JP5030226B2 - Electrical junction box - Google Patents

Description

  The present invention relates to an electrical junction box (ie, electric junction) such as a relay box, a fuse box, an electronic control unit box, etc., which is electrically connected to a battery and various electrical components on a vehicle such as an automobile. More specifically, the present invention relates to an electrical junction box provided with a current detection unit having a bus bar and a current sensor that detects a current flowing through the bus bar.

  Conventionally, various electrical connection boxes provided with a current detection unit having a bus bar and a current sensor that detects a current flowing through the bus bar have been proposed (for example, see Patent Document 1).

  Among these various electrical junction boxes, there is a junction box body that can be fixed to the mounting surface of the vehicle body panel, and an electrical component that is provided on the junction box body as an upper surface thereof and is equipped with electrical components such as fuses, relays, etc. Some include a component mounting surface and a current detection unit provided on the electrical component mounting surface.

  The current detection unit is broken from the junction box body of the conventional electrical junction box having such a configuration, and is shown in FIGS. 7 is an exploded perspective view showing the bus bar and current sensor assembly separately from the current detection unit, FIG. 8 is a front view of the current detection unit with the bus bar and current sensor assembly removed, and FIG. FIG. 10 is a front view of the current detection unit in which the terminals are fixed with bolts while the terminals are in contact with the bus bar.

  As shown in FIGS. 7 and 8, the current detection unit 110 that forms a part of the junction box main body includes a first contact piece housing recess 120 made of synthetic resin and a second contact piece housing recess 140 made of synthetic resin. Is formed.

  The first contact member 130 made of conductive metal disposed in the junction box body has a first contact piece 132 in which a first screw insertion hole 131 is formed, and the first contact piece 132 is the first contact piece 132. 1 contact piece accommodating recess 120 is disposed.

  The second contact member 150 made of conductive metal disposed in the junction box main body has a second contact piece 152 in which a second screw insertion hole 151 is formed, and the second contact piece 152. Is disposed in the second contact piece housing recess 140.

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

  The current detection unit 110 further includes a conductive metal bus bar 170 as a conductor for detecting a current. The bus bar 170 has a plate-like bus bar main body 171, and a first screwing hole 173 penetrating in the thickness direction is formed in one first end 172 of both longitudinal ends of the bus bar main body 171. In addition, a second screwing hole 175 penetrating in the thickness direction is formed in the other second end 174 of both ends of the bus bar body 171 in the longitudinal direction.

  The current detection unit 110 further includes a current sensor 180. The current sensor 180 has a sensor body 181 and a through hole 182 formed so as to penetrate both side surfaces of the sensor body 181.

  As shown in FIGS. 7 and 9, the current sensor 180 has one of the openings of the through holes 182 on both side surfaces of the sensor body 181 on the first contact piece housing recess 120 side and the openings of the through holes 182. The bus bar 170 is inserted into the current sensor housing chamber 160 from the upper surface side of the junction box main body with the bus bar 170 penetrating through the through hole 182 so that the other is directed to the second contact piece housing recess 140 side.

  Then, the operator aligns the first screwing 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 the second end 174 of the bus bar 170. The second screwing hole 175 is aligned with the second screw insertion hole 151 of the second contact piece 152.

  In this state, as shown in FIG. 10, the screw portion of the first bolt (first screw) 200 inserted into the first screw fastening hole 173 and the first screw insertion hole 131 and the first contact piece 132. The first end portion 172 of the bus bar 170 is maintained such that the contact state between the first end portion 172 of the bus bar 170 and the first contact piece 132 is maintained by screwing with a first nut (not shown) disposed below. Is fastened to the current detection unit 110.

  On the other hand, as shown in FIG. 10, the second bolt (second screw) 205 inserted through the second screw fixing hole 175 and the second screw insertion hole 151 and the second contact piece 152 under the screw portion. The second end 174 of the bus bar 170 is electrically connected so that the contact state between the second end 174 of the bus bar 170 and the second contact piece 152 is maintained by screwing with the arranged second nut (not shown). Fastened to the detector 110. At this time, the conductive metal terminal 220 electrically connected to the conductor of the terminal portion 210 of the electric wire electrically connected to the battery (not shown) is also inserted through the screw hole (not shown). The two bolts 205 are fastened to the current detection unit 110 together with the second end 174 in contact with the second end 174 of the bus bar 170.

  The first bolt 200 and the second bolt 205 described above have screw portions having different diameters. Specifically, the first bolt 200 is an M5 bolt, and the second bolt 205 is an M6 bolt having a thread portion having a diameter larger than that of the first bolt 200. Needless to say, the first nut (not shown) and the second nut described above also have corresponding female screw portions with different diameters.

  Therefore, the diameter of the first screwing hole 173 of the bus bar 170 corresponds to the diameter of the screw part of the first bolt 200, and the diameter of the second screwing hole 175 of the bus bar 170 is that of the screw part of the second bolt 205. The diameter is larger than the first screw hole 173 corresponding to the diameter.

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

  As shown in FIG. 7, in the case of the current detection unit 110 configured such that the current sensor 180 with the bus bar 170 inserted into the through hole 182 is assembled to the current sensor storage chamber 160, the first contact piece storage recess 120 and the first Considering the ease of fitting the bus bar 170 fitted in the thickness direction into the two-contact piece accommodating recess 140, usually, large clearances C1, C2, C3 must be provided as shown in FIG. Also, the through hole 182 of the current sensor 180 is formed large enough to prevent the bus bar 170 from contacting the surface defining the through hole 182 of the sensor body 181 in a state where the bus bar 170 is fastened to the current detection unit 110. (That is, a cross-sectional area larger than the cross-sectional area of the bus bar 170 in the width direction).

JP 2007-28773 A

  However, the ease of fitting, that is, providing the large clearances C1, C2, and C3, and in addition, that the through hole 182 of the current sensor 180 is larger than the cross-sectional area in the width direction of the bus bar 170 is the first bolt 200. Before the screwing with the second bolt 205, the range in which the bus bar 170 can be moved is widened, and the first screw fixing hole 173 of the bus bar 170 and the first screw insertion hole 131 of the first contact piece 132 are aligned. In addition, the workability of the alignment work between the second screw fastening hole 175 of the bus bar 170 and the second screw insertion hole 151 of the second contact piece 152 is deteriorated.

  Also, since the first screwing hole 173 and the second screwing hole 175 of the bus bar 170 are different in size, the current sensor is in a state in which the bus bar 170 is passed through the through hole 182 so that their positions are reversed in error. When the 180 is assembled in the current sensor housing chamber 160, it may be necessary for improvement because the worker may finally notice it, especially during the screwing operation of the second bolt 205, and then reassemble it. It was.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to improve workability of assembling the bus bar to the current detection unit, and to effectively correct the assembly of the bus bar to the current detection unit. It is to provide an electrical junction box that can be prevented.

In order to achieve the above-described object, the electrical junction box according to the present invention is characterized by the following (1) to (5).
(1) the junction box body;
A current detector provided in the junction box body;
A first contact piece housing recess and a second contact piece housing recess formed in the current detection unit;
A first contact piece formed with a first screw insertion hole, and made of a conductive metal disposed in the junction box body so that the first contact piece is located in the first contact piece housing recess; A first contact member;
A second contact piece having a second screw insertion hole is formed, and the second contact piece is made of a conductive metal disposed in the connection box main body so as to be positioned in the second contact piece housing recess. A second contact member;
A current sensor housing chamber disposed between the first contact piece housing recess and the second contact piece housing recess;
A sensor body, and a through hole formed to penetrate the sensor body, wherein one of the openings of the through holes on both side surfaces of the sensor body is on the first contact piece housing recess side, and A current sensor housed in the current sensor housing chamber so that the other of the openings of the through holes faces the second contact piece housing recess side;
A bus bar insertion path extending from the top of the first contact piece in the first contact piece housing recess to the second contact piece in the second contact piece housing recess through the through hole of the current sensor;
An abutting wall provided in the second contact piece accommodating recess so as to form an end of the bus bar insertion path;
A first bus hole having a plate-like bus bar main body, a first screwing hole penetrating in the thickness direction is formed at one first end of both ends in the longitudinal direction of the bus bar main body, and the longitudinal direction of the bus bar main body A conductive metal bus bar for current detection, in which a second screwing hole penetrating in the thickness direction is formed in the other second end of the both ends of
A bus bar slide path that is continuous with the first contact piece housing recess and is aligned with the bus bar insertion path is formed, and has a bottom surface on which the bus bar can be temporarily placed, and the bus bar A bus bar temporary placement recess that regulates the sliding direction on the bottom in the longitudinal direction of the bus bar;
With
An electrical junction box in which a current flowing through the bus bar is detected by the current sensor,
The bus bar placed on the bottom surface of the bus bar temporary placement recess is slid along the bus bar insertion path toward the through hole of the current sensor, passes through the through hole, and the second wall contacts the contact wall. When the end portions are brought into contact with each other, movement of the bus bar in the width direction is restricted by both walls forming the bus bar insertion path of each of the first contact piece receiving recess and the second contact piece receiving recess, and A first screwing hole at one end is aligned with a first screw insertion hole of the first contact piece, and a second screwing hole at the second end is a second of the second contact piece. Aligned with the screw insertion hole,
The first end so that a contact state between the first end of the bus bar and the first contact piece is maintained by the first screw inserted through the first screw fixing hole and the first screw insertion hole. A portion is fastened to the current detection portion, and a contact between the second end of the bus bar and the second contact piece by a second screw inserted into the second screw fixing hole and the second screw insertion hole The second end is fastened to the current detection unit so that the state is maintained.
(2) In the electrical junction box configured as described in (1) above,
The first screw and the second screw have screw portions of different diameters;
The diameter of the first screwing hole of the bus bar corresponds to the diameter of the threaded portion of the first screw;
The diameter of the second screwing hole of the bus bar corresponds to the diameter of the threaded portion of the second screw;
The first end of the bus bar has a portion with a width greater than the width of the second end;
At least one of the two walls of the first contact piece housing recess is formed with a bus bar erroneous insertion preventing portion protruding in the width direction of the bus bar in the bus bar insertion path, and the bus bar has its first When the one end portion is slid on the bottom surface of the temporary holding recess portion of the bus bar toward the through hole with the one end portion on the front side in the sliding direction, the first end portion contacts the bus bar erroneous insertion preventing portion, and the bus bar Be prevented from entering the 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 body,
The current sensor housing chamber communicates with an opening on the lower surface of the junction box body and extends upward from between the first contact piece housing recess and the second contact piece housing recess, and the first Each of the side wall facing the contact piece receiving recess and the side wall facing the second contact piece receiving recess has an opening, and the current sensor is one of the openings of the through holes on both side surfaces of the sensor body. Insert into the current sensor housing chamber from the lower surface side of the junction box body so that one side faces the first contact piece housing recess and the other of the openings of the through hole faces the second contact strip housing recess. To be done.
(4) In the electrical junction box configured as described in (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 constitutions (1) to (4),
A conductive metal terminal electrically connected to the conductor of the terminal portion of the electric wire electrically connected to the battery is in contact with the second end by the second screw inserted through the screw hole. Fastened to the current detector.

In the electrical junction box configured as described in (1) above, the junction box body is connected to the first contact piece housing recess to form a bus bar slide path that is aligned so as to be continuous with the bus bar insertion path, and the bottom surface of the bus bar. A bus bar temporary storage recess for restricting the sliding direction in the longitudinal direction of the bus bar is provided. The bus bar placed on the bottom surface of the bus bar temporary recess is slid along the bus bar insertion path toward the through hole of the current sensor, passes through the through hole, and abuts the second end against the abutting wall. When this is done, the movement of the bus bar in the width direction is restricted by both walls forming the bus bar insertion path of each of the first contact piece receiving recess and the second contact piece receiving recess, and the first screw hole for the first end portion Is aligned with the first screw insertion hole of the first contact piece, and the second screw fixing hole of the second end is aligned with the second screw insertion hole of the second contact piece. Therefore, according to the electrical junction box having the configuration (1), the workability of assembling the bus bar to the current detection unit is improved.
In the electrical junction box having the configuration (2), the first end portion of the bus bar has a portion having a width larger than the width of the second end portion, and both the bus bar insertion paths of the first contact piece receiving recess are formed. At least one of the walls is formed with a bus bar erroneous insertion preventing portion that protrudes in the width direction of the bus bar in the bus bar insertion path, and the bus bar has the first end thereof on the front side in the sliding direction of the current sensor. When the bus bar is temporarily moved toward the through hole on the bottom surface of the recess for temporarily placing the bus bar, the first end portion of the bus bar comes into contact with the bus bar erroneous insertion preventing portion and is prevented from entering the bus bar insertion path. Therefore, according to the electrical junction box having the configuration (2), it is possible to effectively prevent the erroneous assembly of the bus bar to the current detection unit.
In the electrical junction box having the configuration (3), the current sensor housing chamber has an opening on each of the side wall facing the first contact piece housing recess and the side wall facing the second contact piece housing recess. These openings on both side walls are provided for smoothly inserting the bus bar into the through hole of the current sensor. In the electrical junction box having the configuration of (3) above, the current sensor has one of the openings of the through holes on both sides of the sensor body on the first contact piece housing recess side and the other of the openings of the through holes. Is inserted into the current sensor accommodating chamber from the opening on the lower surface of the junction box main body so as to face the second contact piece accommodating recess. Therefore, according to the electrical junction box having the configuration (3), the first contact piece receiving recess and the second contact piece receiving recess are provided to insert the current sensor into the current sensor receiving chamber from the upper surface side of the connection box body. The mechanical strength of the current detection unit can be increased as compared with a conventional electrical junction box that requires an opening therebetween.
In the electrical junction box configured as described in (4) above, the current sensor housing chamber has an upper wall formed with a confirmation window for exposing the upper surface of the current sensor. It can be confirmed through the confirmation window whether it has been accommodated.
According to the electrical junction box having the configuration of (5) above, the conductive metal terminal that is electrically connected to the conductor of the terminal portion of the electric wire electrically connected to the battery is inserted into the screw hole. Since the second screw is fastened to the current detection unit in contact with the second end of the bus bar, power is supplied from the battery.

  ADVANTAGE OF THE INVENTION According to this invention, the workability | operativity of the operation | work which assembles a bus bar to an electric current detection part can be improved, and the incorrect attachment of the bus bar to an electric current detection part can be prevented effectively.

  The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading through the best mode for carrying out the invention described below with reference to the accompanying drawings.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings. FIG. 1 is a view showing one embodiment (electric connection box 1) of an electric connection box according to the present invention, and is a top view of a connection box main body showing an electric component mounting portion of the electric connection box and a terminal with electric wires. 2 is an exploded perspective view showing a state before the bus bar and the current sensor are assembled to the current detection unit, FIG. 3 is a top view of the current detection unit showing a direction in which the bus bar is inserted into the current detection unit in which the current sensor is incorporated, and FIG. 4 is a top view of the current detection unit in a state in which the bus bar is placed on the bottom surface of the bus bar temporary placement recess.

  FIG. 5 shows a state where the bus bar is slid along the bus bar insertion path toward the through hole of the current sensor from the state shown in FIG. 4, passes through the through hole, and makes the second end abut against the abutment wall. In more detail, the movement of the bus bar in the width direction is restricted by both walls forming the bus bar insertion path of each of the first contact piece receiving recess and the second contact piece receiving recess. In addition, the first screw hole at the first end of the bus bar is aligned with the first screw insertion hole of the first contact piece, and the second screw hole at the second end of the bus bar is the second contact. It is a top view of the electric current detection part of the state aligned with the hole for the 2nd screw insertion of a piece.

  FIG. 6 shows a state of the current detection unit when the bus bar is slid and moved on the bottom surface of the temporary recess of the bus bar toward the through hole of the current sensor with the first end thereof in front of the sliding direction. More specifically, it is a top view of the current detection unit in a state in which the first end portion of the bus bar is in contact with the bus bar erroneous insertion prevention unit and is prevented from entering the bus bar insertion path.

  As shown in FIG. 1, the electrical junction box 1 has a configuration in which a current flowing through a bus bar is detected by a current sensor, and a junction box body 2 that can be fixed to a vehicle body panel by a lock, An electrical component mounting surface 5 provided on the connection box body 2 as an upper surface thereof, on which plug-in electrical components such as a blade-type fuse 3 and a relay 4 are mounted, and a current detection unit provided on the electrical component mounting surface 5 10.

  As shown in FIG. 1 to FIG. 3, the current detection unit 10 formed on the upper surface of the junction box body 2, that is, the current detection unit 10 that forms a part of the junction box body 2 includes a first synthetic resin. A contact piece receiving recess 20 and a synthetic resin second contact piece receiving recess 40 are formed.

  As shown in FIG. 3, the first contact member 30 made of conductive metal disposed in the junction box body 2 has a first contact piece 32 in which a first screw insertion hole 31 is formed. The first contact piece 32 is disposed in the first contact piece housing recess 20.

  As shown in FIG. 3, the second contact member 50 made of conductive metal disposed in the junction box body 2 has a second contact piece 52 in which a second screw insertion hole 51 is formed. The second contact piece 52 is disposed in the second contact piece housing recess 40.

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

  More specifically, the current sensor housing chamber 60 communicates with the opening on the lower surface of the junction box body 2 and, as shown in FIG. 2, the first contact piece housing recess 20 and the second contact piece housing recess 40. In addition to extending from above, the side wall 61 facing the first contact piece housing recess 20 and the side wall 62 facing the second contact piece housing recess 40 have openings. A confirmation window 65 is formed on the upper wall of the current sensor housing chamber 60.

  The current detection unit 10 further includes a current sensor 180 accommodated in the current sensor accommodation chamber 60. The current sensor 180 is the same current sensor as described with reference to FIGS. 7 to 10, and as shown in FIG. 2, is formed so as to penetrate the sensor body 181 and the sensor body 181. Through-hole 182.

  In the current sensor 180, one of the openings of the through holes 182 on both side surfaces 183 and 184 of the sensor body 181 is on the first contact piece housing recess 20 side, and the other of the openings of the through holes 182 is the second contact piece. It is inserted into the current sensor housing chamber 60 from the lower surface side of the junction box body 2 so as to face the housing recess 40 side. Note that a confirmation window 65 for exposing the upper surface 185 of the accommodated current sensor 180 is formed on the upper wall of the current sensor accommodation chamber 60.

  As shown in FIGS. 2 and 3, in the current detection unit 10, the second contact piece accommodation recess is formed on the first contact piece 32 in the first contact piece accommodation recess 20 through the through hole 182 of the current sensor 180. A bus bar insertion path 85 extending on the second contact piece 52 in 40 is formed. A contact wall 45 that forms the end of the bus bar insertion path 85 is provided in the second contact piece housing recess 40.

  The current detection unit 10 further includes a bus bar 70 made of conductive metal as a conductor for detecting a current. The bus bar 70 has a plate-like bus bar main body 71, and a first screwing hole 73 penetrating in the thickness direction is formed in one first end 72 of both longitudinal ends of the bus bar main body 71. In addition, a second screwing hole 75 penetrating in the thickness direction is formed in the other second end 74 of both ends of the bus bar main body 71 in the longitudinal direction.

  Furthermore, the current detection unit 10 includes a bus bar temporary storage recess 80 that is connected to the first contact piece housing recess 20. As shown in FIG. 3, the bus bar temporary placement recess 80 forms a bus bar slide path 81 aligned so as to be continuous with the bus bar insertion path 85, and has a bottom surface 82 on which the bus bar 70 can be temporarily placed. And has both side surfaces 83, 83 that extend upward from the bottom surface 82 and restrict the sliding direction of the bus bar 70 on the bottom surface 82 to the longitudinal direction of the bus bar 70.

  Now, the bus bar 70 is assembled to the current detection unit 10 as follows after the current sensor 180 is inserted and accommodated in the current sensor accommodating chamber 60 from the opening on the lower surface of the junction box body 2.

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

  As shown in FIG. 5, when the bus bar 70 passes through the through hole 182 and abuts the second end 74 against the abutment wall 45, the busbar insertion path 85 of the first contact piece housing recess 20 is formed. The width direction of the bus bar 70 by both walls 21 and 21 to be formed (more specifically, the bus bar erroneous insertion preventing portions 25 and 25) and the both walls 41 and 41 forming the bus bar insertion path 85 of the second contact piece housing recess 40. Movement is restricted.

  Further, at this time, the first screwing 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 screwing hole 75 of the second end 74 is arranged. Is aligned with the second screw insertion hole 51 of the second contact piece 52.

  In this state, the first bolt 200 (see FIG. 10) inserted through the first screw fixing hole 73 and the first screw insertion hole 31 and the first contact piece 32 disposed below the first contact piece 32. The first end 72 of the bus bar 70 is fastened to the current detection unit 10 so that the contact state between the first end 72 of the bus bar 70 and the first contact piece 32 is maintained by screwing with a nut (not shown). Is done.

  On the other hand, the second nut 205 (see FIG. 10) inserted through the second screw fastening hole 75 and the second screw insertion hole 51 and the second nut (not shown) disposed below the second contact piece 52. The second end 74 of the bus bar 70 is fastened to the current detection unit 10 so that the contact state between the second end 74 of the bus bar 70 and the second contact piece 52 is maintained by screwing with the current detection unit 10. . At this time, the conductive metal terminal 220 (see FIGS. 1 and 10) electrically connected to the conductor of the end portion 210 of the electric wire electrically connected to the battery (not shown) is also provided in the screw hole. The second bolt 205 inserted (not shown) is fastened to the current detector 10 together with the second end 74 in contact with the second end 74 of the bus bar 70.

  As described above, 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 having a thread portion having a diameter larger than that of the first bolt 200. Needless to say, the first nut (not shown) and the second nut described above also have corresponding female screw portions with different diameters.

  Therefore, the diameter of the first screwing hole 73 of the bus bar 70 corresponds to the diameter of the screw part of the first bolt 200, and the diameter of the second screwing hole 75 of the bus bar 70 is the screw part of the second bolt 205. The diameter is larger than the first screw hole 73 corresponding to the diameter.

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

  The first end 72 of the bus bar 70 has a portion 76 having a width larger than the width of the second end 74 (in this embodiment, the portions 76 and 76 having a larger width are the first end 72. Are provided so as to protrude from both side surfaces in the width direction).

  Further, at least one of the both walls 21 and 21 of the first contact piece housing recess 20 is formed with a bus bar erroneous insertion preventing portion 25 protruding in the width direction of the bus bar 70 in the bus bar insertion path 85 (this embodiment). In the embodiment, bus bar erroneous insertion preventing portions 25, 25 are provided on the inner surfaces of both walls 21, 21 of the first contact piece housing recess 20).

  With such a configuration, as shown in FIG. 6, the bus bar 70 is slid and moved on the bottom surface 82 of the bus bar temporary placement recess 80 toward the through hole 182 with the first end 72 thereof in the forward direction of sliding. Then, the first end portion 72 comes into contact with the bus bar erroneous insertion preventing portion 25 so as to be prevented from entering the bus bar insertion path 85.

  In the electrical junction box 1 configured as described above, the junction box main body 2 is connected to the first contact piece housing recess 20 to form a bus bar slide path 81 that is aligned with the bus bar insertion path 85 and the bus bar 70. The bus bar temporary placing recess 80 is provided to restrict the sliding direction on the bottom surface 82 of the bus bar 70 to the longitudinal direction of the bus bar 70.

  The bus bar 70 placed on the bottom surface 82 of the bus bar temporary placement recess 80 is slid along the bus bar insertion path 85 toward the through hole 182 of the current sensor 180, passes through the through hole 182, and the contact wall 45. When the second end 74 is brought into contact with the second end 74, the movement of the bus bar 70 in the width direction is caused by the both walls 21 and 41 forming the bus bar insertion paths 85 of the first contact piece receiving recess 20 and the second contact piece receiving recess 40, respectively. The first screw 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 hole of the second end 74 is restricted. 75 is aligned with the second screw insertion hole 51 of the second contact piece 52.

  Therefore, according to the electrical junction box 1 having the above-described configuration, workability of assembling the bus bar 70 to the current detection unit 10 is improved.

  In the electrical junction box 1 configured as described above, the first end 72 of the bus bar 70 has a portion 76 having a width larger than the width of the second end 74, and the bus bar insertion path of the first contact piece housing recess 20. At least one of both walls 21 forming 85 is formed with a bus bar erroneous insertion preventing portion 25 protruding in the width direction of the bus bar 70 in the bus bar insertion path 85, and the bus bar 70 has a first end portion thereof. When the front end 72 of the bus bar 70 is slid and moved toward the through hole 182 of the current sensor 180 with the front side 72 in the sliding direction, the first end 72 of the bus bar 70 becomes the bus bar erroneous insertion preventing portion 25. It abuts and is prevented from entering the bus bar insertion path 85.

  Therefore, according to the electrical junction box 1 having the above-described configuration, it is possible to effectively prevent erroneous assembly of the bus bar 70 to the current detection unit 10.

  Furthermore, in the electrical junction box 1 configured as described above, the current sensor housing chamber 60 has openings on the side wall 61 facing the first contact piece housing recess 20 and the side wall 62 facing the second contact piece housing recess 40, respectively. Yes. The openings of both side walls 61 and 62 are provided for smoothly inserting the bus bar 70 into the through hole 182 of the current sensor 180.

  In the electrical junction box 1 having the above-described configuration, the current sensor 180 includes one of the openings of the through holes 182 in the both side surfaces 183 and 184 of the sensor body 181 on the first contact piece housing recess 20 side, and the through hole 182. The other of the openings is inserted into the current sensor housing chamber 60 through the opening on the lower surface of the junction box body 2 so that the other side faces the second contact piece housing recess 40 side.

  Therefore, according to the electrical junction box 1 configured as described above, the first contact piece accommodating recess 20 and the second contact piece accommodating recess 40 are used to insert the current sensor 180 into the current sensor accommodating chamber 60 from the upper surface side of the junction box body 2. Compared with the electrical connection box 1 of the conventional form which requires an opening between, the mechanical strength of the electric current detection part 10 can be raised.

  Furthermore, in the electrical junction box 1 having the above configuration, the current sensor housing chamber 60 has an upper wall on which a 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 accommodated therein.

  Furthermore, according to the electrical junction box 1 having the above configuration, the conductive metal terminal that is electrically connected to the conductor of the terminal portion of the electric wire electrically connected to the battery is inserted into the screw hole. Since the second bolt 205 is fastened to the current detection unit 10 in contact with the second end 74 of the bus bar 70, power is supplied from the battery.

  According to the present invention, the workability of the work of assembling the bus bar 70 to the current detection unit 10 can be improved, and the erroneous assembly of the bus bar 70 to the current detection unit 10 can be effectively prevented. It is useful for electrical junction boxes such as relay boxes, fuse boxes, electronic control unit boxes, etc. that are electrically connected to the battery and various electrical components.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

  For example, it is needless to say that the present invention can be applied to a form in which the current sensor is assembled to the current sensor accommodating chamber from above as shown in FIG. 7, and then the bus bar is assembled as shown in FIGS. Yes.

It is a figure which shows one Embodiment of the electrical junction box which concerns on this invention, Comprising: It is a top view of the junction box main body which shows the electrical component mounting part of an electrical junction box, and a terminal with an electric wire. It is a disassembled perspective view which shows the state before attaching a bus-bar and a current sensor to a current detection part. It is a top view of the current detection part which shows the direction which inserts a bus bar in the current detection part in which the current sensor was incorporated. It is a top view of the electric current detection part of the state in which the bus bar was mounted on the bottom face of a bus-bar temporary placement recessed part. When the bus bar is slid along the bus bar insertion path from the state shown in FIG. 4 toward the through hole of the current sensor, passes through the through hole, and the second end is in contact with the contact wall, the current detection unit More specifically, the movement of the bus bar in the width direction is restricted by both walls forming the bus bar insertion path of each of the first contact piece receiving recess and the second contact piece receiving recess, and the bus bar The first screw hole on the first end is aligned with the first screw insertion hole on the first contact piece, and the second screw hole on the second end of the bus bar is the second screw on the second contact piece. It is a top view of the electric current detection part of the state aligned with the screw insertion hole. The state of the current detection unit when the bus bar is slid on the bottom surface of the bus bar temporary placement recess toward the through hole of the current sensor with the first end thereof in the forward direction of sliding is shown in more detail. FIG. 6 is a top 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 erroneous insertion prevention unit and is prevented from entering the bus bar insertion path. It is a disassembled perspective view which isolate | separates and shows the assembly of a bus bar and a current sensor from a current detection part. It is a front view of the current detection part of the state which removed the assembly of the bus bar and the current sensor. It is a front view of the electric current detection part of the state which assembled | attached the assembly of the bus bar and the current sensor. It is a front view of the electric current detection part with which the terminal with an electric wire was fixed with the volt | bolt in the contact state with the bus-bar.

Explanation of symbols

1: Electrical junction box 2: Junction box body 10: Current detection unit 20: First contact piece accommodation recess 21: Both walls 31: First screw insertion hole 32: First contact piece 40: Second contact piece accommodation recess 41 : Both walls 45: contact wall 51: second screw insertion hole 52: second contact piece 70: bus bar 72: first end 73: first screw fixing hole 74: second end 75: second screw Stop hole 80: Busbar temporary placement recess 82: Bottom surface 85: Busbar insertion path 180: Current sensor 182: Through hole

Claims (5)

The junction box body,
A current detector provided in the junction box body;
A first contact piece housing recess and a second contact piece housing recess formed in the current detection unit;
A first contact piece formed with a first screw insertion hole, and made of a conductive metal disposed in the junction box body so that the first contact piece is located in the first contact piece housing recess; A first contact member;
A second contact piece having a second screw insertion hole is formed, and the second contact piece is made of a conductive metal disposed in the connection box main body so as to be positioned in the second contact piece housing recess. A second contact member;
A current sensor housing chamber disposed between the first contact piece housing recess and the second contact piece housing recess;
A sensor body, and a through hole formed to penetrate the sensor body, wherein one of the openings of the through holes on both side surfaces of the sensor body is on the first contact piece housing recess side, and A current sensor housed in the current sensor housing chamber so that the other of the openings of the through holes faces the second contact piece housing recess side;
A bus bar insertion path extending from the top of the first contact piece in the first contact piece housing recess to the second contact piece in the second contact piece housing recess through the through hole of the current sensor;
An abutting wall provided in the second contact piece accommodating recess so as to form an end of the bus bar insertion path;
A first bus hole having a plate-like bus bar main body, a first screwing hole penetrating in the thickness direction is formed at one first end of both ends in the longitudinal direction of the bus bar main body, and the longitudinal direction of the bus bar main body A conductive metal bus bar for current detection, in which a second screwing hole penetrating in the thickness direction is formed in the other second end of the both ends of
A bus bar slide path that is continuous with the first contact piece housing recess and is aligned with the bus bar insertion path is formed, and has a bottom surface on which the bus bar can be temporarily placed, and the bus bar A bus bar temporary placement recess that regulates the sliding direction on the bottom in the longitudinal direction of the bus bar;
With
An electrical junction box in which a current flowing through the bus bar is detected by the current sensor,
The bus bar placed on the bottom surface of the bus bar temporary placement recess is slid along the bus bar insertion path toward the through hole of the current sensor, passes through the through hole, and the second wall contacts the contact wall. When the end portions are brought into contact with each other, movement of the bus bar in the width direction is restricted by both walls forming the bus bar insertion path of each of the first contact piece receiving recess and the second contact piece receiving recess, and A first screwing hole at one end is aligned with a first screw insertion hole of the first contact piece, and a second screwing hole at the second end is a second of the second contact piece. Aligned with the screw insertion hole,
The first end so that a contact state between the first end of the bus bar and the first contact piece is maintained by the first screw inserted through the first screw fixing hole and the first screw insertion hole. A portion is fastened to the current detection portion, and a contact between the second end of the bus bar and the second contact piece by a second screw inserted into the second screw fixing hole and the second screw insertion hole The electrical connection box, wherein the second end is fastened to the current detection unit so that the state is maintained. The first screw and the second screw have screw portions of different diameters;
The diameter of the first screwing hole of the bus bar corresponds to the diameter of the threaded portion of the first screw;
The diameter of the second screwing hole of the bus bar corresponds to the diameter of the threaded portion of the second screw;
The first end of the bus bar has a portion with a width greater than the width of the second end;
At least one of the two walls of the first contact piece housing recess is formed with a bus bar erroneous insertion preventing portion protruding in the width direction of the bus bar in the bus bar insertion path, and the bus bar has its first When the one end portion is slid on the bottom surface of the temporary holding recess portion of the bus bar toward the through hole with the one end portion on the front side in the sliding direction, the first end portion contacts the bus bar erroneous insertion preventing portion, and the bus bar The electrical junction box according to claim 1, wherein entry into the insertion path is prevented. The current detection unit is formed on the upper surface of the junction box body,
The current sensor housing chamber communicates with an opening on the lower surface of the junction box body and extends upward from between the first contact piece housing recess and the second contact piece housing recess, and the first Each of the side wall facing the contact piece receiving recess and the side wall facing the second contact piece receiving recess has an opening, and the current sensor is one of the openings of the through holes on both side surfaces of the sensor body. Insert into the current sensor housing chamber from the lower surface side of the junction box body so that one side faces the first contact piece housing recess and the other of the openings of the through hole faces the second contact strip housing recess. The electrical junction box according to claim 1 or 2, wherein the electrical junction box is provided.   The electrical connection box according to claim 3, wherein a confirmation window for exposing an upper surface of the current sensor is formed on an upper wall of the current sensor housing chamber.   A conductive metal terminal electrically connected to the conductor of the terminal portion of the electric wire electrically connected to the battery is in contact with the second end by the second screw inserted through the screw hole. The electrical connection box according to claim 1, wherein the electrical connection box is fastened to the current detection unit.

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