Electrical connection box

Abstract

To provide an electric connection box that can house at least two fuses, each having a different size, to reduce costs.SOLUTION: An electric connection box 10 comprises a frame 20 and a bus bar 30 fixed on the frame 20. The frame 20 comprises a fuse mounting unit 21 on which at least two fuses are mounted in common including a large fuse 41 and a small fuse 42, those of which are different in size. The fuse mounting unit 21 comprises: a large input-side fixing unit 23 for fixing a large input terminal 41B used for the large fuse 41; a large output-side fixing unit 24 for fixing a large output terminal 41C used for the large fuse 41; a small input-side fixing unit 25 for fixing a small input terminal 42B used for the small fuse 42; and a small-output side fixing unit 26 for fixing a small output terminal 42C used for the small fuse 42. The small input-side fixing unit 25 and the small output-side fixing unit 26 are arranged between the large input-side fixing unit 23 and the large output-side fixing unit 24.SELECTED DRAWING: Figure 4

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, the electrical connection box described in Japanese Patent Application Laid-Open No. 2005-185002 (hereinafter referred to as Patent Document 1) is known. This electrical connection box includes a lower case and an upper case that is assembled by covering the upper surface side of the lower case. On the upper surface of the lower case, an input side LA terminal connection portion, an output side LA terminal connection portion, a first fusible link mounting portion adjacent to the LA terminal connection portion, a second fusible link mounting portion, a plurality of relay accommodating portions, and a fuse accommodating portion are provided.

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

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Generally, the size of the fusible link to be mounted may vary depending on the vehicle type and grade. For this reason, in the conventional electrical connection box, it is necessary to design a dedicated electrical connection box according to the fusible link of each size, which has no versatility and is costly.

Means for Solving the Problem

[0006] The electrical connection box of the present disclosure is an electrical connection box including a housing and a bus bar attached to the housing, wherein the housing includes a common fuse mounting portion on which at least two fuses including a large fuse and a small fuse having different sizes are mounted respectively, the fuse mounting portion includes a large input side fixing portion to which a large input terminal provided on one end side of the large fuse is fixed, a large output side fixing portion to which a large output terminal provided on the other end side of the large fuse is fixed, a small input side fixing portion to which a small input terminal provided on one end side of the small fuse is fixed, and a small output side fixing portion to which a small output terminal provided on the other end side of the small fuse is fixed, 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.

Effect of the Invention

[0007] According to the present disclosure, at least two fuses having different sizes can be mounted in the same electrical connection box, and the cost can be suppressed.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

DETAILED DESCRIPTION OF THE INVENTION

[0009] [Description of Embodiments of the Present Disclosure] First, embodiments of the present disclosure will be listed and described. (1) The electrical connection box of the present disclosure is an electrical connection box including a housing and a bus bar attached to the housing, wherein the housing includes a common fuse mounting portion on which at least two fuses including large fuses and small fuses having different sizes are respectively mounted, and the fuse mounting portion includes a large input side fixing portion to which a large input terminal provided at one end side of the large fuse is fixed, a large output side fixing portion to which a large output terminal provided at the other end side of the large fuse is fixed, a small input side fixing portion to which a small input terminal provided at one end side of the small fuse is fixed, and a small output side fixing portion to which a small output terminal provided at the other end side of the small fuse is fixed, 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.

[0010] 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. 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 it is possible to mount a large fuse and a small fuse on one fuse mounting portion in this way, at least two fuses having different sizes can be mounted in the same electrical connection box, and the cost can be reduced.

[0011] (2) Preferably, the bus bar includes an input-side bus bar having a large-input-side connection portion fixed to the large-input-side fixing portion while being connected to the large-input terminal and a small-input-side connection portion fixed to the small-input-side fixing portion while being connected to the small-input terminal, and an output-side bus bar having a large-output-side connection portion fixed to the large-output-side fixing portion while being connected to the large-output terminal and a small-output-side connection portion fixed to the small-output-side fixing portion while being connected to the small-output terminal. To connect the large fuse to the input-side bus bar, fix the large-input-side connection portion together with the large-input terminal to the large-input-side fixing portion. To connect the large fuse to the output-side bus bar, fix the large-output-side connection portion together with the large-output terminal to the large-output-side fixing portion. To connect the small fuse to the input-side bus bar, fix the small-input-side connection portion together with the small-input terminal to the small-input-side fixing portion. To connect the small fuse to the output-side bus bar, fix the small-output-side connection portion together with the small-output terminal to the small-output-side fixing portion. Since either the large fuse or the small fuse can be selected in this way to connect the input-side bus bar and the output-side bus bar, the same electrical connection box can be used to accommodate different vehicle models and grades.

[0012] (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 in a plan view, the input-side bus bar has an input-side step connecting the large-input-side connection portion and the small-input-side connection portion in a stepped manner, 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 in a plan view, and the output-side bus bar has an output-side step connecting the large-output-side connection portion and the small-output-side connection portion in a stepped manner. Since the input-side bus bar is formed in a stepped shape by the input-side step and the output-side bus bar is formed in a stepped shape by the output-side step, it is less likely to interfere with the bus bar when mounting the large fuse on the fuse mounting portion.

[0013] (4) The housing further includes a pair of fuse protection walls arranged on both sides of the fuse mounting portion. The pair of fuse protection walls are preferably arranged to be movable to an outer position that covers the large fuse from both sides and an inner position that is located more inward than the outer position and covers the small fuse from both sides. The large fuse is protected by a pair of fuse protection walls at the outer position, and the small fuse is protected by a pair of protection walls at the inner position.

[0014] (5) The pair of fuse protection walls , axis are preferably movable in the width direction orthogonal to the line direction and the height direction and are interlockable via gears. When one fuse protection wall is moved, the other fuse protection wall can be moved via gears.

[0015] [Details of Embodiments of the Present Disclosure] Specific examples of the present disclosure Electrical connection box will be described below with reference to the drawings. It should be noted that the present disclosure is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0016] <Embodiment> Embodiments of the present disclosure will be described with reference to FIGS. 1 to 8. The electrical connection box 10 of the present embodiment is mounted on a vehicle such as an electric vehicle or a hybrid vehicle and is arranged in a power supply path from a power source such as a battery to a load such as auxiliary equipment.

[0017] [Overall Configuration of Electrical Connection Box] As shown in FIG. 1, 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 located above the housing 20 in the illustration in FIG. 1, and the second fuse 50 is located below the first fuse 40 in the illustration in FIG. 1.

[0018] The housing 20 is made of synthetic resin and includes a lower case to which the bus bar 30 and the like are fixed, and a cover (not shown) that is assembled to the lower case from above and covers the bus bar 30 and the like. In this embodiment, only the lower case is disclosed.

[0019] The bus bar 30 is a member formed by punching and bending a metal plate material, and includes a first bus bar 31, a second bus bar 32, and a third bus bar 33. The first bus bar 31 is located on the right side of the housing 20 in FIG. 1, and the second bus bar 32 and the third bus bar 33 are located on the left side of the first bus bar 31 in FIG. 1. The second bus bar 32 is located above the third bus bar 33 in FIG. 1.

[0020] The first bus bar 31 has an external connection portion 31A, and a power supply side cable is connected to the external connection portion 31A. The electric 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 includes 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.

[0021] 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. One load side cable is connected to the first fuse connection portion 32A, and the other load side cable is connected to the second fuse connection portion 33A. Therefore, the electric power input from the power supply side cable is branched at the first bus bar 31 and then 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.

[0022] [Housing] The housing 20 includes a first fuse mounting portion 21 on which a first fuse 40 is mounted, and a second fuse mounting portion 22 on which a second fuse 50 is mounted. In the following, the first fuse mounting portion 21 will be described and will be abbreviated as the fuse mounting portion 21.

[0023] The fuse mounting portion 21 is a shared fuse mounting portion 21 on which the large fuse 41 shown in FIG. 1 and the small fuse 42 shown in FIG. 2, which have different sizes from each other, are respectively mounted. The first fuse 40 is a general term for the large fuse 41 and the small fuse 42.

[0024] [Large fuse] As shown in FIG. 4, 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 has a substantially cylindrical shape and extends along an axis P1 passing through its center. Both the large input terminal 41B and the large output terminal 41C have a flat plate shape and extend along the axis P1. Both the large input terminal 41B and the large output terminal 41C have bolt holes 41D.

[0025] [Small fuse] As shown in FIG. 8, the small fuse 42 includes a small fuse body 42A, a small input terminal 42B that protrudes downward from the lower surface on one end side of the small fuse body 42A and then protrudes to the right side in the drawing, and a small output terminal 42C that protrudes downward from the lower surface on the other end side of the small fuse body 42A and then protrudes to the left side in the drawing. The small fuse body 42A has a substantially cylindrical shape and extends in the direction of axis P2. Both the small input terminal 42B and the small output terminal 42C have a flat plate shape and extend along the axis P2. Both the small input terminal 42B and the small output terminal 42C have bolt holes 42D.

[0026] 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. Also, the diameter dimension of the large fuse body 41A is larger than the diameter dimension of the small fuse body 42A. The plate thicknesses of the large input terminal 41B and the large output terminal 41C are larger than the plate thicknesses of the small input terminal 42B and the small output terminal 42C.

[0027] [Fuse Mounting Portion] The fuse mounting portion 21 includes a large input side fixing portion 23 to which the large input terminal 41B is fixed, a large output side fixing portion 24 to which the large output terminal 41C is fixed, a small input side fixing portion 25 to which the small input terminal 42B is fixed, and a small output side fixing portion 26 to which the small output terminal 42C is fixed. 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.

[0028] 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 configured 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. As shown in FIG. 4, the lower half of the large fuse body 41A is accommodated in the recessed portion 27. As shown in FIG. 8, the entire small fuse 42 is accommodated in the recessed portion 27.

[0029] As shown in FIG. 4, the large input side fixing portion 23 includes a nut N, a nut accommodating portion 23A that rotatably accommodates the nut N, and a bolt relief portion 23B that allows the shaft portion of the large bolt B1 to pass through. The large output side fixing portion 24, the small input side fixing portion 25, and the small output side fixing portion 26 have the same configuration as the large input side fixing portion 23.

[0030] The large output side fixing portion 24 includes a nut N, a nut accommodating portion 24A, and a bolt relief portion 24B. The small input side fixing portion 25 includes a nut N, a nut accommodating portion 25A, and a bolt relief portion 25B. The small output side fixing portion 26 includes a nut N, a nut accommodating portion 26A, and a bolt relief portion 26B.

[0031] [Connection Structure of Large Fuse] The first fuse connection part 31B of the first bus bar 31 is formed along the outer surface of the large fuse 41. The first fuse connection part 31B includes a large input side connection part 34A that is fixed to the large input side fixing part 23 while being connected to the large input terminal 41B, a small input side connection part 34B that is fixed to the small input side fixing part 25 while being connected to the small input terminal 42B, and an input side step 34C that connects the large input side connection part 34A and the small input side connection part 34B in a stepped manner. The large input side connection part 34A is arranged at a position higher than that of the small input side connection part 34B in the height direction orthogonal to the directions of the axes P1 and P2. Both the large input side connection part 34A and the small input side connection part 34B have bolt holes 34D.

[0032] The first fuse connection part 32A of the second bus bar 32 includes a large output side connection part 35A that is fixed to the large output side fixing part 24 while being connected to the large output terminal 41C, a small output side connection part 35B that is fixed to the small output side fixing part 26 while being connected to the small output terminal 42C, and an output side step 35C that connects the large output side connection part 35A and the small output side connection part 35B in a stepped manner. The large output side connection part 35A is arranged at a position higher than that of the small output side connection part 35B in the height direction orthogonal to the directions of the axes P1 and P2. Both the large output side connection part 35A and the small output side connection part 35B have bolt holes 35D.

[0033] 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 this order in a plan view. The arrangement direction in which 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 plan view coincides with the directions of the axes P1 and P2.

[0034] As shown in FIG. 4, the bolt hole 34D of the large input side connection portion 34A and the nut N of the large input side fixing portion 23 are arranged coaxially. When the large input terminal 41B is placed on the large input side connection portion 34A, the bolt hole 34D of the large input side connection portion 34A, the nut N of the large input side fixing portion 23, and the bolt hole 41D of the large input terminal 41B are arranged coaxially. When 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 portion 34A are clamped between the head of the bolt B1 and the nut N, so that the first fuse connection portion 31B of the first bus bar 31 and the large input terminal 41B of the large fuse 41 are connected in a conductible state and fixed to the large input side fixing portion 23.

[0035] The bolt hole 35D of the large output side connection portion 35A and the nut N of the large output side fixing portion 24 are arranged coaxially. When the large output terminal 41C is placed on the large output side connection portion 35A, the bolt hole 35D of the large output side connection portion 35A, the nut N of the large output side fixing portion 24, and the bolt hole 41D of the large output terminal 41C are arranged coaxially. When 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 portion 35A are clamped between the head of the bolt B1 and the nut N, so that the first fuse connection portion 32A of the second bus bar 32 and the large output terminal 41C of the large fuse 41 are connected in a conductible state and fixed to the large output side fixing portion 24.

[0036] [Connection structure of small fuse] As shown in FIG. 8, the bolt hole 34D of the small input side connection portion 34B and the nut N of the small input side fixing portion 25 are arranged coaxially. When the small input terminal 42B is placed on the small input side connection portion 34B, the bolt hole 34D of the small input side connection portion 34B, the nut N of the small input side fixing portion 25, and the bolt hole 42D of the small input terminal 42B are arranged coaxially. When the 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 portion 34B are clamped between the head of the bolt B2 and the nut N, so that the first fuse connection portion 31B of the first bus bar 31 and the small input terminal 42B of the small fuse 42 are connected in a conductible state and fixed to the small input side fixing portion 25.

[0037] The bolt hole 35D of the small output side connection part 35B and the nut N of the small output side fixing part 26 are arranged coaxially. 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 arranged coaxially. When 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 conductively connected and fixed to the small output side fixing part 26.

[0038] [Fuse protection wall] As shown in FIG. 1, the housing 20 includes a pair of fuse protection walls 28 arranged on both sides in the width direction of the fuse mounting part 21. Here, the width direction is a direction orthogonal to the axis P1 direction and the height direction. The pair of fuse protection walls 28 can be arranged at the outer position shown in FIG. 1 and the inner position shown in FIG. 2. The pair of fuse protection walls 28 at the inner position are located more inward than the pair of fuse protection walls 28 at the outer position. The pair of fuse protection walls 28 at the outer position cover the large fuse 41 from both sides in the width direction, and the pair of fuse protection walls 28 at the inner position cover the small fuse 42 from both sides in the width direction.

[0039] As shown in FIG. 4, the fuse protection wall 28 is formed larger than the large fuse 41 and smaller than the recess 27 in the axis P1 direction. Also, the fuse protection wall 28 is formed larger than the large fuse 41 and larger than the recess 27 in the height direction. That is, although the upper half of the large fuse 41 protrudes from the recess 27, this protruding part is covered from both sides in the width direction by the pair of fuse protection walls 28.

[0040] At the lower end of the fuse protection wall 28, as shown in FIG. 5, an inner rail 28A is provided. The inner rail 28A extends in the width direction in a form orthogonal to the fuse protection wall 28. On the other hand, at the lower end of the housing 20, an outer rail 20A into which the inner rail 28A can be inserted is provided. By moving the inner rail 28A along the outer rail 20A, the fuse protection wall 28 can be moved in the width direction between the outer position and the inner position.

[0041] Convex portions 28B are provided on the upper surface of the inner rail 28A. On the other hand, on the inner surface of the outer rail 20A, a pair of concave portions into which the convex portions 28B fit at the outer position and the inner position are provided. By fitting the convex portions 28B of the inner rail 28A into the concave portions of the outer rail 20A, the fuse protection wall 28 is positioned and held at the outer position and the inner position, respectively.

[0042] As shown in FIG. 6, the pair of inner rails 28A are arranged to be point-symmetric about the gear 29. The inner rail 28A has teeth 28C that mesh with the gear 29. The gear 29 meshes with the respective teeth 28C while being sandwiched between the pair of inner rails 28A. For this reason, the pair of fuse protection walls 28 can be interlocked 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 also moves to the other side in the width direction accordingly.

[0043] [Operation and Effect of the Embodiment] The electrical connection box 10 of the present disclosure is an electrical connection box 10 including a housing 20 and a bus bar 30 attached to the housing 20. The housing 20 includes a common fuse mounting portion 21 on which a large fuse 41 and a small fuse 42 having different sizes are respectively mounted. The fuse mounting portion 21 includes a large input side fixing portion 23 to which a large input terminal 41B provided on one end side of the large fuse 41 is fixed, a large output side fixing portion 24 to which a large output terminal 41C provided on the other end side of the large fuse 41 is fixed, a small input side fixing portion 25 to which a small input terminal 42B provided on one end side of the small fuse 42 is fixed, and a small output side fixing portion 26 to which a small output terminal 42C provided on the other end side of the small fuse 42 is fixed. 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. This is the electrical connection box 10.

[0044] 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. 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 having different sizes can be mounted in the same electrical connection box 10, and the cost can be reduced.

[0045] The bus bar 30 preferably includes a first bus bar 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 bus bar 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. To connect the large fuse 41 to the first bus bar 31, fix the large input-side connection part 34A together with the large input terminal 41B to the large input-side fixing part 23. To connect the large fuse 41 to the second bus bar 32, fix the large output-side connection part 35A together with the large output terminal 41C to the large output-side fixing part 24. To connect the small fuse 42 to the first bus bar 31, fix the small input-side connection part 34B together with the small input terminal 42B to the small input-side fixing part 25. To connect the small fuse 42 to the second bus bar 32, fix the small output-side connection part 35B together with the small output terminal 42C to the small output-side fixing part 26. Since either the large fuse 41 or the small fuse 42 can be selected in this way to connect the first bus bar 31 and the second bus bar 32, the same electrical connection box 10 can accommodate different vehicle models and grades.

[0046] The large input-side connection part 34A and the small input-side connection part 34B are arranged at different height positions in the height direction orthogonal to the arrangement direction in plan view. The first bus bar 31 has an input-side step 34C that connects the large input-side connection part 34A and the small input-side connection part 34B in a stepped manner. The large output-side connection part 35A and the small output-side connection part 35B are arranged at different height positions in the height direction orthogonal to the arrangement direction in plan view. The second bus bar 32 preferably has an output-side step 35C that connects the large output-side connection part 35A and the small output-side connection part 35B in a stepped manner. Since the first bus bar 31 is formed in a stepped manner by the input-side step 34C and the second bus bar 32 is formed in a stepped manner by the output-side step 35C, it is less likely to interfere with the bus bar 30 when mounting the large fuse 41 on the fuse mounting part 21.

[0047] The housing 20 further includes a pair of fuse protection walls 28 arranged on both sides of the fuse mounting part 21. The pair of fuse protection walls 28 are preferably arranged at an outer position that covers the large fuse 41 from both sides and an inner position that is located more inside than the outer position and covers the small fuse 42 from both sides. The large fuse 41 is protected by the pair of fuse protection walls 28 at the outer position, and the small fuse 42 is protected by the pair of fuse protection walls 28 at the inner position.

[0048] It is preferable that the pair of fuse protection walls 28 can move in the width direction orthogonal to the axial directions of P1 and P2 and the height direction, and can be interlocked via the gear 29. When one of the fuse protection walls 28 is moved, the other fuse protection wall 28 can be moved via the gear 29.

[0049] <Other Embodiments> (1) In the above embodiment, the fuse mounting portion 21 having the concave portion 27 is exemplified, but the fuse mounting portion may have a flat shape.

[0050] (2) In the above embodiment, the first bus bar 31 having the input-side step 34C and the second bus bar 32 having the output-side step 35C are exemplified, but the bus bar does not necessarily have a stepped shape. For example, the first bus bar may be formed in a branched shape, and a large input-side connection portion and a small input-side connection portion may be provided at each tip portion.

[0051] (3) In the above embodiment, the large fuse 41 and the small fuse 42 are exemplified as being connected to the bus bar 30, but each of the fuses 41 and 42 may not be connected to the bus bar 30 and may only be held in the housing 20 as spare fuses.

[0052] (4) In the above embodiment, the terminals 41B, 41C, 42B, and 42C of each of the fuses 41 and 42 are exemplified as being fastened to the housing 20 with bolts B1 and B2, but the fixing method does not have to be fastening with the bolts B1 and B2. For example, the fixing method may be welding, or a fixing method using resin lock or metal clip.

[0053] (5) In the above embodiment, the fuse mounting portion 21 on which two fuses of different sizes (the large fuse 41 and the small fuse 42) can be selectively mounted is exemplified, but it may be a fuse mounting portion on which three or more fuses of different sizes can be selectively mounted.

[0054] (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 arranged in a line in this order in a plan view as an example. However, they do not necessarily have to be arranged in a line. For example, the fixing portions may be provided in an arrangement where the axis P1 of the large fuse 41 and the axis P2 of the small fuse 42 are eccentric or intersect.

[0055] (7) In the above embodiment, the fuse protection wall 28 formed as a separate member from the housing 20 is exemplified. However, the fuse protection wall may be formed integrally with the housing.

[0056] (8) In the above embodiment, the pair of fuse protection walls 28 are interlocked by a rack and pinion mechanism using the gear 29. However, for example, the pair of fuse protection walls may be interlocked by a link mechanism or the like.

Explanation of Reference Numerals

[0057] 10: Electrical connection box 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 accommodating portion 23B: Bolt relief portion 24: Large output side fixing portion 24A: Nut accommodating portion 24B: Bolt relief portion 25: Small input side fixing portion 25A: Nut accommodating portion 25B: Bolt relief portion 26: Small output side fixing portion 26A: Nut accommodating portion 26B: Bolt relief portion 27: Concave portion 28: Fuse protection wall 28A: Inner rail 28B: Convex portion 28C: Tooth 29: Gear 30: Bus bar 31: First bus bar (input side bus bar) 31A: External connection portion 31B: First fuse connection portion 31C: Second fuse connection portion 32: Second bus bar (output side bus bar) 32A: First fuse connection portion 33: Third bus bar 33A: Second fuse connection portion 34A: Large input side connection portion 34B: Small input side connection portion 34C: Input side step 34D: Bolt hole 35A: Large output side connection portion 35B: Small output side connection portion 35C: Output side step 35D: Bolt hole 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 50: Second fuse B1: Bolt B2: Bolt N: Nut P1: Axis P2: Axis

Claims

1. An electrical connection box comprising a housing and a bus bar attached to the housing, wherein the housing includes a common fuse mounting portion on which at least two fuses including a large fuse and a small fuse having different sizes are respectively mounted, the fuse mounting portion includes a large input side fixing portion to which a large input terminal provided on one end side of the large fuse is fixed, a large output side fixing portion to which a large output terminal provided on the other end side of the large fuse is fixed, a small input side fixing portion to which a small input terminal provided on one end side of the small fuse is fixed, and a small output side fixing portion to which a small output terminal provided on the other end side of the small fuse is fixed, 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. The electrical connection box.

2. The bus bar includes an input side bus bar having a large input side connection portion fixed to the large input side fixing portion in a state of being connected to the large input terminal and a small input side connection portion 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 fixed to the large output side fixing portion in a state of being connected to the large output terminal and a small output side connection portion fixed to the small output side fixing portion in a state of being connected to the small output terminal. The electrical connection box according to claim 1.

3. 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 plan view, and the input side bus bar has an input side step connecting the large input side connection portion and the small input side connection portion in a stepped manner, 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 in plan view, and the output side bus bar has an output side step connecting the large output side connection portion and the small output side connection portion in a stepped manner. The electrical connection box according to claim 2.

4. The housing further includes a pair of fuse protection walls arranged on both sides of the fuse mounting portion, and 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 more inward than the outer position and covering the small fuse from both sides. The electrical connection box according to any one of claims 1 to 3.

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

Images