Electrical junction box

Abstract

Electrical junction box (1), comprising: a lower cover (2) with an opening (21); a locked section (26) formed on a lower side wall (23) of the lower cover (2); an upper cover (3) that closes the opening (21) of the lower cover (2); a locking section (36) formed on an upper side wall (33) of the upper cover (3) and locked by the locked section (26) to prevent the upper cover (3) from moving in a separating direction to the lower cover (2); a contact rib (37) formed on the upper side wall (33) projects towards the lower side wall (23) and has a distal end formed close to one side of an assembly direction in which the upper cover (3) is assembled with respect to the lower cover (2) compared to the locked section (26); and a locking section slot (33b) formed between the locking section (36) and the contact rib (37) on the upper side wall (33), wherein the contact rib (37) contacts the lower side wall (23) when the upper cover (3) is assembled with the lower cover (2).

Description

Background of the invention 1. Field of the invention

[0001] The present invention relates to an electrical junction box. 2. Description of the state of the art

[0002] Traditionally, an electrical junction box (also called a terminal box, fuse box, relay box or the like) is known to be attached to a vehicle, such as an automobile, and which jointly houses connection processing components, such as a wiring harness and electronic components, such as a fuse, a relay and an electronic control unit.

[0003] In the conventional electrical junction box, a locking section formed on an upper side wall of an upper cover is locked to a locking section formed on a lower side wall by moving the upper cover in the mounting direction relative to a lower cover, whereby the upper cover is assembled with the lower cover by preventing the upper cover from moving in a separating direction opposite to the mounting direction relative to the lower cover.Furthermore, in the conventional electrical junction box, a rib is formed on the lower side wall and a slot is formed in the upper side wall, and the rib is inserted into the slot at the time of assembly of the lower cover and the upper cover, thereby carrying out the positioning of the upper cover with respect to the lower cover (published Japanese patent application no. JP 2006-275084 A).

[0004] However, positioning in a plane orthogonal to the mounting direction is important for positioning the upper cover relative to the lower cover. In the case of inserting the rib into the slot, as with a conventional electrical junction box, the slot width is designed to be larger than the rib width, so that a gap forms between the rib and the slot when the rib is inserted. Therefore, there is a risk of rattling and abnormal noises occurring when the upper and lower covers are connected.

[0005] From DE 92 09 557 U1, a plastic housing is known which has two housing parts which are connected to each other by a detachable snap connection. The snap connection consists of a tab with a spring-loaded locking tongue arranged on the wall of one housing part and a counter-lock arranged on the wall of the other housing part.

[0006] From DE 18 21 751 U, a housing for distribution or connection boxes is known. The housing has two housing parts, one of which has spring-loaded tabs. This allows the housing parts to be easily locked together. Summary of the invention

[0007] The present invention was conceived in view of the problem described above, and it is an object of it to provide an electrical junction box that is capable of reliably performing a positioning of an upper cover with respect to a lower cover.

[0008] The problem is solved by the subject matter of claim 1.

[0009] According to a further aspect of the present invention, the electrical junction box preferably also comprises a contact rib slot formed on a side opposite the locking section slot, with the contact rib being arranged between them.

[0010] The foregoing and further tasks, features, advantages, as well as the technical and industrial significance of this invention will be better understood by reading the following detailed description of the present preferred embodiments of the invention, when they are considered in conjunction with the accompanying drawings. Brief description of the drawings Fig. Figure 1 shows a perspective view of an electrical junction box according to one embodiment; Fig. 2. shows a perspective exploded view of the electrical junction box according to the embodiment; Fig. Figure 3 shows a perspective view of an upper cover according to the embodiment; Fig. 4 a partial top view of the upper cover according to the embodiment; Fig. Figure 5 shows a partial bottom view of the electrical junction box according to the embodiment; and Fig. Figure 6 shows a partial cross-sectional view of the electrical junction box according to the embodiment. Detailed description of preferred embodiments

[0011] An embodiment of the present invention is described in detail below with reference to the drawings. The present invention is not limited by this embodiment. Furthermore, components in the following embodiment include one that can be replaced by a person skilled in the field or that is substantially the same. embodiment

[0012] An electrical junction box according to one embodiment is described. Fig. Figure 1 shows a perspective view of the electrical junction box according to the embodiment. Fig. Figure 2 shows a perspective exploded view of the electrical junction box according to the embodiment. Fig. Figure 3 shows a perspective view of an upper cover according to the embodiment. Fig. Figure 4 shows a partial top view of the upper cover according to the embodiment. Fig. Figure 5 shows a partial floor view of the electrical junction box according to the embodiment. Fig. Figure 6 shows a partial cross-sectional view of the electrical junction box according to the embodiment.

[0013] An electrical junction box 1 according to the present embodiment is mounted on a vehicle, such as an automobile, and distributes electrical energy supplied by a power supply, such as a battery, to various electronic devices mounted on the vehicle via various electronic components or the like. The electrical junction box 1 is installed in a location exposed to the external environment, such as the vehicle's engine compartment or the like, and is connected between the power supply and the various electronic devices. The electrical junction box 1 can form a wiring harness together with an electrical wire.The electrical junction box 1 is sometimes referred to as a terminal box, a fuse box, a relay box or the like, depending on the type of electronic component to be housed in it, and these terms are collectively referred to as the “electrical junction box” of the present embodiment.

[0014] In the following description, an X-direction in the drawing represents a vertical direction of the electrical junction box 1 according to the present embodiment. Of the X-directions, X1 is an upward direction and X2 is a downward direction. A Y-direction in the drawing represents a width direction of the electrical junction box 1 according to the present embodiment and is orthogonal to the vertical direction. Of the Y-directions, Y1 is one direction and Y2 is the other. A Z-direction in the drawing represents a thickness direction of the electrical junction box 1 according to the present embodiment and is orthogonal to both the vertical and width directions. Of the Z-directions, Z1 is a disconnection direction and Z2 is an assembly direction.

[0015] The electrical junction box 1 according to the present embodiment has a rectangular parallelepiped shape. As in Fig. As shown in Figure 1 and the like, the electrical junction box 1 is configured to have a lower cover 2, an upper cover 3, a busbar 4, a nut 5, a locking section 26, a locking section 36, a contact rib 37, a locking section slot 33b, and a contact rib slot 33d. As shown in Figure 1 and the like, the electrical junction box 1 is configured to have a lower cover 2, an upper cover 3, a busbar 4, a nut 5, a locking section slot 26, a locking section 36, a contact rib slot 37, a locking section slot 33b, and a contact rib slot 33d. Fig. As shown in Figure 2, the lower cover 2 and the upper cover 3 are engaged to form an inner space 6 which accommodates the busbar 4 and the nut 5.

[0016] The lower cover 2 engages with the upper cover 3 and together they form the inner space 6. The lower cover 2 is formed using an insulating material, such as a synthetic resin. The lower cover 2 of the present embodiment has a box shape and an opening 21 at one end on one side of the parting line between the two ends in the thickness direction. As shown in Fig. 2 and Fig. As shown in Figure 4, the lower cover 2 comprises a bottom 22, a lower side wall 23, a nut retaining section 24, a first rib 25 and a locked section 26.

[0017] The base 22 has a flat, plate-like shape. The base 22 is formed with the lower side wall 23 such that the latter is raised from an outer circumference in the direction of the separation. The base 22 is formed with the nut-retaining section 24 and the first rib 25, which are also raised in the direction of separation.

[0018] The lower side wall 23 has a tubular shape when viewed in the thickness direction. One end of the lower side wall 23 on one side of the assembly direction between the two ends in the thickness direction is connected to the base 22, and the opening 21 is formed by an end on one side of the separation direction. The interlocking sections 26, which are locked by the interlocking sections 36, are each formed on sections of the lower side wall 23 in accordance with the four sides that form an outer circumference of the lower cover 2.

[0019] The nut-holding section 24 holds the nut 5. The nut-holding section 24 is arranged upright from the base 22 in the direction of separation. On the mounting-direction side of the first rib 25, the nut-holding section 24 is formed in the thickness direction, meaning that it is designed such that, when viewed from the base 22, it is lower than the first rib 25. The nut-holding section 24 has a cylindrical shape and an opening 24a through which the nut 5 can be inserted. The opening 24a of the nut-holding section 24 is in contact with a surface of the busbar 4 on the mounting-direction side. The nut-holding section 24 of the present embodiment is designed such that two nut-holding sections form a pair, and it is possible to arrange the individual busbar 4 with respect to the two nut-holding sections 24.

[0020] The first rib 25 defines a position of the busbar 4 with respect to the lower cover 2 in an assembled state of the lower cover 2 and the upper cover 3, that is, in an assembled state. The first rib 25 is formed from at least four first ribs 25, which are formed from two opposing pairs, with the busbar 4 arranged between them. One pair corresponds to the first ribs 25 and 25 that are opposite each other in the vertical direction, and the other pair corresponds to the first ribs 25 and 25 that are opposite each other in the lateral direction.From a vertical perspective, an area enclosed by the corresponding first ribs 25—that is, the area enclosed by the first ribs 25, in which one pair of first ribs 25 and 25 extends in the lateral direction and the other pair of first ribs 25 and 25 extends in the vertical direction—is configured such that it is wider than the corresponding busbar 4. Furthermore, a vertical distance is formed between one pair of first ribs 25 and 25 that is greater than a length in the vertical direction of the nut-holding section 24. Furthermore, a lateral distance is formed between the other pair of first ribs 25 and 25 that is greater than a length in the lateral direction of the nut-holding section 24. Each of the first ribs 25 can be present on the base 22 on its own, or two or more first ribs 25 can be connected.When two or more first ribs 25 are connected, the considerable number of first ribs 25 in the lower cover 2 can be reduced and the strength of the first ribs 25 can be improved.

[0021] The locked section 26 is formed on the lower side wall 23 and, in the assembled state, is locked by the locking section 36. The locked section 26 is formed on an outer circumferential surface 23a of the lower side wall 23 and, in the assembled state, projects towards an upper side wall 33, which will be described later, from the opposite upper cover 3. Each of the locked sections 26 corresponds to each of the locking sections 36.

[0022] The upper cover 3 engages with the lower cover 2 and closes the opening 21 of the lower cover 2 to form the inner space 6. The upper cover 3 is formed using an insulating material, such as a synthetic resin. The upper cover 3 of the present embodiment has a box shape and an opening 31 at one end on the mounting-direction side between both ends in the thickness direction. The upper cover 3 comprises a top 32, the upper side wall 33, a front connector opening 34, a second rib 35, the locking section 36, and a contact rib 37.

[0023] The ceiling 32 has a flat, panel-like shape. The ceiling 32 is designed such that the upper side wall 33 is arranged upright from an outer circumference in the direction of assembly. The front connector opening 34 is formed on the ceiling 32. The second rib 35, which is arranged upright in the direction of assembly, is formed on the ceiling 32.

[0024] The upper side wall 33 has a tubular shape when viewed in the thickness direction. One end of the upper side wall 33 on the separation direction side is connected to the cover 32 between both ends in the thickness direction, and the opening 31 is formed by one end on the assembly direction side. The opening 31 is designed to be wider than an outer circumference of the lower cover 2 when viewed in the thickness direction. The locking sections 36, by which the locked sections 26 are locked, are each formed on sections of the upper side wall 33 in accordance with the four sides that form an outer circumference of the upper cover 3. The upper side wall 33 has a pair of locking section slots 33b and 33b, which are provided on each side where each of the locking sections 36 is formed.One end on the mounting direction side of the locking section slot 33b extends to an end on the mounting direction side of the upper side wall 33 and is in contact with the outside. One end on the separation direction side of the locking section slot 33b of the present embodiment extends to an end on the separation direction side of the upper side wall 33, that is, a section connected to the ceiling 32. The pair of locking section slots 33b and 33b is formed with the locking section 36 between them in the extension direction of the upper side wall 33, that is, in the vertical or width direction. That is, the locking section slot 33b is provided between the locking section 36 and the contact rib 37, which will be described later.The upper side wall 33 comprises a pair of contact rib slots 33d and 33d, formed on each side where each of the locking sections 36 is formed. Each of the contact rib slots 33d is configured to correspond to each of the locking section slots 33b. One end on the mounting direction side of the contact rib slot 33d extends to the end on the mounting direction side of the upper side wall 33 and is in contact with the outside. One end on the separation direction side of the contact rib slot 33d of the present embodiment extends to the end on the separation direction side of the upper side wall 33, that is, the section that is connected to the ceiling 32.The pair of contact rib slots 33d and 33d is formed on one side opposite the locking section slots 33b, with the contact rib 37 being arranged between them in the extension direction of the upper side wall 33, i.e. in the vertical direction or the width direction.

[0025] The front connector opening 34 connects the busbar 4 and an external connector terminal (not shown) and is arranged such that the busbar 4, which is housed in the inner space 6, is exposed to the outside. The front connector opening 34 is designed to penetrate the ceiling 32 in the thickness direction. In the assembled state, the front connector opening 34 is designed to be opposite a through-hole 4a of the busbar 4 and a screw hole 5a of the nut 5, both of which will be described later, in the thickness direction. The front connector opening 34 according to the present embodiment is designed such that two front connector openings form a pair corresponding to the individual busbar 4.

[0026] The second rib 35 restricts a position of the busbar 4 relative to the upper cover 3 in an assembled state of the lower cover 2 and the upper cover 3, that is, in an assembled state. The second rib 35 is formed from at least four second ribs 35, which are formed from two opposing pairs, with the busbar 4 arranged between them. One pair corresponds to the second ribs 35 and 35, which are opposite each other in the vertical direction, and the other pair corresponds to the second ribs 35 and 35, which are opposite each other in the width direction.From a vertical perspective, an area enclosed by the corresponding second ribs 35—that is, the area enclosed by the corresponding second ribs 35 such that one pair of second ribs 35 and 35 extends in the width direction and the other pair of second ribs 35 and 35 extends in the vertical direction—is designed to be wider than the corresponding busbar 4. Furthermore, a vertical distance is formed between one pair of second ribs 35 and 35 that is greater than a length in the vertical direction of the nut-holding section 24. A width-directed distance is also formed between the other pair of second ribs 35 and 35 that is greater than a length in the width direction of the nut-holding section 24. Each of the second ribs 35 can be provided individually on the ceiling 32, or two or more second ribs 35 can be connected.If two or more second ribs 35 are joined, the essential number of second ribs 35 in the upper cover 3 can be reduced and the strength of the second ribs 35 can be improved.

[0027] The first rib 25 and the second rib 35 are positioned differently when viewed from the mounting direction of the lower cover 2 and the upper cover 3, i.e., from the thickness direction. According to the present embodiment, the first rib 25 and the second rib 35 are designed such that they do not overlap when viewed from the thickness direction.

[0028] The locking section 36 is formed on the upper side wall 33 and locks the locked section 26 into the locked state. The locking section 36 is provided on an inner circumferential surface 33a of the upper side wall 33 and is designed such that, in the assembled state, it projects towards the opposite lower side wall 23. Each of the locking sections 36 corresponds to each of the locked sections 26. Each of the locking sections 36 is formed in each of the locking section wall segments 33c, which are provided between the pair of locking section slots 33b and 33c of the upper side wall 33. A projection of the locking section 36 from the inner circumferential surface 33a is formed such that at least a portion of it overlaps the locked section 26 in the assembled state from the thickness direction.Furthermore, the projection of the locking section 36 from the inner circumferential surface 33a, that is, a separation distance between the pair of locking sections 36 and 36, which are opposite each other in the vertical direction or the width direction, is designed such that it is wider than a separation distance of the outer circumferential surface 23a between a pair of two sides of the lower side wall 23, which are opposite each other in the vertical direction or the width direction.

[0029] The contact rib 37 is formed on the upper side wall 33 and, in the assembled state, is in contact with the lower side wall 23. The contact rib 37 is formed on the inner circumferential surface 33a of the upper side wall 33 and is designed such that, in the assembled state, it projects towards the opposite lower side wall 23. The contact rib 37 of the present embodiment has an end on the assembly-direction side that extends to the vicinity of the end on the assembly-direction side of the upper side wall 33, and an end on the separation-direction side that is designed to be connected to the cover 32. The contact rib 37 is designed such that the end on the assembly-direction side, i.e., a distal end, is located closer to the assembly-direction side than the end on the assembly-direction side of the locking section 36.The projection of the contact rib 37 from the inner circumferential surface 33a, that is, the separation distance between the pair of contact ribs 37 that are opposite each other in the vertical or lateral direction, is designed such that it is narrower than the separation distance of the outer circumferential surface 23a between the pair of two sides of the lower side wall 23 that are opposite each other in the vertical or lateral direction. Furthermore, the projection of the contact rib 37 from the inner circumferential surface 33a is designed such that it is larger than the projection of the locking section 36, which is formed on the same side of the upper side wall 33. Each of the contact ribs 37 is provided in each of the contact rib wall sections 33e that is formed between the locking section slot 33b and the contact rib slot 33d of the upper side wall 33.The pair of contact rib wall sections 33e is configured such that the locking section wall section 33c is arranged between them. The contact rib 37 of the present embodiment is configured to have a smaller projection.

[0030] The busbar 4, in its assembled state, is arranged in the inner space 6 and electrically connected to the external connector terminal. The busbar 4 is formed using a conductive, plate-shaped element, such as copper. The busbar 4 is formed, for example, by cutting and bending a metal plate, which is the base material, using a press or the like. As shown in Fig. As shown in Figure 2, the busbar 4 of the present embodiment is formed in an L-shape or an S-shape when viewed from the thickness direction. In the assembled state, the busbar 4 is held between one pair of first ribs 25 and 25, between the other pair of first ribs 25 and 25, between one pair of second ribs 35 and 35, and between the other pair of second ribs 35 and 35. The busbar 4 has a through-hole 4a into which a screw element can be inserted, which has been inserted through a through-hole (not shown) of a connector terminal (not shown). A pair of through-holes 4a is formed at both ends in the width direction of the busbar 4 of the present embodiment.This means that the busbar 4 is arranged such that it is exposed at both ends in the width direction from the front connector opening 34 and is electrically connected to the external connector connection.

[0031] The nut 5, in its assembled state, is received in the inner space 6 and secures the screw element, which is inserted through the through-hole (not shown) of the external connector terminal and the through-hole 4a of the busbar 4. The nut 5 has a rectangular parallelepiped shape and a screw hole 5a to which the screw element is attached. According to the present embodiment, the nut 5 is designed such that two nuts form a pair to accommodate a single busbar 4.

[0032] Next, the assembly of the electrical junction box 1 is described. First, the nut 5 is held by each of the nut-retaining sections 24 of the lower cover 2. Then, the busbar 4 is positioned relative to the lower cover 2. Specifically, the respective busbars 4 are assembled such that the lower cover 2 rests on the corresponding pair of nut-retaining sections 24. At this point, each busbar 4 is sandwiched between one pair of the first ribs 25 and 25 and between the other pair of the first ribs 25 and 25. In this way, the positioning of each busbar 4 relative to the lower cover 2 is carried out.

[0033] The upper cover 3 is then assembled with the lower cover 2. Specifically, the upper cover 3 is positioned relative to the lower cover 2 such that the opening 31 is opposite the opening 21 of the lower cover 2 in the thickness direction, and the upper cover 3 is moved in the assembly direction relative to the lower cover 2. Since at this point the end of the assembly direction of the contact rib 37 is formed on the assembly direction side of the locking section 36, the pair of contact ribs 37 and 37, which are formed on each side of the upper side wall 33, are initially brought into contact with the outer circumferential surface 23a of the lower side wall 23.If the upper cover 3 is moved further in the assembly direction with reference to the lower cover 2, the contact rib wall pieces 33e are deformed where the contact ribs 37 and 37 are formed, with the end on the separation direction side as a base point towards the outside of the lower side wall 23 (see M1 in . Fig. 5) That is, the upper cover 3 is pressed towards the center of the lower cover 2 in a plane defined by the vertical and horizontal directions, i.e., the horizontal plane, through each of the contact rib wall sections 33e. Since at this point the locking section wall section 33c is independent of the contact rib wall section 33e, the locking section 36 does not deform towards the outside of the lower side wall 23. If the upper cover 3 is moved further in the assembly direction with respect to the lower cover 2, the locking section 36, which is formed on each side of the upper side wall 33, is brought into contact with the outer circumferential surface 23a of the lower side wall 23. If the upper cover 3 is moved further in the assembly direction with respect to the lower cover 2, the locking section 36 is brought into contact with the locked section 26.If the upper cover 3 is moved further in the assembly direction with reference to the lower cover 2, the locking section wall piece 33c deforms where the locking section 36 is formed, with the end on the separation direction side as a base point towards the outside of the lower side wall 23 (see M2 in . Fig.5) As the upper cover 3 is moved further in the assembly direction with respect to the lower cover 2, the locking section 36 is moved over the locked section 26 in the assembly direction, and thus the locking section 36 is positioned on the assembly direction side with respect to the locked section 26. Consequently, the lower cover 2 is covered by the upper cover 3 and the opening 21 is closed by the upper cover 3. At this point, each of the busbars 4, which are positioned with respect to the lower cover 2 by the first ribs 25, is positioned between one pair of second ribs 35 and 35 and between the other pair of second ribs 35 and 35. In this way, the positioning of each busbar 4 with respect to the upper cover 3 is carried out.Even in the state in which the upper cover 3 is assembled with the lower cover 2, the upper cover 3 is in the state in which it is pressed by the respective contact rib wall pieces 33e towards the center of the lower cover 2 in the plane formed by the vertical direction and the width direction.

[0034] The screw element is then inserted into the front connector opening 34 in the position in which it is inserted into the through-hole of the external connector terminal. The screw element, inserted into the front connector opening 34, is then inserted into the through-hole 4a of the busbar 4. The screw element is then secured to the nut 5 by screwing the screw element, which was inserted into the through-hole, into the screw hole 5a of the nut 5. As a result, the external connector terminal and the busbar 4 are electrically connected, current from outside the electrical junction box 1 is supplied to the busbar 4, and current is supplied to the other electronic device via the external connector terminal, which is electrically connected to the same busbar 4.

[0035] As previously described, the electrical junction box 1 of the present embodiment maintains the state in which, in the assembled state, the upper cover is pressed towards the center of the lower cover 52 2 in the horizontal plane by the corresponding contact rib wall sections 33e, thus limiting the relative movement of the upper cover 3 in the horizontal plane with respect to the lower cover 2. This makes it possible to reliably position the upper cover 3 with respect to the lower cover 2 and to reliably suppress the occurrence of rattling or abnormal noise in the assembled state.

[0036] Furthermore, since the locking section slot 33b is formed between the contact rib 37 and the locking section 36, the locking section wall piece 33c, where the locking section 36 is formed, does not deform even if the contact rib wall piece 33e, where the contact rib 37 is formed, is deformed. Thus, even if the position of the contact rib 37 changes in the assembled state from its position before assembly, the relative positions of the locking section 36 and the locked section 26 do not change in the assembled state. Therefore, it is possible to reliably maintain a locking state of the locked section 26 by the locking section 36 in a state in which the positioning of the upper cover 3 with respect to the lower cover 2 is reliably carried out.As a result, it is possible to reliably prevent the upper cover 3 from moving in the separation direction from the lower cover 2 in the assembled state using the locking section 36 and the locked section 26.

[0037] Furthermore, the contact rib wall section 33e can be easily deformed because the contact rib slot 33d is formed on the opposite side of the locking section slot 33b, with the contact rib 37 positioned between them. Therefore, the compressive force exerted when moving the upper cover 3 in the assembly direction with respect to the lower cover 2 can be reduced when the contact rib 37 is in contact with the lower side wall 23, compared to when the contact rib slot 33d is not formed. Consequently, the upper cover 3 and the lower cover 2 can be easily assembled.

[0038] The contact rib 37 is formed on the upper cover 3 in the electrical junction box 1 of the previously described embodiment, although the invention is not limited thereto, and the contact rib can also be formed on the lower cover 2. In this case, the interlocked section slots are formed with the interlocked section 26 arranged between them. Furthermore, a contact rib slot is formed on the opposite side of the interlocked section slot with the contact rib between them.

[0039] Furthermore, each busbar 4 is connected to the lower cover 2 in the electrical junction box 1 of the embodiment described above, the invention being not limited thereto, and each of the busbars 4 can first be assembled with the upper cover 3 and then the upper cover 3 can be connected to the lower cover 2.

[0040] An electrical junction box according to the present embodiments achieves the effect that it is possible to reliably carry out the positioning of the upper cover with respect to the lower cover.

Claims

[1] Electrical junction box (1) comprising: a lower cover (2) with an opening (21); a locked section (26) formed on a lower side wall (23) of the lower cover (2); an upper cover (3) that closes the opening (21) of the lower cover (2); a locking section (36) formed on an upper side wall (33) of the upper cover (3) and locked by the locked section (26) to prevent the upper cover (3) from moving in a separating direction to the lower cover (2); a contact rib (37) formed on the upper side wall (33) projects towards the lower side wall (23) and has a distal end formed close to one side of an assembly direction in which the upper cover (3) is assembled with respect to the lower cover (2) compared to the locked section (26); and a locking section slot (33b) formed between the locking section (36) and the contact rib (37) on the upper side wall (33), wherein the contact rib (37) contacts the lower side wall (23) when the upper cover (3) is assembled with the lower cover (2). [2] Electrical junction box (1) according to claim 1, further comprising: a contact rib slot (33d) formed on a side opposite the locking section slot (33b), with the contact rib (37) arranged between them.

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