Electrical junction box

Abstract

To provide an electric connection box capable of suppressing exposure of a metal component even when an external force is applied to the electric connection box.SOLUTION: An electric connection box 1 includes a case 10 having a cylindrical peripheral wall 11, and a holder 40 to which an electronic component 41 can be attached and which is housed inside the case 10. Holder 40 includes metal component 42 to which electronic component 41 is to be connected, and is disposed adjacent to peripheral wall 11 of case 10. The case 10 is configured so that the strength of a first peripheral wall part, which is at least a part of the peripheral wall 11 adjacent to the holder 40, is smaller than the strength of a second peripheral wall part, which is the peripheral wall 11 at a position different from the first peripheral wall part.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to an electrical junction box including a case having a cylindrical peripheral wall and a holder capable of holding an electronic component and disposed inside the case. [Background technology]

[0002] Conventionally, there have been proposed electrical junction boxes capable of accommodating various electronic components such as relays, fuses, fusible links, etc. Examples of this type of electrical junction box include relay boxes mounted on vehicles such as automobiles (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-182314 Summary of the Invention [Problem to be solved by the invention]

[0004] When an electrical junction box is mounted on a vehicle, if a large external force is applied to the electrical junction box, for example, during a collision, the electrical junction box may be deformed, and metal components such as bus bars built into the electrical junction box may become exposed to the outside of the electrical junction box. Such exposure of metal components is undesirable because it can cause unintended conduction or discharge between the exposed metal components and the metal frame of the vehicle.

[0005] An object of the present invention is to provide an electrical junction box that can prevent metal components from being exposed even when an external force is applied to the electrical junction box. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the electrical junction box according to the present invention has the following features.

[0007] An electrical connection box comprising: a case having a cylindrical peripheral wall; and a holder capable of holding an electronic component and disposed inside the case, The holder is a metal part to which the electronic part is to be connected, the metal part being disposed adjacent to the peripheral wall of the case; The case is The strength of a first peripheral wall portion, which is at least a part of the peripheral wall adjacent to the holder, is smaller than the strength of a second peripheral wall portion, which is the peripheral wall at a position different from the first peripheral wall portion. It must be an electrical junction box. [Effects of the Invention]

[0008] According to the electrical junction box of the present invention, a holder disposed inside the case of the electrical junction box has metal parts (e.g., bus bars, nuts and bolts for fastening external terminals, etc.). The holder is disposed adjacent to the peripheral wall of the case. The case is configured so that the strength of a first peripheral wall portion, which is at least a part of the peripheral wall to which the holder is adjacent, is lower than the strength of a second peripheral wall portion, which is a peripheral wall located at a different position from the first peripheral wall portion. As a result, when a large external force is applied to the electrical junction box and the holder is pressed against the inner surface of the peripheral wall of the case, the first peripheral wall portion sacrificially deforms, thereby reducing the external force acting on the holder. For example, the first peripheral wall portion is broken, and the holder is ejected to the outside of the case. As a result, exposure of metal parts from the holder is suppressed. Therefore, the electrical junction box of the present invention can suppress exposure of metal parts even when an external force is applied to the electrical junction box.

[0009] In addition, from the viewpoint of facilitating the ejection of the holder described above, it is preferable that the first peripheral wall portion of the case be located in a position that will leave as much space as possible between the electrical connection box and other surrounding components when the electrical connection box is mounted on a vehicle, etc.

[0010] The present invention has been briefly described above. The details of the present invention will become more apparent from the detailed description of the invention set forth below, taken in conjunction with the accompanying drawings. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is an exploded perspective view of an electrical junction box according to an embodiment of the present invention. [Figure 2] FIG. 2 is an exploded perspective view of the fusible link holder shown in FIG. [Figure 3] FIG. 3 is a side view of the fusible link holder shown in FIG. [Figure 4] FIG. 4 is an enlarged view of part A in FIG. [Figure 5] FIG. 5 is a top view of the area shown in FIG. [Figure 6] Figure 6 is a top view illustrating how, when an external force acts on the electrical connection box from the front, a first peripheral wall portion of the peripheral wall of the main body case is sacrificially broken and the fusible link holder is ejected outside the main body case. [Figure 7] Figure 7 is a top view illustrating how, when an external force acts on the electrical connection box from the side, a first peripheral wall portion of the peripheral wall of the main body case is sacrificially broken and the fusible link holder is ejected outside the main body case. DETAILED DESCRIPTION OF THE INVENTION

[0012] <Embodiment> Hereinafter, with reference to the drawings, an electric junction box 1 according to an embodiment of the present invention shown in Fig. 1 will be described. The electric junction box 1 is typically a relay box that is attached to a vehicle frame or the like and houses electronic components 2 such as relays.

[0013] As shown in Fig. 1, the electrical junction box 1 is a box-shaped body including a main body case 10 that will house electronic components 2 (and other components), such as relays, an upper cover 20 that is attached to the upper end of the main body case 10 so as to close the upper opening (opening end) of the main body case 10, and a lower cover 30 that is attached to the lower end of the main body case 10 so as to close the lower opening (opening end) of the main body case 10. Each of the main body case 10, the upper cover 20, and the lower cover 30 is a resin molded body. The main body case 10 corresponds to the "case" of the present invention.

[0014] For ease of explanation, the directions corresponding to the up-down direction, the front-rear direction, and the left-right direction of the vehicle in the electrical junction box 1 mounted on the vehicle are defined as the "up-down direction," the "front-rear direction," and the "left-right direction," respectively. The "up-down direction," "front-rear direction," and "left-right direction" are perpendicular to one another. In this example, the left side corresponds to the outer side of the vehicle, and the right side corresponds to the inner side of the vehicle. The main body case 10 that constitutes the electrical junction box 1 will be described in detail below.

[0015] As shown in Fig. 1, the main body case 10 has a cylindrical peripheral wall 11 that has a predetermined shape when viewed in the vertical direction and extends in the vertical direction. The peripheral wall 11 has a so-called two-layer wall structure that includes an inner wall 12 and an outer wall 13 that is spaced apart from the inner wall 12 and located outside the inner wall 12, all around the circumference. As shown in Fig. 5, the inner wall 12 and the outer wall 13 are connected in the thickness direction of the peripheral wall 11 by a plurality of connecting walls 16 that are spaced apart from each other in the circumferential direction of the peripheral wall 11.

[0016] As shown in FIG. 1, the internal space of the main body case 10 defined by the peripheral wall 11 is defined with a plurality of storage sections 14, each of which contains various electronic components 2 (and other components) such as relays.

[0017] 1, the internal space of the main body case 10 defined by the peripheral wall 11 is further provided with a single holder fitting portion 15 for fitting the fusible link holder 40. The holder fitting portion 15 is configured as a hollow portion having a substantially rectangular parallelepiped shape extending in the front-rear direction, corresponding to the fusible link holder 40 having a substantially rectangular parallelepiped shape extending in the front-rear direction. The fusible link holder 40 corresponds to the "holder" of this invention.

[0018] 4 and 5, the holder fitting portion 15 is disposed adjacent to an L-shaped peripheral wall portion of the peripheral wall 11, the L-shaped peripheral wall portion being made up of a peripheral wall portion 11A extending forward in the front-rear direction from a first corner portion 10a on the right rear side of the main body case 10, and a peripheral wall portion 11B extending leftward in the left-right direction from the first corner portion 10a. Therefore, the fusible link holder 40 fitted into the holder fitting portion 15 is also disposed adjacent to the L-shaped peripheral wall portion made up of the peripheral walls 11A and 11B.

[0019] 4 and 5, peripheral wall 11 also has an L-shaped peripheral wall portion made up of peripheral wall portion 11C extending forward in the front-rear direction from second corner 10b on the right rear side of main body case 10, and peripheral wall portion 11D extending leftward and rightward from second corner 10b. The front end of peripheral wall portion 11C extending in the front-rear direction is continuous with the left end of peripheral wall portion 11B extending leftward and rightward in the circumferential direction of peripheral wall 11, so that the L-shaped peripheral wall portion made up of peripheral wall portions 11C and 11D is continuous with the L-shaped peripheral wall portion made up of peripheral wall portions 11A and 11B in the circumferential direction of peripheral wall 11. Fusible link holder 40 fitted into holder fitting portion 15 is not adjacent to the L-shaped peripheral wall portion made up of peripheral wall portions 11C and 11D.

[0020] The fusible link holder 40 is a resin molded body, and as shown in FIG. 2 , has a substantially rectangular box shape extending in the front-rear direction. A plurality of electronic components 41, such as fuses, are attached to the upper part of the fusible link holder 40 so that they are exposed on the upper surface of the fusible link holder 40 and aligned in the front-rear and left-right directions. A bus bar 42 is built into the fusible link holder 40. The bus bar 42 is manufactured by processing a metal plate. The bus bar 42 is mainly composed of three flat plate-shaped sections aligned at intervals in the left-right direction and extending in the front-rear direction, and a pair of left and right fastening sections 42a is provided at the front end of the bus bar 42. The pair of left and right fastening sections 42a clamp a metal nut 43 so that it cannot rotate. When the bus bar 42 is built into the fusible link holder 40, the bus bar 42 is electrically connected to a plurality of electronic components 41, and the right fastening portion 42a of the pair of left and right fastening portions 42a is exposed to the outside through a notch 44 provided in the fusible link holder 40 (see FIG. 3). As can be seen from FIG. 3, a terminal 4 (glasses terminal) connected to an end of an electric wire 3 connected to an external power source (not shown) is fastened and fixed to the pair of left and right fastening portions 42a of the bus bar 42 using a nut 43 held between the pair of left and right fastening portions 42a and a bolt (not shown).

[0021] 4, in an L-shaped peripheral wall portion (hereinafter referred to as a "first peripheral wall portion") excluding a front region of peripheral wall portion 11A extending in the front-rear direction among the L-shaped peripheral wall portions made up of peripheral wall portions 11A, 11B adjacent to fusible link holder 40, and in an L-shaped peripheral wall portion (hereinafter referred to as a "third peripheral wall portion") excluding a left region of peripheral wall portion 11D extending in the left-right direction among the L-shaped peripheral wall portions made up of peripheral wall portions 11C, 11D not adjacent to fusible link holder 40, the upper edge of outer wall 13 of peripheral wall 11 is located lower (on the side away from the upper opening end of main body case 10) than in a peripheral wall portion of peripheral wall 11 other than the first peripheral wall portion and the third peripheral wall portion (hereinafter referred to as a "second peripheral wall portion"). In other words, in first peripheral wall portions 11A, 11B and third peripheral wall portions 11C, 11D, outer wall 13 is cut out downward. The vertical position of the upper edge of the inner wall 12 of the peripheral wall 11 is constant over the entire circumference. The first peripheral wall portion and the third peripheral wall portion are continuous with each other in the circumferential direction of the peripheral wall 11.

[0022] In this way, the casing body 10 has a structure in which the upper edge portions of the outer wall 13 of the first and third circumferential wall portions that are continuous in the circumferential direction of the circumferential wall 11 are located lower than the upper edge portion of the outer wall 13 of the second circumferential wall portion (i.e., a notched structure), so that the strength of the first and third circumferential wall portions is lower than the strength of the second circumferential wall portion. As a result, when a large external force is applied to the electrical junction box 1 and the fusible link holder 40 is pressed against the inner surface of the circumferential wall 11 of the casing body 10, the first and third circumferential wall portions that are continuous in the circumferential direction of the circumferential wall 11 are sacrificially broken, and the fusible link holder 40 can be ejected to the outside of the casing body 10 with damage to the fusible link holder 40 suppressed. Here, since the strength of the first peripheral wall portion and the strength of the third peripheral wall portion continuous with the first peripheral wall portion are both less than the strength of the second peripheral wall portion, the circumferential width of the peripheral wall 11 with reduced strength is wider than when the strength of only the first peripheral wall portion is less than the strength of the second peripheral wall portion, thereby facilitating the ejection of the fusible link holder 40 when an external force is applied to the electrical connection box 1.

[0023] 6 and 7, assume that, with the electrical junction box 1 mounted on a vehicle, a separate component 5A is disposed at a distance behind the electrical junction box 1 and a separate component 5B is disposed at a distance to the right of the electrical junction box 1. In this case, as shown in Fig. 6, when an external force (see the white arrow in the figure) caused by a vehicle collision or the like acts on the electrical junction box 1 from the front (the front of the vehicle), the fusible link holder 40 is pressed against the inner surface of a first peripheral wall portion (particularly, peripheral wall portion 11B) of the peripheral wall 11 of the main body case 10. On the other hand, as shown in Fig. 7, when an external force (see the white arrow in the figure) caused by a vehicle collision or the like acts on the electrical junction box 1 from the left (the outer side of the vehicle), the fusible link holder 40 is pressed against the inner surface of a first peripheral wall portion (particularly, peripheral wall portion 11A) of the peripheral wall 11 of the main body case 10. 6 and 7 , the first and third circumferential wall portions of the circumferential wall 11, which are continuous in the circumferential direction, are sacrificially broken, and the fusible link holder 40 can be ejected toward the space between the separate components 5A and 5B (in the direction of the black arrow in the figures) to the outside of the casing 10 while preventing damage to the fusible link holder 40. As will be understood from this description, even if an external force acts on the electrical junction box 1 from a direction between the front and left (i.e., the upper right corner of the paper in FIGS. 6 and 7 ), the fusible link holder 40 can be ejected toward the space between the separate components 5A and 5B to the outside of the casing 10, as described above. As a result, damage to the fusible link holder 40 and exposure of the bus bar 42 are prevented, and the bus bar 42 built into the ejected fusible link holder 40 is prevented from coming into contact with the metal frame of the vehicle, for example.

[0024] In this example, the electronic component 2 is also accommodated in a housing portion 14 separate from the holder fitting portion 15 into which the fusible link holder 40 is fitted. However, no bus bar is used in the housing portion 14, and current is passed to the electronic component 2 using ordinary terminals or the like that are sufficiently smaller than the bus bar. Therefore, even if the electrical junction box 1 is subjected to an external force such as that described above, there is little possibility that such terminals or the like will be exposed to the outside of the housing portion 14 or the main body case 10.

[0025] <Actions and Effects> As described above, according to the electrical junction box 1 of this embodiment, the fusible link holder 40 housed inside the casing body 10 of the electrical junction box 1 has metal parts (bus bar 42 and nut 43). The fusible link holder 40 is disposed adjacent to the circumferential wall 11 of the casing body 10. The casing body 10 is configured so that the strength of a first circumferential wall portion, which is at least a part of the circumferential wall 11 adjacent to the fusible link holder 40, is lower than the strength of a second circumferential wall portion, which is a circumferential wall located at a different position from the first circumferential wall portion. As a result, when a large external force is applied to the electrical junction box 1 and the fusible link holder 40 is pressed against the inner surface of the circumferential wall 11 of the casing body 10, the first circumferential wall portion is sacrificially broken, and the fusible link holder 40 is ejected to the outside of the casing body 10. As a result, the fusible link holder 40 is prevented from breaking and the metal parts 42, 43 are prevented from being exposed. Therefore, the electrical junction box 1 according to this embodiment can prevent the metal components 42 and 43 from being exposed even when an external force is applied to the electrical junction box 1.

[0026] Furthermore, in the electrical junction box 1 according to this embodiment, the strength of the third peripheral wall portion, which is the peripheral wall 11 where the fusible link holders 40 are not adjacent and which is continuous with the first peripheral wall portion in the circumferential direction, is configured to be less than the strength of the second peripheral wall portion, similar to the first peripheral wall portion. This increases the circumferential width of the peripheral wall 11 with reduced strength, thereby facilitating the ejection of the holder when an external force is applied to the electrical junction box 1.

[0027] Furthermore, according to the electrical connection box 1 of this embodiment, damage to the fusible link holder 40, which incorporates bus bars 42 and fastening parts 43 (e.g., nuts and bolts) that are highly rigid and likely to be exposed to the outside when an external force is applied, can be suppressed.

[0028] Furthermore, according to the electrical junction box 1 of this embodiment, the fusible link holder 40 has a structure in which at least a portion of the metal part 42 is exposed to the outside of the fusible link holder 40. Specifically, the metal part is a bus bar 42, and the bus bar 42 has a fastening portion 42a for fastening a terminal 4 connected to an external power supply, and the fusible link holder 40 has a structure in which the fastening portion 42a is exposed. In this case, compared to when the entire bus bar 42 is embedded inside the fusible link holder 40, the bus bar 42 is more likely to come into contact with the vehicle frame or the like when an external force is applied to the electrical junction box 1. The electrical junction box 1 of this embodiment can prevent contact between the metal part 42 and the vehicle frame or the like by facilitating the ejection of the fusible link holder 40 when an external force is applied to the electrical junction box 1.

[0029] <Other aspects> It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be adopted within the scope of the present invention. For example, the present invention is not limited to the above-described embodiments, and modifications, improvements, etc. are possible as appropriate. Furthermore, the material, shape, dimensions, number, location, etc. of each component in the above-described embodiments are arbitrary as long as they can achieve the present invention, and are not limited thereto.

[0030] For example, in the above embodiment, in order to make the strength of the first peripheral wall portion smaller than that of the second peripheral wall portion, the upper edge portion of peripheral wall 11 in the first peripheral wall portion is positioned lower (away from the upper opening end of main body case 10) than the upper edge portion of the second peripheral wall portion.

[0031] On the other hand, in order to make the strength of the first circumferential wall portion smaller than that of the second circumferential wall portion, the first circumferential wall portion may have a structure in which the spacing between the connecting walls 16 in the circumferential direction is wider than the spacing in the second circumferential wall portion. Furthermore, the first circumferential wall portion may have a structure in which the thickness of the circumferential wall 11 is thinner than the thickness of the circumferential wall 11 in the second circumferential wall portion. In addition, the first circumferential wall portion may have a hole penetrating the circumferential wall 11, and the second circumferential wall portion may have no hole.

[0032] Furthermore, in the above embodiment, the main body case 10 and the fusible link holder 40 are separate bodies, and the fusible link holder 40 is attached to the holder fitting portion 15 of the main body case 10. However, as long as the fusible link holder 40 can be separated from the other portions of the main body case 10 and removed when an external force is applied to the electrical junction box 1 as described above, the main body case 10 and the fusible link holder 40 may be configured as one body.

[0033] Here, the features of the electrical junction box 1 according to the present invention will be briefly summarized and listed below in [1] to [5].

[0034] [1] An electrical connection box (1) comprising: a case (10) having a cylindrical peripheral wall (11); and a holder (40) capable of holding an electronic component (41) and disposed inside the case (10), The holder (40) a metal part (42) to which the electronic part (41) is to be connected, the metal part (42) being disposed adjacent to the peripheral wall (11) of the case (10); The case (10) is The strength of a first peripheral wall portion, which is at least a part of the peripheral wall (11) adjacent to the holder (40), is smaller than the strength of a second peripheral wall portion, which is a peripheral wall (11) located at a position different from the first peripheral wall portion. Electrical junction box (1).

[0035] According to the electrical junction box having the configuration [1] above, the holder disposed inside the case of the electrical junction box has metal parts (e.g., bus bars, nuts and bolts for fastening external terminals, etc.). The holder is disposed adjacent to the peripheral wall of the case. The case is configured so that the strength of a first peripheral wall portion, which is at least a part of the peripheral wall to which the holder is adjacent, is lower than the strength of a second peripheral wall portion, which is a peripheral wall located at a different position from the first peripheral wall portion. As a result, when a large external force is applied to the electrical junction box and the holder is pressed against the inner surface of the peripheral wall of the case, the first peripheral wall portion sacrificially deforms, thereby reducing the external force acting on the holder. For example, the first peripheral wall portion is broken, and the holder is ejected to the outside of the case. As a result, exposure of metal parts from the holder is suppressed. Therefore, the electrical junction box of this configuration can suppress exposure of metal parts even when an external force is applied to the electrical junction box.

[0036] In addition, from the viewpoint of facilitating the ejection of the holder described above, it is preferable that the first peripheral wall portion of the case be located in a position that will leave as much space as possible between the electrical connection box and other surrounding components when the electrical connection box is mounted on a vehicle, etc.

[0037] [2] In the electrical connection box (1) described in [1] above, The first peripheral wall portion is a structure in which an opening edge portion of the peripheral wall (11) in the first peripheral wall portion is positioned in a direction away from the opening end of the case (10) than an opening edge portion of the second peripheral wall portion; a structure in which the peripheral wall (11) has an inner wall (12), an outer wall (13), and a plurality of connecting walls (16) connecting the inner wall (12) and the outer wall (13), and the spacing between the connecting walls (16) in the circumferential direction in the first peripheral wall portion is wider than the spacing between the connecting walls (16) in the second peripheral wall portion; a structure in which the thickness of the peripheral wall (11) at the first peripheral wall portion is thinner than the thickness of the peripheral wall (11) at the second peripheral wall portion; and the first peripheral wall portion has a hole portion penetrating the peripheral wall (11), and the second peripheral wall portion has no hole portion; Electrical junction box (1).

[0038] According to the electrical junction box having the configuration [2] above, the first peripheral wall portion has a structure in which, for example, the opening edge of the peripheral wall of the first peripheral wall portion is positioned farther away from the open end of the case than the opening edge of the second peripheral wall portion (in other words, a notched structure). This makes the strength of the first peripheral wall portion smaller than the strength of the second peripheral wall portion. Similarly, in terms of reducing the strength of the first peripheral wall portion, the first peripheral wall portion may have a structure in which the spacing between the connecting walls in the circumferential direction is wider than the spacing between the connecting walls in the second peripheral wall portion. Furthermore, the first peripheral wall portion may have a structure in which the thickness of the peripheral wall is thinner than the thickness of the peripheral wall in the second peripheral wall portion. In addition, the first peripheral wall portion may have a hole penetrating the peripheral wall, while the second peripheral wall portion has no hole.

[0039] [3] In the electrical connection box (1) described in [1] above, The case (10) is The strength of the third peripheral wall portion, which is the peripheral wall (11) that is not adjacent to the holder (40) and is continuous with the first peripheral wall portion in the circumferential direction, is smaller than the strength of the second peripheral wall portion. Electrical junction box (1).

[0040] According to the electrical junction box having the configuration [3] above, the strength of the third peripheral wall portion, which is a peripheral wall where the holders are not adjacent and which is continuous with the first peripheral wall portion in the circumferential direction, is configured to be less than the strength of the second peripheral wall portion, similar to the first peripheral wall portion. This increases the circumferential width of the peripheral wall with reduced strength, thereby facilitating the ejection of the holder when an external force is applied to the electrical junction box.

[0041] [4] In the electrical connection box (1) described in [1] above, The metal part is At least one of a bus bar (42) and a fastening component (43) for fastening an external terminal (4) to the bus bar (42). Electrical junction box (1).

[0042] According to the electrical connection box having the configuration [4] above, it is possible to prevent damage to the holder that contains bus bars and fastening parts (e.g., nuts and bolts) that are highly rigid and likely to be exposed to the outside when an external force is applied.

[0043] [5] In the electrical connection box (1) described in [1] above, The holder (40) The metal part (42) is disposed inside the holder (40) so that at least a portion of the metal part (42) is exposed to the outside of the holder (40). Electrical junction box (1).

[0044] According to the electrical junction box having the configuration [5] above, the holder has a structure in which at least a portion of the metal component is exposed to the outside of the holder. For example, if the metal component is a bus bar and the bus bar has a fastening point for fastening a terminal connected to an external power source, the holder has a structure in which the fastening point is exposed. In this case, the bus bar is more likely to come into contact with the vehicle frame or the like when an external force is applied to the electrical junction box than when the bus bar is entirely embedded inside the holder. The electrical junction box of this configuration can prevent contact between the metal component and the vehicle frame or the like by facilitating ejection of the holder when an external force is applied to the electrical junction box. [Explanation of symbols]

[0045] 1 Electrical junction box 4 terminals (external terminals) 10 Main unit case (case) 11 Peripheral wall 12 Inner wall (inner wall) 13 Outer wall (outer wall) 16 Connecting Wall 40 Fusible link holder (holder) 41 Electronic Components 42 Busbar (metal part) 43 Nuts (metal parts, fastening parts)

Claims

1. An electrical connection box comprising: a case having a cylindrical peripheral wall; and a holder capable of holding an electronic component and disposed inside the case, The holder is a metal part to which the electronic part is to be connected, the metal part being disposed adjacent to the peripheral wall of the case; The case is The strength of a first peripheral wall portion, which is at least a part of the peripheral wall adjacent to the holder, is smaller than the strength of a second peripheral wall portion, which is the peripheral wall at a position different from the first peripheral wall portion. Electrical junction box.

2. The electrical junction box according to claim 1, The first peripheral wall portion is a structure in which an opening edge portion of the peripheral wall of the first peripheral wall portion is positioned in a direction away from the open end of the case than an opening edge portion of the second peripheral wall portion; a structure in which the peripheral wall has an inner wall, an outer wall, and a plurality of connecting walls connecting the inner wall and the outer wall, and the spacing between the connecting walls in the circumferential direction in the first peripheral wall portion is wider than the spacing between the connecting walls in the second peripheral wall portion; a structure in which the thickness of the peripheral wall at the first peripheral wall portion is thinner than the thickness of the peripheral wall at the second peripheral wall portion; and the first peripheral wall portion has a hole portion penetrating the peripheral wall, and the second peripheral wall portion does not have the hole portion; Electrical junction box.

3. The electrical junction box according to claim 1, The case is The strength of a third peripheral wall portion, which is the peripheral wall that is not adjacent to the holder and is continuous with the first peripheral wall portion in the circumferential direction, is smaller than the strength of the second peripheral wall portion. Electrical junction box.

4. The electrical junction box according to claim 1, The metal part is At least one of a bus bar and a fastening component for fastening an external terminal to the bus bar. Electrical junction box.

5. The electrical junction box according to claim 1, The holder is The metal component is disposed inside the holder so that at least a portion of the metal component is exposed to the outside of the holder. Electrical junction box.

Images