CN101478129B - electrical junction box - Google Patents

Abstract

The present invention provides an electrical junction box capable of improving the workability of attaching a bus bar to a current detection unit and effectively preventing wrong attachment of a bus bar to the current detection unit. Make the bus bar (70) placed on the bottom surface (82) of the bus bar temporary placement recess (80) slide along the bus bar insertion path (85) to the through hole (182) of the current sensor (180) and pass through the through hole (182) , and when the second end portion (74) is in contact with the contact wall (45), the two busbar insertion paths (85) that form the first contact piece accommodation recess (20) and the second contact piece accommodation recess (40) respectively The walls (21, 41) limit the movement of the bus bar (70) in the width direction, and at the same time, make the first screw fixing hole (73) of the first end (72) penetrate the first screw of the first contact piece (32) The holes (31) are aligned, and the second screw fixing hole (75) of the second end portion (74) is aligned with the second screw insertion hole (51) of the second contact piece (52).

Description

electrical junction box

[technical field]

The present invention relates to an electrical junction box (i.e., an electronic connection assembly) such as a relay box, a fuse box, and an electronic control unit box for electrically connecting a battery to various electrical equipment on vehicles such as automobiles, and more specifically, The present invention relates to an electrical junction box provided with a current detection section having a bus bar and a current sensor that detects a current flowing through the bus bar.

[Background technique]

Conventionally, there have been proposed various electrical junction boxes provided with a current detection section having a bus bar and detecting a current flowing through the bus bar (for example, see Patent Document 1).

Among such various electrical junction boxes, there is a junction box that is provided with a junction box main body that can be fixed on the surface to be installed on the vehicle body panel, and in the junction box main body as its upper surface, a fuse, a relay, and other electrical components are installed. An electrical component mounting surface, and a current detection unit provided on the electrical component mounting surface.

The current detecting portion is cut away from the conventional electrical junction box and the junction box main body having such a structure and is shown in FIGS. 7 to 10 . Fig. 7 is an exploded perspective view showing the bus bar and current sensor assembly separated from the current detection section, Fig. 8 is a front view of the current detection section in the state where the bus bar and current sensor assembly are removed, and Fig. 9 is a view showing the bus bar and current sensor assembly installed The front view of the current detection unit in the state of the sensor assembly, FIG. 10 is a front view of the current detection unit fixed by bolts in the state where the terminal is in contact with the bus bar.

As shown in FIG. 7 and FIG. 8, a first contact piece sodium-accommodating recess 120 made of synthetic resin and a second contact piece sodium-accommodating recess 140 made of synthetic resin are formed in the current detection part 110, which is a part of the main body of the junction box. .

The first contact member 130 made of conductive metal provided in the main body of the junction box has a first contact piece 132 formed with a first screw insertion hole 131, and the first contact piece 132 is arranged in the sodium-accommodating recess of the first contact piece Within 120.

In addition, the second contact member 150 made of conductive metal provided in the main body of the junction box has a second contact piece 152 forming a second screw insertion hole 151, and the second contact piece 152 is provided in the second contact piece receiving recess. Within 140.

The current detection unit 110 is provided with a current sensor housing chamber 160 made of synthetic resin. The current sensor accommodating chamber 160 is disposed between the first contact piece accommodating recess 120 and the second contact piece accommodating recess 140 and opens upward.

The current detection unit 110 is further provided with a bus bar 170 made of a conductive metal as a conductor for current detection. The bus bar 170 has a plate-shaped bus bar main body 171, and a first screw fixing hole 173 penetrating through the thickness direction is formed on the first end 172 of one of the two ends of the bus bar main body 171 in the length direction, and, on the bus bar main body A second screw fixing hole 175 penetrating through the thickness direction is provided on the second end portion 174 of the other of the two end portions in the length direction of 171 .

The current detection unit 110 is further provided with a current sensor 180 . The current sensor 180 has a sensor main body 181 and through holes 182 formed to penetrate both sides of the sensor main body 181 .

As shown in FIGS. 7 and 9 , the current sensor 180 is inserted into the current sensor housing chamber 160 from the upper side of the junction box main body with the bus bar 170 passing through the through hole 182 so that the through holes on both sides of the sensor main body 181 One of the openings of the openings 182 faces the first contact piece sodium accommodation recess 120 side, and the other of the openings of the through hole 182 faces the second contact piece accommodation recess 140 side.

Afterwards, the operator aligns the first screw fixing hole 173 of the first end 172 of the bus bar 170 with the first screw insertion hole 131 of the first contact piece 132, and at the same time, aligns the second screw hole 173 of the second end 174 of the bus bar 170. The screw fixing holes 175 are aligned with the second screw insertion holes 151 of the second contact piece 152 .

In such a state, as shown in FIG. The first nut (not shown) below is threaded, so that the first end 172 of the bus bar 170 is fastened on the current detection part 110, so as to maintain the first end 172 of the bus bar 170 and the first contact piece 132. contact status.

On the other hand, as shown in FIG. 10 , the threaded portion of the second bolt (second screw) 205 passing through the second screw fixing hole 175 and the second screw insertion hole 151 is arranged under the second contact piece 152. The second nut (not shown) of the bus bar 170 is screwed together, so that the second end 174 of the bus bar 170 is fastened in the current detection part 110, so as to maintain the contact between the second end 174 of the bus bar 170 and the second contact piece 152 contact status. At this time, the terminal 220 made of conductive metal that is electrically connected to the conductor of the wire terminal portion 210 electrically connected to the battery (not shown) also passes through the second bolt 205 passing through the screw hole (not shown), It is fastened together with the second end portion 174 in the current detection portion 110 in a state of being in contact with the second end portion 174 of the bus bar 170 .

In addition, the first bolt 200 and the second bolt 205 have screw portions having different diameters. Specifically, the first bolt 200 is an M5 bolt, and the second bolt 205 is an M6 bolt whose diameter is larger than the thread portion of the first bolt 200 . It goes without saying that the first nut (not shown) and the second nut (not shown) also correspondingly have threaded portions with different diameters.

Therefore, the diameter of the first screw fixing hole 173 of the busbar 170 corresponds to the diameter of the threaded part of the first bolt 200, and the diameter of the second screw fixing hole 175 of the busbar 170 corresponds to the diameter of the threaded part of the second bolt 205 and larger than the diameter of the first screw fixing hole 173 .

Similarly, the diameter of the first screw insertion hole 131 of the first contact piece 132 also corresponds to the diameter of the threaded portion of the first bolt 200, and the diameter of the second screw insertion hole 151 of the second contact piece 152 also corresponds to the diameter of the second screw insertion hole 151. The diameter of the threaded portion of the bolt 205 corresponds to and is greater than the diameter of the first screw insertion hole 131 .

As shown in FIG. 7 , for the current detection unit 110 in which the current sensor 180 in the state where the bus bar 170 passes through the through hole 182 is installed in the current sensor housing chamber 160 , it is considered that the bus bar 170 is placed in the thickness direction. For the convenience of embedding into the first contact piece receiving recess 120 and the second contact piece receiving recess 140 , usually larger gaps C1 , C2 , C3 are required as shown in FIG. 9 . In addition, the through hole 182 of the current sensor 180 is formed larger (that is, the cross-sectional area is larger than the cross-sectional area of the bus bar 170 in the width direction), so that the bus bar 170 will not come into contact with the sensor when the bus bar 170 is fastened to the current detection part 110. The surfaces of the main body 181 forming the through hole 182 are in contact with each other.

[Patent Document 1] Japanese Unexamined Patent Publication No. 2007-28773

[Content of the invention]

However, this convenience of embedding, that is, setting larger gaps C1, C2, C3 and making the through hole 182 of the current sensor 180 larger than the cross-sectional area of the bus bar 170 in the width direction will increase the The range that the bus bar 170 can move before the bolt 205 is threaded, which will lead to the alignment of the first screw fixing hole 173 of the bus bar 170 and the first screw insertion hole 131 of the first contact piece 132 and the second screw fixing of the bus bar 170 The workability of aligning the hole 175 with the second screw insertion hole 151 of the second contact piece 152 deteriorates.

In addition, since the size of the first screw fixing hole 173 and the second screw fixing hole 175 of the busbar 170 are different, the current sensor 180 is installed in the current sensor sodium chamber 160 under the condition that the busbar 170 passes through the through hole 182. Sometimes it may happen that their positions are reversed by mistake, especially when the second bolt 205 is threaded, the operator may find out the mistake and reinstall it. Therefore, there is a need for improvement.

In view of the above circumstances, an object of the present invention is to provide an electrical junction box capable of improving workability of attaching a bus bar to a current detection unit and effectively preventing wrong attachment of a bus bar to the current detection unit.

In order to achieve the above objects, the electrical junction box of the present invention has the following features (1) to (5).

(1) Electrical junction boxes, which are provided with:

junction box body,

The current detection part provided on the above-mentioned junction box main body,

the first contact-piece receiving recess and the second contact-piece receiving recess formed on the above-mentioned current detecting portion,

A first contact member made of conductive metal having a first contact piece formed with a first screw insertion hole and the first contact piece is provided on the junction box main body in such a manner as to be located in the first contact piece accommodation recess. middle;

A second contact member made of conductive metal having a second contact piece formed with a second screw insertion hole and the second contact piece is provided on the junction box main body in such a manner as to be located in the second contact piece accommodating recess. middle;

a current sensor accommodating chamber disposed between the first contact piece accommodating recess and the second contact piece accommodating recess;

A current sensor having a sensor main body and a through hole formed through the sensor main body, the current sensor is housed in the current sensor housing chamber such that one of the openings of the through hole on both sides of the sensor main body Facing the side of the first contact piece accommodation recess, the other of the openings of the through holes faces the side of the second contact piece accommodation recess;

A bus bar insertion path extending from the first contact piece in the first contact piece accommodation recess through the through hole of the current sensor to the second contact piece in the second contact piece accommodation recess;

a contact wall provided in the above-mentioned second contact piece accommodating recess in such a manner as to form a terminal end of the above-mentioned bus bar insertion path;

A bus bar made of conductive metal for current detection, which has a plate-shaped bus bar body, and a first screw fixing hole penetrating in the thickness direction is formed on the first end portion of one of the two end portions in the length direction of the bus bar body, In addition, a second screw fixing hole penetrating through the thickness direction is formed on the second end of the other of the two ends of the main body of the bus bar in the length direction; and

The busbar temporary placement recess is provided in connection with the above-mentioned first contact piece accommodation recess, and forms a busbar sliding path aligned with the above-mentioned busbar insertion path, the busbar temporary placement recess has a bottom surface that can temporarily place the above-mentioned busbar, and at the same time, restricting the sliding direction of the bus bar on the bottom surface to the length direction of the bus bar,

The electrical junction box detects the current flowing in the above-mentioned bus bar through the above-mentioned current sensor, wherein:

The bus bar placed on the bottom surface of the bus bar temporary storage recess slides along the bus bar insertion path toward the through hole of the current sensor and passes through the through hole, and when the second end portion contacts the contact wall, passes through the through hole of the current sensor. The two walls forming the insertion path of the bus bar of the first contact piece accommodation recess and the second contact piece accommodation recess respectively restrict the movement of the bus bar in the width direction, and at the same time, make the first screw fixing hole of the first end part and the first screw fixing hole. The first screw insertion hole of the first contact piece is aligned, and the second screw fixing hole of the second end is aligned with the second screw insertion hole of the second contact piece,

fastening the first end portion on the current detection portion so as to keep the first end portion of the bus bar in contact with the first contact with the first screw passing through the first screw fixing hole and the first screw insertion hole the state of contact between the pieces,

fastening the second end portion on the current detecting portion so as to keep the second end portion of the bus bar in contact with the second screw through the second screw passing through the second screw fixing hole and the second screw insertion hole The state of contact between the sheets.

(2) In the electrical junction box having the structure of (1) above, the first screw and the second screw have screw portions having different diameters,

The diameter of the first screw fixing hole of the above-mentioned bus bar corresponds to the diameter of the threaded part of the above-mentioned first screw,

The diameter of the second screw fixing hole of the above-mentioned busbar corresponds to the diameter of the threaded part of the above-mentioned second screw,

The first end portion of the bus bar has a portion having a width greater than that of the second end portion,

At least one of the two walls of the first contact-piece receiving recess is formed with a bus bar misinsertion preventing portion protruding in the width direction of the bus bar in the bus bar insertion path,

When the first end of the bus bar is on the front side in the direction of sliding travel and the bottom surface of the temporary housing recess for the bus bar slides toward the through hole, the first end comes into contact with the wrong insertion prevention part of the bus bar to prevent it. Enter the above busbar insertion path.

(3) In the electrical junction box having the configuration of (1) or (2) above, the current detection unit is formed on the upper surface of the junction box main body,

The current sensor storage chamber communicates with the lower opening of the junction box main body, and extends upward from between the first contact piece storage recess and the second contact piece storage recess, and at the same time, faces the opening of the first contact piece storage recess. The side wall and the side wall facing the second contact piece accommodating recess respectively have openings,

The current sensor is such that one of the openings of the through-holes on both side surfaces of the sensor body faces the side of the first contact piece accommodating recess and the other of the openings of the through-hole faces the side of the second contact piece accommodating recess. In this way, insert it into the current sensor housing chamber from the lower surface side of the junction box main body.

(4) In the electrical junction box having the configuration of (3) above, a confirmation window for exposing the upper surface of the current sensor is formed on the upper wall of the current sensor housing chamber.

(5) In the electrical junction box having any one of the above (1) to (4), the terminal made of conductive metal electrically connected to the conductor of the terminal portion of the electric wire electrically connected to the battery is passed through the screw hole The second screw is fastened to the current detection part in a state of being in contact with the second end part.

In the electrical junction box having the structure of (1) above, the main body of the junction box is provided with a bus bar temporary placement recess, and the bus bar temporary placement recess is provided in connection with the first contact piece accommodation recess and formed to be aligned with the bus bar insertion path At the same time, the sliding direction of the busbar on the bottom surface is limited to the length direction of the busbar. The bus bar placed on the bottom surface of the bus bar temporary placement recess is slidably moved along the bus bar insertion path toward the through hole of the current sensor and passed through the through hole, and when the second end portion is in contact with the contact wall, the recess is accommodated by the first contact piece The two walls forming the bus bar insertion path respectively with the second contact piece accommodating recess limit the movement of the width direction of the bus bar, and at the same time, make the first screw fixing hole of the first end part and the first screw insertion hole of the first contact piece Align, and align the second screw fixing hole at the second end with the second screw insertion hole of the second contact piece. Therefore, the electrical junction box having the structure of (1) above can improve the workability of the work of attaching the bus bar to the current detection unit.

In the electrical junction box having the structure of (2) above, the first end portion of the bus bar has a portion having a width larger than that of the second end portion, and in both walls of the first contact piece accommodating recess forming the bus bar insertion path At least one busbar misinsertion prevention part is formed on the busbar insertion path to protrude in the width direction of the busbar, so that when the first end of the busbar is at the front side of the sliding travel direction and makes it face the current on the bottom surface of the busbar temporary placement recess When the through hole of the sensor is slidably moved, the first end of the bus bar contacts the bus bar wrong insertion prevention part, thereby preventing it from entering the bus bar insertion path. Therefore, the electrical junction box having the structure of (2) above can effectively prevent erroneous operation of attaching the bus bar to the current detection portion.

In the electrical junction box having the structure of (3) above, the current sensor accommodating chamber has openings on both side walls facing the first contact piece accommodating recess and side walls facing the second contact piece accommodating recess. The openings on the two side walls are provided for the bus bar to be smoothly inserted into the through hole of the current sensor. In addition, in the electrical junction box having the structure of (3) above, the current sensor is such that one of the openings of the through-holes on both sides of the sensor main body faces toward the side of the first contact piece accommodating recess, and is in the opening of the above-mentioned through-hole. The other way of facing the second contact piece accommodating recess is inserted into the current sensor accommodating chamber from the opening on the bottom surface of the junction box main body. Therefore, compared with the conventional electric junction box in which an opening must be opened between the first contact piece accommodation recess and the second contact piece accommodation recess in order to insert the current sensor into the current sensor sodium accommodation chamber from the upper side of the junction box main body, In the electrical junction box having the structure of (3) above, the mechanical strength of the current detection unit can be improved.

In the electrical junction box having the structure of (4) above, since the current sensor accommodating chamber has the upper wall forming the confirmation window for exposing the upper surface of the current sensor, it can be confirmed through the confirmation window whether the current sensor accommodating chamber is accommodating or not. There is a current sensor.

In the electrical junction box having the structure of (5) above, since the terminal made of conductive metal electrically connected to the conductor of the terminal portion of the electric wire electrically connected to the battery passes through the second screw inserted into the screw hole thereof, it is connected with the Since the second end of the bus bar is fastened to the current detection unit in a state of being in contact, electric power can be supplied from the battery.

[Invention effect]

According to the present invention, the operability of the work of attaching the bus bar to the current detection unit can be improved, and it is possible to effectively prevent wrong attachment of the bus bar to the current detection unit.

In the above, the present invention has been briefly described. The details of the present invention will be further understood by reading through the following description of the best modes for carrying out the invention with reference to the accompanying drawings.

[Description of drawings]

FIG. 1 shows one embodiment of the electrical junction box of the present invention, which is a plan view showing a junction box main body of an electrical component mounting portion of the electrical junction box and terminals with electric wires.

Fig. 2 is an exploded perspective view showing a state before a bus bar and a current sensor are mounted on a current detection section.

Fig. 3 is a plan view of the current detecting section showing a direction in which a bus bar is inserted into the current detecting section equipped with a current sensor.

Fig. 4 is a plan view of the current detection unit in a state where the bus bar is placed on the bottom surface of the bus bar temporary placement recess.

Fig. 5 shows the state of the current detection part when the busbar slides along the busbar insertion path toward the through hole of the current sensor from the state shown in Fig. 4 and passes through the through hole and makes the second end contact with the contact wall. In other words, it means that the movement of the busbar in the width direction is restricted by the two walls of the first contact piece accommodating recess and the second contact piece accommodating recess respectively forming the busbar insertion path, and at the same time, the first screw at the first end of the busbar is fixed A top view of the current detection part in a state where the hole is aligned with the first screw insertion hole of the first contact piece and the second screw fixing hole of the second end of the bus bar is aligned with the second screw insertion hole of the second contact piece.

Fig. 6 shows the state of the current detection part when the first end of the bus bar is at the front side of the sliding travel direction and slides toward the through hole of the current sensor on the bottom surface of the bus bar temporary placement recess, and more specifically, it shows A plan view of the current detection unit in a state where the first end portion of the bus bar is in contact with the bus bar wrong insertion prevention unit to prevent it from entering the bus bar insertion path.

Fig. 7 is an exploded perspective view showing the bus bar and current sensor assembly separated from the current detection section.

Fig. 8 is a front view of a current detection unit in a state where a bus bar and a current sensor assembly are removed.

Fig. 9 is a front view of the current detection part in the state where the bus bar and the current sensor assembly are installed.

Fig. 10 is a front view of the current detection unit fixed by bolts in a state where the terminals are in contact with the bus bar.

[Description of Reference Signs]

1: Electrical junction box

2: Junction box main body

10: Current detection unit

20: First contact piece receiving recess

21: two walls

31: The first screw through hole

32: first contact piece

40: Second contact piece accommodation recess

41: two walls

45: contact wall

51: Second screw through hole

52: Second contact piece

70: busbar

72: first end

73: The first screw fixing hole

74: second end

75: Second screw fixing hole

80: Temporary placement of the busbar in the recess

82: bottom surface

85: Bus insertion path

180: current sensor

182: through hole

[Detailed ways]

Hereinafter, the best embodiment of the present invention will be described in detail with reference to the accompanying drawings. Fig. 1 has shown a kind of implementation form (electrical junction box 1) of the electrical junction box of the present invention, and it is the junction box main body and the terminal that have electric wire of the electrical part installation portion of showing electrical junction box, and Fig. 2 is shown An exploded perspective view of the state before the bus bar and the current sensor are installed in the current detection section, Fig. 3 is a top view of the current detection section showing the direction in which the bus bar is inserted into the current detection section equipped with the current sensor, and Fig. 4 is a state where the bus bar is placed A plan view of the current detection unit in a state where the bus bar is temporarily placed on the bottom surface of the recess.

Fig. 5 shows the state of the current detection part when the busbar slides along the busbar insertion path toward the through-hole of the current sensor from the state shown in Fig. 4 and passes through the through-hole and makes the second end contact with the contact wall. In other words, it means that the movement of the busbar in the width direction is restricted by the two walls of the first contact piece accommodation recess and the second contact piece accommodation recess respectively forming the busbar insertion path, and at the same time, the first screw at the first end of the busbar is fixed A plan view of the current detection part in a state where the hole is aligned with the first screw insertion hole of the first contact piece and the second screw fixing hole of the second end of the bus bar is aligned with the second screw insertion hole of the second contact piece.

Fig. 6 shows the state of the current detection part when the first end of the bus bar is at the front side of the sliding travel direction and slides toward the through hole of the current sensor on the bottom surface of the bus bar temporary placement recess, and more specifically, it shows A plan view of the current detection unit in a state where the first end portion of the bus bar is in contact with the bus bar wrong insertion prevention unit to prevent it from entering the bus bar insertion path.

As shown in Figure 1, the electrical junction box 1 is in the form of detecting the current flowing in the busbar through a current sensor, and it is provided with a junction box main body 2 that can be fastened and fixed on the vehicle body panel through a locking device, as a set on it. In the junction box main body 2 , an electrical component mounting surface 5 , on which plug-in electrical components such as a blade fuse 3 and a relay 4 are mounted, and a current detection unit 10 provided on the electrical component mounting surface 5 .

As shown in FIGS. 1 to 3 , in the current detecting portion 10 formed on the upper surface of the terminal box main body 2 , that is, in the current detecting portion 10 forming a part of the terminal box main body 2 , a first contact piece receiving recess made of synthetic resin is formed. 20 and a second contact piece accommodating recess 40 made of synthetic resin.

As shown in Fig. 3, the first contact member 30 made of conductive metal that is arranged in the junction box main body 2 has a first contact piece 32 formed with a first screw insertion hole 31, and the first contact piece 32 is set In the first contact piece accommodating recess 20 .

In addition, as shown in FIG. 3 , the second contact member 50 made of conductive metal provided in the junction box main body 2 has a second contact piece 52 formed with a second screw insertion hole 51 , and the second contact piece 52 It is provided in the second contact piece accommodating recess 40 .

The current detection unit 10 is provided with a current sensor housing chamber 60 made of synthetic resin. The current sensor accommodating chamber 60 is disposed between the first contact piece accommodating recess 20 and the second contact piece sodium accommodating recess 40 .

In more detail, the current sensor sodium holding chamber 60 communicates with the lower opening of the junction box main body 2, and, as shown in FIG. At the same time, the sidewall 61 facing the first contact piece receiving recess 20 and the sidewall 62 facing the second contact piece receiving recess 40 both have openings. In addition, a confirmation window 65 is formed on the upper wall of the current sensor housing chamber 60 .

The current detection section 10 is also provided with a current sensor 180 housed in the current sensor housing chamber 60 . The current sensor 180 is the same as the current sensor described with reference to FIGS. 7 to 10 , and has a sensor body 181 and a through hole 182 passing through the sensor body 181 as shown in FIG. 2 .

The current sensor 180 is inserted into the current sensor accommodating chamber 60 from the lower side of the junction box main body 2 so that one of the openings of the through holes 182 on both sides 183, 184 of the sensor main body 181 faces the first contact piece accommodating recess 20 side, The other opening of the through hole 182 is toward the second contact piece accommodation recess 40 side. In addition, a confirmation window 65 exposing the upper surface 185 of the housed current sensor 180 is formed on the upper wall of the current sensor housing chamber 60 .

As shown in FIG. 2 and FIG. 3 , the through hole 182 passing through the current sensor 180 on the first contact piece 32 in the first contact piece accommodation recess 20 is formed in the current detection part 10 and extends into the second contact piece accommodation recess 40 The bus bar on the second contact piece 52 is inserted into the path 85 . In addition, a contact wall 45 forming a terminal of this bus bar insertion path 85 is provided in the second contact piece accommodating recess 40 .

The current detection unit 10 further includes a bus bar 70 made of a conductive metal as a conductor for current detection. The busbar 70 has a plate-shaped busbar main body 71, and a first screw fixing hole 73 penetrating through the thickness direction is provided on the first end 72 of one of the two ends of the busbar main body 71 in the longitudinal direction, and, on the busbar main body The second end 74 of the other of the two ends in the length direction of 71 is provided with a second screw fixing hole 75 penetrating in the thickness direction.

The current detection unit 10 is also provided with a temporary busbar placement recess 80 connected to the first contact piece accommodation recess 20 . As shown in FIG. 3 , the busbar temporary placement recess 80 is formed with a busbar sliding path 81 aligned with the busbar insertion path 85 , and has a bottom surface 82 on which the busbar 70 can be temporarily placed. It extends and restricts the sliding direction of the bus bar 70 on the bottom surface 82 to the two sides 83 , 83 in the length direction of the bus bar 70 .

After the current sensor 180 is inserted from the opening below the junction box main body 2 and accommodated in the current sensor accommodation chamber 60, the bus bar 70 is installed in the current detection part 10 in the following manner.

That is, as shown in FIG. 4 , the bus bar 70 placed on the bottom surface 82 of the bus bar temporary housing recess 80 slides toward the through hole 182 of the current sensor 180 along the bus bar insertion path 85 .

After that, as shown in FIG. (More specifically, bus bar mis-insertion prevention parts 25 and 25 ) and two walls 41 and 41 of the second contact piece receiving recess 40 that form the bus bar insertion path 85 restrict movement of the bus bar 70 in the width direction.

At this time, the first screw fixing hole 73 of the first end 72 is aligned with the first screw insertion hole 31 of the first contact piece 32, and the second screw fixing hole 75 of the second end 74 is aligned with the second contact. The second screw insertion hole 51 of the sheet 52 is aligned.

In this state, the threaded portion of the first bolt 200 (see FIG. 10 ) passing through the first screw fixing hole 73 and the first screw insertion hole 31 and the first nut provided under the first contact piece 32 (not shown) fastens the first end 72 of the bus bar 70 on the current detection part 10 so as to maintain the contact state between the first end 72 of the bus bar 70 and the first contact piece 32 .

On the other hand, the threaded portion of the second bolt 205 (see FIG. 10 ) passed through the second screw fixing hole 75 and the second screw insertion hole 51 and the second nut (not shown) provided under the second contact piece 52 shown) to fasten the second end 74 of the bus bar 70 on the current detection part 10 so as to maintain the contact state between the second end 74 of the bus bar 70 and the second contact piece 52 . At this time, the conductive metal terminal 220 (see FIGS. 1 and 10 ) that is electrically connected to the conductor of the wire terminal portion 210 electrically connected to the battery (not shown) also passes through the screw hole (not shown). The second bolt 205 is fastened to the current detection unit 10 together with the second end portion 74 in a state of being in contact with the second end portion 74 of the bus bar 70 .

In addition, as described above, the first bolt 200 and the second bolt 205 have threaded portions having different diameters. Specifically, the first bolt 200 is an M5 bolt, and the second bolt 205 is an M6 bolt having a threaded portion having a diameter larger than that of the first bolt 200 . It goes without saying that the first nut (not shown) and the second nut (not shown) also correspondingly have female thread portions with different diameters.

Therefore, the diameter of the first screw fixing hole 73 of the bus bar 70 corresponds to the diameter of the threaded portion of the first bolt 200, and the diameter of the second screw fixing hole 75 of the bus bar 70 corresponds to the diameter of the threaded portion of the second bolt 205. , and larger than the diameter of the first screw fixing hole 73 .

Similarly, the diameter of the first screw insertion hole 31 of the first contact piece 32 also corresponds to the diameter of the threaded part of the first bolt 200, and the diameter of the second screw insertion hole 51 of the second contact piece 52 also corresponds to the diameter of the second screw insertion hole 51. The diameter of the threaded portion of the bolt 205 corresponds to and is larger than the diameter of the first screw insertion hole 31 .

In addition, the first end portion 72 of the busbar 70 has a portion 76 having a width greater than that of the second end portion 74 (in this embodiment, the large width portions 76 and 76 are separated by two widths from the width direction of the first end portion 72 set in such a way that the sides protrude).

In addition, in at least one of the two walls 21, 21 of the first contact piece accommodating recess 20, a bus bar insertion preventing portion 25 protruding in the width direction of the bus bar 70 in the bus bar insertion path 85 (in this embodiment, a bus bar wrong insertion prevention portion 25 is provided). Insertion preventing portions 25 , 25 are provided on the inner surfaces of both walls 21 , 21 of the first contact piece accommodating recess 20 ).

With this structure, as shown in FIG. 6 , when the first end 72 of the bus bar 70 is placed on the front side of the sliding travel direction and slides toward the through hole 182 on the bottom surface 82 of the bus bar temporary placement recess 80 , the first end The portion 72 will come into contact with the bus bar misinsertion preventing portion 25 , thereby preventing it from entering the bus bar insertion path 85 .

In the electrical junction box 1 having the above-mentioned structure, the junction box main body 2 is provided with a busbar temporary placement recess 80 which is provided in connection with the first contact piece accommodating recess 20 to form a busbar sliding path aligned in such a manner as to be connected to the busbar insertion path 85 81 , at the same time, the sliding direction of the bus bar 70 on the bottom surface 82 is limited to the length direction of the bus bar 70 .

When the bus bar 70 placed on the bottom surface 82 of the bus bar temporary placement recess 80 slides along the bus bar insertion path 85 toward the through hole 182 of the current sensor 180 and passes through the through hole 182, and the second end portion 74 contacts the contact wall 45, The two walls 21, 41 of the bus bar insertion path 85 are respectively formed by the first contact piece accommodation recess 20 and the second contact piece accommodation recess 40, so that the movement of the bus bar 70 in the width direction is restricted, and at the same time, the first screw of the first end portion 72 The fixing hole 73 is aligned with the first screw insertion hole 31 of the first contact piece 32 , and the second screw fixing hole 75 of the second end portion 74 is aligned with the second screw insertion hole 51 of the second contact piece 52 .

In this way, the electrical junction box 1 having the above-mentioned structure can improve the workability when the bus bar 70 is attached to the current detection unit 10 .

In addition, in the electrical junction box 1 having the above structure, the first end portion 72 of the bus bar 70 has a portion 76 having a width greater than that of the second end portion 74, and both ends of the bus bar insertion path 85 are formed in the first contact piece accommodating recess 20. At least one wall of the two walls 21 is provided with a bus bar misinsertion preventing portion 25 that protrudes toward the width direction of the bus bar 70 in the bus bar insertion path 85. When the bottom surface 82 of the temporary placement recess 80 slides toward the through hole 182 of the current sensor 180 , the first end 72 of the bus bar 70 will abut against the bus bar wrong insertion preventing portion 25 , thereby preventing it from entering the bus bar insertion path 85 .

Therefore, the electrical junction box 1 having the above-mentioned structure can effectively prevent wrong assembly of the bus bar 70 to the current detection unit 10 .

In addition, in the electrical junction box 1 having the above structure, the side wall 61 facing the first contact piece accommodating recess 20 and the side wall 62 facing the second contact piece accommodating recess 40 of the current sensor accommodating chamber 60 have openings respectively. The openings of the two side walls 61 , 62 are provided for smoothly inserting the bus bar 70 into the through hole 182 of the current sensor 180 .

In addition, in the electrical junction box 1 having the above-mentioned structure, the current sensor 180 is inserted into the current sensor accommodating chamber 60 from the opening below the junction box main body 2 so that One of the openings faces the first contact piece accommodating recess 20 side, and the other of the openings of the through hole 182 faces the second contact piece accommodating recess 40 side.

Therefore, unlike the conventional form in which an opening must be provided between the first contact piece accommodation recess 20 and the second contact piece accommodation recess 40 in order to insert the current sensor 180 into the current sensor accommodation chamber 60 from the upper surface side of the junction box main body 2 , Compared with the electrical junction box 1 , the electrical junction box 1 having the above structure can improve the mechanical strength of the current detection unit 10 .

In addition, in the electrical junction box 1 having the above-mentioned structure, since the current sensor housing chamber 60 has an upper wall on which the confirmation window 65 for exposing the upper surface 185 of the current sensor 180 is formed, it can be confirmed through the confirmation window 65 . Whether the current sensor 180 is housed in the current sensor housing chamber 60 or not.

In addition, in the electrical junction box 1 having the above-mentioned structure, since the conductive metal terminal electrically connected to the conductor of the terminal portion of the electric wire electrically connected to the battery is connected to the bus bar 70 through the second bolt 205 passing through the screw hole thereof, The second end portion 74 of the battery is fastened to the current detection unit 10 in a state where the second end portion 74 is in contact, so that electric power can be supplied from the battery.

According to the present invention, since it is possible to improve the operability of installing the busbar 70 on the current detection part 10, and it is possible to effectively prevent the wrong assembly of the busbar 70 on the current detection part 10, it can be applied to the use of batteries in vehicles such as automobiles. In electrical junction boxes such as relays, fuse boxes, and electronic control unit boxes that are electrically connected to various electronic components.

In addition, the present invention should not be limited to the above-described embodiments, and appropriate modifications, improvements, and the like can be made to the present invention. In addition, the material, shape, size, quantity, arrangement position, etc. of the various components in the above-mentioned embodiments may be arbitrary and not limited, as long as the present invention can be realized.

For example, it goes without saying that, as shown in FIG. 7 , the current sensor is installed in the current sensor housing chamber from above, and then the bus bar is installed in the manner shown in FIGS. 4 and 5 to realize the present invention.

Claims (7)

1. Electrical junction box, which is provided with: junction box body, The current detection part provided on the above-mentioned junction box main body, the first contact-piece receiving recess and the second contact-piece receiving recess formed on the above-mentioned current detecting portion, A first contact member made of conductive metal having a first contact piece formed with a first screw insertion hole and the first contact piece is provided on the junction box main body in such a manner as to be located in the first contact piece accommodation recess. middle; A second contact member made of conductive metal having a second contact piece formed with a second screw insertion hole and the second contact piece is provided on the junction box main body in such a manner as to be located in the second contact piece accommodating recess. middle; a current sensor accommodating chamber disposed between the first contact piece accommodating recess and the second contact piece accommodating recess; A current sensor having a sensor main body and a through-hole formed through the sensor main body, the current sensor is accommodated in the above-mentioned current sensor housing chamber so as to be in the opening of the above-mentioned through-hole on both side surfaces of the above-mentioned sensor main body One of the openings of the through holes faces toward the side of the first contact piece accommodation recess, and the other of the openings of the above-mentioned through holes faces toward the side of the second contact piece accommodation recess; A bus bar insertion path extending from the first contact piece in the first contact piece accommodation recess through the through hole of the current sensor to the second contact piece in the second contact piece accommodation recess; a contact wall provided in the above-mentioned second contact piece accommodating recess in such a manner as to form a terminal end of the above-mentioned bus bar insertion path; The bus bar made of conductive metal for current detection has a plate-shaped bus bar main body, and a first screw that penetrates along the thickness direction is formed on the first end of one of the two end parts in the length direction of the bus bar main body. hole, and a second screw fixing hole penetrating through the thickness direction is formed on the second end of the other of the two ends of the main body of the busbar in the length direction; and The busbar temporary placement recess is provided in connection with the above-mentioned first contact piece accommodation recess, and forms a busbar sliding path aligned with the above-mentioned busbar insertion path, the busbar temporary placement recess has a bottom surface that can temporarily place the above-mentioned busbar, and at the same time, restricting the sliding direction of the bus bar on the bottom surface to the length direction of the bus bar, The electric junction box detects the current flowing in the above-mentioned bus bar through the above-mentioned current sensor, and is characterized in that: The bus bar placed on the bottom surface of the bus bar temporary storage recess slides along the bus bar insertion path toward the through hole of the current sensor and passes through the through hole, and when the second end portion contacts the contact wall, passes through the through hole of the current sensor. The two walls forming the insertion path of the bus bar of the first contact piece accommodation recess and the second contact piece accommodation recess respectively restrict the movement of the bus bar in the width direction, and at the same time, make the first screw fixing hole of the first end part and the first screw fixing hole. The first screw insertion hole of the first contact piece is aligned, and the second screw fixing hole of the second end is aligned with the second screw insertion hole of the second contact piece, fastening the first end portion on the current detection portion so as to keep the first end portion of the bus bar in contact with the first contact with the first screw passing through the first screw fixing hole and the first screw insertion hole The state of contact between pieces, fastening the second end portion on the current detecting portion so as to keep the second end portion of the bus bar in contact with the second screw through the second screw passing through the second screw fixing hole and the second screw insertion hole The state of contact between the sheets. 2. The electrical junction box according to claim 1, characterized in that: The first screw and the second screw have threaded portions of different diameters, The diameter of the first screw fixing hole of the above-mentioned bus bar corresponds to the diameter of the threaded part of the above-mentioned first screw, The diameter of the second screw fixing hole of the above-mentioned busbar corresponds to the diameter of the threaded part of the above-mentioned second screw, The first end portion of the bus bar has a portion having a width greater than that of the second end portion, At least one of the two walls of the first contact-piece receiving recess is formed with a bus bar misinsertion preventing portion protruding in the width direction of the bus bar in the bus bar insertion path, When the first end of the bus bar is located on the front side in the direction of sliding travel and slides toward the through hole on the bottom surface of the temporary housing recess for the bus bar, the first end contacts the wrong insertion prevention part of the bus bar to prevent it. Enter the busbar insertion path above. 3. The electrical junction box according to claim 1 or 2, characterized in that: The current detection unit is formed on the upper surface of the junction box main body, The current sensor storage chamber communicates with the lower opening of the junction box main body, and extends upward from between the first contact piece storage recess and the second contact piece storage recess, and at the same time, faces the opening of the first contact piece storage recess. The side wall and the side wall facing the second contact piece receiving recess respectively have openings; and, The current sensor is such that one of the openings of the through-holes on both side surfaces of the sensor body faces the side of the first contact piece accommodating recess, and the other of the openings of the through-hole faces the side of the second contact piece accommodating recess. Insert it into the current sensor accommodating chamber from the lower surface side of the junction box main body. 4. The electrical junction box according to claim 3, wherein a confirmation window for exposing the upper surface of the current sensor is formed on the upper wall of the current sensor housing chamber. 5. The electrical junction box according to claim 1 or 2, characterized in that: the terminal made of conductive metal that is electrically connected to the conductor of the terminal portion of the electric wire electrically connected to the battery passes through the above-mentioned terminal that passes through the screw hole thereof. The second screw is fastened to the current detection part in a state of being in contact with the second end part. 6. The electrical junction box according to claim 3, wherein the terminal made of conductive metal that is electrically connected to the conductor of the terminal portion of the electric wire electrically connected to the battery passes through the second screw hole that passes through the terminal. The screw is fastened to the current detection part in a state of being in contact with the second end part. 7. The electrical junction box according to claim 4, wherein the terminal made of conductive metal that is electrically connected to the conductor of the terminal portion of the electric wire electrically connected to the battery passes through the second screw hole that passes through the terminal. The screw is fastened to the current detection part in a state of being in contact with the second end part.

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