JP6887911B2 - Electrical wiring block joints, electrical junction boxes and wire harnesses - Google Patents

Description

The present invention relates to electrical wiring block joints, electrical junction boxes and wire harnesses.

Conventionally, an electric junction box including a housing and electronic components housed in the housing is known (Patent Documents 1 to 5 below). For example, in an electrical junction box, electronic components are housed in a housing by housing an electrical wiring block in which the electronic components are housed. In this electric connection box, a plurality of electric wiring blocks may be housed in one housing, and by joining the electric wiring blocks to each other, the electronic parts of the connected electric wiring blocks are electrically connected to each other. Let me. The electronic components are electrically connected to each other using electric wires provided with terminals or connectors at both ends. In this case, each electric wiring block is also provided with a terminal or a connector for physically and electrically connecting the end side of the electric wire. Further, the electronic components can be electrically connected to each other by using a plate-shaped bus bar. For example, each electrical wiring block is provided with a plate-shaped bus bar that is electrically connected to the electronic components that it accommodates. In the electrical junction box in this case, the electronic components are electrically connected to each other by connecting the bus bars of the electrical wiring blocks that are connected to each other with a connecting member. The connecting members include, for example, a screw fixing member (male screw member and female screw member), a relay bus bar having a tuning fork terminal into which the bus bar is inserted (Patent Document 6 below), and a plate into which the bus bar is inserted. A relay bus bar having a spring-shaped clip for each bus bar (Patent Document 7 below).

Japanese Unexamined Patent Publication No. 2004-201448 Japanese Unexamined Patent Publication No. 9-308047 JP-A-2007-129790 Japanese Unexamined Patent Publication No. 2004-166322 JP-A-2002-315156 Japanese Unexamined Patent Publication No. 2012-21276 Japanese Unexamined Patent Publication No. 2011-172393

By the way, between the electronic components of the electric wiring blocks connected to each other, there is a possibility that the temperature rise may be caused by the heat generated by the energization on the energization path between them. The terminals, connecting members, and the like connecting between them are housed inside the electric wiring block, and are housed together with the electric wiring block in the housing of the electric connection box. Therefore, there is room for improvement in the conventional energization path from the viewpoint of suppressing the temperature rise.

Therefore, it is an object of the present invention to provide an electrical wiring block joint, an electrical junction box, and a wire harness that can enhance heat dissipation on an energization path that forms an electrical connection between electrical wiring blocks. ..

In order to achieve the above object, the electric wiring block joint according to the present invention includes a plurality of electric wiring blocks that electrically connect an electronic component and a bus bar inward, and two electric wires to be joined to each other. The electrical connection structure in which the flat plate-shaped electrical connection portions of the bus bars are coupled between the wiring blocks, and an insulating lid member that covers the electrical connection structure so as to be openable and closable from the outside are provided. The electrical connection structure is a coupling structure portion in which each of the electrical connection portions projecting outward from the two bonded electrical wiring blocks and one plane of each of the electrical connection portions are overlapped and coupled. The electrical connection structure is characterized in that it can be used as a power supply terminal capable of supplying power from an external power source when the lid member is opened and exposed to the outside.

Here, it is desirable that the electrical connection portion protrudes toward the mounting surface side of the electronic component in the electrical wiring block.

Further, the electrical connection structure includes a first pressing wall that presses the other flat surface of one of the electrical connection portions and presses the one electrical connection portion against the other electrical connection portion, and the other electrical connection portion. It is desirable that the connecting member having a second pressing wall that presses the other plane of the above and presses the other electrical connection portion against the one electrical connection portion is provided as the coupling structure portion.

Further, the coupling structure portion is projected from one of the electrical connection portions and is pressure-bonded to the other electrical connection portion superimposed on the one electrical connection portion with the one electrical connection portion. It is desirable to have a crimping portion to allow.

Further, in order to achieve the above object, the electrical junction box according to the present invention is provided between an electronic component, a bus bar, and a plurality of electrical wiring blocks for electrically connecting the electronic component and the bus bar inward. An electrical connection structure in which a flat plate-shaped electrical connection portion of each of the bus bars is coupled between the two electrical wiring blocks to be joined, a housing accommodating the plurality of the electrical wiring blocks, and the electricity. The electrical connection structure includes an insulating lid member that covers the connection structure from the outside so as to be openable and closable, and the electrical connection structure is each of the electrical connection portions projecting outward from the two joined electrical wiring blocks. And a coupling structure portion that overlaps and connects one plane of each of the electrical connection portions, and the electrical connection structure is exposed to the outside when the lid member is opened. It is characterized by being able to be used as a power supply terminal capable of supplying power from an external power source.

Further, in order to achieve the above object, the wire harness according to the present invention includes a plurality of electric wiring blocks that electrically connect an electronic component, a bus bar, an electric wire, and the electronic component, the bus bar, and the electric wire internally. And, an electric connection structure in which a flat plate-shaped electric connection portion of each of the bus bars is coupled between the two electric wiring blocks to be joined to each other, and a plurality of the electric wiring blocks are accommodated. The electrical connection structure includes two jointed electrical wiring blocks, including a housing for pulling out the electric wire to the outside and an insulating lid member for covering the electrical connection structure from the outside so as to be openable and closable. Each of the electrical connection portions projecting outward from the surface and a coupling structure portion for overlapping and connecting one plane of each of the electrical connection portions are provided, and the electrical connection structure comprises the lid member. It is characterized in that it can be used as a power supply terminal that can supply power from an external power source when it is opened and exposed to the outside.

In the electrical wiring block joint according to the present invention, since each electrical connection portion is connected by overlapping one plane with each other, the contact area between the respective electrical connection portions is increased, and the contact area between the respective electrical connection portions is increased accordingly. It is possible to increase the heat dissipation area at the electrical connection part of. Therefore, this electric wiring block joint can improve the heat dissipation efficiency at each electric connection portion. Further, each electrical connection portion is arranged outside the two bonded electrical wiring blocks. Therefore, in this electric wiring block joint, heat is easily dissipated from each electric connection part to the surrounding air layer as compared with the case where each electric connection part is housed inside the electric wiring block. ing. Further, in this electric wiring block joint, since the electric connection structure can be arranged in the air layer, heat can be easily dissipated from the electric connection structure to the surrounding air layer. As described above, the electric wiring block joint according to the present invention can enhance the heat dissipation on the energization path forming the electrical connection between the electric wiring blocks. Since the electric connection structure of this electric wiring block joint has excellent heat dissipation, the electric connection structure is used as a power supply terminal for hybrid vehicles and electric vehicles that can generate a large amount of heat. be able to. Further, since the electric junction box and the wire harness according to the present invention include the electric wiring block joint, the effect of the electric wiring block joint can be similarly obtained.

FIG. 1 is a perspective view showing an electrical wiring block joint, an electrical junction box, and a wire harness according to an embodiment. FIG. 2 is an exploded perspective view in which the electrical wiring block joint is separated into a first electrical wiring block and a second electrical wiring block. FIG. 3 is a perspective view showing an electric wiring block joint in which the lid member is opened. FIG. 4 is an exploded perspective view of the electrical connection structure extracted from the electrical wiring block joint. FIG. 5 is an exploded perspective view of the first electrical wiring block. FIG. 6 is a perspective view of the first electrical wiring block viewed from another angle. FIG. 7 is an exploded perspective view of the second electrical wiring block. FIG. 8 is a perspective view of the second electrical wiring block as viewed from another angle. FIG. 9 is a perspective view of the electrically connected structure after connection as viewed from another angle. FIG. 10 is an exploded perspective view illustrating an electrical connection structure before connection. FIG. 11 is a perspective view showing an electric wiring block joint of a modified example. FIG. 12 is an exploded perspective view in which the electrical wiring block joint of the modified example is separated into a first electrical wiring block and a second electrical wiring block. FIG. 13 is an exploded perspective view of the electrical connection structure extracted from the electrical wiring block joint of the modified example. FIG. 14 is an exploded perspective view of the first electrical wiring block of the modified example. FIG. 15 is a perspective view of the first electrical wiring block of the modified example as viewed from another angle. FIG. 16 is an exploded perspective view of the second electrical wiring block of the modified example. FIG. 17 is a perspective view of the second electrical wiring block of the modified example as viewed from another angle. FIG. 18 is a perspective view of the connected electrical connection structure of the modified example as viewed from another angle. FIG. 19 is a perspective view illustrating an electrical connection structure of a modified example before crimping. FIG. 20 is an exploded perspective view illustrating an electrical connection structure of a modified example before connection. FIG. 21 is an exploded perspective view of the electrical connection structure of the modified example before connection, as viewed from another angle.

Hereinafter, embodiments of the electric wiring block joint, the electric junction box, and the wire harness according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

[Embodiment]
One of the embodiments of the electric wiring block joint, the electric junction box, and the wire harness according to the present invention will be described with reference to FIGS. 1 to 10.

Reference numerals 1 in FIGS. 1 to 4 indicate the electrical wiring block joints of the present embodiment. Further, reference numerals JB and WH of FIG. 1 refer to the electric connection box of the present embodiment including the electric wiring block joint 1 and the wire harness of the present embodiment including the electric connection box JB, respectively. Shown.

The electric wiring block joint 1 is one in which a plurality of electric wiring blocks (first electric wiring block 10 and second electric wiring block 20 described later) accommodating electronic component EPs are joined (FIGS. 1 to 4). ). Further, the electrical junction box JB is a housing JBa in which a plurality of electrical wiring blocks are housed together with electronic components EP (FIG. 1). At least one electric wiring block joint 1 is housed in the housing JBa. Therefore, in this electric junction box JB, an electric wiring block joint or an electric wiring block different from the electric wiring block joint 1 may be housed in the housing JBa. The electric wiring block joint 1 is held by a lock mechanism (not shown) or the like well known to the housing JBa. The wire harness WH is an electric wire (power supply line, signal line, etc.) We that is electrically connected to the electronic component EP of the electric junction box JB and is pulled out from the inside to the outside of the housing JBa. There is (Fig. 1). The housing JBa in the drawing is a conceptual diagram showing only the outer wall of the frame, and the two openings of the frame are closed by the respective covers.

The electric junction box JB is installed as a wire harness WH together with the electric wire We in, for example, an engine compartment of a vehicle (not shown). In this electric junction box JB, a connection object (not shown) mounted on the vehicle is electrically connected to the electronic component EP via the electric wire We. For example, in this electrical junction box JB, at least two electric wires We are electrically connected to the electronic component EP, and at least two objects to be connected are electrically connected via the electronic component EP. The electronic component EP refers to, for example, circuit protection components such as relays and fuses, connectors, terminal fittings, and the like. In the present embodiment, electronic devices such as circuit boards and electronic control units (so-called ECUs) are also considered as one form of electronic component EP housed in the housing JBa. Further, the connection target refers to a power source such as a secondary battery, a load such as an electric device (actuator, etc.), a sensor, and the like. In this example, one of the two electric wires We connected to the electronic component EP is electrically connected to the secondary battery of the vehicle.

The electric wiring block joint 1 will be specifically described below.

As shown above, the electric wiring block joint 1 is formed by joining a plurality of electric wiring blocks. The electric wiring block accommodates a bus bar in addition to the electronic component EP, and electrically connects the electronic component EP and the bus bar inside. In the electric wiring block joint 1 of the present embodiment, the two electric wiring blocks are joined by coupling the respective bus bars between the two electric wiring blocks to be joined to each other. The electric wiring block joint 1 includes an electric connection structure in which flat plate-shaped electric connection portions of the respective bus bars are connected to each other.

Here, an example will be given of an electrical wiring block joint 1 provided with two electrical wiring blocks (first electrical wiring block 10 and second electrical wiring block 20) (FIGS. 1 to 4). The first electrical wiring block 10 (FIGS. 1 to 6) and the second electrical wiring block 20 (FIGS. 1 to 4, 7 and 8) are each molded from an insulating material such as synthetic resin.

The first electrical wiring block 10 accommodates the circuit protection component EP1 as the electronic component EP and also accommodates the bus bar 30 (FIGS. 3 to 5). The first electrical wiring block 10 is formed with a first accommodation chamber 11 (FIG. 5) for accommodating and holding the circuit protection component EP1 and a second accommodation chamber 12 (FIG. 6) for accommodating and holding the bus bar 30. Has been done. In the first electric wiring block 10, six circuit protection components EP1 are accommodated, and each circuit protection component EP1 is electrically connected via one bus bar 30. Therefore, in this example, six first storage chambers 11 are arranged side by side in a grid pattern, and one circuit protection component EP1 is housed in each of the first storage chambers 11 through the opening 11a (FIG. 5). Will be done. Further, in each of the first accommodation chambers 11, the terminal connection portion 31 of the bus bar 30 accommodated in the second accommodation chamber 12 is inserted through the opening 12a (FIG. 6). Therefore, when the circuit protection component EP1 is housed in the first storage chamber 11, it is physically and electrically connected to the bus bar 30 via the terminal connection portion 31.

Here, the bus bar 30 is molded from a conductive material such as metal. The illustrated bus bar 30 is in the form of a plate formed by press-molding a metal plate such as a copper plate as a base material (FIGS. 4, 5, 9 and 10). The bus bar 30 has six terminal connection portions 31 for each circuit protection component EP1. The terminal connection portion 31 of this example is formed in a so-called male tab shape, and is inserted and fitted into one female terminal connection portion (not shown) of the circuit protection component EP1. The bus bar 30 has two combinations of three terminal connection portions 31 arranged at substantially equal intervals on the same plane, and the combinations are arranged so as to face each other. The bus bar 30 is a rectangular first connecting portion 32 that connects three terminal connecting portions 31 of one combination on the same plane and a rectangular first connecting portion 32 that connects three terminal connecting portions 31 of the other combination on the same plane. It has a second connecting portion 33 and. In this bus bar 30, each terminal connection portion 31 is projected and extends from the first connecting portion 32 and the second connecting portion 33 in the same direction, and the extending direction is the terminal of the circuit protection component EP1. It is the insertion / removal direction with the connection part. Further, the bus bar 30 has a rectangular third connecting portion 34 that connects the first connecting portion 32 and the second connecting portion 33 on the opposite side of the terminal connecting portion 31. In the bus bar 30, a main body portion is formed by six terminal connecting portions 31, a first connecting portion 32, a second connecting portion 33, and a third connecting portion 34.

In the first electrical wiring block 10, the end of the electric wire We is electrically connected to the other female terminal connection portion (not shown) of the circuit protection component EP1. The electric wire We is physically and electrically connected to the circuit protection component EP1 via, for example, a male tab type terminal fitting attached to an end portion. This electric wire We is provided for each circuit protection component EP1.

The second electrical wiring block 20 accommodates the relay EP2 as an electronic component EP and also accommodates the bus bar 40 (FIGS. 3, 4 and 7). The second electrical wiring block 20 is formed with a first storage chamber 21 (FIG. 7) for accommodating and holding the relay EP2 and a second accommodation chamber 22 (FIG. 8) for accommodating and holding the bus bar 40. There is. The second electrical wiring block 20 accommodates 10 relays EP2, and each relay EP2 is electrically connected via one bus bar 40. Therefore, in this example, ten first storage chambers 21 are arranged side by side in a grid pattern, and one relay EP2 is housed in each of the first storage chambers 21 via the opening 21a (FIG. 7). .. Further, in each of the first accommodation chambers 21, a terminal connection portion 41 of the bus bar 40 accommodated in the second accommodation chamber 22 is inserted through the opening 22a (FIG. 8). Therefore, when the relay EP2 is housed in the first storage chamber 21, it is physically and electrically connected to the bus bar 40 via the terminal connection portion 41.

Here, the bus bar 40 is molded from a conductive material such as metal. Like the bus bar 30 of the first electric wiring block 10, the bus bar 40 of this example is a plate-shaped one that is press-molded using a metal plate such as a copper plate as a base material (FIGS. 4, 7, and 9). And FIG. 10). The bus bar 40 has 10 terminal connection portions 41 for each relay EP2. The terminal connection portion 41 of this example is formed in a so-called tuning fork terminal type, and by inserting one male tab type terminal connection portion EP2a of the relay EP2, the terminal connection portion EP2a of the relay EP2 is sandwiched. The bus bar 40 has two combinations of five terminal connection portions 41 arranged at substantially equal intervals on the same plane, and the combinations are arranged so as to face each other. The bus bar 40 is a rectangular first connecting portion 42 that connects the five terminal connecting portions 41 of one combination on the same plane and a rectangular first connecting portion 42 that connects the five terminal connecting portions 41 of the other combination on the same plane. It has a second connecting portion 43 and. In this bus bar 40, each terminal connection portion 41 is projected and extends from the first connecting portion 42 and the second connecting portion 43 in the same direction, and the extending direction is the terminal connecting portion of the relay EP2. It is in the insertion / extraction direction with EP2a. Further, the bus bar 40 has a rectangular third connecting portion 44 that connects the first connecting portion 42 and the second connecting portion 43 on the opposite side of the terminal connecting portion 41. In the bus bar 40, a main body portion is formed by 10 terminal connecting portions 41, a first connecting portion 42, a second connecting portion 43, and a third connecting portion 44.

In the second electrical wiring block 20, the end portion of the electric wire We is electrically connected to the other male tab type terminal connection portion EP2b of the relay EP2. The electric wire We is physically and electrically connected to the relay EP2 via, for example, a tuning fork terminal type terminal fitting attached to an end portion. This electric wire We is provided for each relay EP2.

As shown above, the first electric wiring block 10 and the second electric wiring block 20 shown here form an electric wiring block joint 1 joined to each other by connecting the respective bus bars 30 and 40. To do. In the electrical wiring block joint 1, the opening 11a of the first accommodation chamber 11 (insertion port of the circuit protection component EP1) and the opening 21a of the first accommodation chamber 21 (insertion port of the relay EP2) are oriented in the same direction. Open the mouth so that the opening 12a of the second storage chamber 12 (insertion port of the bus bar 30) and the opening 22a of the second storage chamber 22 (insertion port of the bus bar 40) open in the same direction. The first electric wiring block 10 and the second electric wiring block 20 are joined. The electrical wiring block joint 1 includes an electrical connection structure 50 in which the electrical connection portions 35 and 45 of the respective bus bars 30 and 40 are coupled (FIGS. 2 to 4, 9 and 10).

In the bus bar 30, the electrical connection portion 35 is provided so as to protrude from the main portion (six terminal connection portions 31, the first connection portion 32, the second connection portion 33, and the third connection portion 34) (FIGS. 4 and 4). 5, FIG. 9 and FIG. 10). The illustrated bus bar 30 has a fourth connecting portion 36 protruding from an end (one side) of the first connecting portion 32, and the electrical connecting portion 35 is first connected via the fourth connecting portion 36. It is connected to the unit 32. Here, in the first connecting portion 32, the fourth connecting portion 36 is provided at one end of the three terminal connecting portions 31 in the arrangement direction. The fourth connecting portion 36 of this example is formed in a rectangular flat plate shape on the same plane as the first connecting portion 32, and extends along the arrangement direction of the three terminal connecting portions 31. The electrical connection portion 35 is provided at the end of the fourth connecting portion 36 on the protruding direction side (that is, the free end side). The electrical connection portion 35 of this example is formed in a rectangular flat plate shape on the same plane as the first connection portion 32 and the fourth connection portion 36, and is terminally connected from the end on the free end side of the fourth connection portion 36. The portion 31 is projected in the projecting direction.

In the bus bar 30, at least the electrical connection portion 35 is projected outward from the first electrical wiring block 10. Here, only the electrical connection portion 35 is projected outward from the first electrical wiring block 10. As shown above, the electrical connection portion 35 of this example is projected in the projecting direction of the terminal connection portion 31. That is, the electrical connection portion 35 of this example is projected toward the mounting surface side of the circuit protection component EP1 in the first electrical wiring block 10.

In the bus bar 40, the electrical connection portion 45 is provided in a state of protruding from the main portion (10 terminal connection portions 41, the first connection portion 42, the second connection portion 43, and the third connection portion 44) (FIG. 4, FIG. 7, FIG. 9 and FIG. 10). The illustrated bus bar 40 has a fourth connecting portion 46 projecting from an end (one side) of the first connecting portion 42, and the electrical connecting portion 45 is first connected via the fourth connecting portion 46. It is connected to the portion 42. Here, in the first connecting portion 42, the fourth connecting portion 46 is provided at one end of the five terminal connecting portions 41 in the arrangement direction. The fourth connecting portion 46 of this example is formed in a rectangular flat plate shape on the same plane as the first connecting portion 42, and extends along the arrangement direction of the five terminal connecting portions 41. The electrical connection portion 45 is provided at the end portion of the fourth connecting portion 46 on the protruding direction side (that is, the free end side). The electrical connection portion 45 of this example is formed in a rectangular flat plate shape on the same plane as the first connection portion 42 and the fourth connection portion 46, and is terminally connected from the end on the free end side of the fourth connection portion 46. The portion 41 is projected in the projecting direction.

In the bus bar 40, at least the electrical connection portion 45 is projected outward from the second electrical wiring block 20. Here, the electrical connection portion 45 and the fourth connection portion 46 are projected outward from the second electrical wiring block 20. As shown above, the electrical connection portion 45 of this example is projected in the projecting direction of the terminal connection portion 41. That is, the electrical connection portion 45 of this example is projected toward the mounting surface side of the relay EP2 in the second electrical wiring block 20.

In the electric wiring block joint 1, at least the third storage chamber in which the fourth connecting portions 36, 46 of the respective bus bars 30 and 40 are housed is included in the first electric wiring block 10 and the second electric wiring block 20. It is provided on one side. Here, the first electrical wiring block 10 is provided with the third storage chamber 13 (FIGS. 1 to 6). The third accommodation chamber 13 has an opening 13a having an opening in the same direction as the opening 12a of the second accommodation chamber 12 (FIG. 6). The electrical connection portions 35, 45 and the fourth connection portions 36, 46 of the respective bus bars 30 and 40 are inserted into the third storage chamber 13 through the opening 13a. The third storage chamber 13 has an opening 13b having an opening in the same direction as the opening 11a of the first storage chamber 11 (FIGS. 2 to 5). Each of the electrical connection portions 35 and 45 inserted into the third accommodation chamber 13 projects outward from the opening 13b of the third accommodation chamber 13. The third storage chamber 13 is provided with a notch 13c so as not to obstruct the insertion of the electrical connection portion 45 (FIG. 6).

The electrical connection structure 50 connects the respective bus bars 30 and 40 in a state in which one of the planes of the electrical connection portions 35 and 45 arranged opposite to each other is overlapped with each other. The electrical connection structure 50 includes the electrical connection portions 35 and 45 protruding outward from the joined first electrical wiring block 10 and the second electrical wiring block 20, and the electrical connection portions 35 and 45, respectively. A coupling structure portion 51 for superimposing and coupling one of the planes is provided (FIGS. 2 to 4, 9 and 10).

Specifically, the electrical connection structure 50 of the present embodiment includes a connection member which is a member different from the bus bars 30 and 40 as the coupling structure portion 51 (FIGS. 2 to 4, 9 and 10). .. Therefore, in the following, the connecting member will be referred to as a "connecting member 51". The connecting member 51 of this example is molded from a conductive material such as metal.

The connecting member 51 has a first pressing wall 51a arranged to face the other plane in one of the electrical connecting portions 35 and 45, and a second pressing wall facing the other plane in the other. It has a wall 51b (FIGS. 2 and 10). The connecting member 51 sandwiches the respective electrical connecting portions 35, 45 on which one of the planes is overlapped by the first pressing wall 51a and the second pressing wall 51b, so that the respective electrical connecting portions 35, 45 can be formed. Keep them in an overlapping state. Therefore, with the first pressing wall 51a, by pressing the other plane of one electric connection portion 35 (45), the one electric connection portion 35 (45) is made into the other electric connection portion 45 (35). It is something to push. Further, the second pressing wall 51b presses the other flat surface of the other electrical connection portion 45 (35) to make the other electrical connection portion 45 (35) into one electrical connection portion 35 (45). It is something to push.

The connecting member 51 of this example includes a first connecting wall 51c that connects one end (one side) adjacent to the first pressing wall 51a and the second pressing wall 51b that are arranged so as to face each other at intervals, and a first connecting wall 51c thereof. It has a first pressing wall 51a and a second connecting wall 51d that connects the other end (one side) adjacent to the second pressing wall 51b (FIGS. 2 and 10). Here, the connecting member 51 is formed into a square cylinder having the first pressing wall 51a, the second pressing wall 51b, the first connecting wall 51c, and the second connecting wall 51d. In the connecting member 51, the inner space surrounded by the first pressing wall 51a, the second pressing wall 51b, the first connecting wall 51c, and the second connecting wall 51d is used as the insertion space 52 (FIGS. 2 and 10). ), The respective electrical connection portions 35 and 45 are inserted into the insertion space 52 in a state where one of the planes is overlapped with each other.

In the connecting member 51 of this example, at least one _{bulging portion 51a 1} , 51b ₁ bulging into the insertion space 52 is provided on each of the first pressing wall 51a and the second pressing wall 51b ( 4 and 9). The bulging portions 51a ₁ , 51b ₁ are arranged to face each other with the insertion space 52 interposed therebetween, and sandwich the electrical connection portions 35, 45 inserted into the insertion space 52. Here, three sets of combinations of the bulging portions 51a ₁ and 51b ₁ arranged to face each other are provided.

The bulging portions 51a ₁ , 51b ₁ may be formed in advance before the respective electrical connecting portions 35, 45 are inserted. In this case, _{the distance between the bulging portions 51a 1} and 51b ₁ arranged to face each other is made smaller than the total plate thickness of the respective electrical connecting portions 35 and 45. The distance between the bulging portions 51a ₁ and 51b ₁ is reduced within a range in which the respective electrical connecting portions 35 and 45 can be inserted into the insertion space 52. Therefore, when the electrical connection portions 35 and 45 are inserted into the insertion space 52, they are sandwiched between _{the bulging portions 51a 1} and 51b _1.

On the other hand, the respective bulging portions 51a ₁ , 51b ₁ may be formed by applying pressure from the outside after the respective electrical connecting portions 35, 45 are inserted. In this case, the distance between the first pressing wall 51a and the second pressing wall 51b arranged to face each other is made larger than the total value of the plate thicknesses of the respective electrical connection portions 35 and 45. The respective bulging portions 51a ₁ , 51b ₁ partially add the first pressing wall 51a and the second pressing wall 51b from the outside toward the respective electrical connection portions 35, 45 inserted into the insertion space 52. It is formed by pressing. The pressurizing target portions of the first pressing wall 51a and the second pressing wall 51b pressurize to a position where the respective electrical connection portions 35 and 45 can be sandwiched by _{the respective bulging portions 51a 1} and 51b _1. Here, the bulging portions 51a ₁ , 51b ₁ formed by the subsequent pressurization are illustrated.

The electrical wiring block joint 1 includes an insulating lid member 60 that covers the electrical connection structure 50 so as to be openable and closable from the outside (FIGS. 1 to 6). The lid member 60 is molded from an insulating material such as synthetic resin. The lid member 60 forms a main body portion 61 so as not to expose the electrical connection structure 50 to the outside in the closed position. In this example, the main body portion 61 is formed in a square tubular shape with an opening at one end closed. In the main body portion 61, the opening 61a at the other end is used as an insertion port for the electrical connection structure 50, and the internal space 61b is used as a storage chamber for the electrical connection structure 50 in the closed position (FIG. 6).

The lid member 60 of this example is attached to the first electrical wiring block 10. The lid member 60 may be detachably attached to the first electric wiring block 10 and may be attached to the first electric wiring block 10 so as to be relatively movable between the closed position and the open position. It may be the one that can be used. The lid member 60 of this example is provided with a rotating shaft 62 that rotatably attaches the main body portion 61 to the first electrical wiring block 10 (FIG. 1). The lid member 60 rotates the main body portion 61 relative to the closed position (FIG. 1) and the open position (FIGS. 2 to 6) around the axis of the rotating shaft 62. Since the lid member 60 in the closed position does not expose the electrical connection structure 50 to the outside, it is possible to avoid contact of other parts, human fingers, or the like with the electrical connection structure 50. On the other hand, the lid member 60 in the open position can expose the electrical connection structure 50 to the outside. For example, when the lid member 60 is opened and exposed to the outside (FIG. 3), the electrical connection structure 50 is subjected to an external power source (for example, a secondary battery of another vehicle serving as a rescue vehicle, a charger, or the like). ) Can be used as a power supply terminal.

In this example, a lock mechanism 65 is provided between the lid member 60 and the first electric wiring block 10 in order to hold the lid member 60 in the first electric wiring block 10 in the closed position (FIGS. 2, 4 and 4). FIG. 5). The lock mechanism 65 includes a locking portion 65a provided on the lid member 60 and a locked portion 65b provided on the first electrical wiring block 10. Here, the locking portion 65a and the locked portion 65b are formed as a claw portion in which the locking portion 65a and the locked portion 65b are locked to each other when the lid member 60 is in the closed position. The locking portion 65a of this example is provided on a flexible piece portion 63 protruding from the main body portion 61.

As described above, in the electric wiring block joint 1 of the present embodiment, the respective bus bars 30 and 40 can be physically and electrically connected by connecting the respective electric connection portions 35 and 45, and the electric wiring block joint 1 can be physically and electrically connected. , The first electric wiring block 10 and the second electric wiring block 20 can be joined. In this state, the electrical wiring block joints 1 have their respective electrical connection portions 35 and 45 overlapped with each other on one of the planes. Therefore, the electrical wiring block joint 1 can increase the contact area between the respective electrical connection portions 35 and 45, and can stabilize the electrical connection between the electrical connection portions 35 and 45.

Further, the increase in the contact area also leads to an increase in the heat dissipation area at the respective electrical connection portions 35 and 45. Therefore, in the electric wiring block joint 1, the heat dissipation area can be increased and the heat dissipation efficiency can be improved at the respective electric connection portions 35 and 45. Further, the respective electrical connection portions 35 and 45 are arranged outside the joined first electrical wiring block 10 and the second electrical wiring block 20. Therefore, the electrical wiring block joint 1 is surrounded by the electrical connection portions 35 and 45, as compared with the case where the electrical connection portions 35 and 45 are housed inside the first electrical wiring block 10 and the like. It is easy to dissipate heat to the air layer. Further, the respective electrical connection portions 35 and 45 are projected toward the mounting surface side of the electronic component EP in the first electrical wiring block 10 and the second electrical wiring block 20. Therefore, in this electrical wiring block joint 1, the respective electrical connection portions 35, 45 can be arranged in the air layer surrounded by the frame and the cover of the housing JBa, and thus the respective electrical connection portions 35, 45 can be arranged. It is easy to dissipate heat from the air to the surrounding air layer. Further, the respective electrical connection portions 35 and 45 are sandwiched between the connection members 51 to form the electrical connection structure 50. Therefore, in the electric wiring block joint 1, the electric connection structure 50 can be arranged in the air layer, so that heat can be easily dissipated from the electric connection structure 50 to the surrounding air layer. By using a material having a high thermal conductivity for the connecting member 51 of the electric wiring block joint 1, heat dissipation from the electric connection structure 50 can be further facilitated. As described above, the electric wiring block joint 1 of the present embodiment can improve the heat dissipation on the energization path forming the electrical connection between the first electric wiring block 10 and the second electric wiring block 20. it can.

Furthermore, in the electric wiring block joint 1, the electric connection structure 50 can be used as a power feeding terminal. In particular, in the electric wiring block joint 1 of the present embodiment, since the electric connection structure 50 has excellent heat dissipation, it is electrically connected as a power supply terminal for a hybrid vehicle, an electric vehicle, or the like that can generate a large amount of heat. The structure 50 can be used. As described above, since it is not necessary to provide the dedicated parts for the power feeding terminal in the electric wiring block joint 1, the number of parts can be reduced and the cost can be reduced.

As shown above, the electrical wiring block joint 1 of the present embodiment stabilizes the electrical connection between the first electrical wiring block 10 and the second electrical wiring block 20 to be joined, and stabilizes the electrical connection thereof. It is possible to improve heat dissipation on the energization path that forms an electrical connection. Further, the electric wiring block joint 1 can reduce the cost while exhibiting such an effect. Further, since the electric connection box JB and the wire harness WH of the present embodiment include the electric wiring block joint 1, the effect of the electric wiring block joint 1 can be similarly obtained.

[Modification example]
Reference numerals 2 in FIGS. 11 to 13 indicate the electrical wiring block joints of this modified example. Although not shown here, the electric wiring block joint 2 constitutes an electric connection box JB by being housed in the housing JBa, and the electric wire We is connected to the electric connection box JB, as in the above-described embodiment. This constitutes the wire harness WH. Further, the same items as those in the embodiment may be omitted from the description even if they are shown together with the reference numerals in the drawings of the present modification.

The electric wiring block joint 2 is formed by joining a plurality of electric wiring blocks as in the above-described embodiment. In this electric wiring block joint 2, also in this modification, as in the above-described embodiment, by connecting the respective bus bars between the two electric wiring blocks to be joined to each other, the electric wiring block joint 2 is formed. Join the two electrical wiring blocks. The electrical wiring block joint 2 includes an electrical connection structure in which the electrical connection portions of the respective bus bars are coupled.

Here, an example will be given of an electrical wiring block joint 2 provided with two electrical wiring blocks (first electrical wiring block 110 and second electrical wiring block 120) (FIGS. 11 to 13). The first electrical wiring block 110 (FIGS. 11 to 15) and the second electrical wiring block 120 (FIGS. 11 to 13, 16 and 17) are each molded from an insulating material such as synthetic resin.

The first electrical wiring block 110 is the same as the first electrical wiring block 10 of the embodiment, and houses the circuit protection component EP1 and the bus bar 130 (FIGS. 13 and 14). The first electrical wiring block 110 is formed with a first accommodation chamber 111 (FIG. 14) for accommodating and holding the circuit protection component EP1 and a second accommodation chamber 112 (FIG. 15) for accommodating and holding the bus bar 130. Has been done. The circuit protection component EP1 is accommodated in the first accommodating chamber 111 through the opening 111a (FIG. 14). The bus bar 130 is accommodated in the second accommodating chamber 112 through the opening 112a (FIG. 15). In the first electric wiring block 110, the first accommodation chamber 111 and the second accommodation chamber 112 are formed in the same quantity and arrangement as the first electric wiring block 10.

The bus bar 130 is formed in the same shape as the bus bar 30 of the embodiment, and has six terminal connection portions 131, a first connection portion 132, a second connection portion 133, a third connection portion 134, and an electrical connection portion 135. And a fourth connecting portion 136 (FIGS. 12 to 14). Since the electrical connection portion 135 projects in the projecting direction of the terminal connection portion 131 like the electrical connection portion 35 of the embodiment, it is located on the mounting surface side of the circuit protection component EP1 in the first electrical wiring block 110. It will be projected.

The second electrical wiring block 120 is similar to the second electrical wiring block 20 of the embodiment, and houses the relay EP2 and the bus bar 140 (FIGS. 13 and 16). The second electrical wiring block 120 is formed with a first storage chamber 121 (FIG. 16) for accommodating and holding the relay EP2 and a second storage chamber 122 (FIG. 17) for accommodating and holding the bus bar 140. There is. The relay EP2 is accommodated in the first accommodating chamber 121 via the opening 121a (FIG. 16). The bus bar 140 is accommodated in the second accommodating chamber 122 through the opening 122a (FIG. 17). In the second electrical wiring block 120, the first accommodation chamber 121 and the second accommodation chamber 122 are formed in the same quantity and arrangement as the second electrical wiring block 20.

The bus bar 140 is formed in the same shape as the bus bar 40 of the embodiment, and has 10 terminal connection portions 141, a first connection portion 142, a second connection portion 143, a third connection portion 144, and an electrical connection portion. It has 145 and a fourth connecting portion 146 (FIGS. 11 to 13, 16 and 17). Since the electrical connection portion 145 is projected in the projecting direction of the terminal connection portion 141 as in the electrical connection portion 45 of the embodiment, it is projected toward the mounting surface side of the relay EP2 in the second electrical wiring block 120. Will be.

In the electrical wiring block joint 2, the opening 111a (insertion port of the circuit protection component EP1) of the first storage chamber 111 and the opening 121a (insertion port of the relay EP2) of the first storage chamber 121 are oriented in the same direction. Open the mouth so that the opening 112a (insertion port of the bus bar 130) of the second storage chamber 112 and the opening 122a (insertion port of the bus bar 140) of the second storage chamber 122 open in the same direction. The first electric wiring block 110 and the second electric wiring block 120 are joined.

In the electric wiring block joint 2, at least the third storage chamber in which the fourth connecting portions 136 and 146 of the respective bus bars 130 and 140 are housed is included in the first electric wiring block 110 and the second electric wiring block 120. It is provided on one side. Here, the first electrical wiring block 110 is provided with the third storage chamber 113 (FIGS. 11 to 15). The third accommodation chamber 113 has an opening 113a (FIG. 15) having an opening in the same direction as the opening 112a of the second accommodation chamber 112 and an opening in the same direction as the opening 111a of the first accommodation chamber 111. It has an opening 113b (FIGS. 11 to 14). The electrical connection portions 135, 145 and the fourth connection portion 136, 146 of the respective bus bars 130 and 140 are inserted into the third storage chamber 113 through the opening 113a. The respective electrical connection portions 135 and 145 inserted into the third accommodation chamber 113 project from the opening 113b to the outside of the third accommodation chamber 113. The third accommodation chamber 113 is provided with a notch 113c so as not to hinder the insertion of the electrical connection portion 145 (FIG. 15).

The electrical wiring block joint 2 includes an electrical connection structure 150 in which the electrical connection portions 135 and 145 of the respective bus bars 130 and 140 are coupled (FIGS. 11 to 14 and 16 to 21).

Similar to the electrical connection structure 50 of the embodiment, the electrical connection structure 150 is a state in which one of the planes of the electrical connection portions 135, 145 facing each other is overlapped with each other, and the respective bus bars 130. , 140 are combined. The electric connection structure 150 includes the electric connection portions 135 and 145 protruding outward from the joined first electric wiring block 110 and the second electric wiring block 120, and the electric connection portions 135 and 145, respectively. A coupling structure portion 151 for superimposing and coupling one of the planes is provided (FIGS. 11 to 14 and 18 to 21).

Specifically, the coupling structure portion 151 of the present embodiment has one of the respective electrical connection portions 135 and 145, and the other electrical connection portion 145 (135) superposed on the one electrical connection portion 135 (145). ), It has a crimping portion 151a for crimping with one of the electrical connecting portions 135 (145) (FIGS. 11 to 14 and 18 to 21). The crimping portion 151a protrudes from one of the electrical connecting portions 135 (145).

Here, crimping portions 151a are provided at two end portions (side portions) of the electrical connecting portions 135 located in the arrangement direction of the three terminal connecting portions 131 and arranged opposite to each other. Each crimping portion 151a is formed as a rectangular flat plate-shaped piece on the same plane as the electrical connecting portion 135, and by bending and pressurizing the piece, the crimping portion 151a is connected to the electrical connecting portion 135. It is crimped to the electrical connection portion 145. Each crimping portion 151a is like a barrel piece portion in a so-called crimping terminal.

For example, each crimping portion 151a is bent in an arc shape after overlapping one of the planes of the respective electrical connecting portions 135 and 145, and the electrical connecting portion 145 is interposed between the crimping portion 151a and the electrical connecting portion 135 (FIG. FIG. 19). After that, each of the crimping portions 151a is crushed into a flat plate shape while the arc-shaped portion is pressurized, and is crimped to the electrical connecting portion 145 with the electrical connecting portion 135 (FIGS. 13 and 18). When such a crimping process is adopted in this example, the respective electrical connection portions 135 and 145 are connected in advance, and then the respective bus bars 130 and 140 connected to each other are connected to the first electrical wiring block 110 and the second. It is housed in the electrical wiring block 120.

On the other hand, each crimping portion 151a can be inserted into the third accommodating chamber 113 from the opening 113a together with the electrical connecting portion 135, and can be projected from the opening 113b to the outside of the third accommodating chamber 113. It may be pre-folded into a possible shape (for example, arc shape). At the time of the bending process, a space S having a size capable of inserting the electric connection portion 145 is left between each crimping portion 151a and the electric connection portion 135 (FIGS. 20 and 21). In this case, the respective bus bars 130 and 140 before coupling can be accommodated in the first electric wiring block 110 and the second electric wiring block 120. In this case, after the electrical connection portion 145 is inserted between the respective crimping portions 151a and the electrical connecting portion 135 (FIG. 19), the arcuate portion of each crimping portion 151a is pressurized. Each crimping portion 151a is crushed into a flat plate shape while the arc-shaped portion is pressurized, and is crimped to the electrical connecting portion 145 with the electrical connecting portion 135 (FIGS. 13 and 18).

Although not shown, the electrical wiring block joint 2 includes an insulating lid member that covers the electrical connection structure 150 so as to be openable and closable from the outside. The lid member is the same as the lid member 60 of the embodiment, and is detachably attached to, for example, the first electric wiring block 110. Like the electrical connection structure 50 of the embodiment, the electrical connection structure 150 can be used as a power supply terminal capable of supplying power from an external power source when the lid member is opened and exposed to the outside. is there.

As shown above, the electric wiring block joint 2 of the present modification has a different connection form of the electric connection portions 135 and 145 from the electric wiring block joint 1 of the embodiment, but has other configurations. And the structure are the same as those of the electrical wiring block joint 1 of the embodiment. Therefore, the electric wiring block joint 2 of the present modification can obtain the same effect as the electric wiring block joint 1 of the embodiment. Further, since the electric junction box JB and the wire harness WH of this modification include the electric wiring block joint 2, the effect of the electric wiring block joint 2 can be similarly obtained.

1,2 Electrical wiring block joint 10,110 1st electrical wiring block 20,120 2nd electrical wiring block 30,40,130,140 Bus bar 35,45,135,145 Electrical connection part 50,150 Electrical connection structure 51 Connection member (joint structure part)
51a 1st pressing wall 51b 2nd pressing wall 60 Lid member 151 Coupling structure 151a Crimping part EP Electronic component JB Electric junction box JBa Housing We Electric wire WH Wire harness

Claims (6)

Multiple electrical wiring blocks that electrically connect electronic components and bus bars inside,
An electrical connection structure in which a flat plate-shaped electrical connection portion of each of the bus bars is coupled between the two electrical wiring blocks to be joined to each other.
An insulating lid member that covers the electrical connection structure from the outside so that it can be opened and closed.
With
The electrical connection structure is a coupling structure in which each of the electrical connection portions projecting outward from the two bonded electrical wiring blocks and one plane of each of the electrical connection portions are overlapped and coupled. With a department,
The electrical connection structure is an electrical wiring block joint characterized in that it can be used as a power supply terminal capable of supplying power from an external power source when the lid member is opened and exposed to the outside. The electrical wiring block joint according to claim 1, wherein the electrical connection portion projects toward the mounting surface side of the electronic component in the electrical wiring block. The electrical connection structure includes a first pressing wall that presses the other plane of one of the electrical connections to press the one electrical connection against the other electrical connection, and the other of the other electrical connection. The invention according to claim 1 or 2, wherein a connecting member having a second pressing wall that presses the flat surface of the above and presses the other electrical connection portion against the one electrical connection portion is provided as the coupling structure portion. Electrical wiring block joint. The coupling structure portion is crimped so as to protrude from one of the electrical connection portions and to be crimped to the other electrical connection portion superimposed on the one electrical connection portion with the one electrical connection portion. The electrical wiring block joint according to claim 1 or 2, wherein the portion is provided. With electronic components
Basba and
A plurality of electrical wiring blocks that electrically connect the electronic component and the bus bar inside.
An electrical connection structure in which a flat plate-shaped electrical connection portion of each of the bus bars is coupled between the two electrical wiring blocks to be joined to each other.
A housing that accommodates the plurality of electrical wiring blocks,
An insulating lid member that covers the electrical connection structure from the outside so that it can be opened and closed.
With
The electrical connection structure is a coupling structure in which each of the electrical connection portions projecting outward from the two bonded electrical wiring blocks and one plane of each of the electrical connection portions are overlapped and coupled. With a department,
The electrical connection structure is an electrical connection box characterized in that it can be used as a power supply terminal capable of supplying power from an external power source when the lid member is opened and exposed to the outside. With electronic components
Basba and
With electric wires
A plurality of electrical wiring blocks that electrically connect the electronic component, the bus bar, and the electric wire inwardly.
An electrical connection structure in which a flat plate-shaped electrical connection portion of each of the bus bars is coupled between the two electrical wiring blocks to be joined to each other.
A housing that accommodates a plurality of the electric wiring blocks and pulls out the electric wire to the outside,
An insulating lid member that covers the electrical connection structure from the outside so that it can be opened and closed.
With
The electrical connection structure is a coupling structure in which each of the electrical connection portions projecting outward from the two bonded electrical wiring blocks and one plane of each of the electrical connection portions are overlapped and coupled. With a department,
The electric connection structure is a wire harness characterized in that it can be used as a power supply terminal capable of supplying power from an external power source when the lid member is opened and exposed to the outside.

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