Electrical junction box

Abstract

The present invention is provided with: a circuit branching member (20) that is disposed outside a frame (40) outside a cylinder part (41) and has a conductive circuit branching member (21) built in a resin member (26), the cylinder wall (41c) of the cylinder part having an opposing wall body (41f) disposed outside the cylinder so as to face the circuit branching member; the resin member has a holding portion (26a) that holds a load connection portion (23) of the circuit branching member in a state in which an exposed surface (23b) of the load connection portion is exposed, and the circuit branching member is disposed so that the exposed surface of the load connection portion faces the opposing wall body and so that the exposed surface is interposed between the holding portion and the opposing wall body.

Description

Technical Field

[0001] The invention relates to an electrical junction box. Background Art

[0002] In an electrical connection box, electronic components such as relays provided between an external power source and a load are housed in a frame. In the electrical connection box, wires electrically connected to the electronic components are routed in the frame, and the wires are led out of the frame to be electrically connected to the power source and the load. For example, the following patent document 1 discloses such a conventional electrical connection box.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2014-93888 Summary of the invention

[0006] Technical problem that the invention aims to solve

[0007] However, in recent years, in order to achieve lightweight, the core wire material of the electric wire is changed to make the wire diameter thicker, or the wire diameter is thicker to cope with large currents, etc., and the use of wires that are difficult to bend has become more common. Therefore, in the electrical junction box, it is difficult to route the wires in the narrow space in the frame, and there is a possibility that an overload is applied from the wires to the surrounding inside the frame. In the electrical junction box, for example, by arranging such wires and components connected to the wires outside the frame, it is possible to suppress the overload inside the frame caused by the wires. However, in the electrical junction box, in the case where the electrical connection part that physically connects the component and the wire connected to it is arranged outside the frame due to the component being arranged outside the frame, when the assembly operation and maintenance operation of the surrounding components are performed outside the frame, other components such as metal components and tools may come into contact with the electrical connection part.

[0008] Therefore, an object of the present invention is to provide an electric junction box capable of suppressing contact between other components and an electrical connection portion outside a housing.

[0009] Technical solutions to the problem

[0010] The present invention is characterized in that it comprises an electronic component; an internal conductive component, which electrically connects the electronic component to an external power source; a frame, which has a barrel, which is composed of a barrel wall with an opening at least at one end and accommodates and holds the electronic component and the internal conductive component in its barrel; a cover component, which closes the opening of the barrel; and a circuit branch component, which is arranged outside the barrel of the barrel outside the frame and makes a conductive circuit branch member built into the resin component between the external power source and the external load, the internal conductive component having: a first electrical connection portion that is physically and electrically connected to the electronic component in the barrel of the barrel; and a second electrical connection portion, the circuit branch member having: a power supply connection portion that is exposed to the outside of the resin component and is connected to the barrel The outer tube of the cylinder is arranged outside the frame, and the power supply side terminal fitting at the end of the power supply side electric wire electrically connected to the external power supply is physically and electrically connected to the second electric connection part of the internal conductive part; and a load connection part, which is exposed to the outside of the resin part and is arranged outside the cylinder of the cylinder outside the frame, and is physically and electrically connected to the load side terminal fitting at the end of the load side electric wire electrically connected to the external load, the cylinder wall of the cylinder has an opposing wall body arranged opposite to the circuit branching part outside the cylinder, the resin part has a holding part, the holding part holds the load connection part in a state where the exposed surface of the load connection part is exposed, and the circuit branching part is arranged so that the exposed surface of the load connection part faces the opposing wall body, and the exposed surface is between the holding part and the opposing wall body.

[0011] Effects of the Invention

[0012] The electric connection box according to the present invention can suppress overload of the electric wires connected to the circuit branching component in the frame by arranging the circuit branching component outside the tube of the tube portion and outside the frame. In addition, in the electric connection box, the physical and electrical connection parts (first power supply side electrical connection structure, second power supply side electrical connection structure, etc.) in the circuit branching component are arranged at a position closer to the frame than the resin part, so that other parts can be suppressed from contacting the connection parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a perspective view showing the electric junction box according to the embodiment.

[0014] Figure 2 This is a plan view of the electric connection box (without the first cover member) according to the embodiment as viewed from one opening side of the frame.

[0015] Figure 3 This is a plan view of the electric junction box (without the first cover member) according to the embodiment as seen from the side of the frame.

[0016] Figure 4 It is an exploded perspective view showing the electric junction box (without the first cover member and the second cover member) according to the embodiment.

[0017] Figure 5 This is an exploded perspective view of the electric junction box (without the first cover member and the second cover member) according to the embodiment as viewed from another angle.

[0018] Figure 6 yes Figure 3 X1-X1 line cross-sectional view.

[0019] Figure 7 yes Figure 3 X2-X2 line cross-sectional view.

[0020] Figure 8 It is an exploded perspective view showing a block and an internal conductive component and an external thread component housed in the block.

[0021] Fig. 9 It is an exploded perspective view of the frame and the second cover member in the electric connection box (without the first cover member) according to the embodiment.

[0022] Fig.10 This is an exploded perspective view illustrating the load-side electrical connection structure.

[0023] Fig.11 It is a perspective view showing a circuit protection component.

[0024] Fig.12 It is a three-dimensional diagram showing a frame.

[0025] Fig.13 It is a perspective view showing the first divided cover. DETAILED DESCRIPTION

[0026] Hereinafter, an embodiment of the electric connection box of the present invention will be described in detail based on the drawings. However, the present invention is not limited to the embodiment.

[0027] [Implementation Method]

[0028] based on Figures 1 to 13 One embodiment of the electric connection box according to the present invention will be described.

[0029] Figures 1 to 7 Reference numeral 1 denotes an electrical connection box of the present embodiment. The electrical connection box 1 is mounted on a vehicle such as an automobile, and is interposed between an external power source B such as a secondary battery in the vehicle and an external load L such as a power distribution object (for example, an auxiliary device to be powered), thereby supplying power from the external power source B to the external load L ( Figure 1 ).

[0030] The electrical connection box 1 includes electronic components 10 such as relays and fuses. Figure 2 ), so that the electronic component 10 is interposed between the external power supply B and the external load L. Furthermore, the electrical connection box 1 includes a circuit branching component 20 ( Figures 1 to 5 ). The circuit branching component 20 is a component for distributing the electric power from the external power source B to a plurality of external loads L. The electric connection box 1 includes a plurality of electronic components 10 and at least one circuit branching component 20 .

[0031] The electrical connection box 1 comprises: a block 30, which holds the electronic component 10; and a frame 40, which has a cylinder 41, the cylinder 41 accommodating and holding the block 30 in the cylinder and consisting of a cylinder wall 41c with openings at both ends (openings 41a, 41b) ( Figures 1 to 8 ). In addition, the electrical connection box 1 includes: a cover member (hereinafter referred to as a "first cover member") 51 for closing an opening 41a in the barrel 41; and a cover member (hereinafter referred to as a "second cover member") 52 for closing the other opening 41b in the barrel 41 ( Figure 1 , Figure 3 and Fig. 9 The block 30, the frame 40, the first cover member 51, and the second cover member 52 are formed of an insulating material such as synthetic resin.

[0032] In the electric connection box 1, the frame 40, the first cover member 51 and the second cover member 52 form a housing in which wires (not shown) electrically connected to the electronic components 10 are routed and drawn out of the housing through an opening.

[0033] In the frame 40, the block 30 is inserted into the cylinder of the cylinder 41 from the other opening 41b. When the frame 40 is composed of one cylinder 41, the outer wall constituting the outer frame thereof is entirely formed by the cylinder wall 41c of the cylinder 41. In addition, when the frame 40 is composed of a combination of a plurality of cylinders 41 whose opening directions of one opening 41a are respectively consistent and whose opening directions of another opening 41b are respectively consistent, the outer wall constituting the outer frame thereof is formed by a combination of a part of the cylinder walls 41c of the plurality of cylinders 41. That is, all or a part of the outer wall constituting the outer frame of the frame 40 is formed by the cylinder wall 41c of the cylinder 41.

[0034] The frame 40 shown here is composed of two cylinders 41, and is mounted on the vehicle in a manner that one opening 41a faces upward. The first cover member 51 shown here is provided for each cylinder 41. In addition, the second cover member 52 shown here is divided into a first split cover 52A and a second split cover 52B that can be assembled with each other, and the other opening 41b ( 41a ) of each of the two cylinders 41 is closed in the form of the first split cover 52A and the second split cover 52B assembled. Figure 1 , Figure 3 and Fig. 9 ).

[0035] The electric connection box 1 includes an internal conductive member 60 (61) which electrically connects the electronic component 10 to the external power source B and is held together with the electronic component 10 in the block 30. Figure 5 , Figure 6 and Figure 8 The internal conductive component 60 has a first electrical connection portion 61 ( ) which is physically and electrically connected to the electronic component 10 in the cylinder of the cylinder 41. Figure 8 The first electrical connection portion 61 is provided for each electronic component 10. In addition, the internal conductive component 60 has a second electrical connection portion 62 ( Figure 5 , Figure 6 and Figure 8 In the internal conductive component 60, a plurality of first electrical connection portions 61 and a second electrical connection portion 62 are connected via a connecting portion 63 ( Figure 8 The internal conductive member 60 has a shape in which the connecting portion 63 extends outside the tube of the tube 41, and the second electrical connecting portion 62 is connected to the connecting portion 63 outside the frame 40 in the direction in which the connecting portion 63 extends. That is, the second electrical connecting portion 62 is arranged outside the tube of the tube 41 and outside the frame 40.

[0036] The internal conductive component 60 is a so-called bus bar, and is formed into a plate shape using a metal plate as a base material, for example. The block 30 has a block body 31 ( Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 8 and Fig. 9 ).

[0037] Furthermore, the electrical connection box 1 may include a frame 40 integrated with the block 30. The frame 40 includes a cylinder 41, which is composed of a cylinder wall 41c having an opening 41a at at least one end, and contains and holds the electronic component 10 and the internal conductive component 60 in the cylinder. For example, in the electrical connection box 1, as long as the frame 40 includes a cylinder 41 composed of a cylinder wall 41c with openings at both ends (openings 41a and 41b), the first cover member 51 and the second cover member 52 are provided in the same manner as in the previous example. On the other hand, if the frame 40 includes a cylinder 41 composed of a cylinder wall 41c having only an opening 41a (i.e., a cylinder 41 with an opening 41b closed), the electrical connection box 1 includes only the first cover member 51.

[0038] The circuit branching component 20 is arranged outside the frame 40 outside the cylinder 41. In addition, the circuit branching component 20 includes a conductive circuit branching member 21 ( Figure 4 , Figure 5 , Fig.10 and Fig.11 ).

[0039] Here, the circuit branching component 20 has at least a power supply connection portion 22 and a load connection portion 23 described later. In addition, the circuit branching component 20 has a connection portion 25 described later that electrically connects the power supply connection portion 22 and a plurality of load connection portions 23. However, in the circuit branching component 20 shown here, in addition to the power supply connection portion 22 and the load connection portion 23, it also has a fusible portion 24 described later for cutting off an overcurrent between the external power supply B and the external load L, and it also has a connection portion 25 described later. That is, here, as an example of the circuit branching component 20, a circuit protection component for cutting off an overcurrent between the external power supply B and the external load L is cited. Therefore, the circuit branching component (circuit protection component) 20 shown here has a conductive circuit protection component interposed between the external power supply B and the external load L as the circuit branching member 21.

[0040] The circuit branch member (circuit protection member) 21 has a power connection portion 22, which is arranged outside the frame 40 outside the cylinder of the cylinder 41, and the power connection portion 22 physically and electrically connects the power supply side terminal fitting T at the end of the power supply side wire WB electrically connected to the external power supply B to the second electrical connection portion 62 of the internal conductive member 60 ( Figures 4 to 6 , Fig.10 and Fig.11 ).

[0041] In addition, the circuit branching member (circuit protection member) 21 includes: a load connecting portion 23, which is arranged outside the barrel of the barrel portion 41 and outside the frame 40, and physically and electrically connects the load-side terminal fitting TL at the end of the load-side electric wire WL electrically connected to the external load L; and a fusible portion 24, which is provided between the power supply connecting portion 22 and the load connecting portion 23 and melts when an overcurrent flows ( Fig.10 and Fig.11 In the circuit branching member (circuit protection member) 21, the load connection portion 23 and the fusible portion 24 are provided for each external load L. In addition, the circuit branching member (circuit protection member) 21 has a connection portion 25 ( Fig.11 The power supply connection portion 22 and the fusible portion 24 provided for each external load L are connected to the connection portion 25 .

[0042] The circuit branching member (circuit protection member) 21 is a so-called bus bar, and is formed into a plate shape using a metal plate as a base material, for example. The circuit branching member (circuit protection member) 20 is such that the circuit branching member (circuit protection member) 21 built into the resin member 26 is interposed between the external power source B and the external load L. Therefore, in the circuit branching member (circuit protection member) 20, the power source connection portion 22, the load connection portion 23, and the fusible portion 24 are exposed outside the resin member 26 ( Figure 7 , Fig.10 and Fig.11 ). Therefore, in the circuit branching component (circuit protection component) 20, the resin component 26 is formed integrally with the circuit branching member (circuit protection member) 21 using a synthetic resin material in a state where the power supply connection portion 22, the load connection portion 23, and the fusible portion 24 are exposed. In addition, in the circuit branching component (circuit protection component) 20, a transparent resin cover 27 made of a synthetic resin material that covers the exposed fusible portion 24 is assembled to the resin component 26 ( Figure 7 and Fig.10 ).

[0043] The electrical junction box 1 includes a power supply side electrical connection structure 70 (which physically and electrically connects the power supply side terminal fitting TB at the end of the power supply side electric wire WB, the second electrical connection portion 62 of the internal conductive member 60, and the power supply connection portion 22 of the circuit branching member (circuit protection member) 21. Figure 2 , Figure 5 , Figure 6 and Figure 8 ). The power supply side electrical connection structure 70 is arranged outside the frame 40 outside the cylinder of the cylinder 41. Therefore, the power supply side electrical connection structure 70 physically and electrically connects the power supply side terminal fitting TB at the end of the power supply side wire WB, the second electrical connection portion 62 of the internal conductive component 60, and the power supply connection portion 22 of the circuit branch member (circuit protection member) 21 outside the frame 40.

[0044] The power supply side electrical connection structure 70 shown here comprises: an external thread member 71; a thread holding member 72 for holding the external thread member 71 in a state where the external thread portion is exposed; and an internal thread member 73 ( Figure 5 , Figure 6 and Figure 8The power supply side electrical connection structure 70 is configured such that the external threaded portion of the external threaded component 71 is inserted into the through holes TBa, 62a, 22a provided in the power supply side terminal fitting TB, the second electrical connection portion 62 of the internal conductive component 60, and the power supply connection portion 22 of the circuit branch member (circuit protection member) 21, respectively, and the internal threaded component 73 is screwed into the external threaded portion, thereby fastening and fixing the power supply side terminal fitting TB, the second electrical connection portion 62 of the internal conductive component 60, and the power supply connection portion 22 of the circuit branch member (circuit protection member) 21 together ( Figure 5 , Figure 6 and Figure 8 ).

[0045] Here, in the power supply side electrical connection structure 70, the external thread component 71 is configured in such a manner that the thread axis of the external thread portion is aligned with the vertical direction (i.e., the vertical direction of the vehicle) and the external thread portion protrudes from the thread retaining component 72 toward the vertical upper side (i.e., above the vehicle).

[0046] In addition, the electrical connection box 1 includes a load-side electrical connection structure 75 ( ) for physically and electrically connecting the load-side terminal fitting TL at the end of the load-side electric wire WL and the load connection portion 23 of the circuit branch member (circuit protection member) 21 to each other. Figure 4 , Figure 7 and Fig.10 ). The load-side electrical connection structure 75 is arranged outside the frame 40 outside the cylinder of the cylinder 41. Thus, the load-side electrical connection structure 75 physically and electrically connects the load-side terminal fitting TL at the end of the load-side wire WL to the load connection portion 23 of the circuit branch member (circuit protection member) 21 outside the frame 40.

[0047] The load-side electrical connection structure 75 shown here includes an external thread member 76 and an internal thread member 77 ( Figure 7 and Fig.10 In the external thread member 76, the external thread portion of the external thread member 76 is inserted into the through hole 23a ( Fig.11 ) and the resin member 26 is integrally formed with the external thread portion. In addition, the resin member 26 has a holding portion 26a ( Figures 3 to 5 , Figure 7 and Fig.10The load-side electrical connection structure 75 is formed by inserting the external thread portion of the external thread component 76 into the through hole TLa provided in the load-side terminal fitting TL and screwing the internal thread component 77 with the external thread portion, thereby fastening and fixing the load-side terminal fitting TL and the load connection portion 23 of the circuit branch member (circuit protection member) 21 together ( Figure 7 and Fig.10 Based on this, the load-side electrical connection structure 75 makes the load-side terminal fitting TL and the exposed surface 23b of the load connecting portion 23 come into close contact with each other, so that they are physically and electrically connected to each other.

[0048] Specifically, the circuit branching component (circuit protection component) 20 is arranged outside the frame 40 as follows.

[0049] The frame 40 has a recessed portion 42 ( 41 ) in which the circuit branching component (circuit protection component) 20 is disposed by recessing the outer wall forming the outer frame toward the inner side of the tube portion 41. Figure 2 , Figure 3 , Figure 5 and Fig.12 ). The recess 42 is preferably formed to have a volume equal to or larger than the size of the circuit branch component (circuit protection component) 20, and can accommodate the circuit branch component (circuit protection component) 20 without exceeding. For example, the cylinder wall 41c of the cylinder 41 has an opposing wall body 41f arranged outside the cylinder to face the circuit branch component (circuit protection component) 20. The recess 42 is formed by making the opposing wall body 41f recessed toward the inside of the cylinder.

[0050] In addition, the frame 40 has a sub-tube portion 43, which has an opening 43a arranged in the same direction as an opening 41a in the tube portion 41 and has a shape that bulges from the tube wall 41c of the tube portion 41 to the outside of the frame 40 ( Figures 1 to 3 , Figure 5 , Fig. 9 and Fig.12 ). The secondary cylinder portion 43 is disposed in the recess 42 of the frame 40. The secondary cylinder portion 43 shown here is formed as a cylinder with openings at both ends (openings 43a, 43b). Therefore, in the secondary cylinder portion 43, one opening 43a is arranged on the side of one opening 41a of the cylinder portion 41, and the other opening 43b is arranged on the side of the other opening 41b of the cylinder portion 41.

[0051] A power supply side electrical connection structure 70 is provided in the cylinder of the secondary cylinder portion 43. In the secondary cylinder portion 43, the threaded retaining component 72 of the power supply side electrical connection structure 70 is accommodated in the cylinder, and the external threaded portion of the external threaded component 71 in the power supply side electrical connection structure 70 is made to protrude from an opening 43a. Therefore, the second electrical connection portion 62 of the internal conductive component 60 makes the external threaded portion of the external threaded component 71 protruding from an opening 43a of the secondary cylinder portion 43 be inserted into the through hole 62a. Therefore, the cylinder wall 41c of the cylinder portion 41 has a cutout 44 ( Figure 5 and Figure 6 The cutout 44 is a cutout formed by cutting the tube wall 41c of the tube portion 41 from the end portion on the other opening 41b side toward the one opening 41a.

[0052] The block 30 has a protruding block portion 32 ( 40 ) which protrudes from the notch 44 to the outside of the cylinder 41 and is received in the cylinder of the secondary cylinder 43. Figure 5 , Figure 6 and Figure 8 ). A screw holding member 72 is assembled to the protruding block portion 32, thereby holding the power supply side electrical connection structure 70.

[0053] In the electric connection box 1, the external threaded portion of the external threaded member 71 of the power supply side electrical connection structure 70 is inserted through the through hole 62a of the second electrical connection portion 62 of the internal conductive member 60, while the internal conductive member 60 is held in the block body 31 and the power supply side electrical connection structure 70 is held in the protruding block portion 32. In the electric connection box 1, the block body 31 holding the internal conductive member 60 is inserted into the cylinder of the cylinder portion 41 from the other opening 41b, and the protruding block portion 32 holding the power supply side electrical connection structure 70 is inserted into the cylinder of the secondary cylinder portion 43 from the other opening 43b together with the second electrical connection portion 62 of the internal conductive member 60.

[0054] In the electric connection box 1, the external thread portion of the external thread component 71 is inserted into the through hole 22a, and the power connection portion 22 of the circuit branch member (circuit protection member) 21 is assembled to the power side electrical connection structure 70, and the external thread portion of the external thread component 71 is inserted into the through hole TBa, and the power side terminal fitting TB is assembled to the power side electrical connection structure 70. In addition, in the electric connection box 1, the internal thread component 73 is screwed into the external thread portion of the external thread component 71, and the power side terminal fitting TB, the second electrical connection portion 62 of the internal conductive component 60, and the power connection portion 22 of the circuit branch member (circuit protection member) 21 are fastened and fixed together. In the electric connection box 1, the power side terminal fitting TB and the circuit branch member (circuit protection member) 20 are assembled to the block 30 via the power side electrical connection structure 70.

[0055] One opening 43a of the secondary barrel 43 is covered by the first cover member 51 assembled to the frame 40 together with the power supply side terminal fitting TB, the second electrical connection portion 62 of the internal conductive member 60, the power supply connection portion 22 of the circuit branch component (circuit protection component) 21, and the power supply side electrical connection structure 70, and is accommodated in the first cover member 51. In addition, the first cover member 51 covers the recessed portion 42 of the frame 40, and the circuit branch component (circuit protection component) 20 in the recessed portion 42 is accommodated in the space between the first cover member 51 and the recessed portion 42.

[0056] The other opening 43b of the secondary cylinder portion 43 is closed by a closing portion 53 provided on a second cover member 52 assembled to the frame 40 so as not to be exposed to the outside of the frame 40 ( Figure 1 , Figure 3 , Fig. 9 and Fig.13 ).

[0057] Here, the circuit branching component (circuit protection component) 20 is arranged such that the exposed surface 23b of the load connecting portion 23 is opposite to the opposing wall 41f, and the exposed surface 23b is interposed between the holding portion 26a of the resin component 26 and the opposing wall 41f ( Figure 7 ). The circuit branching component (circuit protection component) 20 is configured such that the exposed surfaces 23b of all the load connection parts 23 are opposite to the opposing wall 41f. That is, in the circuit branching component (circuit protection component) 20, all the load-side electrical connection structures 75 are arranged at a position closer to the opposing wall 41f than the retaining portion 26a. Therefore, the load-side electrical connection structure 75 physically and electrically connects the load-side terminal fitting TL at the end of the load-side wire WL and the load connection part 23 of the circuit branching component (circuit protection component) 21 at a position closer to the opposing wall 41f than the retaining portion 26a. Thus, in the electrical junction box 1, the circuit branching component (circuit protection component) 20 is assembled in a state where the load-side electrical connection structure 75 is hidden between the retaining portion 26a of the resin component 26 and the opposing wall 41f. Therefore, in the electrical connection box 1, when the first cover member 51 is removed, it is possible to prevent other components from coming into contact with the load-side electrical connection structure 75, the load-side terminal fitting TL, and the load connection portion 23 of the circuit branch member (circuit protection member) 21. Therefore, when performing, for example, assembling work of peripheral components or maintenance work of peripheral components, the electrical connection box 1 can prevent other components such as metal components and tools from coming into contact with the load-side electrical connection structure 75, etc., thereby preventing the conduction of electricity between other components and the load-side electrical connection structure 75, etc.

[0058] In addition, the circuit branching component (circuit protection component) 20 is configured such that the power connection portion 22 exposed from the resin component 26 is located closer to the opposing wall 41f side than the resin component 26 when the power connection portion 22 is assembled to the power supply side electrical connection structure 70 ( Figure 6 ). That is, in the circuit branching component (circuit protection component) 20, the power supply side electrical connection structure 70 is provided at a position closer to the opposing wall 41f than the resin component 26. Therefore, the power supply side electrical connection structure 70 physically and electrically connects the power supply side terminal fitting TB at the end of the power supply side wire WB, the second electrical connection portion 62 of the internal conductive component 60, and the power supply connection portion 22 of the circuit branching component (circuit protection component) 21 at a position closer to the opposing wall 41f than the resin component 26. Thus, in the electrical connection box 1, the circuit branching component (circuit protection component) 20 is assembled in a state where the power supply side electrical connection structure 70 is hidden between the resin component 26 and the opposing wall 41f. Therefore, in the electric connection box 1, when the first cover member 51 is removed, it is possible to prevent other components from coming into contact from the side with the power supply side electric connection structure 70, the power supply side terminal fitting TB at the end of the power supply side electric wire WB, the second electric connection portion 62 of the internal conductive member 60, and the power supply connection portion 22 of the circuit branch member (circuit protection member) 21. Therefore, when the electric connection box 1 is performing, for example, an assembly operation of peripheral components or maintenance operation of peripheral components, it is possible to prevent other components such as metal components and tools from coming into contact from the side with the power supply side electric connection structure 70, etc., thereby preventing the conduction of electricity between other components and the load side electric connection structure 75, etc.

[0059] In the electric connection box 1, all the core wires of the power supply side wire WB and the load side wire WL may be formed of copper or a copper alloy. However, it is preferred that at least one of the core wires of the power supply side wire WB and the load side wire WL is formed of aluminum or an aluminum alloy in order to achieve weight reduction. For example, the power supply side wire WB and the load side wire WL may have all the core wires formed of aluminum or an aluminum alloy, or at least one of the core wires may be formed of aluminum or an aluminum alloy and the remaining core wires may be formed of copper or a copper alloy.

[0060] When the core wires of the power-side wire WB and the load-side wire WL are formed of aluminum or aluminum alloy, it is possible to achieve weight reduction compared to when the core wires are formed of copper or copper alloy, but they become thick and hard to bend due to the large current. However, in the electrical connection box 1, the circuit branching component (circuit protection component) 20 is arranged outside the frame 40 outside the barrel of the barrel 41, and the power-side wire WB and the load-side wire WL that are difficult to bend are laid outside the frame 40. Therefore, the electrical connection box 1 can suppress the overload of the power-side wire WB and the like on the periphery in the frame, and can also improve the accommodation of other wires in the barrel of the barrel 41.

[0061] Specifically, the electric connection box 1 shown here includes a first internal conductive member 60A and a second internal conductive member 60B as the internal conductive member 60, and the first internal conductive member 60A and the second internal conductive member 60B are held by the block 30 ( Figure 5 and Figure 8 Here, as the internal conductive component 60, two types of first internal conductive components 60A are provided.

[0062] In addition, the circuit branching member (circuit protection member) 21 shown here includes a first power connection portion 22A and a second power connection portion 22B as the power connection portion 22, and the first power connection portion 22A and the second power connection portion 22B are electrically connected to the first power side wire WB1 and the second power side wire WB2 as the power side wire WB, respectively ( Figure 5 , Fig.10 and Fig.11 ). In the circuit branching member (circuit protection member) 21, the first power connection portion 22A and the second power connection portion 22B are connected by a connection portion 25, and the fusible portion 24 is connected to the first power connection portion 22A and the second power connection portion 22B via the connection portion 25. That is, the fusible portion 24 is interposed between the first power connection portion 22A and the load connection portion 23, and between the second power connection portion 22B and the load connection portion 23.

[0063] When viewed from the circuit branch member (circuit protection member) 21, the first power supply side wire WB1 is interposed between the first power supply connection portion 22A and the external power supply B, and electrically connects the first power supply connection portion 22A to the external power supply B. In addition, the second power supply side wire WB2 is electrically connected to an external electrical component P such as an AC generator and a DC-DC converter disposed outside the frame, and is electrically connected to the external power supply B via the circuit branch member (circuit protection member) 21 and the first power supply side wire WB1. That is, the second power supply side wire WB2 electrically connects the external electrical component P to the external power supply B via the circuit branch member (circuit protection member) 21 and the first power supply side wire WB1.

[0064] The first power connection portion 22A physically and electrically connects the power supply side terminal fitting TB at the end of the first power supply side wire WB1 to the second electrical connection portion 62 of the first internal conductive component 60A. The electrical junction box 1 includes a first power supply side electrical connection structure 70A as a power supply side electrical connection structure 70, and the first power supply side electrical connection structure 70A physically and electrically connects the power supply side terminal fitting TB at the end of the first power supply side wire WB1, the second electrical connection portion 62 of the first internal conductive component 60A, and the first power supply connection portion 22A of the circuit branching member (circuit protection member) 21 to each other. Figure 2 , Figure 5 , Figure 6 and Figure 8). The first power supply side electrical connection structure 70A is configured to fasten and fix the power supply side terminal fitting TB, the second electrical connection part 62 of the first internal conductive component 60A, and the first power supply connection part 22A of the circuit branch component (circuit protection component) 21 together by inserting the external thread part of the external thread part 71 through the through holes TBa, 62a, 22a of each of the power supply side terminal fitting TB at the end of the first power supply side wire WB1, the second electrical connection part 62 of the first internal conductive component 60A, and the first power supply connection part 22A of the circuit branch component (circuit protection component) 21, and screwing the internal thread part 73 with the external thread part. Here, the power supply side terminal fitting TB, the second electrical connection parts 62 of each of the two first internal conductive components 60A, and the first power supply connection part 22A of the circuit branch component (circuit protection component) 21 are fastened and fixed together.

[0065] The frame 40 shown here has a first sub-tube portion 43A as the sub-tube portion 43, and the first sub-tube portion 43A is provided with an opening (one opening 43a) opening in the same direction as the one opening 41a of the tube portion 41 ( Figures 1 to 3 , Figure 5 , Figure 6 , Fig. 9 and Fig.12 ). The first sub-cylinder portion 43A accommodates the first power supply side electrical connection structure 70A in the cylinder, and makes the external thread portion of the external thread component 71 in the first power supply side electrical connection structure 70A protrude from an opening 43a. The first sub-cylinder portion 43A is set in the recess 42 of the frame 40. A first cutout 44A is provided as the cutout 44 on the cylinder wall 41c of the cylinder portion 41, and the first cutout 44A makes the inside of the cylinder of the cylinder portion 41 communicate with the inside of the cylinder of the first sub-cylinder portion 43A, and makes the second electrical connection portion 62 of the first internal conductive component 60A protrude outside the cylinder of the cylinder portion 41 to the outside of the frame 40 ( Figure 5 and Figure 6 ). In addition, the block 30 is provided with a first protruding block portion 32A as a protruding block portion 32 for assembling the threaded retaining member 72 of the first power supply side electrical connection structure 70A. The first protruding block portion 32A protrudes from the first cutout 44A to the outside of the cylinder 41 and is received in the cylinder of the first sub-cylinder portion 43A ( Figure 5 , Figure 6 and Figure 8 ).

[0066] In the electrical connection box 1, the first protruding block 32A, the first power supply side electrical connection structure 70A and the second electrical connection portions 62 of the two first internal conductive members 60A are accommodated in the cylinder of the first sub-cylindrical portion 43A, with the external thread portion of the external thread member 71 extending from one opening 43a of the first sub-cylindrical portion 43A. Figure 6 ).

[0067] The second power connection portion 22B physically and electrically connects the power supply side terminal fitting TB at the end of the second power supply side wire WB2 to the second electrical connection portion 62 of the second internal conductive component 60B. The electrical connection box 1 includes a second power supply side electrical connection structure 70B as the power supply side electrical connection structure 70, and the second power supply side electrical connection structure 70B physically and electrically connects the power supply side terminal fitting TB at the end of the second power supply side wire WB2, the second electrical connection portion 62 of the second internal conductive component 60B, and the second power supply connection portion 22B of the circuit branching member (circuit protection member) 21 to each other. Figure 2 , Figure 5 and Figure 8 The second power supply side electrical connection structure 70B is configured such that the external threaded portion of the external threaded component 71 is inserted into the through holes TBa, 62a, 22a of the power supply side terminal fitting TB at the end of the second power supply side wire WB2, the second electrical connection portion 62 of the second internal conductive component 60B, and the second power supply connection portion 22B of the circuit branch member (circuit protection member) 21, respectively, and the internal threaded component 73 is screwed into the external threaded portion, thereby fastening and fixing the power supply side terminal fitting TB, the second electrical connection portion 62 of the second internal conductive component 60B, and the second power supply connection portion 22B of the circuit branch member (circuit protection member) 21 together.

[0068] The frame 40 shown here has a second sub-tube portion 43B as the sub-tube portion 43, and the second sub-tube portion 43B is provided with an opening (one opening 43a) opening in the same direction as the one opening 41a of the tube portion 41 ( Figures 1 to 3 , Figure 5 , Fig. 9 and Fig.12 ). The second sub-cylinder portion 43B accommodates the second power supply side electrical connection structure 70B in the cylinder, and makes the external thread portion of the external thread component 71 in the second power supply side electrical connection structure 70B protrude from an opening 43a. The second sub-cylinder portion 43B is arranged in the recess 42 of the frame 40. A second cutout 44B is provided as the cutout 44 on the cylinder wall 41c of the cylinder portion 41, and the second cutout 44B makes the inside of the cylinder of the cylinder portion 41 communicate with the inside of the cylinder of the second sub-cylinder portion 43B, and makes the second electrical connection portion 62 of the second internal conductive component 60B protrude outside the cylinder of the cylinder portion 41 to the outside of the frame 40 ( Figure 5 ). In addition, the block 30 is provided with a second protruding block portion 32B as a protruding block portion 32 for assembling the threaded retaining member 72 of the second power supply side electrical connection structure 70B, and the second protruding block portion 32B protrudes from the second notch 44B to the outside of the cylinder 41 and is accommodated in the cylinder of the second sub-cylinder portion 43B ( Figure 5 and Figure 8 ).

[0069] In the electrical junction box 1, the second protruding block portion 32B, the second power supply side electrical connection structure 70B and the second electrical connection portion 62 of the second internal conductive component 60B are accommodated in the tube of the second sub-tube portion 43B while the external thread portion of the external thread component 71 is extended from an opening 43a of the second sub-tube portion 43B.

[0070] In the electrical junction box 1, the external threaded portion of the external threaded component 71 of the first power supply side electrical connection structure 70A is inserted into the through hole 22a of the first power supply connection part 22A, and the first power supply connection part 22A is assembled to the first power supply side electrical connection structure 70A, and the external threaded portion of the external threaded component 71 of the second power supply side electrical connection structure 70B is inserted into the through hole 22a of the second power supply connection part 22B, and the second power supply connection part 22B is assembled to the second power supply side electrical connection structure 70B. Furthermore, in the electrical junction box 1, the external threaded portion of the external threaded component 71 of the first power side electrical connection structure 70A is inserted into the through hole TBa of the power side terminal accessory TB of the first power side wire WB1, and the power side terminal accessory TB is assembled to the first power side electrical connection structure 70A, and the external threaded portion of the external threaded component 71 of the second power side electrical connection structure 70B is inserted into the through hole TBa of the power side terminal accessory TB of the second power side wire WB2, and the power side terminal accessory TB is assembled to the second power side electrical connection structure 70B. In the electric connection box 1, the internal thread parts 73 are screwed into the external thread parts of the external thread parts 71, respectively, and the power supply side terminal fittings TB of the first power supply side wire WB1, the second electrical connection parts 62 of the two first internal conductive parts 60A, and the first power supply connection part 22A of the circuit branching member (circuit protection member) 21 are fastened and fixed together, and the power supply side terminal fittings TB of the second power supply side wire WB2, the second electrical connection part 62 of the second internal conductive part 60B, and the second power supply connection part 22B of the circuit branching member (circuit protection member) 21 are fastened and fixed together. In the electric connection box 1, the two power supply side terminal fittings TB and the circuit branching member (circuit protection member) 20 are assembled to the block 30 via the first power supply side electrical connection structure 70A and the second power supply side electrical connection structure 70B.

[0071] An opening 43a of each of the first sub-barrel portion 43A and the second sub-barrel portion 43B, together with two power supply side terminal accessories TB, the second electrical connection portions 62 of each of the two first internal conductive components 60A and the second internal conductive components 60B, the first power supply connection portion 22A and the second power supply connection portion 22B of the circuit branch component (circuit protection component) 21, the first power supply side electrical connection structure 70A and the second power supply side electrical connection structure 70B, are covered by the first cover component 51 and are housed in the first cover component 51.

[0072] The second cover member 52 includes a first sealing portion 53A and a second sealing portion 53B as the sealing portion 53. The first sealing portion 53A seals the other opening 43b of the first sub-tube portion 43A so as not to be exposed to the outside of the frame 40, and the second sealing portion 53B seals the other opening 43b of the second sub-tube portion 43B so as not to be exposed to the outside of the frame 40. Figure 1 , Figure 3 , Fig. 9 and Fig.13 ). The first closing portion 53A and the second closing portion 53B may be a plate-shaped wall portion that closes the other opening 43b together with the first cutout 44A and the second cutout 44B from the outside of the frame 40, or may be composed of a plurality of wall portions that surround and cover the other opening 43b together with the first cutout 44A and the second cutout 44B from the outside of the frame 40. Here, the first split cover 52A is assembled to the periphery of the other opening 41b of the barrel 41 provided with the first sub-barrel portion 43A and the second sub-barrel portion 43B. Therefore, the first closing portion 53A and the second closing portion 53B are provided on the first split cover 52A.

[0073] Here, the circuit branching component (circuit protection component) 20 is in a state where the first power supply connection portion 22A is assembled to the first power supply side electrical connection structure 70A and the second power supply connection portion 22B is assembled to the second power supply side electrical connection structure 70B, and the exposed surfaces 23b of all the load connection portions 23 are arranged opposite to the opposing wall 41f, so that the exposed surfaces 23b are interposed between the retaining portion 26a of the resin component 26 and the opposing wall 41f ( Figure 7 ). Therefore, the entire load-side electrical connection structure 75 physically and electrically connects the load-side terminal fitting TL at the end of the load-side electric wire WL and the load connection portion 23 of the circuit branch member (circuit protection member) 21 at a position closer to the opposing wall 41f than the retaining portion 26a. Therefore, in the electrical connection box 1, when the first cover member 51 is removed, it is possible to prevent other components from contacting the load-side electrical connection structure 75, the load-side terminal fitting TL, and the load connection portion 23 of the circuit branch member (circuit protection member) 21.

[0074] In addition, the circuit branching component (circuit protection component) 20 is configured such that the first power connection portion 22A and the second power connection portion 22B are exposed from the resin component 26 at a position closer to the opposing wall 41f than the resin component 26 when the first power connection portion 22A is assembled to the first power side electrical connection structure 70A and the second power connection portion 22B is assembled to the second power side electrical connection structure 70B. Figure 6). Therefore, the first power supply side electrical connection structure 70A physically and electrically connects the power supply side terminal fitting TB at the end of the first power supply side wire WB1, the second electrical connection parts 62 of each of the two first internal conductive parts 60A, and the first power supply connection part 22A of the circuit branch member (circuit protection member) 21 at a position closer to the opposing wall 41f than the resin part 26. Moreover, the second power supply side electrical connection structure 70B physically and electrically connects the power supply side terminal fitting TB at the end of the second power supply side wire WB2, the second electrical connection part 62 of the second internal conductive part 60A, and the second power supply connection part 22B of the circuit branch member (circuit protection member) 21 at a position closer to the opposing wall 41f than the resin part 26. Therefore, in the electrical junction box 1, when the first cover part 51 is removed, it is possible to prevent other parts from contacting from the side with the first power supply side electrical connection structure 70A, the second power supply side electrical connection structure 70B, the power supply side terminal fitting TB at the end of the first power supply side wire WB1, the power supply side terminal fitting TB at the end of the second power supply side wire WB2, the second electrical connection parts 62 of each of the two first internal conductive parts 60A, the second electrical connection part 62 of the second internal conductive part 60A, the first power supply connection part 22A and the second power supply connection part 22B of the circuit branch member (circuit protection member) 21.

[0075] As described above, the electric connection box 1 of this embodiment arranges the circuit branching component (circuit protection component) 20 outside the barrel of the barrel 41 outside the frame 40, so that the power side wire WB (first power side wire WB1, second power side wire WB2) and the load side wire WL connected to the circuit branching component (circuit protection component) 20 can be suppressed from overloading the periphery in the frame. In particular, in the electric connection box 1, the larger the wire diameter, the more difficult it is for the power side wire WB (first power side wire WB1, second power side wire WB2) and the load side wire WL to bend, so the overloading of the power side wire WB and the like on the periphery in the frame can be suppressed. For example, in the electric connection box 1, by suppressing the overloading of the power side wire WB and the like on the second cover member 52 in the frame, the deformation of the second cover member 52 can be suppressed. In addition, by arranging the power side wire WB and the like, which are difficult to bend, outside the frame 40, the electric connection box 1 can improve the accommodation of other wires in the barrel of the barrel 41. In addition, the electric junction box 1 can suppress the temperature rise in the frame by arranging the power supply side wire WB and the like outside the frame 40, so that the heat generated by the power supply side wire WB and the like will not be retained in the frame. Moreover, the electric junction box 1 has these effects, and the connection parts (first power supply side electrical connection structure 70A, second power supply side electrical connection structure 70B, etc.) of the circuit branch component (circuit protection component) 20 that are physically and electrically connected are arranged at a position closer to the frame side than the resin component 26, so that other components can be suppressed from contacting the connection parts.

[0076] Description of Reference Numerals

[0077] 1 Electrical junction box

[0078] 10 Electronic components

[0079] 20 Circuit branch components (circuit protection components)

[0080] 21 Circuit branch components (circuit protection components)

[0081] 22 Power connection

[0082] 22A First power connection

[0083] 22B Second power supply connection

[0084] 23 Load connection

[0085] 23b Show your face

[0086] 24 Fusible part

[0087] 26 Resin parts

[0088] 26a Holding part

[0089] 40 Frames

[0090] 41 barrel

[0091] 41a an opening (opening)

[0092] 41c Cylinder wall

[0093] 41f Opposing wall

[0094] 51 first cover member (cover member)

[0095] 60 Internal conductive parts

[0096] 60A First internal conductive part

[0097] 60B Second internal conductive part

[0098] 61 first electrical connection portion

[0099] 62 second electrical connection portion

[0100] 70 Power supply side electrical connection structure

[0101] 70A First power supply side electrical connection structure

[0102] 70B Second power supply side electrical connection structure

[0103] 75 Load side electrical connection structure

[0104] B External power supply

[0105] L External load

[0106] TB Power side terminal accessories

[0107] TL Load Side Terminal Accessories

[0108] WB Power supply side wire

[0109] WB1 First power supply side wire

[0110] WB2 Second power supply side wire

[0111] WL Load side wire

Claims

1. An electrical junction box, characterized in that: have: Electronic components; an internal conductive component that electrically connects the electronic component to an external power source; A frame having a cylindrical portion, the cylindrical portion being composed of a cylindrical wall having an opening at at least one end and accommodating and holding the electronic component and the internal conductive component in the cylindrical wall; a cover member, the cover member closing the opening of the cylinder; as well as a circuit branching component, which is arranged outside the frame outside the tube of the tube portion and makes the conductive circuit branching member built in the resin component interposed between the external power source and the external load, The internal conductive component comprises: a first electrical connection portion which is physically and electrically connected to the electronic component in the cylinder of the cylinder; and a second electrical connection portion, The circuit branching member comprises: a power supply connection portion, which is exposed to the outside of the resin component and is arranged outside the tube of the barrel portion outside the frame, and physically and electrically connects the power supply side terminal fitting at the end of the power supply side electric wire electrically connected to the external power supply and the second electric connection portion of the internal conductive component; and a load connection portion, which is exposed to the outside of the resin component and is arranged outside the tube of the barrel portion outside the frame, and physically and electrically connects to the load side terminal fitting at the end of the load side electric wire electrically connected to the external load, The tube wall of the tube portion has an opposing wall body disposed outside the tube and opposing the circuit branching component. The resin component has a holding portion that holds the load connecting portion with its exposed surface exposed, and The circuit branching member is arranged so that the exposed surface of the load connecting portion faces the opposing wall body, and the exposed surface is interposed between the holding portion and the opposing wall body.

2. The electrical connection box according to claim 1, wherein: A load-side electrical connection structure is arranged outside the tube of the tube portion and outside the frame, and the load-side electrical connection structure physically and electrically connects the load-side terminal fitting at the end of the load-side electric wire and the load connection portion of the circuit branching member at a position closer to the opposing wall body side than the retaining portion.

3. The electrical connection box according to claim 1 or 2, wherein: The power supply connection portion exposed from the resin member is arranged at a position closer to the opposing wall body than the resin member.

4. The electrical connection box according to claim 3, wherein: A power supply side electrical connection structure is arranged outside the tube of the tube part and outside the frame, and the power supply side electrical connection structure physically and electrically connects the power supply side terminal fitting at the end of the power supply side wire, the second electrical connection part of the internal conductive component and the power supply connection part of the circuit branch component at a position closer to the opposite wall side than the resin component.

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