JP2022190603A - Electric connection box - Google Patents

Abstract

To provide an electric connection box capable of compatibly suppressing water from entering a storage space and exhausting heat from the storage space.SOLUTION: An electric connection box 1 internally has a storage space in which an electronic component R is housed. The electric connection box 1 comprises: a retention part 12 which retains the electronic component R; a first opening part 33 which is provided in a bottom wall 32 of the electric connection box 1 to drain water from the inside to the outside of the storage space, and links the inside and outside of the storage space to each other; and a second opening part 14 which is arranged to hold the retention part 12 with the first opening part 33, links the inside and outside of the storage space to each other and suppresses water from entering the inside of the storage space from the outside. The second opening part 14 has, as a water-stop structure, a recessed wall 15 which has a concave shape hollowed from the outside to the inside of the storage space, and a through hole 16 which is arranged at an inner part in the hollow direction of the recessed wall 15 and links the inside and outside of the storage space to each other.SELECTED DRAWING: Figure 4

Description

TECHNICAL FIELD The present invention relates to an electrical connection box having a storage space inside which can store electronic components.

2. Description of the Related Art Conventionally, an electric connection box has been proposed, such as a relay box mounted on a vehicle, having a housing space inside for housing electronic components such as relays and fuses (see, for example, Patent Document 1). .

JP-A-8-275335

The electrical junction box described above is provided with an intake port and an exhaust port on the outer wall defining the housing space, and the heat generated by the electronic components when driven is taken in from the intake port and discharged from the exhaust port together with the air inside the housing space. It is designed to be discharged to the outside from. However, for example, when water is sprayed against such an electrical junction box (for example, when a vehicle equipped with an electrical junction box is subjected to high-pressure washing), the electric Water may enter inside the junction box. If water that has entered the electric connection box comes into contact with electronic parts such as relays, it may interfere with the normal operation of those electronic parts. Therefore, it is desirable to exhaust heat from the housing space while preventing such intrusion of water.

SUMMARY OF THE INVENTION The present invention has been made in view of the circumstances described above, and an object of the present invention is to provide an electrical connection box that can both suppress water from entering the accommodation space and exhaust heat from the accommodation space. It is in.

In order to achieve the above object, an electric connection box according to the present invention is characterized by the following [1] to [3].
[1]
An electric junction box having a housing space capable of housing electronic components therein,
a holding portion for holding the electronic component;
a first opening provided in the bottom wall of the electric connection box for draining water from the inside of the accommodation space to the outside, and communicating between the inside and the outside of the accommodation space;
A second water stop structure disposed so as to sandwich the holding portion between the first opening portion and communicating between the inside and the outside of the accommodation space and suppressing the intrusion of water from the outside to the inside of the accommodation space. an opening;
Must be an electric junction box.
[2]
In the electrical junction box described in [1] above,
The second opening is
As the water stop structure, a concave wall having a concave shape that is concave from the outside to the inside of the accommodation space, and a through hole that is arranged at the inner part of the concave wall facing the concave and communicates the inside and the outside of the accommodation space. has
Must be an electric connection box.
[3]
In the electrical connection box according to [1] or [2] above,
The bottom wall is
sloped to guide water towards the first opening;
Must be an electric connection box.

According to the electrical connection box having the configuration [1] above, the first opening provided in the bottom wall of the electrical connection box so as to sandwich the holding portion that holds the electronic component, and the opening from the outside to the inside of the accommodation space. and a second opening having a water stop structure that suppresses water from entering. As the air warmed by the heat emitted from the electronic components moves upward, an upward air flow is generated inside the housing space. In other words, an air flow (a so-called chimney effect air flow) is such that the air that flows in from the first opening arranged on the bottom wall of the electrical junction box passes through the holding portion and is discharged from the second opening. ) occurs. As a result, it is possible to efficiently exhaust heat from the housing space. Since there is no need to incorporate parts such as an electric fan into the electrical connection box, there are also advantages in that manufacturing costs and failure risks can be reduced. Furthermore, since the second opening has a waterproof structure, even if the electrical connection box is submerged in water, water is prevented from entering the accommodation space. Since the first opening is originally intended for drainage, even if water enters from the first opening, the water will be quickly discharged from the first opening. Therefore, the electrical connection box of this configuration can both suppress water intrusion into the accommodation space and exhaust heat from the accommodation space.

According to the electrical connection box having the configuration [2] above, by arranging the through-hole in the inner part of the recessed wall that is recessed from the outside toward the inside of the housing space, the through-hole is prevented from contacting with water when it is exposed to water. is suppressed. That is, such a water stop structure prevents water from entering the housing space through the second opening.

According to the electrical connection box having the configuration [3] above, the bottom wall of the electrical connection box is inclined so as to guide water toward the first opening. Therefore, even if water enters the storage space through the first opening, the water can be guided to the first opening by the inclination of the bottom wall and quickly discharged from the first opening.

As described above, according to the present invention, it is possible to provide an electric connection box capable of both suppressing water intrusion into the accommodation space and exhausting heat from the accommodation space.

The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading the detailed description below with reference to the accompanying drawings.

FIG. 1 is a perspective view of an electric connection box according to an embodiment of the invention. 2 is an exploded perspective view of the electric junction box shown in FIG. 1. FIG. 3(a) is a top view of the frame shown in FIG. 1, FIG. 3(b) is an enlarged view of part A in FIG. 3(a), and FIG. ) is an enlarged view of part B of FIG. 4(a) is a cross-sectional view taken along the line CC of FIG. 3(a), FIG. 4(b) is an enlarged view of part E of FIG. 4(a), and FIG. 3(c) taken along line DD. FIG. 5(a) is a perspective view showing an enlarged portion F of FIG. 4(a), and FIG. 5(b) is a cross-sectional view taken along line GG of FIG. 5(a).

<Embodiment>
Hereinafter, an electric connection box 1 according to an embodiment of the present invention shown in FIG. 1 will be described with reference to the drawings. The electrical connection box 1 is typically a relay box mounted on a vehicle and having an internal space for accommodating electronic components such as relays and other components R (see FIGS. 2 to 4). Hereinafter, for convenience of explanation, "front", "rear", "left", "right", "upper" and "lower" are defined as shown in FIG. The "front-rear direction", the "left-right direction" and the "up-down direction" are orthogonal to each other. When the electrical connection box 1 is mounted on a vehicle, the terms "front-rear direction", "left-right direction" and "up-down direction" correspond to the front-rear direction, left-right direction and up-down direction of the vehicle, respectively. In addition, the side facing the inside of the electrical junction box 1 is called the "inner" side, and the side facing the outside of the electrical junction box 1 is called the "outer" side.

As shown in FIGS. 1 and 2, the electric connection box 1 includes a frame 2, a lower cover 3 assembled under the frame 2 so as to close the lower end opening of the frame 2, and a frame assembly so as to close the upper end opening of the frame 2. 2, and an upper cover 4 assembled above. All of the above three parts constituting the electrical junction box 1 are resin moldings.

In the electrical junction box 1, as shown in FIG. 1, a wire 6 electrically connected to a part of the component R located inside the electrical junction box 1 is provided on the front side of the electrical junction box 1. The wires are led out to the outside of the electric junction box 1 through the wire outlet hole 5 . Furthermore, a wire (not shown) electrically connected to another part of the component R is passed through a wire outlet hole 9 (see FIG. 4A) provided in the lower left part of the electrical connection box 1. It is led out to the outside of the electrical connection box 1 . In addition, an electric wire 8 electrically connected to a busbar (not shown) attached to a holding portion 12 inside the electric junction box 1 is led out of the electric junction box through the electric wire lead-out hole 7. there is In addition to the electric wire 8 or instead of the electric wire 8, an electric wire electrically connected to another electric junction box (for example, another electric junction box for function expansion) may be connected to the bus bar.

The frame 2, the lower cover 3, and the upper cover 4 that constitute the electric connection box 1 will be described in order below. First, frame 2 will be described. As shown in FIGS. 1 to 4, the frame 2 includes a substantially rectangular cylindrical side wall portion 11 extending vertically. The side wall portion 11 constitutes most of the appearance of the side surface of the electrical connection box 1 . As shown in FIGS. 2 to 4, the side wall portion 11 has a flat holding portion 12 extending in a direction perpendicular to the vertical direction of the internal space of the side wall portion 11 so as to divide the space vertically into two. is provided. A plurality of types of components R are held by the holding portion 12 so as to be aligned along the extending direction of the holding portion 12 .

As shown in FIGS. 1 and 2, the vertically extending corner on the front right side of the side wall 11 is recessed toward the inside of the electric connection box 1 except for the upper edge of the side wall 11. A concave portion 13 is provided so as to extend in the vertical direction. An opening 14 is provided at a portion of the side wall 11 that defines the upper end of the recess 13 (see FIGS. 3(a), 3(b), 4(a) and 4(b)). . The opening 14 corresponds to the "second opening" in the present invention.

As shown particularly in FIG. 4B, the opening 14 has a concave wall 15 having a concave shape that is concave upward (from the outside to the inside of the electrical connection box 1), and the concave direction of the concave wall 15. and a through hole 16 arranged in the inner part (bottom part of the concave shape) of the electrical connection box 1 and penetrating in the vertical direction (communicating the inside and the outside of the electric connection box 1). Therefore, even if the electrical junction box 1 is exposed to water, the recessed wall 15 recessed from the outside toward the inside of the electrical junction box 1 allows water to flow directly into the through hole 16 arranged in the inner part of the recessed wall 15 . Contact is suppressed. That is, the opening 14 has a waterproof structure that prevents water from entering from the outside of the electric connection box 1 to the inside. The opening 14 cooperates with a communication hole 17 and an opening 33, which will be described later, to perform an exhaust function of discharging air from the inside of the electrical connection box 1 to the outside, in addition to the above-described water stopping function. This point will be described later. Note that the opening 33 corresponds to the "first opening" in the present invention.

The holding portion 12 has, for example, a communication hole 17 formed at a predetermined location on the rear end portion thereof for communicating the upper space of the holding portion 12 and the lower space of the holding portion 12 (FIG. 3A). ), see FIGS. 3(c) and 4(c)). In addition to the communication hole 17 , the holding part 12 may have a communication hole such as the communication hole 17 that communicates between the space above the holding part 12 and the space below the holding part 12 . The effect of providing the communication hole 17 will be described later.

Engaged portions 18 each including a vertically extending through-hole are integrally provided on the outer surface of the lower end portion of the side wall portion 11 at a plurality of locations (seven locations in this example) in the circumferential direction (see FIG. 1). ~ see Figure 3). The locked portion 18 has a function of assembling the lower cover 3 to the frame 2 .

Locked portions 19 are provided integrally with the outer surface of the upper end portion of the side wall portion 11 at a plurality of locations (three locations in this example) in the circumferential direction (see FIGS. 1 to 3). The locked portion 19 has a function of assembling the upper cover 4 to the frame 2 .

Stay portions 21 extending downward are integrally provided on the outer surface of the lower end portion of the side wall portion 11 at a plurality of locations (four locations in this example) in the circumferential direction (see FIGS. 1 to 3). The stay part 21 has a function of fixing the frame 2 (that is, the electrical junction box 1) to a mounting position of the vehicle by assembling the tip part thereof to the mounting position of the vehicle.

A semi-cylindrical gutter-shaped portion 22 that opens rearward is provided to extend downward (see FIG. 2) at a portion of the side wall portion 11 corresponding to the wire outlet hole 5 (see FIG. 1). The gutter-shaped portion 22 has a function of forming the front portion of the inner wall that defines the wire outlet hole 5 .

A semi-cylindrical gutter-shaped portion 23 that opens downward is provided so as to extend diagonally to the lower right at a portion corresponding to the wire outlet hole 7 (see FIG. 1) in the side wall portion 11 (see FIG. 2). reference). The gutter-shaped portion 23 has the function of forming the upper portion of the inner wall that defines the wire outlet hole 7 . Further, a semi-cylindrical gutter-shaped portion 24 that opens downward is provided so as to extend obliquely in the lower right direction at a portion of the side wall portion 11 corresponding to the wire outlet hole 9 (see FIG. 4A). (See FIG. 3(a)). The gutter-shaped portion 24 has a function of forming the upper portion of the inner wall that defines the wire outlet hole 9 .

Next, the lower cover 3 will be explained. As shown in FIG. 2 , the lower cover 3 includes an annular side wall portion 31 that constitutes most of the outer appearance of the lower side surface of the electrical junction box 1 , and closes the annular lower end opening of the side wall portion 31 and the electrical junction box 1 . and a bottom wall portion 32 that constitutes most of the appearance of the bottom surface. The annular upper edge portion of the side wall portion 31 has a shape corresponding to the annular lower edge portion of the side wall portion 11 of the frame 2 and is fittable with the annular lower edge portion of the side wall portion 11 .

The bottom wall portion 32 has a shape that slopes downward from the rear to the front and slopes downward from the left to the right. Therefore, the inner surface (upper surface) of the bottom wall portion 32 is also inclined downward from the rear to the front and downward from the left to the right. Therefore, on the inner surface of the bottom wall portion 32, the right front corner is the lowest position. As will be described later, since the inner surface of the bottom wall portion 32 is inclined in this way, water that has entered the electric junction box 1 is directed along the inner surface of the bottom wall portion 32 toward the right front corner, which is the lowest position. You will be guided through

An opening 33 is provided near the front right corner of the bottom wall 32, as shown in FIGS. 4(a), 5(a) and 5(b). As shown in FIG. 5, the opening 33 protrudes upward (toward the inside of the electric connection box 1) on the inner surface of the bottom wall portion 32 and extends upward on the outer surface of the bottom wall portion 32 ( a raised portion 34 recessed toward the inside of the electrical junction box 1; and an opening 35 communicating with the inside.

In this way, the opening 33 is provided near the front right corner of the inclined bottom wall 32 (that is, the lowest position of the bottom wall 32). Even if water enters the junction box 1 , the inclination of the bottom wall 32 allows the water to be guided to the opening 33 and quickly discharged from the opening 35 of the opening 33 . The opening 33 cooperates with the opening 14 and the communication hole 17 provided in the frame 2 to perform an intake function of introducing air from the outside of the electric connection box 1 to the inside in addition to the above-described drain function. Demonstrate. This point will be described later.

Locking pieces 36 extending upward corresponding to the plurality of locked portions 18 of the frame 2 are provided on the outer surface of the upper end portion of the side wall portion 31 at a plurality of locations (seven locations in this example) in the circumferential direction. It is integrally provided (see FIG. 2).

A concave portion 37 recessed toward the inside of the electric connection box 1 is provided so as to extend in the vertical direction at a portion corresponding to the wire outlet hole 5 (see FIG. 1) in the side wall portion 11 (see FIG. 2). ). The recessed portion 37 has a function of forming the rear portion of the inner wall that defines the wire outlet hole 5 .

A semi-cylindrical gutter-shaped portion 38 that opens upward is provided so as to extend obliquely to the lower right at a portion of the side wall portion 31 corresponding to the wire outlet hole 7 (see FIG. 1) (see FIG. 2). reference). The gutter-shaped portion 38 has a function of forming the lower portion of the inner wall that defines the wire outlet hole 7 . Further, a semi-cylindrical gutter-shaped portion 39 opening upward is provided at a location corresponding to the wire outlet hole 9 (see FIG. 4A) in the side wall portion 31 so as to extend obliquely in the lower left direction. (See Figure 2). The gutter-shaped portion 39 has a function of forming a lower portion of the inner wall that defines the wire outlet hole 9 .

Next, the upper cover 4 will be explained. As shown in FIG. 2 , the upper cover 4 includes an annular side wall portion 41 that forms most of the outer appearance of the upper side surface of the electrical junction box 1 , and closes the annular upper end opening of the side wall portion 41 and the electrical junction box 1 . and an upper wall portion 42 that constitutes most of the appearance of the upper surface. The annular lower edge portion of the side wall portion 41 has a shape corresponding to the annular upper edge portion of the side wall portion 11 of the frame 2 and is fittable with the annular upper edge portion of the side wall portion 11 .

Locking portions 43 are integrally provided on the outer surface of the side wall portion 41 at a plurality of locations (three locations in this example) in the circumferential direction corresponding to the plurality of locked portions 19 of the frame 2 . . The frame 2, the lower cover 3, and the upper cover 4 that constitute the electrical connection box 1 have been described above.

In order to assemble the electrical connection box 1 comprising the frame 2 , the lower cover 3 and the upper cover 4 , it is necessary to assemble the lower cover 3 to the frame 2 and assemble the upper cover 4 to the frame 2 .

In order to assemble the lower cover 3 to the frame 2, first, the plurality of locking pieces 36 (see FIG. 2) of the lower cover 3 are inserted into the plurality of through holes of the locked portion 18 (see FIG. 2) of the frame 2 from below. From this state, the annular upper edge of the side wall 31 of the lower cover 3 is fitted into the annular lower edge of the side wall 11 of the frame 2, and the plurality of locking pieces 36 are connected to the plurality of covers. The locking portion 18 is locked. This completes the attachment of the lower cover 3 to the frame 2 (see FIG. 1).

Similarly, in order to assemble the upper cover 4 to the frame 2, the annular lower edge portion of the side wall portion 41 of the upper cover 4 is fitted to the annular upper edge portion of the side wall portion 11 of the frame 2, and the upper cover 4 is assembled. 4 are engaged with the plurality of engaged portions 19 of the frame 2 . This completes the assembly of the upper cover 4 to the frame 2 (see FIG. 1).

When the electric junction box 1 is completely assembled, the lower cover 3 is prevented from being separated downward from the frame 2 by the locking of the plurality of locking pieces 36 and the plurality of locked portions 18 . Similarly, the locking of the plurality of locking portions 43 and the plurality of locked portions 19 prevents the upper cover 4 from separating upward from the frame 2 . Further, the gutter-shaped portion 22 of the frame 2 and the concave portion 37 of the lower cover 3 (see FIG. 2) define the wire outlet hole 5 through which the wire 6 is inserted (see FIG. 1). Similarly, the gutter-shaped portion 23 of the frame 2 and the gutter-shaped portion 38 of the lower cover 3 (see FIG. 2) define the wire outlet hole 7 through which the wire 8 is inserted (see FIG. 1).

Hereinafter, the intake action and the exhaust action (and the heat exhaust action) by cooperation between the opening 14 and the communication hole 17 provided in the frame 2 and the opening 33 provided in the lower cover 3 will be described. Hereinafter, for convenience of explanation, as shown in FIG. 4(a), the space above the holding portion 12 of the frame 2 in the internal space of the electric connection box 1 (the space for accommodating the component R) will be referred to as "upper space H1". , and the space below the holding portion 12 of the frame 2 is called a "lower space H2". The holding portion 12 separates the internal space of the electrical connection box 1 into an upper space H1 and a lower space H2.

As shown in FIG. 4A , the opening 14 is positioned above the holding part 12 and the opening 33 is positioned below the holding part 12 . Therefore, the opening 14 and the opening 33 are arranged so as to sandwich the holding part 12 from above and below, the opening 14 communicates with the upper space H1, and the opening 33 communicates with the lower space H2.

When the electric junction box 1 mounted on the vehicle is used, the electronic parts among the parts R positioned inside the electric junction box 1 generate heat as they are driven. When the electronic component generates heat, the heat emitted from the electronic component warms the air around the electronic component (that is, the air located near the holding portion 12 that holds the electronic component). Warmed air tends to rise due to its relative lower density compared to unheated air. As a result, an upward air flow is generated inside the electric junction box 1 .

Specifically, the air sucked into the lower space H2 through the opening 35 (see FIGS. 4A and 5) of the opening 33 provided in the lower cover 3 passes through the communication hole 17 provided in the frame 2 (see FIG. 5). 3(a), 3(c) and 4(c)), the air flows into the upper space H1, and the air that has flowed into the upper space H1 passes through the through hole 16 of the opening 14 provided in the frame 2. A flow of air is created as it exits (see FIGS. 3(a), 3(b), 4(a) and 4(b)). Such air flow is also called the chimney effect. As a result, relatively low-temperature air is introduced into the electrical junction box 1 through the opening 33, and relatively high-temperature air is discharged to the outside of the electrical junction box 1 through the opening 14. Therefore, the heat can be exhausted from the internal space of the electric connection box 1 .

<Action/effect>
As described above, according to the electrical connection box 1 according to the present embodiment, the opening 33 provided in the bottom wall portion 32 of the electrical connection box 1 and the electrical connection portion 33 are provided so as to sandwich the holding portion 12 that holds the electronic component. and an opening 14 having a waterproof structure for suppressing water from entering from the outside of the box 1 to the inside. As the air warmed by the heat emitted from the electronic components rises and convects, an upward air flow is generated inside the electric junction box 1 . In other words, an air flow is generated such that the air that has flowed in from the opening 33 arranged in the bottom wall portion 32 of the electric junction box 1 passes through the holding portion 12 and is discharged from the opening 14 . Thereby, heat can be discharged from the internal space of the electric connection box 1 . Furthermore, since the opening 14 has a waterproof structure, water is prevented from entering the internal space of the electrical connection box 1 . Furthermore, since the opening 33 is originally intended for drainage, even if water enters from the opening 33, the water is quickly discharged from the opening 33. Therefore, the electrical junction box 1 according to the present embodiment is capable of both suppressing water intrusion into the internal space of the electrical junction box 1 and exhausting heat from the internal space of the electrical junction box 1 .

Furthermore, even if the opening 14 is exposed to water, the recessed wall 15 recessed from the outside toward the inside of the electric connection box 1 directly contacts the through hole 16 arranged at the inner part of the recessed wall 15. is suppressed. In other words, such a water blocking structure prevents water from entering the electric junction box 1 through the opening 14 .

Furthermore, the bottom wall portion 32 of the electric junction box 1 is inclined so as to guide water toward the opening portion 33 . Therefore, even if water enters the electrical connection box 1 through the opening 33 , the water can be guided to the opening 33 by the inclination of the bottom wall 32 and quickly discharged from the opening 33 . .

<Other forms>
The present invention is not limited to the above-described embodiments, and various modifications can be adopted within the scope of the present invention. For example, the present invention is not limited to the above-described embodiments, and can be modified, improved, etc. as appropriate. In addition, the material, shape, size, number, location, etc. of each component in the above-described embodiment are arbitrary and not limited as long as the present invention can be achieved.

In the above embodiment, the opening 14 constitutes a waterproof structure with the recessed wall 15 and the through hole 16 . On the other hand, the opening 14 may have any water stop structure as long as it has the function of preventing water from entering from the outside to the inside of the electrical connection box 1 .

Furthermore, in the above embodiment, the electrical junction box 1 is a relay box (electrical junction box) that accommodates a plurality of parts R, but the electrical junction box 1 has a structure having functions other than the relay box (electrical junction box). It can be a body.

Here, the features of the embodiment of the electrical connection box 1 according to the present invention described above are summarized and listed briefly in [1] to [3] below.
[1]
An electric connection box (1) having an accommodating space inside which can accommodate an electronic component (R),
a holding portion (12) for holding the electronic component (R);
a first opening (33) provided in the bottom wall (32) of the electric connection box (1) for draining water from the inside of the accommodation space to the outside, and communicating the inside and outside of the accommodation space;
A stopper disposed so as to sandwich the holding part (12) between the first opening (33), communicates the inside and outside of the accommodation space, and prevents water from entering from the outside to the inside of the accommodation space. a second opening (14) having a water structure;
Electrical Junction Box (1).
[2]
In the electrical connection box (1) described in [1] above,
The second opening (14) is
As the water stop structure, a recessed wall (15) having a recessed shape recessed from the outside to the inside of the accommodation space, and a recessed wall (15) disposed at the recessed back portion of the recessed wall (15) inside and outside the accommodation space and a through hole (16) communicating with
Electrical Junction Box (1).
[3]
In the electrical connection box (1) according to [1] or [2] above,
The bottom wall (32) is
inclined to guide water towards said first opening (33);
Electrical Junction Box (1).

1 electrical connection box 12 holding portion 14 opening (second opening)
15 concave wall 16 through hole 32 bottom wall (bottom wall)
33 opening (first opening)
R parts (electronic parts)

Claims (3)

An electric junction box having a housing space capable of housing electronic components therein,
a holding portion for holding the electronic component;
a first opening provided in the bottom wall of the electric connection box for draining water from the inside of the accommodation space to the outside, and communicating between the inside and the outside of the accommodation space;
A second water stop structure disposed so as to sandwich the holding portion between the first opening portion and communicating between the inside and the outside of the accommodation space and suppressing the intrusion of water from the outside to the inside of the accommodation space. an opening;
electrical connection box. In the electrical connection box according to claim 1,
The second opening is
As the water stop structure, a concave wall having a concave shape that is concave from the outside to the inside of the accommodation space, and a through hole that is arranged at the inner part of the concave wall facing the concave and communicates the inside and the outside of the accommodation space. has
electrical connection box. In the electrical connection box according to claim 1 or claim 2,
The bottom wall is
sloped to guide water towards the first opening;
electrical connection box.

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