JP5991106B2 - Wire harness system - Google Patents

Description

  The present invention relates to a wire harness system including a plurality of electric wires.

  Conventionally, various electric components are mounted on a vehicle, and these electric components are connected to a power source via a wire harness. As an example of this wire harness, the one described in Patent Document 1 is configured such that energization or disconnection of electrical components is performed by a switching element mounted on a vehicle.

JP 2007-186082 A

  In recent years, as the performance of vehicles increases, the number of electrical components tends to increase, and the number of switching elements that perform energization or disconnection of electrical components tends to increase. In this case, since the wire harness connected to the electrical component is also enlarged, it is necessary to secure a wide space in the vehicle for accommodating the switching element and the wire harness.

  However, with the demand for larger living spaces, it has become difficult to secure a space for mounting switching elements and wire harnesses in the vehicle, and miniaturization of wire harness systems including switching elements and wire harnesses. Was demanded.

  This invention is completed based on the above situations, Comprising: It aims at reducing a wire harness system.

The present invention relates to a wire harness system the rider is mounted on a vehicle having a passenger compartment for riding, have a wire bundle that is configured by bundling a plurality of electric wires are routed under the floor of the passenger compartment a wire harness, and a first electric component electrically connected to the electric wire, is electrically connected to the electric wire, the vehicle provided with a switching element that performs a conductive or disconnect to the first electric component A switching unit attached to the wire harness routed under the floor of the room, and the wire harness includes a switching element for energizing or disconnecting a second electrical component different from the first electrical component. are connected electrical junction box is mounted outside the vehicle compartment Te, the switching unit, Bei a body portion in which the switching element is accommodated, and a mounted portion continuous with said body portion , Wherein the switching unit by the mounting portion is wound by the binding member with the wire harness is attached to the wire harness.

According to this structure, since the switching unit provided with the switching element which performs electricity supply or electric disconnection of a 1st electrical component is attached to the wire harness, a wire harness system can be reduced in size.
Moreover, according to this structure, since a to-be-attached part is attached to a wire harness by attaching a to-be-attached part with a wire harness with a binding member according to this structure, a switching unit is attached to a wire harness with a simple structure. be able to. For example, even when the wire harness has a large diameter, the switching unit can be attached by lengthening the binding member. Therefore, it becomes possible to provide versatility while simplifying the configuration of the switch unit.
Further, since the second electrical component can be energized or disconnected by the switching element provided in the electrical junction box, the wire harness system can be multi-functionalized.

As embodiments of the present invention, the following embodiments are preferable.
-The to-be-attached part is plate shape, and is extended in the direction in alignment with the extension direction of the said wire harness.
If it does in this way, a switching unit can be arranged along a wire harness, simplifying the composition of a to-be-attached part.

-The to-be-attached part is equipped with the holding | maintenance protrusion which protrudes toward the opposite side to the said wire harness side, and hold | maintains the said binding member between the said main-body parts.
If it does in this way, it can prevent that a binding member remove | deviates from a to-be-attached part by simple structure.

-The switching element is a semiconductor switching element.
In this way, the noise of the switching element when energization or disconnection can be reduced, so that the switching element can be disposed in the passenger compartment or the like in which the passenger is boarded. Thereby, the accommodation space in a vehicle can be used effectively.

-The switching element is a mechanical relay.
If it does in this way, since a switching element is a comparatively cheap mechanical relay, it becomes possible to reduce the manufacturing cost of a wire harness.

  According to the present invention, it is possible to reduce the size of the wire harness system.

The schematic diagram which shows the state with which the wire harness system of Embodiment 1 was mounted in the vehicle. The figure which shows typically the state by which the switching unit was attached to the wire harness Front view showing the switching unit Plan view showing the switching unit Left side view showing the switching unit Bottom view showing switching unit Right side view showing the switching unit Rear view showing the switching unit Exploded perspective view showing the switching unit Front view showing the unit body Side view showing the unit body The figure which shows the electric composition of the wire harness system roughly The front view which shows the switching unit of Embodiment 2. Left side view showing the switching unit Side sectional view showing the switching unit Bottom view showing switching unit Exploded perspective view showing the unit body The exploded perspective view which showed the unit main body from the direction different from FIG. Disassembled front view of the unit body The figure which shows typically the state which attached the switching unit to the wire bundle of the temporary winding state of other embodiment The figure which shows typically the state which covered the switching unit of other embodiment with the protector. The figure which shows schematically the electric constitution of the wire harness system of other embodiment. The figure which shows schematically the electric constitution of the wire harness system of other embodiment.

<Embodiment 1>
The first embodiment will be described with reference to FIGS.
As shown in FIG. 1, the wire harness system 10 of this embodiment is mounted on a vehicle 12 such as an automobile, and a wire is provided between the electrical connection box 18, the first electrical component 20, and the second electrical component 23. It is configured by connecting with a harness 10A.

(Wire harness system 10)
The vehicle 12 has a compartment 13 in which a passenger is boarded. A power source 17 composed of a battery, an alternator, and the like is provided in front of the compartment 13 (inside the engine room outside the compartment). An electrical junction box 18 connected via the electric wire 11B is mounted.
The vehicle compartment 13 includes an underfloor, and the wire harness 10A is routed under the underfloor.

  An instrument panel 14 is arranged at the front of the passenger compartment 13. The instrument panel 14 is provided with a manual switch 15 for instructing energization or disconnection of at least one of the first electrical component 20 and the second electrical component 23. For example, the manual switch 15 can be operated to turn on or off the seat heater 21 that is the first electrical component 20, and a signal corresponding to the operation of the manual switch 15 and the electric switch 11 and the electric wire 11A (signal line) ) To a switching unit 27 which will be described later.

  The electric wire 11A connected to the manual switch 15 is routed from the instrument panel 14 under the floor, and is bundled together with the electric wire bundle 11 formed by bundling a plurality of electric wires 11A.

  In the electrical connection box 18, the second electrical component 23 is energized or interrupted, and the first electrical component 20 is not energized or disconnected. It is mounted (see FIG. 12). The switching element 19 may be either a semiconductor relay or a mechanical relay or one of them.

  The first electrical component 20 is an individual electrical component that is used only in the same vehicle type. For individual electrical components, electrical components used only for models with different vehicle names, electrical components used only for models with different displacements, electrical components used only for models with different specifications, and models with different destinations Includes electrical components used only in

  In the present embodiment, as shown in FIG. 1, the first electrical component 20 is a seat heater 21 and a rear seat room light 22, but is not limited thereto, for example, a diisa, a DRL system, a fog lamp, a horn It is also possible to use a PTC heater or the like.

  The seat heater 21 is embedded in a seat 16 attached to the passenger compartment 13 on which the passenger gets. Further, the rear seat room light 22 is disposed near the ceiling of the rear seat in the passenger compartment 13.

  The second electrical component 23 is a common electrical component that is also used in other vehicle types. In the present embodiment, the second electrical component 23 is a taillight 24. However, the second electrical component 23 is not limited to this, and is not limited to this. It is also possible to use a washer pump, a rear window defroster, or the like. The second electrical component 23 is energized or disconnected by the switching element 19 of the electrical junction box 18.

  "Vehicle type" includes differences in vehicle names, displacements, specifications, and destinations. More specifically, for example, when the car name is different, the car name is the same but the displacement is different, the car name and the displacement are the same, but the specifications are different, but the car name is also the exhaust. The amount and specifications are the same, but include cases where the destination is different. That is, the “other vehicle type” refers to a vehicle in which at least one of the vehicle name, the displacement, the specification, and the destination is different.

(Wire harness 10A)
The wire harness 10A is routed at an arbitrary position as required, such as under the floor of the vehicle 12, in a pillar, or the like. In the present embodiment, the wire harness 10A is routed so as to pass under the floor of the vehicle 12 (below the seat in the vehicle interior).

  The wire harness 10A is branched at a plurality of locations, and the first electrical component 20 and the second electrical component 23 are connected to the terminals of the electric wire 11A constituting the branched wire harness 10A.

  The electric wire 11A is formed by covering the outer periphery of a core wire (not shown) with an insulating layer made of synthetic resin. The core wire is made of a conductive material such as metal or carbon nanotube. In the present embodiment, a stranded wire formed by twisting metal thin wires is used. As the metal used for the stranded wire, any metal such as copper, copper alloy, aluminum, aluminum alloy, iron, iron alloy, etc. can be appropriately selected as necessary. In the present embodiment, copper or a copper alloy is used for the core wire.

An on / off signal of the switching element 28 for energizing or disconnecting the first electrical component 20 is directly transmitted from the manual switch 15 without passing through the electrical connection box 18.
Thereby, when energization or disconnection of the first electrical component 20 is instructed by the manual switch 15 disposed on the instrument panel 14, the signal from the manual switch 15 (the distance between the wire harnesses 10A is long). ) It is given directly to the switching element 28 without going through the electrical connection box 18 (the distance between the wire harnesses 10A is short), and the switching element 28 is turned on and off.

  The power supply 17 and the switching elements 19 and 28 are electrically connected via a fuse 26 as shown in FIG. The fuse 26 may be a fuse formed of a metal conductor, or may be an overcurrent cutoff device with an overcurrent protection function realized by an electric circuit, and may be realized by a program for controlling a switching element. It may be an overcurrent protection function.

As shown schematically in FIG. 2, the wire harness 10 </ b> A has a tape 25 coated with an adhesive on one surface of the wire bundle 11 in which a plurality of wires 11 </ b> A are bundled so that the wire bundle 11 is hidden. It is formed by turning (wrapping).
Some of the electric wires 11A constituting the electric wire bundle 11 are connected to a switching unit 27 including a switching element 28. Since the tape 25 is not wound around the switching unit 27, the electric wire 11A is exposed to the outside of the wire harness 10A. ing. The switching unit 27 is attached to the wire harness 10 </ b> A by a tape 39 different from the tape 25.

(Switching unit 27)
As shown in FIG. 3, the switching unit 27 is provided on a substantially lower half side of the figure, a main body part 27C in which a unit main body 29 is arranged, and on a substantially upper half side of the figure, the main body part 27C. A continuous plate-like attached portion 37 is provided.
As shown in FIG. 9, the unit main body 29 is accommodated in a case 36 made of synthetic resin.

The unit body 29 includes a circuit board 30 on which the switching element 28 is mounted, and a connector housing 33 that is electrically connected to the circuit board 30.
The circuit board 30 is formed by forming a conductive path (not shown) on an insulating substrate by a printed wiring technique. The circuit board 30 includes a first surface 31 to which the connector housing 33 is attached, and a second surface 32 that is the back surface of the first surface 31 and on which the switching element 28 is mounted.

As shown in FIG. 10, the switching element 28 is electrically connected to the second surface 32 of the circuit board 30 by a known technique such as soldering to a conductive path formed on the circuit board 30. In the present embodiment, two switching elements 28 are arranged side by side on the second surface 32 of the circuit board 30. Note that the switching unit 27 provided in the switching unit 27 may be one or more than two.
The switching element 28 is a semiconductor switching element made of a MOSFET or the like, and executes energization or disconnection of the first electrical component 20.

  The connector housing 33 is made of synthetic resin and includes a mounting portion 34 to which a plurality of terminals (not shown) are mounted as shown in FIG. The mounting portion 34 is formed with a plurality of concave portions 34A into which terminals are inserted.

  A female terminal attached (connected) to the terminal portion of the electric wire 11A is fitted into the plurality of concave portions 34A. Specifically, for example, one end side is connected to the other end side of the electric wire 11A connected to the electrical components 20 and 23, and one end side is connected to the other end side of the electric wire 11A connected to the manual switch 15. A terminal etc. is inserted. The terminal fitted in the recess 34A is prevented from being detached by a retaining mechanism (not shown) inside the recess 34A.

  The connector housing 33 holds a plurality of metal terminals 29A having a thin rod shape. One end side of the terminal 29 </ b> A is held inside the connector housing 33. The other end of the terminal 29 </ b> A penetrates the connector housing 33, is bent at a substantially right angle toward the circuit board 30 behind the connector housing 33, and is inserted into the through hole 30 </ b> A of the circuit board 30. The terminal 29A is electrically connected to the conductive path of the circuit board 30 by a known method such as soldering in the through hole 30A.

  In this embodiment, the female terminal is inserted into the recess 34A of the mounting portion 34. However, as another embodiment, the male terminal may be inserted into the recess 34A of the mounting portion 34. Also, the mounting part is a female connector with a terminal mounted inside, and it is configured to be fitted to the mating male connector, or the mounting part is a male connector mounted inside, and the mating female connector And may be fitted.

The case 36 includes a case main body 36A in which the unit main body 29 is accommodated, and a mounted portion 37 that is attached to the wire harness 10A.
The case main body 36A has a bottomed cylindrical shape that is open on one side, and includes a rectangular bottom surface portion 38E and four side wall portions 38A to 38D that extend in a direction orthogonal to the periphery of the bottom surface portion 38E.

An attached portion 37 formed flush with the side wall 38A extends from one side wall 38A of the four side walls 38A to 38D.
The attached portion 37 has a rectangular plate shape, and is provided at the tip portion of the plate-like portion 37A and the case main body 36A (main body portion 27C) with a tape 39 ("binding member"). Holding protrusion 37 </ b> B that holds an example).

  The holding protrusion 37 </ b> B is formed over the entire width of the tip of the attached portion 37, and the protruding dimension is equal to or greater than the thickness dimension of the tape 39. When a plurality of tapes 39 are stacked and wound, the protruding dimension of the holding projection 37B may be equal to or greater than the thickness of the plurality of stacked tapes 39. The tape 39 has one surface coated with an adhesive, and various known tapes can be used.

  The case 36 and the unit main body 29 are kept in a fitted state by, for example, pressing the outer periphery (outer edge) of the unit main body 29 on the mounting portion 34 side inside the opening edge of the case 36 or providing a lock mechanism. You may make it do. As the locking mechanism, for example, an elastic claw piece protruding from one side may be fitted and held in the other concave portion.

  The switching unit 27 in which the unit main body 29 is accommodated in the case 36 is attached to the wire harness 10 </ b> A by attaching the attached portion 37 together with the wire harness 10 </ b> A by the tape 25.

  Of the plurality of switching units 27, the switching unit 27 </ b> A including the switching element 28 for energizing or disconnecting the seat heater 21 is located below the seat 16 disposed in the passenger compartment 13 as shown in FIG. 1. , The wire 11 </ b> A is disposed near the branch portion 35 where the wire 11 </ b> A branches from the wire harness 10 </ b> A to the seat heater 21.

  Similarly, of the plurality of switching units 27, the switching unit 27B including the switching element 28 that performs energization or disconnection on the rear seat room light 22 is connected to the rear seat room light 22 from the wire harness 10A. 11A is disposed in the vicinity of the branch portion 35 where the branch is made.

(How to attach the switching unit 27 to the wire bundle 11)
A wire bundle 11 configured by bundling a plurality of electric wires 11A is wound around the tape 25 a plurality of times at predetermined intervals in the extending direction to form the wire bundle 11 in a temporarily wound (roughly wound) state. A wire harness 10 </ b> A in which the wire bundle 11 is fully wound is formed by further winding the wound wire bundle 11 with the tape 25. At this time, the switching unit 27 at the end of the electric wire 11 </ b> A constituting the electric wire bundle 11 is branched from the wire harness 10 </ b> A without winding the tape 25.

  Next, the extending direction of the attached portion 37 in the switching unit 27 is a direction along the extending direction of the wire harness 10A, and the attached portion 37 is brought into contact with the outer surface of the tape 25 wound around the wire harness 10A. 27 is placed on the wire harness 10A. And the to-be-attached part 37 is wound with the tape 39 with 10 A of wire harnesses. This winding may be performed once or multiple times. Thereby, the wire harness system 10 is formed by similarly winding the other switching units 27 around the wire harness 10A.

According to this embodiment, the following operations and effects are achieved.
(1) According to this embodiment, since the switching unit 27 provided with the switching element 28 for energizing or disconnecting the first electrical component 20 is attached to the wire harness 10A, the wire harness system 10 is downsized. it can.
Moreover, since the to-be-attached part 37 is attached to the wire harness 10A because the to-be-attached part 37 is wound by the tape 39 (bundling member) with the wire harness 10A, the switching unit 27 has the simple configuration. It can be attached to the wire harness 10A. For example, even when the wire harness 10A has a large diameter, the switching unit 27 can be attached by making the tape 39 (bundling member) longer. Therefore, it becomes possible to provide versatility while simplifying the configuration of the switching unit 27.

(2) The attached portion 37 has a plate shape and extends in a direction along the extending direction of the wire harness 10A.
In this way, the switching unit 27 can be arranged along the wire harness 10 </ b> A while simplifying the configuration of the attached portion 37.

(3) The attached portion 37 includes a holding protrusion 37B that protrudes toward the side opposite to the wire harness 10A side and holds the tape 39 (binding member) between the main body portion 27C.
In this way, it is possible to prevent the tape 39 from coming off the attached portion 37 with a simple configuration.

(4) The switching element 28 is a semiconductor switching element.
In this way, the noise of the switching element 28 when energization or disconnection can be reduced, so that the switching element 28 can be disposed in the passenger compartment 13 or the like in which the occupant is boarded. Thereby, the accommodation space in the vehicle 12 can be used effectively.

(5) The electrical connection box 18 provided with the switching element 19 which performs energization or power disconnection of the 2nd electrical component 23 different from the 1st electrical component 20 is connected to 10 A of wire harnesses.
In this way, since the second electrical component 23 can be energized or disconnected by the switching element 19 provided in the electrical junction box 18, the wire harness system 10 can be multifunctional.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS. A switching unit 40 according to the second embodiment includes a mechanical relay 41 instead of the semiconductor switching element 28 according to the first embodiment. In the following, the same components as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

As shown in FIG. 15, the switching unit 40 includes a unit main body 42 housed in a synthetic resin case 52, and includes a main body portion 40 </ b> A and a plate-like attached portion 54 connected to the main body portion 40 </ b> A. .
The main body portion 40 </ b> A includes a unit main body 42 and a case main body 52 </ b> A that accommodates the unit main body 42 in the case 52.

As shown in FIG. 17, the unit body 42 includes a circuit portion 43 on which the mechanical relay 41 and the electronic component 44 are mounted, a synthetic resin base portion 46 that holds the circuit portion 43, and a mating connector (not shown). And a hood-like fitting portion 50 to be fitted.
The mechanical relay 41 opens and closes the contact portion by passing a current through the coil, and a known relay can be used.

The electronic component 44 is composed of a component such as a resistor. In the circuit portion 43, the bus bar terminal 51 is integrally formed, and a plurality of through holes 43A through which the terminals of the mechanical relay 41 and the electronic component 44 are inserted are formed.
The bus bar terminal 51 is press-fitted into a terminal insertion hole 50 </ b> B provided in the back wall of the fitting portion 50.

In the present embodiment, in the circuit unit 43, two mechanical relays 41 are arranged side by side in the insertion direction of the unit main body 42 into the case 52. In addition, the number of the mechanical relays 41 provided in the switching unit 40 may be one, or may be three or more.
The mechanical relay 41 performs energization or disconnection on the first electrical component 20.

  The base 46 is box-shaped, and a partition wall 47 that partitions the mechanical relay 41 and electronic component 44 side of the circuit unit 43 from the outside is formed by molding, for example. On the surface opposite to the surface on which the mechanical relay 41 and the electronic component 44 are mounted, as shown in FIG. 18, a solder pool 49 is provided at a position continuous with the through hole through which the terminals of the mechanical relay 41 and the electronic component 44 are inserted. Is recessed.

The bus bar terminal 51 inserted through the fitting portion 50 passes through the partition wall 47 on the fitting portion 50 side.
The case main body 52A has a bottomed cylindrical shape, and includes a rectangular bottom surface portion 53E and four side wall portions 53A to 53D extending in a direction orthogonal to the bottom surface portion 53E, as shown in FIG.

From one side wall part 53A-53D of the four side wall parts 53A-53D, the to-be-attached part 54 formed in the said side wall part 53A-53D and the said flat surface is extended.
The attached portion 54 has a rectangular plate shape, and includes a plate-like portion 54A and a holding projection 54B that is provided at the distal end portion of the plate-like portion 54A and holds the tape 39 between the main body portion 40A.

  The holding projection 54B is formed over the entire width of the tip of the mounted portion 54, and the projection dimension is equal to or greater than the thickness dimension of the tape 39 as a binding member.

  The fitting part 50 is assembled and fixed to the bus bar terminal 51 side of the circuit part 43, and a locking convex part 50 </ b> A is provided on the outer surface of the fitting part 50. The locking projection 50 </ b> A has an inclined surface in which the opening side of the case 52 protrudes in a stepped shape and becomes lower toward the side opposite to the opening side of the case 52, and the locking portion is formed on the inner surface of the case 52. The unit main body 42 is prevented from coming off from the case 52 by being locked to the hole edge of the hole 52B.

  According to the second embodiment, since the switching element is the relatively inexpensive mechanical relay 41, the manufacturing cost of the wire harness 10A can be reduced.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above embodiment, after forming the wire harness 10A in which the tape 39 is wound (mainly wound) on the entire wire bundle 11, the attached portions 37 and 54 of the switching units 27 and 40 are attached to the tape 39 together with the wire harness 10A. However, the present invention is not limited to this. For example, as schematically shown in FIG. 20, the tape 25 is temporarily wound (roughly wound) to the extent that the plurality of wires 11A are exposed. On the other hand, the attached portion 37 of the switching unit 27 is wound around the tape 39 and attached to the temporarily wound wire bundle 11 (wire harness), and the tape 25 is wound around the temporarily wound wire bundle 11 and the switching unit 27 (main winding). You may do it.

(2) In the present embodiment, the shape of the attached portion 37 is a flat plate shape, but is not limited thereto. For example, the surface of the attached portion on the side of the wire harness 10A may be curved so as to follow the outer surface shape of the wire harness 10A. Moreover, it is good also not only as the surface by the side of the wire harness 10A of a to-be-attached part but it is good also as plate shape in which the whole to-be-attached part curved.

(3) As schematically shown in FIG. 21, a protector 57 that surrounds the outer periphery of the wire harness 10 </ b> A may be disposed, and the switching unit 27 may be fixed in the protector 57. For the protector 57, any material such as a synthetic resin or a metal can be appropriately selected as necessary.

(4) In the said embodiment, although the wire harness system 10 was provided with the electrical junction box 18, it is good also as the wire harness system 10 which does not have the electrical junction box 18. FIG. For example, as shown in FIG. 22, the electrical connection box 18 is not provided, but a plurality of detachable fuses 26 are provided with a fuse block 58 arranged in parallel, and various electrical components are connected via the fuses 26 of the fuse block 58. In addition to being electrically connected to the products 20, 23, the switching element 28 of the switching unit 27 provided corresponding to the various electrical components 20, 23 is turned on and off by an overcurrent protection function (overcurrent cutoff function) or the like. May be.

  The overcurrent protection function may be realized by an electric circuit formed in the switching element or an electric circuit formed in the switching unit, and is realized by a program for controlling energization or interruption of the switching element. It may be what was done.

  Further, as shown in FIG. 23, a single fuse 26 is detachably connected between a plurality of power supplies 17 and 17 connected in parallel, and the downstream side electric wire 11A is branched to switch the switching unit 27. The element 28 may be connected in parallel with the various electrical components 20 and 23.

(5) Instead of the tape 39, a band such as a string or a band may be used as a binding member. This band may be made of synthetic resin or metal, and a band having a known shape used for bundling the plurality of electric wires 11A can be used.

(6) The manual switch 15 is configured to be disposed on the instrument panel 14, but is not limited thereto, and may be disposed on the armrest of the door, and can be disposed at any position as necessary. . Further, the switching unit 27 may be controlled by an electronic control unit such as a body ECU instead of the manual switch 15.

(7) It is good also as a structure by which both the switching element 28 and the mechanical relay 41 are accommodated in the inside of a switching unit.

(8) Although the switching units 27 and 40 are arranged in the passenger compartment 13 of the vehicle 12, as a reference example , the switching units 27 and 40 are not limited to this and can be arranged in any place of the vehicle 12. For example, the switching units 27 and 40 may be arranged in the engine room as a reference example .

(9) In the above embodiment, one switching unit 27, 40 is provided for one first electrical component 20, but not limited to this, for one first electrical component 20, The first electrical component 20 may have a plurality of switching units that can be turned on / off together. Moreover, it is good also as a structure which has one switching unit which can turn on / off the some 1st electrical component 20. FIG.

DESCRIPTION OF SYMBOLS 10 ... Wire harness system 10A ... Wire harness 11 ... Wire bundle 11A ... Electric wire 12 ... Vehicle 13 ... Vehicle compartment 15 ... Manual switch 17 ... Power supply 18 ... Electric junction box 19 ... Switching element 20 ... First electrical component 21 ... Seat heater 22 ... rear seat room light 23 ... second electrical component 24 ... tail light 25 ... tape 26 ... fuse 27 (27A, 27B), 40 ... switching unit 27C, 40A ... main body 28 ... switching element 29, 42 ... unit main body 30 , 43 ... Circuit board 34 ... Mounting part 36, 52 ... Case 36A, 52A ... Case body 37, 54 ... Mounted part 37A, 54A ... Plate-like part 37B, 54B ... Holding projection 39 ... Tape (binding member)
41. Mechanical relay (switching element)
50 ... fitting part

Claims (5)

A wire harness system mounted on a vehicle having a passenger compartment on which a passenger is boarding ,
Have a wire bundle that is configured by bundling a plurality of electric wires, a wire harness arranged under the floor of the passenger compartment,
A first electrical component electrically connected to the wire;
A switching unit that is electrically connected to the electric wire and includes a switching element for energizing or disconnecting the first electrical component, and is attached to the wire harness routed under the floor of the passenger compartment. Prepared,
The wire harness is connected to an electrical connection box that is mounted outside the vehicle compartment with a switching element that performs energization or disconnection of the second electrical component different from the first electrical component,
The switching unit includes a main body portion in which the switching element is accommodated, and a mounted portion connected to the main body portion,
The wire harness system by which the said switching unit is attached to the said wire harness because the said to-be-attached part is wound with a binding member with the said wire harness.   The wire harness system according to claim 1, wherein the attached portion has a plate shape and extends in a direction along an extending direction of the wire harness.   The wire harness system according to claim 2, wherein the attached portion includes a holding protrusion that protrudes toward the side opposite to the wire harness side and holds the binding member between the main body portion.   The wire harness system according to any one of claims 1 to 3, wherein the switching element is a semiconductor switching element.   The wire harness system according to any one of claims 1 to 3, wherein the switching element is a mechanical relay.

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