JP6527730B2 - Electrical connection box and wire harness - Google Patents

Description

  The present invention relates to an electrical connection box and a wire harness.

  BACKGROUND ART An electric connection box is mounted on a vehicle such as an automobile for distributing electric power from a power source such as a battery to each electronic device. As this type of electrical connection box, one provided with a box main body to which various electronic components are assembled and a water draining hole for draining water that has entered inside the box main body to the outside is used.

Patent No. 3464394

  By the way, the electric connection box of the above-mentioned patent document 1 is provided with the water removal hole for discharging | emitting the water which entered inside at the bottom of the box main body, for example. For this reason, when the water on the road surface is bounced up due to the traveling condition of the automobile, the above-mentioned electrical connection box may intrude the splashed water into the inside through the drainage hole. However, it is desirable that the electrical connection box can suppress the infiltration of water while making it possible to discharge the water that has entered the inside.

  The present invention has been made in view of the above circumstances, and it is possible to discharge water that has entered the inside of the electric connection box, but it is also possible to suppress the inflow of water. And it aims at providing a wire harness.

In order to achieve the above object, an electrical connection box according to the present invention includes a box body to which an electronic component is assembled, and a wire provided at the lower end in the vertical direction of the box body and electrically connected to the electronic component. A positioning piece for projecting the wire from the inner edge at least vertically below the wire insertion hole to position the wire, and the wire of the positioning piece And a water draining groove formed in a concave shape from the lower end in the vertical direction of the inner surface to be overlapped and parallel to the longitudinal direction of the electric wire positioned by the positioning piece, the water draining groove being formed on the bottom surface of the box main body An outer edge close to the wire through hole and an inner surface of a weir provided at the lower end of the positioning piece in the vertical direction, and formed over the inner surface of the positioning piece and the bottom surface of the box main body ;
The edge of the weir is close to the bottom surface of the box body, and a step is formed between the box body and the bottom surface of the box body .

  Further, in the electrical connection box, the drainage groove may be inclined in a downward direction gradually toward the outside of the box body.

  Further, in the electrical connection box, the drainage groove may be formed such that the width is gradually narrowed toward the outside of the box body.

In order to achieve the above object, the wire harness according to the present invention passes a box main body to which an electronic component is assembled, and an electric wire provided at the lower end in the vertical direction of the box main body and electrically connected to the electronic component. An electric connection box having a wire passing hole; and the wire; wherein the box main body protrudes from the inner edge at least vertically below the wire passing hole to the outside of the box body and positions the wire The water is provided with a positioning piece and a drainage groove along the longitudinal direction of the electric wire which is formed in a concave shape from the lower end in the vertical direction of the inner surface on which the electric wire of the positioning piece is overlapped and is positioned by the positioning piece vent grooves, the box is the inner surface of the trough provided in the vertical direction lower end of the outer portion and the positioning piece of the wire insertion hole side of the bottom surface of the body, the bottom surface of the box body and the inner surface of the positioning piece Is formed over the gutter, said end portion of the bottom side of the box body is closed, characterized in that the step is formed between the bottom surface of the box body.

  In the electric connection box according to the present invention, the water draining groove is provided at the lower end portion in the vertical direction of the inner surface of the positioning piece for positioning the electric wire by projecting to the outside of the box main body from the inner edge at least vertically below the wire passing hole. Further, in the electrical connection box, the drainage groove is formed in parallel with the longitudinal direction of the electric wire positioned by the positioning piece. Accordingly, when the electric connection box is positioned on the positioning piece, the upper side of the drainage groove can be covered with the electric wire, and a space in which water can flow between the inner surface of the drainage groove and the electric wire is secured. be able to. As a result, the electric connection box can discharge the water which has entered the inside of the box body to the outside through the water draining groove provided on the positioning piece, and can prevent the external water from infiltrating the water draining groove, While it is possible to discharge the water that has entered the inside of the electrical connection box, it is possible to suppress the entry of water.

FIG. 1 is a perspective view showing a schematic configuration of the electrical connection box according to the embodiment. FIG. 2 is a perspective view showing a schematic configuration in the vicinity of the wire through hole of the lower cover of the electric connection box according to the embodiment. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is a cross-sectional view taken along the line V-V in FIG. FIG. 6 is a plan view of a positioning piece or the like provided with a drainage groove of the electric connection box according to the first modification of the embodiment. FIG. 7 is a cross-sectional view of a positioning piece or the like provided with a drainage groove in an electric connection box according to Modification 2 of the embodiment.

  Hereinafter, embodiments according to the present invention will be described in detail based on the drawings. The present invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily replaced by persons skilled in the art or those that are substantially the same.

[Embodiment]
FIG. 1 is a perspective view showing a schematic configuration of the electrical connection box according to the embodiment. FIG. 2 is a perspective view showing a schematic configuration in the vicinity of the wire through hole of the lower cover of the electric connection box according to the embodiment. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is a cross-sectional view taken along the line V-V in FIG. FIG. 1 illustrates the upper cover of the electrical connection box by a two-dot chain line.

  The electric connection box 100 shown in FIG. 1 according to the present embodiment is mounted on a vehicle such as a car, and various types of power supplied from a power source such as a battery are mounted on the vehicle via various electronic components 102 and the like. Distribution to electronic devices. Here, as shown in FIG. 1, the electric connection box 100 is incorporated in the wire harness 150 and is an electrical component such as a connector, a fuse, a relay, a branch portion, an electronic control unit, etc. that constitutes a connection processing component such as the electric wire 151. Are integrated and housed inside. The electric connection box 100 is installed, for example, in an engine room of the vehicle or a lower portion of a vehicle body, and is connected between a power supply such as a battery and various electronic devices mounted in the vehicle. The electrical connection box 100 may also be called a junction box, a fuse box, a relay box, etc., but in the present embodiment, these are collectively referred to as an electrical connection box.

  In the electrical connection box 100 illustrated in FIG. 1, various electronic components 102 are accommodated in an accommodation space portion inside the box body 101. The box body 101 includes, for example, a body 103, an upper cover 104, a lower cover 105, and the like. The box main body 101 has a three-layer divided structure in which a body 103, an upper cover 104, and a lower cover 105 are divided. The body 103, the upper cover 104, and the lower cover 105 are formed of insulating synthetic resin. The body 103 is a main member forming a housing space portion in which the electronic component 102 is assembled. The body 103 is formed in a substantially U-shaped cylindrical shape, and the opening is located on the upper side in the vertical direction and the lower side in the vertical direction when the electric connection box 100 is connected to an engine room or the like. The outer wall 110 of the body 103 has two of an outer wall 110a and an inner wall 110b disposed inside the outer wall 110a in order to prevent water from entering the body 103, ie, the electric connection box 100. It has a double-walled structure. The upper cover 104 is a lid-like member that closes an opening on the upper side in the vertical direction of the body 103. The lower cover 105 is a plate-like (tray-like) member attached to the body 103 and closing an opening on the lower side in the vertical direction of the body 103. In the box body 101, the upper opening in the vertical direction of the body 103 opposes the opening in the upper cover 104, and the lower opening in the vertical direction of the body 103 opposes the opening of the lower cover 105. The lower cover 105 is assembled on the upper side of the body 103 in the vertical direction, and the lower cover 105 is assembled on the lower side of the body 103 in the vertical direction. In the box body 101, the upper cover 104 and the lower cover 105 are engaged with the body 103 via various types of engagement mechanisms 106. The direction in which the body 103, the upper cover 104, and the lower cover 105 are stacked is typically along the vertical direction with the electrical connection box 100 connected to the engine room or the like. Depending on the installation situation of the connection box 100, the stacked direction may be installed at a predetermined angle with respect to the vertical direction.

  As described above, the various electronic components 102 assembled in the housing space portion inside the box main body 101 include a connector, a fuse, a relay, a branch portion, an electronic control unit, and the like. The electric connection box 100 includes the above various structures in various cavities formed by variously shaped partition walls 107 integrally formed in the body 103 and variously shaped blocks 108 detachably assembled to the body 103. The electronic component 102 is assembled. In this case, the partition wall 107, the block 108, and the like are also formed of insulating synthetic resin, similarly to the body 103 and the like. Then, in the electrical connection box 100, the terminals and the like of the wires 151 connected to the electronic component 102 are wired vertically through the opening 30a and the like to the cavity in which various electronic components 102 are assembled. It mates from and is electrically connected. Further, the electric connection box 100 constitutes a wire 151 or the like electrically connected to the electronic component 102 and a wire harness 150 to be wired in a vehicle such as a car. That is, the wire harness 150 includes the electric connection box 100 and a plurality of electric wires 151 electrically connected to the electronic components 102 of the electric connection box 100.

  The lower cover 105 constituting the box main body 101 is, as shown in FIGS. 1 and 2, a plurality of tray-shaped cover main bodies 10 for closing the opening on the lower side in the vertical direction of the body 103, a plurality of fixed bracket portions 20, , And a plurality of positioning pieces 40 (only one is shown in FIG. 2). The cover main body 10 is formed in a tray shape in which the lower side in the vertical direction is closed by the bottom surface 10 a.

  The fixing bracket portion 20 is for fixing the lower cover 105, that is, the electric connection box 100 to a vehicle body 200 (shown in FIG. 3) of the vehicle. The fixing bracket portion 20 is formed in a columnar shape extending toward the vehicle body 200 from the outer surface of the cover main body 10, and a hole 21 through which a bolt 201 (shown in FIG. 3) can be passed There is. The lower end portion of the fixed bracket portion 20 is overlapped with the vehicle body 200, and the bolt 201 passing through the hole 21 is screwed into a weld nut (not shown) fixed to the vehicle body 200. Fix it to 200.

  The opening 30 is for wiring the electric wire 151 inside and outside the electric connection box 100. The opening 30 penetrates the cover main body 10 and passes the electric wire 151 inside. The planar shape of the opening 30 is round. One of the plurality of openings 30 located at the lowermost position in the vertical direction (hereinafter, indicated by reference numeral 30a) corresponds to the wire through hole described in the claims. The opening 30 a is provided at the lower end in the vertical direction of the cover main body 10 of the lower cover 105 in a state where the electric connection box 100 is fixed to the vehicle body 200 and mounted on the vehicle. Hereinafter, in the present specification, the vertical direction, the lower end in the vertical direction, the upper side in the vertical direction, the lower side in the vertical direction, and the lowermost side in the vertical direction are the electric connection box 100 fixed to the vehicle body 200 and mounted on the vehicle. In the vertical direction, the lower end in the vertical direction, the upper side in the vertical direction, the lower side in the vertical direction, and the lowermost side in the vertical direction. Further, the lower end in the vertical direction means a portion including the lowermost portion in the vertical direction and the vicinity thereof, and at the position of the opening 30a, the water which has entered the box body 101 of the electric connection box 100 is particularly the lower cover The position which can be discharged | emitted through the opening part 30a without accumulating in 105 is said. Since the electric wire 151 passed through the opening 30a is provided at the lower end in the vertical direction of the cover main body 10 of the lower cover 105, as shown in FIG. To bend.

  The positioning piece 40 positions the electric wire 151 wired in and out of the electric connection box 100 through the openings 30 and 30a. The positioning pieces 40 correspond to the openings 30 and 30a. The positioning piece 40 is formed in a cylindrical or semi-cylindrical shape projecting to the outside of the cover body 10 from the inner edge of the corresponding opening 30, 30a. The projecting direction of the positioning piece 40 to the outside of the cover body 10 is a direction along the wiring path of the electric wire 151 with respect to the vehicle, typically parallel. Further, the positioning piece 40 may be appropriately curved along the wiring path of the electric wire 151. The positioning piece 40 has a cross-sectional shape substantially the same as all or part of the inner edge of the opening 30, 30a. The positioning piece 40 has the electric wire 151 superimposed on the inner surface 40 b to position the electric wire 151.

  In the present embodiment, a positioning piece 40 (hereinafter, indicated by reference numeral 40a) corresponding to the opening 30a is formed in a cylindrical shape that protrudes to the outside of the cover main body 10 from the entire inner edge of the opening 30a. Thus, the positioning piece 40a protrudes to the outside of the cover main body 10 from the inner edge of the opening 30a at least vertically below by protruding to the outside of the cover main body 10 from the entire inner edge of the opening 30a. The inner lower edge in the vertical direction of the opening 30a provided with the positioning piece 40a includes the lowermost portion in the vertical direction of the inner edge of the opening 30a, and refers to the inner edge of the lower half in the substantially vertical direction.

  As shown in FIG. 3, the lowermost portion of the positioning piece 40 a in the vertical direction of the inner surface 40 b is formed flush with the bottom surface 10 a of the cover main body 10. The bottom surface 10a of the lower cover 105 is gradually inclined downward as it approaches the opening 30a and the positioning piece 40a. In addition, the positioning piece 40 a is gradually inclined downward as it goes from the bottom surface 10 a to the outside of the cover main body 10.

  Further, as shown in FIG. 4 and FIG. 5, a drainage groove 50 is formed in the positioning piece 40 a. That is, the lower cover 105 which comprises the box main body 101 is provided with the water drain groove 50. The water drain groove 50 drains the water that has entered the inside of the electrical connection box 100 to the outside. The drainage groove 50 is formed in a concave shape from the lower end in the vertical direction of the inner surface 40b of the positioning piece 40a, and extends from the outer edge near the opening 30a of the bottom surface 10a of the lower cover 105 to the entire length of the inner surface 40b of the positioning piece 40a It forms along the longitudinal direction of the electric wire 151 positioned by 40a (this embodiment parallel).

  Specifically, the drainage groove 50 is configured by an outer edge near the opening 30a of the bottom surface 10a of the lower cover 105 and an inner surface 51a of a weir 51 provided at the lower end of the positioning piece 40a in the vertical direction. As shown in FIG. 4, the weir 51 is formed in a U-shaped cross section with the upper side in the vertical direction opened, and both ends of the cross section are continuous with the bottom surface 10 a and the lower end in the vertical direction of the positioning piece 40 a. Furthermore, the end close to the bottom surface 10 a of the weir 51 is closed, and the outside end of the cover body 10 of the lower cover 105 of the weir 51 is open. The inner surface 51 a of the drainage groove 50 is gradually inclined downward as it goes to the outside of the lower cover 105 that constitutes the box body 101. In the present embodiment, the width of the drainage groove 50 is constant in the longitudinal direction as shown in FIG. 5, and the depth from the bottom surface 10a of the drainage groove 50 and the inner surface 40b of the positioning piece 40a is As shown in FIG. 3, it is formed in the longitudinal direction in a constant manner. Thus, the inner surface 51a of the drainage groove 50 is disposed vertically lower than the bottom surface 10a of the lower cover 105, and a step 52 is formed between the inner surface 51a and the bottom surface 10a.

  The positioning piece 40 a having the above-described configuration superposes the electric wire 151, which is passed through the opening 30 a and wired in and out of the electric connection box 100, on the inner surface 40 b and positions it. Then, the positioning piece 40 a is wound around the outer periphery together with the wire 151, such as a binding band or a tape, to fix the wire 151.

  According to the electrical connection box 1 described above, the lower end portion in the vertical direction of the inner surface 40b of the positioning piece 40a for positioning the electric wire 151 by projecting from the inner edge of the lower portion of the opening 30a in the vertical direction to the outside of the cover body 10 of the lower cover 105 The water drain groove 50 is provided in the Moreover, the electrical connection box 100 forms the drainage groove 50 in parallel with the longitudinal direction of the electric wire 151 positioned by the positioning piece 40a. Accordingly, when the electric connection box 100 positions the electric wire 151 on the positioning piece 40a, the upper side of the drainage groove 50 can be covered with the electric wire 151, so that external water can be prevented from entering the drainage groove 50. Intruding into the body 103 can be suppressed.

  In addition, when the electric connection box 100 positions the electric wire 151 on the positioning piece 40a, the inner surface 51a of the drainage groove 50 and the electric wire 151 are spaced apart. Further, in the electric connection box 100, the drainage groove 50 is formed across the inner surface 40b of the positioning piece 40a and the bottom surface 10a of the lower cover 105, and the electric wire 151 is curved toward the body 103 inside the opening 30a. A space in which water can flow can be secured between the inner surface 51 a of the drainage groove 50 and the electric wire 151. Thus, the electric connection box 100 can discharge the water that has entered the body 103 to the outside through the water drain groove 50 provided in the positioning piece 40 a of the lower cover 105. As a result, the electrical connection box 100 has the effect of being able to suppress the entry of water while making it possible to discharge the water that has entered the interior of the box body 101.

  Further, in the electric connection box 100, the inner surface 51a of the drainage groove 50 is gradually inclined downward as going from the bottom surface 10a of the lower cover 105 of the box main body 101 to the outside of the cover main body 10 of the lower cover 105 of the box main body 101. Therefore, the water in the drainage groove 50 can be discharged to the outside. As a result, the electrical connection box 100 can make it possible to discharge the water that has entered the inside of the box body 101.

  Since the wire harness 150 described above includes the electric connection box 100, water can enter the electric connection box 100 while allowing water that has entered the electric connection box 100 to be drained. The effect is that it is possible to suppress

[Modification 1]
Next, an electrical connection box 100 according to a first modification of the embodiment will be described based on FIG. FIG. 6 is a plan view of a positioning piece or the like provided with a drainage groove of the electric connection box according to the first modification of the embodiment. In FIG. 6, the same parts as those of the embodiment are indicated by the same reference numerals and the description thereof is omitted.

  As shown in FIG. 6, the drainage groove 50 provided in the positioning piece 40a of the electrical connection box 100 according to the first modification of the embodiment is gradually moved toward the outside of the cover main body 10 of the lower cover 105 of the box main body 101. The width is narrow.

  According to the electrical connection box 100 according to the first modification, as in the embodiment, while it is possible to discharge the water that has entered the inside of the box main body 101, it is possible to suppress the entry of water. It plays an effect. Furthermore, in the electric connection box 100 according to the first modification, since the width of the drainage groove 50 is gradually narrowed toward the outside of the box main body 101, the end side of the positioning piece 40a of the drainage groove 50 is formed. Water can be suppressed from entering through the opening.

[Modification 2]
Next, an electric connection box 100 according to a second modification of the embodiment will be described based on FIG. FIG. 7 is a cross-sectional view of a positioning piece or the like provided with a drainage groove in an electric connection box according to Modification 2 of the embodiment. In FIG. 7, the same parts as those of the embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

  As shown in FIG. 7, the drainage groove 50 provided in the positioning piece 40a of the electric connection box 100 according to the second modification of the embodiment is located closer to the center of the inner surface 40b of the positioning piece 40a and the bottom surface 10a of the lower cover 105. Are formed over the

  According to the electrical connection box 100 according to the second modification, as in the embodiment, while it is possible to discharge the water that has entered the inside of the box main body 101, it is possible to suppress the entry of water. It plays an effect. Furthermore, in the electric connection box 100 according to the second modification, since the drainage groove 50 is formed across the positioning piece 40a and the bottom surface 10a, water is allowed to flow between the inner surface 51a of the drainage groove 50 and the electric wire 151. A space that can be flowed can be secured, and water that has entered the box body 101 can be discharged.

  In addition, the electrical connection box 100 which concerns on this invention is not limited to embodiment and the modification which were mentioned above, A various change is possible in the range described in the claim. For example, in the electric connection box 100 according to the present invention, the body 103 of the box body 101 and the lower cover 105 may be integrally formed, and the box body 101 may be divided into two layers. Further, in the present invention, the positioning piece 40a corresponding to the opening 30a may be formed in a semi-cylindrical shape projecting to the outside of the cover main body 10 from the inner edge on the lower side in the vertical direction of the opening 30a. That is, in the present invention, the positioning piece 40a corresponding to the opening 30a may protrude to the outside of the cover main body 10 of the lower cover 105 from the inner edge at least vertically below the opening 30a. Furthermore, in the present invention, the inner surface 51a of the drainage groove 50 and the weir 51 may have various cross-sectional shapes such as a V-shaped cross section or a U-shaped cross section. Furthermore, in the present invention, the drainage groove 50 may be formed in a concave shape from the inner surface 40b of the positioning piece 40a by thinning a part of the thickness of the positioning piece 40a. In the above-described embodiment, the positioning piece 40a is described as being integrally molded with the lower cover 105. However, the present invention is not limited to this, and may be molded separately.

30a Opening (wire through hole)
40a Positioning piece 40b Inner surface 50 Water draining groove 100 Electric connection box 101 Box body 102 Electronic parts 150 Wire harness 151 Electric wire

Claims (4)

A box body on which electronic components are assembled;
And an electric wire through hole provided at the lower end in the vertical direction of the box body and through which an electric wire electrically connected to the electronic component is passed;
The box body is
A positioning piece which protrudes to the outside of the box body from the inner edge at least vertically below the electric wire through hole and positions the electric wire;
And a water drain groove along the longitudinal direction of the electric wire which is formed in a concave shape from the lower end in the vertical direction of the inner surface of the positioning piece on which the electric wire is overlapped, and which is positioned by the positioning piece;
The drainage groove is an outer edge of the bottom surface of the box main body near the electric wire passing hole and an inner surface of a weir provided at a lower end in the vertical direction of the positioning piece, and the inner surface of the positioning piece and the bottom surface of the box main body Formed across the
In the weir, an end close to the bottom surface of the box main body is closed, and a step is formed between the box main body and the bottom surface .
Electrical connection box. The drainage groove is inclined in a downward direction gradually toward the outside of the box body.
The electrical connection box according to claim 1. The drainage groove is gradually narrowed in width toward the outer side of the box body.
The electrical connection box according to claim 1 or 2. An electrical connection box comprising: a box body to which an electronic component is assembled; and an electric wire through hole provided at a lower end in the vertical direction of the box body and electrically connected to the electronic component.
And the electric wire,
The box body is
A positioning piece which protrudes to the outside of the box body from the inner edge at least vertically below the electric wire through hole and positions the electric wire;
And a drainage groove formed in a concave shape from the lower end in the vertical direction of the inner surface of the positioning piece on which the electric wire is overlapped, and parallel to the longitudinal direction of the electric wire positioned by the positioning piece;
The drainage groove is an outer edge of the bottom surface of the box main body near the electric wire passing hole and an inner surface of a weir provided at a lower end in the vertical direction of the positioning piece, and the inner surface of the positioning piece and the bottom surface of the box main body Formed across the
In the weir, an end close to the bottom surface of the box main body is closed, and a step is formed between the box main body and the bottom surface .
Wire harness.

Images