JP2018107948A - Electrical connection box and wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrical connection box and wire harness capable of improving waterproofness.SOLUTION: An electric connection box 1 includes a first housing member 3 and a second housing member 4. In the first housing member 3, a double wall having a first inner wall 31 and a first outer wall 32 is formed. In an installation state of a housing 2, a second outer wall 42 of the second housing member 4, which is positioned between the first inner wall 31 and the first outer wall 32, is provided with a bent part 43 that bends downward toward an outer wall opposing surface 32a of the first outer wall 32 at the upper end part.SELECTED DRAWING: Figure 3

Description

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

  Electrical connection box (junction box, fuse) that is mounted on a vehicle and collects various electronic component modules such as wire harnesses and other electronic components such as fuses, relays, and electronic control units. A box or a relay box is also installed in a space such as an engine room.

  The electrical junction box is usually configured by stacking a plurality of casing members. Therefore, the casing includes a waterproof structure in one and the other casing members in order to prevent liquid from entering the casing from the outside between the stacked casing members. In the waterproof structure, a double wall having an inner wall and an outer wall is formed on one casing member, and the outer wall of the other casing member is inserted and assembled between the inner wall and the outer wall of the one casing member. Consists of. For example, in a waterproof structure in an electrical junction box having a casing body and a lower cover disposed on the lower side of the casing body, the peripheral wall of the casing body is configured as a double wall structure of an outer wall and an inner wall. When the lower cover is assembled to the box body, the tip of the outer wall of the lower cover is inserted between the outer wall and the inner wall of the box body (see Patent Document 1).

JP 2014-236654 A

  By the way, when the engine room in which the electrical junction box is installed is washed, the high-pressure liquid strongly collides with the casing. For example, when the liquid strongly collides with the housing from the lower side, a part of the liquid enters between the inner wall and the outer wall of the housing body from the boundary between the housing body and the lower cover, and further inside the housing. There is a possibility of entering the 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, and an object thereof is to provide an electrical junction box and a wire harness that can improve waterproofness.

  In order to achieve the above object, an electrical junction box according to the present invention includes a first housing member that is at least a part of a housing that houses electronic components, a part of the housing, and the installation of the housing. A second housing member that is positioned on the lower side of the first housing member and closes the lower opening formed at the lower end of the first housing member, and The first casing member is formed with a double wall having a first inner wall and a first outer wall along the lower opening, and the second casing member has the first inner wall and the first wall in the installed state. A second outer wall is formed between the first outer wall and the second outer wall, at the upper end in the installed state, on the outer wall facing surface side facing the first inner wall of the first outer wall; and A bent portion that is bent downward is formed.

  In the electrical junction box, the second casing member has a second inner wall formed along the second outer wall inside the second outer wall, and the second outer wall and the second inner wall. It is preferable that a lower end portion of the first inner wall is located between the first inner wall and the first inner wall in the installed state.

  In the electrical junction box, the first casing member is disposed between the first inner wall and the first outer wall, and both ends thereof are coupled to the first inner wall and the first outer wall, respectively. Preferably, the connecting plate includes two spaces in the vertical direction between the first inner wall and the first outer wall, and is formed along the lower opening.

  In the electrical junction box, the first casing member has at least one engagement receiving portion formed on an inner wall facing surface of the first inner wall facing the first outer wall, and the second casing member is In the installed state, the second outer wall is formed with at least one or more locking claws that are positioned between the first inner wall and the first outer wall and engage with the locking receiving portion. The outer wall is preferably formed with an opening at a position facing the locking claw engaged with the locking receiving portion in the installed state.

  In order to achieve the above object, a wire harness according to the present invention includes an electric wire, a first housing member that is at least a part of a housing that houses an electronic component, and a part of the housing, A second housing member that is located on a lower side of the first housing member and closes a lower opening formed at a lower end portion of the first housing member in an installed state of the housing; An electrical junction box, wherein the first casing member is formed with a double wall having an inner wall and an outer wall along the lower opening, and the second casing member is in the installed state. A lower side peripheral wall is formed between the inner wall and the outer wall, and the lower side peripheral wall is, on the upper side end, in the installed state, on the outer wall facing surface side facing the inner wall of the outer wall, and below A bent portion that is bent toward the direction side is formed.

  The electrical junction box according to the present invention is formed at the upper end of the second outer wall of the second casing member between the first inner wall and the first outer wall of the first casing member in the installed state of the casing. And the liquid is infiltrated between the first inner wall and the first outer wall by positioning the bent portion formed by bending toward the outer wall facing surface side facing the first inner wall and downward. Can be suppressed, and entry into the housing can be suppressed, so that waterproofness can be improved.

FIG. 1 is a perspective view showing an electrical junction box according to the embodiment. FIG. 2 is an exploded perspective view of the electrical junction box according to the embodiment. Drawing 3 is an important section sectional view of the case of the electric junction box concerning an embodiment. FIG. 4 is a cross-sectional view of a main part of the casing of the electrical junction box according to the embodiment. FIG. 5 is a perspective view of a main part of a housing of the electrical junction box according to the embodiment.

  Hereinafter, embodiments of an electrical junction box and a wire harness according to the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same. The constituent elements in the following embodiments can be variously omitted, replaced, and changed 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. FIG. 2 is an exploded perspective view of the electrical junction box according to the embodiment. Drawing 3 is an important section sectional view of the case of the electric junction box concerning an embodiment. 3 is a cross-sectional view taken along the line AA in FIG. Here, FIG. 3 is a partially enlarged view of a cross section of the box body and the lower cover. FIG. 4 is a cross-sectional view of a main part of the casing of the electrical junction box according to the embodiment. 4 is a cross-sectional view taken along line AA in FIG. Here, FIG. 4 is a partially enlarged view of a cross section of the box body and the upper cover. FIG. 5 is a perspective view of a main part of a housing of the electrical junction box according to the embodiment. Here, FIG. 5 is an enlarged view of a portion B in FIG. 1, and is a partially enlarged view of the box body and the lower cover. Here, the X direction of each figure is the width direction of the electrical junction box in the present embodiment. The Y direction is the thickness direction of the electrical junction box in the present embodiment, and is the direction orthogonal to the width direction. The Y1 direction is the front direction. The Y2 direction is the depth 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. The Z direction is the stacking direction of the casing members of the electrical junction box in this embodiment. The Z1 direction is the upward direction. The Z2 direction is the downward direction.

  The electrical junction box 1 in this embodiment is mounted on a vehicle such as an automobile, and distributes power supplied from a power source such as a battery to various electronic devices mounted on the vehicle via various electronic components. Is. As shown in FIGS. 1 and 2, the electrical junction box 1 is an electronic component such as a connector, a fuse, a relay, a branching unit, or an electronic control unit that is incorporated in the wire harness 100 and constitutes a connection processing component such as the electric wire 101. 200 are collected and accommodated inside. The electrical junction box 1 in this embodiment is installed in a place exposed to an 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. . The electrical connection box 1 may be called a junction box, a fuse box, a relay box, or the like. In the present embodiment, these are collectively called an electrical connection box. As shown in FIG. 1, the electrical junction box 1 includes a housing 2 composed of a plurality of housing members. In the electrical connection box 1 in this embodiment, a vehicle attachment portion provided outside the housing 2 is brought into contact with a vehicle-side attachment panel or the like, and the vehicle attachment portion and the vehicle-side attachment panel are connected by a fastening member such as a bolt. By being fastened, it is installed in the vehicle. The electrical connection box 1 is mounted with the depth direction (Y2 direction) side facing the mounting panel on the vehicle side in the installed state of the housing 2 installed in the engine room of the vehicle, and the front direction (Y1 direction) side is the engine side. Exposed in the room space. The electrical junction box 1 is installed in the vehicle such that the vertical direction (Z) coincides with the vertical direction or is at an arbitrary angle with respect to the vertical direction.

  As shown in FIG. 2, the housing 2 is formed in a box shape from an insulating synthetic resin, and houses the electronic component 200 in an internal space 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 2 a from the insertion hole formed in the housing 2. The housing 2 includes a box body 3, a lower cover 4, and an upper cover 5, and a structure in which a plurality of layers (three layers) are laminated in the order of the lower cover 4, the box body 3, and the upper cover 5 from the lower side. That is, it has a structure divided into a plurality of housing members.

  The box body 3 is a first housing member and is a part of the housing 2. As shown in FIGS. 1 and 2, the box body 3 has a substantially rectangular outer peripheral shape when viewed from above in the installed state. The box body 3 has an internal space 3a. The internal space portion 3 a is a part of the internal space portion 2 a of the housing 2. In the installed state, the box body 3 is formed with a lower opening 3b at the lower end and an upper opening 3c at the upper end. The box body 3 is formed in a hollow shape in which the lower opening 3b and the upper opening 3c communicate with each other through the internal space 3a in the vertical direction. In the box body 3 according to the present embodiment, the internal space portion 3a is divided into a plurality of sections, and a box containing the electronic component 200 such as a fuse box or the electronic component 200 is directly inserted into the partitioned space section. And retained. The box body 3 includes a first inner wall 31, a first outer wall 32, a connecting plate 33, and a latch receiving portion 34.

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

  The first outer wall 32 has an opening 32b at a position corresponding to a locking claw 45 engaged with a locking receiving portion 34 described later in the installed state. A part of the first outer wall 32 protrudes toward the front side with respect to the opening 32b so as to cover the upper side of the opening 32b. The opening 32b is formed to communicate the external space of the housing 2 with the space 3d. The opening 32 b is formed in such a size that the upper end portion of the locking claw 45 is exposed to the external space of the housing 2 in the width direction. In the vertical direction, the opening 32 b has a lower end that exposes the locking claw 45 to the external space of the housing 2, and an upper end that extends to the upper opening 3 c of the box body 3. Therefore, the opening 32b can be formed at the same time as the box body 3 by using a mold that is divided in the vertical direction in the forming step.

  As shown in FIG. 4, the connecting plate 33 divides the space 3 d into two in the vertical direction. The connecting plate 33 is disposed in the space 3d, and both ends thereof are connected to the first inner wall 31 and the first outer wall 32, respectively. The connecting plate 33 is formed above the first inner wall 31 and the first outer wall 32. The connecting plate 33 is formed along the lower opening 3b in the front direction side of the peripheral wall of the box body 3, that is, in the region where the double wall is formed. The connecting plate 33 is notched in a region where the opening 32b is formed when viewed from above. The connecting plate 33 is formed in parallel with a plane (horizontal plane) orthogonal to the vertical direction. The connecting plate 33 includes a lower side end surface 33a and an upper side end surface 33b facing each other in the vertical direction.

  As shown in FIGS. 2 and 5, the locking receiving portion 34 is engaged with a locking claw 45 of the lower cover 4 described later in the installed state. At least one or more locking receiving portions 34 are formed on the inner wall facing surface 31 a of the first inner wall 31. The latch receiving portion 34 is engaged with the latch claw 45 by holding the latch claw 45 accommodated in the latch receiving portion 34 in the thickness direction between the inner wall facing surface 31a and the outer wall facing surface 32a. Hold. Therefore, the latch receiving portion 34 is formed in a size that can accommodate the latching claws 45.

  The lower cover 4 is a second housing member and is a part of the housing 2. The lower cover 4 is located on the lower side of the box body 3 in the installed state, and closes the lower side opening 3b of the box body 3. The lower cover 4 is formed in a substantially rectangular shape whose outer peripheral shape is the same (including substantially the same) as the outer peripheral shape of the box body 3 when viewed from the vertical direction. The lower cover 4 has an internal space 4a. The internal space part 4 a is a part of the internal space part 2 a of the housing 2. The lower cover 4 has an upper opening 4b at the upper end. The lower cover 4 is formed in a dish shape (tray shape) in which the internal space 4a and the upper opening 4b communicate with each other. The lower cover 4 is locked to the box body 3 in a state where the upper side opening 4b is opposed to the lower side opening 3b of the box body 3 in the vertical direction in a state where the lower cover 4 is assembled to the box body 3.

  The lower cover 4 includes a second inner wall 41 and a second outer wall 42 formed along the second inner wall 41 on the outer side of the second inner wall 41, that is, on the outer space side of the housing 2. The second inner wall 41 is formed continuously along the upper opening 4 b 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 located at the lower end of the lower cover 4 and extends in the vertical direction to the upper opening 4b. The lower cover 4 has a second outer wall 42 formed along the second inner wall 41 on the outer side of the second inner wall 41, that is, on the outer space side of the housing 2. The second outer wall 42 is formed along the second inner wall 41 on the near side in the box body 3 and on a part in the depth direction side of the box 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 3d. A space portion 4 c is formed between the second inner wall 41 and the second outer wall 42. The space portion 4 c communicates with the space portion 3 d of the box body 3 and the internal space portion 2 a of the housing 2 in the installed state. The space 4c is located at the lower end of the first inner wall 31 in the installed state.

  In the installed state, the second outer wall 42 is formed with a bent portion 43 that bends toward the outer wall facing surface 32a side of the first outer wall 32 and toward the lower side at the upper end portion. That is, the second outer wall 42 is formed with the bent portion 43 so that the upper side end portion including the distal end portion 44 blocks the space portion 3d obliquely downward toward the outer wall facing surface 32a. The external space of the body 2 is blocked. As the second outer wall 42 is formed with the bent portion 43, an inclined surface 43a is formed which is inclined downward from the inner wall facing surface 31a toward the outer wall facing surface 32a. The inclined surface 43 a is an end surface located on the lower side in the installed state, and is a surface exposed to the external space side of the housing 2. A tip portion facing surface 44 a is formed at the tip portion 44 of the second outer wall 42. The front-end | tip part opposing surface 44a opposes the outer wall opposing surface 32a of the 1st outer wall 32, and is extended and formed along an up-down direction. Here, the lower cover 4 is designed in consideration of the dimensional tolerance due to the synthetic resin material constituting the lower cover 4 so that the front end facing surface 44a and the outer wall facing surface 32a substantially come into contact with each other in the installed state. The second outer wall 42 is formed so that the bent portion 43 can be elastically deformed when an external force is applied to the distal end portion 44. Accordingly, the second outer wall 42 is subjected to an external force such as a liquid colliding with the tip portion 44 from below, whereby the bent portion 43 is bent, and the tip portion 44 is elastically deformed toward the first outer wall 32 side. The tip portion facing surface 44a and the outer wall facing surface 32a abut. The second outer wall 42 is formed with a bent portion 43 so that the lower end portion of the distal end portion 44 is located on the upper side or the lower end portion of the first outer wall 32 in the installed state. The That is, the upper side end portion of the second outer wall 42 bent by the bent portion 43 is positioned inside the space portion 3d.

  The locking claw 45 holds the box body 3 and the lower cover 4 in a locked state when the lower cover 4 is assembled to the box body 3. The locking claw 45 is formed on the second outer wall 42, is located in the space 3 d between the first inner wall 31 and the first outer wall 32 in the installed state, and engages with the locking receiving portion 34. The thickness of the locking claw 45 in the thickness direction is slightly larger than the width in the thickness direction of the inner wall facing surface 31a of the first inner wall 31 and the outer wall facing surface 32a of the first outer wall 32 in the locking receiving portion 34. Is done. Accordingly, when the lower cover 4 is assembled to the box body 3, the locking claw 45 is inserted between the inner wall facing surface 31a and the outer wall facing surface 32a, that is, in the space portion 3d in a press-fitted state. The locking claw 45 is formed so that the upper end portion is narrowed toward the upper side in the thickness direction and the width direction so that the locking claw 45 can be easily inserted into the locking receiving portion 34. The

  The upper cover 5 is a part of the housing 2. The upper cover 5 is located above the box body 3 in the installed state, and closes the upper opening 3c of the box body 3. The upper cover 5 is formed in a substantially rectangular shape whose outer peripheral shape is the same (including substantially the same) as the outer peripheral shape of the box body 3 when viewed from above and below. The upper cover 5 has an internal space 5a. The internal space part 5 a is a part of the internal space part 2 a of the housing 2. Therefore, the internal space 2 a of the housing 2 is constituted by the internal space 3 a of the box body 3, the internal space 4 a of the lower cover 4, and the internal space 5 a of the upper cover 5. The upper cover 5 has a lower opening 5b at the lower end. The upper cover 5 is formed in a lid shape in which the internal space 5a communicates with the lower opening 5b. The upper cover 5 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 main body 3 in the vertical direction in a state where the upper cover 5 is assembled to the box main body 3. The box body 3 is locked by the locking mechanism. In the upper cover 5, a double wall having an outer wall 51 and an inner wall 52 is formed continuously along the lower opening 5b. The outer wall 51 is formed such that the lower end 53 projects downward from the lower end of the inner wall 52. In the state where the upper cover 5 is assembled to the box body 3, the upper end of the first inner wall 31 of the box body 3 is located between the outer wall 51 and the inner wall 52. At this time, the outer wall 51 is located in the inner space 3 a of the box body 3.

  Next, the assembly procedure of the electrical junction box 1 according to the present embodiment will be described. First, the worker assembles the electric wires 101 into the sub-blocks accommodated in the internal space 3a of the box body 3 to produce a sub-harness. Next, the worker inserts the sub-block together with the sub-harness into the internal space 3a from the lower side of the box main body 3, and fits and fixes it to the block mounting member of the box main body 3 or the like. Next, the worker mounts the electronic component 200 on each block from above the box body 3 and electrically connects the electronic component 200 and the electric wire 101. Next, the worker 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 3 d of the box body 3 from the lower side to the upper side. At the same time, the locking claw 45 is inserted into the space portion 3d of the box body 3 from the lower side to the upper side. The locking claw 45 is inserted in a press-fit state while being in contact with the inner wall facing surface 31a and the outer wall facing surface 32a and pushing the first inner wall 31 and the first outer wall 32 apart from each other. At the same time, the lower end of the first inner wall 31 of the box body 3 is inserted into the space 4c of the lower cover 4 from the upper side toward the lower side. When an operator continues to insert the lower cover 4 upward into the box body 3 and the lower cover 4 can no longer be moved upward, the assembly of the lower cover 4 to the box body 3 is completed. To do. At this time, the locking claw 45 is sandwiched between the inner wall facing surface 31a and the outer wall facing surface 32a in the thickness direction. Therefore, the lower cover 4 can be held in a state assembled to the box body 3. Next, the worker places the upper cover 5 on the upper side of the box body 3 and inserts the outer wall 51 of the upper cover 5 into the space 3 d of the box body 3 from the upper side to the lower side. At the same time, the upper end of the first inner wall 31 of the box body 3 is inserted from the lower side toward the upper side between the outer wall 51 and the inner wall 52 of the upper cover 5. When the worker continues to insert the upper cover 5 downward into the box body 3 and can no longer move the upper cover 5 downward, the upper cover 5 with respect to the box body 3 can be moved. The assembly is completed, and the assembly of the electrical junction box 1 is completed.

  Next, with respect to the electrical junction box 1 according to the present embodiment, the flow of the liquid when a liquid (for example, water used for cleaning) collides with the housing 2 from the outside will be described with reference to FIGS. 3 and 4. explain. When the high-pressure liquid moves 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 housing 2, that is, the lower cover 4 side. A part of the liquid colliding with the boundary between the box body 3 and the lower cover 4 advances upward toward the space 3d of the box body 3 (S1). The liquid that has entered the space 3 d collides with the upper end of the second outer wall 42 bent by the bent portion 43. The liquid that has collided with the upper end is guided downward by the inclined surface 43a and discharged to the external space of the housing 2 (S2). Further, when a higher-pressure liquid collides with the inclined surface 43a, the inclined surface 43a is applied with an external force upward. Therefore, the second outer wall 42 is elastically deformed so that the bent portion 43 faces the tip end portion 44 upward, and the tip end facing surface 44a reliably contacts the outer wall facing surface 32a. As a result, the high-pressure liquid that has collided with the inclined surface 43a is guided downward by the inclined surface 43a, and is prevented from entering the space 3d from between the front end facing surface 44a and the outer wall facing surface 32a. It is discharged into the external space of the housing 2.

  When a part of the liquid enters above the bent portion 43 in the space 3d and further proceeds upward (S3), the liquid collides with the lower end surface 33a of the connecting plate 33. The liquid that has collided with the lower end surface 33a is guided in its own weight direction, that is, in the downward direction in the space portion 3d (S4), and between the front end portion facing surface 44a and the outer wall facing surface 32a to the external space of the housing 2. And discharged.

  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 housing 2, that is, the upper cover 5 side. A part of the liquid colliding with the boundary between the box body 3 and the upper cover 5 proceeds downward toward the space 3d of the box body 3 (S5). The liquid that has entered the space 3d collides with the upper side end surface 33b of the connecting plate 33, and part of the liquid rebounds upward and is discharged into the external space of the housing 2. Further, the other part stays on the connecting plate 33 and flows on the connecting plate 33 as the amount of the liquid staying on the connecting plate 33 increases, falls below the notch of the connecting plate 33, The liquid is discharged from the opening 32 b formed in the outer wall 32 to the external space of the housing 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 bent by the bent portion 43 closes the space portion 3d obliquely downward toward the outer wall facing surface 32a side and the lower side of the first outer wall 32. For example, in the case where the second outer wall 42 includes a bent portion formed in a direction perpendicular to the vertical direction, that is, along the horizontal direction, the liquid that has entered the space portion 3d collides with the second outer wall 42, and then the inclined surface. Therefore, there is a possibility of intrusion above the bent portion 43 from the gap between the outer wall facing surface 32a and the second outer wall 42. On the other hand, in the electrical junction box 1 in the present embodiment, the liquid that has entered the space 3d collides with the upper end of the second outer wall 42 and is guided downward by the inclined surface 43a. Can be prevented from entering the space 3d above the bent portion 43, and the liquid can be prevented from entering the internal space 2a of the housing 2 via the space 4c of the lower cover 4. Since it can do, waterproofness can be improved.

  In addition, the electrical junction box 1 according to the present embodiment has a second outer wall 42 formed so that the bent portion 43 can be elastically deformed, and an outer wall facing surface 32a of the first outer wall 32 at the distal end portion 44 of the second outer wall 42. A front end portion facing surface 44a is formed that faces and extends along the vertical direction. When the liquid comes into contact with the upper end of the second outer wall 42 and an upward external force is applied to the tip 44, the bent portion 43 is elastically deformed so that the tip facing surface 44a and the outer wall facing surface 32a reliably Abut. When a higher pressure liquid collides, the bent portion 43 is more positively elastically deformed, and the abutting force in a state where the tip portion facing surface 44a and the outer wall facing surface 32a are in contact increases. Even when the liquid collides, the liquid can be prevented from entering the space 3d. Moreover, as for the electrical junction box 1, the front-end | tip part opposing surface 44a surface-contacts with the outer wall opposing surface 32a. Compared with the case where the contact with the outer wall facing surface 32a is a point contact, the electrical connection box 1 improves the adhesion between the tip portion facing surface 44a and the outer wall facing surface 32a, so that the liquid can be more reliably transferred to the space 3d. Can be prevented from entering, and can be prevented from entering the internal space 2a of the housing 2, so that the waterproof property can be improved.

  Further, the second outer wall 42 is formed with a bent portion 43 so that, in the installed state, the distal end portion 44 is located at the same or higher side than the lower end portion of the first outer wall 32. That is, the front end portion facing surface 44a is located in the space 3d, and the entire surface faces the outer wall facing surface 32a. Therefore, it is possible to prevent the liquid from directly colliding with the tip portion facing surface 44a and entering the space portion 3d upward from between the tip portion facing surface 44a and the outer wall facing surface 32a. And since the liquid which collided with the 2nd outer wall 42 can be actively induced | guided | derived to the downward side by the inclined surface 43a, the electrical-connection box 1 can improve waterproofness.

  Further, in the electrical junction box 1 according to the present embodiment, the upper side end portion of the second outer wall 42 is bent toward the lower side by the bent portion 43 to form an obliquely downward inclination. When the upper end of the second outer wall 42 is bent along the horizontal direction, when the lower cover 4 is assembled to the box body 3, the assembly position of the lower cover 4 with respect to the box body 3 is shifted. Since the lower side end portion of the heavy wall comes into contact with the bent region of the second outer wall 42 along the horizontal direction, it is difficult for an operator to insert the second outer wall 42 into the space 3d. On the other hand, even when the assembly position of the lower cover 4 with respect to the box body 3 is shifted, the electrical connection box 1 can be easily inserted by guiding the second outer wall 42 into the space 3d by the inclination of the bent portion 43. Therefore, the load at the time of the assembly of the electric junction box 1 by an operator can be reduced, and the productivity and reliability of the electric junction box 1 can be improved.

  Further, 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 of the first inner wall 31 is between the second inner wall 41 and the second outer wall 42 in the installed state. Is inserted into the space 4c. That is, in the installed state, the second inner wall 41 is positioned inside the lower end portion of the first inner wall 31 (the inner space side of the housing 2), so that the liquid enters the space 3d, and further the second outer wall. When it infiltrates between 42 and the inner wall opposing surface 31a, since the 2nd inner wall 41 prevents that the said liquid permeates into the internal space part 4a, the electrical junction box 1 can improve waterproofness more.

  Moreover, since the electrical junction box 1 according to the present embodiment includes the connecting plate 33 in the region where the box body 3 forms the double wall, the liquid that has entered the space 3d above the bent portion 43 is allowed to enter. Colliding with the lower end surface 33 a of the connecting plate 33 and 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 can be suppressed. Further, the liquid that has entered the space 3d from the upper side collides with the upper end surface 33b, travels downward in the space 3d, and reaches the boundary between the first inner wall 31 and the second outer wall 42. be able to. As described above, the electrical junction box 1 can prevent the liquid that has entered the space portion 3d from entering the internal space portion 2a of the housing 2 by forming the connecting plate 33. Can be improved.

  The connecting plate 33 is formed by connecting both ends to the first inner wall 31 and the first outer wall 32. That is, since the connecting plate 33 is formed so as to intersect the first inner wall 31 and the first outer wall 32 formed along the vertical direction, the first inner wall 31 and the first outer wall 32 are prevented from being bent, The rigidity of the housing 2 of the electrical junction box 1 can be improved.

  Further, in the electrical junction box 1 according to the present embodiment, the first outer wall 32 is formed with an opening 32b that exposes the locking claw 45 engaged with the locking receiving portion 34 to the outside in the installed state. Even if the first outer wall 32 is positioned outside the second outer wall 42, the operator can check the engagement state between the locking claw 45 and the locking receiving portion 34, and the electrical junction box 1. Reliability can be improved.

  Further, the locking claw 45 is inserted into the space 3d while the first inner wall 31 and the first outer wall 32 are separated from each other. That is, since the latching claw 45 is press-fitted into the space 3d, in the region where the latching claw 45 is formed in the second outer wall 42, liquid enters the space 3d from below. Can be suppressed. In addition, since the liquid can be prevented from entering the space portion 3d from below by the locking claw 45, the coupling plate 33 is formed in the area where the locking claw 45, that is, the locking receiving portion 34 is formed. Even if is not formed, it is possible to prevent the liquid from entering the internal space 2 a of the housing 2 from between the outer wall 51 and the first inner wall 31 of the upper cover 5. Further, in the region where the latch receiving portion 34 is formed, the connecting plate 33 is not required, so that the box body 3 can be collectively formed by a mold that is divided in one vertical direction. .

  Since the wire harness 100 described above includes the electrical junction box 1, the liquid can be prevented from entering between the first inner wall and the first outer wall, and can enter the housing. Since it can suppress, waterproofness can be improved.

  In the electrical connection box 1 according to the present embodiment, the double wall formed by the first inner wall 31 and the first outer wall 32 of the box body 3 is formed on the near side, but the present invention is not limited thereto. For example, the electrical junction box 1 may have a configuration in which a double wall is formed as a peripheral wall of the box body 3 over the entire circumference.

DESCRIPTION OF SYMBOLS 1 Electrical junction box 2 Case 2a Internal space part 3 Box main body (1st case member)
3a Internal space portion 3b Lower side opening portion 3c Upper side opening portion 3d Space portion 31 First inner wall 31a Inner wall facing surface 32 First outer wall 32a Outer wall facing surface 32b Opening portion 33 Connecting plate 34 Locking receiving portion 4 Lower cover (second housing) Body member)
4a Internal space portion 4b Upper side opening portion 4c Space portion 41 Second inner wall 42 Second outer wall 43 Bending portion 43a Inclined surface 44 Tip portion 44a Tip portion facing surface 45 Locking claw 5 Upper cover 5a Internal space portion 51 Outer wall 52 Inner wall 53 Lower end 100 Wire harness 101 Electric wire 200 Electronic component

Claims (5)

A first housing member that is at least a part of a housing that houses electronic components;
A lower opening that is a part of the housing and is located on the lower side of the first housing member and formed at the lower end of the first housing member in the installed state of the housing A second housing member for closing
With
The first housing member has a double wall having a first inner wall and a first outer wall formed along the lower opening,
The second casing member is formed with a second outer wall positioned between the first inner wall and the first outer wall in the installed state,
The second outer wall is
In the installed state, a bent portion that is bent toward the outer wall facing surface side of the first outer wall facing the first inner wall and toward the lower side is formed at the upper end portion.
An electrical junction box characterized by that. The electrical junction box according to claim 1,
The second casing member has a second inner wall formed along the second outer wall inside the second outer wall,
Between the second outer wall and the second inner wall, in the installed state, a lower side end of the first inner wall is located.
Electrical junction box. In the electrical junction box according to claim 1 or 2,
The first housing member has a connecting plate that is disposed between the first inner wall and the first outer wall and whose both ends are connected to the first inner wall and the first outer wall, respectively.
The connecting plate divides two spaces in the vertical direction between the first inner wall and the first outer wall, and is formed along the lower opening.
Electrical junction box. In the electrical junction box according to any one of claims 1 to 3,
The first housing member has at least one locking receiving portion formed on an inner wall facing surface of the first inner wall facing the first outer wall,
The second casing member is positioned on the second outer wall between the first inner wall and the first outer wall in the installed state, and has at least one locking claw that engages with the locking receiving portion. Formed above,
The first outer wall is formed with an opening at a position facing the locking claw engaged with the locking receiving portion in the installed state.
Electrical junction box. Electric wires,
A first housing member that is at least a part of a housing that accommodates an electronic component; and a part of the housing; in the installed state of the housing, located below the first housing member; And a second casing member that closes the lower opening formed at the lower end of the first casing member, and an electrical junction box,
With
The first casing member is formed with a double wall having an inner wall and an outer wall along the lower opening,
The second casing member is formed with a lower peripheral wall located between the inner wall and the outer wall in the installed state,
The lower peripheral wall is
In the installed state, a bent portion that is bent toward the outer wall facing surface side of the outer wall facing the inner wall and toward the lower side is formed at the upper end portion.
A wire harness characterized by that.

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