CN108242790B - Electrical connection box and wire harness - Google Patents

Abstract

An object of the present invention is to provide an electrical junction box and a wire harness capable of improving waterproofness. The electrical junction box (1) has a first box body part (3) and a second box body part (4). The first box part (3) forms a double wall with a first inner wall (31) and a first outer wall (32). In the installed state of the box (2), the second outer wall (42) of the second box member (4) located between the first inner wall (31) and the first outer wall (32) is formed to face the upper end portion of the second outer wall (42). The first outer wall (32) is a curved portion (43) that is bent downward on the outer wall opposing surface (32a) side and downward.

Description

Electrical junction boxes and wiring harnesses

technical field

The present invention relates to an electrical junction box and a wiring harness.

Background technique

An electrical junction box (also called a junction box, fuse box, A relay box etc.) are installed in a space part, such as an engine room, for example.

An electrical junction box generally constitutes a box by stacking a plurality of box members. Therefore, in order to prevent liquid from infiltrating the inside of the case from the outside between the stacked case members, the case body is provided with a waterproof structure on one of the case members and the other case member. The waterproof structure described above is constituted by forming a double wall having an inner wall and an outer wall in one case member, and inserting and assembling the outer wall of the other case member between the inner wall and the outer wall of the one case member. For example, in the case of a waterproof structure in an electrical junction box whose box has a box body and a lower cover arranged on the lower side of the box body, the peripheral wall of the box body is configured as a double wall structure of an outer wall and an inner wall, and the When attaching the lower cover to the case body, a distal end portion of the outer wall of the lower cover is inserted between the outer wall and the inner wall of the case body (see Patent Document 1).

prior art literature

Patent Literature

Patent Document 1: Japanese Patent Laid-Open No. 2014-236654

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention

However, when cleaning the engine room in which the above-mentioned electrical junction box is installed, the high-pressure liquid strongly collides with the box. For example, when the liquid strongly collides with the case from below to the side, a part of the liquid infiltrates between the inner wall and the outer wall of the case main body from the boundary between the case main body and the lower cover, and may further infiltrate the inner wall of the case body. interior space. Therefore, it is desired to improve the waterproofness of the electrical junction box.

The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide an electrical junction box and a wire harness capable of improving waterproofness.

technical means to solve the problem

In order to achieve the above object, the electrical junction box according to the present invention is characterized by comprising: a first box member, at least a part of a box housing electronic components; and a second box member, a part of the box is located on the lower side of the first box member in the installed state of the box body, and a closure is formed on the lower side opening portion of the lower side end portion of the first box member, wherein the The first case member is formed along the lower side opening to form a double wall having a first inner wall and a first outer wall, and the second case member is formed so as to be positioned between the first inner wall and the first outer wall in the installed state. A second outer wall between the first outer walls, the second outer wall forms a curved portion at the upper end portion in the installed state, and the curved portion faces the first inner wall of the first outer wall. The outer wall opposing surface side and the lower side are bent to the side.

Further, in the above-mentioned electrical junction box, it is preferable that the second box member has a second inner wall formed along the second outer wall on the inner side of the second outer wall, and in the installed state, the A lower end portion of the first inner wall is located between the second outer wall and the second inner wall.

Further, in the above-mentioned electrical junction box, preferably, the first box member is disposed between the first inner wall and the first outer wall, and the first inner wall and the first outer wall are connected at both ends, respectively. The connecting plate of the first outer wall is formed along the lower side opening portion while dividing the space portion between the first inner wall and the first outer wall into two in the vertical direction.

Further, in the above-mentioned electrical junction box, preferably, the first box member has at least one latched portion formed on an inner wall facing surface of the first inner wall facing the first outer wall, so that At least one locking claw is formed on the second outer wall of the second case member, which is positioned between the first inner wall and the first outer wall and is engaged with the locked portion in the installed state. and the first outer wall forms an opening at a position facing the locking pawl engaged with the locked portion in the installed state.

In addition, in order to achieve the above object, the wire harness according to the present invention is characterized by comprising: an electric wire; and an electrical junction box having: a first box member that is at least a part of a box that accommodates electronic components; and a second box A member is a part of the casing, is located on the lower side of the first casing member in the installation state of the casing, and is closed at the end portion of the lower side of the first casing member. A lower side opening, wherein the first case member is formed along the lower side opening with a double wall having an inner wall (first inner wall) and an outer wall (first outer wall), and the second case member is formed in The lower peripheral wall (second outer wall) located between the inner wall (first inner wall) and the outer wall (first outer wall) in the installation state, and the lower peripheral wall (second outer wall) in the installation state The upper end portion forms a curved portion that is bent downward toward the outer wall opposing surface side facing the inner wall (first inner wall) of the outer wall (first outer wall).

Further, in the above-mentioned wire harness, it is preferable that the second case member has a second inner wall formed along the lower peripheral wall (second outer wall) on the inner side of the lower peripheral wall (second outer wall), In the installation state, the lower end portion of the inner wall (first inner wall) is located between the lower peripheral wall (second outer wall) and the second inner wall.

In the above-mentioned wire harness, it is preferable that the first case member includes the inner wall which is arranged between the inner wall (first inner wall) and the outer wall (first outer wall) and has both ends connected to the inner wall, respectively. (first inner wall) and a connecting plate of the outer wall (first outer wall) that divides the space between the inner wall (first inner wall) and the outer wall (first outer wall) in the up-down direction It is two, and is formed along the said lower side opening part.

Further, in the above-mentioned wire harness, preferably, the first case member forms at least one or more latched on an inner wall opposing surface of the inner wall (first inner wall) facing the outer wall (first outer wall). A stop portion is formed on the lower peripheral wall (second outer wall) of the second case member, at least one of which is located between the inner wall (first inner wall) and the outer wall (first outer wall) in the installed state a locking claw engaged with the locked portion, the outer wall (first outer wall) is at a position facing the locking claw engaged with the locked portion in the installed state An opening is formed.

Invention effect

The electrical junction box according to the present invention is formed on the upper end portion of the second outer wall of the second box member and faces the outer wall opposing surface side and downward direction facing the first inner wall in the installed state of the box. The curved portion formed in a side-curved manner is located between the first inner wall and the first outer wall of the first case member, so that liquid can be suppressed from infiltrating between the first inner wall and the first outer wall, and infiltration into the case can be suppressed, Therefore, the waterproofness can be improved.

Description of drawings

FIG. 1 is a perspective view showing an electrical junction box according to the embodiment.

2 is an exploded perspective view of the electrical junction box according to the embodiment.

3 is a cross-sectional view of a main part of a box of the electrical junction box according to the embodiment.

4 is a cross-sectional view of a main part of a box of the electrical junction box according to the embodiment.

5 is a perspective view of a main part of a box of the electrical junction box according to the embodiment.

Description of reference numerals

1: Electrical junction box

2: Shell

2a: Internal space section

3: Box body (first box body part)

3a: Internal space section

3b: Lower side opening

3c: Upper side opening

3d: Space Department

31: The first inner wall

31a: Opposite surface of inner wall

32: First outer wall

32a: Opposite surface of outer wall

32b: Opening

33: Link Board

34: Locked part

4: Lower cover (second box part)

4a: Internal Space Department

4b: Upper side opening

4c: Space Department

41: Second inner wall

42: Second outer wall

43: Bending part

43a: Inclined surface

44: End part

44a: Opposite surface of end portion

45: Locking claw

5: upper cover

5a: Internal Space Department

51: Outer Wall

52: inner wall

53: Bottom side end

100: Harness

101: Wire

200: Electronic Components

Detailed ways

Hereinafter, embodiments of the electrical junction box and the wire harness according to the present invention will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited to the content limited by this embodiment. In addition, the constituent elements of the following embodiments include elements that can be easily conceived by those skilled in the art or elements that are substantially the same. In addition, various omissions, substitutions, and changes can be made to the constituent elements in the following embodiments without departing from the gist of the invention.

[Embodiment]

First, the electrical junction box and the wire harness according to the embodiment will be described. FIG. 1 is a perspective view showing an electrical junction box according to the embodiment. 2 is an exploded perspective view of the electrical junction box according to the embodiment. 3 is a cross-sectional view of a main part of a box of the electrical junction box according to the embodiment. FIG. 3 is an A-A sectional view of FIG. 1 . Here, FIG. 3 is a partial enlarged view of the cross section of the box body and the lower cover. 4 is a cross-sectional view of a main part of a box of the electrical junction box according to the embodiment. FIG. 4 is an A-A sectional view of FIG. 1 . Here, FIG. 4 is a partial enlarged view of the cross section of the case body and the upper cover. 5 is a perspective view of a main part of a box of the electrical junction box according to the embodiment. Here, FIG. 5 is an enlarged view of part B in FIG. 1 , and is a partial enlarged view of the case main body and the lower cover. Here, the X direction of each drawing is the width direction of the electrical junction box in this embodiment. The Y direction is the thickness direction of the electrical junction box in the present embodiment, and is a direction orthogonal to the width direction. The Y1 direction is the near direction. The Y2 direction is the far-reaching direction. The Z direction is the vertical direction of the electrical junction box in the present embodiment, and is a direction orthogonal to the width direction and the thickness direction. In addition, the Z direction is the lamination direction of the box members of the electrical junction box in the present embodiment. The Z1 direction is the upward direction. The Z2 direction is the downward direction.

The electrical junction box 1 in the present embodiment is mounted on a vehicle such as an automobile, and distributes electric power supplied from a power source such as a battery to various electronic devices mounted on the vehicle through various electronic components and the like. As shown in FIG. 1 and FIG. 2 , the electrical junction box 1 is assembled to a wire harness 100, and collects and accommodates electronic components 200 such as connectors, fuses, relays, branches, and electronic control units that constitute connection processing components such as electric wires 101. Components inside. The electrical junction box 1 of the present embodiment is installed in a place exposed to the external environment, such as an engine room of a vehicle, and is connected between a power source such as a battery and various electronic devices mounted in the vehicle. In addition, although the electrical junction box 1 may be called a junction box, a fuse box, a relay box, etc., in this embodiment, these are collectively called an electrical junction box. As shown in FIG. 1 , the electrical junction box 1 includes a box 2 composed of a plurality of box members. In the electrical junction box 1 of the present embodiment, the vehicle mounting portion provided on the outer side of the box 2 is brought into contact with the mounting panel on the vehicle side and the like, and the vehicle mounting portion and the mounting panel on the vehicle side are coupled with a connecting member such as a bolt. set in the vehicle. In the installed state of the box 2 installed in the engine room of the vehicle, the electrical junction box 1 is installed so as to face the mounting panel on the vehicle side on its far-reaching direction (Y2 direction) side, and its near-direction (Y1 direction) side is exposed to the engine room. Department of Space. In addition, the electrical junction box 1 is installed on the vehicle so that the up-down direction (Z) is aligned with the vertical direction or at an arbitrary angle with the vertical direction.

As shown in FIG. 2 , the case 2 is formed in a box-like shape with insulating synthetic resin, and the electronic component 200 is accommodated in an internal space portion 2 a formed inside. Here, at least a part of the electronic component 200 is connected to the electric wire 101 inserted into the internal space portion 2a from an insertion hole formed in the case 2 . The box body 2 includes a box body 3, a lower cover 4, and an upper cover 5, and has a structure in which multiple layers (three layers) of the lower cover 4, the box body 3, and the upper cover 5 are stacked in this order from the lower side, that is, It has a structure divided into a plurality of box members.

The case main body 3 is a first case member, and is a part of the case 2 . As shown in FIGS. 1 and 2 , in the installed state, the outer peripheral shape of the case body 3 is formed in a substantially rectangular shape when viewed from the up-down direction. The box main body 3 has an inner space portion 3a. The inner space portion 3 a is a part of the inner space portion 2 a of the case 2 . In the installed state, the box main body 3 has a lower opening 3b formed at the lower end and an upper opening 3c formed at the upper end. The box main body 3 is formed in the hollow shape which the lower side opening part 3b and the upper side opening part 3c communicate with each other via the internal space part 3a in the up-down direction. The internal space 3a of the box body 3 according to the present embodiment is divided into a plurality of regions, and a box containing electronic components 200 such as a fuse box and electronic components 200 are directly inserted into the divided spaces and held. The box body 3 includes a first inner wall 31 , a first outer wall 32 , a connecting plate 33 , and a locked portion 34 .

The first inner wall 31 is formed continuously along the lower side opening 3b and the upper side opening 3c, and is a member that forms the outer peripheral shape of the box body 3 . The first inner wall 31 is formed to extend in the vertical direction from the lower side opening 3b to the upper side opening 3c. The first outer wall 32 is formed to face the first inner wall 31 on the outside of the first inner wall 31 , that is, on the outer space side of the case 2 . The first outer wall 32 is formed so as to extend from the lower side opening 3b to the upper side opening 3c in the vertical direction on the front direction side of the case body 3 . The box main body 3 is formed with a double wall having a first inner wall 31 and a first outer wall 32 along the lower side opening 3b. In the case main body 3 of the present embodiment, the front direction side of the peripheral wall of the case main body 3 is a double wall by the first inner wall 31 and the first outer wall 32 . A space portion 3 d is formed between the first inner wall 31 and the first outer wall 32 . The space portion 3d is formed to communicate from the upper end portion to the lower end portion of the first inner wall 31 and the first outer wall 32, and to communicate with the outside of the box body 3 at the upper end portion and the lower end portion. The first inner wall 31 has an inner wall facing surface 31 a facing the first outer wall 32 . The first outer wall 32 has an outer wall facing surface 32 a facing the first inner wall 31 . The inner wall opposing surface 31a and the outer wall opposing surface 32a are surfaces exposed to the space portion 3d.

In the installed state, the first outer wall 32 has an opening 32b formed at a position corresponding to a locking claw 45 to be engaged with the locked portion 34 described later. A part of the 1st outer wall 32 is formed so that it may protrude toward the front direction side with respect to the opening part 32b so that the upper side of the opening part 32b may be covered. The opening portion 32b is formed so as to communicate with the external space of the case 2 and the space portion 3d. The opening portion 32b is formed in the width direction so that the upper end portion of the locking claw 45 is exposed to the outer space of the case 2 . In the vertical direction, the lower end portion of the opening portion 32 b exposes the locking claw 45 to the outer space of the case 2 , and the upper end portion is formed up to the upper side opening portion 3 c of the case body 3 . Therefore, in this formation process, the opening part 32b can be formed simultaneously with the case main body 3 by using the mold|die which is divided in the up-down direction.

As shown in FIG. 4 , the connecting plate 33 is a member that divides the space portion 3d into two in the vertical direction. The connecting plate 33 is arranged in the space portion 3d, and both end portions are connected to the first inner wall 31 and the first outer wall 32, respectively. The connecting plate 33 is formed on the upper side of the first inner wall 31 and the first outer wall 32 . The connecting plate 33 is formed along the lower side opening 3b on the front side of the peripheral wall of the box body 3, that is, the region where the double wall is formed. When the connection plate 33 is seen from the upper direction, the area|region in which the opening part 32b is formed is notched. The connecting plate 33 is formed parallel to a plane (horizontal plane) orthogonal to the vertical direction. The connecting plate 33 includes a lower end surface 33a and an upper end surface 33b that are opposed to each other in the vertical direction.

As shown in FIGS. 2 and 5 , the locked portion 34 is a member engaged with a locking claw 45 of the lower cover 4 to be described later in the installed state. At least one or more to-be-locked portions 34 are formed on the inner wall facing surface 31 a of the first inner wall 31 . The locked portion 34 holds the locking claw 45 accommodated in the locked portion 34 by sandwiching the locking claw 45 accommodated in the locked portion 34 in the thickness direction by the inner wall opposing surface 31 a and the outer wall opposing surface 32 a , and is held in a state where the locking claw 45 is engaged. Therefore, the to-be-locked portion 34 is formed in a size capable of accommodating the locking pawl 45 .

The lower cover 4 is the second case member and is a part of the case 2 . In the installed state, the lower cover 4 is located on the lower side of the case main body 3 , and is a member that closes the lower side opening 3 b of the case main body 3 . When viewed from the up-down direction, the outer peripheral shape of the lower cover 4 is formed in a substantially rectangular shape which is the same (including substantially the same) as the outer peripheral shape of the case body 3 . The lower cover 4 has an inner space portion 4a. The inner space portion 4a is a part of the inner space portion 2a of the case 2 . The lower cover 4 is formed with an upper opening 4b at an upper end. The lower cover 4 is formed in a tray shape (tray shape) that communicates the inner space portion 4a and the upper side opening portion 4b. The lower cover 4 is locked to the case main body 3 in a state where the upper side opening 4b is opposed to the lower side opening 3b of the case main body 3 in the vertical direction in a state assembled to the case main body 3 .

The lower cover 4 has a second inner wall 41 , and a second outer wall 42 , which is formed along the second inner wall 41 on the outside of the second inner wall 41 , that is, on the outer space side of the case 2 . The second inner wall 41 is continuously formed along the upper side opening 4b, and forms the outer peripheral shape of the lower cover 4 as the peripheral wall of the lower cover 4 . The second inner wall 41 protrudes from the bottom portion located at the lower end portion of the lower cover 4 , and is formed to extend in the vertical direction to the upper opening portion 4 b. The lower cover 4 has a second outer wall 42 formed along the second inner wall 41 on the outside of the second inner wall 41 , that is, on the outer space side of the case 2 . The second outer wall 42 is formed along the second inner wall 41 in a part of the front direction side of the case main body 3 and the far side direction side of the case main body 3 . In the installed state, the second outer wall 42 is located between the first inner wall 31 and the first outer wall 32, that is, in the space portion 3d. A space portion 4 c is formed between the second inner wall 41 and the second outer wall 42 . In the installed state, the space portion 4c communicates with the space portion 3d of the cartridge body 3 and the interior space portion 2a of the case 2 . In the installed state, the space portion 4c is located at the lower end portion of the first inner wall 31 .

In the installed state, the upper end portion of the second outer wall 42 is formed with a curved portion 43 that is bent downward toward the outer wall opposing surface 32 a side of the first outer wall 32 . That is, by forming the curved portion 43, the upper end portion of the second outer wall 42 including the distal end portion 44 closes the space portion 3d in the obliquely downward direction toward the outer wall opposing surface 32a, and the space portion 3d is connected to the outer space of the case 2. block. The second outer wall 42 is formed with a curved portion 43 to form an inclined surface 43a which is inclined downward from the inner wall opposing surface 31a toward the outer wall opposing surface 32a. In the installed state, the inclined surface 43 a is an end surface located on the lower side, and is a surface exposed to the outer space side of the case 2 . A distal end opposing surface 44 a is formed at the distal end portion 44 of the second outer wall 42 . The distal end portion opposing surface 44a faces the outer wall opposing surface 32a of the first outer wall 32, and is formed to extend in the vertical direction. Here, in the installed state, the lower cover 4 is designed in consideration of dimensional tolerances due to the synthetic resin material constituting the lower cover 4 so that the end portion facing surface 44a and the outer wall facing surface 32a almost abut. The second outer wall 42 is formed so that the curved portion 43 can be elastically deformed when an external force is applied to the distal end portion 44 . Therefore, the second outer wall 42 exerts an external force such as liquid collision on the end portion 44 from the lower side, so that the curved portion 43 is bent, the end portion 44 is elastically deformed toward the first outer wall 32 side, and the end portion opposing surface 44a abuts against the outer wall opposing surface 32a catch. The second outer wall 42 forms the bent portion 43 so that the lower end portion of the distal end portion 44 is located in the same manner as or higher than the lower end portion of the first outer wall 32 in the installed state. In other words, the upper end portion of the second outer wall 42 that is curved by the curved portion 43 is located inside the space portion 3d.

The locking claw 45 is a member that holds the case main body 3 and the lower cover 4 in a state in which the case main body 3 and the lower cover 4 are locked in a state in which the lower cover 4 is attached to the case main body 3 . The locking claw 45 is formed on the second outer wall 42 , and is positioned in the space portion 3 d between the first inner wall 31 and the first outer wall 32 in the installed state, and is engaged with the locked portion 34 . The thickness of the locking claw 45 in the thickness direction is formed to be larger than the width in the thickness direction of the locked portion 34 between the inner wall opposing surface 31 a of the first inner wall 31 and the outer wall opposing surface 32 a of the first outer wall 32 . slightly larger. Therefore, the locking claw 45 is inserted into the space portion 3d between the inner wall opposing surface 31a and the outer wall opposing surface 32a in a press-fit state when the lower cover 4 is attached to the case body 3 . In order to facilitate insertion of the locking claw 45 into the locked portion 34 , the locking claw 45 is formed so as to be narrow in the thickness direction and the width direction with the upper end portion toward the upper side.

The upper cover 5 is a part of the box body 2 . The upper cover 5 is located on the upper side of the case main body 3 in the installed state, and is a member that closes the upper side opening 3 c of the case main body 3 . When viewed from the up-down direction, the outer peripheral shape of the upper cover 5 is formed in a substantially rectangular shape which is the same (including substantially the same) as the outer peripheral shape of the case body 3 . The upper cover 5 has an inner space portion 5a. The inner space portion 5a is a part of the inner space portion 2a of the case 2 . Therefore, the inner space portion 2a of the case 2 is constituted by the inner space portion 3a of the case body 3 , the inner space portion 4a of the lower cover 4 , and the inner space portion 5a of the upper cover 5 . The upper cover 5 has a lower side opening 5b formed at the lower side end. The upper cover 5 is formed in a cover shape, and is a cover shape in which the internal space portion 5a and the lower side opening portion 5b communicate with each other. When the upper cover 5 is assembled to the box body 3, it is provided on the side surface of the upper cover 5 in a state where the lower side opening 5b is opposed to the upper side opening 3c of the box body 3 in the vertical direction. The mechanism is locked to the cartridge body 3 . The upper cover 5 continuously forms a double wall having an outer wall 51 and an inner wall 52 along the lower side opening 5b. The outer wall 51 is formed so that the lower side end portion 53 protrudes to the lower side than the lower side end portion of the inner wall 52 . The upper end portion of the first inner wall 31 of the box body 3 is located between the outer wall 51 and the inner wall 52 in a state where the upper cover 5 is assembled to the box body 3 . In addition, at this time, the outer wall 51 is located in the inner space portion 3 a of the case main body 3 .

Next, the assembly procedure of the electrical junction box 1 according to the present embodiment will be described. First, the operator assembles the electric wires 101 into the submodules accommodated in the inner space portion 3a of the box body 3, respectively, to produce sub-harnesses. Next, the operator inserts the sub-modules into the interior space portion 3 a for each of the sub-harnesses from the lower side of the box body 3 , and fits and fixes the sub-modules and the like of the box body 3 . Next, the operator mounts the electronic component 200 on each module from the upper side of the box body 3 , and electrically connects the electronic component 200 and the electric wire 101 . Next, the operator places the lower cover 4 on the lower side of the box body 3 and inserts the second outer wall 42 of the lower cover 4 into the space portion 3d of the box body 3 from the lower side toward the upper side. At this time, at the same time, the locking claw 45 is inserted into the space portion 3d of the cartridge body 3 from the lower side toward the upper side. The locking claw 45 is in contact with the inner wall opposing surface 31a and the outer wall opposing surface 32a, and is inserted in a press-fit state while expanding so as to separate the first inner wall 31 and the first outer wall 32 from each other. At this time, at the same time, the lower end portion of the first inner wall 31 of the case body 3 is inserted into the space portion 4c of the lower cover 4 from the upper side toward the lower side. When the operator keeps inserting the lower cover 4 into the box body 3 with the lower cover 4 facing upward, and when the lower cover 4 cannot be moved upward any more, the assembly of the lower cover 4 with respect to the box body 3 is completed. At this time, the locking pawl 45 is sandwiched by the inner wall opposing surface 31a and the outer wall opposing surface 32a in the thickness direction. Therefore, the lower cover 4 can be held in a state assembled to the case body 3 . Next, the operator places the upper cover 5 on the upper side of the case main body 3 and inserts the outer wall 51 of the upper cover 5 into the space portion 3d of the case main body 3 from the upper side toward the lower side. At this time, at the same time, between the outer wall 51 and the inner wall 52 of the upper cover 5, the upper end portion of the first inner wall 31 of the box body 3 is inserted from the lower side toward the upper side. The operator continues to insert the upper cover 5 into the box body 3 toward the downward side, and when the upper cover 5 cannot be moved downward any more, the upper cover 5 is assembled to the box body 3 and the electrical junction box 1 is assembled.

Next, in the electrical junction box 1 according to the present embodiment, the liquid flow when the liquid (for example, water used for cleaning) collides with the box 2 from the outside will be described with reference to FIGS. 3 and 4 . When the high-pressure liquid goes from the lower side to the upper side with respect to the electrical junction box 1 , the high-pressure liquid collides with the lower side of the box 2 , that is, the lower cover 4 side. A part of the liquid that hits the boundary between the cartridge body 3 and the lower cover 4 advances toward the upper side toward the space portion 3d of the cartridge body 3 ( S1 ). The liquid infiltrated into the space portion 3d collides with the upper end portion of the second outer wall 42 which is bent by the bent portion 43 . The liquid colliding with the upper end portion is guided downward by the inclined surface 43a, and is discharged to the outer space of the housing 2 (S2). In addition, when the high-pressure liquid further collides with the inclined surface 43a, an external force is applied to the upward direction side of the inclined surface 43a. Therefore, the curved portion 43 of the second outer wall 42 is elastically deformed so that the distal end portion 44 faces upward, and the distal end portion opposing surface 44a reliably abuts on the outer wall opposing surface 32a. Thereby, the high-pressure liquid colliding with the inclined surface 43a is guided downward by the inclined surface 43a, and is prevented from infiltrating into the space portion 3d from between the distal end portion opposing surface 44a and the outer wall opposing surface 32a, and is discharged to the outer space of the casing 2 .

When a part of the liquid penetrates into the upper side of the curved portion 43 of the space portion 3 d and advances further upward ( S3 ), the liquid collides with the lower end surface 33 a of the connecting plate 33 . The liquid collided with the lower end surface 33a is guided to the lower side in the direction of its own weight in the space portion 3d (S4), and is directed to the outer space of the case 2 from between the distal end portion facing surface 44a and the outer wall surface facing surface 32a. discharge.

It should be noted that when the high-pressure liquid is directed from the upper side to the lower side with respect to the electrical junction box 1 , the high-pressure liquid collides with the upper side of the box 2 , that is, the upper cover 5 side. A part of the liquid at the boundary between the box body 3 and the upper cover 5 advances toward the lower side toward the space portion 3d of the box body 3 (S5). The liquid that has penetrated into the space portion 3 d collides with the upper end surface 33 b of the connecting plate 33 , partially bounces upward, and is discharged to the outer space of the case 2 . In addition, the other part stays on the connecting plate 33, flows on the connecting plate 33 as the amount of the liquid staying on the connecting plate 33 increases, falls from the cutout of the connecting plate 33 to the lower side, and is removed from the first outer wall. The opening 32b of 32 is discharged to the outer space of the case 2 .

As described above, in the electrical junction box 1 according to the present embodiment, in the installed state, the bent portion 43 formed at the upper end portion of the second outer wall 42 is located in the space portion 3d. The upper end portion of the second outer wall 42 curved by the curved portion 43 faces the outer wall opposing surface 32a side and the downward side of the first outer wall 32, and closes the space portion 3d in the oblique downward direction. For example, when the second outer wall 42 is provided with a curved portion formed along a direction orthogonal to the vertical direction, that is, the horizontal direction, the liquid that has penetrated into the space portion 3d collides with the second outer wall 42 and does not pass through the inclined surface and goes downward. Since the direction side is guided, there is a possibility of infiltration from the curved portion 43 to the upper side from the gap between the outer wall opposing surface 32 a and the second outer wall 42 . On the other hand, in the electrical junction box 1 of the present embodiment, the liquid that has penetrated into the space portion 3d collides with the upper end portion of the second outer wall 42 and is guided downward by the inclined surface 43a, so that the liquid can be suppressed from being trapped in the space. The portion 3d infiltrates upward from the curved portion 43, and can prevent liquid from infiltrating into the inner space 2a of the case 2 via the space 4c of the lower cover 4, thereby improving waterproofness.

In addition, in the electrical junction box 1 according to the present embodiment, the second outer wall 42 is formed so that the bent portion 43 can be elastically deformed, and the end portion 44 of the second outer wall 42 is formed with the outer wall facing surface 32 a of the first outer wall 32 . Opposed to each other, a distal end portion opposing surface 44a extending in the up-down direction is formed. When the liquid contacts the upper end portion of the second outer wall 42 and an upward external force is applied to the distal end portion 44, the curved portion 43 is elastically deformed, and the distal end portion opposing surface 44a and the outer wall opposing surface 32a reliably abut against each other. catch. When a higher pressure liquid collides, the curved portion 43 is more actively elastically deformed, and the abutting force increases in a state where the distal end portion opposing surface 44a and the outer wall opposing surface 32a are in contact, so even in the case of a high pressure liquid collision , the liquid can also be suppressed from infiltrating the space portion 3d. Moreover, the front-end|tip part opposing surface 44a of the electrical junction box 1 makes surface contact with the outer wall opposing surface 32a. The contact with the outer wall facing surface 32a improves the adhesion between the end portion facing surface 44a and the outer wall facing surface 32a in the electrical junction box 1 compared to the point contact, so that the liquid can be more reliably suppressed from infiltrating the space In addition, since penetration into the inner space portion 2a of the case 2 can be suppressed, the waterproofness can be improved.

In addition, in the installed state, the bent portion 43 is formed so that the distal end portion 44 of the second outer wall 42 is positioned on the same or higher side as the lower end portion of the first outer wall 32 . That is, the distal end portion opposing surface 44a is located in the space portion 3d, and the entire surface faces the outer wall opposing surface 32a. Therefore, it is possible to prevent the liquid from directly colliding with the distal end portion opposing surface 44a and infiltrating the space portion 3d upward from between the distal end portion opposing surface 44a and the outer wall opposing surface 32a. In addition, the liquid colliding with the second outer wall 42 can be positively guided to the lower side by the inclined surface 43a, so that the electrical junction box 1 can improve the waterproofness.

In addition, in the electrical junction box 1 according to the present embodiment, the upper end portion of the second outer wall 42 is bent downward by the bent portion 43 to form an inclination in the oblique downward direction. When the upper end portion of the second outer wall 42 is bent in the horizontal direction, when the lower cover 4 is attached to the case main body 3, the attachment position of the lower cover 4 to the case main body 3 is shifted, and the case main body 3 The lower end portion of the double wall is in contact with the horizontally curved region of the second outer wall 42, so it is difficult for the operator to insert the second outer wall 42 into the space portion 3d. On the contrary, in the electrical junction box 1, even when the installation position of the lower cover 4 with respect to the box body 3 is shifted, the second outer wall 42 is easily guided and inserted into the space portion 3d by the inclination of the curved portion 43, Therefore, the operator's burden when assembling the electrical junction box 1 can be reduced, and the productivity and reliability of the electrical junction box 1 can be improved.

In addition, in the electrical junction box 1 according to the present embodiment, the lower cover 4 has the second inner wall 41 , and the lower end portion of the first inner wall 31 is inserted between the second inner wall 41 and the second outer wall 42 in the installed state. space portion 4c between. That is, in the installed state, the second inner wall 41 is located inside the lower end of the first inner wall 31 (the inner space side of the case 2 ), so that the liquid penetrates into the space 3d and further penetrates into the second outer wall 42 and the inner wall. In the case between the placement surfaces 31a, the second inner wall 41 prevents the above-mentioned liquid from infiltrating the inner space portion 4a, so that the electrical junction box 1 can further improve the waterproofness.

Further, in the electrical junction box 1 according to the present embodiment, the box main body 3 includes the connecting plate 33 in the region where the double wall is formed, and the liquid infiltrating the space portion 3d above the curved portion 43 collides with the connecting plate 33 The lower end surface 33 a can be prevented from reaching the boundary between the first inner wall 31 and the first outer wall 32 and the lower end 53 of the outer wall 51 of the upper cover 5 . In addition, the liquid that has penetrated into the space portion 3d from the upper side can be prevented from colliding with the upper end surface 33b and entering the space portion 3d in the downward direction to reach the boundary between the first inner wall 31 and the second outer wall 42 . As described above, since the connection plate 33 is formed in the electrical junction box 1, the liquid that has penetrated into the space portion 3d can be prevented from infiltrating the inner space portion 2a of the box 2, so that the waterproofness can be improved.

In addition, both end portions of the connecting plate 33 are formed so as to be connected to the first inner wall 31 and the first outer wall 32, respectively. That is, since the connecting plate 33 is formed to intersect with the first inner wall 31 and the first outer wall 32 formed in the vertical direction, the bending of the first inner wall 31 and the first outer wall 32 is suppressed, and the durability of the box 2 of the electrical junction box 1 can be improved. rigidity.

In addition, in the electrical junction box 1 according to the present embodiment, the first outer wall 32 is formed with the opening 32b that exposes the locking pawl 45 engaged with the locked portion 34 to the outside in the installed state, so even if the Even with the configuration in which the first outer wall 32 is positioned outside the second outer wall 42 , the operator can confirm the engagement state between the locking pawl 45 and the locked portion 34 , and the reliability of the electrical junction box 1 can be improved.

In addition, the locking claw 45 inserts the first inner wall 31 and the first outer wall 32 into the space portion 3d while being separated from each other. That is, since the locking claw 45 is press-fitted into the space portion 3d, in the region of the second outer wall 42 where the locking claw 45 is formed, the liquid can be prevented from infiltrating the space portion 3d from the lower side. In addition, the locking claws 45 can prevent the liquid from infiltrating the space portion 3d from the lower side, so that even if the connecting plate 33 is not formed in the region where the locking claws 45 , that is, the locked portion 34 is formed, the liquid can be prevented from flowing from the upper cover 5 . The space between the outer wall 51 and the first inner wall 31 penetrates into the inner space 2a of the box body 2 . In addition, since the connecting plate 33 is not required in the region where the locked portion 34 is formed, the box body 3 can be integrally formed by a single mold that is divided in the vertical direction.

Since the wire harness 100 described above includes the electrical junction box 1, liquid can be suppressed from infiltrating between the first inner wall and the first outer wall, and can be suppressed from infiltrating the inside of the box, so that the waterproofness can be improved.

In the electrical junction box 1 in the present embodiment, although the double wall of the first inner wall 31 and the first outer wall 32 of the box body 3 is formed on the front direction side, it is not limited to this. For example, the electrical junction box 1 may be configured such that a double wall is formed over the entire circumference as the peripheral wall of the box main body 3 .

Claims (10)

1. An electrical junction box, characterized in that, comprising: a first case member that is at least a part of a case that houses electronic components; and The second case member is a part of the case, is located on the lower side of the first case member in the installed state of the case, and is closed on the first case member. The lower side opening of the lower side end portion, Wherein, the first box member forms a double wall having a first inner wall and a first outer wall along the lower side opening, the second case member forms a second outer wall between the first inner wall and the first outer wall in the set state, In the installed state, the second outer wall is formed with a curved portion at the upper end portion, and the curved portion is curved toward the side of the outer wall opposing surface of the first outer wall facing the first inner wall and toward the lower side. . 2. The electrical junction box of claim 1, wherein, The second case member has a second inner wall formed along the second outer wall on the inner side of the second outer wall, The lower end portion of the first inner wall is located between the second outer wall and the second inner wall in the set state. 3. The electrical junction box of claim 1, wherein, The first case member includes a connecting plate arranged between the first inner wall and the first outer wall and connecting the first inner wall and the first outer wall at both ends, respectively, The connecting plate divides the space between the first inner wall and the first outer wall into two in the vertical direction, and is formed along the lower opening. 4. The electrical junction box of claim 2, wherein, The first case member includes a connecting plate arranged between the first inner wall and the first outer wall and connecting the first inner wall and the first outer wall at both ends, respectively, The connecting plate divides the space between the first inner wall and the first outer wall into two in the vertical direction, and is formed along the lower opening. 5. The electrical junction box according to any one of claims 1 to 4, wherein: The first case member forms at least one or more latched portions on an inner wall facing surface of the first inner wall facing the first outer wall, The second case member forms at least one latch on the second outer wall that is positioned between the first inner wall and the first outer wall and is engaged with the latched portion in the installed state claw, In the installed state, the first outer wall forms an opening at a position facing the locking pawl engaged with the locked portion. 6. A wire harness, characterized in that, comprising: wires; and An electrical junction box including: a first box member that is a part of a box housing at least electronic components; and a second box member that is a part of the box and is located in the box in the installed state of the box the lower side of the first case member, and a closure is formed on the lower side opening portion of the lower side end portion of the first case member, Wherein, the first box member forms a double wall having an inner wall and an outer wall along the lower side opening, The second case member is formed on a lower side peripheral wall located between the inner wall and the outer wall in the installed state, In the installation state, the lower peripheral wall is formed with a curved portion that is bent downward toward the outer wall opposing surface side of the outer wall facing the inner wall at an upper end portion of the outer wall. 7. The wiring harness of claim 6, wherein, The second case member has a second inner wall formed along the lower peripheral wall on the inner side of the lower peripheral wall, In the installation state, the lower end portion of the inner wall is located between the lower peripheral wall and the second inner wall. 8. The wiring harness of claim 6, wherein, The first case member includes a connecting plate arranged between the inner wall and the outer wall and connecting the inner wall and the outer wall at both ends, respectively, The connection plate divides the space between the inner wall and the outer wall into two in the up-down direction, and is formed along the lower opening. 9. The wiring harness of claim 7, wherein: The first case member includes a connecting plate arranged between the inner wall and the outer wall and connecting the inner wall and the outer wall at both ends, respectively, The connecting plate divides the space between the inner wall and the outer wall into two in the up-down direction, and is formed along the lower opening. 10. The wire harness according to any one of claims 6 to 9, wherein In the first case member, at least one or more to-be-locked portions are formed on an inner wall facing surface of the inner wall facing the outer wall, At least one locking claw is formed on the lower peripheral wall of the second case member, which is positioned between the inner wall and the outer wall and is engaged with the locked portion in the installed state, The outer wall forms an opening at a position facing the locking pawl engaged with the locked portion in the installed state.

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