Electrical junction box

Abstract

To provide an electric connection box capable of improving an operability of an operation for housing an electric wire with a terminal into an internal part of the electric connection box.SOLUTION: An electric connection box 1 comprises: an electric wire 40 with a terminal; a case 10 that includes a housing 20 for holding a bus bar 30 in an internal part; and a bolt 51 and a nut 27 that fasten a terminal metal fitting 42 and the bus bar 30 together, and conducts and connects. In the case 10, an electric wire 41 extends in a direction that is near from an inner wall surface 13a of the case 10 from the terminal metal fitting 42, and is curved toward an insertion hole 16 of the case 10. The terminal metal fitting 42 includes: a contact part 45 that is conducted and connected to the bus bar 30; and a fastening part 46 that is fastened to a core wire 43 of the electric wire 41, and is arranged to a position that is near from the inner wall surface 13a from the contact part 45. A bolt 51 and a nut 27 are exposed without being blocked by the housing 20 in axis directions thereof, and functions as a terminal part 70 that can connect an external terminal 61.SELECTED DRAWING: Figure 4

Description

Technical Field

[0004]

[0001] The present invention relates to an electrical connection box.

Background Art

[0002] Conventionally, in an electrical connection box (for example, a relay box) mounted on a vehicle or the like, a terminal fitting of a wire with a terminal is fastened to a bus bar or the like held in a case of the electrical connection box with a bolt to make a conductive connection, and the wire of the wire with a terminal is drawn out of the case and connected to an external power source or the like (for example, a battery) (see, for example, Patent Documents 1 to Patent Documents 1 to 3).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, since the wire of the wire with a terminal connected to an external power source (for example, a battery) generally has a large-diameter conductor core wire, it is difficult to bend it with a small radius of curvature. Therefore, for example, when the internal space of the electrical connection box is narrowed due to the demand for miniaturization and low profile of the electrical connection box, in order to bend the wire so as to fit in the space (for example, so as not to interfere with the lower cover of the electrical connection box), it is required that an operator or the like exert a large external force on the wire. In other words, it is difficult to improve the workability of the work of storing the wire of the wire with a terminal inside the electrical connection box.

[0005] One object of the present invention is to provide an electrical connection box capable of improving the workability of the work of storing the wire of the wire with a terminal inside the electrical connection box. [Means for solving the problem]

[0006] To achieve the aforementioned objectives, the electrical junction box according to the present invention has the following features:

[0007] An electrical junction box comprising: a wire with terminals; a busbar to which the terminal fittings of the wire with terminals are electrically connected; a case having a housing inside for holding the busbar and an insertion hole for inserting the wire of the wire with terminals to the outside; and bolts and nuts for fastening the terminal fittings and the busbar together to electrically connect them, The wire of the aforementioned wire with terminals is Inside the case, extending from the terminal fitting electrically connected to the busbar, toward the inner wall surface of the case, and curving toward the insertion hole of the case, The terminal fittings of the aforementioned wire with terminals are The system includes a contact portion that is electrically connected to the busbar by fastening together with the bolt and nut, and a crimping portion that is crimped onto the core of the electric wire, wherein the crimping portion is positioned closer to the inner wall surface than the contact portion, The bolt and the nut are The bolt and nut are exposed in the axial direction without being obstructed by the housing and function as terminals to which external terminals can be connected. It must be an electrical junction box. [Effects of the Invention]

[0008] According to the electrical connection box of the present invention, the wire of the wire with terminals extends from the terminal fitting toward the inner wall surface of the case (for example, toward the inner wall surface of the lower cover, i.e., downward) and curves toward the insertion hole of the case. On the other hand, because the amount of space inside the case is limited, it is difficult to place the terminal fitting at a position far away from the inner wall surface without restriction (for example, at an upper position). Here, the terminal fitting of the wire with terminals has a contact portion that is electrically connected to the busbar and a crimping portion that is crimped onto the core wire of the wire. The crimping portion is located closer to the inner wall surface than the contact portion (for example, downward). Furthermore, the bolt and nut that fasten the contact portion and the busbar together are exposed in their axial direction without being obstructed by the housing and function as a terminal portion to which an external terminal can be connected. That is, the bolt and nut can be used not only as fasteners that electrically connect the terminal fitting and the busbar, but also as a terminal portion to which an external terminal can be connected. Therefore, compared to, for example, a case where a dedicated terminal section for connecting external terminals is provided on the busbar and positioned around the terminal fitting (for example, above), the terminal fitting can be positioned further away from the inner wall surface (for example, above). As a result, the distance between the crimping portion of the terminal fitting and the inner wall surface increases by the amount the terminal fitting is further away from the inner wall surface. Therefore, the wires extending from the crimping portion can be directed towards the insertion hole without having to bend them with an excessively small radius of curvature. Consequently, with this configuration of electrical junction box, the workability of the process of housing the wires of terminal-equipped wires inside the electrical junction box can be improved.

[0009] The present invention has been briefly described above. Further details of the present invention will be clarified by referring to the accompanying drawings and reading through the embodiments for carrying out the invention described below. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is an exploded perspective view of an electrical junction box according to an embodiment of the present invention. [Figure 2]Figure 2 is a perspective view illustrating the procedure for fastening and securing the contact portion of the terminal fitting on a terminal-equipped electric wire to the fastening portion of the busbar held in the block shown in Figure 1 using bolts (however, the cover that covers the rescue terminal is not shown). [Figure 3] Figure 3 is a top view of the electrical junction box shown in Figure 1 with the upper cover removed (however, the cover covering the rescue terminal is not shown). [Figure 4] Figure 4 shows the main part of the AA section in Figure 3. [Figure 5] Figure 5 is a cross-sectional view of BB in Figure 4. [Figure 6] Figure 6 is a perspective view illustrating the procedure for connecting a pair of clips of a booster cable to the rescue terminals on the electrical junction box shown in Figure 1. [Figure 7] Figure 7 is a diagram corresponding to the AA cross-section in Figure 3, showing the state in which a pair of clips of the booster cable are connected to the rescue terminals of the electrical junction box shown in Figure 1. [Modes for carrying out the invention]

[0011] <Embodiment> The following description will explain an electrical junction box 1 according to an embodiment of the present invention shown in Figure 1, with reference to the drawings. The electrical junction box 1 is typically mounted in a vehicle and used as a branch box for power distribution. The electrical junction box 1 transmits power supplied from a battery (not shown) to a plurality of relays, fuses, etc., installed inside the electrical junction box 1, and also performs the function of distributing it to a plurality of external electronic devices (not shown). The electrical junction box 1 can be applied to vehicles that have an electric motor as a drive source, such as electric vehicles and hybrid vehicles, and in which the drive power supply is mounted in a space other than the space under the hood (for example, the space under the rear seats).

[0012] Hereinafter, for the convenience of explanation, as shown in FIG. 1 and the like, "front", "rear", "left", "right", "upper", and "lower" are defined. The "front-rear direction", "left-right direction", and "upper-lower direction" are orthogonal to each other. Note that these directions are merely defined for the convenience of explanation and do not necessarily correspond to the front-rear direction, left-right direction, and upper-lower direction of the vehicle when the electrical connection box 1 is mounted on the vehicle.

[0013] As shown in FIG. 1, the electrical connection box 1 includes a housing 10 having a plurality of electronic component accommodating portions 14 and 21 inside for accommodating electronic components such as relays. The housing 10 has a substantially rectangular parallelepiped box shape. In this example, the housing 10 is composed of a substantially rectangular frame 11, an upper cover 12 assembled above the frame 11 so as to close the upper opening of the frame 11, and a lower cover 13 assembled below the frame 11 so as to close the lower opening of the frame 11. All of the three components constituting the electrical connection box 1 are resin molded bodies.

[0014] In the right region of the internal space of the frame 11, a plurality of types of electronic component accommodating portions 14 for accommodating electronic components such as relays are integrally provided (see FIG. 1 and the like). The left region of the internal space of the frame 11 functions as a block accommodating portion 15 (see FIG. 1). A resin block 20 separate from the frame 11 is accommodated in the block accommodating portion 15 from below.

[0015] In the block 20, a plurality of types of electronic component accommodating portions 21 for accommodating electronic components such as relays are integrally provided (see FIG. 2 etc.). In the block 20, a rescue terminal 70 (see FIGS. 2, 6, and 7) described later is provided so as to protrude upward from a part of the upper surface of the block 20. As shown in FIG. 6, in the electrical connection box 1 in a state where the block 20 is accommodated in the block accommodating portion 15 and the upper cover 12 is removed, by removing the cover 53 (see FIG. 1) of the rescue terminal 70 or rotating it in a hinge-like manner, the rescue terminal 70 will be exposed to the outside. The rescue terminal 70 is, in this example, electrically connected to the electric wire 41 of the electric wire 40 with a terminal (see FIG. 2) that extends from the inside of the housing 10 to the outside through the electric wire insertion hole 16 provided in a part of the right side wall of the housing 10 (see FIGS. 1, 4, and 6 etc.).

[0016] The electric wire 41 of the electric wire 40 with a terminal is connected to a vehicle battery (not shown). Therefore, for example, by connecting the clip 61 (see FIGS. 6 and 7) of the booster cable 60 connected to another external power source (not shown) to the rescue terminal 70 provided in the electrical connection box 1, it is possible to supply power from the external power source to the vehicle battery.

[0017] As shown in FIG. 2, the electric wire 40 with a terminal is composed of an electric wire 41 and a terminal fitting 42 connected to the terminal of the electric wire 41. The electric wire 41 is composed of a metal core wire 43 and a resin insulating coating 44 covering the outer periphery of the core wire 43 (see FIG. 4). At the terminal of the electric wire 41, the insulating coating 44 is removed and the core wire 43 is exposed.

[0018] The terminal fitting 42 is formed by pressing and bending a single metal plate. As shown in Figure 2, the terminal fitting 42 has an elongated flat plate shape that extends vertically and horizontally and is longer vertically, and consists of a contact portion 45 and a crimping portion 46 located below the contact portion 45. The contact portion 45 is the part that is fastened and fixed to the fastening portion 31, which is part of the busbar 30 described later (see Figure 4, etc.). For this reason, a bolt insertion hole 48 is formed in the contact portion 45 for inserting a bolt 51 (see Figures 2 and 4, etc.) (see Figure 2). A crimping mechanism 49 is integrally provided on the right side of the crimping portion 46 (see Figure 2). The exposed core wire 43 of the end of the electric wire 41 is crimped and fixed to the crimping portion 46 using the crimping mechanism 49 so that the electric wire 41 extends downward from its right side. The crimping mechanism 49 is composed of, for example, a core wire crimping section that crimps and fixes the exposed core wire 43, and a coating crimping section that crimps and fixes the end of the insulating coating 44.

[0019] As shown in Figure 2, block 20 is a resin molded body having a substantially rectangular parallelepiped shape, and a metal plate-shaped busbar 30 is integrated into block 20 by insert molding or press-fitting. The busbar 30 may be a single continuous busbar, or it may be an assembly of multiple busbars electrically connected. While most of the busbar 30 is embedded within block 20, at least a part of it, the fastening portion 31 (see Figures 2 and 4, etc.), is exposed to the outside. The fastening portion 31 is electrically connected to the rest of the busbar 30.

[0020] On the upper surface of the right end of block 20, a pair of front and rear columnar portions 22 projecting upward are integrally provided so as to face each other in the front-rear direction (see Figures 2, 3, and 5, etc.). At least the upper ends of the pair of front and rear columnar portions 22 are integrally connected by a flat plate-shaped portion 23 that extends in the front-rear direction and the up-down direction (see Figure 5, etc.). A fastening portion 31, which is part of the busbar 30, is positioned on the plate-shaped portion 23 so as to cover the right surface (plane) of the plate-shaped portion 23, with a small gap between it and the right surface of the plate-shaped portion 23 in the left-right direction (see Figures 4 and 5, etc.). The fastening portion 31 has a thin, flat plate shape that extends in the front-rear direction and the up-down direction, and is exposed to the right (see Figures 4 and 5, etc.). A bolt insertion hole 32 for inserting a bolt 51 (see Figures 2 and 4, etc.) is formed in the fastening portion 31 (see Figures 4 and 5, etc.).

[0021] A nut-receiving recess 24 is formed on the right side (flat surface) of the upper end of the plate-shaped portion 23, recessing to the left and opening upward. The bottom portion 25 of the nut-receiving recess 24 (a flat plate-shaped portion extending in the front-rear and up-down directions) faces the fastening portion 31 of the busbar 30, with a gap in the left-right direction (axial direction of the nut 27) corresponding to the depth of the nut-receiving recess 24 (see Figure 5). The nut-receiving recess 24 and the fastening portion 31 of the busbar 30 function as a "nut-holding portion" that holds the nut 27 (see Figure 5, etc.) to which the bolt 51 will be fastened.

[0022] The nut 27 is composed of a cylindrical portion 28 extending in the left-right direction and having a fastening hole for receiving the bolt 51, and a flange portion 29 extending from the right end of the cylindrical portion 28 in a direction perpendicular to the left-right direction (see Figure 5, etc.). In this example, the cylindrical portion 28 has a rectangular cylindrical shape, and the flange portion 29 has a rectangular frame shape (see Figure 2, etc.).

[0023] The nut housing recess 24 has a rectangular shape when viewed from the left-right direction (axial direction of the nut 27), corresponding to the outer shape of the flange portion 29 of the nut 27 (see Figure 2, etc.). A notch 26 is formed on the upper end surface of the bottom portion 25 of the nut housing recess 24, which is recessed downwards and opens upwards (see Figures 2, 4, and 5). The notch 26 has a rectangular shape when viewed from the left-right direction (axial direction of the nut 27), corresponding to the outer shape of the cylindrical portion 28 of the nut 27 (see Figure 2, etc.).

[0024] The nut 27 is housed in the "nut holding part" from above. Specifically, the flange portion 29 of the nut 27 is housed in the nut holding recess 24 from above through the upper end opening of the nut holding recess 24, and the cylindrical portion 28 of the nut 27 is housed in the notch 26 from above through the upper end opening of the notch 26. As a result, the nut 27 is held in a non-rotatable state with the flange portion 29 sandwiched between the bottom portion 25 of the nut holding recess 24 and the fastening portion 31 of the busbar 30, and the cylindrical portion 28 exposed in the axial direction (left-right direction) of the nut 27 (see Figures 2, 4, and 5, etc.). When the nut 27 is held in the "nut holding part", the fastening hole of the cylindrical portion 28 is positioned coaxially with the bolt insertion hole 32 of the fastening portion 31 of the busbar 30, to the left of the bolt insertion hole 32 (see Figure 5).

[0025] As shown in Figure 2, the contact portion 45 of the terminal fitting 42 of the wire with terminals 40 is fastened together with the fastening portion 31 of the busbar 30 using a bolt 51 with a washer 52 and a nut 27. In order to fasten the contact portion 45 of the terminal fitting 42 together with the fastening portion 31 of the busbar 30, first, the bolt 51 with a washer 52 is inserted from the right side into the bolt insertion hole 48 of the contact portion 45 of the terminal fitting 42 that is connected to the end of the wire 41. Next, the bolt 51 with a washer 52 that is inserted into the bolt insertion hole 48 is inserted from the right side into the bolt insertion hole 32 and screwed with a predetermined torque into the fastening hole of the nut 27 held in the "nut holding portion". As a result, the contact portion 45 of the terminal fitting 42 is fastened together with the fastening portion 31 of the busbar 30, and the terminal fitting 42 and the busbar 30 are electrically connected. Here, the nut 27 is held in the "nut holding part" by the flange portion 29 being sandwiched between the bottom portion 25 of the nut housing recess 24 of the block 20 and the fastening portion 31 of the busbar 30. Therefore, when fastening the bolt 51 into the fastening hole of the nut 27 (i.e., electrically connecting the terminal fitting 42 to the busbar 30), there is no need to hold the nut 27 in place by the worker's hand, thus improving the work efficiency.

[0026] When the contact portion 45 of the terminal fitting 42 is fastened together with the fastening portion 31 of the busbar 30, as shown in Figures 2, 4, and 5, the bolt 51 and nut 27 are exposed in the axial direction (left-right direction) of the bolt 51 and nut 27 without being obstructed by the block 20. Therefore, the bolt 51 and nut 27, as well as the contact portion 45 and washer 52 of the terminal fitting 42 which are electrically connected to the bolt 51 and nut 27, function as a rescue terminal 70 (see Figure 7, etc.) to which the clip 61 of the booster cable 60 (see Figures 6 and 7) can be connected. Thus, the bolt 51 and nut 27 are used not only as fasteners to electrically connect the terminal fitting 42 and the busbar 30, but also as a rescue terminal 70 to which the clip 61 of the booster cable 60 can be connected. If necessary, a resin cover 53 (see Figure 1) that covers the rescue terminal 70 (i.e., the bolt 51, nut 27, contact portion 45, and washer 52) together may be provided.

[0027] When the contact portion 45 of the terminal fitting 42 is fastened and fixed to the fastening portion 31 of the busbar 30, and the block 20 is housed in the block housing portion 15 of the frame 11, as shown in Figure 4, the electric wire 41 extends downward from the right side of the crimping portion 46 of the terminal fitting 42 (towards the bottom inner surface 13a of the lower cover 13) and curves to the right toward the electric wire insertion hole 16 of the housing 10. Here, as described above, the bolt 51 and nut 27 are used not only as fasteners to electrically connect the terminal fitting 42 and the busbar 30, but also as rescue terminals 70 to which the clip 61 of the booster cable 60 can be connected. Therefore, compared to, for example, the case where a dedicated terminal section for connecting the clip 61 of the booster cable 60 is provided on a part of the busbar 30 and positioned above the contact section 45 of the terminal fitting 42, the crimping section 46 of the terminal fitting 42 can be positioned higher (away from the bottom inner surface 13a), which increases the vertical distance between the crimping section 46 and the bottom inner surface 13a. Thus, the electric wire 41 extending from the crimping section 46 can be directed towards the electric wire insertion hole 16 without bending the electric wire 41 with an excessively small radius of curvature, or, even if the electric wire 41 does come into contact with the bottom inner surface 13a, without the electric wire 41 being pressed against the bottom inner surface 13a with excessive force.

[0028] When using the rescue terminal 70, with the upper cover 12 of the electrical connection box 1 removed and the rescue terminal 70 exposed to the outside, the rescue terminal 70 is clamped by a pair of clips 61 of the booster cable 60 connected to another external power source, as shown in Figures 6 and 7, such that one clip 61 contacts a part of the rescue terminal 70 (i.e., a part selected from the bolt 51, nut 27, contact part 45 and washer 52), and the other clip 61 contacts another part of the rescue terminal 70 (i.e., another part selected from the bolt 51, nut 27, contact part 45 and washer 52). As a result, the pair of clips 61 are electrically connected to the rescue terminal 70, and current flows in the order of clip 61, rescue terminal 70, terminal fitting 42, and electric wire 41, allowing power to be supplied to the electric vehicle's battery from another external power source (for example, charging).

[0029] <Effects and Actions> As described above, according to the electrical connection box 1 of this embodiment, the wire 41 of the terminal-equipped wire 40 extends downward from the terminal fitting 42 toward the bottom inner surface 13a of the lower cover 13 of the housing 10, and curves toward the wire insertion hole 16 of the housing 10. On the other hand, because there is a limit to the amount of space inside the housing 10, it is difficult to place the terminal fitting 42 at a position far away from the bottom inner surface 13a (a position above). Here, the terminal fitting 42 of the terminal-equipped wire 40 has a contact portion 45 that is electrically connected to the busbar 30, and a crimping portion 46 that is crimped onto the core wire 43 of the wire 41. The crimping portion 46 is located closer to the bottom inner surface 13a (downward) than the contact portion 45. Furthermore, the bolt 51 and nut 27 that fasten the contact portion 45 and the busbar 30 together are exposed in their axial direction (left-right direction) without being obstructed by the block 20, and function as a rescue terminal 70 to which the clip 61 of the booster cable 60 can be connected. That is, the bolt 51 and nut 27 can be used not only as fasteners to electrically connect the terminal fitting 42 and the busbar 30, but also as a rescue terminal 70 to which the clip 61 of the booster cable 60 can be connected. Therefore, for example, compared to the case where a dedicated rescue terminal for connecting the clip 61 of the booster cable 60 is provided on the busbar 30 and placed around (above) the terminal fitting 42, the terminal fitting 42 can be moved further away from the bottom inner surface 13a (placed above). And by the amount that the terminal fitting 42 is moved away from the bottom inner surface 13a, the distance between the crimping portion 46 of the terminal fitting 42 and the bottom inner surface 13a increases. Therefore, the electric wire 41 extending from the crimping portion 46 can be directed towards the electric wire insertion hole 16 without having to bend it with an excessively small radius of curvature. Consequently, in the electrical connection box 1 according to this embodiment, the workability of the process of housing the electric wire 41 of the terminal-equipped electric wire 40 inside the electrical connection box 1 can be improved.

[0030] Furthermore, the bolt 51 and nut 27 function as rescue terminals 70 to which the clips 61 of the booster cable 60 can be connected. Therefore, by connecting the clips 61 of the booster cable 60, which is connected to another external power source, to the rescue terminals 70, current flows in the order of clips 61, rescue terminals 70, terminal fittings 42, and wires 41, allowing power to be supplied to a battery or the like (for example, for charging).

[0031] Furthermore, the flange portion 29 of the nut 27 is sandwiched between the block 20 and the busbar 30, thereby holding the nut 27 in place. Therefore, when fastening the bolt 51 to the fastening hole of the nut 27 (i.e., electrically connecting the terminal fitting 42 to the busbar 30), there is no need to hold the nut 27 in place by the worker's hand, thus improving the work efficiency. Moreover, since the cylindrical portion 28 of the nut 27 is exposed in the axial direction, the nut 27 can also be used as the rescue terminal 70 described above.

[0032] <Other forms> It should be noted that the present invention is not limited to the embodiments described above, and various modifications can be adopted within the scope of the present invention. For example, the present invention is not limited to the embodiments described above, and can be modified, improved, etc. as appropriate. Furthermore, the material, shape, dimensions, number, placement, etc. of each component in the embodiments described above are arbitrary and not limited as long as they can achieve the present invention.

[0033] Herein, the features of the embodiments of the electrical junction box 1 according to the present invention described above are briefly listed below in [1] to [3].

[0034] [1] An electrical junction box (1) comprises a wire with terminals (40), a busbar (30) to which the terminal fitting (42) of the wire with terminals (40) is electrically connected, a case (10) having a housing (20) inside which the busbar (30) is held and an insertion hole (16) for inserting the wire (41) of the wire with terminals (40) to the outside, and a bolt (51) and nut (27) for fastening the terminal fitting (42) and the busbar (30) together to electrically connect them, The wire (41) of the wire (40) with terminals is Inside the case (10), the terminal fitting (42) electrically connected to the busbar (30) extends toward the inner wall surface (13a) of the case (10) and curves toward the insertion hole (16) of the case (10), The terminal fitting (42) of the aforementioned wire with terminal (40) is The device has a contact portion (45) which is electrically connected to the busbar (30) by fastening together with the bolt (51) and the nut (27), and a crimping portion (46) which is crimped onto the core wire (43) of the electric wire (41), and the crimping portion (46) is positioned closer to the inner wall surface (13a) than the contact portion (45), The bolt (51) and the nut (27) are The bolt (51) and the nut (27) are exposed in the axial direction without being obstructed by the housing (20) and function as a terminal portion (70) to which an external terminal (61) can be connected. Electrical junction box (1).

[0035] In the electrical junction box configuration described in [1] above, the wire of the terminal-equipped wire extends from the terminal fitting toward the inner wall surface of the case (for example, toward the inner wall surface of the lower cover, i.e., downward) and curves toward the insertion hole in the case. On the other hand, because the amount of space inside the case is limited, it is difficult to place the terminal fitting at a position far away from the inner wall surface without restriction (for example, at an upper position). Here, the terminal fitting of the terminal-equipped wire has a contact portion that is electrically connected to the busbar and a crimping portion that is crimped onto the core wire of the wire. The crimping portion is located closer to the inner wall surface than the contact portion (for example, downward). Furthermore, the bolt and nut that fasten the contact portion and the busbar together are exposed in their axial direction without being obstructed by the housing and function as a terminal portion to which an external terminal can be connected. That is, the bolt and nut can be used not only as fasteners to electrically connect the terminal fitting and the busbar, but also as a terminal portion to which an external terminal can be connected. Therefore, compared to, for example, a case where a dedicated terminal section for connecting external terminals is provided on the busbar and positioned around the terminal fitting (for example, above), the terminal fitting can be positioned further away from the inner wall surface (for example, above). As a result, the distance between the crimping portion of the terminal fitting and the inner wall surface increases by the amount the terminal fitting is further away from the inner wall surface. Therefore, the wires extending from the crimping portion can be directed towards the insertion hole without having to bend them with an excessively small radius of curvature. Consequently, with this configuration of electrical junction box, the workability of the process of housing the wires of terminal-equipped wires inside the electrical junction box can be improved.

[0036] [2] In the electrical junction box (1) described in [1] above, The aforementioned terminal portion is The aforementioned external terminal is a rescue terminal (70) to which a booster clip (61) can be connected. Electrical junction box (1).

[0037] According to the electrical junction box configuration described in [2] above, the bolts and nuts function as rescue terminals to which booster clips can be connected. When a wire with a terminal is connected to a battery or the like, connecting a booster clip that is connected to another external power source to the rescue terminal allows current to flow in the order of booster clip, rescue terminal, terminal fitting, and wire, enabling power to be supplied (for example, charged) from the other external power source to the battery or the like.

[0038] [3] In the electrical junction box (1) described in [1] above, The aforementioned nut (27) is It has a cylindrical portion (28) having a fastening hole for receiving the bolt (51), and a flange portion (29) extending from the cylindrical portion (28) in a direction intersecting the axial direction, The housing (20) is In the axial direction, the flange portion (29) is held between the busbar (30) and the cylindrical portion (28) is exposed in the axial direction. Electrical junction box (1).

[0039] In the electrical junction box configuration described in [3] above, the nut is held in place by the flange portion of the nut being sandwiched between the housing and the busbar. Therefore, when fastening a bolt to the fastening hole of the nut (i.e., electrically connecting the terminal fitting to the busbar), it is not necessary to hold the nut in place by the worker's hand, thus improving the work efficiency. Furthermore, since the cylindrical portion of the nut is exposed in the axial direction, the nut can also be used as the terminal portion as described above. [Explanation of symbols]

[0040] 1. Electrical junction box 10 enclosures (cases) 13a Bottom inner surface (inner wall surface) 16. Wire insertion hole (insertion hole) 20 blocks (housing) 27 nuts 28 Cylindrical part 29 Flange section 30 Busba 40 wires with terminals 41 Electric wire 42 Terminal fittings 43 core wires 45 Contact point 46 Fastening section 51 volts 61 Clips (Booster Clips) 70 Terminal section, relief terminal

Claims

1. An electrical junction box comprising: a wire with terminals; a busbar to which the terminal fittings of the wire with terminals are electrically connected; a case having a housing inside for holding the busbar and an insertion hole for inserting the wire of the wire with terminals to the outside; and bolts and nuts for fastening the terminal fittings and the busbar together to electrically connect them, The wire of the aforementioned wire with terminals is Inside the case, extending from the terminal fitting electrically connected to the busbar, toward the inner wall surface of the case, and curving toward the insertion hole of the case, The terminal fittings of the aforementioned wire with terminals are The system includes a contact portion that is electrically connected to the busbar by fastening together with the bolt and nut, and a crimping portion that is crimped onto the core of the electric wire, wherein the crimping portion is positioned closer to the inner wall surface than the contact portion, The bolt and the nut are The bolt and nut are exposed in the axial direction without being obstructed by the housing and function as terminals to which external terminals can be connected. Electrical junction box.

2. In the electrical junction box according to claim 1, The aforementioned terminal portion is This is a rescue terminal to which a booster clip can be connected as an external terminal. Electrical junction box.

3. In the electrical junction box according to claim 1, The aforementioned nut is It has a cylindrical portion having a fastening hole for receiving the bolt, and a flange portion extending from the cylindrical portion in a direction intersecting the axial direction, The aforementioned housing is In the axial direction, the flange portion is held between the busbar and the cylindrical portion, and the cylindrical portion is exposed in the axial direction. Electrical junction box.

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