JP7112980B2 - electric junction box - Google Patents

Description

The present invention relates to, for example, an electric connection box having a harness fixing portion for fixing a wire harness.

The electric connection box, which is electrically connected to the electric equipment installed in the vehicle via a wire harness, is used in narrow spaces inside and outside the vehicle, such as the driver's seat side of the instrument panel and deep inside the engine compartment. may be placed in

Therefore, in order to prevent the wire harness connected to the electrical junction box from interfering with other members and detaching from the electrical junction box, the wire harness is fixed to the electrical junction box. be.

For example, in the electrical connection box disclosed in Patent Document 1, a wire harness is fitted into a groove formed in the bottom surface of a housing body, and the wire harness is routed from the outer peripheral side surface so as to sandwich the housing body. It is supposed that the wire harness can be supported and fixed by fixing the wire harness to the harness fixing portion protruding along the .

However, in the electrical connection box disclosed in Patent Document 1, there is a risk that the harness fixing portion may crack or bend when an external force acting outward on the outer peripheral surface acts on the wire harness. . As a result, the wire harness may come off from the housing body or interfere with other members.

JP 2012-125117 A

SUMMARY OF THE INVENTION An object of the present invention is to provide an electric connection box capable of improving the strength of a harness fixing portion for fixing a wire harness.

The present invention is an electrical connection box in which a harness fixing portion for fixing a wire harness is provided in a housing body, and the harness fixing portion extends from the outer peripheral surface of the housing body toward the outside of the housing body. It is composed of a harness fixing surface that extends and fixes the wire harness, and a wall part that stands up from the harness fixing surface, and the wall part becomes distant from each other as it goes in the extending direction of the harness fixing surface. and a pair of outer wall portions extending from the outer peripheral surface in the extending direction and connected to the inner wall portions.

The inner wall portion and the outer wall portion may be configured such that a pair of the outer wall portions are parallel to each other and the pair of inner wall portions intersect the outer wall portion, or the inner wall portion and the outer wall portion are Including the case where they are configured to be inclined with respect to each other.
The pair of inner wall portions may be arranged such that the inner end portions are spaced apart from each other by a predetermined distance, the inner end portions are in contact with each other, or the inner wall portions intersect with each other. include.

The wall portion includes a case where the wall portion is erected from the outer peripheral edge of the harness fixing surface and a case where the wall portion is erected from the inner side of the outer peripheral edge. Including when standing.

In addition, when the wall portion is erected on the main surface of the harness fixing surface on which the wire harness is fixed, or when the wall portion is erected on both main surfaces of the harness fixing surface. In this case, the inner end portions of the inner wall portion may be arranged with a predetermined interval between them, and the wire harness may be inserted therebetween.

According to this invention, the strength of the harness fixing portion that fixes the wire harness can be improved.
More specifically, a wall portion is provided to stand against the harness fixing surface, and the pair of outer wall portions extending from the outer peripheral surface and the inner wall portion are in contact with each other. Since a plurality of cylindrical bodies each having a substantially triangular prism shape can be formed by the inner wall portion and the outer wall portion, the strength of the harness fixing portion can be improved.

Further, since the ends of the pair of inner wall portions in the extending direction are configured to be separated from each other, the inner wall portion is not arranged in the extending direction of the harness fixing portion, so that the harness A work space for fixing the wire harness to the fixing portion can be secured.

As a mode of this invention, the ends of the pair of inner wall portions opposite to each other in the extending direction may be spaced apart from each other by a predetermined distance and connected to the housing body.
According to this invention, since a space can be formed between the ends of the inner wall portion on the opposite side in the extending direction, a work space for fixing the wire harness to the harness fixing portion can be ensured. Therefore, it is possible to improve the working efficiency of fixing work for fixing the wire harness to the harness fixing portion.

Further, as an aspect of the present invention, the direction in which the outer wall portion is erected from the harness fixing surface is defined as the erecting direction, and the outer peripheral surface A protruding portion protruding in the extending direction from is provided, and the protruding portion is connected to the end portion of the harness fixing surface opposite to the extending direction, and is connected to the inner wall portion in the extending direction. It may be connected to the opposite end.

According to the present invention, since the distance from the projecting portion to the outer end of the harness fixing surface can be made shorter than the distance from the outer peripheral surface to the outer end of the harness fixing surface, the strength of the harness fixing portion can be increased. can be improved. Further, since the inner end portion of the inner wall portion is in contact with the outer peripheral surface on the erecting direction side of the projecting portion, the harness is fixed by the inner wall portion, the outer wall portion, and the outer peripheral surface. Since a triangular prism-shaped rib can be formed in the inner eye part of the part, the strength of the harness fixing part against external force acting on the harness fixing part in the erecting direction or the opposite side of the erecting direction is improved. can be made

As a result, for example, in order to fix the wire harness to the harness fixing portion, even when an external force acts on the harness fixing portion in a direction to press the wire harness, the harness fixing portion is not damaged. can be prevented.

Further, as a mode of the present invention, a concave portion recessed in the erecting direction side is formed in the end surface of the projecting portion opposite to the erecting direction side, and the recessed portion is reinforced along the extending direction. Ribs may be provided.

According to this invention, it is possible to reduce the weight while maintaining the strength of the protrusion. That is, it is possible to reliably reinforce the harness fixing portion connected to the protruding portion and to reduce the weight of the electrical connection box.
In addition, one reinforcing rib may be provided in the center of the concave portion along the wiring direction, or a plurality of reinforcing ribs may be provided in the concave portion along the wiring direction.

Further, as a mode of the present invention, the harness fixing surface may be inclined toward the direction in which the wall portion is erected as it goes in the extending direction.
The end surface of the outer wall portion may be configured to be parallel to an orthogonal plane perpendicular to the erecting direction erected from the harness fixing surface, or may be configured to intersect the orthogonal plane. including cases where

According to the present invention, the strength of the harness fixing portion can be further improved, and the work of attaching the wire harness routed so as to be inclined along the harness fixing portion can be performed more efficiently.

For example, when the harness fixing surface is inclined with respect to the outer peripheral surface, the space for fixing the wire harness to the harness fixing portion becomes narrow, making it difficult to attach the wire harness. On the other hand, if the harness fixing surface is elongated outward, the harness fixing portion may be damaged by an external force.

In contrast, the present invention provides a pair of inner wall portions that are separated from each other as the wall portions extend toward the outside of the housing body, and extend from the outer peripheral surface in the extending direction, and Since it is composed of a pair of outer wall portions that abut on the ends of the portion in the extending direction, the strength of the harness fixing portion can be improved.

Therefore, the harness fixing surface can be elongated along the extension direction, and a work space for fixing the wire harness can be reliably secured. Therefore, the wire harness can be routed in a desired direction while being securely fixed to the harness fixing portion.

Further, when the outer wall portion is erected from the harness fixing surface so as to be perpendicular to the outer peripheral surface, the harness fixing portion is made most compact, and the inside of the outer wall portion and the inner wall portion is The contact area between the end of and the outer peripheral surface can be the maximum value. That is, it is possible to achieve compactness while improving the strength of the harness fixing portion.

Further, as a mode of the present invention, the outer wall portions may be configured in parallel with each other.
According to the present invention, since the outer wall portion is configured linearly along the wiring direction, stress can be prevented from concentrating on the contact portion between the outer wall portion and the inner wall portion, and the harness fixing portion can be It can reduce the risk of damage.

Further, since a space can be secured outside the outer wall portion extending from the outer peripheral surface, the size of the electric connection box can be reduced. In particular, it is possible to prevent the electrical junction box from interfering with other members in a narrow space where the electrical junction box is often arranged, so that the installation work of the electrical junction box can be performed more efficiently. be able to.

Further, as an aspect of the present invention, a direction in which the wall portion is erected from the harness fixing surface may be defined as an erection direction, and end surfaces of the inner wall portion and the outer wall portion in the erection direction may be formed flush with each other. .
According to this aspect of the invention, since there is no step between the outer wall and the inner wall, concentration of stress can be prevented, and damage to the wall can be prevented more reliably.

Further, as an aspect of the present invention, the harness fixing surface is formed with an insertion hole that is inserted along the plate thickness direction, and the contact portion between the inner wall portion and the outer wall portion extends beyond the insertion hole. It may be arranged on the opposite side of the direction.
According to the present invention, it is possible to reliably secure a space for inserting a clamp for fixing the wire harness through the insertion hole.

Further, as an aspect of the present invention, the wall portion has an outer end wall portion that stands from an outer end portion of the harness fixing surface and is connected to an outer end portion of the outer wall portion or the inner wall portion. good too.
According to the present invention, the outer end wall portion, the outer peripheral surface, and the outer wall portion or the inner wall portion form a rectangular rib, and the wall portion is provided with the inner wall portion, thereby The inner side of the harness fixing surface can be reinforced, and the strength of the harness fixing portion can be further improved.

According to the present invention, it is possible to provide an electric connection box capable of improving the strength of the harness fixing portion that fixes the wire harness.

FIG. 2 is a schematic perspective view of the electrical connection box to which the wire harness is attached, viewed from below. FIG. 2 is a schematic perspective view of the electrical junction box as viewed from above; The top view of an electric junction box. Sectional drawing of the harness fixing|fixed part in an electric junction box. Sectional drawing of the harness fixing|fixed part in an electric junction box. Sectional drawing of the harness fixing|fixed part of the state which fixed the wire harness bundle|flux.

One embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 shows a schematic perspective view of the electrical junction box 1 installed in the vehicle body, FIG. 2 shows a schematic perspective view of the electrical junction box 1 as viewed from above, and FIG. 4 and 5 show cross-sectional views of the distal end harness fixing portion 30. FIG.

Here, the vertical direction in FIG. 2 is defined as the vertical direction H, the upward direction is the +H side, and the downward direction is the -H side. In addition, the longitudinal direction of the electric connection box 1 is perpendicular to the vertical direction H, and the longitudinal direction L is the longitudinal direction. Along the longitudinal direction L in FIG. end side). A direction orthogonal to the vertical direction H and the longitudinal direction L is defined as a width direction W, the right side along the width direction W in FIG. 2 is the +W side, and the left side is the -W side.

That is, FIG. 2 shows a schematic perspective view of the electrical junction box 1 viewed from above (+H side), +L side, and -W side. 1 shows a schematic perspective view of the electrical connection box 1 viewed from below (-H side), +L side, and -W side.

2 to 5, FIG. 2(a) shows an overall schematic perspective view of the electric connection box 1, FIG. 2(b) shows an enlarged perspective view of the front end side harness fixing portion 30, and FIG. 3(a) shows a plan view of the electrical junction box 1, and FIG. 3(b) shows an enlarged plan view of the front end harness fixing portion 30 provided in the electrical junction box 1. FIG.

4 shows a cross-sectional view taken along line AA in FIG. 3(b), and FIG. 5 shows a cross-sectional view taken along line BB in FIG. 3(b).
FIG. 6 is a cross-sectional view of the distal end side harness fixing portion 30 in a state where the wire harness bundle 100 is fixed, and shows a cross-sectional view corresponding to the cross-sectional view taken along line AA.

For example, wire harnesses 110 connected to various electric devices (not shown) mounted on a vehicle are connected to one end of each wire harness 110 via a connector 120 as shown in FIG. , are electrically connected to an electric connection box 1 containing terminals and electronic parts for coupling and branching with electric equipment.

A wire harness bundle 100 configured by bundling a plurality of wire harnesses 110 with a clamp 500 is routed along the electrical junction box 1 and attached to the electrical junction box 1 via a clamp fixing portion 510 of the clamp 500. Fixed.

The electrical connection box 1 electrically connected to the wire harness 110 is a hollow housing containing terminals, electronic components, etc. as described above. 2 , and a distal harness fixing portion 30 and a proximal harness fixing portion 40 provided on the housing body 2 .

A housing main body 2 in which terminals, electronic parts, etc. are built-in is composed of an upper cover 10 forming a top side and a lower cover 20 forming a bottom side.
The upper cover 10 is a hollow reverse concave body with an open bottom (-H side), and as shown in FIGS. A stop portion 11 is provided, and a plurality of upper connector connection openings 12 for connecting connectors (not shown) are provided on the upper surface.

The lower cover 20 is a hollow concave body configured to be higher in the vertical direction H than the upper cover 10, and has an open top. The lower cover 20 is composed of a bottom surface portion 21 forming a bottom surface and an outer peripheral surface 22 standing upward (+H side) from the outer edge portion of the bottom surface portion 21 .
The bottom surface portion 21 is provided with a plurality of lower connector connection openings 23 to which the connectors 120 can be connected (see FIG. 1).

The outer peripheral surface 22 is a boundary that separates the inside and the outside of the lower cover 20, is erected from the outer peripheral edge of the bottom surface portion 21 so as to surround the bottom surface portion 21, and has a predetermined height along the vertical direction H. . Of the outer peripheral surface 22, the surfaces formed along the longitudinal direction L are referred to as first outer peripheral surfaces 22a, 22a, and of the outer peripheral surface 22 along the width direction W, the surface formed on the +L side is the second The surface formed on the +L side is referred to as a third outer peripheral surface 22c.

Locked portions 24 capable of locking the locking portion 11 are provided on the first outer peripheral surfaces 22a, 22a.
The second outer peripheral surface 22b is provided with a locked portion 24 at the central portion in the width direction W, and a protruding portion 25 protruding to the +L side is provided at the end on the -W side. Further, at a position corresponding to the projecting portion 25, a leading end side harness fixing portion 30 extending to the +L side is provided.

As shown in FIGS. 4 and 5, the protruding portion 25 is formed such that the lower end portion on the −W side of the outer peripheral surface 22 protrudes toward the outside (+L side) of the electrical connection box 1 . That is, the outer peripheral surface 22 and the projecting portion 25 are formed in a stepped shape when viewed from the side (see FIG. 4).

A concave portion 26 is formed in the lower end surface of the projecting portion 25 (see FIG. 5) and is recessed along the vertical direction H. A rib 27 connecting with the inner surface of 25 is provided along the longitudinal direction L (see FIG. 4).

As shown in FIG. 3B, the front end harness fixing portion 30 protruding from the second outer peripheral surface 22b has a substantially rectangular shape in a plan view with an upper opening, and is a harness fixing portion for fixing the wire harness bundle 100. The surface 31, the outer wall portions 32, 32 erected at the outer end of the harness fixing surface 31 in the width direction W, the inner wall portions 33, 33 erected from the main surface of the harness fixing surface 31, and the harness fixing surface 31. It is constructed integrally with a tip wall portion 34 erected at the tip. The base ends of the outer wall portions 32 and 32 and the inner wall portions 33 and 33 are connected to the outer peripheral surface 22 .

The harness fixing surface 31 is a substantially rectangular flat plate extending upward along the longitudinal direction L toward the distal end side, and the base end thereof is connected to the projecting portion 25 . That is, the harness fixing surface 31 is inclined with respect to the outer peripheral surface 22 . Further, an insertion hole 311 is provided on the front end side of the harness fixing surface 31 so as to pass through the harness fixing surface 31 along the plate thickness direction.

The insertion hole 311 is a through hole formed on the front end side of the center of the harness fixing surface 31 in the longitudinal direction L and at the central portion of the harness fixing surface 31 in the width direction W. The wire harness bundle 100 can be fixed to the distal end side harness fixing portion 30 by inserting the clamp fixing portion 510 of the bundled clamp 500 (see FIG. 6).

The outer wall portions 32 , 32 extend upward (+H side) from both ends of the harness fixing surface 31 in the width direction W, and the upper portion of the proximal end is connected to the outer peripheral surface 22 , and the lower portion thereof is connected to the projecting portion 25 . is doing. Further, the upper end faces of the outer wall portions 32, 32 are formed along a plane perpendicular to the vertical direction H. As shown in FIG.

That is, the outer wall portions 32, 32 are configured in a substantially right-angled triangular shape in a side view such that the height with respect to the harness fixing surface 31 decreases toward the distal end side. The pair of outer wall portions 32, 32 are configured to be parallel to each other (see FIG. 4).

The inner wall portions 33 , 33 stand from the inner side of the harness fixing surface 31 in the width direction W so as to intersect the outer wall portions 32 , 32 in plan view. In other words, the inner wall portions 33, 33 are configured in a "V" shape in plan view so as to extend outward in the width direction W of the harness fixing surface 31 as they go toward the tip side (+L side) (FIG. 3). (b)).

In this way, in plan view, the base end sides of the inner wall portions 33, 33 which are formed so as to separate from each other along the longitudinal direction L toward the distal end side (+L side) extend in the width direction W of the harness fixing surface 31. positioned slightly outside the center of the That is, the inner wall portions 33, 33 are formed such that their base ends are spaced apart by a predetermined distance along the width direction W, and their distal ends are connected to the outer wall portions 32, 32 on the base end side of the center in the longitudinal direction L. ing.

In addition, the upper side of the proximal ends of the inner wall portions 33 , 33 is connected to the outer peripheral surface 22 , and the lower side (−H side) is connected to the projecting portion 25 . On the other hand, the distal end sides of the inner wall portions 33 , 33 are connected to the outer wall portion 32 on the proximal side (−L side) of the proximal end portion of the insertion hole 311 .

The tip wall portion 34 slightly protrudes upward (to the +H side) from the tip of the harness fixing surface 31 , and both ends in the width direction W are connected to the tips of the outer wall portions 32 , 32 . In addition, corners are removed so that connecting portions between the tip wall portion 34 and the outer wall portions 32, 32 are curved.

The outer wall portions 32 , 32 , the inner wall portions 33 , 33 , and the tip end wall portion 34 configured in this manner form a wall portion 35 erected from the harness fixing surface 31 . The upper end surface of the wall portion 35 is configured to be parallel to a plane perpendicular to the vertical direction H. As shown in FIG. In other words, the outer wall portions 32, 32, the inner wall portions 33, 33, and the tip wall portion 34 standing from the outer peripheral edge of the harness fixing surface 31 are formed of wall portions whose height decreases toward the tip side. there is

The third outer peripheral surface 22c and the second outer peripheral surface 22b are configured to be parallel to each other. A base end harness fixing portion 40 extending toward the -L side is provided at the lower end.

The proximal-side harness fixing portion 40 is composed of a proximal-side bottom surface 41 and a proximal-side wall portion 42 erected from the outer peripheral edge of the proximal-side bottom surface 41 .
The base-side bottom surface 41 is a flat plate formed parallel to a plane perpendicular to the vertical direction H, and has a base-side insertion through the central portion in the width direction W and the longitudinal direction L along the thickness of the plate. A hole (not shown) is provided through which the clamp fixing portion 510 of the clamp 500 that bundles the wire harnesses 110 can be inserted to fix the wire harness bundle 100 . Note that the base end harness fixing portion 40 does not have a structure corresponding to the inner wall portions 33 , 33 .

In the electrical connection box 1 configured as described above, the tip side harness fixing portion 30 for fixing the wire harness bundle 100 is provided in the housing body 2 , and the tip side harness fixing portion 30 is provided on the outer peripheral surface 22 of the housing body 2 . (Second outer peripheral surface 22b), extending along the longitudinal direction L toward the outside of the housing body 2, that is, wiring direction of the wire harness bundle 100 that is routed along the housing body 2 and a wall portion 35 erected from the harness fixing surface 31. The wall portion 35 extends from the harness fixing surface 31. From the pair of inner wall portions 33, 33 and the outer peripheral surface 22 (second outer peripheral surface 22b) toward the outer side of the longitudinal direction L (+L side) as it goes in the direction (+L side in the longitudinal direction L) The strength of the distal end side harness fixing portion 30 for fixing the wire harness bundle 100 is increased by being configured by the pair of outer wall portions 32, 32 that extend along the length of the inner wall portions 33, 33 and are connected to the outer ends of the inner wall portions 33, 33. can be improved.

More specifically, a wall portion 35 is provided upright from the harness fixing surface 31, and a pair of outer wall portions 32, 32 and inner wall portions 33, 33 extending from the outer peripheral surface 22 (second outer peripheral surface 22b) are provided. Since they are in contact with each other, the inner wall portions 33, 33 and the outer wall portions 32, 32 can form a plurality of substantially triangular prism-shaped cylindrical bodies. As a result, the strength of the tip-side harness fixing portion 30 can be improved.

In addition, since the tip side end portions of the pair of inner wall portions 33 , 33 are separated from each other, the inner wall portions 33 , 33 are not arranged on the tip side (+L side) of the tip side harness fixing portion 30 . Therefore, it is possible to secure a work space for fixing the wire harness bundle 100 to the distal end side harness fixing portion 30 .

In addition, the proximal end portions of the pair of inner wall portions 33, 33 are spaced apart from each other by a predetermined distance and connected to the housing body 2, so that the proximal end (−L side) end of the inner wall portions 33, 33 A space can be formed between the parts. As a result, a work space for fixing the wire harness bundle 100 to the tip-side harness fixing portion 30 can be reliably secured, and the work efficiency of fixing the wire harness bundle 100 to the tip-side harness fixing portion 30 can be improved. can be improved.

In addition, a protruding portion 25 that protrudes outward (+L side) in the longitudinal direction L from the outer peripheral surface 22 (second outer peripheral surface 22b) on the harness fixing surface side of the upper end surface of the outer wall portions 32, 32 in the vertical direction H. is provided, and the projecting portion 25 is connected to the proximal end portion of the harness fixing surface 31 in the longitudinal direction L, and is connected to the proximal end portion of the inner wall portions 33, 33 in the longitudinal direction L. , the distance from the outer peripheral surface 22 (second outer peripheral surface 22b) to the outer end of the harness fixing surface 31 can be shortened, and the strength of the distal end side harness fixing portion 30 can be further improved.

In addition, the outer walls 32, 32 and the inner walls 33, 33 are located on the +H side of the protrusion 25 where the lower sides of the proximal end portions of the outer walls 32, 32 and the inner walls 33, 33 are connected to the protrusion 25. Since the end side end portion can be brought into contact with the outer peripheral surface 22 (second outer peripheral surface 22b), the outer wall portions 32, 32, the inner wall portions 33, 33, the outer peripheral surface 22 (second outer peripheral surface 22b), or the projecting portion 25 Thus, a triangular prism-shaped rib can be formed on the proximal end side of the distal harness fixing portion 30 . As a result, the strength of the distal end harness fixing portion 30 against an external force acting upward (+H side) or downward (−H side) on the distal end side harness fixing portion 30 can be further improved.

Specifically, in order to fix the wire harness bundle 100 to the tip side harness fixing portion 30, even if an external force is applied so as to press the wire harness bundle 100 against the tip side harness fixing portion 30, the tip side harness is fixed. The fixing portion 30 can be prevented from being damaged, and the leading end side harness fixing portion 30 can also be prevented from being damaged by the weight of the wire harness bundle 100 fixed to the leading end side harness fixing portion 30 .
be.

Furthermore, a concave portion 26 recessed in the vertical direction H side is formed on the side opposite to the vertical direction H side of the projecting portion 25, and a rib 27 along the longitudinal direction L is provided in the concave portion 26, thereby protruding. The weight can be reduced while maintaining the strength of the portion 25, and the harness fixing surface 31 and the inner wall portions 33, 33 connected to the projecting portion 25 can be reliably reinforced.

In addition, the harness fixing surface 31 is tilted toward the direction (+H side) in which the wall portion 35 is erected with respect to the harness fixing surface 31 as it goes to the tip side (+L side). The work of attaching the wire harness bundle 100 wired so as to be inclined along the portion 30 can be performed more efficiently.

More specifically, when the harness fixing surface 31 is inclined with respect to the outer peripheral surface 22 , the space for fixing the wire harness bundle 100 to the leading end side harness fixing portion 30 is narrowed, and the wire harness bundle 100 is attached to the electrical connection box 1 . It becomes difficult to attach to the On the other hand, if the harness fixing surface 31 is lengthened toward the tip side (+L side), the strength is reduced, so that the tip side harness fixing part 30 may be damaged by the external force acting on the tip side harness fixing part 30. be.

On the other hand, the wall portion 35 is composed of a pair of inner wall portions 33, 33 that are separated from each other as it goes to the outside (front end side) of the housing body 2, and the outer peripheral surface 22 (second outer peripheral surface 22b). , and is configured with a pair of outer wall portions 32, 32 that abut on the tip side (+L side) end portions of the inner wall portions 33, 33, thereby improving the strength of the tip side harness fixing portion 30. be able to.

As a result, the harness fixing surface 31 can be lengthened along the longitudinal direction L, and a work space for fixing the wire harness bundle 100 to the front harness fixing portion 30 can be reliably secured. Therefore, the work of attaching the wire harness bundle 100 wired so as to be inclined along the tip-side harness fixing portion 30 can be performed more efficiently, and the wire harness bundle 100 can be reliably fixed to the tip-side harness fixing portion 30, and the wire can be The harness bundle 100 can be routed in a desired direction.

Further, by forming the outer wall portions 32, 32 so as to be perpendicular to the outer peripheral surface 22 (second outer peripheral surface 22b) from the outer end portion of the harness fixing surface 31, the harness fixing portion can be made most compact. In addition, the contact area between the outer peripheral surface 22 and the outer peripheral surface 22 can be maximized. That is, it is possible to improve the strength of the distal end side harness fixing portion 30 and to achieve compactness.

Further, since the outer wall portions 32, 32 are configured in parallel to each other, the outer wall portions 32, 32 are configured linearly along the longitudinal direction L, so that the outer wall portions 32, 32 and the inner wall portions 33, 33 It is possible to prevent the stress from concentrating on the contact portion of the front end harness fixing portion 30 and reduce the risk of damage to the front end harness fixing portion 30 .

Furthermore, since a space can be secured outside the width direction W of the outer wall portions 32, 32 on the outer peripheral surface 22 (second outer peripheral surface 22b), the size of the electric connection box 1 can be reduced. In particular, since the electrical connection box 1 is often arranged in a narrow space, the risk of the electrical connection box 1 interfering with other members can be reduced, and the installation work of the electrical connection box 1 can be performed efficiently.

The direction in which the wall portion 35 stands from the harness fixing surface 31 is defined as the vertical direction H, and the end surfaces of the inner wall portions 33, 33 and the outer wall portions 32, 32 are flush with each other. and the inner wall portions 33, 33, stress concentration can be prevented, and damage to the wall portion 35 can be prevented more reliably.

Furthermore, an insertion hole 311 is formed in the harness fixing surface 31 so as to be inserted along the plate thickness direction. By being arranged inside L, a space for inserting a clamp for fixing the wire harness bundle 100 into the insertion hole 311 can be reliably secured. As a result, the wire harness bundle 100 can be more reliably fixed to the distal harness fixing portion 30 .

The contact portions between the outer wall portions 32 and 32 and the inner wall portions 33 and 33 are the positions up to 1/3 of the length along the longitudinal direction L of the outer wall portions 32 and 32 and the insertion hole 311. It is preferable to be between the base end side of the central portion of the longitudinal direction L, and the position of up to 1/3 of the length along the longitudinal direction L of the outer wall portions 32 and 32 and the insertion hole 311 It is more preferable to be proximal than the position corresponding to the proximal end.

If the abutting portions between the outer wall portions 32, 32 and the inner wall portions 33, 33 are on the distal end side of the central portion of the insertion hole 311 in the longitudinal direction L, the strength of the distal harness fixing portion 30 is further improved. However, a space for fixing the wire harness bundle 100 cannot be secured. On the other hand, when the contact portion between the outer wall portions 32, 32 and the inner wall portions 33, 33 is closer to the proximal side than one-third of the length along the longitudinal direction L of the outer wall portions 32, 32 , there is a risk that the strength of the distal end harness fixing portion 30 cannot be sufficiently improved.

On the other hand, the contact portion between the outer wall portions 32 and 32 and the inner wall portions 33 and 33 is 1/3 of the length along the longitudinal direction L of the outer wall portions 32 and 32 and the insertion hole 311 The space for fixing the wire harness bundle 100 can be reliably secured while improving the strength of the distal end side harness fixing portion 30 by being between the central portion in the longitudinal direction L and the base end side.

Further, when the length of the outer wall portions 32, 32 along the longitudinal direction L is between 1/3 and the position corresponding to the base end portion of the insertion hole 311, more certainty is obtained. A space for fixing the wire harness bundle 100 can be secured while maintaining strength.

Further, the wall portion 35 has a tip wall portion 34 that stands up from the tip end of the harness fixing surface 31 and is connected to the tip end of each of the outer wall portions 32 , 32 . The tip wall portion 34 and the outer peripheral surface 22 (second outer peripheral surface 22 b ) form a rectangular rib, and the wall portion 35 can be provided with inner wall portions 33 , 33 . As a result, the outer wall can be reinforced from the inner side of the harness fixing surface 31, and the strength of the distal end side harness fixing portion 30 can be further improved.

In correspondence with the configuration of this invention and the above-described embodiments,
The wire harness corresponds to the wire harness bundle 100, and similarly,
The harness fixing part corresponds to the tip side harness fixing part 30,
The extending direction corresponds to the +L side in the longitudinal direction L,
The standing direction corresponds to the +H side in the vertical direction H,
The reinforcing rib corresponds to the rib 27,
The outer end wall corresponds to the tip wall 34, but
The present invention is not limited to the configurations of the above-described embodiments, and many embodiments can be obtained.

In addition, in the following description, the same numbers are attached to the same configurations as in the present embodiment, and the description thereof is omitted. In addition, the contents described below cannot be implemented only in each aspect, and can be appropriately combined as long as the effect is exhibited.

For example, in the present embodiment, the pair of outer wall portions 32, 32 are configured to be parallel to each other, but they do not necessarily have to be parallel. You may incline with respect to the normal line direction of 2nd outer peripheral surface 22b). Specifically, both the outer wall portions 32, 32 may be slanted inward in the width direction W, or may be slanted outward in the width direction W.

Further, in the present embodiment, the pair of inner wall portions 33, 33 are separated by a predetermined distance between the proximal end portions. You may
In addition, in the present embodiment, the harness fixing surface 31 is configured to be inclined upward (+H side) along the longitudinal direction L as it goes toward the distal end side, but it may be inclined downward. . Moreover, the harness fixing surface 31 does not necessarily have to be inclined, and may be configured to be parallel to a surface orthogonal to the vertical direction H.

Furthermore, the proximal-side harness fixing portion 40 does not have a structure corresponding to the inner wall portions 33 , 33 , but the proximal-side harness fixing portion 40 may have a structure corresponding to the inner wall portions 33 , 33 . may be slanted upwards.

Further, in the present embodiment, the wall portion 35 is erected upward from the harness fixing surface 31, and the wire harness bundle 100 is routed on the bottom side of the harness fixing surface 31. The wall portion 35 may be erected downward from the surface 31 , or the wall portion 35 may be erected upward and downward from the harness fixing surface 31 .

Furthermore, the wire harness bundle 100 is fixed to a surface of the harness fixing surface 31 where the inner wall portions 33, 33 are not erected. It is good also as a structure fixed to the surface which is carrying out. When the wire harness bundle 100 is fixed to the surface of the harness fixing surface 31 on which the inner walls 33 , 33 stand, the wire harness bundle 100 is routed between the inner walls 33 , 33 .

1 Electrical Junction Box 2 Housing Body 25 Projecting Part 26 Recess 27 Rib 30 Tip Side Harness Fixing Part 31 Harness Fixing Surface 311 Insertion Hole 33 Inner Wall Part 34 Tip Wall Part 35 Wall Part 100 Wire Harness Bundle H Vertical Direction L Longitudinal Direction

Claims (9)

An electrical connection box in which a harness fixing portion for fixing a wire harness is provided in a housing body,
The harness fixing part is
A harness fixing surface extending from the outer peripheral surface of the housing body toward the outside of the housing body and fixing the wire harness, and a wall portion erected from the harness fixing surface,
the wall portion
a pair of inner wall portions that are separated from each other in the extending direction of the harness fixing surface;
An electric connection box including a pair of outer wall portions extending from the outer peripheral surface in the extending direction and connected to the inner wall portion. 2. The electric connection box according to claim 1, wherein the ends of the pair of inner walls opposite to each other in the direction of extension are spaced apart from each other by a predetermined distance and connected to the housing body. The direction in which the outer wall portion is erected from the harness fixing surface is defined as the erecting direction, and the harness fixing surface side of the end portion of the outer wall portion on the erecting direction side is directed from the outer peripheral surface to the extending direction. is provided with a protrusion projecting from the
The protrusion is
an end portion of the harness fixing surface opposite to the extending direction; and
3. The electrical junction box according to claim 1, wherein the electrical connection box is connected to an end portion of the inner wall portion opposite to the extending direction. A concave portion recessed in the erecting direction is formed on an end face of the projecting portion opposite to the erecting direction,
4. The electrical junction box according to claim 3, wherein said recess is provided with a reinforcing rib along said extending direction. The harness fixing surface is
The electric connection box according to any one of claims 1 to 4, wherein the wall portion inclines toward the direction in which the wall portion is erected as it extends in the extending direction. 6. The electric junction box according to claim 1, wherein said outer wall portions are arranged parallel to each other. The direction in which the wall portion is erected from the harness fixing surface is defined as an erection direction,
7. The electric junction box according to claim 1, wherein end surfaces of the inner wall portion and the outer wall portion in the erecting direction are flush with each other. The harness fixing surface is formed with an insertion hole that is inserted along the plate thickness direction,
8. The electric junction box according to claim 1, wherein a contact portion between the inner wall portion and the outer wall portion is arranged on the opposite side of the insertion hole in the extending direction. . The wall portion
9. An outer end wall portion erected from an outer end portion of the harness fixing surface and connected to an outer end portion of the outer wall portion or the inner wall portion. electrical junction box described in .

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