Electrical connection box and connection structure between electrical connection box and extension electrical connection box

Abstract

To provide an electric connection box which can easily supply power to an electric connection box for extension, and a connection structure of an electric connection box and an electric connection box for extension.SOLUTION: An electric connection box 1 has a first resin body 2 which has an opening on an upper side in a vertical direction when an electric connection box 1 is installed and has a box shape, and a second resin body 4 which is assembled on the first resin body 2 so as to cover the opening and is removable. The first resin body 2 has a power supply part 121 for supplying power to the electric connection box 81 for extension in the outside of the storage space, and the power supply part 121 is exposed to the outside of the storage space when the second resin body 4 is removed from the first resin body 2.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an electrical connection box and a connection structure between the electrical connection box and an extension electrical connection box.

Background Art

[0002] Conventionally, there have been proposed electrical connection boxes such as relay boxes and fuse boxes that are mounted on vehicles and have an accommodation space for accommodating electronic components such as relays and fuses (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Generally, the circuit configuration of an electrical connection box mounted on a vehicle often varies depending on differences such as the vehicle type and grade of the vehicle on which it is mounted. For example, electronic components that are commonly used in any vehicle are accommodated in the accommodation space of the electrical connection box and mounted on the vehicle. Then, electronic components used only in some vehicles are accommodated in an extension electrical connection box, and the extension electrical connection box is mounted on the vehicle according to the vehicle type, grade, etc. of the vehicle. For example, power is supplied to the electronic components accommodated in the extension electrical connection box from the electrical connection box via an electric wire.

[0005] Since various components are mounted in the vehicle on which the electrical connection box is mounted, the working area for connecting the electrical connection box and the extension electrical connection box is limited. Therefore, if the connection structure between the electrical connection box and the extension electrical connection box is complicated, the workability will be significantly impaired.

[0006] The present invention has been made in view of the above-described situation, and an object thereof is to provide an electrical connection box capable of easily supplying power to an extension electrical connection box and a connection structure between the electrical connection box and the extension electrical connection box.

Means for Solving the Problems

[0007] In order to achieve the above-described object, the electrical connection box and the connection structure between the electrical connection box and the extension electrical connection box according to the present invention are as follows [1] to 3 and are characterized by the following. [1] An electrical connection box having an accommodation space capable of accommodating electronic components, a box-shaped first resin body having an opening on the upper side in the vertical direction when the electrical connection box is installed, and a second resin body assembled to the first resin body so as to cover the opening and be removable, the first resin body has a power supply unit that supplies power to an extension electrical connection box outside the Electrical connection box ; the power supply unit is exposed to the outside when the second resin body is removed from the first resin body, ri , comprises a third resin body detachably assembled to the first resin body, The first resin body is, a part of the peripheral wall defining the accommodation space, which is an assembled part having a groove shape recessed toward the inside of the electrical connection box, and defines a second accommodation space in which the third resin body is accommodated, a part of the groove inner wall of the assembled part defining the second accommodation space is a communication part having a groove shape recessed so as to be away from the second accommodation space, and a communication part is provided in which the inside of the groove of the communication part and the second accommodation space are connected through the opening of the communication part, one end side of the communication part communicates with the accommodation space, and the other end side of the communication part communicates with the outside of the electrical connection box, in a state where the third resin body is accommodated in the second accommodation space, the opening of the communication part is blocked by a part of the outer wall of the third resin body, and it is an electrical connection box. [2] In the electrical connection box according to [1] above, the first resin body of the said communication part is provided with a removable lid, and when the lid is removed from the first resin body, the electrical connection box of the said communication part communicates with the outside through the said communication part when the lid is removed from the first resin body, between the accommodation space of the electrical connection box communicates with the outside. 、 It must be an electrical junction box. [ 3 ] [1] or the above [2] the electrical connection box according to an expansion electrical junction box in which electronic components are housed; One end is connected to the power supply. 、 The other end is connected to the electronic components of the expansion electrical junction box. and a middle part between the one end and the other end is inserted through the communication part and an electric wire. The connection structure must be between the electrical connection box and the expansion electrical connection box.

[0008] The electrical junction box having the configuration [1] above will be described below. The electrical junction box of this configuration includes a box-shaped first resin body having an opening on the vertically upper side when installed (for example, mounted on a vehicle), and a second resin body that is removably attached to the first resin body to cover the opening. The power supply unit that supplies power to the expansion electrical junction box located outside the accommodation space is exposed outside the accommodation space by removing the second resin body from the first resin body. For example, when connecting the expansion electrical junction box to the electrical junction box, power can be supplied from the electrical junction box to the expansion electrical junction box by connecting the power supply unit to the connection unit of the expansion electrical junction box. In this way, the electrical junction box of this configuration can easily supply power to the expansion electrical junction box. Furthermore, the electrical connection box of this configuration further includes a third resin body detachably assembled to the assembled part of the first resin body. The assembled part has a groove shape in which the peripheral wall in a direction intersecting the vertical direction of the first resin body is recessed inward, and a communication part recessed away from the third resin is provided on the groove inner wall. For example, when the extended electrical connection box is powered from the electrical connection box via an electric wire, by removing the lid part and the third resin body from the first resin body, the electric wire can be easily inserted into the communication part. After that, when the third resin body is assembled to the first resin body, the displacement of the electric wire can be restricted by the third resin body.

[0009] The electrical junction box having the configuration [2] above will be described below. In this configuration, the first resin body is provided with a removable lid, and when the lid is removed from the first resin body, a communication section is defined that connects the inside and outside of the storage space. For example, if the expansion electrical junction box receives power from the electrical junction box via an electric wire, the lid can be removed from the first resin body and the electric wire can be inserted through the defined communication section. Furthermore, when the expansion electrical junction box is not connected to the electrical junction box, the lid does not connect the inside and outside of the storage space, preventing water from entering the inside of the storage space from the outside, thereby ensuring the waterproofness of the electrical junction box.

[0011] the above[ 3The connection structure between the electrical connection box and the extension electrical connection box of this configuration will be described below. The connection structure between the electrical connection box and the extension electrical connection box of this configuration is the electrical connection box described in the above [1] or the above [2] an extension electrical connection box in which electronic components are housed, and an electric wire having a power supply unit connected to one end and the electronic components of the extension electrical connection box connected to the other end. That is, by removing the second resin body from the first resin body and conductively connecting one end of the electric wire to the exposed power supply unit, power is supplied to the electronic components housed in the extension electrical connection box and conductively connected to the other end of the electric wire. In this way, in the connection structure between the electrical connection box and the extension electrical connection box of this configuration, the extension electrical connection box can be easily supplied with power from the electrical connection box via the electric wire.

Advantages of the Invention

[0012] As described above, according to the present invention, it is possible to provide an electrical connection box capable of easily supplying power to an extension electrical connection box, and a connection structure between the electrical connection box and the extension electrical connection box.

[0013] The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading through the embodiments for carrying out the invention described below with reference to the accompanying drawings.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

DETAILED DESCRIPTION OF THE INVENTION

[0015] <Embodiment> Hereinafter, with reference to the drawings, the electrical connection box 1 according to the embodiment of the present invention shown in FIG. 1 will be described. The electrical connection box 1 is typically a relay box mounted on a vehicle and having an internal space for accommodating components R (see FIGS. 2 to 3) such as electronic components and other components such as relays.

[0016] Hereinafter, for convenience of explanation, as shown in FIG. 1, “front”, “rear”, “left”, “right”, “up” and “down” are defined. The “front-rear direction”, “left-right direction” and “up-down direction” are orthogonal to each other. When the electrical connection box 1 is mounted on a vehicle, the “front-rear direction”, “left-right direction” and “up-down direction” correspond to the front-rear direction, left-right direction and up-down direction of the vehicle, respectively. Further, the side facing the inside of the electrical connection box 1 is called the “inner” side, and the side facing the outside of the electrical connection box 1 is called the “outer” side.

[0017] As shown in FIGS. 1 and 2, the electrical connection box 1 is composed of a frame 2, a lower cover 3 assembled below the frame 2 so as to close the lower end opening of the frame 2, an upper cover 4 assembled above the frame 2 so as to close the upper end opening of the frame 2, and a side cover 5 assembled to the peripheral wall of the frame 2. All of the above four components constituting the electrical connection box 1 are resin molded bodies.

[0018] In the electrical connection box 1, as shown in FIG. 1, an electric wire (not shown) electrically connected to a part of the component R located inside the electrical connection box 1 is led out to the outside of the electrical connection box 1 through a wire lead-out hole 6 provided in the front side portion of the electrical connection box 1. Further, an electric wire (not shown) electrically connected to another part of the component R is led out to the outside of the electrical connection box 1 through a wire lead-out hole 9 (see FIG. 10) provided in the lower left portion of the electrical connection box 1. In addition, an electric wire (not shown) electrically connected to a bus bar BS assembled to the holding portion 12 inside the electrical connection box 1 is led out to the outside of the electrical connection box through the wire lead-out hole 7. Hereinafter, the frame 2, the lower cover 3, the upper cover 4, and the side cover 5 constituting the electrical connection box 1 will be described in order.

[0019] First, the frame 2 will be described. As shown in FIGS. 1 to 3, the frame 2 includes a substantially rectangular cylindrical side wall portion 11 extending in the vertical direction. The side wall portion 11 constitutes most of the appearance of the side surface of the electrical connection box 1. As shown in FIGS. 2 to 3, a flat plate-shaped holding portion 12 is provided on the side wall portion 11 so as to extend in a direction orthogonal to the vertical direction of the internal space of the side wall portion 11 and divide it into upper and lower parts. A plurality of types of components R are held on the holding portion 12 so as to be arranged along the extending direction of the holding portion 12.

[0020] A split connector 121 is provided at the front and right corner of the holding part 12 (see FIGS. 6 and 7). The split connector 121 is connected to a split connector 83 provided at one end of an electric wire 82 described later to form an integral connector. The split connector 121 has a box-shaped part 122 having a substantially rectangular shape opened at the upper and front sides, and a terminal part 123 positioned inside the box-shaped part 122 (see particularly FIG. 7(a)). Electric power is supplied to the split connector 121 via a bus bar BS assembled to the holding part 12. A locking part 124 is provided on the side wall of the holding part 12 (see FIGS. 6 to 7). The holding part 12 is held by the frame 2 by being locked with a locked part (not shown) provided inside the side wall part 11 by the locking part 124.

[0021] On the front and right side of the side wall part 11, as shown in FIG. 2, an assembled part 13 having a groove shape recessed toward the inside of the electric connection box 1 is provided so as to extend in the vertical direction. As shown in FIGS. 2 and 4, the assembled part 13 has a semi-cylindrical shape. The groove inner wall 15 of the assembled part 13 has a function of constituting the rear side part of the inner wall defining the electric wire outlet hole 6. A communication part 17 recessed toward the right side is provided on the right groove inner wall 15 of the assembled part 13 so as to extend in the vertical direction (see particularly FIG. 4(c)).

[0022] Before the extension electric connection box 81 is connected to the electric connection box 1, a lid part 16 is attached so as to close the lower end opening of the communication part (see FIG. 4(a)). The lid part 16 suppresses water from entering through the lower end opening of the communication part 17. When the extension electric connection box 81 is connected to the electric connection box 1, the lid part 16 is removed from the communication part 17 as described later. When the lid part 16 is removed from the communication part 17, the communication part 17 is communicated in the vertical direction. A pair of locking pieces 14 are provided on the side wall part 11 positioned at the opening end of the assembled part 13. The locking pieces 14 are locked to the locked parts 52 of the side cover 5 described later.

[0023] Locked portions 18 each including a through-hole extending in the up-down direction are integrally formed on the outer surface of the lower end portion of the side wall portion 11 at a plurality of locations (seven locations in this example) in the circumferential direction (see FIGS. 1 to 3). The locked portions 18 function to assemble the lower cover 3 to the frame 2.

[0024] The side wall 11 has an upper end portion, and the outer surface thereof is integrally provided with a plurality of locking portions 19 at various positions (three positions in this example) in the circumferential direction (see FIGS. 1 to 3). The locking portions 19 function to assemble the upper cover 4 to the frame 2.

[0025] Stay portions 21 extending downward are integrally provided on the outer surface of the lower end portion of the side wall portion 11 at a plurality of locations (four locations in this example) in the circumferential direction, respectively (see FIGS. 1 to 3). The stay portions 21 have the function of fixing the frame 2 (i.e., the electrical junction box 1) to a mounting location on the vehicle by assembling their distal ends to the mounting location on the vehicle.

[0026] A semi-cylindrical gutter 23 that opens downward is provided in a portion of the side wall 11 corresponding to the electric wire outlet hole 7 (see FIG. 1) so as to extend obliquely in a lower right direction (see FIG. 2). The gutter 23 functions to form the upper part of the inner wall that defines the electric wire outlet hole 7. Furthermore, a semi-cylindrical gutter 24 that opens downward is provided in a portion of the side wall 11 corresponding to the electric wire outlet hole 9 (see FIG. 10) so as to extend obliquely in a lower right direction (see FIG. 3). The gutter 24 functions to form the upper part of the inner wall that defines the electric wire outlet hole 9.

[0027] Next, a description will be given of the lower cover 3. As shown in Fig. 2, the lower cover 3 integrally comprises an annular side wall portion 31 that forms most of the exterior of the lower side surface of the electrical junction box 1, and a bottom wall portion 32 that closes the annular lower end opening of the side wall portion 31 and forms most of the exterior of the bottom surface of the electrical junction box 1. The annular upper edge portion of the side wall portion 31 has a shape that corresponds to the annular lower edge portion of the side wall portion 11 of the frame 2, and is capable of fitting with the annular lower edge portion of the side wall portion 11.

[0028] The bottom wall portion 32 has a shape that slopes downward from the rear toward the front and also slopes downward from the left toward the right. For this reason, the inner surface (upper surface) of the bottom wall portion 32 also slopes downward from the rear toward the front and slopes downward from the left toward the right. Thus, at the inner surface of the bottom wall portion 32, the right front corner portion is at the lowest position. Since the inner surface of the bottom wall portion 32 slopes in this way, water that has entered the electrical connection box 1 is guided along the inner surface of the bottom wall portion 32 toward the right front corner portion which is at the lowest position.

[0029] At a plurality of locations (seven locations in this example) in the circumferential direction at the upper end portion of the side wall portion 31, locking pieces 33 that extend upward are integrally provided on the outer surfaces respectively corresponding to the plurality of engaged portions 18 of the frame 2 (see FIG. 2).

[0030] At a location corresponding to the wire lead-out hole 6 (see FIG. 1) in the side wall portion 11, a concave portion 34 that is recessed toward the inside of the electrical connection box 1 is provided so as to extend in the vertical direction (see FIG. 2). The concave portion 34 has a function of constituting the rear side portion of the inner wall that defines the wire lead-out hole 6.

[0031] At a location corresponding to the wire lead-out hole 7 (see FIG. 1) in the side wall portion 31, a semi-cylindrical gutter-shaped portion 35 that opens upward is provided so as to extend obliquely in the lower right direction (see FIG. 2). The gutter-shaped portion 35 has a function of constituting the lower side portion of the inner wall that defines the wire lead-out hole 7. Further, at a location corresponding to the wire lead-out hole 9 (see FIG. 10) in the side wall portion 31, a semi-cylindrical gutter-shaped portion 36 that opens upward is provided so as to extend obliquely in the lower left direction (see FIG. 2). The gutter-shaped portion 36 has a function of constituting the lower side portion of the inner wall that defines the wire lead-out hole 9.

[0032] Next, the upper cover 4 will be described. As shown in FIG. 2, the upper cover 4 integrally includes an annular side wall portion 41 that constitutes most of the appearance of the upper side surface of the electrical connection box 1, and an upper wall portion 42 that closes the annular upper end opening of the side wall portion 41 and constitutes most of the appearance of the upper surface of the electrical connection box 1. The annular lower end edge portion of the side wall portion 41 has a shape corresponding to the annular upper end edge portion of the side wall portion 11 of the frame 2 and can be fitted to the annular upper end edge portion of the side wall portion 11.

[0033] At a plurality of locations (in this example, three locations) on the outer surface in the circumferential direction of the side wall portion 41, locking portions 43 are integrally provided corresponding to the plurality of locked portions 19 of the frame 2, respectively.

[0034] Next, the side cover 5 will be described. As shown in FIG. 2, the side cover 5 integrally includes a main body portion 51 having a function of constituting a part of the side wall portion 11 on the front side and the right side of the frame 2, a pair of locked portions 52 provided on the outer surface of the main body portion 51, and a semi-cylindrical portion 53 provided on the inner surface of the main body portion 51. The side cover 5 (semi-cylindrical portion 53) is open inward in communication in the vertical direction. As shown in FIG. 1, the side cover 5 is assembled to the assembled portion 13 of the frame 2.

[0035] The pair of locked portions 52 include through holes extending in the vertical direction and are integrally provided on the main body portion 51 corresponding to the pair of locking pieces 14 of the frame 2. The locked portion 52 has a function of assembling the side cover 5 to the frame 2. The lower side portion of the semi-cylindrical portion 53 has a gutter-like shape protruding downward from the main body portion 51. The semi-cylindrical portion 53 has a function of constituting an outer side portion of the inner wall defining the wire outlet hole 6.

[0036] The frame 2, the lower cover 3, the upper cover 4, and the side cover 5 that constitute the electrical connection box 1 have been described above.

[0037] In order to assemble the electrical junction box 1 which is made up of the frame 2, lower cover 3, upper cover 4, and side cover 5, it is necessary to assemble the lower cover 3, upper cover 4, and side cover 5 to the frame 2.

[0038] To assemble the lower cover 3 to the frame 2, first, the multiple locking pieces 33 (see FIG. 2) of the lower cover 3 are inserted from below into the multiple through-holes of the locked portions 18 (see FIG. 2) of the frame 2, and from this state, the annular upper edge portion of the side wall portion 31 of the lower cover 3 is fitted into the annular lower edge portion of the side wall portion 11 of the frame 2, and the multiple locking pieces 33 are engaged with the multiple locked portions 18. This completes the assembly of the lower cover 3 to the frame 2 (see FIG. 1).

[0039] Similarly, to assemble the upper cover 4 to the frame 2, the annular lower edge of the side wall 41 of the upper cover 4 is fitted into the annular upper edge of the side wall 11 of the frame 2, and the multiple locking portions 43 of the upper cover 4 are locked to the multiple locked portions 19 of the frame 2. This completes the assembly of the upper cover 4 to the frame 2 (see FIG. 1).

[0040] Similarly, to assemble the side cover 5 to the frame 2, the locking pieces 14 of the frame 2 are inserted from below into the through holes of the locked portions 52 of the side cover 5 (see FIG. 2), and the pair of locking pieces 14 are engaged with the pair of locked portions 52. This completes the assembly of the side cover 5 to the frame 2 (see FIG. 1).

[0041] When the electrical junction box 1 is in an assembled state, the engagement between the multiple locking pieces 33 and the multiple locked portions 18 prevents the lower cover 3 from separating downward from the frame 2. Similarly, the engagement between the multiple locking portions 43 and the multiple locked portions 19 prevents the upper cover 4 from separating upward from the frame 2. Similarly, the engagement between the multiple locking pieces 14 and the multiple locked portions 52 prevents the side cover 5 from separating forward from the frame 2. Furthermore, an electric wire outlet hole 6 through which an electric wire (not shown) is inserted is defined (see FIG. 1) by the groove inner wall 15 of the mounted portion 13 of the frame 2 and the semi-cylindrical portion 53 of the side cover 5, and by the semi-cylindrical portion 53 (gutter-shaped portion) of the side cover 5 and the recessed portion 34 of the lower cover 3 (see FIG. 2). Similarly, the gutter-shaped portion 23 of the frame 2 and the gutter-shaped portion 35 of the lower cover 3 (see FIG. 2) define an electric wire drawing hole 7 (see FIG. 1) through which an electric wire (not shown) is inserted.

[0042] The following describes the expansion unit 8 connected to the electric junction box 1. As shown in Fig. 8, the expansion unit 8 includes an expansion electric junction box 81 to which power is supplied from the electric junction box 1, and an electric wire 82 to which a split connector 121 is connected at one end and to which an electronic component (not shown) housed in the expansion electric junction box is connected at the other end.

[0043] The expansion electric junction box 81 is, for example, an electric junction box selected according to the expanded functions of the vehicle. The shape and function of the expansion electric junction box 81 may be selected appropriately according to the vehicle in which it is to be installed. In other words, in the connection structure 100 according to this embodiment, the shape, function, etc. of the expansion electric junction box 81 are not particularly limited, and a conventional electric junction box may be used.

[0044] A split connector 83 is provided at one end of the electric wire 82. The split connector 83 is connected to a split connector 121 provided on the holding portion 12 to form an integrated connector. The split connector 83 has a box-shaped portion 85 having a generally rectangular shape that is open on the top and rear sides, and a terminal portion 84 located inside the box-shaped portion 85 (see FIG. 8 in particular).

[0045] When the extension part (extension electrical connection box 81) is connected to the electrical connection box 1, the other end of the electric wire 82 is conductively connected to the electronic components housed in the extension electrical connection box 81, and the split connector 83 of the electric wire 82 is conductively connected to the split connector 121 of the electrical connection box 1. Thereby, the extension electrical connection box 81 is supplied with power from the electrical connection box 1. Hereinafter, the process of laying the electric wire 82 whose other end is conductively connected to the electronic components housed in the extension electrical connection box 81 in the electrical connection box 1 will be described.

[0046] As shown in FIGS. 3 and 4(a), before the extension electrical connection box 81 is connected to the electrical connection box 1, the side cover 5 is assembled to the assembled part 13 of the frame 2, and the lid part 16 is attached to the lower end opening of the communication part 17.

[0047] When connecting the extension electrical connection box 81 to the electrical connection box 1, first, remove the side cover 5 assembled to the assembled part 13 of the frame 2 (see FIG. 4(b)), apply a force upward or downward to the lid part 16, and remove the lid part 16 from the lower end opening of the communication part 17 (see FIG. 4(c)). Then, insert the electric wire 82 into the communication part 17 communicating in the vertical direction (see FIG. 4(d)). Finally, assemble the side cover 5 to the assembled part 13 of the frame 2. Thereby, the wire drawing hole 6 and the communication part are separated by the side cover 5, and the displacement of the electric wire 82 is restricted by the side cover 5.

[0048] The process of connecting the split connector 121 of the holding part 12 and the split connector 83 provided at one end of the electric wire 82 will be described. First, arrange the split connector 83 of the electric wire 82 above the split connector 121 of the holding part 12 (see FIG. 7(a)). Then, move the split connector 83 of the electric wire 82 downward and connect it to the split connector 121. Thereby, a connector in which the split connector 121 and the split connector 83 are connected is formed.

[0049] Then, the fusible link FL is disposed above the connector composed of the split connector 121 and the split connector 83 (see FIG. 7(b)), and the fusible link FL is moved downward and conductively connected to the connector composed of the split connector 121 and the split connector 83 (see FIG. 6). Specifically, as shown in FIG. 8, the terminal portion 123 of the split connector 121 and the terminal portion 84 of the split connector 83 are respectively inserted into a pair of holes 91 of the fusible link FL. That is, the split connector 121 and the split connector 83 are conductively connected via a fuse.

[0050] Incidentally, when the extension electrical junction box is powered from the electrical junction box via an electric wire, generally, a fusible link for the extension electrical junction box is often pre-accommodated in the accommodation space of the electrical junction box. However, when the extension electrical junction box is not mounted on the vehicle, there is a fusible link for the extension electrical junction box that is not used in the accommodation space of the electrical junction box, and there is room for improvement from the viewpoint of reducing the number of parts and thus reducing the cost.

[0051] However, in the connection structure 100 according to the present embodiment, since it is not necessary to pre-accommodate the fusible link FL in the electrical junction box 1, the number of parts is reduced compared to the conventional electrical junction box, and thus the cost is reduced.

[0052] In the above description, for convenience of explanation, the process of routing the electric wire 82, the other end of which is conductively connected to the electronic component housed in the extension electrical junction box 81, to the electrical junction box 1, and the process of connecting the split connector 121 of the holding portion 12 and the split connector 83 provided at one end of the electric wire 82 are described as separate processes. However, the above two processes may be integrated into one process.

[0053] <Function and Effect> As described above, when the upper cover 4 of the electrical junction box 1 according to this embodiment is removed from the frame 2, the split connector 121 is exposed to the outside (see FIG. 3). By connecting the split connector 83 of the electric wire 82 to the exposed split connector 121, it is possible to supply power from the electrical junction box 1 to the expansion electrical junction box 81. In this way, the electrical junction box 1 according to this embodiment can easily supply power to the expansion electrical junction box 81.

[0054] Furthermore, in the electrical junction box 1 according to this embodiment, the cover 16 is provided on the frame 2 (the lower end opening of the communication portion 17), and the cover 16 prevents water from entering the interior of the storage space when the expansion electrical junction box 8 is not connected to the electrical junction box 1. In this way, the electrical junction box 1 is ensured to be waterproof. When power is supplied from the electrical junction box 1 to the expansion electrical junction box 8, the cover 16 is removed from the frame 2, and the communication portion 17 communicates in the vertical direction so that the electrical wires 82 of the extension portion 8 can be inserted therethrough. This makes it easy to route the electrical wires 82 in the electrical junction box 1 according to this embodiment.

[0055] Furthermore, in the electrical junction box 1 according to this embodiment, when power is supplied from the electrical junction box 1 to the extension electrical junction box 8, the side cover 5 and the lid portion 16 can be removed from the frame 2, allowing the electrical wires 82 of the extension portion 8 to be easily inserted into the communication portion 17. Thereafter, by assembling the side cover 5 to the mounting portion 13 of the frame 2, the displacement of the electrical wires 82 is restricted by the side cover 5.

[0056] In the connection structure 100 between the electric junction box 1 and the expansion electric junction box 81 according to this embodiment, power is supplied to an electronic component housed in the expansion electric junction box 81 and electrically connected to the other end of the electric wire by removing the upper cover 4 from the frame 2 and electrically connecting the split connector 83 provided at one end of the electric wire 82 of the expansion section 8 to the exposed split connector 121. In this way, the connection structure 100 between the electric junction box 1 and the expansion electric junction box 81 according to this embodiment allows the expansion electric junction box 81 to easily supply power from the electric junction box 1 via the electric wire 82.

[0057] <Other forms> The present invention is not limited to the above-described embodiments, and can be appropriately modified, improved, etc. Furthermore, the material, shape, size, number, location, etc. of each component in the above-described embodiments are arbitrary and not limited as long as they can achieve the present invention.

[0058] A connection structure between an electric junction box and an extension electric junction box according to another embodiment will be described with reference to FIGS.

[0059] In the above embodiment, the electric wire 82 of the extension part 8 is provided with a split connector 83, whereas in other embodiments, the electric wire 82 of the extension part 8a is provided with a connector 83a.

[0060] Furthermore, in the above embodiment, the split connector 83 is connected to the split connector 121 of the holding portion 12, and a fusible link FL is attached to the connector consisting of the split connector 121 and the split connector 83.

[0061] On the other hand, in another embodiment, the connector 83a is connected to a connector 121a provided in the internal space (space that accommodates the component R) of the electrical junction box 1 (see particularly FIG. 10(b)). When the connector 83a of the extension portion 8a is connected to the connector 121a, a fusible link FL is accommodated in the electrical junction box 1. The connector 121a and the fusible link FL are electrically connected via an electric wire W. The electric wire W is routed in the space below the holding portion 12. In this way, the connector 121a of the electrical junction box 1, the connector 83a of the extension portion 8a, and the fusible link FL are electrically connected.

[0062] Other than the above-mentioned points, the above embodiment and other embodiments are configured in the same manner. The above is a description of another embodiment.

[0063] Here, the features of the embodiments of the electrical junction box according to the present invention and the connection structure between the electrical junction box and the extension electrical junction box will be briefly summarized and listed below in [1] to [4]. [1] An electrical connection box (1) having a storage space capable of storing electronic components, a box-shaped first resin body (frame 2) having an opening on the upper side in the vertical direction when the electrical connection box (1) is installed; a second resin body (upper cover 4) that is removably attached to the first resin body (frame 2) to cover the opening, The first resin body (frame 2) has a power supply unit (split connector 121, connector 121a) that supplies power to an expansion electrical junction box (81) located outside the accommodation space, The power supply unit (split connector 121, connector 121a) is When the second resin body (upper cover 4) is removed from the first resin body (frame 2), the second resin body (upper cover 4) is exposed to the outside. Electrical junction box (1). [2] In the electrical connection box (1) described in [1] above, The first resin body (frame 2) is provided with a removable lid portion (16), The electrical junction box (1) is When the cover portion (16) is removed from the first resin body (frame 2), a communication portion (17) is defined that connects the inside of the storage space with the outside. Electrical junction box (1). [3] In the electrical connection box (1) described in [2] above, a third resin body (side cover 5) that is detachably assembled to the first resin body (frame 2); The first resin body (frame 2) is a peripheral wall (side wall portion 11) in a direction intersecting the vertical direction has a groove shape recessed inward, and has an assembly receiving portion (13) to which the third resin body (side cover 5) is assembled; A communication portion (17) recessed so as to be spaced apart from the third resin body (side cover 5) is provided on the groove inner wall (15) of the mounting portion (13). Electrical junction box (1). [4] The electrical connection box (1) according to any one of the above [1] to [3], an expansion electrical junction box (81) in which electronic components are housed; and an electric wire (82) having one end connected to the power supply unit (split connector 121) and the other end connected to the electronic components of the expansion electric junction box (81). A connection structure (100) between an electric junction box (1) and an expansion electric junction box (81). [Explanation of symbols]

[0064] 1 Electrical junction box 2 Frame (first resin body) 3 Lower cover 4 Upper cover (second resin body) 5 Side covers 6,7,9 Wire extraction hole 8,8a Extension 11, 31, 41 Side wall 12 Holding part 13 Assembled part 14,33 Locking piece 15 Groove inner wall 16 Lid 17 Communication part 18,19,52 Locked part 21 Stay part 23,24,35,36 Gutter-like part 32 Bottom wall 34 Concave part 42 Upper wall 43 Locking part 51 Main body 53 Semi-cylindrical section 81 Expansion electrical junction box 82,W electric wire 83 Split Connector 83a Connector 84,123 Terminal section 85,122 Box-shaped part 91 Hole 100 Connection structure 121 Split connector (power supply section) 121a Connector (power supply) 124 Locking part BS bus bar FL Fusible Link R parts

Claims

1. An electrical connection box having an accommodation space capable of accommodating electronic components, a box-shaped first resin body having an opening on the upper side in the vertical direction when the electrical connection box is installed, and a second resin body assembled to the first resin body so as to cover the opening and be removable, wherein the first resin body has a power supply unit that supplies power to an extended electrical connection box outside the electrical connection box, the power supply unit, when the second resin body is removed from the first resin body, will be exposed to the outside, comprises a third resin body detachably assembled to the first resin body, the first resin body, a part of the peripheral wall defining the accommodation space is an assembled part having a groove shape recessed toward the inside of the electrical connection box, and the assembled part defines a second accommodation space in which the third resin body is accommodated, a part of the groove inner wall of the assembled part defining the second accommodation space is a communication part having a groove shape recessed away from the second accommodation space, and a communication part in which the inside of the groove of the communication part and the second accommodation space are connected through the opening of the communication part is provided, one end side of the communication part communicates with the accommodation space, and the other end side of the communication part communicates with the outside of the electrical connection box, in a state where the third resin body is accommodated in the second accommodation space, the opening of the communication part is blocked by a part of the outer wall of the third resin body, electrical connection box.

2. In the electrical connection box according to Claim 1, a removable lid is provided at the communication part of the first resin body, the electrical connection box, when the lid is removed from the communication part of the first resin body, the accommodation space and the outside of the electrical connection box communicate with each other through the communication part, electrical connection box.

3. The electrical connection box according to Claim 1 or Claim 2, an extended electrical connection box in which electronic components are accommodated, a wire having the power supply unit connected to one end, the electronic components of the extended electrical connection box connected to the other end, and a middle portion between the one end and the other end inserted through the communication part, a connection structure between the electrical connection box and the extended electrical connection box.

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