Electrical junction box

Abstract

To provide an electrical connection box that is less prone to becoming bulky. [Solution] The electrical junction box comprises a first busbar having a first bent portion through which the main circuit current flows in a first direction, and a first extended portion extending in a second direction from one end of the first bent portion on the first direction side; a relay having a coil, an output terminal which is the output terminal of the coil current of the coil, an input terminal which is the input terminal of the coil current, and contact portions aligned in a second direction with respect to the central axis of the coil; an output wire extending to the output terminal and an input wire extending to the input terminal, wherein the coil is aligned in a third direction with respect to the first bent portion, the input terminal is aligned in a third direction with respect to the output terminal, the output wire extends in a second direction from the output terminal, and the input wire comprises a first line and a bypass line continuous with one end of the first line on the second direction side, wherein the first line is aligned in a fourth direction with respect to the output wire and extends along the output wire, and the bypass line extends to the input terminal in a way that bypasses the output terminal.

Description

[Technical Field]

[0001] This disclosure relates to an electrical junction box. [Background technology]

[0002] A well-known electronic component incorporated into electrical junction boxes is a contact device (hereinafter also referred to as a "relay").

[0003] For example, Patent Document 1 discloses a contact device comprising: a fixed terminal that holds a fixed contact; a movable contact that holds a movable contact and moves between a closed position in which the movable contact contacts the fixed contact and an open position in which the movable contact moves away from the fixed contact; and a busbar electrically connected to the fixed contact, wherein the busbar has a circuit piece extending in line with the direction of the current flowing through the movable contact, and the circuit piece has a first width portion having a predetermined width in a direction perpendicular to the direction of the current flowing through the circuit piece, and a second width portion that is narrower than the first width portion. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2021-022548 [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] The contact device disclosed in Patent Document 1 can stabilize the connection state between the movable contact and the fixed contact when an abnormal current flows. However, when the above-mentioned contact device is incorporated into an electrical junction box, the complex shape of the busbars tends to increase the size of the electrical junction box.

[0006] One embodiment aims to provide an electrical connection box that does not become excessively large when a contact device is incorporated into it. [Means for solving the problem]

[0007] An electrical connection box according to an embodiment includes a first bus bar including a first bent portion through which a main circuit current flows in a first direction, and a first extending portion extending along a second direction intersecting the first direction from one end of the first bent portion on the first direction side; a coil; an output terminal that is a terminal on the output side of the coil current of the coil; an input terminal that is a terminal on the input side of the coil current; and a relay including a contact portion arranged in the second direction with respect to the central axis of the coil. The electrical connection box further includes an output wiring extending to the output terminal and an input wiring extending to the input terminal. The coil is arranged in a third direction intersecting the first direction and the second direction with respect to the first bent portion. The input terminal is arranged in the third direction with respect to the output terminal. The output wiring extends from the output terminal along the second direction. The input wiring includes a first line and a bypass line continuous with one end of the first line on the second direction side. The first line is arranged in a fourth direction opposite to the third direction with respect to the output wiring and extends along the output wiring. The bypass line extends to the input terminal so as to bypass the output terminal.

Advantages of the Invention

[0008] According to one embodiment, when incorporating the contact device, the body is not likely to become enlarged.

Brief Description of the Drawings

[0009] [Figure 1] Perspective view showing the electrical connection box of the embodiment. [Figure 2] Perspective view showing the base member of the embodiment. [Figure 3] Perspective view showing the electrical connection box with the cover member removed from the state of FIG. 1. [Figure 4] Perspective view showing the cover member of the embodiment. [Figure 5] Perspective view I showing the relay of the embodiment. [Figure 6] Perspective view II showing the relay of the embodiment. [Figure 7] Side view showing the relay of the embodiment. [Figure 8] A front view showing the relay of the embodiment. [Figure 9] Figure I shows the installation of the busbars in the embodiment. [Figure 10] Figure I shows the arrangement of input wiring and busbars in the embodiment. [Figure 11] Figure II shows the arrangement of input wiring and busbars in the embodiment. [Figure 12] Figure II shows the installation of the busbars in the embodiment. [Figure 13] Figure I shows the magnetic field generated around the relay of the embodiment. [Figure 14] Figure II shows the magnetic field generated around the relay of the embodiment. [Figure 15] A diagram showing the magnetic field generated around the relay in the comparative example. [Figure 16] A diagram showing the internal state of the relay in the comparative example. [Modes for carrying out the invention]

[0010] The embodiments of this disclosure will be described below with reference to the drawings. The drawings and specific configurations used in each embodiment should not be used to interpret the disclosure. In all drawings, identical or corresponding components are denoted by the same reference numerals, and common descriptions are omitted.

[0011] In this disclosure, the +X direction, -X direction, +Y direction, -Y direction, +Z direction, and -Z direction are defined as follows: The -Z direction is the direction in which the main circuit current flows through the first bent portion 32 of the first busbar 3A. The +Z direction is the opposite direction to the -Z direction. Hereinafter, when the +Z direction and the -Z direction are not distinguished, they will simply be referred to as the "Z direction". The -Y direction is the direction in which the first extension portion 33 extends from one end of the first bent portion 32 in the first busbar 3A. The +Y direction is the opposite direction to the -Y direction. Hereinafter, when the +Y direction and the -Y direction are not distinguished, they will simply be referred to as the "Y direction". The +X direction and the -X direction are directions that intersect (e.g., are orthogonal to) the Y direction and the Z direction. The +X direction is the direction from the output terminal 432 of the relay 4 toward the input terminal 431 of the relay 4. The -X direction is the opposite direction to the +X direction. In the following, when the +X direction and the -X direction are not distinguished, they will simply be referred to as the "X direction". The -Z direction is an example of the "first direction". The -Y direction is an example of the "second direction". The +X direction is an example of the "third direction". The -X direction is an example of the "fourth direction". The +Z direction is an example of the "fifth direction". The +Y direction is an example of the "sixth direction".

[0012] In the following, the X and Y directions may be referred to as the "horizontal direction" if they are not distinguished. In the following, the Z direction may be referred to as the "vertical direction." However, these expressions are for the sake of explanation and do not limit the installation orientation of the electrical junction box 100.

[0013] The above expression is for explanatory purposes only and does not limit the routing of the input wiring 5 extending from the input terminal 431 of relay 4.

[0014] <First Embodiment> The following describes an electrical junction box 100 according to one embodiment, with reference to the figures. As shown in Figure 1, the electrical junction box 100 comprises a base member 1, a cover member 2, at least one bus bar 3 (first bus bar 3A, second bus bar 3B), a relay 4, input wiring 5, and output wiring 6. For example, the electrical junction box 100 may be mounted on a mobility unit such as an electric vehicle.

[0015] (Configuration of base components) As shown in Figures 2 and 3, the base member 1 is a holding member that holds at least one or more busbars 3, input wiring 5, and output wiring 6. The base member 1 is made of, for example, synthetic resin and has insulating properties. When multiple busbars 3 are held by the base member 1, the base member 1 electrically insulates the multiple busbars 3 from each other. When one of the input wiring 5 and output wiring 6 is held by the base member 1, the base member 1 electrically insulates the input wiring 5 and output wiring 6 from each other. The base member 1 has, for example, a flat portion 10.

[0016] The flat portion 10 is a plate-shaped part within the base member 1. The flat portion 10 is plate-shaped and oriented horizontally. The flat portion 10 forms the main part of the base member 1. The flat portion 10 forms the base (insulating base) of the base member 1.

[0017] The flat portion 10 has a first surface 10a and a second surface 10b. The first surface 10a is a surface facing the +Z direction. The first surface 10a is a plane that aligns with the horizontal direction. The first surface 10a faces the relay 4. In this embodiment, the flat portion 10 on the first surface 10a has multiple cutouts (see Figure 2). When the cutouts are made, ribs may be provided on the flat portion 10. The second surface 10b is located on the opposite side from the first surface 10a. The second surface 10b is a surface facing the -Z direction. The second surface 10b is a plane that aligns with the horizontal direction. The second surface 10b is the mounting surface when mounted on the mobility unit. The thickness direction (plate thickness direction) of the flat portion 10 is the Z direction.

[0018] The planar portion 10 has, for example, one or more (e.g., multiple) first housing portions 11 that hold a portion of at least one or more busbars 3. For example, in this embodiment, the first housing portion 11 holds the first extension portion 33 of the first busbar 3A.

[0019] The planar section 10 has two second housing sections 12, for example, which hold a portion of the relay's input wiring 5 and output wiring 6. Each housing section (first housing section 11, second housing section 12) is formed apart from each other in the X or Y direction.

[0020] Each housing section (first housing section 11, second housing section 12) is a recess provided on the first surface 10a of the planar section 10 and recessed in the first direction (-Z direction). In this disclosure, "the housing section is recessed in the first direction (-Z direction)" may also include cases where a portion of the total length of each housing section (first housing section 11, second housing section 12) is recessed in the -Z direction.

[0021] Each housing section (first housing section 11, second housing section 12) has an external shape that corresponds to the shape of the bus bar 3, input wiring 5, and output wiring 6 to be housed when viewed from the Z direction. In this embodiment, the planar section 10 includes a plurality of housing sections, for example, one first housing section 11 (first housing section 11A) and two second housing sections 12 (second housing sections 12A, 12B). The first housing section 11A is provided in correspondence with the first bus bar 3A, which will be described later, and houses at least a part of the first bus bar 3A. For example, in this embodiment, the first housing section 11A is configured to route the first extension section 33 along the planar section 10. The second housing section 12A is provided in correspondence with the input wiring 5, which will be described later, and houses the input wiring 5. The second housing section 12B is provided in correspondence with the output wiring 6, which will be described later, and houses the output wiring 6.

[0022] (Composition of the cover section) As shown in Figures 1, 3, and 4, the cover member 2 is a member that protects the busbar 3 from the outside. In this embodiment, the cover member 2 has an opening on a part of the surface facing the +Z direction, but is not limited to this. In addition, as in this embodiment, the cover member 2 may have a mounting portion 21 for fixing the relay 4 (see Figure 4). For example, the mounting portion 21 is a through hole provided in the cover member 2. The relay 4 is integrated with the cover member 2 by the mounting portion 21. The mounting portion 21 corresponds to the mounting hole 44h of the relay 4. The cover member 2 can be fitted onto the base member 1. By fitting, the cover member 2 protects the busbar 3 and holds the relay 4 (see Figure 1). The cover member 2, like the base member 1, is made of, for example, synthetic resin and has insulating properties.

[0023] The cover member 2 may have a projection corresponding to the mounting hole 44h of the relay 4 instead of a through hole in the mounting portion 21. If the mounting portion 21 is a projection, the relay 4 can be fixed to the cover member 2 by heat crimping.

[0024] As shown again in Figure 3, there is a gap between the flat portion 10 and the mounting hole 44h of the relay 4. For example, the flat portion 10 may have a projection or through hole corresponding to the mounting hole 44h of the relay 4. The projection or through hole integrates the relay 4 with the base member 1. If the flat portion 10 has the projection, the relay 4 can be fixed to the base member 1 by heat crimping. Fixing the relay 4 by heat crimping reduces the number of parts involved in fixing the relay 4. If the flat portion 10 has the through hole, the relay 4 can be fixed to the base member 1 by mechanical joining with fastening elements such as screws or bolts.

[0025] (Bus bar configuration) As shown in Figures 5 and 6, the busbar 3 is a wiring member (electrical connection member) that electrically connects multiple electrical components. The busbar 3 is made of metal (for example, copper or a copper alloy) and is conductive. In this embodiment, the busbar 3 is connected to a relay 4, and the relay 4 controls the current flowing through the busbar 3. For example, in this embodiment, the electrical connection box 100 has at least one or more busbars 3, specifically two busbars 3 (first busbar 3A and second busbar 3B). The first busbar 3A and the second busbar 3B are arranged horizontally with a gap between them. At least a portion of the first busbar 3A (for example, the first extension portion 33) is housed in the first housing portion 11A of the base member 1. Due to housing in the first housing portion 11A, the first extension portion 33 is routed along the planar portion 10.

[0026] (First bus bar) The first busbar 3A is electrically connected to the first fixed contact 421 of relay 4. The first busbar 3A has, for example, a connecting portion 31, a first bent portion 32, a first extended portion 33, and a bypass portion 34. In this embodiment, each of the first bent portion 32, the first extended portion 33, and the bypass portion 34 is plate-shaped. That is, each of the first bent portion 32, the first extended portion 33, and the bypass portion 34 has a flat rectangular cross-sectional shape.

[0027] (Connection part) The connection portion 31 is the part that electrically connects the relay 4, which is electrically connected to the first busbar 3A, to other components or equipment. The connection portion 31 is provided at one end of the first busbar 3A. The connection portion 31 has an insertion hole 31h through which a fastening member 71 (e.g., a screw or bolt) passes (see Figure 4). For example, in this embodiment, the connection portion 31 is included in a part of the first bent portion 32.

[0028] (first bending part) The main circuit current flows through the first bent section 32 in the first direction (-Z direction). The first bent section 32 is erected in the fifth direction (+Z direction) relative to the first extended section 33.

[0029] (First extension part) The first extension 33 is provided between the first bending section 32 and the detour section 34. The first extension 33 extends from one end of the first bending section 32 on the first direction (-Z direction) side along the second direction (-Y direction). The first extension 33 is aligned with respect to the output wiring 6, which will be described later, in the fourth direction (-X direction).

[0030] (Detour section) The detour section 34 is continuous with one end of the first extension section 33 on the second direction (-Y direction). The detour section 34 extends toward the first fixed contact 421, bypassing the second fixed contact 422 (see Figure 6). In this case, the distance between the end of the first extension section 33 connected to the detour section 34 and the first fixed contact 421 is longer than the distance between the end of the first extension section 33 connected to the detour section 34 and the second fixed contact 422. At least a portion of the detour section 34 extends in the fifth direction (+Z direction).

[0031] An insertion hole 34h is formed at one end of the bypass section 34 on the fifth direction side, allowing connection to the relay 4 to be connected. The first busbar 3A is electrically connected to the relay 4 by passing a fastening member 72 (for example, a screw or bolt) through the insertion hole 34h in the bypass section 34. A portion of the bypass section 34 where the insertion hole 34h is provided extends in the fifth direction (+Z direction) for connection to the relay 4.

[0032] (Second bus bar) The second busbar 3B is electrically connected to the second fixed contact 422 of relay 4. The second busbar 3B has, for example, a second bent portion 36, a second extended portion 37, and an extension portion 38. In this embodiment, each of the second bent portion 36 and the second extended portion 37 is plate-shaped. That is, each of the second bent portion 36 and the second extended portion 37 has a flat rectangular cross-sectional shape. The extension portion 38 is plate-shaped and runs vertically. The extension portion 38 extends to connect the second bent portion 36 and the second extended portion 37. The extension portion 38 is a portion of the busbar 3 that is extended for the purpose of increasing the heat dissipation area and / or increasing the heat capacity for heat storage (heat absorption). The extension portion 38 is a portion that is not used for electrical connections.

[0033] (Second bending part) The main circuit current flows from the second fixed contact 422 in the first direction (-Z direction) through the second bent portion 36.

[0034] Furthermore, a through hole 34h is formed at one end of the second bent portion 36 on the fifth direction side, which is connected to the relay 4. The second busbar 3B is electrically connected to the relay 4 by passing a fastening member 72 (for example, a screw or bolt) through the through hole 34h in the second bent portion 36.

[0035] (Second stretching section) The second extension portion 37 extends from one end of the second bent portion 36 on the first direction (-Z direction) side toward a predetermined direction. For example, in this embodiment, the second extension portion 37 extends from one end of the second bent portion 36 on the first direction side toward a fourth direction (-X direction).

[0036] As shown in Figure 7, the current I flowing through the first busbar 3A B1 The current flows in the following order: first bent section 32 - first extended section 33 - bypass section 34 - first fixed contact 421 (relay 4). Current I flows through the second busbar 3B. B2 The current flows in the following order: second fixed contact 422 (relay 4) - second bending section 36 - second extension section 37 - bypass section 34.

[0037] (Relay configuration) Relay 4 (hereinafter also referred to as "mechanical relay") opens and closes mechanical contacts by electromagnetic action. By opening and closing the contacts, the current flowing between the first busbar 3A connected to the first fixed contact 421 and the second busbar 3B connected to the second fixed contact 422 is controlled. Examples of mechanical relays include electromagnetic relays (also referred to as "electromagnetic relays"), contactors (also referred to as "electromagnetic contactors"), and magnetic switches (also referred to as "electromagnetic switches"). Busbars 3 are attached to the main contacts of relay 4 shown in Figure 8. The main contacts of relay 4 are the first fixed contact 421 and the second fixed contact 422, which are included in the contact section 42 described later. For example, in this embodiment, the first busbar 3A and the second busbar 3B are attached to the main contacts of relay 4 (see Figure 5). If relay 4 is a contactor or a magnetic switch, relay 4 has auxiliary contacts in addition to the main contacts. Busbars 3 other than the first busbar 3A and the second busbar 3B are attached to the auxiliary contacts. Therefore, as described above, the electrical junction box 100 may have multiple busbars 3.

[0038] For example, relay 4 has a case 41, a contact section 42, an operating circuit 43, and a plurality of mounting sections 44. The main circuit of relay 4 is formed by the first busbar 3A, the second busbar 3B, and the contact section 42.

[0039] (case) The case 41 is an outer casing that forms most of the external shape of the relay 4. The case 41 is made of, for example, synthetic resin and has insulating properties. The case 41 houses the contact portion 42 and the operating circuit 43.

[0040] In this embodiment, the case 41 has insulating ribs 41a that protrude horizontally (e.g., in the -Y direction) and extend in the Z direction. The insulating ribs 41a are, for example, plate-shaped along the horizontal (e.g., in the X direction) and Z directions. The insulating ribs 41a extend, for example, along the entire length of the case 41 in the Z direction. The insulating ribs 41a are positioned between the first fixed contact 421 and the second fixed contact 422. The insulating ribs 41a electrically insulate the first fixed contact 421 and the second fixed contact 422. In this embodiment, a portion of the insulating ribs 41a is positioned between the two busbars 3 (first busbar 3A, second busbar 3B) connected to the relay 4. The insulating ribs 41a electrically insulate the two busbars 3 connected to the relay 4.

[0041] (Contact point 42) The contact section 42 is responsible for controlling the current of the main circuit. The opening and closing of the contacts is performed by the operation of the movable contact 423 included in the contact section 42. By opening and closing the contacts, the contact section 42 switches between a conductive state and a non-conductive state of the main circuit. The contact section 42 includes a first fixed contact 421, a second fixed contact 422, and a movable contact 423. The contact section 42 is arranged in the second direction (-Y direction) with respect to the central axis of the coil 433.

[0042] (Fixed contact) The first fixed contact 421 and the second fixed contact 422 open and close the contacts of the main circuit by contacting the movable contact 423. The first fixed contact 421 and the second fixed contact 422 face the movable contact 423. The first fixed contact 421 is also aligned with the second fixed contact 422 in the third direction (+X direction). The first fixed contact 421 and the second fixed contact 422 are partially exposed to the outside of the case 41 and have mounting holes 42h into which fastening members 72 (e.g., screws or bolts) are attached. The inner circumferential surface of the mounting hole 42h has screw grooves. The first busbar 3A is connected to the first fixed contact 421 via this mounting hole 42h, and the second busbar 3B is connected to the second fixed contact 422 via this mounting hole 42h.

[0043] Note that one of the first fixed contact 421 and the second fixed contact 422 is the positive terminal, and the other of the first fixed contact 421 and the second fixed contact 422 is the negative terminal. For example, in this embodiment, the first fixed contact 421 to which the first busbar 3A is connected is the "positive terminal," and the second fixed contact 422 to which the second busbar 3B is connected is the "negative terminal."

[0044] (movable contact) The movable contact 423 electrically connects the first fixed contact 421 and the second fixed contact 422 by moving along the second direction (-Y direction). For example, the movable contact 423 is connected to a movable element via a transmission unit, and the transmission unit moves the movable contact 423 in accordance with the movement of the movable element. The movement of the movable contact 423 is performed as follows: First, the movable element is attracted by the magnetic field generated by the coil 433 when the coil 433 (described later) is energized. Next, the transmission unit moves the movable contact 423 in accordance with the attraction of the movable element. As the movable contact 423 moves, it comes into contact with the first fixed contact 421 and the second fixed contact 422, thereby opening and closing the contacts of the main circuit (first fixed contact 421, second fixed contact 422). In this disclosure, the "open position" is the position of the movable contact 423 when the main circuit is open. In this disclosure, the "closed position" is the position of the movable contact 423 when the main circuit is closed. Please note that the above is merely an example, and the contact point 42 in the main circuit can be either normally open or normally closed.

[0045] (operation circuit) The control circuit 43 is a circuit that moves the movable contact 423, which is responsible for controlling the current of the main circuit. The control circuit 43 includes an input terminal 431, an output terminal 432, and a coil 433. As shown again in Figure 8, the input terminal 431 is the input terminal for the coil current and extends in the first direction (-Z direction). The output terminal 432 is the output terminal for the coil current and extends in the first direction (-Z direction). The input terminal 431 is aligned with the output terminal 432 in the third direction (+X direction). The coil 433 is configured to generate a counterclockwise magnetic field when viewed from the first direction (-Z direction) relative to the first bent portion 32. In this case, as shown in Figure 9, the coil 433 is aligned with the first bent portion 32 in the third direction (+X direction). More specifically, the coils 433 are arranged in a tilt direction D that is tilted in the third direction (+X direction) relative to the second direction (-Y direction) with respect to the first bent portion 32.

[0046] (Mounting part) As shown again in Figures 5 and 6, the mounting portion 44 is a part for fixing the relay 4 when a projection or through hole corresponding to the mounting hole 44h exists in the base member 1 or cover member 2. For example, the mounting portion 44 has a mounting hole 44h into which a fastening member 73 (e.g., a screw or bolt) is attached. The mounting hole 44h opens in the Z direction. The mounting hole 44h is an insertion hole through which the fastening member 73 or projection passes.

[0047] (Input wiring configuration) As shown in Figures 9 to 11, the input wiring 5 extends to the input terminal 431 and is routed along the planar section 10. The input wiring 5 is aligned with the input terminal 431 in the first direction (-Z direction) and forms a vertical current path. The input wiring 5 comprises a first line 51 and a bypass line 52. The first line 51 is aligned with the output wiring 6 in the fourth direction (-X direction) and extends along the output wiring 6.

[0048] The bypass line 52 is continuous with one end on the second direction (-Y direction) side of the first line 51. The bypass line 52 extends toward the input terminal 431 so as to bypass the output terminal 432. At that time, the distance between the end of the first line 51 connected to the bypass line 52 and the input terminal 431 is longer than the distance between the end of the first line 51 connected to the bypass line 52 and the output terminal 432.

[0049] (Configuration of output wiring) The output wiring 6 extends along the second direction toward the output terminal 432 and is routed along the flat portion 10. The output wiring 6 is routed from the fourth direction (-Y direction) side toward the second direction (+Y direction) side. The output wiring 6 is arranged side by side with respect to the output terminal 432 in the first direction (-Z direction) and forms a vertical current path.

[0050] (Regarding the magnetic field generated when the main circuit is conducting) As shown in FIGS. 12 to 14, the current I flowing through the first bus bar 3A B1 causes a clockwise magnetic field B to be generated in the first bent portion 32 as viewed from the first direction (-Z direction). B1 At that time, the coil 433 generates a counterclockwise magnetic field B with respect to the first bent portion 3 as viewed from the first direction (-Z direction). C It can be confirmed that the magnetic field B B1 and the magnetic field B C do not interfere with each other.

[0051] Also, the current I flowing through the first bus bar 3A B1 causes a counterclockwise magnetic field B to be generated in a part of the bypass circuit portion 34 as viewed from the first direction (-Z direction). B12 It can be confirmed that the magnetic field B B12 and the magnetic field B generated by the coil 433 C2 do not interfere with each other.

[0052] Also, the current I flowing through the second bus bar 3B B2 causes a clockwise magnetic field B to be generated in the second bent portion 36 as viewed from the first direction (-Z direction). B2 It is generating. The magnetic field B B2And, magnetic field B C It can be confirmed that these two do not interfere with each other.

[0053] (Mechanism of Action and Effects) As a comparative example, as shown in Figure 15, the current I flowing through the first busbar 3A B1 As a result, a counterclockwise magnetic field B is generated in the first bent portion 32. B1 And the clockwise magnetic field B generated in coil 433 CC Consider an electrical junction box in which and interfere with each other. In this comparative example configuration, magnetic field B B1 And, magnetic field B CC The interference between these two magnetic fields causes the connection state of the contact portion 42 in the mechanical relay to become unstable. Specifically, the opening and closing of the main circuit contacts, which was previously performed by the contact between the movable contact 423 and the fixed contacts (first fixed contact 421, second fixed contact 422) of the mechanical relay, can now also be performed by the interference of the two magnetic fields. For example, when the contact portion 42 in the main circuit is normally open, the operation of the mechanical relay closes the main circuit. When the circuit is closed, the interference of the two magnetic fields may cause the relay 4 to momentarily disconnect. The momentarily disconnection of the relay 4 causes the main circuit to open. At that time, as shown in Figure 16, the movable contact 423 and the fixed contacts (first fixed contact 421, second fixed contact 422) of the mechanical relay are in a non-contact state.

[0054] On the other hand, in this embodiment, the electrical connection box 100 includes a first busbar 3A, a relay 4, an output wiring 6, and an input wiring 5. The first busbar 3A includes a first bent portion 32 through which the main circuit current flows in a first direction (-Z direction), and a first extended portion 33 extending from one end of the first bent portion 32 on the first direction side along a second direction (-Y direction) that intersects the first direction. The relay 4 includes a coil 433, an output terminal 432 which is the output terminal of the coil current of the coil 433, an input terminal 431 which is the input terminal of the coil current, and a contact portion 42 aligned in the second direction (-Y direction) with respect to the central axis of the coil 433. The output wiring 6 extends to the output terminal 432, and the input wiring 5 extends to the input terminal 431. The coil 433 is aligned with respect to the first bent portion 32 in a third direction (+X direction) that intersects the first and second directions. The input terminal 431 is aligned with the output terminal 432 in the third direction (+X direction). The output wiring 6 extends from the output terminal 432 along the second direction (-Y direction). The input wiring 5 comprises a first line 51 and a bypass line 52 that is continuous with one end of the first line 51 on the second direction (-Y direction) side. The first line 51 is aligned with the output wiring 6 in the fourth direction (-X direction), opposite to the third direction, and extends along the output wiring 6. The bypass line 52 extends to the input terminal 431, bypassing the output terminal 432. With this configuration, since the input wiring 5 extends to the input terminal while bypassing the output terminal 432, the magnetic field B generated in the coil 433 C There is no need to route the first busbar 3A in a way that avoids interference. Therefore, the enlargement of the electrical junction box 100 due to the routing of the first busbar 3A to the coil 433 of the relay 4 can be easily avoided. As described above, in the electrical junction box 100 according to this embodiment, the enlargement of the electrical junction box is less likely.

[0055] In this embodiment, the coil 433 has a counterclockwise magnetic field B relative to the first bent portion 32 when viewed from the first direction (-Z direction). C It is configured to generate. With this configuration, the bypass circuit 52 of the electrical junction box 100 extends to the input terminal 431, bypassing the output terminal 432, thereby preventing interference with the first busbar 3A. C This can generate the current I flowing through the first busbar 3A. B1 As a result, a counterclockwise magnetic field B is generated in the first bent portion 32. B1 And, magnetic field B C Since these do not interfere with each other, the connection state of the contact portion 42 in the mechanical relay can be stabilized. Therefore, the electrical junction box 100 according to this embodiment makes it easier to stabilize the circuit state in the main circuit.

[0056] In this embodiment, the electrical junction box 100 further comprises an insulating base member 1. The base member 1 includes a plate-shaped flat portion 10 having a first surface 10a facing the relay 4, and when the thickness direction of the flat portion 10 is aligned with the first direction (-Z direction), the flat portion 10 has a recessed housing portion (first housing portion 11) in the first direction (-Z direction). The housing portion (first housing portion 11) is configured to route the first extension portion 33 along the flat portion 10. With this configuration, the first extension portion 33 of the first busbar 3A is laid on the base member 1, which helps to avoid the enlargement of the electrical junction box 100 due to the routing of the first busbar 3A. Therefore, in the electrical junction box 100 according to this embodiment, the enlargement of the electrical junction box is less likely to occur.

[0057] In this embodiment, the first busbar 3A further includes a bypass section 34 that is continuous with one end of the first extension section 33 on the second direction (-Y) side. The contact section 42 includes a movable contact 423, a first fixed contact 421, and a second fixed contact 422. The first fixed contact 421 is aligned with respect to the second fixed contact 422 in the third direction (+X direction). The first extension section 33 is aligned with respect to the output wiring 6 in the fourth direction (-X direction). The bypass section 34 extends toward the first fixed contact 421, bypassing the second fixed contact 422. The movable contact 423 moves along the second direction (-Y direction) to electrically connect the first fixed contact 421 and the second fixed contact 422. With this configuration, the bypass circuit 52 of the electrical junction box 100 extends to the input terminal 431, bypassing the output terminal 432, thereby preventing interference with the first busbar 3A. C This can generate the current I flowing through the first busbar 3A. B1 As a result, a counterclockwise magnetic field B is generated in the first bent portion 32. B1 And, magnetic field B C Since these do not interfere with each other, the connection state of the contact portion 42 in the mechanical relay can be stabilized. Specifically, the connection state between the movable contact 423 and the fixed contacts (first fixed contact 421, second fixed contact 422) in the mechanical relay can be stabilized. Therefore, the electrical junction box 100 according to this embodiment makes it easier to stabilize the circuit state in the main circuit.

[0058] In this embodiment, at least a portion of the bypass section 34 extends in a fifth direction (+Z direction) opposite to the first direction. With this configuration, the current I flowing through the first busbar 3A B1 As a result, a counterclockwise magnetic field B is present in a part of the bypass section 34 when viewed from the first direction (-Z direction). B12 A magnetic field B is being generated. B12 And the magnetic field B generated by coil 433 C2 Since it can be confirmed that these do not interfere with each other, the magnetic field B generated in coil 433 C There is no need to route the first busbar 3A in a way that avoids interference. Therefore, the enlargement of the electrical junction box 100 due to the routing of the first busbar 3A to the coil 433 of the relay 4 can be easily avoided. As described above, in the electrical junction box 100 according to this embodiment, the enlargement of the electrical junction box is less likely to occur.

[0059] In this embodiment, the electrical connection box 100 further comprises a second busbar 3B, the second busbar 3B comprising a second bent portion 36 through which the main circuit current flows from the second fixed contact 422 toward the first direction (-Z direction). With this configuration, the current I flowing through the second busbar 3B B2As a result, the second bent portion 36 is subjected to a clockwise magnetic field B when viewed from the first direction (-Z direction). B2 A magnetic field B is being generated. B2 And, magnetic field B C Since it can be confirmed that these do not interfere with each other, the magnetic field B generated in coil 433 C There is no need to route the second busbar 3B in a way that avoids interference. Therefore, the enlargement of the electrical junction box 100 due to the routing of the first busbar 3A to the coil 433 of the relay 4 can be easily avoided. As described above, in the electrical junction box 100 according to this embodiment, the enlargement of the electrical junction box is less likely to occur.

[0060] (modified version) In this modified example, the "positive terminal" and the "negative terminal" of relay 4 may be swapped. In that case, the positional relationship between input terminal 431 and output terminal 432, the positional relationship between first fixed contact 421 and second fixed contact 422, and the positional relationship between first busbar 3A and second busbar 3B will be swapped. In this modified example, the bypass circuit 52 extends to the input terminal 431, bypassing the output terminal 432, thereby preventing interference with the magnetic field B of the first busbar 3A. C It can generate this.

[0061] One embodiment and its variations have been described above. However, the embodiments and variations are not limited to the examples described above. For example, the embodiments and variations may be implemented in combination with each other. [Explanation of symbols]

[0062] 100 Electrical junction box 1 Base member 2 Cover member 3 bus bars 3A First Bus Bar 3B Second Bus Bar 4 Relay 5 Input Wiring 6 Output Wiring 10 Plane part 10a 1st page 10b 2nd side 11. First Detention Unit 11A First containment unit 12 Second Detention Unit 12A, 12B Second containment area 21 Mounting part 31 Connection part 31h Through hole 32 First bending part 33 First extension section 34 Detour section 34h Through hole 36 Second bend 37 Second extension section 38 Extension 41 cases 41a Insulating rib 42 Contact point 421 First fixed contact 422 Second fixed contact 423 Movable contact 42h mounting holes 43 Operation circuit 431 Input terminals 432 Output terminals 433 Coil 44 Mounting part 44h mounting holes 51 First line 52 Detour Route 71 Fastening members 72 Fastening members 73 Fastening Members B B1 magnetic field B B2 magnetic field B B12 magnetic field B C magnetic field B C2 magnetic field B CC magnetic field D Tilt direction

Claims

1. A first busbar comprising a first bent portion through which the main circuit current flows in a first direction, and a first extended portion extending from one end of the first bent portion on the first direction side along a second direction intersecting the first direction, A relay comprising a coil, an output terminal which is the output terminal of the coil current, an input terminal which is the input terminal of the coil current, and contact portions aligned in the second direction with respect to the central axis of the coil, Output wiring extending to the aforementioned output terminal, Input wiring extending to the aforementioned input terminal, Equipped with, The coils are arranged in a third direction that intersects the first direction and the second direction with respect to the first bent portion. The input terminals are arranged in the third direction relative to the output terminals, The output wiring extends toward the output terminal along the second direction, The input wiring comprises a first line and a bypass line continuous with one end of the first line on the second direction side, The first line is aligned with respect to the output wiring in a fourth direction opposite to the third direction, and extends along the output wiring. The aforementioned bypass circuit extends to the input terminal, bypassing the output terminal. Electrical junction box.

2. The coil is configured to generate a counterclockwise magnetic field relative to the first bent portion when viewed from the first direction. The electrical junction box according to claim 1.

3. The insulating base member further comprises a plate-shaped flat portion having a first surface facing the relay, and when the thickness direction of the flat portion is aligned with the first direction, the flat portion has a housing portion recessed in the first direction. The housing section is configured such that the first extension is routed along the planar section. The electrical junction box according to claim 1.

4. The first busbar further comprises a bypass section continuous with one end of the first extension section on the second direction side, The contact portion includes a movable contact, a first fixed contact, and a second fixed contact. The first fixed contact is aligned in a third direction relative to the second fixed contact, The first extension portion is aligned with respect to the output wiring in the fourth direction, The bypass section extends toward the first fixed contact, bypassing the second fixed contact. The movable contact moves along the second direction to electrically connect the first fixed contact and the second fixed contact. An electrical junction box according to any one of claims 1 to 3.

5. At least a portion of the detour section extends in a fifth direction opposite to the first direction. The electrical connection box according to claim 4.

6. It also features a second bus bar, The second busbar is provided with a second bent portion through which the main circuit current flows from the second fixed contact toward the first direction. The electrical junction box according to claim 5.

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