuit bodies, and a tab or a female terminal portion is provided on the circuit body so that the circuit body is provided in a recess provided in the case body. The case body is provided with mounting through holes for bolt penetration, while the electrical connection box connected to the wire harness is also provided with mounting through holes, and bolts are protruded from the vehicle body. Then, the case with built-in circuit body connected to a plurality of wire harnesses is passed side by side by bolts to be in contact with each other, and the tabs and the female terminals or the tabs are connected to the relay terminals. The electric connection box is arranged outside or inside the juxtaposed circuit body built-in case, and is juxtaposed by passing through a bolt. And the circuit body of
A connection structure of a wire harness is provided, in which a nut is fastened to the bolt to connect a plurality of wire harnesses to an electric connection box via a circuit body built-in case.

The electric connection box is formed of a junction box, and the circuit body built-in case is connected to a plurality of or all of a front harness, a floor harness, a cowl harness, an instrument panel harness, a roof harness, and a door harness. .

As described above, a bolt is projected from a vehicle body, and a through hole for mounting a circuit body built-in case and an electric connection box is sequentially passed through the bolt and fastened with a nut to assemble the bolt. The circuit body built-in case connected to each wire harness can be assembled to the bolt by one-handed operation, and the junction box can also be assembled, so that workability can be improved. The bolts may be passed through the four corners of the circuit body built-in case and the junction box so as to protrude from the vehicle body side, and the bolts may be inserted through bolt holes provided in the center of the case and then tightened with nuts. Further, the junction box may be passed through the bolt first, or the junction box may be passed through the bolt and fastened with a nut after all the circuit-body-containing case is passed through the bolt.

[0010] The present invention is not limited to the case where the case with a built-in circuit connected to a large number of wire harnesses is connected to the junction box. The case with a built-in circuit connected to the wire harness is connected to another electrical connection box other than the junction box. Needless to say, it can be assembled by a method.

Further, the present invention is not limited to the case where the electric connection box and the circuit body built-in case are assembled to bolts protruding from the vehicle body.
The circuit body built-in case connected to the wire harness and the mounting hole provided in the electrical connection box are bolted into the mounting hole and fastened and secured with nuts. The invention is applicable.

That is, according to the present invention, a circuit built-in case is provided as a connector to be attached to a terminal of a wire group of a wire harness. The circuit built-in case includes a circuit body made of a bus bar, an electric wire, or an FPC inside the case body. And the above-mentioned electric wire terminals are connected to the ends of these circuit bodies, and tabs or female terminal portions are provided on the circuit bodies so as to protrude into recesses provided in the case body, and bolts are passed through the case body. While mounting through holes for mounting
The electric connection box connected to the wire harness is also provided with a through hole for mounting, and the circuit built-in cases connected to the plurality of wire harnesses are sequentially passed through bolts to abut and are juxtaposed. Parts or tabs are connected via a relay terminal, and the electric connection box is arranged outside or inside the juxtaposed circuit body built-in case, and is juxtaposed by passing through bolts. Provided is a wiring harness connection structure in which a circuit body is connected to a circuit body in an electric connection box, a nut is fastened to the bolt, and a plurality of wire harnesses are connected to the electric connection box via a circuit body built-in case. are doing.

Further, the present invention is also applied to a case where wire harnesses are connected to each other, and it is not always necessary to connect a circuit body built-in case to an electric connection box. That is, the present invention provides a circuit body built-in case as a connector to be attached to a terminal of a wire group of a wire harness, and the circuit body built-in case incorporates a circuit body made of a bus bar, an electric wire, or an FPC in a case main body. While connecting the electric wire terminal to the terminal, a tab or a female terminal portion is provided on the circuit body to protrude into a recess provided in the case main body, and the circuit body built-in case connected to a plurality of wire harnesses is abutted and coupled. Thus, the present invention provides a wire harness connection structure in which the tab and the female terminal portion or the tabs are connected via a relay terminal.

The circuit body built-in case is made of a rectangular flat plate or an L-shaped flat plate in which a circuit body is insert-molded, and is sequentially contacted in a juxtaposed state, and the tab or the female terminal portion is provided on the corresponding contact surface. It is preferable that a concave portion is provided so as to correspond in a contact state. The circuit body is not limited to the insert molding, and the case body may be composed of a lower case and an upper case, and after attaching the circuit body to the lower case, the upper body may be covered and joined.

It is preferable that the circuit body built in the circuit body built-in case is in contact with the bolt to be penetrated and grounded. When an electric connection box such as a junction box is connected to the case with a built-in circuit body by bolts, it is preferable that the internal circuit of the electric connection box is also brought into contact with the bolts and grounded. Specifically, a bus bar is used as a circuit body, a through hole of the bus bar is provided at a position of a mounting through hole for passing a bolt, and an inner peripheral surface of the through hole is brought into contact with the bolt. When an electric wire is used as the circuit body, a round terminal may be connected to the electric wire, and the round terminal may be brought into contact with a bolt.

As a circuit body to be built in the above-mentioned circuit body built-in case, a bus bar formed by punching a conductive metal plate corresponding to a circuit shape and a strip-shaped bus bar are arranged crosswise in the X and Y directions. A welded connection, an insulated wire cross-wired in the X and Y directions, and core wires connected at required intersections by welding or crimping terminals, or FPC is used.

The circuit body inside the circuit body built-in case is provided with a tab at the tip, and the tab is protruded in a side-by-side state on the side surface of the case body. Connected. In the case of terminal connection, it is preferable to connect the circuit body and the electric wire by housing the terminal provided at the end of the electric wire group of the wire harness in the connector and fitting the connector to the case.

When a circuit in a case with a built-in circuit body is connected to a circuit in another case with a built-in circuit body by skipping one circuit body through an adjacent case with a built-in circuit body or by skipping a plurality of circuits, and When connecting through the circuit built-in case interposed between the circuit body in the connection box and the circuit body that is not connected to the wires of the wiring harness, insert the tab and female By sequentially connecting the terminals, a desired circuit-containing case or a circuit in an electric connection box is connected. Alternatively, a through hole is provided in the through-hole case with a built-in circuit body, and the through-hole is connected to a female terminal provided in a required case with a built-in circuit body or an electric connection box through a long tab. The connection of the circuit body does not directly fit and connect the tab and the female terminal portion, but only the tab is provided on the circuit body, and even if the connection is performed via a relay terminal provided with a pair of female terminal portions. Good.

[0019]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 show a schematic assembling method according to a first embodiment of the present invention. In the present invention, the connector for connecting each wire harness to the junction box is a flat-plate-shaped circuit-body-containing case 10,
Circuit body built-in case 10 connected to each wire harness
(Circuit built-in case 10 connected to front harness
A, circuit body built-in case 10 connected to floor harness
B, circuit body built-in case 10 connected to roof harness
C, circuit body built-in case 10 connected to cowl harness
D, case 1 with built-in circuit connected to instrument panel harness
0E, circuit body built-in case 10 connected to door harness
F).

The large number of circuit-body-containing cases 10 (10A)
10F), a mounting through hole 11 is provided, and the bolts 12 are welded in advance from the vehicle body (dash panel) 3 and sequentially passed through the bolts 12 to be stacked in a parallel state and mounted. A junction box 15 having a hole 14 is passed through a stud bolt 12, and a large number of circuit-body-containing cases 10 are
The nut 13 is fastened to the bolt 12 while holding the circuit body and the junction box 1 with the circuit body built-in case 10.
5 is fixed to the vehicle body 3, and finally the trim 5 is attached to the vehicle body 3.

The circuit-body-containing case 10 connected to each of the wire harnesses has a busbar built therein as a circuit, and the busbars in the circuit-body-containing case and the busbars of the circuit-body-containing case are connected to the junction box 1.
The electrical connection is achieved by connecting to the bus bar in 5. The circuit body of the circuit body built-in case 10 is not limited to the bus bar, but may be a covered electric wire, an FPC (flexible printed circuit), or the like.

The circuit-body-containing case 10 corresponding to a connector to be connected to a conventional wire harness terminal has a structure shown in FIGS. A bus body 20 formed by stamping a conductive metal plate corresponding to a circuit shape is insert-molded to form a rectangular flat plate body 21. On one side of the case main body 21, concave portions 21a for terminal connection are provided in parallel, tabs 20a formed on the bus bar 20 built in each concave portion 21a are respectively protruded, and a terminal of each electric wire w of the wire harness W / H is provided. Core wire w-
a is connected by ultrasonic welding or resistance welding. After the connection, the cover 23 is put on the lock claw 2 of the case body 21.
1b is locked in the lock hole 23a of the cover 23 by locking.

As shown in FIG. 4, a female terminal 24 may be connected to the end of the electric wire w of the wire harness, and the female terminal may be fitted and connected to the tab 20a. In this case, a connector is provided in which the female terminals 24 are accommodated in the terminal accommodating chambers arranged side by side, and the connectors are fitted into the tab juxtaposed portions of the case body so that the female terminals 24 and the tabs 20a are fitted. Is preferred.

In the case 10 with a built-in circuit body shown in FIG.
The recesses 21a are provided side by side on one side of the case
Although 0a is exposed, a concave portion 21a may be provided on the other side to expose the tab 20a, and the electric wires of the wire harness may be connected from two to four directions. Further, instead of providing the bus bar by insert molding the bus bar,
A lower case provided with a groove for press-fitting the bus bar and an upper case covering the bus bar after press-fitting may be employed.

Bus bar 20 built in case body 21
Forms a plurality of tabs 20a on one bus bar 20,
The wires that need to be connected to each other are connected inside the case. A bus bar 20 and a case main body 21 are configured as shown in FIGS. 5 to 7 in order to connect with wires of another wire harness and circuits in a junction box.

That is, when it is necessary to connect the circuits of the circuit-body-containing cases 10A and 10B which are adjacently arranged in parallel, as shown in FIG.
The tab 20b is bent and provided on the inner bus bar 20-1 and protrudes into the recess 21b provided on the case body 21. A female terminal 20c fitted to the tab 20b is provided in a bent manner on the bus bar 20-2 in the other circuit-body-containing case 10B, and a frame portion 21c surrounding the female terminal 20c protrudes. When the circuit body built-in cases 10A and 10B are stacked in parallel, the frame 21c fits into the recess 21b and the female terminal 20c
Are fitted and connected to the tab 20b.

Also, when connecting to a circuit of another case with a built-in circuit body, which is arranged one by one or two steps through the adjacent case with a built-in circuit body, or between the case and the junction box 15 When connecting the circuit inside the junction box 15 through all the built-in circuit body cases provided, a bus bar that is not connected to wires and other bus bars is provided in the circuit body built-in case to be through, and a tab is attached to the bus bar. And a female terminal are provided, and the female terminal and the tab of the adjacent circuit body built-in case are sequentially fitted and connected to be connected to a required circuit.

As shown in FIG. 6, the tab 20b 'provided to be bent on the bus bar 20 is elongated, and the tab 20b' is provided on the case body 21 of the circuit body built-in case 10 to be passed therethrough.
Is provided with a hole 21c that penetrates, and sequentially passes through the hole 21c,
It may be connected to a required circuit body built-in case or a circuit of the junction box 15.

Further, as shown in FIG. 7, the circuit connection between the circuit body built-in cases 10 is made by connecting the circuits 20-1 and 20
-2 may be provided with tabs 20b and 20b, respectively, and connected using the relay terminal 25 having a pair of female terminal portions 25a and 25b.

The case body 21 of the circuit body built-in case 10 (10A to 10F) connected to each of the above-mentioned wire harnesses.
And the case 16 of the junction box 15
As shown in FIG. 8, the mounting through holes 1
1a, 14a, and a mounting through hole 1 at the center.
1b and 14b are provided. In addition, these through holes 11
As shown in FIG. 9, the ground connection holes 20e of the built-in bus bar 20 are arranged at positions corresponding to the holes 11a and 11b, and the bolts 12 passing through the through holes 11a and 11b are formed on the inner peripheral surface of the ground connection hole 20e. The connecting bar 20f is brought into contact with the bus bar 20 in the circuit body built-in case 10 to connect the ground. Similarly, the bus bars (not shown) in the junction box 15 have through holes 14a, 14b.
A ground connection hole may be provided at a position corresponding to the above to establish a ground connection.

As described above, the circuit body built-in cases 10 (10A to 10F) connected to the respective wire harnesses are provided, while the five bolts 12 protrude from the vehicle body 3. At the time of assembling to the vehicle body 3, the circuit body built-in cases 10A to 10
F as shown in FIG. 1 and FIG.
1a and 11b are passed through bolts 12 and sequentially attached to the vehicle body 3 to be stacked in a side-by-side state. At this time, it is preferable that the connection direction between the wire group of the wire harness and the circuit-body-containing case 10 differs depending on the wiring direction of the wire harness and does not overlap with the adjacent wire harness.

As described above, since it is only necessary to sequentially pass the circuit body built-in case 10 through the bolts 12, the operator can perform the operation with one hand. In addition, since the circuit body built-in case 10 is sequentially laminated by passing through the bolts 12, the positioning is automatically performed, and the position between the tab and the female terminal that are mutually fitted between the circuit body built-in case 10 is determined. A required circuit connection is automatically made by sequentially stacking without any displacement.

After the circuit-body built-in cases 10A to 10F connected to a large number of wire harnesses as described above are stacked by passing through the bolts 12, the junction box 15 is also passed through the bolts 12 and fastened and fixed with nuts 13. In this state, required circuits are connected between the circuit-body-containing cases 10A to 10F, the wires of the wire harness are connected without passing through the junction box branch circuit, and the circuits of the circuit-body-containing cases 10A to 10F are The circuit of the junction box 15 is also connected. The central bolt may not be projected from the vehicle body, but may be passed through the other four corners of the baltic to set the circuit body built-in case 10 and the junction box 15 and then fastened and fixed with a nut through the central bolt.

The present invention is not limited to the above embodiment.
As shown in the second embodiment, the circuit-body-containing case 10 ′ in which one rectangular flat plate is divided into a plurality of pieces, instead of all the circuit-body-containing cases connected to the wire harness, is formed as a rectangular flat plate.
And 10 ".

In the second embodiment, the circuit-containing case 10 'connected to the door harness is a small rectangular flat plate, while the circuit-containing case 1 connected to the instrument panel harness is formed.
0 ″ is an L-shaped flat plate, and the circuit body built-in cases 10 ′ and 1
By combining with 0 ", a large rectangular flat plate having the same shape as the other circuit-body-containing case 10 is formed.

As shown in FIG. 11, the circuit connection between the circuit-body-containing case 10 'and 10 "is made by connecting the bus bar 20 to the lower end surface or the left end surface of the circuit-body-containing case 10'.
While the tab 20b of the
0 "is provided with a concave portion on the corresponding end face, and the female terminal portion 20c of the bus bar 20 is protruded and fitted and connected. In addition, the mounting through hole 11 is provided at the corner of the circuit body built-in case 10 '. Since the mounting through-holes 11 are also provided at the corners of the circuit body built-in case 10 ″, they can be mounted through the bolts 12 respectively.

As described above, when the number of wires of the wiring harness to be connected is small and the number of built-in busbars is also small, a subdivided circuit body built-in case is provided and combined with another circuit body built-in case, the vehicle body becomes The number of circuit-body-containing cases stacked between the junction box 3 and the junction box 15 can be reduced, and the required space can be reduced.

FIG. 12 shows a third embodiment, in which all of the circuit-body-containing cases 10A to 10F connected to the respective wire harnesses are L-shaped, and the L-shape is gradually reduced from the outside to the inside disposed on the side opposite to the vehicle body 3. So that they can be stacked. In the third embodiment, the junction box 15 is disposed on the vehicle body 3 side, contrary to the first embodiment,
Outside the circuit body built-in cases 10A to 10F (trim 5 side)
, And the shape of the junction box 15 is also fitted to the vehicle body side end faces of the circuit body built-in cases 10A to 10F in which the junction box 15 is also laminated.
Each end face 40 </ b> A to 40 </ b> F of 10 </ b> F is in contact with the junction box 15.

The above-mentioned L-shaped circuit body built-in cases 10A-1
As shown in FIG. 13, an L-shaped bus bar 20 is incorporated in the OFF, and the bus bar 20 is attached to the end surfaces 40A to 40A.
The tab 20b 'of the bus bar 20' is located at the position of 0F so that it can be directly fitted and connected to the female terminal of the bus bar in the junction box 15 without passing through another case with a built-in circuit.

In the third embodiment, first, a junction box 15 is supported by a bolt 12 projecting from the vehicle body 3, and then an inner circuit body built-in case 10 F
Through the bolts 12 and sequentially support 10E → 10D →
10C → 10B → 10A and the first embodiment are passed through the bolts 12 in the reverse order and supported and fastened and fixed with nuts.

In the third embodiment, the bus bars of all the circuit-body-containing cases 10A to 10F can be directly connected to the bus bars of the junction box 15, and the circuit-body-containing cases can be connected according to the number of bus bars built in the circuit-body-containing case. The size of the case can be changed, and the overall size can be reduced.

FIG. 14 shows a fourth embodiment, in which the circuit-body-containing cases 10 connected to the wire harness are connected to each other.
It is not connected to a junction box, but is applied only to the connection between wire harnesses. The structure of the circuit-body-containing case 10 is the same as that of the above-described embodiment. The circuit-body-containing case 10 to be connected to each other is provided with a mounting through hole 11 and is fixed integrally by tightening with a nut 13 'through a bolt 12'. ing. Instead of the integration by the bolt and the nut, a lock claw and a lock hole may be provided to fix the adjacent circuit body built-in case 10.

FIG. 15 shows a fifth embodiment, in which a plurality of wire harnesses are connected to an electric connection box 80 such as a fuse box or a relay box other than a junction box. The electric junction box 80 is connected to the case 10 with a built-in circuit body connected to a plurality of wire harnesses.
1 and 11 are provided, passed through a bolt 82, fastened with a nut 83, and are integrally assembled. These integrally assembled components may be provided by projecting a bracket 80b provided with a bolt hole 80a in the electric connection box 80, and fixing the electric connection box by bolting to a fixed body such as a vehicle body. What is necessary is just to fix to a to-be-fixed body by other appropriate fixing means.

FIGS. 16 to 18 show the circuit body built-in case 10.
5 shows a modification example of the circuit body incorporated in FIG. FIG. 16 (A) (B)
Are provided in the form of crosses in the X and Y directions via the insulating plate 53, connecting the tabs provided at one end of the bus bar 51 in the X direction to the electric wire w, and connecting the bus bars 52 and 52 in the Y direction. Opening 53 provided in insulating plate 53 at the intersection of positions
The connection is made by welding through a. These bus bars 51, 5
2 is provided with tabs 51b and 52b at its ends, and is connected to tabs of another case with a built-in circuit via relay terminals.

FIG. 17 shows covered electric wires 60 and 61 as a circuit body.
The insulated wires 60 and 61 are cross-wired in the X and Y directions similarly to the strip-shaped bus bar, and
As shown in (B), the male terminal 63 is connected to the end of the electric wire 60, and is fitted and connected to the female terminal connected to the electric wire end of the wire harness. As shown in (C) on both sides at the intersection of the required positions, the electric wires 60 and 61
They are connected by a press contact terminal 64 having 4a and 64b. In addition, as shown in (D), the core wires wa may be welded to each other by stripping the intermediate wire of the electric wire at the intersection position. Also,
The connection between the other circuit-body-containing case 10 and the junction box 15 is made by connecting a male terminal 65 to the terminals of the electric wires 60 and 61 via a relay terminal.

FIG. 18 uses an FPC 70 in which a copper foil is sandwiched between insulating films as a circuit body. The connection between the FPC 70 and the electric wire w of the wire harness is performed by welding the core wire wa of the electric wire w to the copper foil 71. The connection between the circuit-body-containing case and the connection with the circuit body of the junction box is made by welding an L-shaped tab 72 to the copper foil 71 and via a relay terminal.

Also in the case of the circuit body shown in FIGS. 16 to 18, the case body may be formed by insert molding as in the first embodiment, or the upper case may be attached after the circuit body is assembled in the lower case. It may be.

[0048]

As is apparent from the above description, according to the connection structure of a wire harness according to the present invention, when a large number of wire harnesses are connected to an electric connection box such as a junction box and attached to a vehicle body in this state. The operator only needs to pass the circuit built-in case connected to the wire harness and the electrical connection box to the bolts protruding from the vehicle body and the electrical connection box one by one, and fasten them with nuts. Since it can be sequentially performed by one-handed operation and the electric connection box is merely passed through the bolt, complicated operations can be easily performed, and the burden on the operator can be greatly reduced.

In particular, when a junction box connected to a large number of wire harnesses is mounted on the dash side of an automobile, the operation is performed from the outside of the vehicle body while the worker is in the middle. And the work of connecting the wire harness to the vehicle body and the work of assembling the wire harness to the vehicle body can be performed easily.

The present invention can be applied not only to the case where the wiring harness is attached to the vehicle body but also to the case where the wiring harness is connected to the electric connection box or the case where the wiring harnesses are connected to each other. The tabs and the female terminals are directly engaged with each other by connecting and connecting these circuit-body built-in cases and the electrical connection box, and connecting the circuit bodies in the circuit-body built-in case and the circuit body in the electrical connection box. Or via a relay terminal.

As described above, if a circuit-containing case is provided instead of the connector at the place where the connector was connected in the past, the branch connection circuit can be provided by the circuit inside the circuit-containing case. In addition, various connections can be made, and the number of electric wires can be reduced. When a connector is used, a large number of connectors are connected to one wire harness, and the work of fitting the connectors increases. However, as in the present invention, a circuit body built-in case is provided at the end of one wire harness. When attached, the fitting operation can be performed collectively, and the workability can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic view illustrating an assembly mode according to a first embodiment of the present invention.

FIG. 2 is a perspective view of FIG.

FIG. 3 is an exploded perspective view of a circuit body built-in case connected to a wire harness.

FIG. 4 is a view showing a modified example of a connection mode between a circuit body incorporated in a circuit body built-in case and an electric wire.

FIG. 5 is a drawing showing a connection form between circuit bodies in a circuit body built-in case.

FIG. 6 is a sectional view showing a modification of FIG.

FIG. 7A is a sectional view showing another modification of FIG. 5,
(B) is a perspective view of the relay terminal used.

FIG. 8 is a perspective view showing a relationship between a bolt protruding from a vehicle body and a circuit-body-containing case that passes through the bolt.

FIGS. 9A and 9B are diagrams showing a ground connection configuration using bolts.

FIG. 10 is a perspective view showing a second embodiment.

11 is a schematic diagram of a main part of FIG. 10;

FIG. 12 is a perspective view showing a third embodiment.

13 is a cross-sectional perspective view of a main part of FIG.

FIG. 14 is a schematic view of a fourth embodiment.

FIG. 15 is a schematic view of a fifth embodiment.

FIGS. 16A and 16B are views showing a modified example of a circuit body incorporated in a circuit body built-in case.

FIGS. 17A to 17D are diagrams showing another modified example of the circuit body built in the circuit body built-in case.

FIGS. 18A and 18B are diagrams showing another modified example of the circuit body incorporated in the circuit body built-in case.

FIG. 19 is a front view showing a conventional example.

FIG. 20 is a perspective view showing an assembly mode of FIG. 19;

[Explanation of symbols]

 Reference Signs List 3 body 5 trim 10 (10A to 10F) circuit built-in case 11, 14 mounting through hole 12 bolt 13 nut 15 junction box 20 bus bar 20a, 20b tab 20c female terminal 21 case main body 23 cover 25 relay terminal

Claims (7)

[Claims] 1. A circuit body built-in case is provided as a connector to be attached to a terminal of a wire group of a wire harness. The circuit body built-in case has a circuit body made of a bus bar, an electric wire, or an FPC built in the case body. The above-mentioned electric wire terminals are connected to the ends of these circuit bodies, and tabs or female terminal portions are provided on the circuit bodies so as to protrude into recesses provided in the case body, and the case body is provided with bolts for mounting. While a through hole is provided, an electric connection box connected to the wire harness is also provided with a through hole for mounting, and a bolt is protruded from a vehicle body, and a circuit body built-in case connected to a plurality of wire harnesses Are sequentially connected to each other by passing them through bolts, and the tab and the female terminal or the tabs are connected via a relay terminal, and the juxtaposed circuit body built-in cable is connected. Outside or inside of the scan by disposing the electrical connection box, juxtaposed through bolts,
A wire that connects the circuit body of the circuit body built-in case to the circuit body in the electric connection box, fastens a nut to the bolt, and connects a plurality of wire harnesses to the electric connection box via the circuit body built-in case. Harness connection structure. 2. The electric connection box comprises a junction box, and the circuit body built-in case is connected to a plurality or all of a front harness, a floor harness, a cowl harness, an instrument panel harness, a roof harness, and a door harness. The connection structure for a wire harness according to claim 1, wherein 3. A circuit body built-in case is provided as a connector to be attached to a terminal of a wire group of a wire harness. The circuit body built-in case has a circuit body made of a bus bar, an electric wire, or an FPC built in the case body. The above-mentioned electric wire terminals are connected to the ends of these circuit bodies, and tabs or female terminal portions are provided on the circuit bodies so as to protrude into recesses provided in the case body, and the case body is provided with bolts for mounting. While a through hole is provided, a through hole for mounting is also provided in the electric connection box connected to the wire harness. The tab and the female terminal or the tabs are connected via a relay terminal, and the electrical connection is made to the outside or inside of the juxtaposed circuit body built-in case. Are arranged side by side through bolts, connect the circuit body in the circuit body built-in case and the circuit body in the electric connection box, fasten nuts to the bolts, and connect a plurality of wire harnesses to the circuit body built-in case. The connection structure of the wire harness connected to the electrical junction box via. 4. A circuit body built-in case is provided as a connector to be attached to a terminal of a wire group of a wire harness. The circuit body built-in case has a circuit body made of a bus bar, an electric wire or an FPC built in a case main body. Along with connecting the electric wire terminal to the circuit body, a tab or a female terminal portion is provided on the circuit body to protrude into a recess provided in the case body, and a circuit body built-in case connected to a plurality of wire harnesses is abutted and coupled. A wire harness connection structure in which the tab and the female terminal portion or the tabs are connected via a relay terminal. 5. The circuit body built-in case comprises a rectangular flat plate or an L-shaped flat plate in which a circuit body is insert-molded, and abuts sequentially in a juxtaposed state. The connection structure of a wire harness according to any one of claims 1 to 4, wherein the provided concave portion is provided so as to correspond in a contact state. 6. The wiring harness connection structure according to claim 3, wherein the circuit body incorporated in the circuit body built-in case is connected to the ground by contacting the bolt to be penetrated. 7. A circuit body in the circuit body built-in case is provided with a tab at a tip, and the tab is protruded in a side-by-side state on a side surface of the case body, via a terminal and a terminal of a wire group of a wire harness, or The wire harness connection structure according to claim 1, wherein the wire harness connection structure is connected by welding.