CN116365310A

CN116365310A - Wiring structure

Info

Publication number: CN116365310A
Application number: CN202211724507.2A
Authority: CN
Inventors: 牧野匡宏; 下津佐润
Original assignee: Yazaki Corp
Current assignee: Yazaki Corp
Priority date: 2021-12-27
Filing date: 2022-12-27
Publication date: 2023-06-30

Abstract

The present invention provides a wiring structure capable of easily wiring a plurality of wiring materials to an electrical connection box through an annular ferrite. The wiring structure is a wiring structure of a wiring member (100) connected to an electrical connection box (1), wherein the wiring member (100) is provided with an electrical wire (60) and a plate-shaped bus bar (10) at least a part of which is covered by a housing (30), and the bus bar (10) is provided with a terminal connection part (21) connected to the electrical connection box (1) and a parallel wiring part (10A) adjacent to the electrical wire (60) and penetrating through an annular ferrite (71), and is bent between the terminal connection part (21) and the parallel wiring part (10A) at least at one position along the arrangement direction of the electrical wire (60).

Description

Wiring structure

Technical Field

The present invention relates to a wiring structure.

Background

For example, an electrical junction box such as a junction block mounted on a vehicle such as an automobile may use a bus bar for its internal wiring (for example, refer to patent document 1). The electrical connection box has a terminal to which a wiring material from the outside is connected. As a wiring material to be connected to the terminal, an electric wire is used in view of ease of connection and the like.

Prior art literature

Patent literature

Patent document 1: japanese patent application laid-open No. 2021-151054

Problems to be solved by the invention

However, in a vehicle such as an electric vehicle or a hybrid vehicle, in which an electric motor is used as a driving source, a large-diameter electric wire is routed to an electric junction box in order to flow a large-current and high-voltage current. In addition, when a large current or a high-voltage current is applied to the electric wire, it is necessary to pass the electric wires of the positive electrode and the negative electrode through annular ferrite to suppress noise.

However, since large-diameter wires are difficult to bend easily, it is difficult to route the wires of the positive and negative electrodes to the electrical connection box through the annular ferrite.

Disclosure of Invention

The present invention has been made in view of the above circumstances, and an object thereof is to provide a wiring structure capable of easily wiring a plurality of wiring materials to an electrical connection box through an annular ferrite.

The above object of the present invention is achieved by the following structure.

A wiring structure is a wiring structure of a wiring member connected to an electrical connection box, wherein,

the wiring member includes:

an electric wire;

a plate-shaped bus bar, at least a part of which is covered by the housing,

the bus bar has:

a connection part connected to the electrical connection box;

a parallel wiring section which is adjacent to the electric wire and passes through the annular ferrite,

the bus bar is bent at least at one position along an arrangement direction of the electric wires between the connection portion and the parallel wiring portion.

Effects of the invention

According to the present invention, a wiring structure can be provided in which a plurality of wiring materials can be easily wired to an electrical connection box through an annular ferrite.

The present invention is briefly described above. Further, the detailed description of the present invention will be more clearly understood by reading the mode for carrying out the invention described below (hereinafter referred to as "embodiment") with reference to the drawings.

Drawings

Fig. 1 is a perspective view of a connection portion of a wiring member in an electrical junction box to which the wiring structure of the present embodiment is applied.

Fig. 2 is a perspective view of the wiring member.

Fig. 3 is a perspective view of the ferrite case of the wiring member in a state of being detached.

Fig. 4 is a perspective view of a bus bar constituting a wiring member.

Fig. 5 is a perspective view of a bus bar connected to an electric wire and covered by a housing.

Fig. 6 is a perspective view of a state in which a cover portion of a receiving portion of a bus bar connected to an electric wire and covered by a housing is opened.

Fig. 7 is a perspective view of the housing portion in a state where the cover portion is opened.

Fig. 8 is a longitudinal sectional view of the housing portion in the wiring direction in a state where the lid portion is closed.

Fig. 9 is a perspective view of the lid of the storage unit according to the first modification.

Fig. 10 is a longitudinal cross-sectional view of the housing portion in the wiring direction in a state where the lid portion of the housing portion of the first modification is closed.

Fig. 11 is a perspective view of a housing portion according to a second modification.

Fig. 12 is a side view of a housing portion according to a second modification.

Fig. 13 is a side view of a housing portion of the second modification.

Fig. 14 is a schematic cross-sectional view showing a state where the electric wire and the bus bar pass through the ferrite.

Detailed Description

Hereinafter, a specific embodiment of the present invention will be described with reference to the drawings.

As shown in fig. 1, the wiring structure of the present embodiment is a structure in which a wiring member 100 is wired to an electrical connection box 1 (for example) such as a junction block. The electrical junction box 1 has two

terminal portions

2, 3. The wiring member 100 is provided with the bus bar 10 and the electric wire 60 as wiring materials, and the ends of the bus bar 10 and the electric wire 60 are fastened and connected to the

terminal portions

2, 3 of the electrical junction box 1. Thereby, the wiring member 100 is wired to the electrical junction box 1. The bus bar 10 and the electric wire 60 of the wiring member 100 are wiring materials connected from the electrical junction box 1 to a battery or the like, one of which is a positive electrode and the other of which is a negative electrode.

Fig. 2 is a perspective view of the wiring member. Fig. 3 is a perspective view of the ferrite case of the wiring member in a state of being detached.

As shown in fig. 2 and 3, the wiring member 100 including the bus bar 10 and the electric wire 60 has a ferrite portion 70. Ferrite 71 is provided in ferrite portion 70, and ferrite 71 is covered with ferrite case 72 made of insulating resin. The ferrite 71 is composed of a pair of

split ferrites

71a and 71b, and these

split ferrites

71a and 71b are combined with each other to form an elliptical ring shape.

The bus bar 10 and the electric wire 60 pass through the annular ferrite 71, and the outer periphery thereof is covered with the ferrite 71 in the entire circumferential direction. Thus, even when a high-voltage/high-current flows through the bus bar 10 and the electric wire 60, the generation of noise can be suppressed by the ferrite 71. In the ferrite 71, the bus bar 10 and the electric wire 60 are formed as

parallel wiring portions

10A, 60A which are adjacent to each other and are wired in parallel.

The electric wire 60 disposed parallel to the bus bar 10 is constituted by an insulated electric wire, the outer periphery of the core wire of which is covered with a sheath constituted by an insulating resin, and a terminal fitting 61 having a hole 61a is connected to one end of the electric wire 60. The terminal fitting 61 of the electric wire 60 provided at one end portion is connected to the terminal portion 3 of the electric connection box, and the other end portion of the electric wire 60 is connected to, for example, a terminal of a battery.

Fig. 4 is a perspective view of a bus bar constituting a wiring member.

As shown in fig. 4, the bus bar 10 is formed in a plate shape. The bus bar 10 is formed of a plate material made of a conductive metal material such as copper, copper alloy, aluminum, or aluminum alloy. One end portion of the bus bar 10 is a terminal connection portion (connection portion) 21 having a hole portion 21a, and the other end portion is an electric wire connection portion 22 having a hole portion 22 a. In the bus bar 10, the terminal connection portion 21 is connected to the terminal portion 2 of the electric connection box 1, and the electric wire 23 is connected to the electric wire connection portion 22.

The other end portion side of the bus bar 10 having the wire connection portion 22 is formed as a parallel wiring portion 10A. In the parallel wiring section 10A, the bus bar 10 passes through the ferrite 71 so that the width direction thereof is along the arrangement direction of the bus bar 10 and the electric wires 60.

The bus bar 10 has a horizontal bent portion 10B bent at right angles to the horizontal direction at an end portion of the parallel wiring portion 10A opposite to the wire connection portion 22. The bus bar 10 has a horizontal extension portion 10C bent at the horizontal bending portion 10B and extending laterally with respect to the parallel wiring portion 10A. The end of the horizontal extension portion 10C opposite to the parallel wiring portion 10A has a vertical bent portion 10D that is vertically bent. The terminal connection portion 21 side of the vertical bent portion 10D becomes a vertical extension portion 10E extending to the opposite side of the wire connection portion 22. The end of the vertical extension portion 10E on the terminal connection portion 21 side has a vertical bent portion 10F that is vertically bent, and the opposite side of the vertical bent portion 10F from the vertical extension portion 10E becomes the terminal connection portion 21. In this way, the bus bar 10 is bent at the horizontal bent portion 10B and the vertical

bent portions

10D, 10F to change the extending direction.

Fig. 5 is a perspective view of a bus bar connected to an electric wire and covered by a housing. Fig. 6 is a perspective view of a state in which a cover portion of a receiving portion of a bus bar connected to an electric wire and covered by a housing is opened.

As shown in fig. 5 and 6, the portion of the bus bar 10 other than the terminal connection portion 21 and a portion of the vertical extension portion 10E is covered with the housing 30. The housing 30 is constituted by a first housing 31 and a second housing 32.

The first housing 31 is mounted on the lower side of the bus bar 10, and the lower side of the bus bar 10 is covered by the first housing 31. The second housing 32 is mounted on the upper side of the bus bar 10, and the upper side of the bus bar 10 is covered by the second housing 32. The second housing 32 is assembled to the first housing 31 mounted on the bus bar 10 from the upper side. Thereby, the first case 31 and the second case 32 are mounted to the bus bar 10, and the bus bar 10 is covered by the case 30 constituted by the first case 31 and the second case 32.

The housing 30 constituted by the first housing 31 and the second housing 32 has a plurality of locking portions 37. The locking portion 37 is constituted by a locking claw 38 formed in the first housing 31 and a locking hole 39 formed in the second housing 32. By assembling the second housing 32 to the first housing 31 attached to the bus bar 10, the locking claw 38 enters the locking hole 39, thereby locking the locking portion 37. This locks the first case 31 and the second case 32 in an assembled state.

Fig. 7 is a perspective view of the housing portion in a state where the cover portion is opened. Fig. 8 is a longitudinal sectional view of the housing portion in the wiring direction in a state where the lid portion is closed.

As shown in fig. 7 and 8, the housing 30 includes a housing portion 40 having a housing space S, and a connection portion between the wire connection portion 22 and the wire 23 of the bus bar 10 is housed in the housing space S of the housing portion 40. The electric wire 23 is constituted by an insulated electric wire having an outer periphery of the core wire covered with an outer sheath made of an insulating resin, and is connected to a terminal of a battery, for example. The terminal fitting 24 having the hole 24a is connected to the end of the electric wire 23, and the end to which the terminal fitting 24 is connected is accommodated in the accommodation space S of the accommodation portion 40.

The housing portion 40 has a bottom wall portion 41, a peripheral wall portion 42, and a lid portion 43, and a housing space S is formed by the bottom wall portion 41, the peripheral wall portion 42, and the lid portion 43. The bottom wall 41 is formed in the first case 31, and the peripheral wall 42 and the lid 43 are formed in the second case 32.

The peripheral wall portion 42 is constituted by two side wall portions 44 opposed to each other and two end wall portions 45 provided so as to be connected to the end portions of the side wall portions 44 and opposed to each other. The peripheral wall portion 42 is provided to stand from the peripheral edge of the bottom wall portion 41. A lead-out recess 45a is formed in one end wall 45 constituting the peripheral wall 42, and the electric wire 23 passes through the lead-out recess 45a.

The cover 43 is integrally formed with a side wall 44 constituting the peripheral wall 42 via a hinge 46. The cover 43 is rotatably coupled to the side wall 44 by a hinge 46. The other side wall portion 44 constituting the peripheral wall portion 42 is formed with locking portions 44a, and these locking portions 44a can be locked in locking holes 43a formed in an edge portion of the lid portion 43 on the opposite side to the side where the hinge portion 46 is formed.

A stud bolt 48 is provided upright on the bottom wall portion 41 constituting the housing portion 40. In a state where the stud bolts 48 are inserted into the holes 22a, the wire connection portions 22 of the bus bar 10 are accommodated in the accommodation space S. The terminal fitting 24 of the electric wire 23 in which the stud bolt 48 is inserted into the hole 24a is overlapped on the electric wire connecting portion 22. Then, nuts (fasteners) 49 are screwed and fastened to the stud bolts 48, whereby the wire connecting portions 22 of the bus bar 10 are fastened to the terminal fittings 24 of the wires 23.

The housing portion 40 housing the connection portion of the bus bar 10 and the electric wire 23 covers the upper portion of the peripheral wall portion 42 by rotating the cover portion 43 to block the housing space S. At this time, the locking hole 43a of the cover 43 is locked to the locking portion 44a of the side wall 44. Thereby, the rotation of the cover 43 is restricted, and the state in which the storage space S is blocked is maintained.

A recess 51 is formed in the cover 43, and the tip of the stud bolt 48 is inserted into the recess 51 while blocking the storage space S. An engagement wall 52 is formed at the peripheral edge of the recess 51. In a state where the cover 43 blocks the storage space S, the engaging wall 52 has a protruding dimension such that an end surface thereof is disposed at a position opposite to the nut 49 fastened to the stud 48 without a gap. Therefore, when the fastening of the nut 49 to the stud 48 is insufficient, the end face of the engagement wall 52 of the cover 43 hits the nut 49 because the nut 49 floats. Therefore, the housing space S cannot be completely closed by the cover portion 43, and the locking portion 44a of the side wall portion 44 cannot be locked in the locking hole 43a of the cover portion 43, whereby a connection failure between the wire connection portion 22 of the bus bar 10 and the terminal fitting 24 of the wire 23 can be detected.

As described above, according to the wiring structure of the present embodiment, since the bus bar 10 and the electric wire 60 pass through the annular ferrite 71, generation of noise when current flows through the bus bar 10 and the electric wire 60 can be suppressed by the ferrite 71.

The bus bar 10 is bent in the arrangement direction of the electric wires 60 between the terminal connection portion 21 connected to the electric connection box 1 and the parallel wiring portion 10A inserted into the ferrite 71. Therefore, the bus bar 10 can be smoothly guided from the connection portion with the electric connection box 1 into the ferrite 71 adjacent to the electric wire 60. Therefore, a plurality of wiring materials composed of the electric wires 60 and the bus bars 10 can be smoothly wired into the electrical junction box 1 through the annular ferrite 71.

Further, since the housing 30 covering the bus bar 10 includes the housing portion 40 having the housing space S in which the connection portion between the bus bar 10 and the terminal fitting 24 is housed, the connection portion between the bus bar 10 and the terminal fitting 24 can be housed and protected in the housing space S of the housing portion 40. Further, by opening the cover 43, the connection portion between the bus bar 10 and the terminal fitting 24 in the storage space S can be visually checked, and the presence or absence of the nut 49 and the connection state can be confirmed.

The cover 43 has an engagement wall 52, and the engagement wall 52 is disposed at a position opposite to the nut 49 without a gap in a state where the storage space S is closed. Therefore, when the nut 49 is loosened and lifted, the engagement wall 52 contacts the nut 49, and the cover 43 cannot be closed, whereby a defective connection between the bus bar 10 and the terminal fitting 24 can be detected. In addition, since the cover portion 43 is rotatably provided on the peripheral wall portion 42, the number of components can be reduced.

The parallel wiring portion 10A of the bus bar 10 passes through the ferrite 71 so that the width direction thereof is along the arrangement direction of the wires 60. Therefore, by wiring the wiring member 100 into the vehicle such that the arrangement direction of the bus bar 10 and the electric wire 60 is the horizontal direction, it is possible to suppress an increase in height and smoothly wire into a narrow wiring space of the vehicle with a limited height.

Next, a modification of the housing portion will be described.

Fig. 9 is a perspective view of the lid of the storage unit according to the first modification. Fig. 10 is a longitudinal cross-sectional view of the housing portion in the wiring direction in a state where the lid portion of the housing portion of the first modification is closed.

As shown in fig. 9 and 10, the housing portion 40A of the first modification includes a cover portion 43 that is separate from the peripheral wall portion 42.

The peripheral wall portion 42 has one locking portion 44a on one side wall portion 44, and two locking portions 44a on the other side wall portion 44. The cover 43 has one locking hole 43a at one edge and two locking holes 43a at the other edge.

In the housing portion 40A of this modification, the cover portion 43 is covered on the upper portion of the peripheral wall portion 42, so that the locking portions 44a of the peripheral wall portion 42 are locked in the locking holes 43a of the cover portion 43, respectively. Thereby, the cover 43 is assembled to the upper portion of the peripheral wall 42, and the storage space S is closed by the cover 43.

In the case of the housing portion 40A, when the nuts 49 are insufficiently fastened to the stud bolts 48, the end surfaces of the engagement walls 52 of the cover portion 43 come into contact with the nuts 49 when the nuts 49 are lifted. Therefore, the lid portion 43 cannot be assembled to the peripheral wall portion 42, and a connection failure between the wire connection portion 22 of the bus bar 10 and the terminal fitting 24 of the wire 23 can be detected. In particular, in the housing portion 40A, since the end face of the engagement wall 52 of the cover portion 43 hits the nut 49 and the cover portion 43 is separated from the peripheral wall portion 42, it is possible to more accurately detect a connection failure between the wire connection portion 22 of the bus bar 10 and the terminal fitting 24 of the wire 23.

Fig. 11 is a perspective view of a housing portion according to a second modification. Fig. 12 is a side view of a housing portion according to a second modification. Fig. 13 is a side view of a housing portion of the second modification.

As shown in fig. 11 and 12, the case 30 of the second modification is provided with a wire drawing guide 84 protruding from the end wall portion 45 in the extending direction of the wire 23, and the wire 23 can be fixed to the wire drawing guide 84 using the bundling belt 80.

The binding belt 80 has a belt portion 82 and a head portion 81, and the head portion 81 is provided with an engagement claw, not shown, which is inserted through the belt portion 82 and prevents movement in the return direction. The lead-out guide 84 has a curved surface portion 86 bundled together with the electric wire 23 by the belt portion 82 of the bundling belt 80, and end

portions

87, 88 formed at both ends of the curved surface portion 86. The

end portions

87 and 88 are formed with through holes that pass through the band 82 toward the electric wire side and are smaller than the head portion 81 of the bundling band 80. Therefore, when the bundling belt 80 rotates in the outer circumferential direction of the electric wire 23, the head 81 abuts against the side surface 87a of the end 87 or the side surface 88a of the end 88, and movement in the rotation direction is restricted.

The binding band 80 may move along the outer circumference of the electric wire 23 due to vibration of the vehicle. Therefore, as shown in fig. 13, when the other member 90 is provided in the vicinity of the wire drawing guide 84, if the movement of the head 81 is not restricted, there is a possibility that the head 81 interferes with the other member 90, but in the case 30 of the second modification, the head 81 abuts against the side surface 88a of the end 88 and does not move any further, so that the head 81 can be prevented from interfering with the other member 90.

In the above embodiment, the bus bar 10 is passed through the ferrite 71 together with the electric wires 60 so that the width direction is along the arrangement direction of the electric wires 60, however, as shown in fig. 14, the bus bar 10 may be passed through the ferrite 71 so that the width direction is orthogonal to the arrangement direction of the electric wires 60. In this case, in a state where the bus bar 10 and the electric wires 60 are mounted on the vehicle so that the arrangement direction thereof is in the horizontal direction, even when vibration in the up-down direction of the vehicle is applied, the displacement of the bus bar 10 due to the vibration can be suppressed, and the bus bar 10 can be arranged in a stable state.

The present invention is not limited to the above embodiment, and can be modified and improved as appropriate. The material, shape, size, number, arrangement position, and the like of the respective constituent elements in the above embodiment are not limited to any particular ones as long as the present invention can be realized.

The features of the embodiments of the wiring structure of the present invention described above will be briefly described as [1] to [7] below.

[1] A wiring structure is a wiring structure of a wiring member (100) connected to an electrical connection box (1), wherein,

the wiring member (100) is provided with:

an electric wire (60);

a plate-shaped bus bar (10) at least a part of which is covered by a housing (30);

an annular ferrite (71), through which ferrite (71) the electric wire (60) and the bus bar (10) pass adjacently,

the bus bar (10) has:

a connection part (terminal connection part 21) connected to the electric connection box (1);

a parallel wiring section (10A) passing through the ferrite (71),

the bus bar is bent between the connection portion (terminal connection portion 21) and the parallel wiring portion (10A) at least at one position along the arrangement direction of the electric wires (60).

According to the wiring structure of the above-described [1], since the bus bar and the electric wire pass through the annular ferrite, generation of noise when a current flows through the bus bar and the electric wire can be suppressed by the ferrite.

In addition, the bus bar is bent at least at one position along the arrangement direction of the wires between the connection portion connected to the electric connection box and the parallel wiring portion passing through the ferrite. Therefore, the bus bar can be smoothly guided from the connection portion with the electric connection box to the ferrite adjacent to the electric wire. Therefore, a plurality of wiring materials composed of wires and bus bars can be easily wired to the electrical junction box through the annular ferrite.

[2] The wiring structure as described in the above [1], wherein,

the bus bar (10) is fastened with a terminal metal piece (24) by a fastener (a nut 49) at the end part of the opposite side of the connecting part (the terminal connecting part 21) of the electric connection box (1),

the housing (30) is provided with a receiving portion (40), the receiving portion (40) is provided with a receiving space (S) for receiving the connection part of the bus bar (10) and the terminal metal piece (24),

the storage unit (40) is provided with:

a peripheral wall (42) surrounding the storage space (S);

and a cover (43) which is assembled on the upper part of the peripheral wall (42) and opens and closes the storage space (S).

According to the wiring structure of the above-described [2], the connection portion between the bus bar and the terminal fitting can be stored and protected in the storage space of the storage portion. Further, by opening the lid portion, the connection portion between the bus bar and the terminal fitting in the storage space can be visually checked, and the presence or absence of the fastener and the connection state can be confirmed.

[3] The wiring structure as described in the above [2], wherein,

the cover (43) is rotatably provided with respect to the peripheral wall (42), and has an engagement wall (52), and the engagement wall (52) is disposed at a position opposite to the fastener (nut (49)) without a gap in a state where the storage space (S) is closed.

According to the wiring structure of the above [3], the engaging wall is disposed at a position opposed to the fastener without a gap in a state where the cover is turned to close the accommodating space. Therefore, when the fastener loosens and floats, the engagement wall hits the fastener, and the cover portion cannot be closed, whereby a connection failure between the bus bar and the terminal fitting can be detected. In addition, since the cover portion is rotatably provided on the peripheral wall portion, the number of components can be reduced.

[4] The wiring structure as described in the above [2], wherein,

the cover (43) is detachable from the peripheral wall (42) and has an engagement wall (52), and the engagement wall (52) is disposed at a position opposite to the fastener (nut (49)) without a gap in a state where the storage space (S) is closed.

According to the wiring structure of the above [4], the engaging wall is disposed at a position opposed to the fastener without a gap in a state where the lid is assembled to the peripheral wall portion to close the storage space. Therefore, when the fastener is loosened and lifted, the engagement wall hits the fastener, and the cover portion is detached from the peripheral wall portion, whereby it is possible to detect a poor connection between the bus bar and the terminal fitting of the electric wire.

[5] The wiring structure according to any one of the above [1] to [4], wherein,

the width direction of the parallel wiring sections (10A) of the bus bar (10) is along the arrangement direction of the wires (60).

According to the wiring structure of the above-described [5], by wiring the wiring member into the vehicle so that the arrangement direction of the bus bar and the electric wire is a horizontal direction, the wiring member can be smoothly wired in a narrow wiring space of the vehicle in which the height is limited while suppressing an increase in height.

[6] The wiring structure according to any one of the above [1] to [4], wherein,

the width direction of the parallel wiring sections (10A) of the bus bar (10) is orthogonal to the arrangement direction of the wires (60).

According to the wiring structure of the above-described [6], by wiring the wiring member into the vehicle so that the arrangement direction of the bus bar and the electric wire is the horizontal direction, even when vibration in the up-down direction of the vehicle is applied, displacement of the bus bar due to the vibration can be suppressed, and the wiring member can be arranged in a stable state.

[7] The wiring structure as described in the above [2], wherein,

the housing part (40) is provided with a wire drawing guide (84) protruding from the peripheral wall part (45) in the extending direction of the wire (23),

the wire drawing guide (84) has: a curved surface portion (86) bundled together with the electric wire (23) by a belt portion (82) of the bundling belt (80), and two end portions (87, 88) formed at both ends of the curved surface portion (86) and restricting movement of a head portion (81) of the bundling belt (80).

According to the wiring structure of the above-mentioned [7], the head portion of the binding band abuts against the side surface of the end portion of the wire drawing guide without further movement. Therefore, even if other members are present in the vicinity of the wire drawing guide, interference of the head with the other members can be prevented.

Claims

1. A wiring structure of a wiring member connected to an electrical connection box, characterized in that,

the wiring member includes:

an electric wire;

a plate-shaped bus bar, at least a part of which is covered with the housing,

the bus bar has:

a connection part connected to the electrical connection box;

2. The wiring structure as in claim 1, wherein,

the bus bar is fastened with a terminal metal piece at an end opposite to a connection portion of the electric connection box by a fastener,

the housing includes a housing portion having a housing space for housing a connection portion between the bus bar and the terminal fitting,

the storage section is provided with:

a peripheral wall portion surrounding the periphery of the storage space;

and a cover part which is assembled on the upper part of the peripheral wall part and opens and closes the storage space.

3. The wiring structure as claimed in claim 2, wherein,

the cover portion is provided rotatably with respect to the peripheral wall portion, and has an engagement wall that is disposed at a position opposite to the fastener without a gap in a state where the receiving space is closed.

4. The wiring structure as claimed in claim 2, wherein,

the cover portion is detachable from the peripheral wall portion, and has an engagement wall that is disposed at a position opposite to the fastener without a gap in a state where the storage space is closed.

5. The wiring structure as claimed in any one of claims 1 to 4, wherein,

the bus bar has a width direction of the parallel wiring sections along an arrangement direction of the wires.

6. The wiring structure as claimed in any one of claims 1 to 4, wherein,

the width direction of the parallel wiring portions of the bus bars is orthogonal to the arrangement direction of the electric wires.

7. The wiring structure as claimed in claim 2, wherein,

the housing portion is provided with a wire drawing guide protruding from the peripheral wall portion in the extending direction of the wire,

the wire drawing guide has: a curved surface portion which is bundled together with the electric wire by a belt portion of a bundling belt; and two end portions formed at both ends of the curved portion to restrict movement of the head portion of the binding band.