Electrical junction box

Abstract

This electrical connection box (10) is provided with a housing (20) and a bus bar (30) attached to the housing (20), the housing (20) being provided with a common fuse mounting part (21) on which at least two fuses including a large fuse (41) and a small fuse (42) having different sizes are mounted, and the fuse mounting part (21) being provided with: a large input-side fixing part (23) for fixing the large input-side fixing part (23) to the small input-side fixing part (23), and a small input-side fixing part (23) for fixing the small input-side fixing part (23) to the small input-side fixing part (23); a large input terminal (41B) of the large fuse (41) is fixed; a large output side fixing part (24) for fixing a large output terminal (41C) of the large fuse (41); a small input side fixing part (25) for fixing a small input terminal (42B) of the small fuse (42); and a small output-side fixing part (26) for fixing a small output terminal (42C) of the small fuse (42), the small input-side fixing part (25) and the small output-side fixing part (26) being disposed between the large input-side fixing part (23) and the large output-side fixing part (24).

Description

Technical Field

[0001] The present disclosure relates to an electrical connection box. Background Art

[0002] Conventionally, as an electrical connection box equipped with a fusible link, there is known an electrical connection box described in Japanese Patent Application Laid-Open No. 2005-185002 (hereinafter referred to as Patent Document 1). The electrical connection box includes a lower housing and an upper housing that is assembled to cover the upper surface side of the lower housing. An input side LA terminal connection portion, an output side LA terminal connection portion, a first fuse mounting portion adjacent to the LA terminal connection portion, a second fuse mounting portion, a plurality of relay accommodating portions, and a fuse accommodating portion are provided on the upper surface of the lower housing.

[0003] The fusible link mounted on the first fuse mounting portion includes: a main body; an input terminal portion protruding laterally from a lower end of one side of the main body; and an output terminal portion protruding from a lower end of the other side of the main body in a direction opposite to the input terminal portion. The fusible link and the first fuse mounting portion are fixed by passing a bolt through a bolt hole of the first fuse mounting portion and a bolt hole of the input terminal portion of the fusible link and fastening the bolt to a nut.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2005-185002 Summary of the invention

[0007] Problems to be solved by the invention

[0008] Generally, the size of the fusible link to be mounted may vary depending on the vehicle type and grade. Therefore, in the conventional electrical connection box, it is necessary to design a dedicated electrical connection box to match the fusible link of each size, which lacks versatility and increases the cost.

[0009] Means for solving problems

[0010] The electrical connection box disclosed in the present invention comprises a shell and a bus bar installed on the shell, wherein the shell comprises a common fuse-carrying portion, the fuse-carrying portion respectively carries at least two fuses including a large fuse and a small fuse of different sizes, and the fuse-carrying portion comprises: a large input side fixing portion for fixing a large input terminal arranged on one end side of the large fuse; a large output side fixing portion for fixing a large output terminal arranged on the other end side of the large fuse; a small input side fixing portion for fixing a small input terminal arranged on one end side of the small fuse; and a small output side fixing portion for fixing a small output terminal arranged on the other end side of the small fuse, and the small input side fixing portion and the small output side fixing portion are arranged between the large input side fixing portion and the large output side fixing portion.

[0011] Effects of the Invention

[0012] According to the present disclosure, at least two fuses having different sizes can be mounted in the same electrical connection box, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] [ Figure 1 ] Figure 1 This is a plan view of an electrical connection box equipped with a large fuse.

[0014] [ Figure 2 ] Figure 2 This is a plan view of an electrical connection box equipped with a small fuse.

[0015] [ Figure 3 ] Figure 3 This is a partially enlarged plan view of the electrical connection box, showing an enlarged view of a fuse mounting portion on which a large fuse is mounted.

[0016] [ Figure 4 ] Figure 4 yes Figure 3 AA section view.

[0017] [ Figure 5 ] Figure 5 This is a partially enlarged rear view of the electrical connection box, showing an enlarged view of a fuse mounting portion on which a large fuse is mounted.

[0018] [ Figure 6 ] Figure 6 yes Figure 5 BB cross-sectional view.

[0019] [ Figure 7 ] Figure 7 This is a partially enlarged plan view of the electrical connection box showing an enlarged view of a fuse mounting portion on which a small fuse is mounted.

[0020] [ Figure 8 ] Figure 8 yes Figure 7 CC cross-sectional view. DETAILED DESCRIPTION

[0021] [Description of Embodiments of the Present Disclosure]

[0022] First, embodiments of the present disclosure will be described below.

[0023] (1) The electrical connection box disclosed in the present invention comprises a shell and a bus bar mounted on the shell, wherein the shell comprises a common fuse mounting portion, the common fuse mounting portion respectively mounting at least two fuses including a large fuse and a small fuse of different sizes, the fuse mounting portion comprising: a large input side fixing portion for fixing a large input terminal provided on one end side of the large fuse; a large output side fixing portion for fixing a large output terminal provided on the other end side of the large fuse; a small input side fixing portion for fixing a small input terminal provided on one end side of the small fuse; and a small output side fixing portion for fixing a small output terminal provided on the other end side of the small fuse, the small input side fixing portion and the small output side fixing portion being arranged between the large input side fixing portion and the large output side fixing portion.

[0024] In order to mount a large fuse on the fuse mounting portion, the large input terminal is fixed to the large input side fixing portion, and the large output terminal is fixed to the large output side fixing portion. In order to mount a small fuse on the fuse mounting portion, the small input terminal is fixed to the small input side fixing portion, and the small output terminal is fixed to the small output side fixing portion. Since a large fuse and a small fuse can be mounted on one fuse mounting portion in this way, at least two fuses of different sizes can be mounted in the same electrical connection box, which can suppress costs.

[0025] (2) Preferably, the bus bar comprises: an input side bus bar having a large input side connection portion and a small input side connection portion, the large input side connection portion being fixed to the large input side fixing portion in a state of being connected to the large input terminal, and the small input side connection portion being fixed to the small input side fixing portion in a state of being connected to the small input terminal; and an output side bus bar having a large output side connection portion and a small output side connection portion, the large output side connection portion being fixed to the large output side fixing portion in a state of being connected to the large output terminal, and the small output side connection portion being fixed to the small output side fixing portion in a state of being connected to the small output terminal.

[0026] In order to connect the large fuse to the input side bus bar, the large input side connection part is fixed to the large input side fixing part together with the large input terminal. In order to connect the large fuse to the output side bus bar, the large output side connection part is fixed to the large output side fixing part together with the large output terminal. In order to connect the small fuse to the input side bus bar, the small input side connection part is fixed to the small input side fixing part together with the small input terminal. In order to connect the small fuse to the output side bus bar, the small output side connection part is fixed to the small output side fixing part together with the small output terminal. In this way, it is possible to select either the large fuse or the small fuse to connect the input side bus bar to the output side bus bar, so that the same electrical connection box can be used to cope with different vehicle models and grades.

[0027] (3) Preferably, the large input side connection portion and the small input side connection portion are arranged at different height positions in a height direction orthogonal to the arrangement direction when viewed from above, the input side bus bar has an input side step, and the input side step connects the large input side connection portion and the small input side connection portion in a step shape, and the large output side connection portion and the small output side connection portion are arranged at different height positions in a height direction orthogonal to the arrangement direction when viewed from above, and the output side bus bar has an output side step, and the output side step connects the large output side connection portion and the small output side connection portion in a step shape.

[0028] The input-side bus bar is formed into a step shape by the input-side step, and the output-side bus bar is formed into a step shape by the output-side step. Therefore, when a large fuse is mounted on the fuse mounting portion, interference with the bus bar is unlikely.

[0029] (4) Preferably, the shell further comprises a pair of fuse protection walls, the pair of fuse protection walls being arranged on both sides of the fuse mounting portion, and the pair of fuse protection walls being able to be arranged at an outer position covering the large fuse from both sides and at an inner position located closer to the inner side than the outer position and covering the small fuse from both sides.

[0030] The large fuse is protected by a pair of fuse protection walls located at the outer position, and the small fuse is protected by a pair of protection walls located at the inner position.

[0031] (5) Preferably, the pair of fuse protection walls are movable in a width direction perpendicular to the axial direction and the height direction, and are interlocked via gears.

[0032] When one fuse protection wall is moved, the other fuse protection wall can be moved via the gear.

[0033] [Details of the embodiments of the present disclosure]

[0034] Hereinafter, specific examples of the connector of the present disclosure will be described with reference to the drawings. In addition, the present disclosure is not limited to these examples, but is indicated by the scope of claims, and is intended to include all changes within the meaning and scope equivalent to the scope of claims.

[0035] <Implementation Method>

[0036] Reference Figures 1 to 8 An embodiment of the present disclosure will be described. An electrical junction box 10 of the present embodiment is mounted on a vehicle such as an electric vehicle or a hybrid vehicle, and is disposed on a power supply line from a power source such as a battery to a load such as auxiliary equipment.

[0037] [Overall structure of the electrical connection box]

[0038] like Figure 1 As shown, the electrical connection box 10 includes a housing 20, a bus bar 30, a first fuse 40 and a second fuse 50. The first fuse 40 is Figure 1 The second fuse 50 is located on the upper side of the housing 20 as shown in the figure. Figure 1 The first fuse 40 is located on the lower side of the diagram.

[0039] The case 20 is made of synthetic resin and includes a lower case to which the bus bar 30 etc. is fixed and a cover (not shown) assembled to the lower case from above and covering the bus bar 30 etc. In the present embodiment, only the lower case is disclosed.

[0040] The bus bar 30 is a component formed by punching and bending a metal plate, and includes a first bus bar 31, a second bus bar 32, and a third bus bar 33. The first bus bar 31 is formed at Figure 1 The second bus bar 32 and the third bus bar 33 are located on the right side of the housing 20. Figure 1 The second bus bar 32 is located on the left side of the first bus bar 31. Figure 1 The center is located on the upper side of the third bus bar 33 in the figure.

[0041] The first bus bar 31 has an external connection portion 31A to which a power supply side cable is connected. The power input from the external connection portion 31A to the first bus bar 31 is branched and supplied to the first fuse 40 and the second fuse 50. The first bus bar 31 has a first fuse connection portion 31B connected to the first fuse 40 and a second fuse connection portion 31C connected to the second fuse 50.

[0042] The second bus bar 32 includes a first fuse connection portion 32A connected to the first fuse 40, and the third bus bar 33 includes a second fuse connection portion 33A connected to the second fuse 50. The first fuse connection portion 32A is connected to one load-side cable, and the second fuse connection portion 33A is connected to the other load-side cable. Therefore, after the power input from the power supply side cable is branched at the first bus bar 31, it is output to one load-side cable through the first fuse 40 and the second bus bar 32, and is output to the other load-side cable through the second fuse 50 and the third bus bar 33.

[0043] [case]

[0044] The housing 20 includes a first fuse mounting portion 21 on which the first fuse 40 is mounted, and a second fuse mounting portion 22 on which the second fuse 50 is mounted. Hereinafter, the first fuse mounting portion 21 will be described and will be referred to as the fuse mounting portion 21 for short.

[0045] The fuse mounting portion 21 is provided with fuses of different sizes. Figure 1The large fuse 41 shown and Figure 2 The small fuse 42 shown in the figure shares the common fuse mounting portion 21. The first fuse 40 is a general term for the large fuse 41 and the small fuse 42.

[0046] [Big Fuse]

[0047] like Figure 4 As shown, the large fuse 41 includes a large fuse body 41A, a large input terminal 41B protruding from one end of the large fuse body 41A, and a large output terminal 41C protruding from the other end of the large fuse body 41A. The large fuse body 41A is substantially cylindrical and is formed to extend along an axis P1 passing through its center. The large input terminal 41B and the large output terminal 41C are both formed to be flat and extend along the axis P1. The large input terminal 41B and the large output terminal 41C each have a bolt hole 41D.

[0048] [Small fuse]

[0049] like Figure 8 As shown, the small fuse 42 includes a small fuse body 42A, a small input terminal 42B that protrudes downward from the lower surface of one end side of the small fuse body 42A and then protrudes to the right side of the figure, and a small output terminal 42C that protrudes downward from the lower surface of the other end side of the small fuse body 42A and then protrudes to the left side of the figure. The small fuse body 42A is formed into a substantially cylindrical shape and extends in the direction of the axis P2. The small input terminal 42B and the small output terminal 42C are both formed into a flat plate shape and extend along the axis P2. The small input terminal 42B and the small output terminal 42C both have a bolt hole 42D.

[0050] The dimension of the large fuse body 41A in the direction of the axis P1 is larger than the dimension of the small fuse body 42A in the direction of the axis P2. In addition, the diameter dimension of the large fuse body 41A is larger than the diameter dimension of the small fuse body 42A. The plate thickness of the large input terminal 41B and the large output terminal 41C is larger than the plate thickness of the small input terminal 42B and the small output terminal 42C.

[0051] [Fuse mounting section]

[0052] The fuse mounting portion 21 includes a large input side fixing portion 23 for fixing the large input terminal 41B, a large output side fixing portion 24 for fixing the large output terminal 41C, a small input side fixing portion 25 for fixing the small input terminal 42B, and a small output side fixing portion 26 for fixing the small output terminal 42C. The small input side fixing portion 25 and the small output side fixing portion 26 are arranged between the large input side fixing portion 23 and the large output side fixing portion 24.

[0053] The portion of the fuse mounting portion 21 where the small input side fixing portion 25 and the small output side fixing portion 26 are formed is formed as a recessed portion 27 that is recessed downward from the portion where the large input side fixing portion 23 and the large output side fixing portion 24 are formed. Figure 4 As shown in FIG. 2 , the lower half of the large fuse body 41A is accommodated in the recess 27. Figure 8 As shown, the entire small fuse 42 is accommodated in the recess 27 .

[0054] like Figure 4 As shown, the large input side fixing part 23 is configured to include: a nut N; a nut receiving part 23A, which receives the nut N so that it cannot rotate; and a bolt avoidance part 23B, which avoids the shaft of the large bolt B1. The large output side fixing part 24, the small input side fixing part 25 and the small output side fixing part 26 have the same structure as the large input side fixing part 23.

[0055] The large output side fixing part 24 is composed of a nut N, a nut accommodating part 24A and a bolt avoidance part 24B, the small input side fixing part 25 is composed of a nut N, a nut accommodating part 25A and a bolt avoidance part 25B, and the small output side fixing part 26 is composed of a nut N, a nut accommodating part 26A and a bolt avoidance part 26B.

[0056] [Connection structure of large fuse]

[0057] The first fuse connection portion 31B of the first bus bar 31 is formed along the outer surface of the large fuse 41. The first fuse connection portion 31B includes: a large input side connection portion 34A, which is fixed to the large input side fixing portion 23 in a state connected to the large input terminal 41B; a small input side connection portion 34B, which is fixed to the small input side fixing portion 25 in a state connected to the small input terminal 42B; and an input side step 34C, which connects the large input side connection portion 34A and the small input side connection portion 34B in a step shape. The large input side connection portion 34A is arranged at a higher position than the small input side connection portion 34B in the height direction orthogonal to the axis P1 and P2 directions. Both the large input side connection portion 34A and the small input side connection portion 34B have a bolt hole 34D.

[0058] The first fuse connection portion 32A of the second bus bar 32 has: a large output side connection portion 35A fixed to the large output side fixing portion 24 in a state connected to the large output terminal 41C; a small output side connection portion 35B fixed to the small output side fixing portion 26 in a state connected to the small output terminal 42C; and an output side step 35C connecting the large output side connection portion 35A and the small output side connection portion 35B in a step shape. The large output side connection portion 35A is arranged at a position higher than the small output side connection portion 35B in the height direction orthogonal to the axis P1 and P2 directions. Both the large output side connection portion 35A and the small output side connection portion 35B have a bolt hole 35D.

[0059] The dimension between the large input side fixing part 23 and the large output side fixing part 24 is larger than the dimension between the small input side fixing part 25 and the small output side fixing part 26. The large input side fixing part 23, the small input side fixing part 25, the small output side fixing part 26 and the large output side fixing part 24 are arranged in a row in a plan view. The arrangement direction of the large input side fixing part 23, the small input side fixing part 25, the small output side fixing part 26 and the large output side fixing part 24 in a plan view is consistent with the direction of the axes P1 and P2.

[0060] like Figure 4 As shown, the bolt hole 34D of the large input side connection part 34A and the nut N of the large input side fixing part 23 are arranged coaxially. When the large input terminal 41B is placed on the large input side connection part 34A, the bolt hole 34D of the large input side connection part 34A, the nut N of the large input side fixing part 23, and the bolt hole 41D of the large input terminal 41B are arranged coaxially. If the bolt B1 is inserted through the bolt holes 34D and 41D and fastened to the nut N, the large input terminal 41B and the large input side connection part 34A are clamped between the head of the bolt B1 and the nut N, so that the first fuse connection part 31B of the first bus bar 31 and the large input terminal 41B of the large fuse 41 are fixed to the large input side fixing part 23 in a state where they can be conductively connected.

[0061] The bolt hole 35D of the large output side connection part 35A is coaxially arranged with the nut N of the large output side fixing part 24. When the large output terminal 41C is placed on the large output side connection part 35A, the bolt hole 35D of the large output side connection part 35A, the nut N of the large output side fixing part 24, and the bolt hole 41D of the large output terminal 41C are coaxially arranged. If the bolt B1 is inserted through the bolt holes 35D and 41D and fastened to the nut N, the large output terminal 41C and the large output side connection part 35A are clamped between the head of the bolt B1 and the nut N, so that the first fuse connection part 32A of the second bus bar 32 and the large output terminal 41C of the large fuse 41 are fixed to the large output side fixing part 24 in a state where they can be conductively connected.

[0062] [Connection structure of small fuse]

[0063] like Figure 8As shown, the bolt hole 34D of the small input side connection part 34B and the nut N of the small input side fixing part 25 are arranged coaxially. When the small input terminal 42B is placed on the small input side connection part 34B, the bolt hole 34D of the small input side connection part 34B, the nut N of the small input side fixing part 25, and the bolt hole 42D of the small input terminal 42B are arranged coaxially. If a bolt B2 smaller than the bolt B1 is inserted through the bolt holes 34D and 42D and fastened to the nut N, the small input terminal 42B and the small input side connection part 34B are clamped between the head of the bolt B2 and the nut N, so that the first fuse connection part 31B of the first bus bar 31 and the small input terminal 42B of the small fuse 42 are fixed to the small input side fixing part 25 in a state where they can be conductively connected.

[0064] The bolt hole 35D of the small output side connection part 35B is coaxially arranged with the nut N of the small output side fixing part 26. When the small output terminal 42C is placed on the small output side connection part 35B, the bolt hole 35D of the small output side connection part 35B, the nut N of the small output side fixing part 26, and the bolt hole 42D of the small output terminal 42C are coaxially arranged. If the bolt B2 is inserted through the bolt holes 35D and 42D and fastened to the nut N, the small output terminal 42C and the small output side connection part 35B are clamped between the head of the bolt B2 and the nut N, so that the first fuse connection part 32A of the second bus bar 32 and the small output terminal 42C of the small fuse 42 are fixed to the small output side fixing part 26 in a state where they can be conductively connected.

[0065] [Fuse protection wall]

[0066] like Figure 1 As shown in FIG. 1 , the housing 20 includes a pair of fuse protection walls 28 disposed on both sides of the fuse mounting portion 21 in the width direction. Here, the width direction refers to a direction perpendicular to the axis P1 direction and the height direction. The pair of fuse protection walls 28 can be disposed Figure 1 The outer position shown and Figure 2 The pair of fuse protection walls 28 located at the inner position are located at a position further inward than the pair of fuse protection walls 28 located at the outer position. The pair of fuse protection walls 28 located at the outer position cover the large fuse 41 from both sides in the width direction, and the pair of fuse protection walls 28 located at the inner position cover the small fuse 42 from both sides in the width direction.

[0067] like Figure 4 As shown, the fuse protection wall 28 is formed to be larger than the large fuse 41 in the direction of the axis P1 and smaller than the recess 27. In addition, the fuse protection wall 28 is formed to be larger than the large fuse 41 in the height direction and larger than the recess 27. That is, although the upper half of the large fuse 41 protrudes from the recess 27, the protruding portion is covered by the pair of fuse protection walls 28 from both sides in the width direction.

[0068] like Figure 5 As shown, an inner rail 28A is provided at the lower end of the fuse protection wall 28. The inner rail 28A is formed to extend in the width direction in a configuration perpendicular to the fuse protection wall 28. On the other hand, an outer rail 20A into which the inner rail 28A can be inserted is provided at the lower end of the housing 20. The fuse protection wall 28 can move in the width direction between the outer position and the inner position by the inner rail 28A moving along the outer rail 20A.

[0069] The upper surface of the inner rail 28A is provided with a protrusion 28B. On the other hand, the inner surface of the outer rail 20A is provided with a pair of recesses at the outer and inner positions into which the protrusion 28B fits. The fuse protection wall 28 is positioned and held at the outer and inner positions by fitting the protrusion 28B of the inner rail 28A into the recess of the outer rail 20A.

[0070] like Figure 6 As shown, a pair of inner rails 28A are arranged to be point symmetrical with the gear 29 as the center. The inner rail 28A has teeth 28C that mesh with the gear 29. The gear 29 meshes with each tooth 28C at the same time in a form of being sandwiched by the pair of inner rails 28A. Therefore, the pair of fuse protection walls 28 can be linked via the gear 29. Therefore, when one of the fuse protection walls 28 is moved to one side in the width direction, the other fuse protection wall 28 is also moved to the other side in the width direction.

[0071] [Effects of the Embodiments]

[0072] The electrical connection box 10 disclosed in the present invention is an electrical connection box 10 including a housing 20 and a bus bar 30 mounted on the housing 20. The housing 20 includes a common fuse mounting portion 21 for mounting a large fuse 41 and a small fuse 42 of different sizes, respectively. The fuse mounting portion 21 includes: a large input side fixing portion 23 for fixing a large input terminal 41B provided at one end side of the large fuse 41; a large output side fixing portion 24 for fixing a large output terminal 41C provided at the other end side of the large fuse 41; a small input side fixing portion 25 for fixing a small input terminal 42B provided at one end side of the small fuse 42; and a small output side fixing portion 26 for fixing a small output terminal 42C provided at the other end side of the small fuse 42. The small input side fixing portion 25 and the small output side fixing portion 26 are arranged between the large input side fixing portion 23 and the large output side fixing portion 24.

[0073] In order to mount the large fuse 41 on the fuse mounting portion 21, the large input terminal 41B is fixed to the large input side fixing portion 23, and the large output terminal 41C is fixed to the large output side fixing portion 24. In order to mount the small fuse 42 on the fuse mounting portion 21, the small input terminal 42B is fixed to the small input side fixing portion 25, and the small output terminal 42C is fixed to the small output side fixing portion 26. Since the large fuse 41 and the small fuse 42 can be mounted on one fuse mounting portion 21 in this way, at least two fuses of different sizes can be mounted in the same electrical connection box 10, and the cost can be suppressed.

[0074] Preferably, the busbar 30 comprises: a first busbar 31, having a large input side connection portion 34A fixed to the large input side fixing portion 23 in a state of being connected to the large input terminal 41B, and a small input side connection portion 34B fixed to the small input side fixing portion 25 in a state of being connected to the small input terminal 42B; and a second busbar 32, having a large output side connection portion 35A fixed to the large output side fixing portion 24 in a state of being connected to the large output terminal 41C, and a small output side connection portion 35B fixed to the small output side fixing portion 26 in a state of being connected to the small output terminal 42C.

[0075] In order to connect the large fuse 41 to the first bus bar 31, the large input side connection part 34A is fixed to the large input side fixing part 23 together with the large input terminal 41B, and in order to connect the large fuse 41 to the second bus bar 32, the large output side connection part 35A is fixed to the large output side fixing part 24 together with the large output terminal 41C. In order to connect the small fuse 42 to the first bus bar 31, the small input side connection part 34B is fixed to the small input side fixing part 25 together with the small input terminal 42B, and in order to connect the small fuse 42 to the second bus bar 32, the small output side connection part 35B is fixed to the small output side fixing part 26 together with the small output terminal 42C. In this way, since it is possible to select either the large fuse 41 or the small fuse 42 to connect the first bus bar 31 to the second bus bar 32, it is possible to use the same electrical connection box 10 to cope with different vehicle models and grades.

[0076] Preferably, the large input side connection portion 34A and the small input side connection portion 34B are arranged at different height positions in the height direction orthogonal to the arrangement direction when viewed from above, the first bus bar 31 has an input side step 34C connecting the large input side connection portion 34A and the small input side connection portion 34B in a step shape, the large output side connection portion 35A and the small output side connection portion 35B are arranged at different height positions in the height direction orthogonal to the arrangement direction when viewed from above, and the second bus bar 32 has an output side step 35C connecting the large output side connection portion 35A and the small output side connection portion 35B in a step shape.

[0077] Since the first bus bar 31 is formed into a step shape by the input side step 34C and the second bus bar 32 is formed into a step shape by the output side step 35C, the large fuse 41 is unlikely to interfere with the bus bar 30 when mounted on the fuse mounting portion 21 .

[0078] Preferably, the shell 20 also has a pair of fuse protection walls 28 arranged on both sides of the fuse mounting portion 21, and the pair of fuse protection walls 28 can be arranged at an outer position covering the large fuse 41 from both sides and an inner position located inner than the outer position and covering the small fuse 42 from both sides.

[0079] The large fuse 41 is protected by a pair of fuse protection walls 28 located at the outer side, and the small fuse 42 is protected by a pair of fuse protection walls 28 located at the inner side.

[0080] Preferably, the pair of fuse protection walls 28 can move in a width direction perpendicular to the directions of the axes P1 and P2 and the height direction, and can be linked via the gears 29 .

[0081] When one fuse protection wall 28 is moved, the other fuse protection wall 28 can be moved via the gear 29 .

[0082] <Other Implementation Methods>

[0083] (1) In the above embodiment, the fuse mounting portion 21 is provided with the recessed portion 27 , but the fuse mounting portion may be a flat shape.

[0084] (2) In the above embodiment, the first bus bar 31 has the input side step 34C and the second bus bar 32 has the output side step 35C, but the bus bar does not necessarily have to be in a step shape. For example, the first bus bar may be formed in a branched shape, with a large input side connection portion and a small input side connection portion provided at the front end of each bus bar.

[0085] (3) In the above embodiment, the large fuse 41 and the small fuse 42 are connected to the bus bar 30 . However, the fuses 41 and 42 may not be connected to the bus bar 30 but may be held in the housing 20 as backup fuses.

[0086] (4) In the above embodiment, the terminals 41B, 41C, 42B, and 42C of the fuses 41 and 42 are fastened to the housing 20 by bolts B1 and B2, but the fixing method may not be fastening by bolts B1 and B2. For example, the fixing method may be welding, or a fixing method using a resin lock or a metal clip.

[0087] (5) In the above embodiment, the fuse mounting portion 21 is exemplified as being able to selectively mount two fuses (large fuse 41 and small fuse 42) of different sizes. However, the fuse mounting portion may be able to selectively mount three or more fuses of different sizes.

[0088] (6) In the above embodiment, the large input side fixing portion 23, the small input side fixing portion 25, the small output side fixing portion 26 and the large output side fixing portion 24 are illustrated as being arranged in a row in sequence when viewed from above. However, they do not necessarily have to be arranged in a row. For example, the fixing portions may be arranged in a configuration in which the axis P1 of the large fuse 41 and the axis P2 of the small fuse 42 are eccentric or intersecting.

[0089] (7) In the above embodiment, the fuse protection wall 28 is exemplified as being formed of a member separate from the housing 20 , but the fuse protection wall may be formed integrally with the housing.

[0090] (8) In the above embodiment, the pair of fuse protection walls 28 are linked by the rack and pinion mechanism using the gear 29 . However, the pair of fuse protection walls may be linked by a link mechanism or the like, for example.

[0091] Description of Reference Numerals

[0092] 10: Electrical connection box

[0093] 20: Housing 20A: Outer rail 21: First fuse mounting portion (fuse mounting portion) 22: Second fuse mounting portion 23: Large input side fixing portion 23A: Nut receiving portion 23B: Bolt escape portion 24: Large output side fixing portion 24A: Nut receiving portion 24B: Bolt escape portion 25: Small input side fixing portion 25A: Nut receiving portion 25B: Bolt escape portion 26: Small output side fixing portion 26A: Nut receiving portion 26B: Bolt escape portion 27: Recess 28: Fuse protection wall 28A: Inner rail 28B: Protrusion 28C: Tooth 29: Gear

[0094] 30: Bus bar 31: First bus bar (input side bus bar) 31A: External connection 31B: First fuse connection 31C: Second fuse connection 32: Second bus bar (output side bus bar) 32A: First fuse connection 33: Third bus bar 33A: Second fuse connection 34A: Large input side connection 34B: Small input side connection 34C: Input side step 34D: Bolt hole 35A: Large output side connection 35B: Small output side connection 35C: Output side step 35D: Bolt hole

[0095] 40: First fuse 41: Large fuse 41A: Large fuse body 41B: Large input terminal 41C: Large output terminal 41D: Bolt hole 42: Small fuse 42A: Small fuse body 42B: Small input terminal 42C: Small output terminal 42D: Bolt hole

[0096] 50: Second fuse

[0097] B1: Bolt B2: Bolt N: Nut P1: Axis P2: Axis

Claims

1. An electrical connection box comprising a housing and a bus bar mounted on the housing, wherein: The housing has a common fuse mounting portion, and the fuse mounting portion is respectively equipped with at least two fuses including a large fuse and a small fuse of different sizes. The fuse mounting portion includes: a large input side fixing portion for fixing a large input terminal provided at one end side of the large fuse; a large output side fixing portion for fixing a large output terminal provided at the other end side of the large fuse; a small input side fixing portion for fixing a small input terminal provided at one end side of the small fuse; and a small output side fixing portion for fixing a small output terminal provided at the other end side of the small fuse. The small input-side fixing portion and the small output-side fixing portion are arranged between the large input-side fixing portion and the large output-side fixing portion.

2. The electrical connection box according to claim 1, wherein: The busbar comprises: an input side busbar, having a large input side connection portion and a small input side connection portion, the large input side connection portion being fixed to the large input side fixing portion in a state of being connected to the large input terminal, and the small input side connection portion being fixed to the small input side fixing portion in a state of being connected to the small input terminal; and an output side busbar, having a large output side connection portion and a small output side connection portion, the large output side connection portion being fixed to the large output side fixing portion in a state of being connected to the large output terminal, and the small output side connection portion being fixed to the small output side fixing portion in a state of being connected to the small output terminal.

3. The electrical connection box according to claim 2, wherein: The large input side connection portion and the small input side connection portion are arranged at different height positions in a height direction orthogonal to the arrangement direction in a plan view, and the input side bus bar has an input side step, and the input side step connects the large input side connection portion and the small input side connection portion in a step shape. The large output side connection part and the small output side connection part are arranged at different height positions in a height direction orthogonal to the arrangement direction in a plan view, and the output side bus bar has an output side step, which connects the large output side connection part and the small output side connection part in a step shape.

4. The electrical connection box according to any one of claims 1 to 3, wherein: The housing further includes a pair of fuse protection walls, the pair of fuse protection walls being arranged on both sides of the fuse mounting portion. The pair of fuse protection walls can be arranged at an outer position covering the large fuse from both sides and an inner position located inside the outer position and covering the small fuse from both sides.

5. The electrical connection box according to claim 4, wherein: The pair of fuse protection walls are movable in a width direction perpendicular to the axial direction and the height direction, and are interlocked via gears.

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