Electrical junction box

Abstract

A cylinder wall (41c) of a cylinder part (41) of a frame (40) is provided with an opposite wall body (41f) which is arranged opposite to a circuit branch part (20) outside the cylinder, and a cover part (51) is provided with a cover main body (51a) which is arranged opposite to an opening (41a) of the cylinder part; an annular outer peripheral wall body (51b) which covers the opening peripheral edge part (41d) of the cylinder part from the outside of the cylinder; a closing wall body (51c) that closes a gap between the cap main body and the outer peripheral wall body; an annular inner peripheral wall body (51d) which is disposed on the inner side of the outer peripheral wall body so as to be spaced apart from the outer peripheral wall body and which is fitted to the peripheral edge of the opening; and a waterproof cover wall body (51e) that suppresses water from splashing to the circuit branching member, the inner peripheral wall body having a waterproof wall portion (51f) that is fitted from outside the cylinder to a peripheral edge portion (41f1) on the opening side of the facing wall body, which is a part of the opening peripheral edge portion, and that covers the peripheral edge portion of the facing wall body from outside the cylinder. The waterproof cover wall body protrudes from the outer peripheral wall body to a position covering the circuit branch member between the waterproof cover wall body and the opposing wall body.

Description

Technical Field

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

[0002] In the electrical connection box, electronic components such as relays provided between an external power source and a load are accommodated 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 the 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] Problems to be solved by the invention

[0007] However, in recent years, in order to cope with the weight reduction, 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 connection 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 wire to the surrounding inside the frame. In the electrical connection box, for example, by arranging such an electric wire and the components connected to the electric wire outside the frame, the overload inside the frame caused by the electric wire can be suppressed. However, in this case, how to ensure the physical connection between the electric wire and the components connected to the electric wire and the waterproofness of the electrically connected part becomes a further problem.

[0008] Therefore, an object of the present invention is to provide an electrical junction box capable of suppressing overload in a housing and ensuring waterproofness.

[0009] Means for solving problems

[0010] The electrical connection box of 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, wherein the frame has a cylinder, the cylinder is composed of a cylinder wall with an opening at least at one end, and accommodates and holds the electronic component and the internal conductive component in its cylinder; a cover component, the cover component is fitted with an opening peripheral edge portion of the peripheral edge of the opening of the cylinder and closes the opening of the cylinder; and a circuit branching component, the circuit branching component is arranged outside the cylinder of the cylinder and outside the frame, and is arranged between the external power source and the external load, the frame sets the opening of the cylinder toward the upper side of the plumb bob, the internal conductive component has a first electrical connection portion and a second electrical connection portion which are physically and electrically connected to the electronic component in the cylinder of the cylinder, the circuit branching component has: a power connection portion, the power connection portion is electrically connected to a power supply side electric wire electrically connected to the external power source and is physically and electrically connected to the second electrical connection portion of the internal conductive component; and a load connection The load connecting portion is electrically connected to a load-side electric wire electrically connected to the external load, the cylinder wall of the cylinder has an opposing wall body arranged outside the cylinder to oppose the circuit branching component, and the cover component has: a cover body, the cover body is arranged to oppose the opening of the cylinder; an annular outer peripheral wall body, the outer peripheral wall body covers the peripheral edge of the opening from the outside of the cylinder of the cylinder; a closed wall body, the closed wall body closes the gap between the cover body and the outer peripheral wall body; an annular inner peripheral wall body, the inner peripheral wall body is arranged outside the outer peripheral wall body The inner side is arranged at a distance from the outer wall body and is embedded with the peripheral edge of the opening; and a waterproof cover wall body, the waterproof cover wall body prevents water from splashing onto the circuit branching component, the inner wall body has a waterproof wall body, the waterproof wall body is embedded in the peripheral edge of the opening side of the opposing wall body which is a part of the peripheral edge of the opening from the outside of the tube, and covers the peripheral edge of the opposing wall body from the outside of the tube, and the waterproof cover wall body protrudes from the outer wall body to a position covering the circuit branching component between the waterproof cover wall body and the opposing wall body.

[0011] Effects of the Invention

[0012] The electrical junction box of the present invention can suppress overload in the frame and ensure waterproofness by arranging the circuit branching component outside the tube of the tube part and covering the circuit branching component with the waterproof cover wall of the cover member. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0014] Figure 2 This is a plan view of the electrical connection box according to the embodiment as seen from the side of the frame.

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

[0016] Figure 4 yes Figure 2 XX line cross-sectional view.

[0017] Figure 5 It is an exploded perspective view showing the electrical junction box (without the first cover member and the second cover member) according to the embodiment.

[0018] Figure 6 It is an exploded perspective view of a frame and a first cover member in the electrical junction box according to the embodiment.

[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 electrical junction box (without the first cover member) according to the embodiment.

[0021] Fig. 9 It is a perspective view showing the first cover member.

[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 This is an enlarged view illustrating the electrical connection structure on the power supply side.

[0025] Fig.13 It is a three-dimensional diagram showing a frame.

[0026] Fig.14 yes Figure 2 A partial enlarged view of the YY line cross section.

[0027] Fig.15 It is a perspective view showing the first divided cover. DETAILED DESCRIPTION

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

[0029] [Implementation Method]

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

[0031] Figures 1 to 6 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 provided between an external power source B such as a secondary battery in the vehicle and an external load L such as an object to which power is distributed (for example, an auxiliary device to be supplied with power), so as to supply 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 between the external power supply B and the external load L. In addition, the electrical connection box 1 includes a circuit branch component 20 ( Figures 1 to 6 ). 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 electrical 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, which holds the electronic component 10; and a frame 40, which has a cylinder 41, the cylinder 41 is composed of a cylinder wall 41c with openings at both ends (openings 41a, 41b), and the cylinder wall 41c accommodates and holds the block 30 in the cylinder ( Figures 1 to 8 ). 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 of 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 of the barrel 41 and closes the other opening 41b of the barrel 41. Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figure 8 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.

[0034] In the electrical connection box 1 , the frame 40 , the first cover member 51 and the second cover member 52 constitute a housing, and wires (not shown) electrically connected to the electronic component 10 are routed in the housing 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 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.

[0036] The frame 40 is arranged so that one opening 41a of the cylinder 41 faces vertically upward. The frame 40 shown here is composed of two cylinders 41, and is mounted on the vehicle in a manner such that one opening 41a faces upward of the vehicle. 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 are assembled with each other, and the other openings 41b ( 41b ) of the two cylinders 41 are closed by assembling the first split cover 52A and the second split cover 52B. Figure 1 , Figure 2 , Figure 6 as well as Figure 8 ).

[0037] The electrical connection box 1 electrically connects the electronic component 10 to the external power source B and includes an internal conductive member 60 ( Figure 5 and Figure 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 ( Figure 5 and Figure 7 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 7 The internal conductive member 60 is shaped such that 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 extending direction. 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 ( Figure 1 and Figures 3 to 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 of the cylinder 41. For example, the electrical connection box 1 includes a first cover member 51 and a second cover member 52 as in the previous example, as long as the frame 40 includes a cylinder 41 composed of a cylinder wall 41c having openings at both ends (openings 41a and 41b). 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 having an opening 41b closed), the electrical connection box 1 includes 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.10 and Fig.11 ).

[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 member 21.

[0042] The circuit branching member (circuit protection member) 21 has a power supply connection portion 22 which is electrically connected to a power supply side wire WB electrically connected to an external power supply B and is physically and electrically connected to a second electrical connection portion 62 of an internal conductive member 60 ( Figure 5 , Fig.10 and Fig.11 ).

[0043] In addition, the circuit branching member (circuit protection component) 21 has: a load connecting portion 23, which 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 melts when an overcurrent flows ( Fig.10and Fig.11 In the circuit branching member (circuit protection component) 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 component) 21 has a connection portion 25 ( Fig.11 The connection portion 25 is connected to a fusible portion 24 for the power connection portion 22 and each external load L.

[0044] The circuit branching member (circuit protection component) 21 is a so-called bus bar, and is formed into a plate shape using, for example, a metal plate as a base material. In the circuit branching member (circuit protection component) 20, a resin portion 26 ( Figure 5 as well as Fig.10 ). 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 portion 26 ( Figure 5 and Fig.10 ).

[0045] The circuit branching component (circuit protection component) 20 is provided with a power supply connection portion 22 ( Figure 5 and Fig.10 ).

[0046] The electrical connection box 1 includes a power supply side electrical connection structure 70 ( ) for electrically connecting 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 branch member (circuit protection member) 21 to each other. Figures 3 to 5 , Figure 7 and Fig.12 A power supply side terminal fitting TB is installed at the end of the power supply side wire WB ( Figures 2 to 5 ). Therefore, the power supply side electrical connection structure 70 physically and electrically connects 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 branching member (circuit protection component) 21 to each other.

[0047] 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 7 and Fig.12The 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 respectively 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 component) 21, 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 component) 21 together ( Figure 5 and Figure 7 ).

[0048] 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).

[0049] In addition, the electrical connection box 1 includes a load-side electrical connection structure 75 ( ) for electrically connecting the load-side electric wire WL and the load connection portion 23 of the circuit branch member (circuit protection component) 21 to each other. Figure 2 , Figure 5 and Fig.10 A load-side terminal fitting TL ( Figure 2 and Fig.10 ). 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 component) 21 to each other.

[0050] The load-side electrical connection structure 75 shown here includes an external thread member 76 and an internal thread member 77 ( Fig.10 In the external thread component 76, the external thread portion of the external thread component 76 is inserted into the through hole 23a ( Fig.11 ) and the resin portion 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.10 ).

[0051] Here, in the load-side electrical connection structure 75, the external thread member 76 is arranged so that the external thread portion projects toward the side opposite to the cylinder wall 41c side of the cylinder 41. In this example, the external thread member 76 is arranged so that the thread axis of the external thread portion is aligned with the orthogonal direction with respect to the vertical direction (i.e., the vehicle up-down direction) and the external thread portion projects toward the side opposite to the cylinder wall 41c side of the cylinder 41.

[0052] Specifically, the circuit branching component (circuit protection component) 20 is arranged outside the frame 40 as follows.

[0053] 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. Figures 2 to 5 and Fig.13 ). 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 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.

[0054] In addition, the frame 40 has a sub-tube portion 43, which is provided with an opening 43a in the same direction as the opening 41a in the tube portion 41 and is formed to bulge from the tube wall 41c of the tube portion 41 to the outside of the frame 40 ( Figures 1 to 5 , Figure 8 as well as Fig.13 ). 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).

[0055] 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 at a position closer to an opening 41a of the cylinder portion 41 than the opening 43a. Therefore, the cylinder wall 41c of the cylinder portion 41 has a cutout 44 ( Figure 5 The cutout 44 is a cutout formed by cutting the tube wall 41c of the tube 41 from the end portion on the other opening 41b side toward the one opening 41a, and is cut to the one opening 41a side of the tube 41 than the one opening 43a of the secondary tube 43. Here, the cutout 44 is formed in the opposing wall 41f.

[0056] The block 30 has a protruding block portion 32, which protrudes from the cutout 44 to the outside of the cylinder 41 and is accommodated in the cylinder of the secondary cylinder portion 43 ( Figure 5 and Figure 7 ). A screw holding member 72 is assembled to the protruding block portion 32, thereby holding the power supply side electrical connection structure 70.

[0057] In the electrical connection box 1, the external threaded portion of the external threaded member 71 of the power-side electrical connection structure 70 is inserted into 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-side electrical connection structure 70 is held in the protruding block 32. In the electrical connection box 1, the block body 31 holding the internal conductive member 60 is inserted into the cylinder of the cylinder 41 from the other opening 41b, and the protruding block 32 holding the power-side electrical connection structure 70 is inserted into the cylinder of the secondary cylinder 43 from the other opening 43b together with the second electrical connection portion 62 of the internal conductive member 60. In the electrical connection box 1, the protruding block 32 and the power-side electrical connection structure 70 are accommodated in the cylinder of the secondary cylinder 43, while the second electrical connection portion 62 of the internal conductive member 60 is extended from one opening 43a of the secondary cylinder 43 together with the external threaded portion of the external threaded member 71.

[0058] In the electrical 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 further, 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 electrical 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 electrical 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.

[0059] 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 member (circuit protection member) 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 member (circuit protection member) 20 in the recessed portion 42 is accommodated in the space between the first cover member 51 and the recessed portion 42.

[0060] Specifically, the first cover component 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 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 at a distance from the outer wall body 51b and is engaged with the first opening peripheral portion 41d; and a waterproof cover wall body 51e, which prevents water from splashing onto the circuit branch component (circuit protection component) 20.

[0061] In the first cover member 51, a gap between the peripheral edge of the cover body 51a and the peripheral edge of an opening on the cover body 51a side of the peripheral wall 51b is closed by the closed wall 51c. Therefore, the first cover member 51 forms an internal space opened on the side of the peripheral wall 51b opposite to the cover body 51a by the cover body 51a, the peripheral wall 51b and the closed wall 51c.

[0062] The outer peripheral wall 51b is disposed opposite to the opposing wall 41f at a distance therefrom by at least the space for the circuit branch component (circuit protection component) 20. Figure 4). Therefore, the first cover member 51 can cover the circuit branching member (circuit protection member) 20 from one opening 41a side outside the cylinder 41 by using the cover body 51a, the outer peripheral wall 51b and the closed wall 51c. Therefore, the first cover member 51 can prevent water from splashing onto the circuit branching member (circuit protection member) 20 from the vertical upper side (above the vehicle). Here, the one opening 43a of the sub-cylinder 43 and the power-side wire WB are covered together with the circuit branching member (circuit protection member) 20 from one opening 41a side outside the cylinder 41 by using the cover body 51a, the outer peripheral wall 51b and the closed wall 51c. Therefore, the first cover member 51 can cover the circuit branching member (circuit protection member) 20, the power-side terminal fitting TB, the second electrical connection portion 62 of the internal conductive member 60 and the power-side electrical connection structure 70 from one opening 41a side outside the cylinder 41. Therefore, the first cover member 51 can suppress splashing of water from vertically above (above the vehicle) toward the circuit branching component (circuit protection component) 20 , the power supply side terminal fitting TB, and the like.

[0063] The inner peripheral wall 51d is arranged in the internal space formed by the cover body 51a, the outer peripheral wall 51b and the closed wall 51c. The inner peripheral wall 51d is an annular wall extending to the cover body 51a and connected to the cover body 51a. In the first cover member 51, the cover body 51a and the inner peripheral wall 51d form an internal space opened on the side of the inner peripheral wall 51d opposite to the cover body 51a. That is, the inner peripheral wall 51d serves as a partition wall that divides the internal space formed by the cover body 51a, the outer peripheral wall 51b and the closed wall 51c into two.

[0064] The inner peripheral wall 51d has a waterproof wall portion 51f, which is fitted from the outside of the tube into the peripheral portion 41f1 on the side of one opening 41a of the opposing wall 41f as a part of the first opening peripheral portion 41d, and covers the peripheral portion 41f1 of the opposing wall 41f from the outside of the tube ( Figure 4 , Figure 6 as well as Fig. 9 ).

[0065] The waterproof cover wall 51e protrudes from the outer peripheral wall 51b to a position (i) to cover the circuit branch component (circuit protection component) 20 between the opposing wall 41f. Figure 1 and Figure 2). The waterproof cover wall 51e protrudes from the outer peripheral wall 51b toward the other opening 41b of the barrel 41 in the axial direction of the barrel 41, and is arranged opposite to the opposite wall 41f with a gap. Thus, the first cover member 51 can cover the circuit branching member (circuit protection member) 20 from one opening 41a side outside the barrel 41 through the cover body 51a, the outer peripheral wall 51b, and the closed wall 51c, and can cover the circuit branching member (circuit protection member) 20 from the opposite wall 41f side (i.e., the side of the frame 40) outside the barrel 41 through the waterproof cover wall 51e. Therefore, the first cover member 51 can suppress water from splashing onto the circuit branching member (circuit protection member) 20 from the vertical upper side (above the vehicle), and can suppress water from splashing onto the circuit branching member (circuit protection member) 20 from the front of the vehicle, the rear of the vehicle, the side of the vehicle, etc.

[0066] The waterproof cover wall 51e is formed into a shape that covers the sub-tube 43 and the power supply side wire WB together with the circuit branching component (circuit protection component) 20 ( Figure 1 and Figure 2 ). Therefore, the first cover member 51 can cover the circuit branch member (circuit protection member) 20, the power supply terminal fitting TB, the second electrical connection portion 62 of the internal conductive member 60, and the power supply side electrical connection structure 70 from one opening 41a side outside the cylinder 41 by using the cover body 51a, the outer peripheral wall body 51b, and the closed wall body 51c, and can cover the circuit branch member (circuit protection member) 20, the power supply terminal fitting TB, the second electrical connection portion 62 of the internal conductive member 60, and the power supply side electrical connection structure 70 from the opposite wall body 41f side (the side side of the frame 40) outside the cylinder 41 by using the waterproof cover wall body 51e. Therefore, the first cover member 51 can prevent water from splashing onto the circuit branch member (circuit protection member) 20, the power supply terminal fitting TB, etc. from the vertical upper side (above the vehicle), and can prevent water from splashing onto the circuit branch member (circuit protection member) 20, the power supply side terminal fitting TB, etc. from the front of the vehicle, the rear of the vehicle, the side of the vehicle, etc.

[0067] In addition, the first cover member 51 covers the entire circuit branch member (circuit protection member) 20 from the opposing wall 41f side (the side of the frame 40) outside the cylinder 41 by means of the waterproof cover wall 51e. That is, the waterproof cover wall 51e covers the circuit branch member (circuit protection member) 20 from the end on the side of one opening 41a of the cylinder 41 to the end on the side of the other opening 41b. Therefore, the waterproof cover wall 51e makes it difficult for water splashing from the vertically downward (under the vehicle) to reach the end on the side of the other opening 41b of the circuit branch member (circuit protection member) 20, and can prevent water from reaching the power supply side electrical connection structure 70 and the load side electrical connection structure 75.

[0068] In this way, the first cover member 51 can ensure waterproofness to the circuit branching member (circuit protection member) 20 , the power supply side electrical connection structure 70 , and the like outside the tube of the tube portion 41 .

[0069] Here, the waterproof cover wall 51e is formed as a cantilevered flat plate with the outer peripheral wall 51b side as a fixed end and the end on the other opening 41b side protruding from the outer peripheral wall 51b as a free end. Therefore, the waterproof cover wall 51e is deformed in a direction away from the circuit branch component (circuit protection component) 20, and if the gap between the end on the other opening 41b side and the opposing wall 41f is widened, water can easily penetrate through the gap.

[0070] Therefore, the frame 40 has at least two cover deformation suppression parts 45, which are embedded in the periphery of the waterproof cover wall 51e to suppress the waterproof cover wall 51e from deforming in a direction away from the circuit branch component (circuit protection component) 20 ( Figures 1 to 6 , Figure 8 as well as Fig.14 The waterproof cover wall 51e has two side end portions 51e1 and 51e2 along the protruding direction from the outer peripheral wall 51b ( Fig.14 Here, as the cover deformation inhibiting portion 45, a first cover deformation inhibiting portion 45A and a second cover deformation inhibiting portion 45B are provided in a protruding state on the tube wall 41c of the tube portion 41, and the first cover deformation inhibiting portion 45A is locked to the outer wall surface (the wall surface on the side opposite to the circuit branching component (circuit protection component) 20) at one side end portion 51e1 of the waterproof cover wall body 51e, and the second cover deformation inhibiting portion 45B is locked to the outer wall surface (the wall surface on the side opposite to the circuit branching component (circuit protection component) 20) at the other side end portion 51e2 of the waterproof cover wall body 51e.

[0071] The first cover deformation suppression part 45A has a pair of protrusions 45a, 45a that protrude from the cylinder wall 41c outside the cylinder of the cylinder 41 and extend along the assembly direction of the first cover member 51 to the cylinder 41. The pair of protrusions 45a, 45a are configured so that the gap between them is wider than the plate thickness of the waterproof cover wall body 51e, so that one side end 51e1 of the waterproof cover wall body 51e invades the gap between them. In the first cover deformation suppression part 45A, as the first cover member 51 is assembled to the cylinder 41, one side end 51e1 of the waterproof cover wall body 51e is inserted between the pair of protrusions 45a, 45a. In the first cover deformation suppression part 45A, a protrusion 45a that is arranged opposite to the outer wall surface of one side end 51e1 of the waterproof cover wall body 51e stops the outer wall surface.

[0072] The second cover deformation suppression portion 45B is a protrusion that protrudes from the tube wall 41c outside the tube of the tube 41, and is formed as an L-shaped protrusion with an L-shaped cross-section that is orthogonal to the assembly direction of the first cover component 51 to the tube 41, and locks the outer wall surface of the other side end portion 51e2 of the waterproof cover wall body 51e.

[0073] Here, the first cover deformation suppression portion 45A is used to lock one side end 51e1 of the waterproof cover wall 51e from the outer wall surface side, and the second cover deformation suppression portion 45B is used to lock the other side end 51e2 of the waterproof cover wall 51e from the outer wall surface side, thereby suppressing the waterproof cover wall 51e from deforming in a direction away from the circuit branching component (circuit protection component) 20. Therefore, the first cover component 51 can continuously suppress water splashed from the vertically downward direction (below the vehicle) from reaching the power supply side electrical connection structure 70 and the load side electrical connection structure 75 through the waterproof cover wall 51e.

[0074] 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 2 , Figure 6 , Figure 8 and Fig.15 ).

[0075] In the electrical 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, in order to achieve weight reduction, 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. 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 an aluminum alloy, or may be wires whose at least one core wire is formed of aluminum or an aluminum alloy and the remaining core wires are formed of copper or a copper alloy.

[0076] When the core wires of the power-side wire WB and the load-side wire WL are formed of aluminum or aluminum alloy, they can be made lighter than when the core wires are formed of copper or copper alloy, but they become thicker and harder to bend as they cope with large currents. 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 inside the frame, and can also improve the accommodation of other wires in the barrel of the barrel 41.

[0077] Specifically, the electrical connection box 1 shown here includes a first internal conductive component 60A and a second internal conductive component 60B as the internal conductive component 60, and the first internal conductive component 60A and the second internal conductive component 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 .

[0078] In addition, the circuit branching member (circuit protection component) 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 component) 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.

[0079] When viewed from the circuit branching member (circuit protection component) 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 component) 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 component) 21 and the first power supply side wire WB1.

[0080] The first power connection portion 22A is electrically connected to the first power side wire WB1, and is physically and electrically connected to the second electrical connection portion 62 of the first internal conductive component 60A. The electrical connection box 1 includes a first power side electrical connection structure 70A as a power side electrical connection structure 70 (electrical connection structure) for electrically connecting the first power 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 branching member (circuit protection component) 21 to each other. Figures 2 to 5 , Figure 7 and Fig.12). 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 branching member (circuit protection component) 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 branching member (circuit protection component) 21 together. Here, the power supply side terminal fitting TB, the second electrical connection portions 62 of each of the two first internal conductive components 60A, and the first power connection portion 22A of the circuit branching member (circuit protection component) 21 are fastened and fixed together.

[0081] 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 5 , Figure 8 as well as Fig.13 ). 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 its own cylinder 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 ). 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 barrel 41 and is accommodated in the barrel of the first sub-barrel portion 43A ( Figure 5 and Figure 7 ).

[0082] In the electrical connection box 1, the first protruding block portion 32A and the first power supply side electrical connection structure 70A are accommodated in the cylinder of the first sub-cylinder portion 43A in a state where the second electrical connection portions 62 of each of the two first internal conductive components 60A are extended together with the external thread portion of the external thread component 71 from an opening 43a of the first sub-cylinder portion 43A.

[0083] The second power connection portion 22B is electrically connected to the second power supply side wire WB2, and is physically and electrically connected 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 a power supply side electrical connection structure 70 (which electrically connects 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 component) 21. Figures 2 to 5 and Figure 7 ). The second power supply side electrical connection structure 70B is formed by inserting the external thread portion of the external thread component 71 through 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 component) 21, 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 second internal conductive component 60B, and the second power supply connection portion 22B of the circuit branch member (circuit protection component) 21 together.

[0084] 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 5 , Figure 8 as well as Fig.13 ). 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 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 ).

[0085] In the electrical connection box 1, the second protruding block portion 32B and the second power supply side electrical connection structure 70B are accommodated in the cylinder of the second sub-cylinder portion 43B in a state where the second electrical connection portion 62 of the second internal conductive component 60B and the external thread portion of the external thread component 71 are extended from one opening 43a of the second sub-cylinder portion 43B.

[0086] In the electrical connection box 1, the external threaded portion of the external threaded member 71 of the first power supply side electrical connection structure 70A is inserted into the through hole 22a of the first power supply side electrical connection part 22A to assemble the first power supply side electrical connection part 22A to the first power supply side electrical connection structure 70A, and the external threaded portion of the external threaded member 71 of the second power supply side electrical connection structure 70B is inserted into the through hole 22a of the second power supply side electrical connection part 22B to assemble the second power supply side electrical connection part 22B to the second power supply side electrical connection structure 70B. In addition, in the electrical connection box 1, the external threaded portion of the external threaded member 71 of the first power supply side electrical connection structure 70A is inserted into the through hole TBa of the power supply side terminal fitting TB of the first power supply side wire WB1 to assemble the power supply side terminal fitting TB to the first power supply side electrical connection structure 70A, and the external threaded portion of the external threaded member 71 of the second power supply side electrical connection structure 70B is inserted into the through hole TBa of the power supply side terminal fitting TB of the second power supply side wire WB2 to assemble the power supply side terminal fitting TB to the second power supply side electrical connection structure 70B. In the electrical connection box 1, the internal threaded parts 73 are screwed into the external threaded parts of the external threaded parts 71, respectively, to fasten and fix 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 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 together. In the electrical 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.

[0087] 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 housed in the first cover component 51.

[0088] The first cover member 51 covers one opening 43a of each of the first sub-tube 43A and the second sub-tube 43B, the first power supply side wire WB1 and the second power supply side wire WB2, and the circuit branching member (circuit protection member) 20 from one opening 41a side outside the tube of the tube 41 by means of the cover body 51a, the outer peripheral wall 51b, and the closing wall 51c. Therefore, the first cover member 51 can cover the circuit branching member (circuit protection member) 20, 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 side electrical connection structure 70A, and the second power supply side electrical connection structure 70B from one opening 41a side outside the tube of the tube 41. Therefore, the first cover member 51 can suppress water from splashing from the vertical upper side (above the vehicle) onto the circuit branching member (circuit protection member) 20, the power supply side terminal fittings TB, and the like.

[0089] Furthermore, the first cover member 51 covers the circuit branch member (circuit protection member) 20, the two power supply side terminal fittings TB, the second electrical connection portions 62 of the two first internal conductive members 60A and the second internal conductive member 60B, the first power supply side electrical connection structure 70A, and the second power supply side electrical connection structure 70B from the outside of the cylinder 41 by means of the waterproof cover wall 51e. Therefore, the first cover member 51 can prevent water from splashing onto the circuit branch member (circuit protection member) 20, the power supply side terminal fittings TB, etc. from the vertically upward direction (above the vehicle), and can prevent water from splashing onto the circuit branch member (circuit protection member) 20, the power supply side terminal fittings TB, etc. from the front of the vehicle, the rear of the vehicle, the side of the vehicle, etc.

[0090] In addition, the first cover member 51 can prevent water splashing from the vertically downward direction from reaching the first power supply side electrical connection structure 70A, the second power supply side electrical connection structure 70B, and the load side electrical connection structure 75 through the waterproof cover wall body 51e. In addition, the first cover member 51 can continuously maintain its suppression function through the cover deformation suppression part 45 (the first cover deformation suppression part 45A and the second cover deformation suppression part 45B).

[0091] Thus, the first cover member 51 can ensure waterproofness of the circuit branching member (circuit protection member) 20 , the first power source side electrical connection structure 70A, the second power source side electrical connection structure 70B, etc., outside the tube of the tube portion 41 .

[0092] 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 8 and Fig.15 ). The first closing portion 53A and the second closing portion 53B may be a single 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 second opening peripheral portion 41e of the barrel portion 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.

[0093] As described above, the electrical connection box 1 of this embodiment arranges the circuit branching component (circuit protection component) 20 outside the barrel of the barrel 41 and 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 being overloaded toward the periphery in the frame. In particular, in the electrical 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 that the overload of the power side wire WB and the like in the frame can be suppressed. For example, in the electrical connection box 1, by suppressing the overload of the power side wire WB and the like in the frame toward the second cover member 52, the deformation of the second cover member 52 can be suppressed. In addition, by laying the power side wire WB and the like, which are difficult to bend, outside the frame 40, the electrical connection box 1 can improve the accommodation of other wires in the barrel of the barrel 41. In addition, the electrical connection box 1 can suppress the temperature rise in the frame by arranging 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 will not be retained in the frame. Moreover, the electrical connection box 1 can achieve these effects and can ensure the waterproofness of the circuit branching component (circuit protection component) 20, the power supply side electrical connection structure 70 (the first power supply side electrical connection structure 70A, the second power supply side electrical connection structure 70B), etc. through the first cover component 51.

[0094] Description of Reference Numerals

[0095] 1 Electrical connection box

[0096] 10 Electronic components

[0097] 20 Circuit branch components (circuit protection components)

[0098] 21 Circuit branch components (circuit protection components)

[0099] 22 Power connection

[0100] 22A First power connection

[0101] 22B Second power supply connection

[0102] 23 Load connection

[0103] 40 Frames

[0104] 41 barrel

[0105] 41a an opening (opening)

[0106] 41c cylinder wall

[0107] 41d: first opening peripheral portion (opening peripheral portion)

[0108] 41f Opposing wall

[0109] 41f1 peripheral part

[0110] 43 Auxiliary cylinder

[0111] 43A First auxiliary cylinder

[0112] 43B Second auxiliary cylinder

[0113] 43a an opening (opening)

[0114] 44 Incision

[0115] 44A First incision

[0116] 44B Second incision

[0117] 45 Cover deformation suppression unit

[0118] 45A First cover deformation suppression portion

[0119] 45B Second cover deformation suppression portion

[0120] 51 first cover member (cover member)

[0121] 51a Cover body

[0122] 51b Outer wall

[0123] 51c Closed wall

[0124] 51d Inner wall

[0125] 51e waterproof cover wall

[0126] 51f waterproof wall

[0127] 60 Internal conductive parts

[0128] 60A First internal conductive part

[0129] 60B Second internal conductive part

[0130] 61 first electrical connection portion

[0131] 62 second electrical connection portion

[0132] 70 Power supply side electrical connection structure

[0133] 70A First power supply side electrical connection structure

[0134] 70B Second power supply side electrical connection structure

[0135] B External power supply

[0136] L External load

[0137] TB Power side terminal accessories

[0138] TL Load Side Terminal Accessories

[0139] WB Power supply side wire

[0140] WB1 First power supply side wire

[0141] WB2 Second power supply side wire

[0142] WL Load side wire

Claims

1. An electrical connection 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 least at one end, and accommodating and holding the electronic component and the internal conductive component in 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 is arranged outside the frame outside the cylinder of the cylinder and is disposed between the external power source and the external load. The frame sets the opening of the cylinder toward the upper side of the plumb bob. The internal conductive component has a first electrical connection portion and a second electrical connection portion that are physically and electrically connected to the electronic component within the barrel of the barrel portion. The circuit branching component comprises: a power supply connection portion electrically connected to a power supply side wire electrically connected to the external power supply and physically and electrically connected to the second electrical connection portion of the internal conductive component; and a load connection portion electrically connected to a load side 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 cover component comprises: a cover body, the cover body and the opening of the cylinder are arranged opposite to each other; an annular outer wall body, the outer wall body covers the peripheral edge of the opening from the outside of the cylinder; a closed wall body, the closed wall body closes the gap between the cover body and the outer wall body; an annular inner wall body, the inner wall body is arranged on the inner side of the outer wall body with a gap therebetween and is engaged with the peripheral edge of the opening; and a waterproof cover wall body, the waterproof cover wall body prevents water from splashing onto the circuit branch component, The inner peripheral wall body has a waterproof wall body, which is fitted into the peripheral edge portion of the opening side of the opposing wall body as a part of the opening peripheral edge portion from the outside of the tube and covers the peripheral edge portion of the opposing wall body from the outside of the tube, and The waterproof cover wall body protrudes from the outer peripheral wall body to a position where the circuit branch component between the waterproof cover wall body and the opposing wall body is covered.

2. The electrical connection box according to claim 1, characterized in that: The frame has at least two cover deformation suppressing portions, and the cover deformation suppressing portions are embedded in the peripheral edge of the waterproof cover wall body to suppress deformation of the waterproof cover wall body in a direction away from the circuit branching component.

3. The electrical connection box according to claim 1, characterized in that: The second electrical connection portion is arranged outside the tube of the tube portion and outside the frame. The frame has a secondary tube portion, the secondary tube portion is provided with an opening that opens in the same direction as the opening of the tube portion, and is shaped to bulge out of the frame from the opposing wall outside the tube of the tube portion. A power supply side electrical connection structure is provided in the cylinder of the secondary cylinder portion, and the power supply side electrical connection structure electrically connects 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 to each other. The opposing wall has a cutout that connects the inside of the barrel of the barrel portion with the inside of the sub-barrel portion, and allows the second electrical connection portion of the internal conductive component to protrude outside the barrel of the barrel portion to the outside of the frame, and The waterproof cover wall is formed in a shape that covers the sub-cylindrical portion and the power supply side electric wires together with the circuit branching component.

4. The electrical connection box according to claim 1, 2 or 3, characterized in that: The circuit branching member is configured such that the power supply connection portion is disposed at a position closer to the first opening peripheral portion than the load connection portion in the cylindrical axial direction of the cylindrical portion.

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