JP6878105B2 - Electrical junction box and wire harness - Google Patents

Description

The present invention relates to electrical junction boxes and wire harnesses.

Conventionally, there are known electric junction boxes (also called junction boxes, fuse boxes, relay boxes, etc.) that are mounted on vehicles such as automobiles and that collectively house electronic components such as wire harnesses, fuses, and relays. .. As described in Patent Document 1, for example, such an electric connection box includes a body, a lower cover, and an electric wire through hole provided in the lower cover for passing an electric wire. This electric wire through hole is provided for passing an electric wire electrically connected to an electronic component assembled in an electric connection box.

Japanese Unexamined Patent Publication No. 2016-208671

In the above-mentioned electrical junction box, the thickness (outer diameter) of the electric wire bundle may differ depending on the number and types of electronic components. For example, when the outer diameter of the wire bundle is considerably smaller than the inner diameter of the wire through hole, the wire bundle is bound and fixed together with a part of the lower cover at the exit of the wire through hole with adhesive tape or the like, but the wire bundle is passed through the wire. There is a risk of shifting along the circumferential direction of the hole.

An object of the present invention is to provide an electric junction box and a wire harness capable of suppressing a positional deviation of a bundle of electric wires passing through an electric wire through hole in the circumferential direction.

In order to achieve the above object, the electric junction box according to the present invention is provided on a housing for accommodating at least one electronic component in an internal space and on the wall surface of the housing, and is electrically connected to the electronic component. the hole through the wire through the wire bundle that bundles a plurality of electric wires and one that is, wherein the wire insertion hole has a positioning portion for positioning the wire bundle of one, the positioning unit, It has two protrusions that extend in the extending direction of one wire bundle and project inward from the inner peripheral surface, and the two protrusions have a distance in the circumferential direction and an outer diameter. when the wire bundle of one with the smallest is in contact with two of said protrusions is formed so as to contact with the inner peripheral surface connecting between two of said projections, and the outer diameter is maximum When one of the electric wire bundles abuts on the two protrusions, the electric wire bundle is formed without abutting on the inner peripheral surface .

In the electrical connection box, it is preferable that the protrusion has a triangular cross section in the extending direction.

In the electrical connection box, it is preferable that the positioning portion has a portion in which the two protrusions are formed so as to project to the outside of the housing along the extending direction.

In order to achieve the above object, the wire harness according to the present invention is provided on a housing for accommodating at least one electronic component in an internal space and on the wall surface of the housing, and is electrically connected to the electronic component. An electric connection box including an electric wire through hole for passing a bundle of electric wires by bundling a plurality of electric wires, one said bundle of electric wires, and one said bundle of electric wires together with a part of the electric connection box. comprising a binding member for binding, and the wire insertion hole has a positioning portion for positioning the wire bundle of one, the positioning portion may extend in the extending direction of one of the wire bundle, Moreover, it has two protrusions protruding inward from the inner peripheral surface, and the two protrusions have two protrusions in which one wire bundle having the minimum outer diameter is spaced in the circumferential direction. One of the electric wire bundles, which is formed so as to abut on the inner peripheral surface connecting the two protrusions and has the maximum outer diameter, abuts on the two protrusions. When this is done, the positioning portion is formed without abutting on the inner peripheral surface, and the positioning portion is further formed with two protrusions and a protrusion that protrudes to the outside of the housing along the extending direction. The binding member is characterized in that one bundle of electric wires is bound together with the protruding portion.

According to the electric junction box and the wire harness according to the present invention, it is possible to suppress the positional deviation of the electric wire bundle passing through the electric wire through hole in the circumferential direction.

FIG. 1 is a perspective view showing a schematic configuration of an electrical junction box according to an embodiment. FIG. 2 is a perspective view of a main part of a housing constituting the electrical connection box according to the embodiment. FIG. 3 is a cross-sectional view of a main part of a housing constituting the electrical connection box according to the embodiment.

Hereinafter, the electric junction box and the wire harness according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiments shown below. In addition, the components in the following embodiments include those that can be easily replaced by those skilled in the art, or those that are substantially the same.

[Embodiment]
FIG. 1 is a perspective view showing a schematic configuration of an electrical junction box according to an embodiment. FIG. 2 is a perspective view of a main part of a housing constituting the electrical connection box according to the embodiment. FIG. 3 is a cross-sectional view of a main part of a housing constituting the electrical connection box according to the embodiment. Note that FIG. 3 is a partial cross-sectional view of a main part in AA of FIG. Further, the vertical direction shown in the figure is the vertical direction of the electrical connection box in the present embodiment.

The electric junction box 1 according to the present embodiment is mounted on a vehicle such as an automobile and distributes electric power supplied from a power source such as a battery to various electronic devices in the vehicle via an electronic component 4 such as a relay. Is. The electric junction box 1 is installed in a place exposed to an external environment, such as an engine room of a vehicle, and is connected between a power source and various electronic devices. As shown in FIG. 1, the electric junction box 1 is incorporated in a wire harness WH and integrates electronic components 4 such as connectors, fuses, relays, branch parts, and electronic control units that constitute connection processing components such as electric wires. And house it inside. The electric connection box 1 may also be referred to as a junction box, a fuse box, a relay box, or the like, but in the present embodiment, these are collectively referred to as an electric connection box.

As shown in FIG. 1, the electrical junction box 1 includes a housing 2. In the electrical connection box 1, a vehicle mounting portion (not shown) provided on the outside of the housing 2 is brought into contact with a mounting panel (not shown) on the vehicle side, and a fastening member such as a bolt (not shown) is used to bring the vehicle mounting portion (not shown). It is installed in the vehicle by fastening the mounting panel on the vehicle side and the mounting panel on the vehicle side. The electric junction box 1 is installed in the vehicle so that the vertical direction coincides with the vertical direction or is at an arbitrary angle with the vertical direction in the installed state of the housing 2 installed in the engine room of the vehicle.

Here, the wire harness WH is, for example, a bundle of a plurality of electric wires used for power supply and signal communication for connection between devices mounted on a vehicle, and a plurality of electric wires are connected by a connector or the like. It is designed to be connected to each device at once. The wire harness WH includes a wire bundle W and an electric junction box 1 that is electrically connected to the wire bundle W. The electric wire constituting the electric wire bundle W is composed of, for example, a conductor portion (core wire) in which a plurality of conductive metal strands are twisted together, and an insulating covering portion that covers the outside of the conductor portion. The electric wire bundle W in the present embodiment is a bundle of a plurality of electric wires electrically connected to the electronic component 4, and has a thickness (thickness) according to the number, type, and the like of the electronic component 4 accommodated in the electrical connection box 1. Outer diameter) may be different. For example, when the maximum number of electronic components 4 that can be accommodated in the electrical connection box 1 is accommodated, the outer diameter of the electric wire bundle W becomes the maximum (Wmax) as shown in FIG. On the other hand, when the minimum number of electronic components 4 is accommodated in the electrical connection box 1, the outer diameter of the electric wire bundle W becomes the minimum (Wmin) as shown in FIG. In the wire harness WH, the electrical connection box 1 is electrically connected to the end of the wire bundle W in the extending direction via a connector or the like as a connecting portion. The wire harness WH may include a grommet, a protector, a fixture, and the like.

As shown in FIG. 1, the housing 2 is formed in a box shape by an insulating synthetic resin, and at least one electronic component 4 is housed in the internal space 2a formed inside. Here, the electronic component 4 is connected to the electric wire bundle W inserted into the internal space 2a from the electric wire through hole 31 of the electric wire passing portion 30 provided on the wall surface of the housing 2. The housing 2 includes a frame 3, an upper cover 5, and a lower cover 7, and has a structure in which a plurality of layers (three layers) are laminated in the order of the lower cover 7, the frame 3, and the upper cover 5 from the lower side. There is.

The frame 3 is a part of the housing 2. As shown in FIG. 1, the frame 3 has a substantially rectangular outer peripheral shape when viewed from above and below in the installed state. The frame 3 has an internal space 3a. The internal space 3a is a part of the internal space 2a of the housing 2. In the installed state, the frame 3 has a lower opening (not shown) formed at the lower end and an upper opening 3b formed at the upper end. The frame 3 is formed in a hollow shape in which the lower opening and the upper opening 3b communicate with each other via the internal space 3a in the vertical direction. In the frame 3, the internal space 3a is divided into a plurality of sections, and a box or an electronic component 4 in which the electronic component 4 is housed in the partitioned space is directly inserted and held through the opening 3b. .. The frame 3 is provided with an electric wire passing portion 30 on one of the wall surfaces in the longitudinal direction.

The electric wire passing portion 30 is a portion formed in an inverted L shape downward from the wall surface and into which the electric wire bundle W is inserted into a substantially tubular shape. The electric wire passing portion 30 is formed so as to lead out the electric wire bundle W from the lateral direction orthogonal to the longitudinal direction of the frame 3 in the downward direction. The electric wire passing portion 30 includes an electric wire passing hole 31, a protruding portion 33, and a positioning portion 35.

The electric wire through hole 31 is a hole through which the electric wire bundle W is passed. As shown in FIGS. 2 and 3, the electric wire through hole 31 is formed by combining the frame 3 and the lower cover 7. That is, in the electric wire through hole 31, the inner peripheral surface 31a is composed of the frame 3 and the lower cover 7. The inner peripheral surface 31a of the electric wire through hole 31 is formed in an inverted L shape from the lateral direction to the downward direction, and the electric wire bundle W to be inserted is led out toward the downward direction.

The protruding portion 33 is a portion that protrudes from the opening of the electric wire through hole 31 and extends in the extending direction of the electric wire bundle W. The protrusion 33 has a substantially arcuate cross section in the extending direction (here, the lower direction shown in FIG. 1). The protruding portion 33 is a portion that is bound together with the electric wire bundle W by a binding member 41 such as a vinyl adhesive tape for a wire harness or a binding band.

The positioning portion 35 is a portion for positioning the electric wire bundle W in the circumferential direction of the inner peripheral surface 31a of the electric wire through hole 31. The positioning portion 35 has two protruding portions 35a and 35b extending in the extending direction of the electric wire bundle W and projecting inward from the inner peripheral surface 31a of the electric wire through hole 31. The two protrusions 35a and 35b are connected between the two protrusions 35a and 35b when the electric wire bundle Wmin having the smallest outer diameter is in contact with the two protrusions 35a and 35b. It is formed so as to abut the inner peripheral surface 31a. Each of the protrusions 35a and 35b has a triangular cross section in the extending direction.

The upper cover 5 is a part of the housing 2. The upper cover 5 is located on the upper side of the frame 3 in the installed state and closes the opening 3b on the upper side of the frame 3. The upper cover 5 is formed in a substantially rectangular shape whose outer peripheral shape is the same as (including substantially the same) the outer peripheral shape of the frame 3 when viewed from the vertical direction. The upper cover 5 has an internal space (not shown). This internal space is a part of the internal space 2a of the housing 2. The upper cover 5 is locked to the frame 3 by a locking mechanism in a state where the opening of the upper cover 5 faces the opening 3b of the frame 3 in the vertical direction and the opening 3b is closed.

The lower cover 7 is a part of the housing 2. The lower cover 7 is located on the lower side of the frame 3 in the installed state and closes the opening on the lower side of the frame 3. The lower cover 7 is formed in a substantially rectangular shape whose outer peripheral shape is the same as (including substantially the same) the outer peripheral shape of the frame 3 when viewed from the vertical direction. The lower cover 7 has an internal space (not shown). This internal space is a part of the internal space 2a of the housing 2. Therefore, the internal space 2a of the housing 2 is composed of the internal space 3a of the frame 3, the internal space of the upper cover 5, and the internal space of the lower cover 7. The lower cover 7 is locked to the frame 3 by a locking mechanism in a state where the opening of the lower cover 7 faces the opening on the lower side of the frame 3 in the vertical direction and the opening is closed.

Next, the procedure for assembling the electrical connection box 1 according to the present embodiment will be described. The procedure for assembling the electrical connection box 1 is not limited to the one described below. Since the electrical connection box 1 shown in FIG. 1 may be configured after assembly, the procedures shown below are appropriately before and after. You may.

First, the worker inserts the electric wire bundle W into the internal space 3a from the lower side of the frame 3 and fixes it to the frame 3. Next, the worker assembles the electronic component 4 to the frame 3 from the upper side of the frame 3 via the opening 3b, and electrically connects the electronic component 4 and the electric wire bundle W. Next, the worker positions the lower cover 7 on the lower side of the frame 3, inserts the lower cover 7 from the lower side of the frame 3 while aligning the electric wire bundle W along the inner peripheral surface 31a of the electric wire through hole 31, and inserts the lower cover 7 from the lower side of the frame 3. The lower cover 7 is locked by a locking mechanism. Next, the worker positions the upper cover 5 on the upper side of the frame 3 so that the upper cover 5 and the opening 3b of the frame 3 face each other, and assembles the upper cover 5 on the upper side of the frame 3 to engage. Locked by a stop mechanism. Next, the worker binds the electric wire bundle W extending from the electric wire through hole 31 together with the protruding portion 33 by the binding member 41 along the inner peripheral surface 31a of the protruding portion 33 and fixes it to the frame 3 side. .. At this time, for example, when bundling the electric wire bundle Wmin having the smallest outer diameter of the electric wire bundle W, the electric wire bundle Wmin is fixed to the frame 3 side so as to be sandwiched between the protrusions 35a and 35b of the positioning portion 35. On the other hand, when binding the electric wire bundle Wmax having the largest outer diameter of the electric wire bundle W, the electric wire bundle Wmax is fixed to the frame 3 side along the protrusions 35a and 35b of the positioning portion 35. As described above, the assembly of the electrical connection box 1 is completed.

As described above, the electric connection box 1 according to the present embodiment is provided on the wall surface of the housing 2 and the housing 2 that accommodates at least one electronic component 4 in the internal space 2a, and is electrically connected to the electronic component 4. A wire through hole 31 for passing a wire bundle W, which is a bundle of a plurality of wires connected to the above, is provided. The wire through hole 31 has a positioning portion 35 for positioning the wire bundle W. The positioning portion 35 has two protruding portions 35a and 35b extending in the extending direction of the electric wire bundle W and projecting inward from the inner peripheral surface 31a. The two protrusions 35a and 35b connect the two protrusions 35a and 35b when the electric wire bundle Wmin having the smallest outer diameter is in contact with the two protrusions 35a and 35b. It is formed so as to abut the inner peripheral surface 31a.

According to the above configuration, in the electric connection box 1 according to the present embodiment, for example, when the electric wire bundle Wmin having the minimum outer diameter comes into contact with the two protrusions 35a and 35b of the positioning portion 35, the two protrusions 35a and 35b Since it abuts on the inner peripheral surface 31a that connects the wires, the position of the wire bundle Wmin passing through the wire through hole 31 in the circumferential direction can be suppressed in a state where the wire bundle Wmin is bound together with the protruding portion 33 by the binding member 41. Can be done.

Further, in the electric connection box 1 according to the present embodiment, the two protrusions 35a and 35b are formed in a triangular shape in the extending direction, respectively. Therefore, for example, the electric wire bundle Wmin is formed on the two protrusions 35a and 35b. At the time of contact, the inclined surfaces of the two protrusions 35a and 35b facing each other in the circumferential direction can support the electric wire bundle Wmin from different directions, so that the movement of the electric wire bundle Wmin in the circumferential direction is easily regulated. It becomes possible.

Further, the electric connection box 1 according to the present embodiment has a protruding portion 33 in the positioning portion 35, in which the portions where the two protruding portions 35a and 35b are formed project to the outside of the housing 2 along the extending direction. Therefore, for example, the electric wire bundle Wmin that is sandwiched between the two protrusions 35a and 35b can be bound together with the protrusion 33 by the binding member 41 and fixed to the frame 3 side. As a result, the electric wire bundle W passing through the electric wire through hole 31 can be reliably fixed.

Further, the wire harness WH according to the present embodiment includes an electric connection box 1, an electric wire bundle W, and a binding member 41, and two protrusions 35a and 35b are formed in the positioning portion 35 of the electric connection box 1. It has a protruding portion 33 that projects outward from the housing 2 along the extending direction. The binding member 41 binds the electric wire bundle W together with the protrusion 33. As a result, it is possible to suppress the positional deviation of the electric wire bundle W passing through the electric wire through hole 31 in the circumferential direction, and it is possible to securely fix the electric wire bundle W to the housing 2.

In the electric connection box 1 and the wire harness WH according to the above embodiment, the electric wire through hole 31 is formed by combining the frame 3 and the lower cover 7 as shown in FIGS. 2 and 3. It is not limited to, and may be formed on either the frame 3 or the lower cover 7.

Further, in the electric connection box 1 and the wire harness WH according to the above embodiment, the two protrusions 35a and 35b have a triangular cross section in the extending direction, but the cross section is not limited to this and the cross section is a base. It may be formed in a shape.

1 Electrical junction box 2 Housing 2a, 3a Internal space 3 Frame 4 Electronic components 5 Upper cover 7 Lower cover 30 Wire threading part 31 Wire threading hole 31a Inner peripheral surface 33 Projecting part 35 Positioning part 35a, 35b Protruding part 41 Bundling member W, Wmax, Wmin Wire bundle WH Wire harness

Claims (4)

A housing that accommodates at least one electronic component in the interior space,
The hole through the wire the formed in a wall of the casing, and passing the wire bundle that is electrically connected one by bundling a plurality of wires that are in the electronic component,
With
The wire through hole is
It has a positioning unit that positions one of the wire bundles, and has a positioning unit.
The positioning unit is
It has two protrusions extending in the extending direction of the one wire bundle and protruding inward from the inner peripheral surface.
The two protrusions have an inner circumference that connects the two protrusions when one wire bundle having the smallest outer diameter abuts on the two protrusions. When one wire bundle having the maximum outer diameter is in contact with two protrusions, the electric wire bundle is formed so as to be in contact with the surface without contacting the inner peripheral surface .
An electrical junction box that features that. The protrusion has a triangular cross section in the extending direction.
The electrical junction box according to claim 1. In the positioning portion, a portion where the two protrusions are formed protrudes to the outside of the housing along the extending direction.
The electrical junction box according to claim 1 or 2. A housing for accommodating at least one electronic component in the internal space, wherein provided on the wall surface of the housing, and through a wire bundle that is electrically connected one by bundling a plurality of wires that are in the electronic component wire An electrical junction box with through holes,
With one of the above-mentioned electric wire bundles
A binding member that binds one wire bundle together with a part of the electrical junction box,
With
The wire through hole is
It has a positioning unit that positions one of the wire bundles, and has a positioning unit.
The positioning unit is
It has two protrusions extending in the extending direction of the one wire bundle and protruding inward from the inner peripheral surface.
The two protrusions have an inner circumference that connects the two protrusions when one wire bundle having the smallest outer diameter abuts on the two protrusions. When one wire bundle having the maximum outer diameter is in contact with the two protrusions, the electric wire bundle is formed so as to be in contact with the surface without contacting the inner peripheral surface.
The positioning portion further has two protrusions formed thereof and protrusions protruding outward of the housing along the extending direction.
The binding member binds one wire bundle together with the protrusion.
A wire harness that features that.

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