Electrical connection box

Abstract

The present application is kept in a stable assembled state. The electric connection box (A) has a base member (10) having a device housing chamber (12) with an open side, and a side wall member (11) as a member separate from the base member (10) and assembled to the base member (10) in a manner of covering the side of the device housing chamber (12). The base member (10) is provided with a groove portion (35), a fitting recess portion (37), a plate-shaped restriction portion (27), and a hooking portion (24) as a departure restriction portion for restricting the side wall member (11) from departing laterally from the base member (10).

Description

Technical Field

[0001] This disclosure relates to an electrical connection box. Background Technology

[0002] Patent document 1 discloses a technique for installing a blocking element in a blocking element storage section formed in a connecting box body. The blocking element storage section has a space open on the upper surface of the connecting box body, and the blocking element is inserted into the blocking element storage section from above the connecting box body. Existing technical documents Patent documents

[0003] Patent Document 1: Japanese Patent Application Publication No. 2021-002441 Summary of the Invention The problem that the invention aims to solve

[0004] In the above-described structure, the peripheral walls of the blocking element storage section surround the electrical components from the front, back, left, and right. Therefore, when the blocking element is picked up with fingers and installed in the blocking element storage section, there is a concern that the fingers may interfere with the peripheral walls. As a countermeasure, it is considered to shape the sidewalls covering the blocking element storage section in the main body of the connecting box into other components. This allows the installer to store the blocking element in the blocking element storage section without interference from the sidewall components. After storing the blocking element in the blocking element storage section, the blocking element can be protected by assembling the sidewall components to the base components.

[0005] As a structure for holding the sidewall component and the base component in an assembled state, it is considered that an elastic locking piece formed on one of the sidewall component and the base component elastically locks relative to a locking portion formed on the other. However, in the structure in which the elastic locking piece is elastically locked, there is a concern that the sidewall component may displace away from the base component.

[0006] The electrical connection box disclosed herein is made based on the above circumstances, and its purpose is to maintain a stable assembled state. Solution for solving the problem

[0007] The electrical connection box disclosed herein has the following features: The base component has a device storage compartment that opens to the side; and The sidewall component, which is separate from the base component, is assembled to the base component in a manner that seals off the device storage chamber from the side. The base component is provided with a departure restriction part that restricts the side wall component from leaving the base component to the side. The effects of the invention

[0008] According to this disclosure, it is possible to maintain a stable assembly state. Attached Figure Description

[0009] Figure 1 This is a perspective view of the electrical connection box of Embodiment 1 as seen from the upper front. Figure 2 This is a three-dimensional view of the electrical connection box as seen from a slightly upward and rearward angle. Figure 3 This is a three-dimensional view of the base component as seen from the upper front. Figure 4 This is a three-dimensional view of the base component as seen from an oblique, rearward angle. Figure 5 This is a perspective view of the side wall component as seen from the upper front. Figure 6 This is a perspective view of the side wall component as seen from an oblique, rear view. Figure 7 It is a perspective view showing the state of the sidewall component separated into the sidewall body and the busbar. Figure 8 It is a front sectional view showing the fitting state of the front fitting part and the front inserting part. Figure 9 It is a top sectional view showing the fitting state of the groove of the front fitting part and the front insert part. Figure 10 It is a top sectional view showing the fitting state of the fitting recess of the front fitting part and the fitting protrusion of the front insert part. Figure 11 This is a front sectional view showing the state in which the expansion of the sidewall component is restricted by the extension. Figure 12 This is a bottom view of the electrical connection box. Figure 13 This is a top view showing the base component separated from a pair of sidewall components. Detailed Implementation

[0010] [Description of embodiments of this disclosure] First, embodiments of this disclosure will be described. The electrical connection box disclosed herein is configured as follows: (1) The device comprises: a base component having a device storage chamber open on the side; and a sidewall component, which is separate from the base component and is assembled to the base component to block the device storage chamber from the side. A departure restriction portion is provided on the base component to restrict the sidewall component from leaving the base component laterally. According to the structure of this disclosure, the departure restriction portion restricts the sidewall component from leaving the base component, thus enabling the base component and the sidewall component to be maintained in a stable assembled state.

[0011] (2) Preferably, a recessed region is formed on the outer surface of the sidewall member, forming a shape that partially recesses a portion of the outer surface in the width direction, and the departure limiting portion abuts against the recessed region. According to this structure, the departure limiting portion is disposed on the outer surface of the sidewall member in an overlapping manner, but it is possible to suppress the width dimension of the sidewall member from increasing due to the presence of the departure limiting portion.

[0012] (3) Based on (2), preferably, the departure limiting portion is disposed only on the outer side surface of the sidewall member at a position closer to the inside than the outermost outermost region. According to this structure, even if the departure limiting portion is disposed overlappingly on the outer side surface of the sidewall member, the width dimension of the sidewall member will not increase.

[0013] (4) Preferably, the base component has an elastic locking portion that holds the sidewall component in an assembled state by locking it to a locking portion of the sidewall component, and the departure limiting portion is connected to the elastic locking portion. According to this structure, the departure limiting portion restricts the sidewall component from leaving the base component, thus preventing the locking portion from detaching from the elastic locking portion.

[0014] (5) Based on (4), preferably, the departure limiting portion protrudes vertically from the side edge of the elastic locking portion. According to this structure, the departure limiting portion increases the flexural rigidity of the elastic locking portion, thus increasing the reliability of the locking function between the elastic locking portion and the locking portion.

[0015] (6) Preferably, the sidewall component has a busbar storage chamber for receiving busbars, the busbar storage chamber being divided by an outer wall portion constituting the outer side surface of the sidewall component and an inner wall portion located between the outer wall portion and the base component, and the departure restriction portion having a hook portion that hooks onto the inner wall portion from the outside. According to this structure, since the hook portion hooks onto the inner wall portion rather than the outer wall portion, it does not protrude significantly to the outside of the sidewall portion. Therefore, it is possible to avoid the sidewall component becoming large in the width direction.

[0016] (7) Based on (6), preferably, the departure limiting part is positioned to restrict the busbar from detaching from the busbar receiving chamber. According to this structure, since the departure limiting part also functions to restrict the detachment of the busbar, the shape of the base component can be simplified compared to the case where a dedicated part is formed for restricting the detachment of the busbar.

[0017] (8) Based on (6) or (7), preferably, the sidewall component has a busbar mounting port that connects the busbar receiving chamber to the outside, and the exit restriction portion only covers a portion of the busbar mounting port. According to this structure, heat generated by the busbar can be released from the busbar mounting port.

[0018] (9) Based on (6) to (8), preferably, a communication hole is formed in the departure restriction portion to communicate between the busbar housing chamber and the outside of the sidewall component. According to this structure, the heat generated by the busbar can be released to the outside of the sidewall component through the communication hole.

[0019] [Details of the embodiments disclosed herein] [Example 1] Reference Figures 1 to 13 Embodiment 1, which embodies the electrical connection box of this disclosure, will be described. However, the invention is not limited to these examples, but refers to all modifications shown in the claims and encompassing the meaning and scope equivalent to the claims. In this Embodiment 1, regarding the front and rear directions of the electrical connection box A, Figure 1 , Figure 3 , Figure 5 , Figure 7 The lower left of the middle Figure 2 , Figure 4 , Figure 6 The upper left corner of the middle, and Figure 9 , Figure 10 , Figure 12 , Figure 13 The left side is defined as the front. Regarding the up and down directions, [the text will be incomplete]. Figures 1 to 8 , Figure 11 The directions indicated by the center are directly defined as up and down. The left and right directions will be discussed later. Figure 8 , Figure 11 The direction represented by the center is directly defined as left and right.

[0020] <Summary of Electrical Connection Box A> like Figure 1 , Figure 2 As shown, the electrical connection box A of this embodiment 1 includes a base component 10 and a pair of symmetrical side wall components 11, which are separate from the base component 10. The pair of side wall components 11 are assembled relative to the base component 10 in a clamping manner from the left and right. The electrical connection box A has a device storage chamber 12 divided by the base component 10 and the pair of side wall components 11. The device storage chamber 12 is open on the upper surface of the electrical connection box A. Figure 11 As shown, multiple electrical devices 64, such as fuses, are stored in the device storage chamber 12.

[0021] A pair of left and right front fitting portions 13 are formed at the front end of the base component 10, and a pair of left and right rear fitting portions 14 are formed at the rear end of the base component 10. A pair of left and right front insert portions 15 are formed at the front end of the side wall component 11, and a pair of left and right rear insert portions 16 are formed at the rear end of the side wall component 11. The base component 10 and the side wall component 11 are held in an assembled state by the fitting of the front fitting portions 13 with the front insert portions 15 and the fitting of the rear fitting portions 14 with the rear insert portions 16.

[0022] <Base Component 10> The base component 10 includes a retaining component 17 made of synthetic resin, a terminal block 18 made of synthetic resin that is separate from the retaining component 17, and a pair of symmetrical metal plates 19. Figure 3 , Figure 4 As shown, the retaining member 17 is a single device having a main body 20 shaped like a cuboid with its long side facing forward and backward, a front plate 21 extending upward from the front edge of the main body 20, and a rear plate 22 extending upward from the rear edge of the main body 20. The space enclosed by the upper surface of the main body 20, the rear surface of the front plate 21, and the front surface of the rear plate 22 functions as a device storage chamber 12. When the side wall member 11 is not assembled to the base member 10, the device storage chamber 12 is open to the outside of the base member 10 on the upper surface of the base member 10 and on the left and right sides of the base member 10.

[0023] like Figure 3 , Figure 4 , Figures 11-13 As shown, a pair of symmetrically arranged protruding portions 23 are formed at the rear end of the main body 20. The protruding portions 23 protrude outwards in a left-right direction from the lower edge of the outer surface of the main body 20. Figure 3 , Figure 4 , Figure 11 , Figure 13 As shown, a rib-shaped hook portion 24 protruding upwards is formed on the protruding end edge of the extension 23 extending in the front-rear direction. (As shown...) Figure 11 , Figure 13 As shown, a plurality of connecting holes 25 spaced apart in the front-rear direction are formed between the main body portion 20 and the hook portion 24 in the extension portion 23.

[0024] A pair of symmetrical rear-side fitting portions 14 are formed at both ends of the rear plate portion 22. For example... Figure 3 , Figure 4 As shown, the rear fitting portion 14 has a plate-shaped elastic locking portion 26 with the plate thickness direction facing the front-rear direction and a plate-shaped limiting portion 27 with the plate thickness direction facing the left-right direction. A locking hole 28 is formed on the rear surface of the elastic locking portion 26. Figure 13As shown, the side edge of the elastic locking portion 26 is connected to the rear edge of the plate-shaped limiting portion 27 at a right angle. The lower edge of the elastic locking portion 26 and the lower edge of the plate-shaped limiting portion 27 are connected to the lower outer surface of the main body portion 20 via the reinforcing portion 29. The space surrounded by the main body portion 20, the elastic locking portion 26, and the plate-shaped limiting portion 27 functions as a guide groove 30 that opens forward and upward and extends in the vertical direction.

[0025] like Figure 1 , Figure 3 , Figure 8 , Figure 12 As shown, the terminal block 18 is a single device, having a support plate portion 31 that oriented the plate thickness direction in the front-to-back direction and a receiving plate portion 32 that oriented the plate thickness direction in the up-down direction. Figure 12 As shown, bolt holes 33 are formed in the receiving plate portion 32, extending vertically through the receiving plate portion 32. The terminal block 18 is assembled to the retaining member 17 in a state covering the front surface of the front plate portion 21. Figure 3 , Figure 4 , Figure 9 , Figure 10 As shown, a pair of left and right storage spaces 34 are formed between the front plate portion 21 of the retaining member 17 and the support plate portion 31 of the terminal block 18. The upper end of the storage space 34 opens to the front of the base member 10 in a slit shape in the left and right direction.

[0026] A pair of symmetrical front-side fitting portions 13 are formed at both ends of the terminal block 18. For example... Figure 4 , Figure 8 , Figure 9 , Figure 13 As shown, a groove 35 extending in the vertical direction is formed on the rear surface of the front fitting portion 13. The upper end of the groove 35 opens onto the upper surface of the terminal block 18. A tapered guide portion 36 is formed at the upper end of the groove 35. Figure 8 , Figure 10 As shown, a fitting recess 37 is formed on the front fitting portion 13, surrounded by four surfaces: front, back, left, and right. The upper end of the fitting recess 37 communicates with the lower end of the groove portion 35. Figure 8 , Figure 12 As shown, a window 38 is formed at the lower end of the front fitting portion 13, which connects the fitting recess 37 and the lower end surface of the front fitting portion 13 in the vertical direction.

[0027] Plate 19 is a single device formed by bending a slender metal sheet. Plate 19 has plate-shaped power supply sections 39 connected at right angles to each other (see reference). Figure 3 , Figure 4 , Figure 9 , Figure 10 ) and plate mounting part 40 (refer to Figures 1-3 , Figure 8 , Figure 13 The plate-shaped power supply section 39 is a flat plate with its thickness direction facing the front-to-back direction. A power supply connection hole 41 extending through the front-to-back direction is formed in the plate-shaped power supply section 39 (see reference). Figure 8 The plate-shaped mounting portion 40 is a flat plate with its thickness direction pointing vertically, extending forward from the upper edge of the plate-shaped power supply portion 39. (Example) Figure 3 As shown, a mounting hole 68 is formed in the plate-shaped mounting portion 40, which extends through the plate-shaped mounting portion 40 in the vertical direction.

[0028] The plate 19 is assembled to the base member 10 in a state where the plate-shaped power supply unit 39 is housed within the housing space 34 and the plate-shaped mounting portion 40 is exposed outside the housing space 34, placed on the receiving plate portion 32. The edge of the power supply connection hole 41 in the plate-shaped power supply unit 39 is exposed at the cutout formed in the supporting plate portion 31. The power supply terminal (not shown) connected to the battery (not shown) is connected to the plate-shaped power supply unit 39 via the power supply connection hole 41.

[0029] <Side wall component 11> The sidewall component 11 is constructed by assembling a sidewall body 42 made of synthetic resin and a busbar 43 made of metal. For example... Figures 5-7 As shown, the sidewall body 42 is a single device with a top-view shape that is slender in the front-to-back direction and has its wall thickness oriented in the left-to-right direction. For example... Figures 9-12 As shown, the sidewall body 42 has an outer wall portion 44 with its wall thickness direction oriented to the left and right, and an inner wall portion 45 with its wall thickness direction oriented to the left and right. The lower end portion of the front edge of the sidewall body 42 functions as a front insert portion 15. Figures 5-8 As shown, a downwardly protruding fitting protrusion 46 is formed at the lower end of the front insert portion 15. Figure 1 , Figure 5 , Figure 7 , Figure 8 As shown, a step-shaped stop 47 protruding forward and laterally is formed at the upper end of the front insert 15. The lower end portion of the rear edge of the sidewall body 42 functions as the rear insert 16. Figure 2 , Figure 6 As shown, a protruding locking protrusion 48 is formed on the rear end face of the side wall body 42.

[0030] like Figures 9-12 As shown, a manifold storage chamber 49 is formed inside the sidewall body 42, sandwiched between the outer wall portion 44 and the inner wall portion 45. The manifold storage chamber 49 is a narrow space with dimensions smaller in the left-right direction than in the front-back direction and in the top-bottom direction. Figure 11 , Figure 12As shown, a busbar mounting port 50 with a slit-like opening in the front-to-back direction is formed on the lower surface of the side wall body 42. The busbar mounting port 50 is an opening for mounting the busbar 43 into the busbar storage chamber 49.

[0031] Busbar 43 is a single device formed by bending a metal plate that has been punched into a predetermined shape. For example... Figure 7 As shown, the busbar 43 has a flat substrate portion 51 with its thickness direction facing left to right, a flat heat sink portion 52, a plurality of tabs 53, and a flat connecting plate portion 54. In a side view of the busbar 43 viewed from the left to right, the substrate portion 51 and the heat sink portion 52 are rectangular. The heat sink portion 52 extends from the lower edge of the substrate portion 51 in a manner that overlaps with the inner surface of the substrate portion 51. The plurality of tabs 53 are arranged to protrude upward from the upper edge of the substrate portion 51 and are spaced apart in the front-back direction.

[0032] The connecting plate portion 54 protrudes horizontally inward from the upper edge of the support portion 55 at the front end of the base plate portion 51. A through hole 56 is formed in the connecting plate portion 54, extending through the connecting plate portion 54 in the vertical direction. The busbar 43 is assembled to the sidewall body 42 in a state in which the base plate portion 51, the heat sink portion 52, and the protrusion 53 are housed in the busbar housing chamber 49. The connecting plate portion 54 protrudes to the outside of the sidewall body 42 and protrudes inward in the left-right direction, towards the side closer to the base member 10.

[0033] like Figure 1 , Figure 2 , Figure 5 , Figure 12 , Figure 13 As shown, a wide extension 57 is formed at the upper end of the sidewall body 42. Within the extension 57, multiple fuse housings 58, each opening onto the upper surface of the sidewall body 42, are formed in a row along the front-rear direction. The lower ends of the multiple fuse housings 58 communicate with the busbar housing 49. Fuses 59 are installed in the fuse housings 58 from above the sidewall member 11 (see reference). Figure 5 One lead 60 of fuse 59 is connected to the tab 53 of busbar 43. In the lower end region of the widened portion 57, a plurality of cavities 61 opening on the lower surface of the sidewall body 42 are formed in a row along the front-rear direction (see reference). Figure 12 The upper ends of the multiple cavities 61 are respectively connected to the lower ends of the multiple fuse housings 58. Each cavity 61 houses a wire harness terminal 63, which is respectively connected to the multiple wires 62 constituting the wire harness. The wire harness terminal 63 is connected to the lead 60 on the other side of the fuse 59.

[0034] <Assembly sequence of electrical connection box A> When assembling the electrical connection box A, the retaining member 17 is separated from the terminal block 18. In this state, the plate 19 is temporarily held on the terminal block 18 with the plate-shaped mounting part 40 placed on the receiving plate part 32 and the plate-shaped power supply part 39 overlapping the rear surface of the terminal block 18. Next, the terminal block 18 and the plate 19 are assembled by pressing them into the retaining member 17 from below. By assembling the terminal block 18 to the retaining member 17, a storage space 34 is formed, and the plate-shaped power supply part 39 of the plate 19 is stored in the storage space 34, thereby completing the assembly of the base member 10.

[0035] After assembling the base component 10, the electrical device 64 is mounted on the holding component 17 such that it is stored in the device storage chamber 12 from above the base component 10. Since the device storage chamber 12 opens to the left and right sides of the base component 10, if an installer picks up the electrical device 64 from the left or right, their fingers will not interfere with the base component 10. Therefore, the installation of the electrical component is smooth. Even when the electrical device 64 is installed using an automatic machine, if the machine's grippers hold the electrical device 64 from the left and right, the grippers will not interfere with the base component 10.

[0036] Next, a pair of sidewall members 11 are assembled on the base member 10. During assembly, the front insert 15 is inserted from above relative to the front fitting 13, and the rear insert 16 is inserted from above relative to the rear fitting 14. Specifically, the front insert 15 is fitted with the groove 35, and the rear insert 16 is fitted with the guide groove 30. Even if the front insert 15 is misaligned in the left-right direction relative to the front fitting 13, the misalignment can be corrected by the guide 36.

[0037] If the sidewall component 11 reaches a predetermined assembly state relative to the base component 10, the stop 47 abuts against the upper end of the front fitting portion 13, and the rear insert portion 16 abuts against the reinforcing portion 29. Simultaneously, the fitting protrusion 46 engages with the fitting recess 37, and the locking protrusion 48 engages with the locking hole 28. By engaging the front insert portion 15 with the front fitting portion 13, the sidewall component 11 is positioned relative to the base component 10 in both the front-rear and left-right directions. The locking protrusion 48 engaging with the locking hole 28 prevents the sidewall component 11 from disengaging upwards relative to the base component 10.

[0038] If the side wall component 11 is installed on the base component 10, the device storage chamber 12 is covered by the side wall component 11 from both the left and right sides, thus completing the assembly of the electrical connection box A. The device storage chamber 12 is thus completely surrounded from the front-to-back direction and the left-to-right direction.

[0039] With the sidewall component 11 assembled to the base component 10, the connecting plate portion 54 of the busbar 43 overlaps the upper surface of the plate-shaped mounting portion 40 of the plate 19. That is, the assembly direction of the sidewall component 11 relative to the base component 10 is the same as the assembly direction of the connecting plate portion 54 relative to the plate-shaped mounting portion 40. With the connecting plate portion 54 mounted on the plate-shaped mounting portion 40, the bolt 70 passes through the through hole 56, the mounting hole 68, and the bolt hole 33. By screwing the bolt 70 into and tightening the nut 71 provided on the lower surface of the receiving plate portion 32, the plate 19 and the busbar 43 are fixed to the terminal block 18. By fixing the connecting plate portion 54 to the receiving plate portion 32, the front end of the sidewall component 11 is fixed to the front end of the base component 10.

[0040] <Function and Effect of the Examples> The electrical connection box A of this embodiment includes a base component 10 having a device storage chamber 12 with open sides, and a side wall component 11 that is separate from the base component 10. The side wall component 11 is assembled to the base component 10 to seal the device storage chamber 12 from the side. A front insert portion 15 and a rear insert portion 16 are formed on the side wall component 11. A front fitting portion 13 and a rear fitting portion 14 are formed on the base component 10. During the assembly of the side wall component 11 to the base component 10, the front fitting portion 13 and the front insert portion 15 slide and engage simultaneously, and the rear fitting portion 14 and the rear insert portion 16 slide and engage simultaneously. Since the side wall component 11 is slidably engaged with the base component 10 while being engaged with it, the side wall component 11 and the base component 10 can be maintained in a stable assembled state.

[0041] The base member 10 has a guide portion 36 that guides the front insert portion 15 into the groove 35 of the front fitting portion 13, thus providing excellent installability when the side wall member 11 is assembled to the base member 10. The front fitting portion 13 has a groove 35 that allows the front insert portion 15 to slide when it is housed. The front fitting portion 13 has a window 38 that communicates with the lower outer side of the groove 35 via a fitting recess 37. The window 38 is located at the inner end of the front insert portion 15 in the groove 35 in the fitting direction, that is, at the lower end of the front fitting portion 13. According to this structure, by observing the window 38 from below the front fitting portion 13, the fitting state of the front insert portion 15 in the groove 35, that is, whether the fitting protrusion 46 of the front insert portion 15 reaches the fitting recess 37 at the inner end of the groove 35, can be visually confirmed.

[0042] The base component 10 has a plate 19 with a plate-shaped mounting portion 40. The sidewall component 11 has a busbar 43 with a connecting plate portion 54. The connecting plate portion 54 overlaps with the plate-shaped mounting portion 40 in the same direction as the assembly direction of the sidewall component 11 relative to the base component 10. According to this structure, by assembling the sidewall component 11 to the base component 10, the plate-shaped mounting portion 40 and the connecting plate portion 54 can be connected. The connecting plate portion 54 is arranged close to the front insert portion 15 in the left-right direction. According to this structure, by engaging the front insert portion 15 with the front fitting portion 13, the connecting plate portion 54 can be positioned with high precision relative to the plate-shaped mounting portion 40.

[0043] The front fitting portion 13 and the plate-shaped mounting portion 40 of the plate 19 are disposed at the front end of the base member 10. The connecting plate portion 54 of the plate-shaped mounting portion 40 and the busbar 43 are fixed by bolts 70 and nuts 71 as fastening members. The elastic locking portion 26 formed at the rear end of the base member 10 holds the side wall member 11 in an assembled state by elastically locking relative to the side wall member 11. According to this structure, the side wall member 11 is held by the base member 10 at two locations at both the front and rear ends, so the assembled state of the base member 10 and the side wall member 11 is stable. The tightening operation of the bolts 70 and nuts 71 can be performed only at the front end of the base member 10, so the installation performance is better compared to the case where the fastening members are tightened at both the front and rear ends.

[0044] A front fitting portion 13 having a groove 35 and a fitting recess 37 is formed at the front end of the base member 10. The groove 35 and the fitting recess 37 function as a departure restriction portion to prevent the side wall member 11 from moving laterally from the base member 10 by engaging the front fitting portion 15 with the fitting protrusion 46. A rear fitting portion 14 having a plate-shaped restriction portion 27 is formed at the rear end of the base member 10. The plate-shaped restriction portion 27 functions as a departure restriction portion to prevent the side wall member 11 from moving laterally from the base member 10. The plate-shaped restriction portion 27 functions as a departure restriction portion by abutting the rear fitting portion 16. An extension portion 23 having a hook portion 24 is formed at the lower end of the base member 10. The hook portion 24 functions as a departure restriction portion to prevent the side wall member 11 from moving laterally from the base member 10. The hook portion 24 functions as a departure restriction portion by engaging with the inner wall portion 45 of the side wall component 11. Since the departure restriction portion restricts the side wall component 11 from leaving the base component 10, the base component 10 and the side wall component 11 can be kept in a stable assembled state.

[0045] like Figure 1 , Figure 2 , Figure 5 , Figure 11As shown, a recessed region 66 is formed on the outer surface of the sidewall member 11, forming a shape that partially recesses a portion of the outer surface in the width direction. The recessed region 66 is a region in the side surface of the sidewall member 11 that is lower than the widened portion 57. The recessed region 66 includes a front insert portion 15 and a rear insert portion 16. The front fitting portion 13 and the rear fitting portion 14, which are exiting the limiting portion, abut against the recessed region 66. The front fitting portion 13 and the rear fitting portion 14 are arranged overlappingly on the outer surface of the sidewall member 11, but according to the above structure, it is possible to prevent the width dimension of the sidewall member 11 from increasing due to the presence of the front fitting portion 13 and the rear fitting portion 14.

[0046] The area on the outer surface of the sidewall member 11 where the widened portion 57 is formed is defined as the outermost region 67 located on the outermost side of the outer surface of the sidewall member 11 in the left-right direction. The front fitting portion 13 and the rear fitting portion 14 are only disposed in the left-right direction at positions closer to the inner side than the outermost region 67. According to this structure, even if the front fitting portion 13 and the rear fitting portion 14 are disposed on the outer surface of the sidewall member 11 in an overlapping manner, the width dimension of the sidewall member 11 will not increase.

[0047] The base component 10 has an elastic locking portion 26, which holds the sidewall component 11 in an assembled state by locking it against a locking protrusion 48 on the sidewall component 11. A plate-shaped limiting portion 27 is connected to the side edge of the elastic locking portion 26. Since the plate-shaped limiting portion 27 restricts the sidewall component 11 from leaving the base component 10, it is possible to prevent the locking protrusion 48 from disengaging from the elastic locking portion 26. The plate-shaped limiting portion 27 protrudes vertically from the side edge of the elastic locking portion 26, thus increasing the flexural rigidity of the elastic locking portion 26. As a result, the reliability of the locking function of the elastic locking portion 26 and the locking protrusion 48 is improved.

[0048] The sidewall component 11 has a busbar storage chamber 49 for accommodating the busbar 43. The busbar storage chamber 49 is divided by an outer wall portion 44 forming the outer surface of the sidewall component 11 and an inner wall portion 45 located between the outer wall portion 44 and the base component 10. The extension portion 23 has a hook portion 24 that hooks onto the inner wall portion 45 from the outside. Since the hook portion 24 hooks onto the inner wall portion 45 and not onto the outer wall portion 44, it does not protrude significantly to the outside of the sidewall portion. Therefore, it is possible to avoid the sidewall component 11 becoming too large in the width direction.

[0049] The extension 23 is positioned to prevent the busbar 43 from detaching from the busbar storage chamber 49. In addition to preventing the sidewall member 11 from separating from the base member 10, the extension 23 also serves to prevent the busbar 43 from detaching. Compared to a case where a dedicated portion for preventing the busbar 43 from detaching is formed independently of the extension 23, the shape of the base member 10 can be simplified.

[0050] The sidewall component 11 has a busbar mounting port 50 that communicates the busbar housing 49 with the outside. The extension 23 is configured to cover only a portion of the busbar mounting port 50, namely the rear end. According to this configuration, heat generated by the busbar 43 can be effectively released from the busbar mounting port 50. A communication hole 25 is formed in the extension 23 that communicates the inside of the busbar housing 49 with the outside of the sidewall component 11. According to this configuration, heat generated by the busbar 43 can be released to the outside of the sidewall component 11 through the communication hole 25.

[0051] [Other Embodiments] This invention is not limited to the embodiments described above and in the accompanying drawings, but is illustrated by the claims. The invention includes all meanings equivalent to the claims and all modifications thereof, as well as the embodiments described below. In the above embodiment, the departure limiting part protrudes vertically from the side edge of the elastic locking part, but the departure limiting part may also extend from the elastic locking part in the same plane. In the above embodiment, the departure limiting part is connected to the elastic locking part, but the departure limiting part may also be configured in a different part than the elastic locking part. In the above embodiments, the departure restriction part also serves to restrict the detachment of the busbar, but a dedicated part for restricting the detachment of the busbar can also be formed in the base component. In the above embodiments, the exit restriction section only covers a portion of the busbar mounting port, but the exit restriction section may also cover the entire area of ​​the busbar mounting port. In the above embodiments, the extension has a connecting hole, but the extension may also be in a shape without a connecting hole. Explanation of reference numerals in the attached figures

[0052] A… Electrical connection box 10…Base components 11…Side wall components 12… Component Storage Room 13…Front side fitting part 14…Rear fitting part 15…Front Embedded Part 16… Rear Embedded Part 17…Retaining components 18…Terminal block 19…board 20…Main Body 21…Front panel 22…Rear panel 23…Extension 24… Hook section (removal from restriction section) 25…connecting holes 26…Elastic locking part 27…plate-shaped restriction section (exiting the restriction section) 28…stop hole 29…Reinforcement Department 30…Guide groove 31…Support plate section 32…Receiving Board Section 33… Bolt hole 34… Storage space 35… Slot (Leaving the restriction section) 36…Guidance Department 37… Fitting recess (separation from the limiting part) 38… Window openings 39…plate-shaped power supply section 40…plate mounting section 41…Power supply connection hole 42…Side wall main body 43…Busbar 44…Outer wall section 45…Inner wall part 46…fitting protrusion 47…stop 48… Locking protrusion (locking part) 49…Convergence Storage Room 50…busbar installation port 51...Substrate part 52…Heat Discharge Plate Section 53… punctum 54…Connecting plate section 55… Support section 56… Through hole 57…Expansion Section 58… Fuse Storage Room 59…fuse 60…lead wire 61…Cavity 62… wire 63…Wire Harness Terminal 64…Electrical Components 66…recessed area 67…outermost region 68… Mounting holes 70… bolts 71…nut

Claims

1. An electrical connection box, comprising: The base component has a device storage compartment that opens to the side; and The sidewall component, which is separate from the base component, is assembled to the base component in a manner that seals off the device storage chamber from the side. The base component is provided with a departure restriction part that restricts the sidewall component from moving laterally away from the base component. The exit restriction portion protrudes outward from the base component, where the sidewall component is assembled. A recessed region is formed on the outer surface of the sidewall component, forming a shape that partially recesses a portion of the outer surface in the width direction. The exit restriction portion abuts against the recessed area.

2. The electrical connection box according to claim 1, wherein, The exit restriction portion is located only on the outer side of the sidewall component, at a position inside the outermost outermost region.

3. The electrical connection box according to claim 1 or claim 2, wherein, The base component has an elastic locking portion that holds the sidewall component in an assembled state by locking it against the locking portion of the sidewall component. The departure restriction part is connected to the elastic locking part.

4. The electrical connection box according to claim 3, wherein, The departure restriction portion protrudes vertically from the side edge of the elastic locking portion.

5. The electrical connection box according to claim 1 or claim 2, wherein, The sidewall component has a busbar storage chamber for storing busbars. The manifold storage chamber is divided by an outer wall portion constituting the outer side surface of the side wall component and an inner wall portion located between the outer wall portion and the base component. The departure restriction part has a hook part that hooks onto the inner wall from the outside.

6. The electrical connection box according to claim 5, wherein, The departure restriction is positioned to prevent the busbar from detaching from the busbar storage chamber.

7. The electrical connection box according to claim 5, wherein, The sidewall component has a busbar mounting port that connects the busbar storage chamber to the outside. The exit restriction section only covers a portion of the busbar mounting port.

8. The electrical connection box according to claim 5, wherein, A communication hole is formed in the exit restriction section to connect the busbar storage chamber with the outside of the side wall component.

9. An electrical connection box, comprising: The base component has a device storage compartment that opens to the side; and The sidewall component, which is separate from the base component, is assembled to the base component in a manner that seals off the device storage chamber from the side. The base component is provided with a departure restriction part that restricts the sidewall component from moving laterally away from the base component. The sidewall component has a busbar storage chamber for storing busbars. The manifold storage chamber is divided by an outer wall portion constituting the outer side surface of the side wall component and an inner wall portion located between the outer wall portion and the base component. The departure restriction portion has an outwardly projecting portion protruding from the lower end of the base component, and a rib-shaped hook portion provided on the outwardly projecting portion extending in the front-rear direction and hooking onto the inner wall portion from the outside.

10. The electrical connection box according to claim 9, wherein, The departure restriction is positioned to prevent the busbar from detaching from the busbar storage chamber.

11. The electrical connection box according to claim 9, wherein, The sidewall component has a busbar mounting port that connects the busbar storage chamber to the outside. The exit restriction section only covers a portion of the busbar mounting port.

12. The electrical connection box according to claim 9, wherein, A communication hole is formed in the exit restriction section to connect the busbar storage chamber with the outside of the side wall component.

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