Electrical junction box

Abstract

A circuit branching member (20) having an electrically conductive circuit branching member (21) is disposed outside a frame (40) outside a cylinder section (41), and an electrically conductive power source-side electrical connection structure (70) is provided outside the frame. The power supply side electrical connection structure (70) can physically and electrically connect a power supply side terminal fitting (TB) at the tail end of a power supply side electric wire (WB), a second electrical connection part (62) of an internal conductive part (60), and a power supply connection part (22) of a circuit branch part material (21), and can engage a clip (C) at the tail end of a booster cable. An attachment / detachment work space for attaching / detaching the clip to / from the power-supply-side electrical connection structure is provided between the frame and the power-supply-side electrical connection structure.

Description

Technical Field

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

[0002] In an electrical connection box, electronic components such as relays interposed between an external power source such as a secondary battery 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 vehicles such as automobiles, a power supply structure for supplying power to a secondary battery whose voltage has dropped from a rescue vehicle or the like is provided. As such a power supply structure, for example, a rescue terminal electrically connected to the secondary battery in a frame of an electrical junction box is known. The rescue terminal is housed in the frame together with a power supply side terminal fitting electrically connected to the secondary battery, and is assembled to the power supply side terminal fitting. In such a conventional electrical junction box, due to the power supply structure housed in the frame, the arrangement of other components in the frame is limited.

[0008] Therefore, an object of the present invention is to provide an electric junction box that allows freedom in layout of components within 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 portion, the barrel portion is composed of a barrel wall with an opening at least at one end, and the electronic component and the internal conductive component are accommodated and held in the barrel; a cover component, the cover component is engaged with the opening peripheral edge portion of the periphery of the opening of the barrel portion and closes the opening of the barrel portion; and a circuit branching component, the circuit branching component is arranged outside the barrel of the barrel portion outside the frame and is interposed 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 portion; and a second electrical connection portion, the circuit branching component having: a power supply connection portion that is connected to the barrel portion The outer tube of the tube part is arranged outside the frame, so that the power-side terminal fitting at the end of the power-side electric wire electrically connected to the external power supply and the second electric connection part of the internal conductive component are physically and electrically connected; and the load connecting part, which electrically connects the load-side electric wire electrically connected to the external load, is provided with a conductive power-side electric connection structure outside the tube of the tube part and outside the frame, and the power-side electric connection structure can physically and electrically connect the power-side terminal fitting at the end of the power-side electric wire, the second electric connection part of the internal conductive component and the power connection part of the circuit branch component, and can engage the clamp at the end of the boost cable, and a disassembly and assembly working space for disassembling the clamp relative to the power-side electric connection structure is provided between the frame and the power-side electric connection structure.

[0011] Effects of the Invention

[0012] The electric junction box of the present invention arranges the circuit branching component outside the frame outside the tube of the tube portion, and uses the power supply side electrical connection structure outside the frame related to the circuit branching component as a power supply structure, thereby allowing freedom in the layout of components in the frame. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0014] Figure 2 This is a perspective view showing the electric junction box (without the first cover member) according to the embodiment together with the clip.

[0015] Figure 3 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.

[0016] Figure 4 This is a plan view of the electric connection box (without the first cover member) according to the embodiment as seen from the side of the frame.

[0017] Figure 5 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.

[0018] Figure 6 yes Figure 4 XX line cross-sectional view.

[0019] Figure 7 It is an exploded perspective view showing a block and an internal conductive component and an external thread component housed in the block.

[0020] Figure 8 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.

[0021] Fig. 9 This is an exploded perspective view illustrating the load-side electrical connection structure.

[0022] Fig.10 It is a perspective view showing a circuit protection member.

[0023] Fig.11 It is a perspective view showing a frame.

[0024] Fig.12 It is a perspective view showing the first cover member.

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

[0026] Fig.14 yes Figure 2 An enlarged view of part A shows an example of how the clip is installed.

[0027] Fig.15 It is an explanatory diagram showing a modified example of the mounting method of the clip. DETAILED DESCRIPTION

[0028] Hereinafter, an embodiment of the electric connection box according to the present invention will be described in detail based on the drawings. However, the present invention is not limited to the embodiment.

[0029] [Implementation Method]

[0030] based on Figures 1 to 15 One embodiment of the electric connection box according to the present invention will be described.

[0031] Figures 1 to 6 Reference numeral 1 shows 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 ).

[0032] 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 source 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 .

[0033] The electrical connection box 1 comprises: a block 30 that holds the electronic component 10; and a frame 40 having a cylinder 41, the cylinder 41 being composed of a cylinder wall 41c having openings at both ends (openings 41a, 41b) that accommodate and hold the block 30 in the cylinder. Figures 1 to 7 ). In addition, the electrical connection box 1 includes: a cover member (hereinafter referred to as a "first cover member") 51 that fits with an opening peripheral portion (hereinafter referred to as a "first opening peripheral portion") 41d of the periphery of an opening 41a in the barrel 41 and closes the opening 41a of the barrel 41; and a cover member (hereinafter referred to as a "second cover member") 52 that fits with an opening peripheral portion (hereinafter referred to as a "second opening peripheral portion") 41e of the periphery of the other opening 41b in the barrel 41 and closes the other opening 41b of the barrel 41. Figures 1 to 3 and Figure 8 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.

[0034] 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.

[0035] 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 of the frame 40 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 of the frame 40 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.

[0036] 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 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 ( Figures 1 to 3 as well as Figure 8 ).

[0037] The electrical 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 in the module 30 together with the electronic component 10 . Figures 5 to 7 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 7 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 ( Figures 5 to 7 In the internal conductive component 60, a plurality of first electrical connection parts 61 and a second electrical connection part 62 are connected via a connecting part 63 ( Figure 7 ). The internal conductive component 60 is shaped such that its 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 of the extension. That is, the second electrical connecting portion 62 is arranged outside the tube of the tube 41 and outside the frame 40.

[0038] 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, and the block body 31 holds the electronic component 10 and the internal conductive component 60 in the cylinder of the cylinder 41 ( Figures 1 to 3 , Figure 5 , Figure 7 and Figure 8 ).

[0039] 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 the electronic component 10 and the internal conductive component 60 are accommodated and held 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 may be provided in the same manner as in the previous example. On the other hand, as long as 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 may include only the first cover member 51.

[0040] 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 5 , Fig. 9 and Fig.10 ).

[0041] 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, the circuit branching component 20 shown here has a fusible portion 24 described later for cutting off an overcurrent between the external power supply B and the external load L in addition to the power supply connection portion 22 and the load connection portion 23, and 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 component 21.

[0042] The circuit branching member (circuit protection member) 21 has a power supply connection portion 22 which is arranged outside the frame 40 outside the cylinder of the cylinder 41 and 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 ( Figure 5 , Figure 6 , Fig. 9 and Fig.10 ).

[0043] In addition, the circuit branching member (circuit protection member) 21 includes: a load connecting portion 23, which is arranged outside the frame 40 outside the cylinder of the cylinder 41 and is electrically connected to the load-side wire WL electrically connected to the external load L; and a fusible portion 24, which is interposed between the power supply connecting portion 22 and the load connecting portion 23 and is melted when an overcurrent flows ( Fig. 9 and Fig.10 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.10 ). The power supply connection portion 22 and the fusible portion 24 for each external load L are connected to the connection portion 25.

[0044] 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 in 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 ( Fig. 9 and Fig.10 ). Therefore, in the circuit branch component (circuit protection component) 20, the resin component 26 is formed integrally with the circuit branch component (circuit protection component) 21 using a synthetic resin material while the power connection portion 22, the load connection portion 23, and the fusible portion 24 are exposed. In addition, in the circuit branch 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 ( Fig. 9 ).

[0045] The electrical connection box 1 includes a power supply side electrical connection structure 70 that 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 member 60, and the power supply connection portion 22 of the circuit branching member (circuit protection member) 21 to each other. Figure 2 , Figure 5 as well as Figure 7 ). 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.

[0046] The power supply side electrical connection structure 70 is a structure for fastening and fixing the power supply side terminal fitting TB at the end of the power supply side electric wire WB, the second electrical connection part 62 of the internal conductive member 60, and the power supply connection part 22 of the circuit branch member (circuit protection member) 21 together. The power supply side electrical connection structure 70 shown here includes: an external thread member 71; a thread holding member 72 that holds the external thread member 71 in a state where the external thread part is exposed; and an internal thread member 73 that is screwed with the external thread part of the external thread member 71 ( Figures 5 to 7The power supply side electrical connection structure 70 is formed by inserting the external thread portion of the external thread component 71 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 screwing the internal thread component 73 with the external thread 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 ( Figures 5 to 7 ).

[0047] Here, in the power supply side electrical connection structure 70, the external thread component 71 is arranged in a form such 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 holding component 72 toward the vertical upper side (i.e., above the vehicle).

[0048] Furthermore, the electrical connection box 1 includes a load-side electrical connection structure 75 ( Fig. 9 A load-side terminal fitting TL is installed at the end of the load-side wire WL ( Fig. 9 ). Thus, the load-side electrical connection structure 75 physically and electrically connects the load-side terminal fitting TL and the load connection portion 23 of the circuit branching member (circuit protection member) 21 to each other.

[0049] The load-side electrical connection structure 75 shown here includes: an external thread member 76; and an internal thread member 77 ( Fig. 9 In the external thread member 76, the external thread portion of the external thread member 76 is inserted into the through hole 23a ( Fig.10 ) and the resin component 26 is integrally formed in a state where the external thread portion is exposed. The 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 branching member (circuit protection member) 21 together ( Fig. 9 ).

[0050] Here, in the load-side electrical connection structure 75, the external thread member 76 is arranged in a form in which the external thread portion protrudes toward the cylinder wall 41c side of the cylinder 41. In this example, the external thread member 76 is arranged in a form in which the thread axis of the external thread portion is aligned with the orthogonal direction orthogonal to the vertical direction (that is, the vehicle up-down direction) and the external thread portion protrudes toward the cylinder wall 41c side of the cylinder 41. However, the load-side electrical connection structure 75 may be arranged in a form in which the external thread portion protrudes toward the side opposite to the cylinder wall 41c side of the cylinder 41. In this case, the external thread member 76 is arranged in a form in which the thread axis of the external thread portion is aligned with the orthogonal direction orthogonal to the vertical direction (the vehicle up-down direction) and the external thread portion protrudes toward the side opposite to the cylinder wall 41c side of the cylinder 41.

[0051] Specifically, the circuit branching component (circuit protection component) 20 is arranged outside the frame 40 as follows.

[0052] The frame 40 has a recessed portion 42 ( 20 ) 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 3 , Figure 4 , Figure 5 and Fig.11 ). 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 to be able to accommodate the circuit branch component (circuit protection component) 20 without protruding. 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.

[0053] In addition, the frame 40 has a sub-tube portion 43, which is provided with an opening 43a that opens in the same direction as one 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 5 , Figure 8 and Fig.11 ). The secondary cylinder portion 43 bulges out from the opposing wall 41f outside the cylinder portion 41 toward the outside of the frame 40. The secondary cylinder portion 43 shown here is formed as a cylinder with openings at both ends (openings 43a, 43b) bulging out from the opposing wall 41f in the recessed portion 42 of the frame 40. Therefore, in the secondary cylinder portion 43, one opening 43a is arranged on the side of one opening 41a of the cylinder portion 41 (that is, the side of the first opening peripheral portion 41d), and the other opening 43b is arranged on the side of the other opening 41b of the cylinder portion 41 (that is, the side of the second opening peripheral portion 41e).

[0054] In the cylinder of the secondary cylinder portion 43, a power supply side electrical connection structure 70 is provided in the form of an external threaded portion of an external threaded component 71 protruding from an opening 43a. 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 and the internal threaded component 73 in the power supply side electrical connection structure 70 are 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 second opening peripheral edge portion 41e toward the first opening peripheral edge portion 41d. Here, the cutout 44 is formed in the opposing wall body 41f.

[0055] The block 30 has a protruding block portion 32 ( Figures 5 to 7 ). A screw holding member 72 is assembled to the protruding block portion 32 , thereby holding the power supply side electrical connection structure 70 .

[0056] 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.

[0057] In the electric connection box 1, the external thread portion of the external thread component 71 is inserted into the through hole 22a to assemble the power connection portion 22 of the circuit branching member (circuit protection member) 21 to the power supply side electrical connection structure 70, and the external thread portion of the external thread component 71 is inserted into the through hole TBa to assemble the power supply side terminal fitting TB to the power supply 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 to fasten and fix the power supply side terminal fitting TB, 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 together. In the electric connection box 1, the power supply side terminal fitting TB and the circuit branching member (circuit protection member) 20 are assembled to the block 30 via the power supply side electrical connection structure 70.

[0058] 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 accommodates the circuit branch component (circuit protection component) 20 in the recessed portion 42 in the space between the first cover member 51 and the recessed portion 42.

[0059] Specifically, the first cover member 51 includes: a cover body 51a, which is arranged opposite to an opening 41a of the barrel 41; an annular outer wall body 51b, which covers the first opening peripheral edge portion 41d from the outside of the barrel 41; a closed wall body 51c, which closes the gap between the cover body 51a and the outer wall body 51b; an annular inner wall body 51d, which is arranged on the inner side of the outer wall body 51b with a gap therebetween and is fitted with the first opening peripheral edge portion 41d; and a waterproof cover wall body 51e, which protrudes from the outer wall body 51b to a position between the waterproof cover wall body 51e and the barrel wall 41c of the barrel 41 to cover the power supply side electrical connection structure 70 ( Fig.12 ).

[0060] 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 4 , Figure 8 and Fig.13 ).

[0061] However, in this electrical connection box 1, a power supply structure for supplying power to a secondary battery (external power supply B) whose voltage has dropped from a rescue vehicle or the like is provided outside the frame 40. Here, the power supply side electrical connection structure 70 is made conductive and used as the power supply structure. Therefore, the power supply side electrical connection structure 70 is configured to allow the clamp C at the end of the boost cable to be engaged ( Figure 2 and Fig.14 ).

[0062] Therefore, first, in the power supply side electrical connection structure 70, the external thread member 71 and the internal thread member 73 are formed of conductive materials such as metal, and the clamp C clamps the internal thread member 73 ( Figure 2 and Fig.14 ). The clamp C clamps the internal thread component 73 from the side. In addition, a disassembly and assembly work space for disassembling the clamp C relative to the power-side electrical connection structure 70 is provided between the frame 40 and the power-side electrical connection structure 70. For example, in order to provide the disassembly and assembly work space, the frame 40 is formed into a shape that can ensure a disassembly and assembly work space between it and the power-side electrical connection structure 70. In addition, the power-side electrical connection structure 70 is arranged at a position that can ensure a disassembly and assembly work space between it and the frame 40 in order to provide the disassembly and assembly work space.

[0063] Here, the circuit branch component (circuit protection component) 20 may be provided with a non-contact portion 28, which is arranged at a distance from the side surface of the internal thread component 73 in a state where the power supply connection portion 22 is fastened and fixed together, and can be clamped by the clamp C together with the internal thread component 73 ( Figure 5 , Figure 6 , Fig. 9 , Fig.10 and Fig.15 ). The non-contact portion 28 protrudes from the resin component 26 and is connected to the power connection portion 22. The non-contact portion 28 is provided in the circuit branch member (circuit protection member) 21. Here, the non-contact portion 28 is bent 90 degrees vertically upward (above the vehicle) relative to the power connection portion 22, so that the inner wall surface of the cylinder wall 41c side (opposing wall body 41f side) of the cylinder 41 in the non-contact portion 28 is arranged opposite to the side surface of the internal thread component 73 at a distance. The clamp C clamps the internal thread component 73 and the non-contact portion 28 together from the side surface of the internal thread component 73 and the outer wall surface of the non-contact portion 28.

[0064] 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 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 aluminum alloy in order to achieve weight reduction. For example, the power supply side wire WB and the load side wire WL may be wires whose all core wires are formed of aluminum or aluminum alloy, or wires whose at least one core wire is formed of aluminum or aluminum alloy and the remaining core wires are formed of copper or copper alloy.

[0065] When the core wires of the power supply 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 the case where the core wires are formed of copper or copper alloy, but they become thick and hard to bend in response to large currents. However, in the electric 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 supply side wire WB and the load side wire WL that are difficult to bend are laid outside the frame 40. Therefore, the electric connection box 1 can suppress the overload of the power supply 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.

[0066] 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 7 Here, two types of first internal conductive components 60A are provided as the internal conductive components 60 .

[0067] 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. 9 and Fig.10 ). 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.

[0068] When viewed from the circuit branching 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 branching 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 branching member (circuit protection member) 21 and the first power supply side wire WB1.

[0069] 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 member 60A. The electrical connection 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 member 60A, and the first power supply connection portion 22A of the circuit branching member (circuit protection member) 21 to each other. Figure 3 and Figures 5 to 7 ). The first power supply side electrical connection structure 70A is configured such that the external threaded portion of the external threaded component 71 is inserted through the through holes TBa, 62a, 22a of 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 connection portion 22A of the circuit branch member (circuit protection member) 21, 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 first internal conductive component 60A, and the first power connection portion 22A of the circuit branch member (circuit protection member) 21 together. Here, the power supply side terminal fitting TB, the second electrical connection portions 62 of the two first internal conductive components 60A, and the first power connection portion 22A of the circuit branch member (circuit protection member) 21 are fastened and fixed together.

[0070] 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) that opens in the same direction as the one opening 41a of the tube portion 41 ( Figures 1 to 6 , Figure 8 and Fig.11). 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 and the internal thread component 73 in the first power supply side electrical connection structure 70A protrude from an opening 43a. The first sub-cylinder portion 43A is disposed in the recess 42 of the frame 40. A first cutout 44A is provided as a cutout 44 on the cylinder wall 41c of the cylinder portion 41, and the first cutout 44A makes the inside of its own cylinder communicate with the inside 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 of the threaded retaining member 72 assembled with the first power supply side electrical connection structure 70A, and the first protruding block portion 32A protrudes from the first notch 44A to the outside of the cylinder 41 and is accommodated in the cylinder of the first sub-cylindrical portion 43A ( Figures 5 to 7 ).

[0071] In the electrical connection box 1, the first protruding block portion 32A, the first power supply side electrical connection structure 70A and the second electrical connection portions 62 ( 100 ) of the two first internal conductive members 60A are accommodated in the first sub-tube portion 43A in a state where the external thread portion of the external thread member 71 extends from one opening 43a of the first sub-tube portion 43A. Figure 6 ).

[0072] Here, in the electrical connection box 1, the first power supply side electrical connection structure 70A is used as a power supply structure ( Figure 2 and Fig.14 ). Therefore, in the electric connection box 1, the internal thread member 73 of the first power supply side electrical connection structure 70A can be clamped from the side by the clamp C ( Figure 2 and Fig.14 ), or the internal thread member 73 and the non-contact portion 28 connected to the first power supply connection portion 22A are clamped together from the side surface of the internal thread member 73 and the outer wall surface of the non-contact portion 28 ( Figure 5 , Figure 6 , Fig. 9 , Fig.10 and Fig.15 ).

[0073] 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 electric wire WB2 to the second electrical connection portion 62 of the second internal conductive member 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 electric wire WB2, the second electrical connection portion 62 of the second internal conductive member 60B, and the second power supply connection portion 22B of the circuit branch member (circuit protection member) 21 to each other. Figure 3 , Figure 5 and Figure 7 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, 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.

[0074] 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) that opens in the same direction as the one opening 41a of the tube portion 41 ( Figures 1 to 5 , Figure 8 and Fig.11 ). 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 set 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 its own cylinder 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 of the threaded retaining member 72 assembled with 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 7 ).

[0075] 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-cylinder portion 43B while the external thread portion of the external thread component 71 is extended from an opening 43a of the second sub-cylinder portion 43B.

[0076] 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 threaded components 73 are screwed into the external threaded portions of the external threaded components 71, respectively, so that the power supply side terminal fittings TB of the first power supply side wire WB1, the second electrical connection portions 62 of the two first internal conductive components 60A, and the first power supply connection portion 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 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 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.

[0077] The opening 43a of each of the first sub-barrel portion 43A and the second sub-barrel portion 43B is covered by the first cover member 51 together with the two power supply side terminal fittings TB, the second electrical connection portions 62 of each of the two first internal conductive members 60A and the second internal conductive members 60B, the first power supply connection portion 22A and the second power supply connection portion 22B of the circuit branch member (circuit protection member) 21, the first power supply side electrical connection structure 70A and the second power supply side electrical connection structure 70B, and is housed in the first cover member 51. Therefore, in the electrical connection box 1, when the clip C is engaged with the first power supply side electrical connection structure 70A, the first cover member 51 is removed.

[0078] 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 2 , Figure 4 , Figure 8 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.

[0079] 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 connection box 1 can suppress the temperature rise in the frame by laying the power supply side wires WB and the like outside the frame 40, so that the heat generated by the power supply side wires WB and the like does not remain in the frame. Moreover, the electric connection box 1 has these effects, and uses the power supply side electrical connection structure 70 (first power supply side electrical connection structure 70A) outside the frame 40 related to the circuit branching component (circuit protection component) 20 as a power supply structure, so that the layout of components in the frame can be free.

[0080] Explanation of symbols

[0081] 1 Electrical junction box

[0082] 10 Electronic components

[0083] 20 Circuit branch components (circuit protection components)

[0084] 21 Circuit branching components (circuit protection components)

[0085] 22 Power connection

[0086] 22A First power connection

[0087] 22B Second power supply connection

[0088] 22a Through hole

[0089] 23 Load connection

[0090] 28 Non-contact part

[0091] 40 Frames

[0092] 41 barrel

[0093] 41a An opening (opening)

[0094] 41c Cylinder wall

[0095] 41d First opening peripheral portion (opening peripheral portion)

[0096] 42 Auxiliary cylinder

[0097] 43A First auxiliary cylinder

[0098] 43B Second auxiliary cylinder

[0099] 43a An opening (opening)

[0100] 44 Incision

[0101] 44A First incision

[0102] 44B Second incision

[0103] 51 first cover member (cover member)

[0104] 51a Cover body

[0105] 51b Outer wall

[0106] 51c Closed wall

[0107] 51d Inner wall

[0108] 51e waterproof cover wall

[0109] 60 Internal conductive parts

[0110] 60A First internal conductive part

[0111] 60B Second internal conductive part

[0112] 61 first electrical connection portion

[0113] 62 second electrical connection portion

[0114] 62a Through hole

[0115] 70 Power supply side electrical connection structure

[0116] 70A First power supply side electrical connection structure

[0117] 70B Second power supply side electrical connection structure

[0118] 71 External thread parts

[0119] 73 Internal thread parts

[0120] B External power supply

[0121] C Clip

[0122] L External load

[0123] TB Power side terminal accessories

[0124] TBa Through hole

[0125] WB Power supply side wire

[0126] WB1 First power supply side wire

[0127] WB2 Second power supply side wire

[0128] WL Load side wire

Claims

1. An electrical junction box, characterized in that: have: Electronic components; an internal conductive component, the internal conductive component electrically connecting 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 cylinder of the cylindrical portion; a cover member that fits into an opening peripheral edge portion of a peripheral edge of the opening of the cylindrical portion and closes the opening of the cylindrical portion; as well as a circuit branching component, the circuit branching component is arranged outside the tube of the tube portion and outside the frame, and is provided 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 component comprises: a power supply connection portion, which is arranged outside the tube of the tube portion and outside the frame, so that the power supply side terminal fitting at the end of the power supply side wire electrically connected to the external power supply and the second electrical connection portion of the internal conductive component are physically and electrically connected; and a load connection portion, which is electrically connected to the load side wire electrically connected to the external load, A conductive power supply side electrical connection structure is provided outside the barrel of the barrel portion and outside the frame, and the power supply side electrical connection structure can physically and electrically connect the power supply side terminal fitting at the end of the power supply side wire, the second electrical connection portion of the internal conductive component, and the power supply connection portion of the circuit branch component, and can engage the clamp at the end of the boost cable, and A disassembly and assembly working space for disassembling the clip relative to the power-side electrical connection structure is provided between the frame and the power-side electrical connection structure.

2. The electrical connection box according to claim 1, characterized in that: The power supply side electrical connection structure is a jointly fastened and fixed structure that jointly fastens and fixes the power supply side terminal fitting at the end of the power supply side electric wire, the second electrical connection part of the internal conductive part, and the power supply connection part of the circuit branching part. The power supply side electrical connection structure comprises: an external threaded part, which allows the external threaded part to be inserted into the through holes of the power supply side terminal fitting, the second electrical connection part, and the power supply connection part respectively; and an internal threaded part, which can be clamped by the clamp and screwed with the external threaded part of the external threaded part.

3. The electrical connection box according to claim 1, characterized in that: The power supply side electrical connection structure is a common fastening and fixing structure that fastens and fixes the power supply side terminal fitting at the end of the power supply side electric wire, the second electrical connection part of the internal conductive part, and the power supply connection part of the circuit branching part together, and the power supply side electrical connection structure comprises: an external threaded part, which allows the external threaded part to be inserted into the through holes of the power supply side terminal fitting, the second electrical connection part, and the power supply connection part respectively; and an internal threaded part, which is screwed with the external threaded part of the external threaded part, and The circuit branching component is provided with a non-contact portion, which is arranged at a distance from a side surface of the internal thread component when the power supply connection portion is fastened together and fixed, and can be clamped by the clip together with the internal thread component.

4. The electrical connection box according to claim 2 or 3, characterized in that: The frame has a secondary cylinder portion, the secondary cylinder portion is provided with an opening that opens in the same direction as the opening of the cylinder portion, and bulges out from the cylinder wall of the cylinder portion toward the outside of the frame from the outside of the cylinder of the cylinder portion, The cylinder wall of the cylinder has a cutout, the cutout connects the inside of the cylinder with the inside of the secondary cylinder, and allows the second electrical connection portion of the internal conductive component to protrude outside the cylinder of the cylinder to the outside of the frame, and The power source side electrical connection structure is provided in the cylinder of the sub-cylindrical portion in a manner such that the external thread portion of the external thread member and the internal thread member protrude from the opening of the sub-cylindrical portion.

5. The electrical connection box according to claim 1, 2 or 3, characterized in that: The cover component comprises: a cover body, which is arranged opposite to the opening of the barrel; an annular outer wall body, which covers the peripheral edge of the opening from the outside of the barrel; a closed wall body, which closes the gap between the cover body and the outer wall body; an annular inner wall body, which is arranged on the inner side of the outer wall body at a distance from the outer wall body and is engaged with the peripheral edge of the opening; and a waterproof cover wall body, which protrudes from the outer wall body to the following position: at this position, the power supply side electrical connection structure is covered between the waterproof cover wall body and the barrel wall of the barrel.

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