JP6953261B2 - Electrical junction box and wire harness - Google Patents

Description

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

Conventionally, an electric junction box (junction box, fuse box, relay box) that is mounted on a vehicle such as an automobile and houses electronic parts such as fuses and relays and wire harnesses that are electrically connected to the electronic parts inside. Etc.) are known.

A conventional electric junction box is composed of, for example, an electric junction box main body, a lower cover, and an upper cover (see, for example, Patent Document 1). The main body of the electrical junction box houses the above-mentioned electronic components and wire harness. The lower cover is a resin lid that closes the opening provided at the lower end of the main body of the electrical junction box. The upper cover is a resin lid that closes the opening provided at the upper end of the main body of the electrical junction box.

Japanese Unexamined Patent Publication No. 2016-208561

In the conventional electric junction box, for example, as a work in the assembly process, it is necessary to attach the upper cover to the electric junction box main body to which the lower cover is assembled. Therefore, the upper cover and the electric junction box main body are fitted together. Compatibility is required.

An object of the present invention is to provide an electric junction box and a wire harness capable of suppressing bending of a lid and improving fitability.

In order to achieve the above object, the electric junction box according to the present invention includes a housing space portion for accommodating at least one electronic component, a housing having an opening for communicating the outside and the accommodation space portion, and an external force. It is provided with a lid that can be elastically deformed by the above and closes the opening from the attachment / detachment direction of the housing, and the lid is formed from the top plate portion and the outer periphery of the top plate portion to the housing. It is composed of a side side portion that stands upright and abuts on the outer periphery of the de-direction side end portion of the housing, and the side side portions are located at positions facing each other and are located on the outer periphery of the housing. It has a set of locking side portions provided with a locking portion to be locked to the formed locked portion, and faces the opposite direction of the pair of the locking side portions in a direction intersecting with each other. It is characterized in that the plate thickness of at least one side side portion of the set of side side portions is at least thicker than the plate thickness of the locking side portion.

In order to achieve the above object, the wire harness according to the present invention includes the above-mentioned electric junction box, at least one electronic component housed in the electric junction box, and at least one electrically connected to the electronic component. It is characterized by being provided with a book wiring material.

According to the electric junction box and the wire harness according to the present invention, there is an effect that the bending of the lid body can be suppressed and the fitability can be improved.

FIG. 1 is a perspective view showing a schematic configuration of an electrical junction box according to the first embodiment. FIG. 2 is an exploded perspective view showing a schematic configuration of the electrical junction box according to the first embodiment. FIG. 3 is a plan view of the upper cover constituting the electrical connection box according to the first embodiment. FIG. 4 is a partial cross-sectional view of the electrical junction box according to the first embodiment. FIG. 5 is a partial cross-sectional view of the electrical junction box according to the first embodiment. FIG. 6 is a perspective view showing a schematic configuration of the electrical junction box according to the second embodiment. FIG. 7 is an enlarged perspective view of a main part showing a schematic configuration of the electrical junction box according to the second embodiment. FIG. 8 is an enlarged perspective view of a main part showing a schematic configuration of the electrical junction box according to the second embodiment. FIG. 9 is a partial cross-sectional perspective view of the electrical junction box according to the second embodiment.

Hereinafter, embodiments of the electrical junction box and 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 assumed by those skilled in the art or those that are substantially the same. In addition, the components in the following embodiments can be omitted, replaced, or changed in various ways without departing from the gist of the invention.

[First Embodiment]
FIG. 1 is a perspective view showing a schematic configuration of an electrical junction box according to the first embodiment. FIG. 2 is an exploded perspective view showing a schematic configuration of the electrical junction box according to the first embodiment. FIG. 3 is a plan view of the upper cover constituting the electrical connection box according to the first embodiment. FIG. 4 is a partial cross-sectional view of a main part of the electrical junction box according to the first embodiment. FIG. 5 is a partial cross-sectional view of a main part of the electrical junction box according to the first embodiment. Note that FIG. 3 is a front view of the opening of the upper cover. FIG. 4 is a partial cross-sectional view taken along the line AA of FIG. 1, which is a partially enlarged view of a cross section of the upper cover and the main body of the electrical junction box. FIG. 5 is a partially enlarged view of a cross section of the upper cover and the main body of the electrical junction box. Further, in the following description, the X direction, the Y direction, and the Z direction shown in the drawing are orthogonal (intersect) with each other. For example, when the electrical junction box is mounted on a vehicle and the vehicle is located on a horizontal plane, the X direction is called the "width direction", the Y direction is called the "depth direction", and the Z direction is called the "vertical direction". Typically, the width and depth directions are along the horizontal direction, and the vertical direction is along the vertical direction. Further, here, the width direction corresponds to the "attachment / detachment direction" of the upper cover with respect to the housing, and the X1 direction is the de-direction and the X2 direction is the arrival direction. The depth direction corresponds to the "short side direction" of the upper cover. The vertical direction corresponds to the "long side direction" of the upper cover. Unless otherwise specified, each direction used in the following description will be described as a direction in which the parts are assembled to each other and the electric junction box is mounted on the vehicle.

The electric connection box 1 according to the present embodiment shown in FIGS. 1 and 2 is mounted on a vehicle such as an automobile and incorporated into a wire harness WH. In the wire harness WH, for example, for connection between each device mounted on a vehicle, a plurality of wiring materials W used for power supply and signal communication are bundled to form an aggregate part, and a plurality of wirings are arranged by a connector or the like. The material W is connected to each device. The wire harness WH includes a conductive wiring material W and an electrical connection box 1 that is electrically connected to the wiring material W. The wiring material W is composed of, for example, a metal rod, an electric wire, a bundle of electric wires, and the like. The metal rod is formed by covering the outside of a conductive rod-shaped member with an insulating coating. An electric wire is formed by covering the outside of a conductor portion (core wire) composed of a plurality of conductive metal strands with an insulating coating portion. The electric wire bundle is a bundle of the electric wires. In the wire harness WH, a plurality of wiring materials W are bundled and aggregated, and the electrical connection box 1 is electrically connected via terminals, connectors, or the like provided at the terminals of the bundled wiring materials W. The wire harness WH may also include a grommet, a protector, a fixture, and the like.

The electrical junction box 1 is a collection of electronic components 6 such as connectors, fuses, relays, capacitors, branch parts, and electronic control units, and is housed therein. The electric junction box 1 is installed in, for example, the engine room or the vehicle interior of the vehicle. The electric junction box 1 is connected between a power source such as a battery and various electronic devices mounted in the vehicle via a wiring material W or the like. The electric junction box 1 distributes the electric power supplied from the power source to various electronic devices mounted in the vehicle. The electrical junction 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 electrical junction box. Hereinafter, the configuration of the electrical junction box 1 will be described in detail with reference to each figure.

As shown in FIGS. 1 and 2, the electrical connection box 1 of the present embodiment includes a housing 2 and an upper cover 3. Each part constituting the electric junction box 1 is molded of, for example, an insulating synthetic resin. The electrical connection box 1 is formed in a box shape by combining the housing 2 and the upper cover 3.

The housing 2 accommodates one or more electronic components 6. The housing 2 is formed in a box shape by an insulating synthetic resin, and mainly has a storage space portion 7 and an opening portion 41. The accommodation space 7 accommodates one or more electronic components 6. The accommodation space portion 7 in the present embodiment is divided into, for example, two blocks, but the present invention is not limited to this. The opening 41 communicates the outside of the electrical connection box 1 with the accommodation space 7.

The housing 2 includes an electrical connection box main body 4 and a lower cover 5. The electrical junction box body 4 mainly forms a storage space 7 and an opening 41. In the electric junction box main body 4, a hollow accommodation space portion 7 is formed by a main body side wall portion 4a having a polygonal tubular shape (including a substantially rectangular tubular shape; the same applies hereinafter). In the electric junction box main body 4, openings 41 are formed at both ends of the main body side wall portion 4a in the attachment / detachment direction. The lower cover 5 is a lid that closes the opening 41 on the landing direction side in the attachment / detachment direction. The lower cover 5 is formed in a hollow shape by a polygonal cylindrical side wall portion 5a and an inner bottom portion 5b facing the opening 41 on the landing direction side of the electric junction box main body 4. The lower cover 5 is locked to the electric junction box main body 4 by a plurality of locking portions 52 in a state where the opening 51 is opposed to the opening 41 on the landing direction side in the attachment / detachment direction. The electrical junction box main body 4 and the lower cover 5 form an insertion hole 43 in a state of being assembled to each other. The insertion hole 43 is a portion through which the wiring material W assembled in the electric connection box main body 4 is inserted.

The upper cover 3 is a lid that closes the opening 41 on the de-direction side of the main body 4 of the electrical connection box. When the upper cover 3 is assembled to the electric connection box main body 4, a plurality of locks of the upper cover 3 are locked with the opening 33 facing the opening 41 of the electric connection box main body 4 in the attachment / detachment direction. It is locked to the locked portion 42 of the electric junction box main body 4 by the portion 34. The upper cover 3 is formed in a tray shape by an insulating synthetic resin that can be elastically deformed by an external force. This external force includes, for example, an operating force of an operator or the like when attaching / detaching the upper cover 3 to / from the housing 2. The upper cover 3 is formed by a top plate portion 31 which is flat and has a polygonal shape based on a rectangle having the same shape as the opening 41, a polygonal cylindrical side side portion 32, and a side side portion 32. It is configured to include an opening 33 to be formed.

The side side portion 32 is erected from the outer periphery of the top plate portion 31 toward the housing 2 side, and abuts on the outer periphery of the de-direction side end portion of the housing 2. As shown in FIG. 3, the side side portion 32 is composed of a plurality of small side side portions 32a, 32b, 32c, 32d, 32e, 32f divided for each side of the polygon. The small side portions 32a to 32f are formed in a straight line (or substantially a straight line) and are connected to each other. The side side portion 32 in the present embodiment has one or a plurality of locking portions 34 on each of a set of small side side portions 32b and 32e located at positions facing each other among the plurality of small side side portions 32a to 32f. It is provided. On the other hand, the locking portion 34 is not provided on the pair of small side portions 32a, 32c facing the opposite direction of the pair of small side portions 32b, 32e. Hereinafter, the small side portions 32b and 32e provided with the locking portion 34 are also referred to as locking side portions. Each locking portion 34 locks each locked portion 42 formed on the outer periphery of the housing 2. Two locking portions 34 are provided along the Z direction (vertical direction) of the small side side portion 32b, and one is provided along the Z direction of the small side side portion 32e.

As shown in FIGS. 1 and 2, the side side portion 32 has a stepped shape over the entire circumferential direction. Each small side side portion 32a to 32f is composed of each outer small side side portion 32a1 to 32f1 and each inner small side side portion 32a2 to 32f2. For example, the small side portion 32a shown in FIG. 4 is composed of an outer small side side portion 32a1 and an inner small side portion 32a2. The small side side portion 32b shown in FIG. 5 is composed of an outer small side side portion 32b1 and an inner small side side portion 32b2, and the small side side portion 32e has an outer small side side portion 32e1 and an inner small side portion 32e. It is composed of 32e2. The outer small side side portions 32a1 to 32f1 are portions that come into contact with the outer periphery of the de-direction side end portion of the housing 2. The inner small side side portions 32a2 to 32f2 are portions connecting the outer small side side portions 32a1 to 32f1 and the top plate portion 31. In the side side portion 32 in the present embodiment, of the set of small side side portions 32a, 32c, the plate thickness a1 of one of the small side side portions 32a is the locking side side portion 32b, 32e. It is thicker than the plate thickness b1 of. The plate thickness a1 in the present embodiment is the thickness of the outer small side side portion 32a1 in the Z direction (vertical direction), and the plate thickness b1 is the thickness of the outer small side side portions 32b1, 32e1 in the Y direction (depth direction). be.

Next, the procedure for assembling the electrical connection box 1 and the wire harness WH according to the present embodiment will be described. The procedure for assembling the electric connection box 1 and the wire harness WH is not limited to the one described below, and the electric connection box 1 and the wire harness WH shown in FIG. 1 may be configured after assembly. Each procedure shown in is may be changed back and forth as appropriate.

First, the operator assembles the wiring material W to each of the sub-blocks (not shown) accommodated in the accommodating space 7 of the electric junction box main body 4 to produce a sub-harness. Next, the operator inserts the sub-block together with the sub-harness into the accommodation space 7 from the landing direction side of the electric junction box main body 4, and fits and fixes the sub-block with the electric junction box main body 4. Next, the operator wraps a binding band (not shown) around the bundle of the sub-harness to bind the sub-harness, and winds a tape (not shown) so as to cover the binding band to tie the wiring material W together. At this time, the wiring material W is located in the insertion hole 43 of the electric connection box main body 4. Next, the operator mounts the electronic component 6 on each sub-block from the de-direction side of the electrical connection box main body 4, and electrically connects the electronic component 6 and the wiring material W. Next, the operator positions the lower cover 5 on the landing direction side of the electrical junction box main body 4, and inserts the lower cover 5 into the electrical junction box main body 4 from the landing direction side to the de-direction side. At this time, the insertion hole 43 is formed by the electric connection box main body 4 and the lower cover 5, and the wiring material W is inserted into the insertion hole 43. Next, the operator positions the upper cover 3 on the de-direction side of the electric junction box main body 4, attaches the upper cover 3 to the electric junction box main body 4 from the de-direction side to the arrival direction side, and electrically. Complete the assembly of the junction box 1 and the wire harness WH.

As described above, in the electrical connection box 1 according to the present embodiment, the side side portions 32 of the upper cover 3 are located at positions facing each other, and a set of small side portions 32b provided with the locking portions 34. , 32e. As a result, when the upper cover 3 is attached to the housing 2, for example, an operator or the like manually sets each of the locking portions 34 of one of the small side portions 32b to each of the locked portions 42 on the housing 2 side. The locking portion 34 of the other small side portion 32e can be locked to the other locked portion 42 while being locked to the other. Further, the electrical connection box 1 according to the present embodiment has one small side of a set of small side portions 32a, 32c facing in a direction intersecting the opposite direction of the set of small side sides 32b, 32e. The plate thickness a1 of the side portion 32a is thicker than the plate thickness b1 of the small side portions 32b and 32e. As a result, for example, when the upper cover 3 is attached to the housing 2, the bending of the upper cover 3 in the X direction (depth direction) due to the operating force of an operator or the like is suppressed, and the upper cover 3 and the housing 2 are brought into contact with each other. The fitability can be improved. Specifically, for example, when the upper cover 3 bends in the direction of the arrow in FIG. 3, the landing-direction side ends of the set of small side sides 32b and 32e become the de-direction side ends of the main body side wall 4a. It is possible to prevent the locking portion 34 from being difficult to lock with the locked portion 42 due to the contact.

Further, the wire harness WH according to the present embodiment includes an electric connection box 1, at least one electronic component 6 housed in the electric connection box 1, and at least one wiring electrically connected to the electronic component 6. It is provided with a material W. This makes it possible to obtain the same effect as that of the electrical connection box 1.

In the first embodiment, the housing 2 is composed of the electrical connection box main body 4 and the lower cover 5 as separate bodies, but the present invention is not limited to this, and the housing 2 may be integrally formed. ..

Further, in the first embodiment, the side side portion 32 is a small side in which the plate thickness a1 of one of the small side side portions 32a is the locking side side portion of the set of small side side portions 32a and 32c. Although the configuration in which the side portions 32b and 32e are thicker than the plate thickness b1 has been described, the present invention is not limited to this. For example, the plate thickness a1 of the other small side portion 32c may be thicker than the plate thickness b1, or both the plate thicknesses a1 of the small side portions 32a and 32c may be thicker than the plate thickness b1. ..

Further, the side side portion 32 has described a configuration in which the plate thickness a1 of the small side side portion 32a is thicker than the plate thickness b1 of the small side side portions 32b and 32e, but the present invention is not limited thereto. .. For example, the plate thickness a1 of the small side side portion 32a is thicker than each plate thickness b1 of the small side side portions 32b to 32f excluding the small side side portion 32a among the plurality of small side side portions 32a to 32f. It may have a configuration that is present.

Further, the side side portion 32 has described a configuration in which the plate thickness a1 of the small side side portion 32a is thicker than the plate thickness b1 of the small side side portions 32b and 32e, but the present invention is not limited thereto. .. For example, the plate thicknesses a1 and a2 of the small side side portions 32a may be thicker than the plate thicknesses b1 and b2 of the small side side portions 32b and 32e. Here, the plate thickness a2 of the small side side portion 32a is the thickness of the inner small side portion 32a2 in the Z direction, and the plate thickness b2 of the small side side portions 32b and 32e is the thickness of the inner small side portion 32b2. The plate thickness b2 is 32e2. The plate thickness a1 and the plate thickness a2 are preferably a1 ≧ a2, but are not limited thereto.

Further, as shown in FIG. 4, the side side portion 32 has been described in the case where the outer small side side portion 32a1 is formed in a flat plate shape and has a constant plate thickness a1, but the present invention is not limited to this, and the outer side portion 32 is not limited to this. The small side side portion 32a1 may be formed in a tapered shape so that the thickness increases from the X1 direction to the X2 direction. In this case, the plate thickness a1 to be compared with the plate thickness b1 is preferably the minimum value in, for example, the outer small side side portion 32a1.

Further, the side side portion 32 is a set of small side portions 32a, 32c having a plate thickness a1, and when one length is long and the other length is short, the shorter length is smaller. The plate thickness a1 of the side side portion may be made thicker than the plate thickness b1.

Further, the side side portion 32 has a stepped shape over the entire circumferential direction, but the present invention is not limited to this, and the side side portion 32 may not have a stepped shape.

[Second Embodiment]
FIG. 6 is a perspective view showing a schematic configuration of the electrical junction box according to the second embodiment. FIG. 7 is an enlarged perspective view of a main part showing a schematic configuration of the electrical junction box according to the second embodiment. FIG. 8 is an enlarged perspective view of a main part showing a schematic configuration of the electrical junction box according to the second embodiment. FIG. 9 is a partial cross-sectional perspective view of the electrical junction box according to the second embodiment. Note that FIG. 6 is a view of the electrical connection box 1 of FIG. 1 as viewed from the Z direction. FIG. 7 is a partially enlarged view of the inner wall surface of the electrical connection box main body 4 of FIG. FIG. 8 is a partially enlarged view of an electric wire clamped to the inner wall surface of FIG. 7. FIG. 9 shows a partial cross section of the insertion hole in the electrical connection box 1.

The electric connection box 1 according to the second embodiment has a clamp 60 to be inserted into a through hole 45 provided in the inner wall surface 44 of the electric connection box main body 4, and the clamp 60 is laid out from the insertion hole 43 to the outside. The wiring material W is fixed.

The electric junction box main body 4 has a through hole 45 in the inner wall surface 44 connected to the first half-cylinder portion 43a forming a part of the insertion hole 43. The through hole 45 is formed in an elliptical shape, for example, as shown in FIG. 7, but is not limited thereto. The through hole 45 fixes the clamp 60 to the inner wall surface 44. The clamp 60 is a fixing member made of resin, and fixes the wiring material W from the outer circumference with a band portion 60a formed in an annular shape. The insertion hole 43 is composed of a first half-cylinder portion 43a provided in the electrical connection box main body 4 and a second half-cylinder portion 43b provided in the lower cover 5, and the lower cover 5 is attached to the electric junction box main body 4. In this state, it forms a through hole through which the wiring material W is inserted.

Next, the procedure for assembling the electrical connection box 1 and the wire harness WH according to the present embodiment will be described. It should be noted that only the points different from the contents described in the first embodiment will be described.

The operator inserts a sub-block (not shown) to be accommodated in the accommodation space 7 of the electric junction box main body 4 into the accommodation space 7, fits and fixes the sub-block (not shown) with the electrical junction box main body 4, and then fixes the through hole 45. The clamp 60 is inserted into and fixed to the sub-harness, and the bundle of the sub-harness is bound by wrapping a binding band, or the tape is wound around the binding material W to tie the cording material W together. Next, after fixing the wiring material W with the clamp 60, the electronic component 6 is mounted on the sub-block, and the electronic component 6 and the wiring material W are electrically connected. Next, the operator attaches the lower cover 5 to the electric junction box main body 4. At this time, the insertion hole 43 is formed by the electric connection box main body 4 and the lower cover 5, and the wiring material W is inserted into the insertion hole 43.

As described above, the electric connection box 1 according to the present embodiment has a clamp 60 that is inserted into a through hole 45 provided in the inner wall surface 44 of the electric connection box main body 4, and the clamp 60 is external from the insertion hole 43. The distribution material W to be distributed to is fixed. Since the wiring material W is fixed to the electric connection box main body 4, when the lower cover 5 is attached to the electric connection box main body 4, it is possible to prevent the wiring material W from being pinched or dropped, and the electric connection box can be prevented from being pinched or dropped. The assembly workability of 1 can be improved. Further, although the through hole 45 is provided in the electric connection box main body 4, the hole is closed by inserting the clamp 60 into the through hole 45, and it is possible to suppress the intrusion of water into the electric connection box 1. It becomes.

1 Electrical junction box 2 Housing 3 Upper cover 4 Electrical junction box body 4a Main body side wall 5 Lower cover 5a Side wall 5b Inner bottom 6 Electronic components 7 Storage space 31 Top plate 32 Side side 32a, 32b, 32c, 32d, 32e, 32f Small side side 32a1, 32b1, 32e1, 32f1 Outer small side 32a2, 32b2, 32e2, 32f2 Inner small side 33 Opening 34 Locking part 41 Opening 42 Locked part 43 Insertion hole 44 Inner wall surface 45 Through hole 51 Opening 52 Locking part WH Wire harness W Wiring material

Claims (2)

A housing space for accommodating at least one electronic component, and a housing having an opening for communicating the outside with the storage space.
A lid that can be elastically deformed by an external force and that closes the opening from the attachment / detachment direction of the housing.
With
The lid is
Top plate and
A side portion that is erected from the outer circumference of the top plate portion toward the housing and that abuts on the outer circumference of the de-direction side end portion of the housing.
Consists of
The side part
It has a set of locking side edges that are located opposite each other and are provided with locking portions that are locked to the locked portions formed on the outer periphery of the housing.
Of the set of side sides facing each other in the direction intersecting the opposite direction of the locking side, the plate thickness of at least one side is equal to at least the thickness of the locking side. It's getting thicker
An electrical junction box that features that. The electrical junction box according to claim 1 and
With at least one electronic component housed in the electrical junction box,
With at least one wiring material electrically connected to the electronic component,
A wire harness characterized by being provided with.

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