Electrical junction box

Abstract

To provide a technology to realize small electric connection boxes.SOLUTION: An electric connection box includes a case, a protrusion protruding from the surface of the case and made of an insulator, a first bus bar arranged on the surface of the case, and a second bus bar arranged at the end of the protrusion and above the first bus bar with a gap between them.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] This specification discloses a technology related to an electrical connection box.

Background Art

[0002] Patent Document 1 discloses an electrical connection box for connecting electronic components. In the electrical connection box of Patent Document 1, a plurality of bus bars are arranged on the surface of the case. Also, in order to prevent the bus bars from being electrically connected to each other, a gap is provided between each bus bar.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] As described above, in Patent Document 1, a plurality of bus bars are arranged onthe surface of the case. In order to ensure a gap between each bus bar, it is necessary to secure an area larger than the total area of the arranged bus bars in the surface direction (width direction) of the case. As a result, as the number of arranged bus bars increases, the size of the electrical connection box (case) increases, and it is difficult to realize a small electrical connection box. This specification aims to devise the arrangement form of the bus bar with respect to the case and realize a small electrical connection box.

Means for Solving the Problems

[0005] The first technology disclosed in this specification is an electrical connection box, which may include a case, a protruding portion that protrudes from the surface of the case and is made of an insulator, a first bus bar arranged on the surface of the case, and a second bus bar arranged at an end of the protruding portion and provided above the first bus bar with a gap from the first bus bar.

[0006] A second technology disclosed herein is an electrical junction box of the first technology, wherein a plurality of the protrusions are provided on the case at intervals, the first busbar is located in the region sandwiched by the plurality of protrusions, and the second busbar may be located at each end of the plurality of protrusions.

[0007] A third technology disclosed herein is an electrical junction box of the first or second technology, wherein the second busbar may have a recess for accommodating the end of the protrusion.

[0008] A fourth technology disclosed herein is an electrical junction box of the first or second technology, wherein the second busbar has a projection extending toward the surface of the case, and the projection may be located on the end side of the second busbar beyond the portion where the end face of the projection contacts the second busbar.

[0009] A fifth technology disclosed herein is an electrical junction box of the first or second technology, wherein the end of the protrusion is provided with a bent portion that extends from the portion where the end face of the protrusion contacts the second busbar toward the end of the second busbar, and then bends toward a direction away from the surface of the case.

[0010] A sixth technology disclosed herein is an electrical junction box of the first or second technology, wherein the second busbar may have a notch or through hole to maintain a gap with the portion extending above the first busbar.

[0011] The seventh technology disclosed herein is an electrical junction box of the first or second technology, which may include a projection for a first busbar that protrudes from the surface of the case, is made of an insulator, and has the first busbar positioned at its end. [Effects of the Invention]

[0012] According to the first technology, when viewed from above (the surface of the case is observed from above), the first and second busbars can be arranged in an overlapping manner. As a result, the size of the case in the planar direction (width direction) for arranging the busbars can be made less than or equal to the total area of ​​the busbars to be arranged. Consequently, the size of the case in the planar direction can be reduced, enabling the realization of a compact electrical junction box. In addition, a longer creepage distance can be ensured between the first and second busbars, preventing electrical conductivity between the busbars.

[0013] The first busbar and the second busbar may be connected to the same electronic component or to different electronic components. For example, when the first and second electronic components are connected to an electrical junction box, both the first and second busbars may be connected to the same electronic component (either the first or second electronic component), or the first busbar may be connected to one of the electronic components and the second busbar to the other.

[0014] According to the second technology, since the second busbar is supported by multiple protrusions, the second busbar can be stably held on the protrusions. As a result, it is possible to prevent the second busbar from falling off the protrusions.

[0015] According to the third technology, since the end (tip) of the protrusion is inserted into the recess of the second busbar, the second busbar can be held more stably on the protrusion. Furthermore, when placing the second busbar in an electrical junction box, the second busbar can be positioned relative to the electrical junction box (protrusion) simply by inserting the end of the protrusion into the recess of the second busbar. In addition, by inserting the end of the protrusion into the recess of the second busbar, it is possible to more reliably prevent the second busbar from falling off the protrusion.

[0016] According to the fourth technology, in the direction of projection of the protrusion (typically upward), the end of the second busbar (the end in the width direction) covers a portion of the side surface of the protrusion (the surface perpendicular to the direction of projection of the protrusion). As a result, it is possible to prevent the second busbar from falling off the protrusion. Furthermore, the cross-sectional area of ​​the second busbar (the cross-sectional area of ​​the surface perpendicular to the longitudinal direction of the second busbar) is increased, reducing the electrical resistance of the second busbar and providing advantages such as reduced power loss and reduced heat generation.

[0017] According to the fifth technology, the second busbar can be placed on the surface of the portion of the protrusion that extends toward the end of the second busbar (the portion that extends perpendicular to the direction of the protrusion). As a result, the second busbar can be stably held on the protrusion. Furthermore, the portion of the protrusion that extends away from the surface of the case after extending toward the end of the second busbar allows for the positioning of the second busbar relative to the electrical junction box (protrusion), and prevents the second busbar from falling off the protrusion. In addition, the fifth technology makes it possible to obtain the advantages of stable holding of the second busbar on the protrusion, positioning of the second busbar relative to the electrical junction box, and prevention of the second busbar falling off the protrusion without performing any special processing on the second busbar, as described above, by devising the shape of the protrusion.

[0018] According to the sixth technology, the first busbar can extend upward through a notch or through-hole in the second busbar. In other words, when viewed from above, the second busbar can overlap with the first busbar in all positions except where the first busbar extends upward. As a result, the surface area of ​​the case for arranging the busbars (first and second busbars) can be reduced. That is, the size of the case in the planar direction can be further reduced.

[0019] According to the seventh technique, the first bus bar can be arranged at a position (the end of the protruding portion for the first bus bar) away from the surface of the case (the starting point where the protruding portion and the protruding portion for the first bus bar extend). As a result, the creepage distance between the first bus bar and the second bus bar can be further ensured to be longer.

Brief Description of the Drawings

[0020] [Figure 1] Shows a perspective view of the electrical connection box. [Figure 2] Shows a plan view of the electrical connection box. [Figure 3] Shows a cross-sectional view taken along III-III of FIG. 2. [Figure 4] Shows a cross-sectional view taken along IV-IV of FIG. 2. [Figure 5] Shows a cross-sectional view taken along V-V of FIG. 2. [Figure 6] Shows a cross-sectional view of the rib portion side of the electrical connection box of the first modification. [Figure 7] Shows a cross-sectional view of the middle portion of the electrical connection box of the first modification. [Figure 8] Shows a cross-sectional view of the power supply side of the electrical connection box of the first modification. [Figure 9] Shows a cross-sectional view of the rib portion side of the electrical connection box of the second modification. [Figure 10] Shows a cross-sectional view of the middle portion of the electrical connection box of the second modification. [Figure 11] Shows a cross-sectional view of the power supply side of the electrical connection box of the second modification. [Figure 12] Shows a cross-sectional view of the power supply side of the electrical connection box of the third modification. [Figure 13] Shows a cross-sectional view of the power supply side of the electrical connection box of the fourth modification. [Figure 14] Shows a cross-sectional view of the rib portion side of the electrical connection box of the fifth modification. [Figure 15] Shows a cross-sectional view of the middle portion of the electrical connection box of the fifth modification. [Figure 16] Shows a cross-sectional view of the power supply side of the electrical connection box of the fifth modification. [Figure 17] Shows a cross-sectional view of the power supply side of the electrical connection box of the sixth modification. [Figure 18] The seventh modified example shows a cross-sectional view of the power supply side of the electrical junction box. [Modes for carrying out the invention]

[0021] (Features of the electrical junction box 100) The electrical junction box 100 will be described with reference to Figures 1 to 5. Figure 1 shows the electrical junction box 100 with electronic components 20 and 40 connected. Figure 2 shows the electrical junction box 100 as viewed from above (Z+ side) (i.e., a plan view).

[0022] As shown in Figures 1 and 2, the electrical junction box 100 comprises a case 10, a first busbar 25, a second busbar 26, a third busbar 45, and a fourth busbar 46. As shown in Figure 1, the first electronic component 20 is connected to the first busbar 25 and the second busbar 26. The second electronic component 40 is connected to the third busbar 45 and the fourth busbar 46. The case 10 is provided with first protrusions 12a and 12b that protrude from the surface of the case 10, and second protrusions 14a and 14b that protrude from the surface of the case 10 at a distance from the first protrusions 12a and 12b. The first protrusions 12a and 12b extend on the surface of the case 10 in a second direction (Y direction) perpendicular to the first direction, with a gap in the first direction (X direction). The second protrusions 14a and 14b also extend from the surface of the case 10 in a second direction (Y direction) perpendicular to the first direction, with a gap in the first direction (X direction). Furthermore, a first busbar protrusion 13 is provided between the first protrusions 12a and 12b, protruding from the surface of the case 10. Similarly, a second busbar protrusion 15 is provided between the second protrusions 14a and 14b, protruding from the surface of the case 10. The protrusions 12a, 12b, 14a, 14b, 13, and 15 are formed of an insulator.

[0023] The first busbar 25 comprises a main busbar portion 25a and a rib portion 25b. The main busbar portion 25a is positioned between the first protrusions 12a and 12b on a plane parallel to the surface of the case 10 (on the XY plane). That is, the first busbar 25 (main busbar portion 25a) is positioned in the region sandwiched between the first protrusions 12a and 12b. The rib portion 25b extends from the surface of the main busbar portion 25a in a direction perpendicular to the surface of the case 10 (Z+ direction). The first busbar terminal 23 is connected to the end of the rib portion 25b. As will be described in detail later, the main busbar portion 25a does not directly contact the surface of the case 10.

[0024] The second busbar 26 comprises a main busbar portion 26a and a rib portion 26b. The main busbar portion 26a is positioned on the ends of the first protrusions 12a and 12b. The main busbar portion 26a is also positioned on the XY plane. That is, the second busbar 26 (main busbar portion 26a) is located above the first busbar 25 (main busbar portion 25a). The rib portion 26b extends from the surface of the main busbar portion 26a in the Z+ direction. The end of the rib portion 26b is connected to the second busbar terminal 24. The second busbar 26 (main busbar portion 26a) is provided with a notch 27. The rib portion 25b of the first busbar 25 extends through the notch 27 to a position above the main busbar portion 26a of the second busbar 26. The notch 27 maintains a gap between the rib portion 25b of the first busbar 25 and the second busbar 26 (main busbar portion 26a).

[0025] The connection terminal 21 of the first electronic component 20 is connected to the first busbar terminal 23. The connection terminal 22 of the first electronic component 20 is connected to the second busbar terminal 24. The first busbar 25 and the second busbar 26 are connected to an external power supply (not shown) which supplies power to the first electronic component 20.

[0026] The third busbar 45 comprises a main busbar portion 45a and a rib portion 45b. The main busbar portion 45a is positioned between the second protrusions 14a and 14b on a plane parallel to the surface of the case 10 (on the XY plane). That is, the third busbar 45 (main busbar portion 45a) is positioned in the region sandwiched between the second protrusions 14a and 14b. The rib portion 45b extends from the surface of the main busbar portion 45a in a direction perpendicular to the surface of the case 10 (Z+ direction). The end of the rib portion 45b is connected to the third busbar terminal 43.

[0027] The fourth busbar 46 comprises a main busbar portion 46a and a rib portion 46b. The main busbar portion 46a is positioned on the ends of the second protrusions 14a and 14b. The main busbar portion 46a is also positioned on the XY plane. That is, the fourth busbar 46 (main busbar portion 46a) is located above the third busbar 45 (main busbar portion 45a). The rib portion 46b extends from the surface of the main busbar portion 46a in the Z+ direction. The fourth busbar terminal 44 is connected to the end of the rib portion 46b. The fourth busbar 46 (main busbar portion 46a) is provided with a notch 47. The rib portion 45b of the third busbar 45 extends through the notch 47 to a position above the main busbar portion 46a of the fourth busbar 46. The notch 47 maintains a gap between the rib portion 45b of the third busbar 45 and the fourth busbar 46 (main busbar portion 46a).

[0028] The connection terminal 41 of the second electronic component 40 is connected to the third busbar terminal 43. The connection terminal 42 of the second electronic component 40 is connected to the fourth busbar terminal 44. The third busbar 45 and the fourth busbar 46 are connected to an external power supply (not shown) and supply power to the second electronic component 40.

[0029] The features of the electrical junction box 100 will be explained in more detail below with reference to Figures 3 to 5. As mentioned above, the features of the first busbar 25 are the same as those of the third busbar 45, and the features of the second busbar 26 are the same as those of the fourth busbar 46. Furthermore, the relationship between the first electronic component 20, the first busbar 25, and the second busbar 26 is the same as the relationship between the second electronic component 40, the third busbar 45, and the fourth busbar 46. Therefore, the following explanation will focus on the relationship between the first busbar 25 and the second busbar 26.

[0030] As shown in Figure 3, the first busbar 25 (main busbar portion 25a) is positioned at the end of the first busbar projection 13. The height (length in the Z direction) of the first busbar projection 13 is lower than the height of the first projections 12a and 12b. A through hole 25h is provided in the main busbar portion 25a of the first busbar 25. Furthermore, a positioning projection 13a is provided at the upper end of the first busbar projection 13. When placing the first busbar 25 in the case 10, the positioning projection 13a is inserted into the through hole 25h, and the first busbar 25 is placed on the first busbar projection 13. This allows the first busbar 25 to be positioned relative to the case 10. Furthermore, in the direction in which the main busbar portion 25a extends (Y direction), the positioning projection 13a and the through hole 25h are provided on the side of the main busbar portion 25a where the rib portion 25b is formed (rib portion side) (see comparison of Figures 4 and 5). Projections 25c extending toward the surface of the case 10 are provided at both ends of the main busbar portion 25a in the width direction (X direction). The projections 25c are provided along the entire direction in which the main busbar portion 25a extends (see also Figures 4 and 5). The projections 25c extend along the first projections 12a and 12b. By providing the projections 25c, the cross-sectional area of ​​the first busbar 25 (cross-sectional area of ​​the XZ plane) is increased, and the electrical resistance of the first busbar 25 can be reduced. Furthermore, even if vibrations or other forces are applied to the first busbar 25, the protrusion 25c contacts the first protrusions 12a and 12b, thereby suppressing displacement (such as falling) of the first busbar 25.

[0031] As shown in Figures 3 to 5, the main busbar portion 26a of the second busbar 26 is positioned at the upper end of the first protrusions 12a and 12b. As described above, the height of the protrusion 13 for the first busbar is lower than the height of the first protrusions 12a and 12b. Therefore, a gap is secured between the main busbar portion 25a of the first busbar 25 and the main busbar portion 26a of the second busbar 26. Also, as shown in Figures 3 and 4, a notch 47 is provided in the main busbar portion 26a. The notch 47 is provided in the first busbar 25 (rib portion 25b). By providing the notch 47, a space is secured for the rib portion 25b of the first busbar 25 to extend upward. In other words, by providing the notch 47, a gap is maintained between the rib portion 25b of the first busbar 25 and the second busbar 26, preventing the first busbar 25 and the second busbar 26 from coming into contact. The notch 47 is provided on the side of the main busbar portion 26a where the rib portion 26b is formed (the rib portion side) (see also Figure 2). In other words, the notch 47 is not provided on the side of the main busbar portion 26a that connects to the power supply (not shown) (the power supply side). This allows for a larger cross-sectional area (cross-sectional area of ​​the XZ plane) of the second busbar 26 (main busbar portion 26a), and reduces the electrical resistance of the second busbar 26.

[0032] (Advantages of electrical junction box 100) When viewed from above (from the Z+ direction), the main busbar portion 25a of the first busbar 25 and the main busbar portion 26a of the second busbar 26 overlap in the electrical junction box 100. Therefore, the widthwise size of the electrical junction box (case) can be reduced compared to an electronic junction box in which the two busbars are arranged side by side in the widthwise direction (X direction). Furthermore, by positioning the first busbar 25 (main busbar portion 25a) at the end of the projection 13 for the first busbar, the creepage distance between the first busbar 25 and the second busbar 26 can be increased. In addition, as described above, by providing the positioning projection 13a and the through hole 25h, the positioning of the first busbar 25 becomes easier, and the assembly work of the electrical junction box 100 can be simplified. Furthermore, by providing the projection 25c that faces downward (towards the surface side of the case 10), the electrical resistance of the first busbar 25 can be reduced. This prevents the first busbar 25 from falling off the protrusion 13 for the first busbar.

[0033] Furthermore, since the second busbar 26 (main busbar portion 26a) is positioned at the upper ends of the first protrusions 12a and 12b, the second busbar 26 is supported from both sides, preventing it from falling from the first protrusions 12a and 12b. In addition, by providing a notch 47 in a part of the main busbar portion 26a, the electrical resistance of the second busbar 26 can be reduced while maintaining a gap between the first busbar 25 and the second busbar 26.

[0034] (A modified example of the electrical junction box 100) The following describes modified versions of the electrical junction box 100 (electrical junction boxes 100a to 100h). Note that for electrical junction boxes 100a to 100h, features common to electrical junction box 100 may be omitted from the explanation by assigning them the same reference number as electrical junction box 100.

[0035] (First variation) Figures 6 to 8 show cross-sectional views of the electrical junction box 100a. Figures 6, 7, and 8 correspond to the cross-sections at the positions shown in Figures 3, 4, and 5, respectively. Compared to the electrical junction box 100, the electrical junction box 100a does not have a protruding portion 25c on the main busbar portion 25a. Therefore, the structure of the first busbar 25 in the electrical junction box 100a is simplified, making it easier to manufacture the first busbar 25.

[0036] (Second variation) Figures 9 to 11 show cross-sectional views of the electrical junction box 100b. Figures 9, 10, and 11 correspond to the cross-sections at the positions shown in Figures 3, 4, and 5, respectively. The electrical junction box 100b has through holes 147 in the second busbar 26 (main busbar portion 26a). The through holes 147 are provided only on the rib portion side (Figure 9), and not on the power supply side (Figure 11) or in the intermediate portion between the rib portion side and the power supply side (Figure 10). By providing the through holes 147, the electrical junction box 100b can maintain a gap between the rib portion 25b of the first busbar 25 and the second busbar 26, similar to the electrical junction box 100. Furthermore, it is possible to prevent the first busbar 25 and the second busbar 26 from sagging and coming into contact. In addition, in the electrical junction box 100b, the main busbar portion 26a is supported by both sides over its entire length from the rib portion side to the power supply side. Therefore, the electrical junction box 100b can more stably hold the second busbar 26 on the first protrusions 12a, 12b. In addition, in the electrical junction box 100b, a main busbar section 25a without a protrusion 25c can also be used, similar to the electrical junction box 100a.

[0037] (Third variation) Figure 12 shows a cross-sectional view of the power supply side (corresponding to the position shown in Figure 5) of the electrical junction box 100c. The electrical junction box 100c is provided with protrusions 30 extending toward the surface of the case 10 on both sides in the width direction of the main busbar section 26a. The protrusions 30 are provided on the outside of the first protrusions 12a and 12b in the width direction. That is, the protrusions 30 are provided on the width direction end side of the main busbar section 26a, beyond the portion where the end faces (upper end faces) of the first protrusions 12a and 12b contact the main busbar section 26a. By providing the protrusions 30, the electrical junction box 100c can prevent the second busbar 26 from falling from the first protrusions 12a and 12b. In addition, because the protrusions 30 are provided, the cross-sectional area of ​​the main busbar section 26a of the electrical junction box 100c can be made larger than that of the electrical junction boxes 100, 100a, and 100b, and the electrical resistance of the second busbar 26 can be reduced. In addition, in the electrical junction box 100b, a main busbar section 25a without a protruding portion 25c can be used, similar to the electrical junction box 100a. Furthermore, in the electrical junction box 100c, the structure of the power supply side and the intermediate section can be any of the forms of electrical junction box 100 (see Figures 3 and 4), electrical junction box 100a (see Figures 6 and 7), or electrical junction box 100b (see Figures 9 and 10).

[0038] (Fourth variation) Figure 13 shows a cross-sectional view of the power supply side (corresponding to the position shown in Figure 5) of the electrical junction box 100d. The electrical junction box 100d has a recess 32 on the back side of the main busbar section 26a (the side facing the front surface of the case 10). The recess 32 is provided on both ends of the main busbar section 26a in the width direction. The first protrusions 12a and 12b are housed in the recess 32. That is, in the width direction, the distance between the first protrusions 12a and 12b is equal to the distance between the recesses 32 and 32. By housing the first protrusions 12a and 12b in the recess 32, the electrical junction box 100d can prevent the second busbar 26 from falling from the first protrusions 12a and 12b. Furthermore, the electrical junction box 100d can also be positioned relative to the first protrusions 12a and 12b (case 10) by inserting the first protrusions 12a and 12b into the recesses 32. In addition, the electrical junction box 100d can also use a main busbar section 25a without a protrusion 25c, similar to the electrical junction box 100a. Moreover, the structure of the power supply side and the intermediate section of the electrical junction box 100d can be any of the forms of the electrical junction box 100 (see Figures 3 and 4), the electrical junction box 100a (see Figures 6 and 7), or the electrical junction box 100b (see Figures 9 and 10).

[0039] (Fifth variation) Figures 14 to 16 show cross-sectional views of the electrical junction box 100e. Figures 14, 15, and 16 correspond to the cross-sections at the positions shown in Figures 3, 4, and 5, respectively. Compared to the electrical junction box 100, the electrical junction box 100e does not have a protrusion 13 for the first busbar on the case 10. In the electrical junction box 100e, the first busbar 25 (main busbar portion 25a) is positioned on the surface of the case 10. The electrical junction box 100e allows for a simplified shape of the case 10 and eliminates the need for countermeasures against the first busbar 25 falling. In addition, in the electrical junction box 100e, a through hole 147 may be provided in the second busbar 26 (main busbar portion 26a), similar to the electrical junction box 100b. Furthermore, similar to the electrical junction box 100c, a protrusion 30 may be provided on the main busbar portion 26a of the second busbar 26, or similar to the electrical junction box 100d, a recess 32 may be provided on the main busbar portion 26a of the second busbar 26.

[0040] (Sixth variation) The electrical junction box 100f shown in Figure 17 is a modified example of the electrical junction box 100e, and shows a cross-sectional view of the power supply side (corresponding to the position shown in Figure 16). The electrical junction box 100f has a bent portion 34a at the end of the first protrusion 12a, and a bent portion 34b at the end of the first protrusion 12b. The bent portions 34a and 34b are L-shaped and extend outward (towards the main busbar portion 26a) from the point where the first protrusions 12a and 12b contact the second busbar 26 (main busbar portion 26a), and then bend upward (away from the surface of the case 10). In the electrical junction box 100e, the second busbar 26 (main busbar portion 26a) is placed on the portion where the bent portions 34a and 34b extend outward (in the X direction). Therefore, the second busbar 26 can be stably held on the first protrusions 12a and 12b. Furthermore, the bent portions 34a and 34b extend above the thickness of the main busbar portion 26a. Therefore, it is possible to more reliably prevent the second busbar 26 from falling from the first protrusions 12a and 12b. In addition, in the electrical junction box 100f, the protrusion 13 for the first busbar may be provided on the surface of the case 10, similar to the electrical junction boxes 100, 100a, 100b, 100c and 100d. And in the case where the protrusion 13 for the first busbar is provided on the surface of the case 10 in the electrical junction box 100f, the protrusion 25c may be provided on the main busbar portion 25a, similar to the electrical junction boxes 100, 100b, 100c and 100d.

[0041] (Seventh variation) The electrical junction box 100g shown in Figure 18 is a modified example of the electrical junction box 100e, and shows a cross-sectional view of the power supply side (corresponding to the position shown in Figure 16). In the electrical junction box 100g, the second busbar 26 (main busbar portion 26a) is positioned on the first protrusion 12b and does not contact the first protrusion 12b. That is, the main busbar portion 26a is cantilevered. Even in this case, by positioning the second busbar 26 (main busbar portion 26a) on the first protrusion 12b, a gap can be secured between the first busbar 25 and the second busbar 26, and the first busbar 25 and the second busbar 26 can be overlapped when viewed from above. The electrical junction box 100g allows for simplification of the shapes of the first busbar 25, the second busbar 26 and the case 10, and the manufacturing cost of each component can be reduced. In addition, in the electrical junction box 100g, the first protrusion 12a, on which the second busbar 26 (main busbar portion 26a) is not located, can be removed.

[0042] (Other embodiments) In the above embodiment, an electrical junction box was described in which, when viewed from above, the first and second busbars to which the first electronic component is connected overlap, and the third and fourth busbars to which the second electronic component is connected also overlap. However, different electronic components may be connected to the first and second busbars (or the third and fourth busbars). For example, two connection terminals of the first electronic component may be connected to the second and third busbars, one of the two connection terminals of the second electronic component may be connected to the fourth busbar, and one of the two connection terminals of the third electronic component may be connected to the first busbar. Importantly in the electrical junction box disclosed herein, insulating protrusions are formed on the surface of the case.

[0043] Although embodiments of the present invention have been described in detail above, these are merely illustrative and do not limit the scope of the claims. The technologies described in the claims include various modifications and changes to the specific examples illustrated above. Furthermore, the technical elements described in this specification or drawings exhibit technical usefulness individually or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technologies illustrated in this specification or drawings achieve multiple objectives simultaneously, and achieving even one of these objectives constitutes technical usefulness in itself. [Explanation of Symbols]

[0044] 10: Case 12a, 12b: First protrusion 25: First bus bar 26: Second bus bar 100: Electrical junction box

Claims

1. The case and, A protruding portion that protrudes from the surface of the aforementioned case and is made of an insulator, A first busbar is disposed on the surface of the case, A second busbar is positioned at the end of the protruding portion and is located above the first busbar at a distance from the first busbar, An electrical junction box equipped with this feature.

2. An electrical junction box according to claim 1, Multiple of the aforementioned protrusions are provided on the case at intervals, The first busbar is positioned in a region sandwiched by a plurality of the aforementioned protrusions, The second busbar is an electrical connection box located at each end of the plurality of protrusions.

3. An electrical junction box according to claim 1 or 2, The second busbar has a recess for accommodating the end of the protruding portion, in an electrical junction box.

4. An electrical junction box according to claim 1 or 2, The second busbar has a protrusion extending toward the surface of the case, The aforementioned protrusion is provided on the end side of the second busbar, beyond the portion where the end face of the protrusion contacts the second busbar, in an electrical connection box.

5. An electrical junction box according to claim 1 or 2, An electrical junction box, wherein the end of the protruding portion is provided with a bent portion that extends from the portion where the end face of the protruding portion and the second busbar come into contact toward the end of the second busbar, and then bends so as to extend toward a direction away from the surface of the case.

6. An electrical junction box according to claim 1 or 2, An electrical junction box wherein the second busbar has a notch or through hole for maintaining a gap with the portion of the first busbar that extends upward.

7. An electrical junction box according to claim 1 or 2, An electrical connection box having a projection for a first busbar that protrudes from the surface of the case, is made of an insulator, and has the first busbar positioned at its end.

Images