Electrical junction box

Abstract

To provide an electric connection box which can suppress falling of bolts.SOLUTION: An electric connection box loaded on a vehicle comprises: a terminal block; a plurality of first conductive members provided on the terminal block and arranged in a line; a plurality of second conductive members provided on the terminal block and arranged in the other line; a plurality of first bolts tightened to the terminal block from downward to fix electric wires electrically connected with the respective first conductive members to the terminal block; a plurality of second bolts tightened to the terminal block from downward to fix electric wires electrically connected with the respective second conductive members to the terminal block; a first cover member provided on the terminal block to cover the heads of the plurality of first bolts from downward; and a second cover member provided on the terminal block to cover the heads of the plurality of second bolts from downward.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to an electrical junction box. [Background technology]

[0002] An electric wire that supplies power from an on-board battery to each on-board load inside a vehicle is branched into multiple electric wires in an electric junction box (a junction box), and each of the multiple electric wires is connected to each of the on-board loads. Such an electric junction box includes a terminal block, multiple bus bars provided on the terminal block, and multiple bolts that secure the multiple electric wires to the terminal block while electrically connecting each of the bus bars (see, for example, Patent Document 1). The multiple bus bars described in Patent Document 1 are arranged in two parallel rows, divided into an upper row and a lower row of the terminal block. Electric wires are secured to the terminal block by bolts at positions corresponding to the bus bars in each row. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-13267 Summary of the Invention [Problem to be solved by the invention]

[0004] If the electrical junction box of Patent Document 1 is installed with the bolt heads facing downward, there is a risk that the bolts in each row may loosen and fall off the terminal block. If the bolts fall off, it may cause problems such as short-circuiting other components inside the electrical junction box.

[0005] Therefore, an object of the present disclosure is to provide an electrical junction box that can prevent bolts from falling off. [Means for solving the problem]

[0006] An electrical connection box according to one embodiment of the present disclosure is an electrical connection box mounted on a vehicle, and includes a terminal block, a plurality of first conductive members provided on the terminal block and arranged in a row, a plurality of second conductive members provided on the terminal block and arranged in another row, a plurality of first bolts fastened to the terminal block from below and fixing electric wires electrically connected to each of the first conductive members to the terminal block, a plurality of second bolts fastened to the terminal block from below and fixing electric wires electrically connected to each of the second conductive members to the terminal block, a first cover member provided on the terminal block and covering heads of the plurality of first bolts from below, and a second cover member provided on the terminal block and covering heads of the plurality of second bolts from below. [Effects of the Invention]

[0007] According to the electrical junction box of the present disclosure, it is possible to prevent the bolt from falling off. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram of a vehicle equipped with an electrical junction box according to this embodiment. [Figure 2] FIG. 2 is a perspective view of the electrical junction box. [Figure 3] FIG. 3 is a perspective view of the electrical junction box with the first cover member and the second cover member removed. [Figure 4] FIG. 4 is a plan view of the terminal block as seen from below. [Figure 5] FIG. 5 is a cross-sectional view taken along the arrow II in FIG. [Figure 6] FIG. 6 is a plan view of the first cover member as seen from below. [Figure 7] FIG. 7 is an enlarged cross-sectional view of part II in FIG. [Figure 8] FIG. 8 is an enlarged cross-sectional view of part III in FIG. [Figure 9] FIG. 9 is an enlarged perspective view of a portion IV in FIG. [Figure 10] FIG. 10 is an enlarged cross-sectional view of a portion V in FIG. [Figure 11]FIG. 11 is a cross-sectional view taken along the line VI-VI in FIG. [Figure 12] FIG. 12 is a plan view of the second cover member as seen from below. [Figure 13] FIG. 13 is a cross-sectional view taken along the line VII-VII in FIG. [Figure 14] FIG. 14 is a plan view of the second cover member as seen from above. [Figure 15] FIG. 15 is an enlarged cross-sectional view of part VIII in FIG. [Figure 16] FIG. 16 is an enlarged cross-sectional view of part IX in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] <Summary of Embodiments of the Present Disclosure> First, an outline of the embodiments of the present disclosure will be listed and described. (1) The electrical connection box of the present disclosure is an electrical connection box mounted on a vehicle, and includes a terminal block, a plurality of first conductive members provided on the terminal block and arranged in a row, a plurality of second conductive members provided on the terminal block and arranged in another row, a plurality of first bolts fastened to the terminal block from below and fixing electric wires electrically connected to each of the first conductive members to the terminal block, a plurality of second bolts fastened to the terminal block from below and fixing electric wires electrically connected to each of the second conductive members to the terminal block, a first cover member provided on the terminal block and covering heads of the plurality of first bolts from below, and a second cover member provided on the terminal block and covering heads of the plurality of second bolts from below.

[0010] According to the electrical junction box, the heads of the first bolts that secure the electric wires electrically connected to the first conductive member to the terminal block are covered from below by the first cover member. Furthermore, the heads of the second bolts that secure the electric wires electrically connected to the second conductive member to the terminal block are covered from below by the second cover member. This allows the heads of the first bolts to abut against the first cover member, preventing the first bolts from falling off the terminal block, even if the first bolts loosen from the terminal block. Similarly, the heads of the second bolts to abut against the second cover member, preventing the second bolts from falling off the terminal block, even if the second bolts loosen from the terminal block. Furthermore, the first cover member and the second cover member collectively cover the heads of the first bolts and the heads of the second bolts, respectively. This reduces the number of parts and simplifies the configuration of the electrical junction box.

[0011] (2) It is preferable that the heads of the second bolts are positioned closer to the interior of the terminal block than the heads of the first bolts, and that the second cover member covers the heads of the second bolts from below while being inserted from the side of the terminal block into the interior of the terminal block. In this case, the second cover member is inserted from the side of the terminal block to the inside, so that even if the head of the second bolt is positioned closer to the inside of the terminal block than the head of the first bolt, the second cover member can cover the head of the second bolt.

[0012] (3) It is preferable that the terminal block has a downward protrusion that protrudes downward below the heads of the plurality of first bolts, and the first cover member has a first cover body extending in the column direction in which the plurality of first conductive members are lined up, a lower fitting hole formed in the first cover body and into which the downward protrusion is fitted, and a side contact portion that protrudes laterally from a side surface of the lower fitting hole in the column direction and that comes into contact with a side surface of the downward protrusion when the downward protrusion is fitted into the lower fitting hole. In this case, even if a dimensional error occurs in either the downward protrusion of the terminal block or the lower fitting hole of the first cover body, when the downward protrusion is fitted into the lower fitting hole, the side contact portion protruding from the side surface of the lower fitting hole in the row direction can come into contact with the side surface of the downward protrusion. This makes it possible to prevent the first cover member from rattling in the row direction relative to the lower protrusion, thereby suppressing the generation of abnormal noise caused by such rattling.

[0013] (4) The downward protrusion is preferably part of a partition plate that insulates adjacent first bolts from each other. In this case, the terminal block does not need to be provided with a separate downward protrusion, which further simplifies the configuration of the electrical junction box.

[0014] (5) It is preferable that the side surface of the downward protrusion has a protrusion-side inclined surface that is inclined so that the thickness of the downward protrusion in the column direction gradually decreases downward. In this case, the protrusion-side inclined surface formed on the side surface of the lower protrusion allows the lower protrusion to be smoothly fitted into the lower fitting hole of the first cover body.

[0015] (6) Preferably, the projecting end surface of the side contact portion is formed with a contact-side inclined surface that inclines upward toward the side surface of the lower fitting hole. In this case, the contact side inclined surface formed on the protruding end surface of the side contact portion allows the lower protrusion to be fitted more smoothly into the lower fitting hole of the first cover body.

[0016] (7) It is preferable that the protruding end surface of the side contact portion has an arcuate surface that makes line contact with the side surface of the lower protrusion. In this case, the arcuate surfaces of the side surface contact portions are in line contact with the side surfaces of the lower protrusions, so the contact pressure between the side surface contact portions and the lower protrusions can be increased compared to when the side surface contact portions are in surface contact with the side surfaces of the lower protrusions, thereby further suppressing rattling of the first cover member relative to the lower protrusions in the column direction.

[0017] (8) When the lower protrusion is fitted into the lower fitting hole, it is preferable that the vertical contact length over which the protruding end face of the side contact portion contacts the side face of the lower protrusion is not more than half the vertical contact length over which the side face of the lower protrusion contacts the protruding end face. In this case, when the lower protrusion is fitted into the lower fitting hole, the contact length in the up-down direction where the side contact portion comes into contact with the lower protrusion is of This allows the lower protrusion to be fitted into the lower fitting hole more smoothly.

[0018] (9) It is preferable that the terminal block has a lateral protrusion that protrudes laterally, and the first cover member has a first cover side body that extends in the vertical direction on the side of the terminal block, a lateral fitting hole formed in the first cover side body and into which the lateral protrusion is fitted, and an upper surface contact portion that protrudes downward from the upper surface of the lateral fitting hole and comes into contact with the upper surface of the lateral protrusion when the lateral protrusion is fitted into the lateral fitting hole. In this case, even if a dimensional error occurs in either the lateral protrusion of the terminal block or the lateral fitting hole of the first cover side body, when the lateral protrusion is fitted into the lateral fitting hole, the upper surface contact portion protruding downward from the upper surface of the lateral fitting hole can come into contact with the upper surface of the lateral protrusion. This makes it possible to prevent the first cover member from rattling up and down relative to the lateral protrusion, thereby suppressing the generation of abnormal noise caused by such rattling.

[0019] (10) It is preferable that a first inclined surface be formed on the lower surface of the upper surface contact portion, the first inclined surface being inclined upward in the direction opposite to the fitting direction of the side projection. In this case, the first inclined surface formed on the lower surface of the upper surface contact portion allows the side protrusion to be smoothly fitted into the side fitting hole of the first cover side body.

[0020] (11) It is preferable that a second inclined surface be formed on the lower surface of the upper surface contact portion, which is inclined in the same direction as the first inclined surface and is on the mating direction side of the first inclined surface, and which contacts the upper surface of the lateral protrusion. In this case, the second inclined surface formed on the lower surface of the upper surface contact portion can increase the probability that the upper surface contact portion will come into contact with the lateral protrusion.

[0021] (12) It is preferable that the second inclined surface is more gently inclined than the first inclined surface. In this case, the second inclined surface of the upper surface contact portion, which is more gently inclined than the first inclined surface, contacts the lateral protrusion, making it easier to maintain contact between the upper surface contact portion and the lateral protrusion, thereby preventing the lateral protrusion from coming out of the lateral fitting hole.

[0022] (13) It is preferable that the terminal block has an upper support portion that protrudes downwardly below the heads of the plurality of second bolts and a lower support portion that is arranged at a distance below the upper support portion, and that the second cover member extends in the other row direction in which the plurality of second conductive members are arranged and has a second cover body that is inserted between the upper support portion and the lower support portion, an upper contact portion that protrudes upward from the upper surface of the second cover body and contacts the lower surface of the upper support portion, and a lower contact portion that protrudes downwardly from the lower surface of the second cover body and contacts the upper surface of the lower support portion. In this case, even if a dimensional error occurs in either the upper support portion and the lower support portion of the terminal block or the second cover body, when the second cover body is inserted between the upper support portion and the lower support portion, the upper contact portion of the second cover body can be brought into contact with the lower surface of the upper support portion, and the lower contact portion of the second cover body can be brought into contact with the upper surface of the lower support portion. This makes it possible to prevent the second cover member from rattling in the vertical direction relative to the terminal block, thereby suppressing the generation of abnormal noise caused by such rattling.

[0023] (14) The lower support portion is preferably a part of a partition plate that insulates adjacent first bolts from each other. In this case, the terminal block does not need to be provided with a separate lower support portion, which further simplifies the configuration of the electrical junction box.

[0024] (15) It is preferable that an upper inclined surface be formed on the upper surface of the upper contact portion, the upper inclined surface being inclined downward toward the insertion tip of the second cover body. In this case, the upper inclined surface formed on the upper surface of the upper contact portion allows the second cover member to be smoothly inserted into the terminal block.

[0025] (16) It is preferable that an upper support side inclined surface be formed on the lower surface of the upper support portion, the upper support side inclining upward in the direction opposite to the insertion direction of the second cover body. In this case, the upper support side inclined surface formed on the lower surface of the upper support portion allows the second cover member to be inserted into the terminal block more smoothly.

[0026] (17) It is preferable that a lower inclined surface be formed on the lower surface of the lower contact portion, the lower inclined surface being inclined upward toward the insertion tip of the second cover body. In this case, the lower inclined surface formed on the lower surface of the lower contact portion allows the second cover member to be inserted into the terminal block more smoothly.

[0027] (18) It is preferable that a lower support side inclined surface be formed on the upper surface of the lower support portion, the lower support side inclining downward as it goes toward the opposite side to the insertion direction of the second cover body. In this case, the lower support side inclined surface formed on the upper surface of the lower support portion allows the second cover member to be inserted into the terminal block more smoothly.

[0028] (19) The terminal block preferably has a pair of lower support portions spaced apart in the other row direction and an intermediate support portion disposed between the pair of lower support portions, and the upper surface of the intermediate support portion is preferably located lower than the upper surfaces of the lower support portions. In this case, when the second cover member is inserted from the side of the terminal block, the second cover body and the lower contact portion can be prevented from coming into contact with the upper surface of the intermediate support portion of the terminal block, which allows the second cover member to be inserted into the terminal block more smoothly.

[0029] (20) It is preferable that an intermediate inclined surface be formed on the upper surface of the intermediate support portion, the intermediate inclined surface being inclined downward in a direction opposite to the insertion direction of the second cover body. In this case, the intermediate inclined surface formed on the intermediate support portion allows the second cover member to be inserted into the terminal block more smoothly.

[0030] (21) The second cover member preferably has a restricting portion that restricts the second cover member from coming off the terminal block. In this case, the restricting portion can restrict the second cover member from coming off the terminal block, thereby preventing the second bolt from falling off the terminal block.

[0031] <Details of the embodiment of the present disclosure> Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Note that at least some of the embodiments described below may be combined in any manner. [Vehicle configuration] 1 is a schematic diagram of a vehicle equipped with an electrical junction box according to this embodiment. In FIG. 1, a vehicle 100 is equipped with a power storage device 101, a plurality of on-board loads 102, electric wires 103, and an electrical junction box 1.

[0032] The power storage device 101 is, for example, a high-voltage battery for an EV (Electric Vehicle), such as a lead battery or a lithium-ion battery. The in-vehicle load 102 is, for example, an in-vehicle device, such as a drive motor, an in-vehicle air conditioner, an in-vehicle ECU, or an in-vehicle relay device. The multiple in-vehicle loads 102 are connected in parallel. A voltage output from the power storage device 101 is applied to each in-vehicle load 102 via electric wires 103. The electric wires 103 include positive-side electric wires 104p and 105p and negative-side electric wires 104n and 105n.

[0033] The electrical junction box 1 is interposed between the power storage device 101 and a plurality of on-vehicle loads 102. The electrical junction box 1 includes a plurality of electrical components 2 and a connector 3. The electrical components 2 are, for example, fuses, relays, or semiconductor switches. A positive electrode side electric wire 104p and a negative electrode side electric wire 104n extending from the power storage device 101 are connected to the connector 3.

[0034] In the electrical junction box 1, a positive electrode side electric wire 105p and a negative electrode side electric wire 105n extending from the connector 3 are each branched into multiple branches (five branches in FIG. 1). In the electrical junction box 1, each of the branched positive electrode side electric wires 105p is provided with an electric component 2. The electric component 2 is connected to the negative electrode side electric wire 105p. n The branched positive electrode side electric wire 104p and the branched negative electrode side electric wire 105n are connected to the respective vehicle-mounted loads 102 outside the electric junction box 1. This forms a parallel circuit.

[0035] The electrical junction box 1 configured in this manner functions as a protection device that, when a short circuit or the like occurs in any of the on-vehicle loads 102, melts the fuse of the electrical component 2 in response to an overcurrent, electrically cutting off the path of the electric wire 105p to which the on-vehicle load 102 is connected. This is particularly useful in EVs and the like that are equipped with high-voltage batteries.

[0036] [Configuration of the electrical junction box] Fig. 2 is a perspective view of the electrical junction box 1. In the following description of this embodiment, directions such as "upper," "lower," "right," "left," "front," and "rear" refer to the directions shown in Fig. 2. The electrical junction box 1 includes a terminal block 4, a plurality of first conductive plates (first conductive members) 5, a plurality of second conductive plates (second conductive members) 6, a plurality of first bolts 7 (see Fig. 3), a plurality of second bolts 8 (see Fig. 3), a first cover member 20, and a second cover member 40.

[0037] Fig. 3 is a perspective view of the electrical junction box 1 with the first cover member 20 and the second cover member 40 removed. In Figs. 2 and 3, the electrical junction box 1 of this embodiment includes five first conductive plates 5 and five second conductive plates 6. The number of first bolts 7 is the same as the number of first conductive plates 5. The number of second bolts 8 is the same as the number of second conductive plates 6. For convenience, the second and third first bolts 7 and second bolts 8 from the right are not shown in Figs. 2 and 3 (the same applies to Figs. 5 and 11).

[0038] The terminal block 4 is an insulating body made of, for example, synthetic resin. The terminal block 4 includes a base 11, a pair of side walls 12, a plurality of guide plates 13, and a plurality of partition plates 14. The base 11 is formed, for example, in a substantially rectangular parallelepiped shape. Side walls 12 are provided on both the left and right sides of the base 11. The connector 3 is provided on one of the side walls 12 (the right side in FIG. 2).

[0039] The guide plates 13 are provided between a pair of side walls 12 on the front side of the base 11, protruding downward at intervals in the left-right direction. In this embodiment, four guide plates 13 are provided on the base 11. Electric wires 103 are arranged between adjacent guide plates 13 and between each side wall 12 and its adjacent guide plate 13.

[0040] The plurality of partition plates 14 are provided between a pair of side walls 12 on the rear side of the base 11, protruding downward at intervals in the left-right direction. In the present embodiment, four partition plates 14 are provided on the base 11. Each partition plate 14 has the function of insulating adjacent first conductive plates 5 from each other.

[0041] The first conductive plate 5 and the second conductive plate 6 are, for example, metal conductors and are also called bus bars. The plurality of first conductive plates 5 are provided on the base 11, one between adjacent partition plates 14 and one between each side wall 12 and its adjacent partition plate 14. The plurality of first conductive plates 5 are arranged in a row in the left-right direction (column direction) on the rear side of the base 11. An electric wire 103 is electrically connected to the underside of each first conductive plate 5.

[0042] The plurality of second conductive plates 6 are provided on base 11, one each between adjacent partition plates 14 and between each side wall 12 and its adjacent partition plate 14. In this embodiment, the plurality of second conductive plates 6 are arranged in a row in the left-right direction (the other row direction) at positions slightly forward and above first conductive plate 5 of base 11. As a result, the plurality of second conductive plates 6 are arranged parallel to the plurality of first conductive plates 5, closer to the interior of terminal block 4 than the plurality of first conductive plates 5. An electric wire 103 is electrically connected to the underside of each second conductive plate 6.

[0043] The first bolt 7 and the second bolt 8 are, for example, metal conductors. The multiple first bolts 7 and the multiple second bolts 8 are fastened to the terminal block 4 from below. Specifically, each of the multiple first bolts 7 is fastened from below the electric wire 103 arranged on the lower surface of each first conductive plate 5. The head 7a of the first bolt 7 clamps and fixes the electric wire 103 between itself and the lower surface of the first conductive plate 5 (see also FIG. 5). Similarly, each of the multiple second bolts 8 is fastened from below the electric wire 103 arranged on the lower surface of each second conductive plate 6. The head 8a of the second bolt 8 clamps and fixes the electric wire 103 between itself and the lower surface of the second conductive plate 6 (see also FIG. 11).

[0044] As described above, each of the electric wires 103 electrically connected to the first conductive plate 5 and the second conductive plate 6 is fixed to the terminal block 4 by the first bolt 7 and the second bolt 8. Furthermore, with each of the electric wires 103 fixed to the terminal block 4 in this manner, the heads 8a of the plurality of second bolts 8 are disposed on the inner side (above) of the terminal block 4 relative to the heads 7a of the plurality of first bolts 7.

[0045] The first cover member 20 and the second cover member 40 are made of an insulator such as synthetic resin. The first cover member 20 is attached to the terminal block 4 in a state where it covers the heads 7a of the plurality of first bolts 7 from below. The second cover member 40 is attached to the terminal block 4 in a state where it covers the heads 8a of the plurality of second bolts 8 from below. The second cover member 40 of this embodiment is inserted into the interior of the terminal block 4 from the side of the terminal block 4 (the left side in the illustrated example) and covers the heads 8a of the plurality of second bolts 8 from below.

[0046] [Configuration of first cover member and its surroundings] As shown in FIG. 3, the terminal block 4 has a plurality of downward protrusions 15 (four in FIG. 3) that protrude downward beyond the heads 7a of the plurality of first bolts 7. In this embodiment, each downward protrusion 15 is integrally formed with the lower end of each partition plate 14. As a result, each downward protrusion 15 in this embodiment is made part of each partition plate 14. A lateral protrusion 16 that protrudes laterally is provided on the outer surface of each side wall 12 of the terminal block 4 (see also FIG. 5). A first cover member 20 is attached to the downward protrusions 15 and the lateral protrusions 16. Details thereof will be described below.

[0047] FIG. 4 is a plan view of the terminal block 4 as viewed from below. FIG. 5 is a cross-sectional view taken along arrow II in FIG. 4. In FIGS. 4 and 5, the first cover member 20 is made of, for example, a flat plate member with both left and right ends bent. Specifically, the first cover member 20 has a first cover main body 21 extending in the left-right direction and a pair of left and right first cover side bodies 22 extending in the up-down direction. The first cover main body 21 is positioned at the lower end of the terminal block 4 in a position covering the heads 7a of the multiple first bolts 7. Each first cover side body 22 extends upward from each of the left and right ends of the first cover main body 21. Each first cover side body 22 is positioned along the outer surface of the side wall 12 on the side of the terminal block 4.

[0048] 6 is a plan view of the first cover member 20 as viewed from below. In FIGS. 5 and 6, a plurality of (four in the illustrated example) lower fitting holes 23 penetrating in the vertical direction are formed in the first cover body 21 of the first cover member 20 at intervals in the left-right direction. Each lower fitting hole 23 is formed, for example, in a substantially rectangular shape that is long in the front-rear direction in plan view. The lower protrusions 15 of each partition plate 14 are fitted into each of the plurality of lower fitting holes 23 from above. By attaching the first cover body 21 to the terminal block 4 using this fitting configuration, the vertical dimension of the electrical junction box 1 can be reduced.

[0049] The first cover member 20 has a plurality of side surface contact portions 24 provided in predetermined lower fitting holes 23. The first cover body 21 of this embodiment has, as the plurality of side surface contact portions 24, a side surface contact portion 24A provided on the left side surface 23a of the left-end lower fitting hole 23 and a side surface contact portion 24B provided on the right side surface 23b of the right-end lower fitting hole 23. The side surface contact portion 24A is provided at the center of the side surface 23a in the front-rear direction, protruding to the right. The side surface contact portion 24B is provided at the center of the side surface 23b in the front-rear direction, protruding to the left. The side surface contact portion 24A and the side surface contact portion 24B have bilaterally symmetrical shapes, so the following describes the details of the side surface contact portion 24A.

[0050] Fig. 7 is an enlarged cross-sectional view of part II in Fig. 5. In Fig. 7, side surface contact portion 24A has a protruding end surface 241 that contacts left side surface 15a of downward protrusion 15 when downward protrusion 15 is fitted into lower fitting hole 23. Side surface contact portion 24B (see Fig. 5) provided in lower fitting hole 23 at the right end has a protruding end surface 241 that contacts right side surface 15b of downward protrusion 15 that is fitted into said lower fitting hole 23.

[0051] A pair of upper and lower inclined surfaces 242, 243 are formed on the protruding end surface 241. In this embodiment, each of the inclined surfaces 242, 243 is linearly inclined in the cross-sectional view of Fig. 7. The inclined surface (contact-side inclined surface) 242 is inclined upward on the upper side of the protruding end surface 241 toward the side surface 23a of the lower fitting hole 23. The inclined surface 243 is inclined downward on the lower side of the protruding end surface 241 toward the side surface 23a of the lower fitting hole 23. Note that each of the inclined surfaces 242, 243 may be inclined in an arc shape in the cross-sectional view.

[0052] Fig. 8 is an enlarged cross-sectional view of part III in Fig. 6. In Fig. 7 and Fig. 8, the protruding end surface 241 of the side surface contact portion 24A has an arcuate surface 241a formed in an arc shape in a plan view. In this embodiment, the arcuate surface 241a is formed in the center of the protruding end surface 241 in the front-to-rear direction, between a pair of upper and lower inclined surfaces 242, 243. The arcuate surface 241a makes line contact with the side surface 15a of the downward protrusion 15 in the up-down direction.

[0053] 7, the contact length L1 of the protruding end surface 241 of the side surface contact portion 24A is equal to or less than half the contact length L2 of the side surface 15a of the downward protrusion 15. The contact length L1 is the vertical length over which the protruding end surface 241 of the side surface contact portion 24A contacts the side surface 15a of the downward protrusion 15 when the downward protrusion 15 is fitted into the lower fitting hole 23. The contact length L2 is the vertical length over which the side surface 15a of the downward protrusion 15 contacts the protruding end surface 241 of the side surface contact portion 24A when the downward protrusion 15 is fitted into the lower fitting hole 23.

[0054] A pair of left and right inclined surfaces 15c, 15d are formed at the lower end of the downward protrusion 15 so that the thickness of the downward protrusion 15 gradually decreases in the left-right direction. In this embodiment, each of the inclined surfaces 15c, 15d is linearly inclined in cross-sectional view. The inclined surface (protrusion-side inclined surface) 15c is inclined downward and toward the right at the lower end of the left side surface 15a of the downward protrusion 15. The inclined surface 15d is inclined downward and toward the left at the lower end of the right side surface 15b of the downward protrusion 15. Note that each of the inclined surfaces 15c, 15d may be inclined in an arcuate shape in cross-sectional view. Furthermore, it is sufficient that at least the inclined surface 15c is formed at the lower end of the downward protrusion 15.

[0055] 9 is an enlarged perspective view of portion IV in FIG. 2. In FIGS. 5 and 9, each first cover side body 22 of the first cover member 20 has a side fitting hole 25 formed therethrough in the left-right direction. In this embodiment, the side fitting hole 25 is formed from each of the longitudinal end portions of the first cover main body 21 to the upper end portion of each first cover side body 22. The side protrusion 16 of the opposing side wall 12 is fitted into the side fitting hole 25 of each first cover side body 22 from the inside in the left-right direction. Specifically, the side fitting hole 25 of the left first cover side body 22 is fitted into the side fitting hole 25 of the left side wall 12 from the right side. The side fitting hole 25 of the right first cover side body 22 is fitted into the side protrusion 16 of the right side wall 12 from the left side.

[0056] 6 and 9, the first cover member 20 has an upper surface contact portion 26 provided in the side fitting hole 25 of each first cover side body 22. The upper surface contact portion 26 is provided to protrude downward from the upper surface 25a of the side fitting hole 25. The upper surface contact portion 26 of the left first cover side body 22 and the upper surface contact portion 26 of the right first cover side body 22 have bilaterally symmetrical shapes, so below, the upper surface contact portion 26 of the left first cover side body 22 will be described in detail.

[0057] 10 is an enlarged cross-sectional view of portion V in FIG. 5. In FIG. 10, the upper surface contact portion 26 is formed to contact the upper surface 16a of the lateral protrusion 16 when the lateral protrusion 16 is fitted into the lateral fitting hole 25. A first inclined surface 262 and a second inclined surface 263 are formed on the lower surface 261 of the upper surface contact portion 26. In this embodiment, the first inclined surface 262 is linearly inclined in cross-sectional view. Specifically, the first inclined surface 262 is inclined upward on the right side of the lower surface 261 of the upper surface contact portion 26, toward the right side, which is opposite the fitting direction of the lateral protrusion 16. Note that the first inclined surface 262 may be inclined in an arcuate shape in cross-sectional view.

[0058] The second inclined surface 263 is inclined in the same direction as the first inclined surface 262 on the left side of the first inclined surface 262 (the fitting direction side of the lateral protrusion 16). That is, the second inclined surface 263 is inclined upward toward the right side. In this embodiment, the second inclined surface 263 is inclined in an arc shape in cross-section and is inclined more gently than the first inclined surface 262. The right end of the second inclined surface 263 is connected to the left end of the first inclined surface 262, and the second inclined surface 263 and the first inclined surface 262 are formed to be approximately flush. The second inclined surface 263 comes into contact with the upper surface 16 a of the lateral protrusion 16 when the lateral protrusion 16 is fitted into the side fitting hole 25. Note that each second inclined surface 263 may be inclined linearly in cross-section.

[0059] [Configuration of second cover member and its surroundings] Fig. 11 is a cross-sectional view taken along the line VI-VI in Fig. 4. In Fig. 11, the terminal block 4 of this embodiment has a pair of upper support portions 17, a pair of lower support portions 18, and a plurality of (three in Fig. 11) intermediate support portions 19. The pair of upper support portions 17 support a second cover body 41 (described below) of the second cover member 40 from above. The pair of lower support portions 18 and the plurality of intermediate support portions 19 support the second cover body 41 from below.

[0060] The pair of upper support portions 17 are arranged with a gap between them in the left-right direction. The pair of upper support portions 17 consists of upper support portion 17A provided at the left end of base 11 and upper support portion 17B provided at the right end of base 11. The left upper support portion 17A is, for example, a flat plate member extending in the left-right direction. The right upper support portion 17B is, for example, a flat plate member extending in the up-down direction. A lower surface 171 of upper support portion 17A and a lower surface 172 of upper support portion 17B each protrude downward beyond the heads 8a of the multiple second bolts 8.

[0061] The pair of lower support portions 18 are arranged with a gap between them in the left-right direction. The pair of lower support portions 18 consists of a lower support portion 18A provided at the left end of the base 11 and a lower support portion 18B provided at the right end of the base 11. In this embodiment, the lower support portion 18A is formed integrally with the left side wall 12 and is a part of the side wall 12. The lower support portion 18B is formed integrally with the upper side of the partition plate 14 located at the right end and is a part of the partition plate 14. The lower support portion 18A is arranged below the upper support portion 17A with a gap between them. The lower support portion 18B is arranged below the upper support portion 17B with a gap between them.

[0062] The multiple intermediate support portions 19 are arranged at intervals in the left-right direction between the pair of lower support portions 18A, 18B. The multiple intermediate support portions 19 have the same shape. In this embodiment, each intermediate support portion 19 is formed integrally with the upper end of each partition plate 14 (except for the partition plate 14 arranged at the right end) and is made part of that partition plate 14.

[0063] FIG. 12 is a plan view of the second cover member 40 as viewed from below. In FIGS. 11 and 12, the second cover member 40 includes a second cover body 41, a head portion 42, and a restricting portion 43. The second cover body 41 is, for example, a substantially rectangular bar-shaped member. The second cover body 41 extends in the left-right direction so as to cover the heads 8a of the second bolts 8. The vertical thickness of the second cover body 41 is slightly smaller than the vertical distance between the upper support portion 17A and the lower support portion 18A and the vertical distance between the upper support portion 17B and the lower support portion 18B. This allows the second cover body 41 to be inserted into the interior of the terminal block 4 from the left side of the terminal block 4, passing between the upper support portion 17A and the lower support portion 18A and between the upper support portion 17B and the lower support portion 18B.

[0064] Figure 13 is a cross-sectional view taken along the line VII-VII in Figure 12. In Figures 12 and 13, the head portion 42 is fixed to one longitudinal end (here, the left end) of the second cover body 41. The head portion 42 is a portion that is gripped when inserting the second cover body 41 into the terminal block 4. The head portion 42 is formed, for example, in a substantially rectangular parallelepiped shape. An upper surface 42a of the head portion 42 is flush with the upper surface 41a of the second cover body 41. A lower surface 42b of the head portion 42 protrudes downward beyond the lower surface 41b of the second cover body 41.

[0065] 12, the length of the head portion 42 in the front-rear direction is longer than the length of the second cover body 41 in the front-rear direction. A pair of abutment surfaces 42c that protrude further forward and rearward than the second cover body 41 are formed on the right side surface of the head portion 42. As shown in FIG. 4, the pair of abutment surfaces 42c come into contact with a pair of abutted portions 4a provided on the terminal block 4 when the second cover body 41 is inserted to the appropriate position in the terminal block 4 (the position shown in FIG. 11). This makes it possible to prevent the second cover body 41 from being inserted deeper than the appropriate position.

[0066] 12 and 13, the restricting portion 43 restricts the second cover body 41 from slipping out of the terminal block 4. The restricting portion 43 in this embodiment is formed by cutting out a portion of the left side of the second cover body 41 in a generally C-shape in plan view. The restricting portion 43 has an arm portion 44 extending in the left-right direction and a protrusion portion 45 provided on the arm portion 44.

[0067] The base end 44a of the arm portion 44 is integrally connected to the second cover main body 41. The tip 44b of the arm portion 44 is separated from the second cover main body 41 by cutting out the second cover main body 41 as described above. This allows the tip 44b of the arm portion 44 to elastically deform so as to swing up and down with the base end 44a as a fulcrum.

[0068] In a normal state (the state shown in FIG. 13) in which the arm portion 44 does not swing, the protrusion portion 45 protrudes downward from the lower surface 41b of the second cover main body 41. The protrusion portion 45 has an inclined surface 45a formed on the right side and a stopper surface 45b formed on the left side. The inclined surface 45a slopes linearly upward as it extends to the right. The stopper surface 45b extends vertically with almost no inclination.

[0069] With the above configuration, when the second cover body 41 is inserted into the terminal block 4, the inclined surface 45a of the protrusion 45 of the restricting portion 43 abuts against the lower support portion 18A (see FIG. 11) of the terminal block 4, causing the arm portion 44 of the restricting portion 43 to swing upward together with the protrusion 45. As a result, the protrusion 45 climbs over the lower support portion 18A and moves toward the inside of the terminal block 4. When the protrusion 45 climbs over the lower support portion 18A, the arm portion 44 swings downward to return to its normal state, and the stopper surface 45b of the protrusion 45 is positioned on the right side of the lower support portion 18A (see FIG. 15). As a result, even if the second cover body 41 moves in the direction of coming out of the terminal block 4 (to the left), the stopper surface 45b abuts against the side surface of the lower support portion 18A, preventing the second cover body 41 from coming out of the terminal block 4. When it is desired to remove the second cover body 41 from the terminal block 4, the second cover body 41 can be removed from the terminal block 4 by manually pressing the protrusion 45 of the restricting portion 43 upward.

[0070] Fig. 14 is a plan view of the second cover member 40 as viewed from above. In Fig. 14, the second cover member 40 has a plurality of upper contact portions 46 provided on the upper surface 41a of the second cover main body 41. The second cover member 40 of this embodiment has, as the plurality of upper contact portions 46, a pair of front and rear upper contact portions 46A provided on the left end of the upper surface 41a of the second cover main body 41, and a pair of front and rear upper contact portions 46B provided on the right end of the upper surface 41a of the second cover main body 41. The pair of upper contact portions 46A have the same shape. The pair of upper contact portions 46B also have the same shape.

[0071] Fig. 15 is an enlarged cross-sectional view of portion VIII in Fig. 11. In Figs. 14 and 15, upper contact portion 46A protrudes upward from upper surface 41a of second cover main body 41 and extends in the left-right direction. Upper contact portion 46A has an upper surface 461 that contacts lower surface 171 of upper support portion 17A. Upper surface 461 of upper contact portion 46A is a flat surface parallel to lower surface 171 of upper support portion 17A, and a portion (left portion) of upper surface 461 is in surface contact with lower surface 171 of upper support portion 17A.

[0072] An upper inclined surface 462 is formed on the right side of the upper surface 461 of the upper contact portion 46A. In this embodiment, the upper inclined surface 462 is inclined linearly in the side view of Fig. 15. The upper inclined surface 462 is inclined downward toward the right side (insertion tip side) of the second cover main body 41. Note that the upper inclined surface 462 may be inclined in an arc shape in the side view.

[0073] Fig. 16 is an enlarged cross-sectional view of portion IX in Fig. 11. In Fig. 14 and Fig. 16, the upper contact portion 46B protrudes upward from the upper surface 41a of the second cover main body 41 and extends in the left-right direction. The upper contact portion 46B has an upper surface 463 that contacts the lower surface 172 of the upper support portion 17B. The upper surface 463 of the upper contact portion 46B is a flat surface parallel to the lower surface 172 of the upper support portion 17B, and a portion of the upper surface 463 (a central portion in the left-right direction) is in surface contact with the lower surface 172 of the upper support portion 17B.

[0074] An upper inclined surface 464 is formed on the right side of the upper surface 463 of the upper contact portion 46B. In this embodiment, the upper inclined surface 464 is inclined linearly in side view in Fig. 16. The upper inclined surface 464 is inclined downward toward the right side (insertion tip side) of the second cover main body 41. Note that the upper inclined surface 464 may be inclined in an arc shape in side view.

[0075] In FIG. 16, a pair of left and right inclined surfaces 173, 174 are formed on the lower surface 172 of the upper support portion 17B. In this embodiment, the inclined surfaces 173, 174 are linearly inclined in side view. The inclined surface (upper support-side inclined surface) 173 is inclined upward toward the side opposite to the insertion direction of the second cover main body 41 (left side). The inclined surface 174 is inclined upward toward the insertion direction of the second cover main body 41 (right side). Note that the inclined surfaces 173, 174 may be inclined in an arc shape in side view. It is sufficient that at least the inclined surface 173 is formed on the lower surface 172 of the upper support portion 17B.

[0076] 12, the second cover member 40 has lower contact portions 47 provided on the lower surface 41b of the second cover main body 41. The second cover member 40 of this embodiment has, as the multiple lower contact portions 47, a pair of front and rear lower contact portions 47A provided on the left end of the lower surface 41b of the second cover main body 41 and a pair of front and rear lower contact portions 47B provided on the right end of the lower surface 41b of the second cover main body 41. The pair of lower contact portions 47A have the same shape and are formed vertically symmetrically with the upper contact portion 46A. The pair of lower contact portions 47B have the same shape and are formed vertically symmetrically with the upper contact portion 46B.

[0077] 12 and 15, lower contact portion 47A protrudes downward from lower surface 41b of second cover main body 41 and extends in the left-right direction. Lower contact portion 47A has a lower surface 471 that contacts upper surface 181 of lower support portion 18A. Lower surface 471 of lower contact portion 47A is a flat surface that is parallel to upper surface 181 of lower support portion 18A, and a portion (right portion) of lower surface 471 is in surface contact with upper surface 181 of lower support portion 18A.

[0078] A lower inclined surface 472 is formed on the right side of the lower surface 471 of the lower contact portion 47A. In this embodiment, the lower inclined surface 472 is inclined linearly in the side view of Fig. 15. The lower inclined surface 472 is inclined upward toward the right side (insertion tip side) of the second cover main body 41. Note that the lower inclined surface 472 may be inclined in an arc shape in the side view.

[0079] 12 and 16, the lower contact portion 47B protrudes downward from the lower surface 41b of the second cover main body 41 and extends in the left-right direction. The lower contact portion 47B has a lower surface 473 that comes into contact with the upper surface 182 of the lower support portion 18B. The lower surface 473 of the lower contact portion 47B is a flat surface that is parallel to the upper surface 182 of the lower support portion 18B, and a portion of the lower surface 473 (a central portion in the left-right direction) comes into surface contact with the upper surface 182 of the lower support portion 18B.

[0080] A lower inclined surface 474 is formed on the right side of the lower surface 473 of the lower contact portion 47B. In this embodiment, the lower inclined surface 474 is linearly inclined in side view in Fig. 16. The lower inclined surface 474 is inclined upward toward the right side (insertion tip side) of the second cover main body 41. Note that the lower inclined surface 474 may be inclined in an arc shape in side view.

[0081] 15, an inclined surface (lower support-side inclined surface) 183 is formed on an upper surface 181 of the lower support part 18A. In this embodiment, the inclined surface 183 is inclined in an arc shape in side view. The inclined surface 183 is inclined downward as it moves toward the opposite side (left side) from the insertion direction of the second cover main body 41. Note that the inclined surface 183 may also be inclined linearly in side view.

[0082] 16, an inclined surface (lower support-side inclined surface) 184 is formed on an upper surface 182 of the lower support portion 18B. In this embodiment, the inclined surface 184 is inclined in an arc shape in side view. The inclined surface 184 is inclined downward as it moves toward the opposite side (left side) from the insertion direction of the second cover main body 41. Note that the inclined surface 184 may also be inclined linearly in side view.

[0083] 11 and 16, the upper surface 19a of the intermediate support portion 19 is positioned lower than the upper surface 181 of the lower support portion 18A and the upper surface 182 of the lower support portion 18B. As a result, the gap between the upper surface 19a of the intermediate support portion 19 and the lower surface 41b of the second cover main body 41 is larger than the gap between the upper surfaces 181, 182 of the lower support portions 18A, 18B and the lower surface 41b of the second cover main body 41.

[0084] 16, an inclined surface (intermediate inclined surface) 19b is formed on the upper surface 19a of the intermediate support part 19. In this embodiment, the inclined surface 19b is inclined in an arc shape in side view. The inclined surface 19b is inclined downward as it goes toward the opposite side (left side) from the insertion direction of the second cover main body 41.

[0085] [Effects of this embodiment]

[0086] According to the electrical junction box 1 of this embodiment, the heads 7a of the plurality of first bolts 7 that secure the electric wires 103 electrically connected to the first conductive plate 5 to the terminal block 4 are covered from below by the first cover member 20. Furthermore, the heads 8a of the plurality of second bolts 8 that secure the electric wires 103 electrically connected to the second conductive plate 6 to the terminal block 4 are covered from below by the second cover member 40. As a result, even if the first bolts 7 loosen relative to the terminal block 4, the heads 7a of the first bolts 7 abut against the first cover member 20, thereby preventing the first bolts 7 from falling off the terminal block 4. Similarly, even if the second bolts 8 loosen relative to the terminal block 4, the heads 8a of the second bolts 8 abut against the second cover member 40, thereby preventing the second bolts 8 from falling off the terminal block 4. Furthermore, the first cover member 20 and the second cover member 40 collectively cover the heads 7a of the plurality of first bolts 7 and the heads 8a of the plurality of second bolts 8, respectively. This reduces the number of components, simplifying the configuration of the electrical junction box 1.

[0087] The second cover member 40 is inserted from the side of the terminal block 4 to the inside, so that even if the head 8a of the second bolt 8 is positioned closer to the inside of the terminal block 4 than the head 7a of the first bolt 7, the second cover member 40 can cover the head 8a of the second bolt 8.

[0088] The lower projection 15 of the terminal block 4 is fitted to the side surfaces 23a and 23b of the lower fitting hole 23 of the first cover body 21. 23 The first cover member 20 has a side contact portion 24 that comes into contact with the side surfaces 15a, 15b of the downward protrusion 15 when the first cover member 20 is fitted into the lower fitting hole 23. Therefore, even if a dimensional error occurs in either the downward protrusion 15 of the terminal block 4 or the lower fitting hole 23 of the first cover body 21, the side contact portion 24 can come into contact with the side surface 15a of the downward protrusion 15 when the downward protrusion 15 is fitted into the lower fitting hole 23. This makes it possible to prevent the first cover member 20 from rattling in the left-right direction relative to the downward protrusion 15, thereby suppressing the generation of abnormal noise caused by the rattle.

[0089] The downward protrusion 15 of the terminal block 4 is made to be part of the partition plate 14 that insulates adjacent first bolts 7. This eliminates the need for the terminal block 4 to be provided with a separate downward protrusion 15, thereby further simplifying the configuration of the electrical junction box 1.

[0090] Side surface 15a of the downward protrusion 15 ,15b The lower protrusion 15 has inclined surfaces 15c and 15d formed on the first cover body 21, which are inclined so that the thickness of the lower protrusion 15 gradually decreases in the left-right direction. This allows the lower protrusion 15 to be smoothly fitted into the lower fitting hole 23 of the first cover body 21.

[0091] An inclined surface 242 is formed on the protruding end surface 241 of the side surface contact portion 24, and is inclined upward toward the side surface 23a of the lower fitting hole 23. This allows the lower protrusion 15 to be fitted into the lower fitting hole 23 of the first cover body 21 even more smoothly.

[0092] The protruding end surface 241 of the side surface contact portion 24 has an arcuate surface 241a that is in line contact with the side surface 15a of the downward protrusion 15. Therefore, the contact surface pressure between the side surface contact portion 24 and the downward protrusion 15 can be increased compared to when the side surface contact portion 24 is in surface contact with the side surface 15a of the downward protrusion 15. This further reduces rattling of the first cover member 20 in the left-right direction relative to the downward protrusion 15.

[0093] The contact length L1 in the vertical direction where the protruding end face 241 of the side contact portion 24 comes into contact with the side face 15a of the lower protrusion 15 is equal to or less than half the contact length L2 in the vertical direction where the side face 15a of the lower protrusion 15 comes into contact with the protruding end face 241. This shortens the contact length L1, allowing the lower protrusion 15 to be fitted into the lower fitting hole 23 even more smoothly.

[0094] An upper surface 25a of the side fitting hole 25 of the first cover side body 22 is provided with an upper surface contact portion 26 that comes into contact with the upper surface 16a of the lateral protrusion 16 when the lateral protrusion 16 of the terminal block 4 is fitted into the side fitting hole 25. Therefore, even if a dimensional error occurs in either the lateral protrusion 16 of the terminal block 4 or the side fitting hole 25 of the first cover side body 22, the upper surface contact portion 26 can come into contact with the upper surface 16a of the lateral protrusion 16 when the lateral protrusion 16 is fitted into the side fitting hole 25. This makes it possible to prevent the first cover member 20 from rattling in the up-down direction relative to the lateral protrusion 16, thereby suppressing the generation of abnormal noise caused by such rattling.

[0095] A first inclined surface 262 that slopes upward toward the right is formed on the lower surface 261 of the upper surface contact portion 26. This allows the side protrusion 16 to be smoothly fitted into the side fitting hole 25 of the first cover side body 22.

[0096] A second inclined surface 263 is formed on the lower surface 261 of the upper surface contact portion 26, on the left side of the first inclined surface 262, inclined in the same direction as the first inclined surface 262, and in contact with the upper surface 16a of the lateral protrusion 16. This second inclined surface 263 can increase the probability that the upper surface contact portion 26 will come into contact with the lateral protrusion 16.

[0097] The second inclined surface 263 of the upper surface contact portion 26 is more gently inclined than the first inclined surface 262. This gently inclined second inclined surface 263 comes into contact with the lateral protrusion 16, making it easier to maintain contact between the upper surface contact portion 26 and the lateral protrusion 16. This makes it possible to prevent the lateral protrusion 16 from coming out of the lateral fitting hole 25.

[0098] An upper surface 41a of the second cover body 41 is provided with an upper contact portion 46 that comes into contact with the lower surfaces 171, 172 of the upper support portion 17 of the terminal block 4. Furthermore, a lower surface 41b of the second cover body 41 is provided with a lower contact portion 47 that comes into contact with the upper surfaces 181, 182 of the lower support portion 18 of the terminal block 4. Therefore, even if a dimensional error occurs in any of the upper support portion 17 and the lower support portion 18 of the terminal block 4 and the second cover body 41, the upper contact portion 46 can come into contact with the lower surfaces 171, 172 of the upper support portion 17, and the lower contact portion 47 can come into contact with the upper surfaces 181, 182 of the lower support portion 18. This makes it possible to prevent the second cover member 40 from rattling in the up-down direction relative to the terminal block 4, thereby suppressing the generation of abnormal noise caused by the rattle.

[0099] The lower support portion 18 is formed as part of the partition plate 14 that insulates adjacent first bolts 7 from each other. This eliminates the need for the terminal block 4 to be provided with a separate lower support portion 18, thereby further simplifying the configuration of the electrical junction box 1.

[0100] Upper inclined surfaces 462, 464 that slope downward toward the right side of the second cover body 41 are formed on the upper surfaces 461, 463 of the upper contact portion 46. This allows the second cover member 40 to be inserted smoothly into the terminal block 4.

[0101] An inclined surface 173 is formed on the lower surface 172 of the upper support portion 17B, and is inclined upward toward the left side of the second cover body 41. This allows the second cover member 40 to be inserted into the terminal block 4 more smoothly.

[0102] Lower inclined surfaces 472, 474 that slope upward toward the right side of the second cover body 41 are formed on the lower surfaces 471, 473 of the lower contact portion 47. This allows the second cover member 40 to be inserted into the terminal block 4 more smoothly.

[0103] The upper surfaces 181, 182 of the lower support part 18 are formed with inclined surfaces 183, 184 that slope downward toward the left side of the second cover body 41. This allows the second cover member 40 to be inserted into the terminal block 4 more smoothly.

[0104] The upper surface 19a of the intermediate support portion 19 disposed between the pair of left and right lower support portions 18 is positioned lower than the upper surfaces 181, 182 of the lower support portions 18. Therefore, when the second cover member 40 is inserted from the side of the terminal block 4, the second cover body 41 and the lower contact portion 47 can be prevented from coming into contact with the upper surface 19a of the intermediate support portion 19 of the terminal block 4. This allows the second cover member 40 to be inserted into the terminal block 4 more smoothly.

[0105] An inclined surface 19b is formed on the upper surface 19a of the intermediate support portion 19, and is inclined downward toward the left side of the second cover body 41. This allows the second cover member 40 to be inserted into the terminal block 4 more smoothly.

[0106] When the second cover member 40 is inserted into the terminal block 4, the restricting portion 43 restricts the second cover member 40 from coming out of the terminal block 4. This makes it possible to prevent the second bolt 8 from falling off the terminal block 4.

[0107] [others] Although the second cover member 40 in this embodiment is inserted into the interior from the left side of the terminal block 4, this is not limiting. For example, the second cover member 40 may be inserted into the interior from the right side of the terminal block 4, or may be attached to the terminal block 4 from below the terminal block 4, similar to the first cover member 20, as long as it does not interfere with the first cover member 20. Furthermore, the second cover member 40 has upper contact portions 46 and lower contact portions 47 that suppress rattle in the up-down direction relative to the terminal block 4, but may also have other contact portions that suppress rattle in the left-right direction relative to the terminal block 4.

[0108] The numbers of the lower fitting holes 23 and the side fitting holes 25 of the first cover member 20 are arbitrary and can be changed freely. Similarly, the numbers of the lower protrusions 15, the side protrusions 16, and the intermediate support portions 19 of the terminal block 4 are arbitrary and can be changed freely. The lower protrusions 15, the lower support portions 18B, and the intermediate support portions 19 of the terminal block 4 may be provided separately from the partition plate 14.

[0109] In this embodiment, the plurality of first conductive plates 5 and the plurality of second conductive plates 6 are arranged in a line in the left-right direction, but this is not limiting and they may be arranged in a line in the front-rear direction, for example. In addition, the plurality of second conductive plates 6 in this embodiment are arranged in a line parallel to the plurality of first conductive plates 5. column However, the present invention is not limited to this, and the first conductive plates 5 may be arranged in the front-rear direction perpendicular to the first conductive plates 5, for example.

[0110] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above meaning, and is intended to include any modifications within the scope of the claims and meaning equivalent to the claims. [Explanation of symbols]

[0111] 1 Electrical junction box 2. Electrical Components 3 Connectors 4 Terminal block 4a Contacted part 5. First conductive plate (first conductive member) 6 Second conductive plate (second conductive member) 7 First Bolt 7a head 8 Second bolt 8a head 11 Foundation 12 Side wall 13 Signboard 14 Divider 15 Downward protrusion 15a side 15b Side 15c Inclined surface (projection side inclined surface) 15d slope 16 Lateral protrusion 16a Top side 17 Upper support part 17A Upper support part 17B Upper support part 18 Lower support part 18A Lower support part 18B Lower support part 19 Intermediate support part 19a Top side 19b Slope (intermediate slope) 20 First cover member 21 First cover body 22 First cover side body 23 Lower fitting hole 23a side 23b Side 24 Side contact part 24A Side contact part 24B Side contact part 25 Side fitting hole 25a Top 26 Top contact part 40 second cover member 41 Second cover body 41a Top side 41b Bottom side 41c Notch 42 Head 42a Top side 42b Bottom side 42c Contact surface 43 Regulatory Department 44 Arm section 44a proximal end 44b tip 45 Protrusion 45a Slope 45b Stopper surface 46 Upper contact part 46A Upper contact part 46B Upper contact part 47 Lower contact part 47A Upper contact part 47B Upper contact part 100 vehicles 101 Electricity storage device 102 Vehicle load 103 Wires 104p wire 104n wire 105p wire 105n wire 171 below 172 below 173 Inclined surface (upper support side inclined surface) 174 Inclined Surface 181 above 183 Inclined surface (inclined surface of lower support side) 182 above 184 Inclined surface (lower support side inclined surface) 241 protruding end face 241a curved surface 242 Inclined surface (contact side inclined surface) 243 Inclined Surface 261 below 262 First inclined surface 263 Second inclined surface 461 above 462 upper inclined surface 463 above 464 Upper inclined surface 471 below 472 lower inclined surface 473 below 474 lower inclined surface L1 Contact Long L2 contact length

Claims

1. An electrical junction box mounted on a vehicle, A terminal block and a plurality of first conductive members provided on the terminal block and arranged in a line; a plurality of second conductive members provided on the terminal block and arranged in a line; a plurality of first bolts that are fastened to the terminal block from below and fix electric wires electrically connected to the first conductive members to the terminal block; a plurality of second bolts that are fastened to the terminal block from below and fix electric wires electrically connected to the second conductive members to the terminal block; a first cover member provided on the terminal block and covering heads of the first bolts from below; a second cover member provided on the terminal block and covering the heads of the second bolts from below, the terminal block has downward protrusions that protrude downward beyond the heads of the plurality of first bolts, The first cover member is a first cover body extending in a column direction in which the plurality of first conductive members are arranged; a lower fitting hole formed in the first cover body and into which the lower protrusion is fitted; When the lower protrusion is fitted into the lower fitting hole, the lower surface of the lower protrusion is positioned within the lower fitting hole.

2. An electrical junction box mounted on a vehicle, A terminal block and a plurality of first conductive members provided on the terminal block and arranged in a line; a plurality of second conductive members provided on the terminal block and arranged in a line; a plurality of first bolts that are fastened to the terminal block from below and fix electric wires electrically connected to the first conductive members to the terminal block; a plurality of second bolts that are fastened to the terminal block from below and fix electric wires electrically connected to the second conductive members to the terminal block; a first cover member provided on the terminal block and covering heads of the first bolts from below; a second cover member provided on the terminal block and covering the heads of the second bolts from below, the heads of the second bolts are disposed closer to the interior of the terminal block than the heads of the first bolts, The second cover member is inserted into the interior of the terminal block from the side thereof and covers the heads of the second bolts from below.

3. An electrical connection box mounted on a vehicle, A terminal block and a plurality of first conductive members provided on the terminal block and arranged in a line; a plurality of second conductive members provided on the terminal block and arranged in a line; a plurality of first bolts that are fastened to the terminal block from below and fix electric wires electrically connected to the first conductive members to the terminal block; a plurality of second bolts that are fastened to the terminal block from below and fix electric wires electrically connected to the second conductive members to the terminal block; a first cover member provided on the terminal block and covering heads of the first bolts from below; a second cover member provided on the terminal block and covering the heads of the second bolts from below, the terminal block has downward protrusions that protrude downward beyond the heads of the plurality of first bolts, The first cover member is a first cover body extending in a column direction in which the plurality of first conductive members are arranged; a lower fitting hole formed in the first cover body into which the lower protrusion is fitted; a side contact portion that protrudes laterally from a side surface of the lower fitting hole in the column direction and that contacts a side surface of the lower protrusion when the lower protrusion is fitted into the lower fitting hole.

4. The electrical junction box according to claim 3 , wherein the downward protrusion is a part of a partition plate that insulates adjacent first bolts from each other.

5. 5. The electrical connection box according to claim 3, wherein the side surface of the downward protrusion is formed with a protrusion-side inclined surface that is inclined so that the thickness of the downward protrusion in the column direction gradually becomes thinner as it extends downward.

6. 6. The electrical connection box according to claim 3, wherein the protruding end surface of the side contact portion is formed with a contact side inclined surface that slopes upward toward the side surface of the lower fitting hole.

7. 7. The electrical junction box according to claim 3, wherein the protruding end surface of the side surface contact portion has an arcuate surface that makes line contact with the side surface of the downward protrusion.

8. 8. An electrical connection box according to claim 3, wherein when the lower protrusion is fitted into the lower fitting hole, the vertical contact length over which the protruding end face of the side contact portion contacts the side of the lower protrusion is less than half the vertical contact length over which the side of the lower protrusion contacts the protruding end face.

9. An electrical connection box mounted on a vehicle, A terminal block and a plurality of first conductive members provided on the terminal block and arranged in a line; a plurality of second conductive members provided on the terminal block and arranged in a line; a plurality of first bolts that are fastened to the terminal block from below and fix electric wires electrically connected to the first conductive members to the terminal block; a plurality of second bolts that are fastened to the terminal block from below and fix electric wires electrically connected to the second conductive members to the terminal block; a first cover member provided on the terminal block and covering heads of the first bolts from below; a second cover member provided on the terminal block and covering the heads of the second bolts from below, the terminal block has downward protrusions that protrude downward beyond the heads of the plurality of first bolts, The first cover member is a first cover body extending in a column direction in which the plurality of first conductive members are arranged; a lower fitting hole formed in the first cover body and into which the lower protrusion is fitted, The terminal block has a lateral protrusion that protrudes laterally, The first cover member is a first cover side body extending in the vertical direction on a side of the terminal block; a side fitting hole formed in the first cover side body and into which the side protrusion is fitted; an upper surface contact portion that protrudes downward from an upper surface of the side fitting hole and that contacts the upper surface of the side protrusion when the side protrusion is fitted into the side fitting hole.

10. 10. The electrical junction box according to claim 9, wherein a first inclined surface is formed on the lower surface of the upper surface contact portion, the first inclined surface inclining upward in a direction opposite to the fitting direction of the side protrusion.

11. An electrical junction box mounted on a vehicle, A terminal block and a plurality of first conductive members provided on the terminal block and arranged in a line; a plurality of second conductive members provided on the terminal block and arranged in a line; a plurality of first bolts that are fastened to the terminal block from below and fix electric wires electrically connected to the first conductive members to the terminal block; a plurality of second bolts that are fastened to the terminal block from below and fix electric wires electrically connected to the second conductive members to the terminal block; a first cover member provided on the terminal block and covering heads of the first bolts from below; a second cover member provided on the terminal block and covering the heads of the second bolts from below, The terminal block has a lateral protrusion that protrudes laterally, The first cover member is a first cover side body extending in the vertical direction on the side of the terminal block; a side fitting hole formed in the first cover side body and into which the side protrusion is fitted; an upper surface contact portion that is provided to protrude downward from an upper surface of the side fitting hole and that comes into contact with an upper surface of the side protrusion when the side protrusion is fitted into the side fitting hole; a first inclined surface inclined upward toward the opposite side to the fitting direction of the side protrusion is formed on the lower surface of the upper surface contact portion; An electrical connection box in which a second inclined surface is formed on the lower surface of the upper surface contact portion, the second inclined surface being inclined in the same direction as the first inclined surface on the mating direction side of the first inclined surface and contacting the upper surface of the lateral protrusion.

12. The electrical junction box according to claim 11, wherein the second inclined surface is more gently inclined than the first inclined surface.

13. the terminal block has an upper support portion that protrudes downwardly beyond the heads of the second bolts, and a lower support portion that is disposed below the upper support portion and spaced apart from the heads of the second bolts, The second cover member is a second cover body extending in the other row direction in which the plurality of second conductive members are arranged and inserted between the upper support portion and the lower support portion; an upper contact portion that protrudes upward from an upper surface of the second cover body and contacts a lower surface of the upper support portion; The electrical junction box according to claim 2 , further comprising: a lower contact portion that protrudes downward from the lower surface of the second cover body and that contacts the upper surface of the lower support portion.

14. The electrical junction box according to claim 13 , wherein the lower support portion is a part of a partition plate that insulates adjacent first bolts from each other.

15. 15. The electrical connection box according to claim 13, wherein an upper inclined surface is formed on an upper surface of the upper contact portion, the upper inclined surface inclining downward toward the insertion tip of the second cover body.

16. 16. An electrical connection box according to claim 13, wherein an upper support side inclined surface is formed on the lower surface of the upper support portion, the upper support side inclining upward as it approaches the opposite side to the insertion direction of the second cover body.

17. 17. The electrical connection box according to claim 13, wherein a lower inclined surface is formed on the lower surface of the lower contact portion, the lower inclined surface inclining upward toward the insertion tip of the second cover body.

18. 18. An electrical connection box according to claim 13, wherein a lower support side inclined surface is formed on the upper surface of the lower support portion, the lower support side inclining downward as it faces away from the insertion direction of the second cover body.

19. the terminal block has a pair of the lower support portions arranged at an interval in the other row direction, and an intermediate support portion arranged between the pair of the lower support portions, 19. The electrical junction box according to claim 13, wherein an upper surface of the intermediate support portion is located lower than upper surfaces of the lower support portions.

20. 20. The electrical junction box according to claim 19, wherein an upper surface of the intermediate support portion is formed with an intermediate inclined surface that slopes downward toward the opposite side to the insertion direction of the second cover body.

21. 21. The electrical junction box according to claim 2, wherein the second cover member has a restricting portion that restricts the second cover member from slipping off the terminal block.

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