JP6887918B2 - Electrical junction box - Google Patents

Description

The present invention relates to an electrical junction box.

Electric junction boxes (also called junction boxes, fuse boxes, relay boxes, etc.) that are mounted on vehicles such as automobiles and that collectively house electronic components such as fuses and relays are known. For example, Patent Document 1 includes a first housing member and a second housing member that closes an opening of the first housing member, and the side wall of the first housing member has an outer wall and an inner wall. The second housing member has a side wall main body portion and a tip portion at an upper end portion of the side wall main body portion, and the tip portion extends from the upper side end portion of the side wall main body portion and has an outer wall. The insertion wall located between the inner wall and the water stop wall extending from the upper end of the side wall main body portion and facing the insertion wall across the inner wall, and the insertion wall and the water stop wall. The configuration of the electrical junction box having the groove formed and the groove portion is disclosed.

JP-A-2017-108493

When cleaning the engine room with high pressure, a high-pressure liquid may collide with the outer peripheral surface of the housing and enter the inside of the housing from the boundary between the housing body and the upper cover. It is desired to prevent the liquid that has entered the inside of the housing from adhering to the electronic components.

An object of the present invention is to provide an electric junction box capable of improving waterproofness.

The electrical connection box of the present invention has a housing body having an opening on the upper cover side, a holding member arranged in the internal space of the housing body to hold electronic components, and an upper that closes the opening on the upper cover side. The cover and the impermeable plate attached to at least one of the holding member and the housing body are included. The water-impervious plate is characterized in that it faces the boundary between the inner surface of the housing body and the inner surface of the upper cover, and separates the space on the boundary side from the space on the electronic component side. And.

In the electrical connection box according to the present invention, a water-impervious plate is arranged between the boundary between the housing body and the upper cover and the electronic components. Since the impermeable plate divides the space on the boundary side and the space on the electronic component side, it is possible to prevent the liquid infiltrated from the boundary portion from being applied to the electronic component. Therefore, it has the effect of improving waterproofness.

FIG. 1 is a perspective view showing an electrical connection box according to an embodiment. FIG. 2 is an exploded perspective view showing the electrical connection box according to the embodiment. FIG. 3 is an exploded perspective view showing the electrical connection box according to the embodiment. FIG. 4 is a plan view showing an electrical connection box according to the embodiment. FIG. 5 is a cross-sectional view showing an electrical connection box according to the embodiment. FIG. 6 is an enlarged cross-sectional view of a main part showing the electrical connection box according to the embodiment. FIG. 7 is an exploded perspective view showing an electrical connection box according to the first modification of the embodiment. FIG. 8 is a perspective view showing the impermeable plate of the first modification of the embodiment. FIG. 9 is an exploded perspective view showing an electrical connection box according to a second modification of the embodiment.

Hereinafter, the electrical connection box according to the embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment. In addition, the components in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

[Embodiment]
An embodiment will be described with reference to FIGS. 1 to 6. The present embodiment relates to an electrical junction box. FIG. 1 is a perspective view showing an electrical connection box according to an embodiment. FIG. 2 is an exploded perspective view showing the electrical connection box according to the embodiment. FIG. 3 is an exploded perspective view showing the electrical connection box according to the embodiment. FIG. 4 is a plan view showing an electrical connection box according to the embodiment. FIG. 5 is a cross-sectional view showing an electrical connection box according to the embodiment. FIG. 6 is an enlarged cross-sectional view of a main part showing the electrical connection box according to the embodiment. FIG. 5 is a diagram showing a cross section taken along line VV shown in FIG. In FIG. 4, the upper cover is not shown.

The electrical junction box may also be called a junction box, a fuse box, a relay box, or the like depending on the type of electronic component to be accommodated, but in the embodiment, these are collectively referred to as an "electrical junction box".

As shown in FIGS. 1 to 4, the electrical connection box 1 according to the embodiment includes a housing 10, a holding member 13, and a water-impervious plate 31. The housing 10 includes a housing body 11 and an upper cover 12. As shown in FIG. 2, the housing main body 11 has a tubular outer wall portion 11a and a tubular inner side wall portion 11b. The outer side wall portion 11a surrounds the inner side wall portion 11b, and the outer wall portion 11a and the inner side wall portion 11b form a double wall. The housing body 11 has an internal space SP surrounded by an inner side wall portion 11b. The outer side wall portion 11a and the inner side wall portion 11b are integrally molded using an insulating material such as a synthetic resin. The outer side wall portion 11a and the inner side wall portion 11b are tubular components having both ends open in the axial direction Z, respectively. In the embodiment, the outer wall portion 11a and the inner side wall portion 11b have a rectangular frame shape when viewed from the axial direction Z. That is, in the embodiment, the outer wall portion 11a and the inner side wall portion 11b are square tubular constituent portions.

The outer side wall portion 11a is arranged at a distance from the outer surface of the inner side wall portion 11b. That is, the inner side surface of the outer wall portion 11a and the outer surface of the inner side wall portion 11b face each other. The upper end of the inner side wall portion 11b and the upper end of the outer wall portion 11a are substantially at the same height position. One of the openings at both ends of the tubular outer wall portion 11a and the tubular inner side wall portion 11b is closed by the upper cover 12. That is, the housing body 11 has an upper cover side opening 11h that is closed by the upper cover 12.

The upper cover 12 is a box-shaped lid having an open lower portion. When viewed from the axial direction Z, the upper cover 12 has a rectangular shape. As shown in FIGS. 5 and 6, the side wall of the upper cover 12 has an outer wall portion 12a and an inner side wall portion 12b. When the upper cover side opening 11h is closed by the upper cover 12, the outer wall portion 12a of the upper cover 12 covers the upper end portion of the outer wall portion 11a of the housing body 11. Further, the inner side wall portion 12b of the upper cover 12 closes the space between the outer wall portion 11a and the inner side wall portion 11b in the housing body 11. The upper cover 12 is formed by using an insulating material such as a synthetic resin.

As shown by the broken line in FIG. 1, the opening on the side opposite to the upper cover side opening 11h in the housing body 11 is closed by the lower cover 14. The lower cover 14 is formed by using an insulating material such as a synthetic resin. In addition, in FIGS. 2 to 7 and 9, the illustration of the lower cover 14 is omitted.

As shown in FIGS. 2 and 3, when the upper cover side opening 11h is not closed by the upper cover 12, the upper cover side opening 11h communicates with the internal space SP of the housing body 11 and the external space. The upper cover 12 is a lid-shaped member that closes the upper cover side opening 11h of the housing body 11. The upper cover 12 is detachably attached to the housing body 11.

In the embodiment, the direction from the internal space SP toward the upper cover 12 along the axial direction Z is referred to as "the forward direction of the axial direction Z", and the direction toward the opposite direction to the forward direction of the axial direction Z is "the axial direction Z". It is called "negative direction". One direction orthogonal to the axial direction Z is referred to as the first width direction X, and the direction orthogonal to the axial direction Z and the first width direction X is referred to as the second width direction Y. In the embodiment, the first width direction X is a direction along one side of the rectangular frame-shaped outer wall portion 11a. The second width direction Y is a direction along the other side of the outer wall portion 11a orthogonal to one side of the outer wall portion 11a along the first width direction X. The "height position" is a position in the positive direction of the axial direction Z, and is defined as a "higher position" as it is on the positive direction side of the axial direction Z. Further, the more negative the axial direction Z is, the lower the position is.

In the embodiment, the upper cover 12 has a plurality of locked portions 12k extending toward the housing body 11 side, that is, in the negative direction of the axial direction Z. The locked portion 12k is integrally formed with the outer surface of the outer wall portion 12a of the upper cover 12. The housing body 11 has a plurality of locking portions 11k on the outer surface of the outer wall portion 11a. The locking portion 11k is integrally formed with the outer surface of the outer wall portion 11a of the housing body 11. The locking portion 11k is a protrusion protruding from the outer surface of the outer wall portion 11a. The locking portion 11k is formed at a position corresponding to the locked portion 12k. The upper cover 12 is assembled to the housing body 11 by engaging the locked portion 12k and the locking portion 11k.

As shown in FIGS. 2 to 6, the holding member 13 is arranged in the internal space SP of the housing body 11. The holding member 13 is called a block or the like in this technical field, and is formed by using an insulating material such as a synthetic resin. The holding member 13 has a storage space for accommodating the electronic component 20, and holds the electronic component 20 in the accommodating space. For example, the electronic component 20 is a connector, a fuse, a relay, a capacitor, a branch portion, an electronic control unit, an electronic component unit in which these are unitized, and the like.

As shown in FIG. 2, the impermeable plate 31 is a rectangular plate-shaped member having two main surfaces (a wide surface having an area wider than the other surfaces) on the front and back surfaces. In the embodiment, one main surface of the two main surfaces of the impermeable plate 31 is referred to as a first main surface 31a, and the other main surface is referred to as a second main surface 31b. The impermeable plate 31 is formed by using an insulating material such as a synthetic resin. The impermeable plate 31 is assembled to at least one of the holding member 13 and the housing body 11.

In the embodiment, as shown by the arrow Ab1 of the alternate long and short dash line in FIG. 2, the impermeable plate 31 is assembled to the peripheral wall 13w (see FIG. 4) of the holding member 13. As shown in FIGS. 4 to 6, the lower end of the impermeable plate 31 is in contact with the peripheral wall 13w.

That is, the lower end of the impermeable plate 31 is in contact with the peripheral wall 13w without a gap. Therefore, it is possible to prevent the liquid that has entered the inside of the housing 10 from flowing from between the impermeable plate 31 and the peripheral wall 13w to the electronic component 20 side.

As shown in FIG. 2, the impermeable plate 31 has a locked portion 31k. In the embodiment, the impermeable plate 31 has two locked portions 31k. The locked portion 31k extends downward (in the embodiment, the negative direction of the axial direction Z) from both ends of the impermeable plate 31 in the width direction (in the embodiment, the second width direction Y). .. The locked portion 31k has a claw-shaped tip portion at the lower end portion. The water-impervious plate 31 has a holding member 31k by locking the locked portion 31k to a holding portion (here, a locking portion) provided on at least one of the holding member 13 and the housing body 11. It is assembled to at least one of 13 and the housing body 11. The water-impervious plate 31 may be fixed by being press-fitted into a holding portion (for example, a groove) provided in at least one of the holding member 13 and the housing main body 11, for example.

For example, the holding portion may not be provided in advance on at least one of the holding member 13 and the housing main body 11 for the purpose of holding the impermeable plate 31. For example, the holding portion may be a groove or a recess on the inner side surface 11s of the housing body 11. For example, the locked portion 31k of the impermeable plate 31 may be locked in the groove or recess of the inner side surface 11s. The holding portion may be a lightening hole provided in the holding member 13. Here, the lightening hole of the holding member 13 refers to a hole formed for the purpose of reducing the weight of the holding member 13 and reducing the material. For example, the impermeable plate 31 may be press-fitted into the lightening hole of the holding member 13. For example, the locked portion 31k of the impermeable plate 31 may be locked in the lightening hole of the holding member 13. When the impermeable plate 31 is press-fitted into the holding portion, the locked portion 31k may not be provided on the impermeable plate 31.

For example, the impermeable plate 31 may be detachably attached to at least one of the holding member 13 and the housing body 11. For example, when the upper cover 12 of the electrical connection box 1 is removed and the electronic component 20 is replaced, the impermeable plate 31 can also be removed. By removing the impermeable plate 31, a wide working space for replacing the electronic component 20 in the internal space SP can be secured. Therefore, it is possible to improve the maintainability while improving the waterproofness of the electrical connection box 1.

As shown in FIGS. 5 and 6, the impermeable plate 31 is arranged between the inner side surface 11s (inner side surface of the inner side wall portion 11b) of the housing body 11 and the electronic component 20. The first main surface 31a of the impermeable plate 31 is a boundary portion between the inner side surface 11s of the housing body 11 (inner side surface of the inner side wall portion 11b) and the inner side surface 12s of the upper cover 12 (inner side surface of the inner side wall portion 12b). Facing BL. The other main surface of the impermeable plate 31 faces the electronic component 20. The impermeable plate 31 partitions the space on the boundary portion BL side facing the first main surface 31a and the space on the electronic component 20 side facing the second main surface 31b. That is, the impermeable plate 31 separates the space on the boundary portion BL side facing the first main surface 31a and the space on the electronic component 20 side facing the second main surface 31b. Here, as shown in FIG. 4, the inner side surface 11s of the housing body 11 has a first inner side surface 11sa and a second inner side surface 11sb that intersects the first inner side surface 11sa. In the embodiment, the first main surface 31a of the impermeable plate 31 faces the boundary BL between the first inner surface 11sa and the inner surface 12s of the upper cover 12 (FIG. 6).

With reference to FIG. 6, the flow of the liquid when the electric connection box 1 according to the embodiment is splashed with a liquid (for example, a cleaning liquid, water, etc.) will be described. For example, during high-pressure cleaning, a high-pressure liquid may collide with the outer peripheral surface of the housing 10 and enter the inside of the housing 10 from the boundary between the housing body 11 and the upper cover 12. The arrows LQ1 and LQ2 shown in FIG. 6 exemplify the flow of the liquid when the liquid has entered the inside of the housing 10.

As shown by the arrow LQ1, when the liquid is applied to the boundary between the housing body 11 and the upper cover 12 (particularly when the liquid is sprayed at a high pressure), the liquid is transferred to the housing body 11 and the upper cover 12. It may invade the inside of the housing 10 from the boundary between the two. As shown by the arrow LQ2, the liquid that has entered the inside of the housing 10 scatters from the boundary portion BL of the housing body 11 toward the direction in which the electronic component 20 is arranged. Here, in the embodiment, the impermeable plate 31 is provided between the boundary portion BL and the electronic component 20, and partitions the space on the boundary portion BL side and the space on the electronic component 20 side. Since the impermeable plate 31 is provided, the liquid scattered in the direction in which the electronic component 20 is arranged is blocked by the impermeable plate 31.

In the housing 10, the impermeable plate 31 projects from the internal space SP toward the upper cover 12. In the embodiment, the height position of the upper end of the impermeable plate 31 (the end opposite to the holding member 13 side) is higher than the height position of the boundary portion BL. Since the height position of the upper end of the impermeable plate 31 is higher than the boundary portion BL, it is possible to prevent the scattered liquid from jumping over the impermeable plate 31 and reaching the electronic component 20. Further, the height position of the impermeable plate 31 is higher than the height position of the upper end (the end (face) on the side opposite to the holding member 13 side) of the electronic component 20. Since the height position of the upper end of the impermeable plate 31 is higher than the upper end of the electronic component 20, it is possible to more reliably prevent the scattered liquid from reaching the electronic component 20. The height position of the impermeable plate 31 may be a height equal to or lower than the height position of the upper end of the electronic component 20.

In the embodiment, the width of the impermeable plate 31 in the second width direction Y is wider than the width of the electronic component 20. In the projection view from the first width direction X, the impermeable plate 31 includes a portion overlapping from one end to the other end of the electronic component 20 in the second width direction Y. In the projection view from the first width direction X, the impermeable plate 31 overlaps from one end to the other end of the electronic component 20 in the second width direction Y, so that the liquid that has entered the inside of the housing 10 is more easily absorbed. It can be blocked reliably. In the embodiment, the impermeable plate 31 extends from one end to the other end of the holding member 13 along the second width direction Y. By extending the impermeable plate 31 from one end to the other end of the holding member 13, it is possible to prevent the liquid that has entered the inside of the housing 10 from adhering to the holding member 13. For example, it is possible to prevent the liquid from adhering to the upper surface of the holding member 13 and the liquid from flowing and adhering to the electronic component 20.

The size (width and height) of the impermeable plate 31 is set as needed. The water-impervious plate 31 may be assembled to at least one of the holding member 13 and the housing body 11 at a plurality of locations. For example, the holding portions (grooves, holes, locking portions, etc.) may be provided at at least one of the housing body 11 and the holding member 13. Since the holding portions are provided at a plurality of locations inside the housing 10, the impermeable plate 31 can be assembled at various positions. That is, the assembly location of the impermeable plate 31 inside the housing 10 can be selected as needed. For example, the impermeable plate 31 can be selectively attached so as to face a portion of the boundary BL where liquid may infiltrate.

For example, as shown by the arrow Ab2 in FIG. 2, the impermeable plate 31 may be assembled so that the first main surface 31a of the impermeable plate 31 faces the second inner side surface 11sb (see FIG. 4). .. In this case, the impermeable plate 31 is arranged so as to extend along the first width direction X. The first main surface 31a faces the boundary BL between the second inner side surface 11sb of the housing body 11 and the inner side surface 12s of the upper cover 12, and the second main surface 31b faces the electronic component 20. .. The impermeable plate 31 partitions the space on the BL side of the boundary between the second inner side surface 11sb of the housing body 11 and the inner side surface 12s of the upper cover 12 and the space on the electronic component 20 side. That is, the impermeable plate 31 separates the space on the BL side of the boundary between the second inner side surface 11sb of the housing body 11 and the inner side surface 12s of the upper cover 12 and the space on the electronic component 20 side.

The water-impervious plate 31 is assembled to one (or a set) of holding portions provided at a plurality of positions of at least one of the housing main body 11 and the holding member 13. For example, when the holding portion is a groove, the impermeable plate 31 may be assembled to the holding portion by press fitting. When the holding portion is a locking portion, the two locked portions 31k of the impermeable plate 31 may be assembled by being locked to the locking portion.

As described above, the electrical connection box 1 according to the present embodiment includes the housing main body 11, the holding member 13, the upper cover 12, and the impermeable plate 31. The housing body 11 has an upper cover side opening 11h. The holding member 13 is arranged in the internal space SP of the housing body 11 and holds the electronic component 20. The upper cover 12 closes the upper cover side opening 11h. The impermeable plate 31 is assembled to at least one of the holding member 13 and the housing body 11. The impermeable plate 31 faces the boundary BL of the inner side surface 11s of the housing body 11 and the inner side surface 12s of the upper cover 12, and separates the space on the boundary BL side from the space on the electronic component 20 side.

In the electrical connection box 1 of the embodiment, the impermeable plate 31 is arranged between the boundary portion BL and the electronic component 20. Since the impermeable plate 31 partitions the space on the boundary BL side and the space on the electronic component 20 side, it is possible to prevent the liquid that has entered the housing 10 from the boundary BL from being applied to the electronic component 20. it can. Therefore, the waterproofness of the electrical connection box 1 can be improved. The impermeable plate 31 is assembled to at least one of the holding member 13 and the housing body 11. For example, since the impermeable plate 31 can be attached after assembling the contents of the electronic component 20 and the housing 10 to the housing main body 11, the waterproofness of the electrical connection box 1 is improved and the assembling workability is also improved. Can be made to.

Further, in the electrical connection box 1 according to the present embodiment, the impermeable plate 31 can be assembled to a plurality of locations of at least one of the holding member 13 and the housing main body 11.

Depending on the type of vehicle on which the electrical junction box 1 is mounted, the mounting position of the electrical junction box 1, and the orientation in which the electrical junction box 1 is mounted, the location where the liquid may infiltrate at the boundary BL also changes. In the electrical connection box 1 according to the embodiment, the assembly location of the impermeable plate 31 can be selected according to the type of the vehicle to be mounted, the mounting position, and the mounting direction. The waterproofness of the electric junction box can be improved without changing the shape of the housing 10 according to the type of vehicle and the mounting method. Moreover, the versatility of the electrical connection box 1 can be enhanced.

Further, in the electrical connection box 1 according to the present embodiment, the impermeable plate 31 is assembled to the peripheral wall 13w of the holding member 13. The lower end of the impermeable plate 31 is in contact with the peripheral wall 13w.

Since the lower end of the impermeable plate 31 is in contact with the peripheral wall 13w, it is possible to prevent the liquid that has entered the inside of the housing 10 from flowing from between the impermeable plate 31 and the peripheral wall 13w to the electronic component 20 side. it can. Therefore, the waterproofness of the electric junction box can be improved.

In the embodiment, the housing body 11 having a rectangular cross section when viewed from the axial direction Z has been described as an example, but the housing body having a polygonal cross section when viewed from the axial direction Z is not rectangular. It may be 11. Similarly, the shape of the upper cover 12 when viewed from the axial direction Z may be a polygonal shape other than a rectangle.

[First modification of the embodiment]
A first modification of the embodiment will be described. FIG. 7 is an exploded perspective view showing an electrical connection box according to the first modification of the embodiment. FIG. 8 is a perspective view showing the impermeable plate of the first modification of the embodiment. FIG. 7 corresponds to FIG. 2 of the above embodiment.

The electric connection box 1 according to the present modification is different from the electric connection box 1 of the above embodiment, for example, an L-shaped water shield 32 is provided instead of the rectangular plate 31. It is a point.

As shown in FIGS. 7 and 8, the impermeable plate 32 of this modified example has an L-shaped cross section when viewed from the axial direction Z. As shown in FIG. 7, the impermeable plate 32 is assembled along the inner side surface 11s of one corner of the housing body 11. As shown in FIG. 8, the impermeable plate 32 has a first impermeable portion 32p, a second impermeable portion 32q, and a bent portion 32r. The second impermeable portion 32q intersects the first impermeable portion 32p. In this modification, the second impermeable portion 32q is orthogonal to the first impermeable portion 32p. The bent portion 32r connects the first impermeable portion 32p and the second impermeable portion 32q.

The first impermeable portion 32p and the second impermeable portion 32q each have a rectangular plate shape having two main surfaces, front and back. The impermeable plate 32 is formed by using an insulating material such as a synthetic resin. In this modification, of the two main surfaces of the first impermeable portion 32p, one is referred to as the first main surface 32a and the other is referred to as the second main surface 32b. Further, of the two main surfaces of the second impermeable portion 32q, one is referred to as a third main surface 32c and the other is referred to as a fourth main surface 32d. The first main surface 32a and the third main surface 32c are surfaces on the dominant angle side of the L-shaped impermeable plate 32. Further, the second main surface 32b and the fourth main surface 32d are surfaces on the inferior angle side of the L-shaped plate-shaped impermeable plate 32. As shown in FIG. 7, in the impermeable plate 32, the first main surface 32a and the third main surface 32c are directed toward the inner side surface 11s side of the housing main body 11, and the second main surface 32b and the fourth main surface 32d Is assembled toward the electronic component 20. At this time, the bent portion 32r faces the bent surface 11sr that connects the first inner side surface 11sa and the second inner side surface 11sb of the housing body 11 (see FIG. 4). In this modification, the first main surface 32a of the impermeable plate 32 faces the first inner surface 11sa (see FIG. 4) of the housing body 11, and the third main surface 32c is the second inner surface 11sb (see FIG. 4). It is assembled so as to face (see FIG. 4).

As shown in FIG. 8, the impermeable plate 32 has a locked portion 32k. In this modification, the impermeable plate 32 has two locked portions 32k. One of the two locked portions 32k extends downward (in this modified example, the negative direction side of the axial direction Z) from the end portion of the first impermeable portion 32p opposite to the bent portion 32r side. Exists. The other of the two locked portions 32k extends downward from the end of the second impermeable portion 32q on the side opposite to the bent portion 32r side (in this modified example, the negative direction side of the axial direction Z). Exists. The locked portion 32k has a claw-shaped tip portion at the lower end portion. The locked portion 32k is locked to a locking portion provided on at least one of the holding member 13 and the housing body 11. By locking the locked portion 32k, the water shield plate 32 is assembled to at least one of the holding member 13 and the housing body 11.

The impermeable plate 32 does not have to have the locked portion 32k. In this case, the impermeable plate 32 is assembled by being press-fitted into a holding portion (for example, a groove) provided in at least one of the holding member 13 and the housing main body 11.

At least one of the holding member 13 and the housing body 11 may have holding portions at a plurality of locations. For example, the impermeable plate 32 may be assembled so that any of the four corners of the housing body 11 faces one of the corners.

As described above, in the electrical connection box 1 according to the present modification, the impermeable plate 32 includes the first impermeable portion 32p, the second impermeable portion 32q intersecting the first impermeable portion 32p, and the second impermeable portion 32q. It has a bent portion 32r that connects the first impermeable portion 32p and the second impermeable portion 32q. The inner side surface 11s of the housing body 11 has a first inner side surface 11sa and a second inner side surface 11sb that intersects the first inner side surface 11sa. The first impermeable portion 32p faces the first inner side surface 11sa. The second impermeable portion 32q faces the second inner side surface 11sb.

In the electrical connection box 1 according to the present modification, since the water-impervious plate 32 has the bent portion 32r, the water-impervious plate 32 can be assembled so as to face the inner side surface 11s of the corner portion of the housing body 11. it can. By assembling the impermeable plate 32 so as to face the inner side surface 11s at the corner of the housing body 11, the liquid that has entered from the boundary BL at the corner of the housing 10 adheres to the electronic component 20. It can be suppressed.

[Second variant of the embodiment]
A second modification of the embodiment will be described. FIG. 9 is an exploded perspective view showing an electrical connection box according to a second modification of the embodiment.

The electric connection box 1 according to this modification is different from the electric connection box 1 of the above embodiment in that, for example, a water shield 33 is provided in addition to the water shield 31.

As shown in FIG. 9, the impermeable plate 33 is a rectangular plate-shaped member having two main surfaces, front and back. In this modification, one of the two main surfaces of the impermeable plate 33 is referred to as a third main surface 33a, and the other main surface is referred to as a fourth main surface 33b. The impermeable plate 33 is formed by using an insulating material such as a synthetic resin.

The impermeable plate 33 is arranged between the second inner side surface 11sb of the housing body 11 and the electronic component 20. The impermeable plate 33 is assembled to at least one of the holding member 13 and the housing body 11. The impermeable plate 33 is assembled so that the third main surface 33a faces the second inner side surface 11sb and the fourth main surface 33b faces the electronic component 20. The impermeable plate 33 partitions the space on the boundary BL (see FIG. 4) side between the second inner side surface 11sb and the inner side surface 12s (see FIG. 5) of the upper cover 12 and the space on the electronic component 20 side. That is, the impermeable plate 33 separates the space on the boundary BL side and the space on the electronic component 20 side.

The impermeable plate 33 has a locked portion 33k. In this modification, the impermeable plate 33 has two locked portions 33k. The two locked portions 33k extend downward (axial direction Z in this modification) from both ends of the impermeable plate 31 in the width direction (first width direction X in this modification). There is. The locked portion 33k has a claw-shaped tip portion at the lower end portion. The water-impervious plate 33 has a holding member 13 by locking the locked portion 33k to a holding portion (here, a locking portion) provided on at least one of the holding member 13 and the housing body 11. And it is assembled to at least one of the housing body 11.

The water-impervious plate 33 may be fixed by being press-fitted into a holding portion provided on at least one of the holding member 13 and the housing main body 11, for example. For example, the impermeable plate 33 is located on at least one of the holding member 13 and the housing body 11 even if it is not provided as a holding portion in advance on at least one of the holding member 13 and the housing body 11. It may be press-fitted into a groove or the like. For example, the locked portion 33k of the impermeable plate 33 does not have to be provided as a locking portion in advance on at least one of the holding member 13 and the housing body 11, but the holding member 13 and the housing body 11 It may be locked in a groove or a recess in at least one of the above.

The contents disclosed in the above-described embodiment and each modification can be combined and executed as appropriate.

1 Electrical junction box 10 Housing 11 Housing body 11a, 12a Outer side wall 11b, 12b Inner side wall 11h Upper cover side opening 11k Locking part 11s, 12s Inner side surface 11sa First inner side surface 11sb Second inner side surface 11sr Bending Surface 12 Upper cover 12k Locked part 13 Holding member 13w Peripheral wall 14 Lower cover 20 Electronic parts 31, 32, 33 Impermeable plates 31a, 32a First main surface 31b, 32b Second main surface 31k, 32k Locked part 32c No. Three main surfaces 32d Fourth main surface 32p First impermeable part 32q Second impermeable part 32r Bending parts Ab1, Ab2 Arrow SP Internal space X First width direction Y Second width direction Z axis direction

Claims (4)

A housing body with an opening on the upper cover side and
A holding member arranged in the internal space of the housing body and holding electronic components,
An upper cover that closes the opening on the upper cover side and
A water shield attached to at least one of the holding member and the housing body,
With
The impermeable plate faces the boundary between the inner surface of the housing body and the inner surface of the upper cover, and separates the space on the boundary side from the space on the electronic component side.
An electrical junction box that features that. The electrical connection box according to claim 1, wherein the water-impervious plate can be assembled to a plurality of locations of at least one of the holding member and the housing body. The impermeable plate includes a first impermeable portion, a second impermeable portion that intersects the first impermeable portion, and a bent portion that connects the first impermeable portion and the second impermeable portion. Have,
The inner surface of the housing body has a first inner surface and a second inner surface that intersects the first inner surface.
The first impermeable portion faces the first inner side surface and
The second impermeable portion faces the second inner surface surface.
The electrical junction box according to claim 1 or 2. The impermeable plate is assembled to the peripheral wall of the holding member.
The lower end of the impermeable plate is in contact with the peripheral wall.
The electrical connection box according to any one of claims 1 to 3.

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