Electrical connection structure

Abstract

A holding portion in which the power distribution unit is inserted and held is formed in a housing of the electrical connection structure. Here, the power distribution unit includes a main body formed so as to have a symmetrical shape that is rotated substantially twice with respect to an imaginary line extending in the first direction. A protrusion is formed on the main body and / or the holding portion, and a groove into which the protrusion is inserted and a restricting wall which interferes with the protrusion when the power distribution unit is reversely inserted are formed on the holding portion and / or the main body. Further, a protrusion-side inclined surface is formed in the protrusion, and when the power distribution unit is inserted in a state in which the power distribution unit is in a normal position, the protrusion-side inclined surface can introduce the protrusion into the groove by making contact with the restricting wall.

Description

Technical Field

[0001] The invention relates to an electrical connection structure. Background Art

[0002] As a conventional electrical connection structure, an electrical connection structure disclosed in patent document JP2013-013290A has been proposed. JP2013-013290A discloses an electrical connection box (electrical connection structure) including: a box body (housing) having a holding portion; and a power distribution unit inserted into and held in the box body (housing). Summary of the invention

[0003] When such a power distribution unit is inserted and held in the housing, it is preferable to suppress the power distribution unit from being erroneously inserted into the housing, and also further improve the insertion operation of the power distribution unit.

[0004] An object of the present invention is to provide an electrical connection structure that can suppress a power distribution unit from being erroneously inserted into a housing and further improve the insertion operation of the power distribution unit.

[0005] The electrical connection structure according to an aspect of the present invention comprises: a shell having a holding portion; and a power distribution unit, which is inserted into and held in the holding portion, wherein the holding portion comprises: a housing space, which is open on one side in a first direction and accommodates the power distribution unit by moving the power distribution unit relative to the shell to the other side in the first direction; and a wall, which defines the housing space, and the power distribution unit is provided with a main body, which comprises: a bus bar, which has a power connection portion and a plurality of load connection portions, and the bus bar is capable of distributing power; a plurality of fuse portions, which are inserted between the power connection portion and the load connection portion; and a cover, which is used to hold the bus The main body is formed to have a symmetrical shape rotated approximately twice relative to an imaginary line extending in the first direction, a protrusion is formed on at least one of the main body and the retaining portion, and a groove and a limiting wall are formed on at least the other of the main body and the retaining portion. When the power distribution unit is inserted into the accommodating space in a normal position, the protrusion is inserted into the groove. When the power distribution unit is inserted into the accommodating space in an inverted position, the limiting wall interferes with the protrusion, and a protrusion side inclined surface is formed in the protrusion. When the power distribution unit is inserted into the accommodating space in the normal position, the protrusion side inclined surface can introduce the protrusion into the groove by contacting the limiting wall.

[0006] According to the present invention, it is possible to provide an electrical connection structure that can suppress the power distribution unit from being erroneously inserted into the housing and further improve the insertion operation of the power distribution unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 : is a perspective view showing an example of an electrical connection structure according to an embodiment, in which the electrical connection structure without a rescue terminal is viewed from one direction.

[0008] Figure 2 is a perspective view showing an example of an electrical connection structure according to an embodiment, in which the electrical connection structure without a rescue terminal is viewed from another direction.

[0009] Figure 3 is a perspective view showing an example of an electrical connection structure according to an embodiment, in which the electrical connection structure having a rescue terminal is viewed from one direction.

[0010] Figure 4 is a perspective view showing an example of an electrical connection structure according to an embodiment, in which the electrical connection structure having a rescue terminal is viewed from another direction.

[0011] Figure 5 is a perspective view of an example of a base unit according to an embodiment viewed from one direction.

[0012] Figure 6 is a perspective view of an example of a base unit according to an embodiment viewed from another direction.

[0013] Figure 7 is an exploded perspective view of an example of a base unit according to an embodiment, viewed from one direction.

[0014] Figure 8 is an exploded perspective view of the base unit according to the embodiment viewed from another direction.

[0015] Fig. 9 is a plan view showing an example of a housing according to the embodiment.

[0016] Fig.10 is a rear view showing an example of a housing according to an embodiment.

[0017] Fig.11 is a perspective view schematically showing an example of a power distribution circuit according to an embodiment and an example of a battery circuit having no rescue terminal.

[0018] Fig.12 is a perspective view schematically showing an example of a power distribution circuit and an example of a battery circuit having a rescue terminal according to an embodiment.

[0019] Fig.131 is an exploded perspective view showing some of the components constituting a part of an example of a base unit according to an embodiment, in an example in which they are inserted into a housing from below.

[0020] Fig.14 is an exploded perspective view showing an example of a terminal block according to the embodiment.

[0021] Fig.15 is a front view showing an example of a multi-fuse unit according to an embodiment.

[0022] Fig.16 is a rear view showing an example of a multi-fuse unit according to an embodiment.

[0023] Fig.17 is a plan view showing an example of a multi-fuse unit according to an embodiment.

[0024] Fig.18 is a rear side view showing an example of a multi-fuse unit according to an embodiment.

[0025] Fig.19 is a side view showing one side of an example of a multi-fuse unit according to an embodiment.

[0026] Fig. 20 is a side view showing another side of an example of a multi-fuse unit according to an embodiment.

[0027] Fig.21 is a front view showing an example of a bus bar provided in an example of a multi-fusible link unit according to an embodiment.

[0028] Fig. 22 : is a rear view showing an example of a bus bar provided in an example of a multi-fusible link unit according to the embodiment.

[0029] Fig.23 is a perspective view showing an enlarged example of a restriction wall according to the embodiment.

[0030] Fig.24 2 is a diagram for explaining a state in which a protrusion is guided into a groove when an example of a multi-fusible link unit according to an embodiment is inserted into an accommodation space in a state of a normal position.

[0031] Fig.25 1 is a diagram for explaining a state in which a protrusion moves in a direction away from a groove by a restriction wall when an example of a multi-fusible link unit according to an embodiment is inserted into an accommodation space in a state of a reverse position.

[0032] Fig.26 is a diagram illustrating an example of an assembling method of an electrical connection structure having no rescue terminal.

[0033] Fig. 27is a diagram illustrating an example of an assembling method of an electrical connection structure provided with a rescue terminal, and is a diagram illustrating a state before a bus bar having a rescue terminal and a rescue terminal cover are assembled to a base unit.

[0034] Fig.28 is a diagram illustrating an example of an assembling method of an electrical connection structure provided with a rescue terminal, and is a diagram illustrating a state in which a rescue terminal cover is assembled to a base unit.

[0035] Fig.29 is a diagram illustrating an example of an assembling method of an electrical connection structure provided with a rescue terminal, and is a diagram illustrating a state in which a rescue terminal cover is opened while assembling a bus bar having a rescue terminal and a rescue terminal cover to a base unit. DETAILED DESCRIPTION

[0036] Various embodiments will be described below with reference to the accompanying drawings.

[0037] Hereinafter, the electrical connection structure according to the present embodiment will be described in detail with reference to the accompanying drawings. Note that the dimensional ratios of the drawings are exaggerated for convenience of explanation and may be different from the actual ratios.

[0038] In the following embodiments, a multi-fuse unit having a plurality of fusible link parts is exemplified as a power distribution unit.

[0039] The direction of inserting the multi-fusible link unit is defined as the Z direction (up-down direction: first direction), the longitudinal direction of the housing is defined as the Y direction (width direction: second direction), and the short side direction of the housing is defined as the X direction (front-back direction: third direction).

[0040] In addition, a description will be given about the electrical connection structure by defining the up-down direction of each component in a state where the electrical connection structure is arranged to be held in the housing by moving the multi-fuse from the upper side to the lower side. In addition, a side where the multi-fuse unit is located is defined as a front side in the X direction (front-rear direction: third direction), and a side where the electronic components other than the multi-fuse unit are located is defined as a rear side in the X direction (front-rear direction: third direction).

[0041] like Figures 1 to 4 As shown, the electrical connection structure 1 according to the present embodiment includes a housing 2, a power distribution circuit component 30 held in the housing 2, and a battery circuit component 40 held in the housing 2 at a position different from the position where the power distribution circuit component 30 is held.

[0042] Here, the power distribution circuit component 30 is a component constituting a part of the power distribution circuit 3, and the power distribution circuit 3 is used to distribute the power supplied from the power supply 8 to the plurality of loads 9. In this embodiment, as shown in FIG. Fig.11 and Fig.12As shown, the power circuit component 30 includes a power terminal block 31 having a power bolt (power terminal) 312 electrically connected to the power source 8 via an electric wire 81. The power circuit component 30 also includes: a power distribution bus 32 electrically connected to the power bolt (power terminal) 312; and an electronic component 33 electrically connected to the power distribution bus 32. For example, an accessory (ACC) power supply can be used as the power source 8. In addition, the load 9 to which the power is distributed includes, for example, an auxiliary machine such as an electric power steering system (EPS) or other electrical connection structures.

[0043] The battery circuit component 40 is a component electrically connected to the battery 6, and constitutes a part of the battery circuit 4 for receiving power supply from the battery 6 and charging the battery 6. In this embodiment, Fig.11 and Fig.12 As shown, the battery circuit component 40 includes a battery circuit terminal block 41. The battery circuit terminal block 41 includes a first bolt (battery connection terminal) 412 electrically connected to the battery 6 via an electric wire 61 and a second bolt (load connection terminal) 413 connected to the load 7 via an electric wire 71. In addition, the battery circuit component 40 includes a battery circuit bus bar 42 for electrically connecting the first bolt (battery connection terminal) 412 and the second bolt (load connection terminal) 413.

[0044] The electrical connection structure 1 having the above-described configuration is a component constituting a part of an electrical connection box such as a junction box, a relay box, and a fuse box installed in a vehicle such as an automobile. For example, the electrical connection box can be formed by covering the upper and lower parts of the electrical connection structure 1 with an upper cover and a lower cover (not shown). In addition, the electrical connection box can be formed by accommodating the electrical connection structure 1 in a housing (not shown) together with other electrical devices.

[0045] Furthermore, in the present embodiment, the electrical connection structure 1 is configured to be compatible with various vehicle specifications such as vehicle model and grade. Figure 1 and Figure 2 As shown, the electrical connection structure 1 without the rescue terminal 43 is installed on a vehicle such as a gasoline engine vehicle in which the battery 6 is provided in the engine room. Figure 3 and Figure 4 As shown, the electrical connection structure 1 provided with the rescue terminal 43 is mounted on a vehicle such as an electric vehicle (eg, a hybrid vehicle) in which the battery 6 is provided in a luggage space other than an engine room. The rescue terminal 43 is a component for receiving battery charge from another vehicle.

[0046] As described above, in the present embodiment, it is possible to select the electrical connection structure 1 without the rescue terminal 43 or the electrical connection structure 1 provided with the rescue terminal 43. By selecting any one of the electrical connection structures 1, it is possible to be compatible with various vehicle specifications.

[0047] In the present embodiment, when the electrical connection structure 1 is not provided with the rescue terminal 43 , the alternator is connected to the load 7 side, and the battery 6 is charged by the alternator (load 7 ).

[0048] In contrast, when the electrical connection structure 1 is provided with the rescue terminal 43, the starter is connected to the load 7 side, and the starter (load 7) is powered from the battery 6. In addition, the clip portion of the booster cable is connected to the rescue terminal 43, and thus the battery 6 can be charged from another vehicle.

[0049] Next, a specific configuration of the electrical connection structure 1 according to the present embodiment will be described.

[0050] The housing 2 is in a substantially rectangular parallelepiped shape, and includes a wall 21 serving as a frame of the housing 2. For example, the housing 2 can be formed by using a material having electrical insulation properties (resin such as polypropylene).

[0051] The wall 21 has a peripheral wall 211 and a partition wall 212, and a plurality of spaces (see FIG. 1 ) penetrating in the Z direction (up-down direction: first direction) are defined by the peripheral wall 211 and the partition wall 212. Fig. 9 and Fig.10 The power distribution circuit component 30 and the battery circuit component 40 are accommodated in a space defined by the peripheral wall 211 and the partition wall 212 .

[0052] Specifically, the housing 2 includes a power terminal block holding portion 22, in which an accommodation space 221 for accommodating and holding the power terminal block 31 is formed. In the present embodiment, a holding protrusion 222 is formed on a wall 21 defining the accommodation space 221 in a manner of protruding into the accommodation space 221. The power terminal block 31 is accommodated in the accommodation space 221 of the power terminal block holding portion 22 while being held by the holding protrusion 222. In the present embodiment, the power terminal block 31 is held in the housing 2 by being inserted into the accommodation space 221 from the lower side (the other side) in the Z direction (the up-down direction: the first direction).

[0053] The housing 2 also includes a battery circuit terminal block holding portion 23, in which a receiving space 231 for storing and holding a battery circuit terminal block 41 is formed. In the present embodiment, a retaining protrusion 232 is formed on a wall 21 defining the receiving space 231 in a manner protruding into the receiving space 231. The battery circuit terminal block 41 is received in the receiving space 231 of the battery circuit terminal block holding portion 23 while being held by the retaining protrusion 232. In the present embodiment, the battery circuit terminal block 41 is also retained in the housing 2 by being inserted into the receiving space 231 from the lower side (the other side) in the Z direction (the up-down direction: the first direction). In the present embodiment, the battery circuit bus bar 42 is mounted on the battery circuit terminal block 41 from the upper side (one side) in the Z direction (the up-down direction: the first direction).

[0054] Furthermore, the housing 2 includes a fuse holding portion 24 in which an accommodation space 241 for accommodating and holding fuses 332 and 452 as the electronic components 33 and 45 is formed. In the present embodiment, the fuses 332 and 452 are held in the housing 2 by being inserted into the accommodation space 241 from the upper side (one side) in the Z direction (up-down direction: first direction). Furthermore, a tuning fork terminal insertion space 2411 is formed at the lower portion of the accommodation space 241 in the Z direction (up-down direction: first direction), into which the tuning fork terminal 3223 formed in the power distribution bus bar 32 and the tuning fork terminal 444 formed in the battery-side power distribution bus bar 44 are inserted. In the present embodiment, the tuning fork terminals 3223 and 444 are inserted into the accommodation space 241 (tuning fork terminal insertion space 2411) from the lower side (the other side) in the Z direction (up-down direction: first direction). In addition, an external connection terminal insertion space 2412 is formed at a position facing the tuning fork terminal insertion space 2411 in the lower part in the Z direction (up-down direction: first direction) of the accommodation space 241, and an external connection terminal (not shown) connected to the other end of the electric wire, one end of which is connected to the load, is inserted into the external connection terminal insertion space 2412. In the present embodiment, the external connection terminal (not shown) is also inserted into the accommodation space 241 (external connection terminal insertion space 2412) from the lower side (the other side) in the Z direction (up-down direction: first direction).

[0055] The tuning fork terminals 3223 and 444 are configured to hold the power side terminal 3321 of the fuse 332 and the power side terminal 4521 of the fuse 452 when the fuses 332 and 452 are inserted into the accommodation space 241 from the upper side (one side) in the Z direction (up-down direction: the first direction). When the external connection terminal is inserted into the external connection terminal insertion space 2412 of the accommodation space 241 from the lower side (the other side) in the Z direction (up-down direction: the first direction), the external connection terminal (not shown) is connected to the load side terminal 3322 of the fuse 332 and the load side terminal 4522 of the fuse 452. Therefore, the power supply 8 and the battery 6 are electrically connected to the load (not shown) via the fuses 332 and 452, thereby forming a circuit (power distribution circuit 3 or battery circuit 4) having a fuse function.

[0056] The housing 2 also includes a relay holding portion 25 in which a receiving space 251 is formed for receiving and holding relays 331 and 451 as the electronic components 33 and 45. In the present embodiment, the relays 331 and 451 are held in the housing 2 by being inserted into the receiving space 251 from the upper side (one side) in the Z direction (up-down direction: first direction). In addition, a strip plate-shaped terminal insertion space 2511 is formed at the lower part of the receiving space 251 in the Z direction (up-down direction: first direction). The strip plate-shaped terminals 3212, 3222, and 3223 formed in the power distribution bus bar 32 and the strip plate-shaped terminal 443 formed in the battery-side power distribution bus bar 44 are inserted into the strip plate-shaped terminal insertion space 2511. In the present embodiment, the strip-shaped terminals 3212, 3222, 3223 and 443 are inserted into the accommodation space 251 (the strip-shaped terminal insertion space 2511) from the lower side (the other side) in the Z direction (the up-down direction: the first direction). In addition, an external connection terminal insertion space 2512 is formed at a position facing the strip-shaped terminal insertion space 2511 in the lower part of the accommodation space 251 in the Z direction (the up-down direction: the first direction), and an external connection terminal (not shown) connected to the other end of the wire, one end of which is connected to the load, is inserted into the external connection terminal insertion space 2512. In the present embodiment, the external connection terminal (not shown) is also inserted into the accommodation space 251 (the external connection terminal insertion space 2512) from the lower side (the other side) in the Z direction (the up-down direction: the first direction).

[0057] When the relays 331 and 451 are inserted into the accommodation space 251 from the upper side in the Z direction (one side in the first direction), the strip-shaped terminals 3212, 3222, 3223, and 443 and the external connection terminals are electrically connected to the relays 331 and 451. Thus, the power source 8 and the battery 6 are electrically connected to the load (not shown) via the relays 331 and 451, thereby forming a circuit (power distribution circuit 3 or battery circuit 4) having a switching function.

[0058] In addition, the housing 2 includes another electronic component holding portion 26 in which a receiving space 261 for receiving and holding other electronic components 333 and 453 as the electronic components 33 and 45 is formed. In the present embodiment, the other electronic components 333 and 453 are held in the housing 2 by being inserted into the receiving space 261 from the upper side (one side) in the Z direction (up-down direction: first direction). In addition, a strip plate-shaped terminal insertion space 2611 is formed at the lower portion of the receiving space 261 in the Z direction (up-down direction: first direction). The strip plate-shaped terminal 3234 formed in the power distribution bus bar 32 and the strip plate-shaped terminal 445 formed in the battery-side power distribution bus bar 44 are inserted into the strip plate-shaped terminal insertion space 2611. In the present embodiment, the strip plate-shaped terminals 3234 and 445 are inserted into the receiving space 261 (the strip plate-shaped terminal insertion space 2611) from the lower side (the other side) in the Z direction (up-down direction: first direction). In addition, an external connection terminal insertion space 2612 is formed at a position facing the plate-shaped terminal insertion space 2611 in the lower part in the Z direction (up-down direction: first direction) of the accommodation space 261, and an external connection terminal (not shown) connected to the other end of the electric wire, one end of which is connected to the load, is inserted into the external connection terminal insertion space 2612. In the present embodiment, the external connection terminal (not shown) is also inserted into the accommodation space 261 (external connection terminal insertion space 2612) from the lower side (the other side) in the Z direction (up-down direction: first direction).

[0059] When the other electronic components 333 and 453 are inserted into the accommodation space 261 from the upper side in the Z direction (one side in the first direction), the strip-shaped terminals 3234 and 445 and the external connection terminals are electrically connected to the other electronic components 333 and 453. Thus, the power source 8 and the battery 6 are electrically connected to the load (not shown) via the other electronic components 333 and 453. Thus, a circuit (power distribution circuit 3 or battery circuit 4) having various functions (functions provided in the other electronic components 333 and 453) can be formed.

[0060] The housing 2 also includes a power distribution unit holding portion 27 in which a receiving space 271 is formed for receiving and holding a multi-fuse unit (power distribution unit) 34 as electronic components 33 and 45. In the present embodiment, the multi-fuse unit 34 is held in the housing 2 by being inserted into the receiving space 271 from the upper side (one side) in the Z direction (up and down direction: the first direction). The multi-fuse unit 34 is a component formed by unitizing a plurality of fuse parts (fuse parts) 3413. The electric wire 91 can be electrically connected via each fuse part (fuse part) 3413 in a state where it is inserted into the receiving space 271 and held in the housing 2. The permissible current value of the fuse part (fuse part) 3413 is greater than the permissible current value of the conventional fuse (fuses 332 and 452), and therefore the electric wire 91 in which a relatively large current is supplied can be connected.

[0061] In the present embodiment, the power distribution circuit component 30 includes a plurality of wire connection bolts 35 to which the wires 91 can be connected, and the housing 2 includes a power connection bolt holding portion 28 in which an accommodation space 281 for accommodating and holding the wire connection bolts 35 is formed. In the present embodiment, eight power connection bolt holding portions 28 are formed to be arranged in the Y direction (width direction: second direction), and one wire connection bolt 35 is held and accommodated in each power connection bolt holding portion 28. Each power connection bolt holding portion 28 is provided with a partition wall 282 that ensures an insulation distance of the wires 91 connected to the wire connection bolts 35.

[0062] The wire connection bolt 35 is held in the housing 2 by being inserted into the accommodation space 281 from the lower side (the other side) in the Z direction (the up-down direction: the first direction). Specifically, in the accommodation space 281, a head accommodation space 2811 opening downward is formed, and the head 351 of the wire connection bolt 35 is accommodated and held in the head accommodation space 2811. When the head 351 of the wire connection bolt 35 is accommodated and held in the head accommodation space 2811 from below, the shaft 352 of the wire connection bolt 35 protrudes forward in the X direction (the front-rear direction: the third direction).

[0063] In addition, in the present embodiment, the accommodation space 281 is formed below the accommodation space 271 in the Z direction (up-down direction: first direction). When the multi-fuse unit 34 is held in the housing 2, the load connecting portion 3414 of the multi-fuse unit 34 is inserted into the accommodation space 281. Thus, the load connecting portion 3414 is electrically connected to the shaft 352 of the wire connecting bolt 35.

[0064] As described above, the power circuit component 30 includes the power terminal block 31 having the power bolt (power terminal) 312 , and the power terminal block 31 includes the base 311 for holding the power bolt (power terminal) 312 .

[0065] Specifically, Fig.14 As shown, the base 311 is substantially in the shape of a rectangular parallelepiped, and a head receiving space 3111 for receiving and holding a head 3121 of a power supply bolt (power supply terminal) 312 is formed in the base 311 so that the head receiving space 3111 is open on one side in the Y direction (width direction: second direction). When the head 3121 of the power supply bolt (power supply terminal) 312 is received and held in the head receiving space 3111 from the one side, the shaft 3122 in the power supply bolt (power supply terminal) 312 protrudes upward in the Z direction (up-down direction: first direction). By connecting the wire 81 to the shaft 3122, the power supply 8 is electrically connected to the power distribution circuit component 30 via the wire 81.

[0066] The power distribution circuit component 30 includes a power distribution bus bar 32 electrically connected to a power bolt (power terminal) 312. Fig.13 As shown, in this embodiment, the power distribution busbar 32 includes a first power distribution busbar 321, a second power distribution busbar 322, and a third power distribution busbar 323. These power distribution busbars can be formed of, for example, a metal material having conductivity and rigidity. In this embodiment, each power busbar is formed by stamping a single conductive metal plate to form the outer shape of the material into a predetermined shape and appropriately applying plastic processing such as bending processing to the stamped workpiece.

[0067] The first power distribution bus bar 321 has a connection piece 3211 connected to the power bolt (power terminal) 312, and a through hole 32111 is formed in the connection piece 3211. The first power distribution bus bar 321 is electrically connected to the power bolt (power terminal) 312 by inserting the shaft 3122 of the power bolt (power terminal) 312 into the through hole 32111. In addition, the first power distribution bus bar 321 has a plate-shaped terminal 3212, and a relay 331 as an electronic component 33 is electrically connected to the plate-shaped terminal 3212.

[0068] The second power distribution busbar 322 has a connection piece 3221 connected to the power bolt (power terminal) 312, and a through hole 32211 is formed in the connection piece 3221. The second power distribution busbar 322 is electrically connected to the power bolt (power terminal) 312 by inserting the shaft 3122 of the power bolt (power terminal) 312 into the through hole 32211. In addition, the second power distribution busbar 322 has a plate-shaped terminal 3222, and a relay 331 as an electronic component 33 is electrically connected to the plate-shaped terminal 3222. In addition, the second power distribution busbar 322 has a tuning fork terminal 3223, and a fuse 332 as an electronic component 33 is electrically connected to the tuning fork terminal 3223.

[0069] In addition, the third power distribution bus bar 323 has a one-side connection piece 3231 connected to the power bolt (power terminal) 312, and a through hole 32311 is formed in the one-side connection piece 3231. By inserting the shaft 3122 of the power bolt (power terminal) 312 into the through hole 32311, the third power distribution bus bar 323 is electrically connected to the power bolt (power terminal) 312.

[0070] In addition, the third power distribution bus bar 323 has another side connection piece 3232 connected to the wire connection bolt 35, and a cutout 32321 opening downward is formed in the other side connection piece 3232. The third power distribution bus bar 323 is electrically connected to the wire connection bolt 35 by inserting the shaft 352 of the wire connection bolt 35 into the cutout 32321. At this time, the power connection part 3411 of the multi-fuse unit 34 is also electrically connected to the wire connection bolt 35. Therefore, the current flowing through the third power distribution bus bar 323 is introduced into the multi-fuse unit 34 via the other side connection piece 3232. Then, the current flowing through the multi-fuse unit 34 is distributed to each wire connection bolt 35 through each fuse part 3413.

[0071] Furthermore, the third power distribution bus bar 323 has a plate-shaped terminal 3233, and the relay 331 as the electronic component 33 is electrically connected to the plate-shaped terminal 3233. Furthermore, the third power distribution bus bar 323 has a plate-shaped terminal 3234, and other electronic components 333 are electrically connected to the plate-shaped terminal 3234.

[0072] As described above, the battery circuit component 40 includes the battery circuit terminal block 41. The battery circuit terminal block 41 includes the first bolt (battery connection terminal) 412 electrically connected to the battery 6 via the electric wire 61 and the second bolt (load connection terminal) 413 connected to the load 7 via the electric wire 71. In addition, the battery circuit terminal block 41 includes a base 411 for holding the first bolt (battery connection terminal) 412 and the second bolt (load connection terminal) 413.

[0073] Specifically, Fig.14 As shown, the base 411 is roughly rectangular. A first head accommodating space 4111 for accommodating and holding the head 4121 of the first bolt (battery connection terminal) 412 is formed in the base 411, so that the first head accommodating area 4111 is open on one side of the Y direction (width direction: second direction). In addition, a second head accommodating space 4112 for accommodating and holding the head 4131 of the second bolt (battery connection terminal) 413 is formed in the base 411, so that the second head accommodating space 4112 is open on one side of the Y direction (width direction: second direction). When the head 4121 of the first bolt (battery connection terminal) 412 is accommodated and held in the first head accommodating space 4111 from this side, the shaft 4122 of the first bolt (battery connection terminal) 412 protrudes upward in the Z direction (up and down direction: first direction). Likewise, when the head 4131 of the second bolt (load connection terminal) 413 is received and held in the second head receiving space 4112 from the one side, the shaft 4132 of the second bolt (load connection terminal) 413 protrudes upward in the Z direction (up-down direction: first direction). By connecting the electric wire 61 to the shaft 4122 of the first bolt (battery connection terminal) 412, the battery 6 is electrically connected to the battery circuit component 40 via the electric wire 61. In addition, by connecting the electric wire 71 to the shaft 4132 of the second bolt (load connection terminal) 413, the load 7 is electrically connected to the battery circuit component 40 via the electric wire 71.

[0074] Furthermore, in the present embodiment, the battery circuit section 40 includes a battery-side power distribution circuit for distributing power supplied from the battery 6. That is, the battery circuit 4 is configured to have a power distribution function. The battery circuit 4 may not have a power distribution function.

[0075] In this embodiment, if Fig.13 As shown, the battery circuit component 40 includes a battery side power distribution bus bar 44 electrically connected to the second bolt (load connection terminal) 413. The battery side power distribution bus bar 44 can be formed of, for example, a metal material having conductivity and rigidity. In the present embodiment, the battery side power distribution bus bar 44 is formed by stamping a single conductive metal plate to form the outer shape of the material into a predetermined shape and appropriately applying plastic processing such as bending processing to the stamped workpiece.

[0076] The battery side power distribution bus bar 44 has a one side connection piece 441 connected to the second bolt (load connection terminal) 413, and a through hole 4411 is formed in the one side connection piece 441. By inserting the shaft 4132 of the second bolt (load connection terminal) 413 into the through hole 4411, the battery side power distribution bus bar 44 is electrically connected to the second bolt (load connection terminal) 413.

[0077] In addition, the battery side power distribution bus bar 44 has the other side connection piece 442 connected to the wire connection bolt 35, and a cutout 4421 opening downward is formed in the other side connection piece 442. By inserting the shaft 352 of the wire connection bolt 35 into the cutout 4421, the battery side power distribution bus bar 44 is electrically connected to the wire connection bolt 35. At this time, the power connection part 3411 of the multi-fuse unit 34 is also electrically connected to the wire connection bolt 35. Thus, the current flowing through the battery side power distribution bus bar 44 is introduced into the multi-fuse unit 34 via the other side connection piece 442. The current flowing through the multi-fuse unit 34 is distributed to each wire connection bolt 35 through each fuse part 3413. In this embodiment, the wire connection bolt 35 connected to the other side connection piece 442 is different from the wire connection bolt 35 connected to the other side connection piece 3232.

[0078] In addition, the battery side power distribution bus bar 44 has a plate-shaped terminal 443, and a relay 451 as an electronic component 45 is electrically connected to the plate-shaped terminal 443. In addition, the battery side power distribution bus bar 44 has a tuning fork terminal 444, and a fuse 452 as an electronic component 45 is electrically connected to the tuning fork terminal 444. In addition, the battery side power distribution bus bar 44 has a plate-shaped terminal 445, and other electronic components 453 are electrically connected to the plate-shaped terminal 445 (see Figures 11 to 13 ).

[0079] As described above, the battery circuit component 40 includes the battery circuit bus bar 42 for electrically connecting the first bolt (battery connection terminal) 412 and the second bolt (load connection terminal) 413 .

[0080] Next, a specific configuration of the multi-fusible link unit 34 and a method of inserting the multi-fusible link unit 34 into the housing 2 will be described.

[0081] The multi-fuse unit 34 is a component inserted and held in the accommodation space 271, and is unitized as one component, and the accommodation space 271 is opened on the upper side (one side) in the Z direction (up and down direction: the first direction). Thus, a plurality of fuses (fuse parts 3413) can be inserted and held together in the housing 2. In the present embodiment, the multi-fuse unit 34 moves from the upper side of the housing 2 to the lower side of the housing 2 in a relative manner, and thus it is accommodated in the accommodation space 271 and inserted and held in the housing 2.

[0082] like Figures 15 to 22As shown, the multi-fuse unit 34 includes a bus bar 341, which has a power connection portion 3411 and a plurality of load connection portions 3414 and is capable of distributing power. The multi-fuse unit 34 also includes: a plurality of fuse portions 3413 inserted between the power connection portion 3411 and the load connection portion 3414; and a cover 342 for holding the bus bar 341.

[0083] In the present embodiment, the bus bar 341 is formed by punching a single conductive metal plate to form the outer shape of the material into a predetermined shape and appropriately applying plastic working such as bending working to the punched workpiece. A plurality of fusible link portions 3413 are formed in the bus bar 341 .

[0084] Thus, the power connection part 3411, the multiple load connection parts 3414, and the multiple fuse parts 3413 are formed only by forming the bus bar 341. Thus, it is not necessary to attach each fuse to the bus bar for unitization, thereby reducing the number of components and reducing costs. In addition, by forming multiple fuse parts 3413 in one plate-shaped bus bar 341, the bus bar 341 having the power connection part 3411, the multiple load connection parts 3414, and the multiple fuse parts 3413 can be obtained at a lower cost. In addition, the thickness of the multi-fuse unit 34 can be reduced.

[0085] like Fig.21 and Fig. 22 As shown, eight connection pieces are formed in the bus bar 341, and each connection piece is electrically connected to the wire connection bolt 35. Therefore, in the present embodiment, the bus bar 341 is provided with eight load connection parts 3414. In the present embodiment, a notch 34141 is formed in each load connection part 3414, and the bus bar 341 is electrically connected to the wire connection bolt 35 by inserting the shaft 352 of the wire connection bolt 35 into the notch 34141.

[0086] Furthermore, among the eight load connection parts 3414, the two load connection parts 3414 located at the center in the Y direction are electrically connected to the wire connection bolt 35 connected to the other side connection piece 442 and the wire connection bolt 35 connected to the other side connection piece 3232, respectively. Thus, the two load connection parts 3414 located at the center in the Y direction also serve as the power connection part 3411 into which the current is introduced when the power is distributed by the multi-fuse unit 34. Thus, in the present embodiment, the multi-fuse unit 34 is configured to distribute the current supplied from the battery 6 and to distribute the current supplied from the power source 8. Thus, the cutouts 34141 of the two load connection parts 3414 also serving as the power connection part 3411 correspond to the cutouts 34111 of the power connection part 3411.

[0087] In the bus bar 341, eight load connection parts 3414 are connected by a connection part 3412, and a fuse part (fuse part) 3413 is formed between the load connection part 3414 and the connection part 3412. Each fuse part (fuse part) 3413 has a fuse body 34131, and when a current exceeding a predetermined value is supplied to each fuse part (fuse part) 3413, the fuse body 34131 is heated and melted.

[0088] Meanwhile, the cover 342 has a cover body 3421, and the bus bar 341 is held in the cover body 3421 in a state where the plurality of fusible link parts 3413 are covered by the cover body 3421. In the present embodiment, the cover body 3421 has a frame 34211 for holding the connection part of the bus bar 341 and the base end side of each load connection part 3414; and a window 34212 attached to the frame 34211 and covering the fusible link part 3413. In the present embodiment, the window 34212 is formed of a transparent or translucent resin, and the fusible link part 3413 is visible in a state where the cover 342 is attached to the bus bar 341. In addition, a cutout 213 is formed on the front wall 21 (peripheral wall 211) of the wall 21 defining the accommodation space 271 of the housing 2, and thus the fusible link part 3413 can be seen even in a state where the multiple fuse unit 34 is accommodated in the accommodation space 271.

[0089] The cover body 3421 has an approximately thin plate shape having a thin thickness in the X direction, and is formed to have a symmetrical shape that is approximately rotated twice with respect to an imaginary line L1 extending in the Z direction. In addition, the cover body 3421 has an approximately planar symmetrical shape with respect to a first imaginary plane P1 that is a plane orthogonal to the Y direction, and also has an approximately planar symmetrical shape with respect to a second imaginary plane P2 that is a plane orthogonal to the X direction.

[0090] By attaching the above-mentioned cover 3421 to the bus bar 341, the main body 340 (the portion of the multi-fuse unit 34 other than the protrusion 3422 described later) is formed. In the present embodiment, the main body 340 is also formed to have a symmetrical shape that is rotated approximately twice with respect to the imaginary line L1 extending in the Z direction. In addition, the main body 340 has a shape that is approximately plane-symmetrical with respect to the first imaginary plane P1, which is a plane orthogonal to the Y direction, and also has a shape that is approximately plane-symmetrical with respect to the second imaginary plane P2, which is a plane orthogonal to the X direction. That is, the portion exposed from the cover 3421 of the bus bar 341 (the eight load connection portions 3414) also has a symmetrical shape that is rotated approximately twice with respect to the imaginary line L1, and has a shape that is approximately plane-symmetrical with respect to the first imaginary plane P1.

[0091] Therefore, even when the main body 340 is rotated 180 degrees around the Z direction (when reversed from the normal position to the reverse position and from the reverse position to the normal position), the external appearance of the main body 340 is a shape that can be inserted into the accommodation space 271 .

[0092] In the present embodiment, the permissible current value of the fusible link 3413 is set according to the electric wire 91 to be connected, and there are fusible link 3413 with different permissible current values ​​among the plurality of fusible link 3413. When the fusible link 3413 has the same shape, the permissible current value is also the same, and when the fusible link 3413 has different shapes, the permissible current value is also different. This makes it possible to check the permissible current value of each fusible link 3413 by visually observing the shape of the fusible link 3413.

[0093] Furthermore, in the present embodiment, as described above, the eight load connecting portions 3414 have a symmetrical shape rotated twice with respect to the imaginary line L1 extending in the Z direction, and have a plane symmetrical shape with respect to the first imaginary plane P1 which is a plane orthogonal to the Y direction.

[0094] In contrast, the fuse part 3413 has an asymmetric shape with respect to the imaginary line L1 and also has an asymmetric shape with respect to the first imaginary plane P1. Therefore, the arrangement order of the allowable current values ​​of the fuse part 3413 is different between the normal position and the reverse position (see Fig.21 and Fig. 22 ).

[0095] As described above, when a plurality of fuse parts 3413 whose arrangement order of the allowable current value is changed when the plate-shaped bus bar 341 is reversed are formed, multiple fuse units 34 corresponding to two arrangement orders can be formed. Specifically, two types of multiple fuse units 34 can be formed: Fig.21 The state shown is that the multi-fuse unit 34 is in the normal position and Fig. 22 The state shown is that of the multi-fuse unit 34 in a normal position.

[0096] Here, in the present embodiment, it is possible to suppress the multiple-fuse unit 34 from being erroneously inserted into the housing 2 , and also it is possible to further improve the insertion operation of the multiple-fuse unit 34 into the accommodation space 271 .

[0097] Specifically, the protrusion 3422 is formed on at least one of the main body 340 and the power distribution unit holding portion (holding portion) 27. In the present embodiment, at both ends in the Y direction of the lower end of the cover body 3421, a pair of protrusions 3422 are formed to protrude from the rear half in the X direction to the outside in the Y direction.

[0098] The groove 2712 is formed at least in the power distribution unit holding portion (holding portion) 27 which is the other of the main body 340 and the power distribution unit holding portion (holding portion) 27 (see Fig.23 and Fig.24 The grooves 2712 are formed in pairs to communicate with both ends in the Y direction of the main body accommodating space 2711 into which the main body 340 is inserted at the rear side in the X direction. When the multi-fuse unit 34 is inserted into the accommodating space 271 in a state of a normal position, the protrusion 3422 is inserted into the groove 2712.

[0099] In addition, a limiting wall 214 (see FIG. Fig.25 ), when the multi-fuse unit 34 is inserted into the accommodation space 271 in the state of the reverse position, the limiting wall 214 interferes with the protrusion 3422. The limiting wall 214 is formed on the wall 21 (peripheral wall 211) that defines the accommodation space 271, and each limiting wall 214 is formed in front of the opening 27121 of the pair of grooves 2712 so as to be arranged in parallel with the opening 27121 in the X direction.

[0100] A protrusion side inclined surface 34221 is formed in the protrusion 3422, and when the multi-fuse unit 34 is inserted into the accommodating space 271 at the normal position, the protrusion side inclined surface 34221 can guide the protrusion 3422 into the groove 2712 by contacting the limiting wall 214. Specifically, the protrusion side inclined surface 34221 is formed to be inclined rearward and downward to the front of the lower end of the protrusion 3422.

[0101] As described above, in the present embodiment, the multiple fuse unit 34 has the main body 340 formed to have a shape symmetrically rotated approximately twice with respect to the imaginary line L1 extending in the Z direction (up-down direction: first direction).

[0102] The protrusion 3422 is formed on the main body 340. In addition, a groove 2712 and a limiting wall 214 are formed on the power distribution unit holding portion (holding portion) 27, and when the multi-fuse unit 34 is normally inserted, the protrusion 3422 can be inserted into the groove 2712, and when the multi-fuse unit 34 is reversely inserted, the limiting wall 214 interferes with the protrusion 3422.

[0103] That is, the body 340 has a shape that can be inserted in reverse, and when the multi-fuse unit 34 is inserted in reverse, the protrusion 3422 interferes with the restriction wall 214. Thus, the multi-fuse unit 34 cannot be accommodated in the accommodation space 271. When the multi-fuse unit 34 is normally inserted, the protrusion 3422 is inserted into the groove 2712 without interfering with the restriction wall 214, and thus the multi-fuse unit 34 can be accommodated in the accommodation space 271. Here, "the multi-fuse unit 34 is normally inserted" means that the multi-fuse unit 34 is inserted into the accommodation space 271 in a normal state (a state of a normal position). On the contrary, "the multi-fuse unit 34 is reversely inserted" means that the multi-fuse unit 34 is inserted into the accommodation space 271 in a state (a state of a reverse position) in which the multi-fuse unit 34 is rotated 180 degrees around the axis of the Z direction (up and down direction: a first direction) relative to the normal position.

[0104] As described above, in the electrical connection structure 1 according to the present embodiment, the main body 340 has a symmetrical shape that is rotated approximately twice with respect to the imaginary line L1 extending in the Z direction (up-down direction: first direction), thereby suppressing the shape of the main body 340 from becoming complicated. This makes it possible to manufacture the multiple fuse unit 34 at a lower cost and more easily.

[0105] In addition, the body 340 has a shape that can be inserted in reverse, and the protrusion 3422, the limiting wall 214 and the groove 2712 limit the reverse insertion of the multi-fuse unit 34. Therefore, even if the multi-fuse unit 34 has a shape that can be inserted in reverse, the multi-fuse unit 34 can be more reliably suppressed from being inserted in reverse.

[0106] The plurality of fuse parts 3413 may have different allowable current values. When the fuse parts 3413 have different allowable current values, the arrangement order of the allowable current values ​​may be different between the state where the multi-fuse unit 34 is in the normal position and the state where the multi-fuse unit 34 is in the reverse position.

[0107] Therefore, in the case where the main body 340 has a symmetrical shape that is rotated approximately twice in appearance and the arrangement relationship of the plurality of fuse parts 3413 is asymmetrical, if the multi-fuse unit 34 can be inserted in reverse, an electric wire that does not correspond to the fuse part 3413 may be mistakenly connected. For example, an electric wire with a low allowable current value may be mistakenly connected to a fuse part 3413 with a high allowable current value. Thus, if an electric wire with a low allowable current value is connected to a fuse part 3413 with a high allowable current value, even if an overload current is supplied to the electric wire, the fuse part 3413 may not melt, which may cause the overload current to be continuously supplied to the electric wire.

[0108] However, in the case of adopting the electrical connection structure 1 described in this embodiment, even when the main body 340 has a shape that can be inserted in reverse, the multi-fuse unit 34 can be prevented from being inserted in reverse. This makes it possible to more reliably prevent the wrong connection of the wire that does not correspond to the fusible element part 3413.

[0109] Furthermore, in the electrical connection structure 1 described in the present embodiment, a protrusion side inclined surface 34221 capable of guiding the protrusion 3422 into the groove 2712 is formed in the protrusion 3422. That is, the protrusion side inclined surface 34221 is formed in the protrusion 3422, and when the multi-fuse unit 34 is inserted into the accommodation space 271 in a state of a normal position, the protrusion side inclined surface 34221 can guide the protrusion 3422 into the groove 2712 by contacting with the restriction wall 214. Thus, the multi-fuse unit 34 can be more easily accommodated in the accommodation space 271.

[0110] As described above, the electrical connection structure 1 according to the present embodiment enables the multi-fuse unit 34 to be manufactured at a lower cost and more easily, and can suppress erroneous insertion of the multi-fuse unit 34 into the housing 2 and can further improve the insertion operation.

[0111] Furthermore, in the present embodiment, a limiting wall side inclined surface 2141 that is inclined forward and downward in the X direction is formed on the limiting wall 214. Thus, when the multi-fuse unit 34 is inserted into the accommodating space 271 in the state of the reverse position, the protrusion side inclined surface 34221 contacts the limiting wall side inclined surface 2141, thereby enabling the protrusion 3422 to move in a direction away from the groove 2712.

[0112] That is, the restricting wall side inclined surface 2141 is formed on the restricting wall 214 , and when the multi-fusible link unit 34 is reversely inserted, the protrusion 3422 moves to leave the groove 2712 by bringing the protrusion side inclined surface 34221 into contact with the restricting wall side inclined surface 2141 .

[0113] Therefore, when the protrusion 3422 interferes with the restriction wall 214 by inserting the multiple fuse unit 34 in the reverse direction, the protrusion 3422 can be moved to leave the groove 2712 by moving the protrusion side inclined surface 34221 along the restriction wall side inclined surface 2141. By moving the protrusion 3422 to leave the groove 2712, it is possible to more reliably suppress the protrusion 3422 from being erroneously inserted into the groove 2712 when the multiple fuse unit 34 is reversely inserted. As a result, when the multiple fuse unit 34 is reversely inserted, it is possible to prevent the multiple fuse unit 34 from being forcibly pushed into the accommodation space 271. Thus, it is possible to more reliably suppress the multiple fuse unit 34 from being erroneously inserted into the housing 2.

[0114] In the present embodiment, when the multi-fusible link unit 34 is inserted into the accommodation space 271 in the state of the reverse position, the protrusion-side inclined surface 34221 and the restriction-wall-side inclined surface 2141 are in surface contact with each other.

[0115] This makes it possible to disperse the stress generated when the protrusion 3422 caused by the reverse insertion of the multi-fusible link unit 34 interferes with the limiting wall 214. That is, this makes it possible to suppress the partial concentration of the stress generated when the protrusion 3422 caused by the reverse insertion of the multi-fusible link unit 34 interferes with the limiting wall 214. Thus, when the multi-fusible link unit 34 is reversely inserted, it is possible to more reliably suppress the protrusion 3422 and the limiting wall 214 from being damaged.

[0116] In this embodiment, a partition wall side inclined surface 2121 inclined forward and downward is also formed on the rear wall 21 (partition wall 212) that defines the accommodating space 271, and the partition wall side inclined surface 2121 also has the function of guiding the protrusion 3422 into the groove 2712.

[0117] Furthermore, the present embodiment enables the electrical connection structure 1 compatible with various vehicle specifications to be provided at a low cost. That is, the electrical connection structure 1 capable of coping with the presence or absence of the rescue terminal 43 can be manufactured at a low cost.

[0118] Specifically, the battery circuit components 40 other than the power distribution circuit components 30 and the battery circuit bus bar 42 are held in the housing 2, thereby forming Figure 5 and Figure 6 The base unit 10 is shown.

[0119] The base unit 10 is used regardless of the presence or absence of the rescue terminal 43. That is, the base unit 10 can be used even in the case of an electrical connection structure 1 without the rescue terminal 43 or in the case of an electrical connection structure 1 provided with the rescue terminal 43. Figure 5 and Figure 6 The base unit 10 is shown. This enables as many common components as possible to be used.

[0120] The battery circuit busbar 42 includes a common busbar 421 without the rescue terminal 43 and a busbar 422 with the rescue terminal 43. Therefore, in the case of the electrical connection structure 1 without the rescue terminal, the common busbar 421 is usually installed on the first bolt (battery connection terminal) 412. On the contrary, in the case of the electrical connection structure 1 provided with the rescue terminal 43, at least the busbar 422 with the rescue terminal is installed on the first bolt (battery connection terminal) 412.

[0121] Therefore, in the present embodiment, at least one of the normal bus bar 421 and the bus bar with rescue terminal 422 is selectively mounted to the first bolt (battery connection terminal) 412 .

[0122] That is, the bus bar (normal bus bar 421) without the rescue terminal 43 is mounted on the first bolt (battery connection terminal) 412 provided in the base unit 10, and thus it is possible to obtain the electrical connection structure 1 without the rescue terminal 43. Thus, when it is not necessary to provide the rescue terminal 43 in the electrical connection structure 1, it is possible to respond to a request to use the electrical connection structure 1 without the rescue terminal 43.

[0123] On the contrary, the bus bar having the rescue terminal 43 (the bus bar with the rescue terminal 422) is mounted on the first bolt (battery connection terminal) 412 provided in the base unit 10, and thus it is possible to obtain the electrical connection structure 1 provided with the rescue terminal 43. This makes it possible to cope with the situation where the rescue terminal 43 needs to be provided in the electrical connection structure 1.

[0124] Thus, in the electrical connection structure 1 described in the present embodiment, the base unit 10 is used as a common component. By selectively installing the ordinary bus bar 421 and / or the bus bar 422 with the rescue terminal to the first bolt (battery connection terminal) 412 provided in the base unit 10, the presence or absence of the rescue terminal 43 can be dealt with.

[0125] That is, by simply preparing several types of bus bars that can be selectively mounted on the first bolts (battery connection terminals) 412 provided in the base unit 10 , it is possible to obtain the electrical connection structure 1 that can cope with the presence or absence of the rescue terminal 43 .

[0126] Therefore, compared with the case of separately preparing a new case or providing the rescue terminal 43 in the power distribution circuit component 30, the cost required for manufacturing the electrical connection structure 1 capable of coping with the presence or absence of the rescue terminal 43 can be reduced.

[0127] Thus, the configuration described in the present embodiment enables the electrical connection structure 1 compatible with various vehicle specifications to be provided at a low cost.

[0128] Furthermore, in the present embodiment, the base unit 10 includes a second bolt (load connection terminal) 413 which is electrically connected to the load 7 so as to constitute a part of the battery circuit 4 , and the second bolt 413 is held in the housing 2 .

[0129] The common bus bar 421 is a bus bar mounted on the first bolt (battery connection terminal) 412 and the second bolt (load connection terminal) 413 , and can electrically connect the first bolt (battery connection terminal) 412 and the second bolt (load connection terminal) 413 .

[0130] Specifically, the common bus bar 421 has a first through hole 4211 and a second through hole 4212, a first bolt (battery connection terminal) 412 is inserted into the first through hole 4211, and a second bolt (load connection terminal) 413 is inserted into the second through hole 4212. When the common bus bar 421 is installed, the first bolt (battery connection terminal) 412 is inserted into the first through hole 4211, and the second bolt (load connection terminal) 413 is inserted into the second through hole 4212. Thus, the common bus bar 421 is installed to the first bolt (battery connection terminal) 412 and the second bolt (load connection terminal) 413 to electrically connect the first bolt (battery connection terminal) 412 and the second bolt (load connection terminal) 413. A frame-shaped locking piece 4213 is formed in the common bus bar 421, and when the common bus bar 421 is installed on the base unit 10, the locking piece 4213 is locked to the locking protrusion 4113 formed on the base 411.

[0131] The bus bar 422 with a rescue terminal includes a general bus bar portion 4221 in a substantially rectangular plate shape and a rescue terminal portion 4222 which is continuously connected to the general bus bar portion 4221 and serves as a rescue terminal 43. Here, the general bus bar portion 4221 is a portion which is mounted on the first bolt (battery connection terminal) 412 and the second bolt (load connection terminal) 413 and is capable of electrically connecting the first bolt (battery connection terminal) 412 to the second bolt (load connection terminal) 413. In the present embodiment, the general bus bar portion 4221 has a first through hole 42211 and a second through hole 42212, the first bolt (battery connection terminal) 412 is inserted into the first through hole 42211, and the second bolt (load connection terminal) 413 is inserted into the second through hole 42212. When the ordinary bus bar portion 4221 is installed, the first bolt (battery connection terminal) 412 is inserted into the first through hole 42211, and the second bolt (load connection terminal) 413 is inserted into the second through hole 42212. Thus, the ordinary bus bar portion 4221 is installed to the first bolt (battery connection terminal) 412 and the second bolt (load connection terminal) 413 to electrically connect the first bolt (battery connection terminal) 412 with the second bolt (load connection terminal) 413. A frame-shaped locking piece 42213 is also formed in the ordinary bus bar portion 4221, and when the ordinary bus bar portion 4221 is installed on the base unit 10, the locking piece 42213 is locked to the locking protrusion 4113 formed on the base 411.

[0132] The rescue terminal portion 4222 is formed to protrude upward from the normal bus bar portion 4221 , and the battery 6 can be charged from another vehicle by connecting a clip portion of a booster cable to the rescue terminal portion 422 in a state where a rescue terminal cover 5 described later is opened.

[0133] In addition, the general bus bar 421 or the bus bar with rescue terminal 422 is selectively installed on the first bolt (battery connection terminal) 412 and the second bolt (load connection terminal) 413. That is, when any electrical connection structure 1 is used, only one of the general bus bar 421 and the bus bar with rescue terminal 422 is installed on the base unit 10.

[0134] Thus, the electrical connection structure 1 provided with the rescue terminal 43 can be obtained simply by mounting the bus bar 422 with the rescue terminal to the first bolt 412 and the second bolt 413 provided in the base unit 10 .

[0135] That is, in order to provide the rescue terminal 43 in the electrical connection structure 1 , it is no longer necessary to mount both the ordinary bus bar 421 and the bus bar with the rescue terminal 422 to the first bolt (battery connection terminal) 412 and the second bolt (load connection terminal) 413 .

[0136] This makes it possible to simplify the manufacturing process of the electrical connection structure 1 provided with the rescue terminal 43 , thereby making it easier to obtain the electrical connection structure 1 provided with the rescue terminal 43 .

[0137] In the present embodiment, in the state of the base unit 10, the first bolt (battery connection terminal) 412 and the second bolt (load connection terminal) 413 are electrically insulated from each other. Thus, in order to obtain an electrical connection structure 1 without a rescue terminal 43, it is necessary to install a normal bus bar 421 on the first bolt (battery connection terminal) 412 and the second bolt (load connection terminal) 413 provided in the base unit 10. On the contrary, in order to obtain an electrical connection structure 1 provided with a rescue terminal 43, it is necessary to install a bus bar 422 with a rescue terminal on the first bolt (battery connection terminal) 412 and the second bolt (load connection terminal) 413 provided in the base unit 10.

[0138] Thus, in this embodiment, either the ordinary bus bar 421 or the bus bar with rescue terminal 422 is mounted on the first bolt (battery connection terminal) 412 and the second bolt (load connection terminal) 413 to cope with the presence or absence of the rescue terminal 43 .

[0139] Thus, the configuration described in the present embodiment enables checking not only the presence or absence of the rescue terminal 43 but also the presence or absence of electrical connection between the first bolt 412 and the second bolt 413 simply by checking the type of the installed battery circuit bus bar 42 .

[0140] Furthermore, in the present embodiment, when the bus bar 422 with rescue terminals is mounted on the first bolt (battery connection terminal) 412 , the electrical connection structure 1 is provided with a rescue terminal cover 5 capable of covering the rescue terminal 43 in a switchable manner.

[0141] This makes it possible to protect the unused rescue terminal 43 by the rescue terminal cover 5 , and also more reliably prevent fingers, tools, etc. from contacting the rescue terminal 43 when the rescue terminal 43 is not in use.

[0142] In this embodiment, the rescue terminal cover 5 is rotatably attached to the housing 2. Specifically, the rescue terminal cover 5 is provided with a cover body 51 for covering the rescue terminal 43, a shaft 52 held by a bearing 215 and a shaft holding protrusion 216 formed in the housing 2, and a shaft holding portion 53 for holding the shaft 52. The rescue terminal cover 5 can be rotatably attached to the housing 2. Figure 1 The closed state shown is the same as Fig.29 Rotate between the open positions shown.

[0143] Thereby, the opening and closing operation of the rescue terminal 43 by the rescue terminal cover 5 can be performed more easily. Furthermore, by attaching the rescue terminal cover 5 to the housing 2, the loss of the rescue terminal cover 5 when the rescue terminal 43 is used can be more reliably suppressed.

[0144] Figure 27 to Figure 29 As an example, the method of attaching the rescue terminal cover 5 to the housing 2 before installing the bus bar 422 with the rescue terminal is shown; however, the present embodiment is not limited thereto. For example, the rescue terminal cover 5 can be attached to the housing 2 after installing the bus bar 422 with the rescue terminal or while installing the bus bar 422 with the rescue terminal.

[0145] [Function / Effect]

[0146] Hereinafter, characteristic configurations of the electrical connection structures described in the above embodiments and the effects obtained thereof will be described.

[0147] (1) The electrical connection structure 1 described in the above embodiment includes: a housing 2 having a power distribution unit holding portion (holding portion) 27 : and a power distribution unit 34 inserted into and held in the power distribution unit holding portion (holding portion) 27 .

[0148] In addition, the power distribution unit holding portion (holding portion) 27 has an accommodation space 271 opened on the upper side (one side) in the Z direction (up-down direction: first direction). The accommodation space 271 is a space in which the power distribution unit 34 is accommodated by relatively moving the power distribution unit 34 to the lower side (the other side) in the Z direction (up-down direction: first direction) relative to the housing 2. In addition, the power distribution unit holding portion (holding portion) 27 has a wall 21 that defines the accommodation space 271.

[0149] The power distribution unit 34 has a main body 340 formed into a symmetrical shape having about two rotations with respect to an imaginary line L1 extending in the Z direction (up and down direction: first direction). The main body 340 has a bus bar 341 having a power connection portion 3411 and a plurality of load connection portions 3414, and is capable of distributing power. In addition, the main body 340 has: a plurality of fuse portions 3413 inserted between the power connection portion 3411 and the load connection portion 3414; and a cover 342 for holding the bus bar 341.

[0150] Furthermore, a protrusion 3422 is formed on at least one of the main body 340 and the power distribution unit holding portion (holding portion) 27 .

[0151] At the same time, a groove 2712 is formed on at least the other of the main body 340 and the power distribution unit holding portion (holding portion) 27, and when the power distribution unit 34 is inserted into the accommodating space 271 in the state of the normal position, the protrusion 3422 is inserted into the groove 2712. In addition, a limiting wall 214 is formed on at least the other of the main body 340 and the power distribution unit holding portion (holding portion) 27, and when the power distribution unit 34 is inserted into the accommodating space 271 in the state of the reverse position, the limiting wall 214 interferes with the protrusion 3422.

[0152] In addition, a protrusion side inclined surface 34221 is formed in the protrusion 3422 , and when the power distribution unit 34 is inserted into the accommodating space 271 in a normal position, the protrusion side inclined surface 34221 can guide the protrusion 3422 into the groove 2712 by contacting the limiting wall 214 .

[0153] As described above, in the electrical connection structure 1 described in the present embodiment, the power distribution unit 34 has the main body 340 formed to have a symmetrical shape rotated approximately twice with respect to the imaginary line L1 extending in the Z direction (up-down direction: first direction).

[0154] The protrusion 3422 is formed on the main body 340 and / or the holding portion 27. In addition, the groove 2712 and the limiting wall 214 are formed on the holding portion 27 and / or the main body 340, and when the power distribution unit 34 is normally inserted, the protrusion 3422 can be inserted into the groove 2712, and when the power distribution unit 34 is reversely inserted, the limiting wall 214 interferes with the protrusion 3422.

[0155] That is, the main body 340 has a shape that can be inserted in reverse, and when the power distribution unit 34 is inserted in reverse, the protrusion 3422 interferes with the limiting wall 214, and thus the power distribution unit 34 cannot be accommodated in the accommodation space 271. When the power distribution unit 34 is normally inserted, the protrusion 3422 is inserted into the groove 2712 without interfering with the limiting wall 214, and thus the power distribution unit 34 can be accommodated in the accommodation space 271. Here, "the power distribution unit 34 is normally inserted" means that the power distribution unit 34 is inserted into the accommodation space 271 in a normal state (a state of a normal position). In contrast, "the power distribution unit 34 is reversely inserted" means that the power distribution unit 34 is inserted into the accommodation space 271 in a state (a state of a reverse position) rotated 180 degrees about the axis of the Z direction (up and down direction: a first direction) relative to the normal position.

[0156] As described above, in the electrical connection structure 1 described in the present embodiment, the main body 340 has a symmetrical shape rotated approximately twice with respect to the imaginary line L1 extending in the Z direction (up-down direction: first direction), thereby suppressing the complication of the shape of the main body 340. This makes it possible to manufacture the power distribution unit 34 at a lower cost and more easily.

[0157] In addition, the main body 340 has a shape that can be inserted in reverse, and the protrusion 3422, the limiting wall 214 and the groove 2712 limit the reverse insertion of the power distribution unit 34. Thus, even if the power distribution unit 34 has a shape that can be inserted in reverse, the power distribution unit 34 can be more reliably prevented from being inserted in reverse.

[0158] Multiple fuse parts 3413 may have different allowable current values. When the fuse parts 3413 have different allowable current values, the order of the allowable current values ​​may be different between the state where the power distribution unit 34 is in the normal position and the state where the power distribution unit 34 is in the reverse position.

[0159] Therefore, in the case where the main body 340 has a symmetrical shape that is approximately rotated twice in appearance and the arrangement relationship of the plurality of fuse parts 3413 is asymmetrical, if the power distribution unit 34 can be inserted in reverse, an electric wire that does not correspond to the fuse part 3413 may be mistakenly connected. For example, an electric wire with a low allowable current value may be mistakenly connected to a fuse part 3413 with a high allowable current value. Thus, if an electric wire with a low allowable current value is connected to a fuse part 3413 with a high allowable current value, the fuse part 3413 may not melt even if an overload current is supplied to the electric wire, which may cause the overload current to be continuously supplied to the electric wire.

[0160] However, in the case of adopting the electrical connection structure 1 described in this embodiment, even when the main body 340 has a shape that can be inserted in reverse, the power distribution unit 34 can be prevented from being inserted in reverse. This makes it possible to more reliably prevent the wrong connection of the wire that does not correspond to the fuse part 3413.

[0161] Furthermore, in the electrical connection structure 1 described in the present embodiment, the protrusion side inclined surface 34221 is formed in the protrusion 3422, and when the power distribution unit 34 is inserted into the accommodation space 271 in the state of the normal position, the protrusion side inclined surface 34221 can guide the protrusion 3422 into the groove 2712 by contacting with the restriction wall 214. Thus, the power distribution unit 34 can be more easily accommodated in the accommodation space 271.

[0162] As described above, the electrical connection structure 1 described in the present embodiment enables the power distribution unit 34 to be manufactured at a lower cost and more easily, and suppresses the power distribution unit 34 from being erroneously inserted into the housing 2, thereby further improving the insertion operation.

[0163] (2) In addition, a limiting wall side inclined surface 2141 can be formed on the limiting wall 214, and when the power distribution unit 34 is inserted into the accommodating space 271 in the reverse position, the protrusion side inclined surface 34221 contacts the limiting wall side inclined surface 2141, and the limiting wall side inclined surface 2141 enables the protrusion 3422 to move in a direction away from the groove 2712.

[0164] That is, the limiting wall side inclined surface 2141 is formed on the limiting wall 214 , and when the power distribution unit 34 is reversely inserted, the protrusion 3422 can move away from the groove 2712 by making the protrusion side inclined surface 34221 contact with the limiting wall side inclined surface 2141 .

[0165] Therefore, when the protrusion 3422 interferes with the limiting wall 214 by inserting the power distribution unit 34 in reverse, the protrusion 3422 can be moved away from the groove 2712 by moving the protrusion side inclined surface 34221 along the limiting wall side inclined surface 2141. By moving the protrusion 3422 away from the groove 2712, it is possible to more reliably suppress the protrusion 3422 from being erroneously inserted into the groove 2712 when the power distribution unit 34 is reversely inserted. As a result, it is possible to prevent the power distribution unit 34 from being forcibly pushed into the accommodating space 271 when the power distribution unit 34 is reversely inserted, thereby more reliably preventing the power distribution unit 34 from being erroneously inserted into the housing 2.

[0166] (3) Furthermore, when the power distribution unit 34 is inserted into the accommodation space 271 in the state of the reverse position, the protrusion-side inclined surface 34221 and the restriction-wall-side inclined surface 2141 can be brought into surface contact with each other.

[0167] This makes it possible to disperse the stress generated when the protrusion 3422 interferes with the limiting wall 214 caused by the reverse insertion of the power distribution unit 34. That is, this makes it possible to suppress the partial concentration of the stress generated when the protrusion 3422 interferes with the limiting wall 214 caused by the reverse insertion of the power distribution unit 34. Thus, when the power distribution unit 34 is reversely inserted, it is possible to more reliably suppress the protrusion 3422 and the limiting wall 214 from being damaged.

[0168] (4) Furthermore, the power distribution unit may be a multi-fuse unit 34 having a plurality of fuse sections 3413 serving as fuse sections.

[0169] Thus, when the allowable current value of the plurality of fusible links (fusible link parts 3413 ) is greater than the allowable current value of the fuse 332 , the plurality of fusible links (fusible link parts 3413 ) can be inserted together and held in the housing 2 .

[0170] (5) Furthermore, a plurality of fusible link portions 3413 may be formed in the bus bar 341 .

[0171] Thus, it is not necessary to attach each fusible link to the bus bar, thereby reducing the number of components and reducing costs. In addition, by forming a plurality of fusible link portions 3413 in the bus bar 341, the thickness of the multi-fusible link unit 34 can be reduced.

[0172] [other]

[0173] Although the present embodiment has been described above, the present embodiment is not limited to the above description, and various modifications can be made within the scope of the gist of the present embodiment.

[0174] For example, in the above-mentioned embodiment, the ordinary bus bar 421 or the bus bar 422 with the rescue terminal is selectively installed; however, the present invention is not limited to this configuration, and various configurations are possible. For example, the present invention can have a configuration in which the base unit 10 includes the ordinary bus bar 421, and with this configuration, it is possible to deal with the presence or absence of the rescue terminal based on whether the bus bar 422 with the rescue terminal is installed on the first bolt (battery connection terminal) 412. In this case, the ordinary bus bar 421 and the bus bar 422 with the rescue terminal are installed, so that an electrical connection structure provided with a rescue terminal can be obtained. The base unit 10 in a state where the bus bar 422 with the rescue terminal is not installed serves as an electrical connection structure without a rescue terminal.

[0175] Furthermore, it is possible to attach the rescue terminal cover 5 directly to the rescue terminal 43 instead of attaching the rescue terminal cover 5 to the housing 2 .

[0176] Although the multi-fuse unit 34 is exemplified as the power distribution unit in the above-described embodiment, the present invention can also be applied to a configuration in which a power supply as the power distribution unit is integrally accommodated in a housing.

[0177] In addition, a protrusion can be provided on the holding portion 27, and the main body 340 can be provided with a groove and a limiting wall, the protrusion is inserted into the groove, and when the power distribution unit 34 is inserted into the accommodating space 271 in the state of the reverse position, the limiting wall interferes with the protrusion. In addition, the main body 340 can be provided with a protrusion, a groove and a limiting wall, and the groove, the limiting wall and the protrusion can be provided in the corresponding part of the holding portion. That is, a set of protrusions, grooves and limiting walls can be formed in any number at any position of the main body 340 and the holding portion 27.

[0178] Furthermore, it is possible to adopt a configuration in which the restriction wall side inclined surface 2141 is not formed on the restriction wall 214 .

[0179] Furthermore, when the power distribution unit 34 is inserted into the accommodation space 271 in the state of the reverse position, it is possible to prevent the protrusion-side inclined surface 34221 and the restriction-wall-side inclined surface 2141 from surface-contacting each other.

[0180] Furthermore, the housing 2 can be configured to hold spare parts and tools.

[0181] Furthermore, it is possible to apply the present invention to an electrical connection structure that is not intended to be compatible with various vehicle specifications.

[0182] Furthermore, the specifications (shape, size, layout, etc.) of the housing, power distribution circuit, and other details may be changed appropriately.

[0183] Although specific embodiments have been described, these embodiments are disclosed only by way of example and are not intended to limit the scope of the invention. In fact, the novel embodiments described herein may be implemented in various other forms; in addition, various omissions, substitutions, and changes in the embodiment forms described herein may be made without departing from the spirit of the invention. The attached claims and their equivalents are intended to cover such forms or modifications that fall within the scope and spirit of the invention.

Claims

1. An electrical connection structure, comprising: a housing having a retaining portion; as well as a power distribution unit, the power distribution unit being inserted into and held in the holding portion, wherein: The holding portion comprises: an accommodating space which is open at one side in a first direction and accommodates the power distribution unit by relatively moving the power distribution unit relative to the housing toward the other side in the first direction; and a wall defining the accommodation space, and The power distribution unit is provided with a main body, which includes: a bus bar having a power connection part and a plurality of load connection parts, and the bus bar is capable of distributing power; a plurality of fuse parts, the plurality of fuse parts are inserted between the power connection part and the load connection part; and a cover for holding the bus bar, The main body is formed to have a symmetrical shape rotated approximately twice with respect to an imaginary line extending in the first direction, A protrusion is formed on at least one of the main body and the holding portion, A groove and a limiting wall are formed on at least one of the main body and the holding portion, and when the power distribution unit is inserted into the accommodating space in a normal position, the protrusion is inserted into the groove, and when the power distribution unit is inserted into the accommodating space in a reverse position, the limiting wall interferes with the protrusion, and A protrusion side inclined surface is formed in the protrusion, and when the power distribution unit is inserted into the accommodation space in the state of the normal position, the protrusion side inclined surface can introduce the protrusion into the groove by contacting the restriction wall.

2. The electrical connection structure according to claim 1, wherein: A limiting wall side inclined surface is formed on the limiting wall. When the power distribution unit is inserted into the accommodating space in the inverted position, the protrusion side inclined surface contacts the limiting wall side inclined surface, and the limiting wall side inclined surface enables the protrusion to move in a direction away from the groove.

3. The electrical connection structure according to claim 2, wherein: When the power distribution unit is inserted into the accommodation space in the state of the reverse position, the protrusion-side inclined surface and the restriction-wall-side inclined surface come into surface contact with each other.

4. The electrical connection structure according to any one of claims 1 to 3, wherein: The power distribution unit is a multi-fuse unit having a plurality of fusible link parts serving as the fuse parts.

5. The electrical connection structure according to claim 4, wherein: The plurality of fusible link parts are formed in the bus bar.

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