JP2023184553A - Electric connection box - Google Patents

Abstract

To provide an electric connection box capable of suppressing immersion of a powder-like foreign material into a fitting groove.SOLUTION: An electric connection box 1 comprises: a lower case 10 including an open part O and a lower marginal part 13; an upper case 20 blocking the open part O of the lower case 10, and including an upper marginal part 23 combined with the lower marginal part 13; and a rubber ring member 30 fitted into a fitting groove 50 formed in the lower marginal part 13. A sealing marginal part 2 sealing so as to combine the lower marginal part 13 and the upper marginal part 23 is structured, and a bolt 40 penetrating the upper marginal part 23 and fastening a cylinder hole part 15 of the sealing marginal part 2 is provided. An inside immersion suppression part 60 that suppresses immersion of a powder-like foreign material to a contact portion of the lower marginal part 13 and the upper marginal part 23, and the ring member 30 is provided between the cylindrical hole part 15 and the fitting groove 50.SELECTED DRAWING: Figure 4

Description

The present invention relates to, for example, an electrical connection box equipped with a ring member for preventing water from entering the inside.

Generally, electronic components such as fuses, circuit boards on which electronic control circuits are mounted, and the like are housed inside an electrical junction box mounted on a vehicle. For this reason, the electrical connection box is equipped with a waterproof structure to prevent water from entering inside.

As an example of such an electrical junction box, Patent Document 1 discloses an electrical junction box that includes a case body having a case edge provided with a fitting groove into which a rubber ring member functioning as a gasket is fitted. ing. This electrical connection box is constructed by assembling a cover body to a case body so that a ring member fitted into a fitting groove is sandwiched between a cover edge of the cover body and a case edge.

In the electrical junction box configured in this way, even if water enters through the gap between the case body and the cover body, the ring member prevents water from entering inside, and protects the circuit boards etc. stored inside. It is said to protect from flooding.

However, dust such as sand and dust, and powdery foreign matter caused by friction and chemical changes between the case body, cover body, and bolts enter the fitting groove through the gap between the cover edge and the case edge. It is possible to do so. These powdery foreign substances that have entered the fitting groove may damage or deteriorate the ring member, for example, and reduce the water-stopping properties of the ring member.

Japanese Patent Application Publication No. 2000-161496

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide an electrical connection box that can suppress the intrusion of powdery foreign matter into a fitting groove.

The present invention provides a case body having an opening and an opening edge, a cover body having a cover edge that closes the opening of the case body and fits with the opening edge, and a fitting formed on the opening edge. A ring member made of rubber is fitted into the groove, and the opening edge and the cover edge meet to form a sealing edge, and the sealing edge penetrates the cover edge and seals the cover edge. A foreign matter intrusion suppressing portion is provided with a fastening material that fastens a fastening point of the sealing edge, and suppresses intrusion of powdery foreign matter into a contact point between the opening edge, the cover edge, and the ring member. , provided between the fastening point and the fitting groove , the distance between the fastening point and the fitting groove at the opening edge in the box-outside direction is equal to the distance between the fastening point at the opening edge and the opening. This is an electrical connection box that is wider than the distance between the inside and outside of the box up to the outer surface of the edge .

The case body and the cover body may be made of metal or resin. Furthermore, when the case body and the cover body are made of metal, they contain the same kind of metal or a different kind of metal as the fastening material.
Powder-like foreign matter refers to powder-like substances or granules that can enter through the sealing edge. For example, abrasion particles generated due to friction between the fastening material and the case body and cover body, powder particles generated due to the difference in material between the fastening material and the case body and cover body, sand and dust entering from the outside of the electrical connection box, etc. Contains dust, etc.

The foreign matter intrusion suppressing portion may be of any type as long as it can suppress the intrusion of powdery foreign matter into the abutting portions of the opening edge, the cover edge, and the ring member. For example, a groove or step structure provided between the fastening point and the fitting groove, a groove provided in the fitting groove, a rough surface part or an adhesive part provided between the case body and the cover body, etc. It also includes separate parts and different configurations.

According to this invention, the foreign matter intrusion suppressing portion provided between the fastening portion and the fitting groove can suppress the intrusion of powdery foreign matter into the fitting groove side. Therefore, it is possible to suppress the powdery foreign matter from interfering with the ring member and deteriorating the ring member, and it is possible to maintain water-stopping properties.

Further, as an aspect of the present invention, the distance between the fastening point at the opening edge and the fitting groove in the box-outside direction is the same as the distance between the fastening point at the opening edge and the outer surface of the opening edge in the box-outside direction. Since the distance between the fastening point and the fitting groove at the edge of the opening can be increased in the direction of the inside and outside of the box, it is possible to further suppress powder foreign matter from entering the fastening point from the outside. .

As an aspect of the present invention, a distance between the fastening point and the fitting groove at the opening edge in the box-outside direction may be wider than the wall thickness of the case body.
The above-mentioned wall thickness of the case body is the normal wall thickness of the case body, and specific examples include the average wall thickness of the case body and the case where a part of the case body is configured extremely thick. Refers to the wall thickness of the area excluding that area.

According to this invention, since the distance between the fastening point and the fitting groove in the box outward and outward directions is wider than the wall thickness, the distance from the fastening point to the abutment point between the opening edge and the cover edge and the ring member is increased. can do. Therefore, even if powdery foreign matter enters between the fastening part and the fitting groove, the powdery foreign material will not enter the opening edge and the contact area between the cover edge and the ring member. can be suppressed.

In addition, since the distance between the fastening point at the opening edge and the fitting groove in the box-internal and external directions is wider than the wall thickness of the case body, it is easy to reliably provide a foreign matter intrusion prevention section along the box-internal and external directions, and it is also possible to prevent multiple foreign objects from entering. An intrusion suppressing portion may also be provided. Therefore, it is possible to further suppress powder foreign matter from entering into the abutment areas between the opening edge and the cover edge and the ring member.

Moreover, as an aspect of the present invention, the foreign matter intrusion suppressing part may be configured with an inner groove part provided between the fastening part and the fitting groove, and having a groove bottom lower than the fastening part.
The term "lower than the above-mentioned fastening point" refers to being lower than the abutment surface between the opening edge and the cover edge at a point corresponding to the fastening point of the sealing edge.

Further, the inner groove portions may be provided continuously or at predetermined intervals along the fitting groove.

According to this invention, powder foreign matter that has entered the fitting groove side from the fastening material side can be dropped into the inner groove part, so that the powder foreign matter can be dropped to the abutment area between the opening edge and the cover edge and the ring member. Intrusion of foreign matter can be further suppressed.

Further, as an aspect of the present invention, the inner groove portion may penetrate to the outside of the sealing edge portion.
The above-mentioned "penetrating to the outside" includes a case where a part or all of the bottom of the inner groove part penetrates to the outside of the sealing edge.

According to this invention, the powdery foreign matter can be discharged to the outside of the sealing edge, so that the powdery foreign matter does not accumulate in the inner groove, and the powdery foreign matter can be discharged from the opening edge, the cover edge, and the ring. Intrusion into the contact area with the member can be further suppressed.

Further, as an aspect of the present invention, the cover edge portion may be provided with an inner groove fitting convex portion that fits into the inner groove portion.
According to the present invention, it is possible to further suppress the movement of powdery foreign matter accumulated in the inner groove above the groove bottom of the inner groove. Therefore, it is possible to suppress the powder foreign matter accumulated in the inner groove from moving toward the fitting groove side.

Further, as an aspect of the present invention, an outer groove portion having a groove bottom lower than the fastening location may be formed on the outside of the box from the fastening location.
The term "lower than the above-mentioned fastening point" refers to being lower than the abutment surface between the opening edge and the cover edge at a point corresponding to the fastening point of the sealing edge.

The outer groove portion may have a groove bottom that is inclined or may be horizontal when the electrical connection box is mounted on a vehicle.
According to this invention, since the fastening point is located higher than the groove bottom of the outer groove, powdery foreign matter that enters through the gap in the sealing edge is prevented from accumulating in the outer groove without being able to go beyond the fastening point. Become. Therefore, it is possible to further suppress the movement of powdery foreign matter to the inside of the box beyond the fastening location.

Further, as an aspect of the present invention, the cover edge may be provided with an outer groove fitting convex portion that fits into the outer groove portion.
According to this invention, since the outer groove fitting convex part can prevent the powdery foreign matter accumulated in the outer groove from moving upward from the groove bottom of the outer groove, the powdery foreign matter accumulated in the outer groove can be , movement toward the fitting groove can be further suppressed.

Further, as an aspect of the present invention, the foreign matter intrusion suppressing section is provided on at least one of opposing surfaces of the opening edge and the cover edge that constitute the sealing edge. It may be configured with a rough surface portion that is rougher than the surface of the portion.

The rough surface portion refers to a state in which an uneven shape is formed that is approximately the same size as the powdery foreign material or larger than the size of the powdery foreign material. Note that the rough surface portion may have a concavo-convex shape arranged regularly or irregularly. Further, the rough surface portion may be provided on all or part of at least one of the above-mentioned opposing surfaces.

Note that the surface roughness may be calculated based on a generally defined value. That is, the calculation method is not particularly limited, and may be calculated using, for example, the arithmetic mean roughness Ra, the ten-point mean roughness Rz, or the average interval of the uneven shapes.

According to this invention, since the rough surface portion has a larger coefficient of friction than other portions, powdery foreign matter that has entered the sealing edge can be adhered to the rough surface portion. As a result, it is possible to suppress the powdery foreign matter from moving toward the fitting groove side rather than the rough surface portion, and to further prevent powdery foreign matter from entering the fitting groove which is arranged closer to the fitting groove side than the rough surface portion. It can definitely be suppressed.

Further, as an aspect of the present invention, the foreign matter intrusion suppressing portion may include an adhesive that is provided on at least one of opposing surfaces of the opening edge and the cover edge that constitute the sealing edge. It may be composed of parts.

According to the present invention, powdery foreign matter that has entered the sealing edge can be made to adhere to the adhesive portion, and therefore movement of the powdery foreign matter toward the fitting groove side from the adhesive portion can be further suppressed. Therefore, it is possible to prevent powder-like foreign matter from entering the fitting groove and interfering with the ring member, thereby preventing the ring member from deteriorating.

Further, as an aspect of the present invention, the foreign matter intrusion suppressing portion may be provided in a fastening hole to which the fastening material is fastened, which is formed at a fastening location on the edge of the opening.
The above-mentioned provision in the fastening hole includes cases in which it is provided at the bottom of the fastening hole, cases in which it is provided in the opening portion of the fastening hole, and cases in which it is provided in the side surface of the fastening hole.

According to this invention, it is possible to suppress movement of powdery foreign matter toward the fitting groove side rather than the fastening hole.
Specifically, it is possible to prevent powder-like foreign matter that has entered from the outside from falling into the fastening hole and moving from the inside of the fastening hole to the fitting groove side. Further, it is possible to suppress powdery foreign matter caused by friction between the fastening material and the fastening hole, or powdery foreign matter caused by corrosion of the fastening material from moving from the fastening hole to the fitting groove side.

Furthermore, by fastening and fixing the case body and the cover body, the fastening holes are covered with the fastening material, which prevents powder-like foreign matter accumulated in the fastening holes from being discharged to the outside. , movement toward the fitting groove can be further suppressed.

Further, as an aspect of the present invention, the foreign matter intrusion suppressing portion may include an upper end recess formed at a peripheral edge of an upper end opening of the fastening hole.
The upper end recess includes a truncated cone shape such as a truncated cone or a truncated square pyramid, and a columnar shape such as a cylinder or a polygonal prism.

According to the present invention, since the powdery foreign matter can be accumulated in the upper end recess, it is possible to suppress the powdery foreign matter from moving toward the fitting groove side. In particular, powdery foreign matter generated by fastening the fastening material and powdery foreign matter caused by corrosion between the fastening material and the cover body can be accumulated in the upper end recess.

Further, as an aspect of the present invention, the foreign matter intrusion suppressing portion may be configured with a tapered portion that is formed at a peripheral edge of an upper end opening of the fastening hole and gradually slopes upward in a diameter expanding direction.
According to this invention, it is possible to accumulate powdery foreign matter in the upper end recessed portion, and also to guide the powdery foreign matter to the fastening hole along the tapered portion. Thereby, powdery foreign matter can be reliably accumulated in the fastening hole.

In addition, when fastening and fixing the case body and the cover body, the tapered part can guide the fastening material into the fastening hole, making it easy to fasten the fastening material. This can prevent unnecessary contact with. Thereby, the case body and the cover body can be securely fastened and fixed, and generation of powdery foreign matter due to unnecessary contact can be suppressed.

Further, as an aspect of the present invention, the foreign matter intrusion suppressing section is configured of a bottom space formed between the bottom of the fastening hole and the tip of the fastening material, into which the powdery foreign matter can enter. You can.
According to the present invention, for example, powdery foreign matter that has entered through the gap between the sealing edges or that has occurred between the fastening material and the fastening hole can be accumulated in the bottom space. Moreover, since the bottom space can be closed with the fastening material, it is possible to more reliably suppress powder-like foreign matter accumulated in the bottom space from moving toward the fitting groove side.

Further, as an aspect of the present invention, the foreign matter intrusion suppressing portion may be configured with an inner stepped portion in which the fitting groove side is higher than the fastening portion.
According to this invention, since the outside of the box of the fitting groove is higher than the fastening part, it is possible to prevent powder-like foreign matter from moving from the fastening part to the fitting groove. Thereby, it is possible to further suppress the powdery foreign matter from moving toward the fitting groove.

Further, as an aspect of the present invention, the foreign matter intrusion suppressing section may be configured with an internal space formed inside the sealing edge and extending along the inner step.
According to the present invention, powdery foreign matter can be accumulated in the internal space, and therefore movement of the powdery foreign matter toward the fitting groove can be more reliably suppressed.

Further, as an aspect of the present invention, an outer stepped portion may be formed on the outer side of the box from the fastening location, in which the outer side of the box is lowered.
According to this invention, since the fastening point at the sealing edge is higher than the outside of the box, movement of powder-like foreign matter from outside the box through the gap in the sealing edge to the fastening point is prevented. Can be done. Thereby, it is possible to more reliably suppress the powdery foreign matter from moving toward the fitting groove side.

Further, as an aspect of the present invention, the foreign matter intrusion suppressing portion may be constituted by an in-groove recess provided on the outer side of the ring member on the bottom surface of the fitting groove.
According to this invention, powder-like foreign matter that has entered the fitting groove can be accumulated in the groove recess. Thereby, interference of powdery foreign matter with the ring member can be suppressed.

Further, as an aspect of the present invention, the foreign matter intrusion suppressing portion may have a groove bottom surface of the fitting groove formed with an inclined bottom surface that is lower on the outside of the box.
According to this invention, powder-like foreign matter that has entered the fitting groove can be guided to the outside of the box inside the fitting groove. Thereby, it is possible to prevent powdery foreign matter from interfering with the ring member.

Moreover, as an aspect of the present invention, the case body and the cover body may be made of a metal material.
According to this invention, the strength of the electrical junction box can be improved, and even if metal powder foreign matter is generated between the case body, cover body, and fastening material, the inside of the fitting groove can be improved. can prevent powdery foreign matter from entering.

INDUSTRIAL APPLICABILITY The present invention can provide an electrical connection box that can suppress the intrusion of powdery foreign matter.

A schematic perspective view of an electrical connection box. FIG. 2 is a schematic exploded perspective view of an electrical connection box. A plan view of an electrical connection box. An enlarged cross-sectional view of the sealing edge. FIG. 7 is an enlarged cross-sectional view of a sealing edge in another embodiment. FIG. 7 is an enlarged cross-sectional view of a sealing edge in another embodiment. FIG. 7 is an enlarged cross-sectional view of a sealing edge in another embodiment. FIG. 7 is an enlarged cross-sectional view of a sealing edge in another embodiment. FIG. 7 is an enlarged cross-sectional view of a sealing edge in another embodiment. FIG. 7 is an enlarged cross-sectional view of a sealing edge in another embodiment.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.
The electrical connection box 1 of this embodiment is placed, for example, in the engine room of a vehicle. Such an electrical connection box 1 will be explained based on FIGS. 1 to 4.

FIG. 1 shows a schematic perspective view of the electrical connection box 1, and FIG. 2 shows a schematic exploded perspective view of the electrical connection box 1. 3 shows a plan view of the lower case 10 constituting the electrical connection box 1, and FIG. 4 shows a sectional view taken along the line AA in FIG.
Note that FIGS. 5 to 10 show cross-sectional views taken along the line AA in another embodiment of the electrical connection box 1.

Here, the vertical direction in FIG. 1 is the vertical direction Z, the width direction of the electrical junction box 1 (the direction connecting the upper left and lower right in FIG. 1) is the width direction W, and the depth direction of the electrical junction box 1 (the direction connecting the upper left and lower right in FIG. 1, the direction connecting the lower left and upper right) is defined as the depth direction H. In the vertical direction Z, the upper side is defined as an upward direction Zu, and the lower side is defined as a downward direction Zd.
Further, the inside-outside direction of the box is defined as the box-outside direction X, the inside direction of the box is defined as the box-inside direction IN, and the box-outside direction is defined as OUT. Note that these directions are the same in FIGS. 2 to 10 for convenience.

The electrical junction box 1 is an aluminum die-cast product housing in which electronic components such as fuses and bus bars are housed. It is electrically connected to electronic devices placed in the room.

As shown in FIGS. 1 and 2, the electrical connection box 1 includes a lower case 10, an upper case 20, and a ring member 30 sandwiched between the lower case 10 and the upper case 20. The electrical connection box 1 is assembled by fastening and fixing the lower case 10 and the upper case 20 with bolts 40.

First, the bolts 40 that fasten and secure the lower case 10 and the upper case 20 will be explained. The bolt 40 is a fastening material made of iron, and as shown in FIG. 2, it is integrally composed of a cylindrical bolt head 41 and a bolt tip 42 extending downward from the bolt head 41 in a downward direction Zd. . This bolt tip 42 is provided with a thread so that it can be screwed into the bolt.

The lower case 10 constituting the electrical connection box 1 is an internally hollow casing having an opening O with an upward direction Zu, and a space for accommodating electronic components is formed inside. As shown in FIGS. 1 to 4, the lower case 10 is composed of a lower bottom surface portion 11, a lower side surface portion 12, a lower edge portion 13, and a lower side fastening portion 14.

As shown in FIGS. 1 to 3, the lower bottom surface portion 11 is a flat plate having a substantially rectangular shape in plan view, and constitutes the bottom surface of the electrical connection box 1. A lower side surface portion 12 stands up from the outer edge of the lower bottom surface portion 11. Note that the lower bottom surface portion 11 and the lower side surface portion 12 have the same thickness, and their length is defined as a first length L1.

The lower edge portion 13 is a protruding piece that protrudes from the outer edge of the lower side surface portion 12 toward the outside direction OUT of the electrical connection box 1, and has a predetermined thickness. The length by which this lower edge portion 13 protrudes toward the box outside direction OUT of the lower case 10 is a second length L2. This second length L2 is configured to be longer than the first length L1, which is the thickness of the lower side surface portion 12.

In the box inner direction IN of the lower edge portion 13 configured as described above, a fitting groove 50 recessed toward the downward direction Zd is formed in an annular shape along the outer edge of the lower side surface portion 12.
As shown in FIG. 4, the fitting groove 50 includes a fitting groove main body 51 and an in-groove recess 52 provided at the bottom of the fitting groove main body 51 on the outside of the box.

The fitting groove body 51 is a groove provided at the end of the lower edge 13 in the box inner direction IN, and has a concave cross-sectional shape when viewed from a plane along the box inner-outer direction X. . Note that the groove width of the fitting groove main body 51 along the box inward-outward direction X is approximately twice the groove depth along the up-down direction Z.

The in-groove recess 52 is a groove depressed in the downward direction Zd at the end of the bottom surface (main body bottom surface 51a) of the fitting groove main body 51 in the box outside direction OUT, and the bottom surface of the in-groove recess 52 (recess bottom surface 52a) is inclined in the downward direction Zd as it goes toward the box outer direction OUT.

Further, as shown in FIGS. 1 and 2, lower side fastening portions 14 are provided at each corner portion of the lower edge portion 13 and at the center portion of the side along the width direction W. As shown in FIGS. This lower side fastening part 14 is a fastening part for screwing together the bolt 40 that fastens and fixes the lower case 10 and the upper case 20. A cylindrical hole portion 15 having a cylindrical shape with a bottom is provided.

As shown in FIGS. 2 and 4, the cylindrical hole portion 15 includes a cylindrical inner surface 15a, a cylindrical bottom surface 15b, and an inclined edge 15c.
The cylindrical inner surface 15a is a cylindrical inner circumferential surface having the same inner diameter as the outer diameter of the bolt tip 42, and has a threaded groove (not shown) configured to be able to be screwed into the thread of the bolt tip 42 on the surface. is provided.

The cylindrical bottom surface 15b is a bottom surface provided at the end of the cylindrical inner surface 15a in the downward direction Zd. As shown in FIG. 4, when the lower case 10 and the upper case 20 are fastened and fixed with the bolts 40, the cylindrical bottom surface 15b is arranged in the downward direction Zd from the end of the bolt tip 42 in the downward direction Zd. There is. That is, when the lower case 10 and the upper case 20 are fastened and fixed with the bolts 40, a bottom space S1 is formed between the bottom surface of the bolt tip 42 and the cylindrical bottom surface 15b.

As shown in FIG. 4, the slanted edge 15c is slanted radially outward from the end of the cylindrical inner surface 15a in the upper direction Zu as it goes in the upward direction Zu. The upper surface of the edge portion 13 is connected to the upper surface of the edge portion 13.

As shown in FIG. 4, the length from the cylindrical hole portion 15 in the box outside direction OUT to the end of the lower side fastening portion 14 in the box outside direction OUT is defined as a third length L3, and the length of the cylindrical hole portion 15 inside the box The length from the direction IN to the end of the fitting groove 50 in the box outer direction OUT is defined as a fourth length L4. The cylindrical hole portion 15 and the fitting groove 50 configured as described above are arranged such that the fourth length L4 is longer than the first length L1 and the third length L3.

Furthermore, as shown in FIG. 4, a bottomed inner groove portion 61 recessed in the downward direction Zd from the upper surface of the lower edge portion 13 is fitted into the intermediate portion between the fitting groove 50 and the cylindrical hole portion 15. It is provided along the groove 50. The depth of the inner groove 61 is approximately the same as that of the fitting groove 50, and the groove bottom is located lower than the upper surface of the lower edge 13 at the location where the bolt 40 is fastened to the cylindrical hole 15.

The upper case 20 is a lid that closes the opening O of the lower case 10, and as shown in FIG. It is made up of.

The upper top surface part 21 is a flat plate having a substantially rectangular shape in plan view, like the lower bottom surface part 11, and constitutes the top surface of the electrical connection box 1. An upper side surface portion 22 stands from the outer edge of the upper upper surface portion 21 in a downward direction Zd.

As shown in FIGS. 1 to 4, the upper edge portion 23 is a protruding piece that protrudes from the outer edge of the upper side surface portion 22 toward the outside of the electrical connection box 1, and the amount of protrusion is determined by the amount of the lower edge portion relative to the lower side portion 12. It is equal to the amount of protrusion (second length L2) of the edge 13. Further, upper side fastening portions 24 are provided at the center portion and each corner portion of the side along the width direction W of this upper edge portion 23.

Similar to the lower side fastening part 14, this upper side fastening part 24 is a fastening part for inserting and fixing a bolt 40, which is a fastening material, and has an upper side that penetrates in the central part along the vertical direction Z. An insertion hole 25 is provided. The inner diameter of the upper insertion hole 25 is configured to be equal to the outer diameter of the bolt tip 42, and the inner circumferential surface of the upper insertion hole 25 (insertion port inner circumferential surface 25a) has a screw thread of the bolt tip 42. A screw groove (not shown) for screwing is provided.

In the box inner direction IN of the upper side insertion hole 25, an inner groove fitting protrusion 62 that protrudes in the downward direction Zd is attached to the upper side surface portion 22 in the assembled state in which the lower case 10 and the upper case 20 are assembled. It is erected along the outer periphery of the More specifically, the inner groove fitting projection 62 is disposed at a position facing the inner groove 61 when the lower case 10 and the upper case 20 are assembled. Note that this inner groove fitting protrusion 62 has the same height as the depth of the inner groove part 61.

The ring member 30 is an elastic rubber O-ring having an annular shape. As shown in FIG. 2, the ring member 30 includes a ring body 31 provided in an annular shape and a ring convex portion 32 that projects outward from the ring body 31.

The ring body 31 is an annular body having a substantially perfect circular cross section, and is configured so that its total length is slightly shorter than the total length of the fitting groove body 51. Further, the cross-sectional diameter of the ring body 31 is configured to be slightly longer than the depth of the fitting groove body 51 and approximately half the width of the fitting groove body 51.

As shown in FIG. 2, the ring convex portion 32 protrudes on both sides along one of the directions perpendicular to the axial direction of the ring body 31. The amount of protrusion of this ring convex portion 32 is approximately one fourth of the outer diameter of the ring body 31. A plurality of ring protrusions 32 configured as described above are provided along the ring main body 31 at predetermined intervals (six in this embodiment).

The electrical junction box 1 can be assembled by fitting the ring member 30 configured in this way into the fitting groove 50 provided in the lower edge 13 and fastening and fixing the lower case 10 and the upper case 20 with bolts 40. . Further, the electrical connection box 1 in which the lower case 10 and the upper case 20 are assembled in this manner includes a sealing edge 2 that is composed of a lower edge 13 and an upper edge 23 that face each other.

Note that the ring member 30 fitted into the fitting groove 50 is configured such that the total length of the ring body 31 is slightly shorter than the total length of the fitting groove body 51, so as shown in FIG. It is arranged in the fitting groove main body 51 so as to come into contact with the box inner side surface of the fitting groove main body 51. Further, as shown in FIG. 4, the ring member 30 fitted into the fitting groove main body 51 is subjected to surface pressure by the upper edge 23, and has an elliptical cross section.

Further, in the central portion of the cylindrical hole 15 and the fitting groove 50 in the sealing edge 2, the inner groove fitting protrusion 62 fits into the inner groove 61. The inner groove portion 61 and the inner groove fitting protrusion 62 thus fitted constitute an inner intrusion suppressing portion 60 along the outer edge of the fitting groove 50.

In this sealing edge 2, a cylindrical hole portion 15, an inner intrusion suppressing portion 60, and an in-groove recess 52 are arranged in this order from the box outer direction OUT to the box inner direction IN. This inner intrusion suppressing portion 60 prevents dust such as sand and dust from entering from the outside, abrasion powder generated by abrasion between the bolt 40 and the cylindrical hole portion 15, and metal types of the lower case 10, upper case 20, and bolt 40. Powdery foreign matter such as powder or granular material caused by the difference is suppressed from entering into the fitting groove 50.

In this way, the electrical junction box 1 includes a lower case 10 having an opening O and a lower edge 13, and an upper case 20 having an upper edge 23 that closes the opening O of the lower case 10 and meets the lower edge 13. It is equipped. Further, a ring member 30 made of rubber is provided which is fitted into a fitting groove 50 formed in the lower edge portion 13. Then, the lower edge 13 and the upper edge 23 are combined to form a sealing edge 2 for sealing, and the cylindrical hole 15 of the sealing edge 2 is fastened through the upper edge 23. A bolt 40 is provided. Further, an inner intrusion suppressing part 60 that suppresses intrusion of powdery foreign matter into the abutment areas between the lower edge 13 and the upper edge 23 and the ring member 30 is provided between the cylindrical hole part 15 and the fitting groove 50. It is set in.

Thereby, the inner intrusion suppressing part 60 provided between the cylindrical hole part 15 and the fitting groove 50 can suppress intrusion of powdery foreign matter into the box inner direction IN. Thereby, deterioration of the ring member 30 by powdery foreign matter can be suppressed, and water-stopping properties can be maintained.

More specifically, the lower case 10 and the upper case 20 are made of aluminum, which is a metal material, and the bolts 40 that fasten and fix the lower case 10 and the upper case 20 are made of iron. If water enters between the lower case 10 and upper case 20 and the bolts 40, powder-like foreign matter may be generated due to differences in ionization tendency.

Furthermore, external powdery foreign matter such as sand or dust may enter between the lower edge 13 and the upper edge 23. Furthermore, abrasion powder (powder-like foreign matter) may be generated due to friction caused by fastening and fixing the bolt 40 to the cylindrical hole portion 15 and the upper side insertion hole 25.

These powder-like foreign substances may interfere with the rubber ring member 30, thereby damaging or deteriorating the ring member 30. However, by providing the inner intrusion suppressing portion 60 between the cylindrical hole portion 15 and the fitting groove 50, it is possible to suppress powder-like foreign matter from entering in the box inner direction IN.

Furthermore, since the distance between the cylindrical hole 15 and the fitting groove 50 at the lower edge 13 in the box outward and outward direction X (fourth length L4) is wider than the wall thickness (first length L1) of the lower case 10, the lower edge 13 and the distance to the contact point between the upper edge 23 and the ring member 30 can be increased. As a result, even if powder-like foreign matter enters between the cylindrical hole portion 15 and the fitting groove 50, the powder-like foreign matter will not be present at the contact points between the lower edge 13 and the upper edge 23 and the ring member 30. It can prevent foreign substances from entering the body.

Furthermore, since the interval between the cylindrical hole 15 and the fitting groove 50 in the lower edge 13 in the box-internal and external directions It is also possible to provide a plurality of inner intrusion suppressing parts 60 easily. Therefore, it is possible to further suppress powdery foreign matter from entering the contact portions between the lower edge 13 and the upper edge 23 and the ring member 30.

Furthermore, the distance (fourth length L4) between the cylindrical hole 15 in the lower edge 13 and the fitting groove 50 in the box-outside/outside direction It is wider than the interval (third length L3) in the box inside-outside direction X up to. Thereby, the distance between the cylindrical hole portion 15 and the fitting groove 50 in the lower edge portion 13 in the box-external direction X can be increased. Therefore, it is possible to further suppress powder foreign matter entering from the outside from entering into the cylindrical hole portion 15.

Further, by providing an inner groove portion 61 between the cylindrical hole portion 15 and the fitting groove 50, the groove bottom of which is lower than the upper surface of the lower edge portion 13 where the cylindrical hole portion 15 is provided, Powder-like foreign matter that has entered from OUT to the inside direction IN of the box can fall into the inner groove portion 61. For this reason, it is possible to further suppress the intrusion of powdery foreign matter into the contact portions between the lower edge 13 and the upper edge 23 and the ring member 30.

Furthermore, since the upper edge 23 is provided with the inner groove fitting protrusion 62 that fits into the inner groove 61, foreign powder particles dropped into the inner groove 61 can be removed from the bottom of the inner groove 61. It is possible to further suppress the upward movement of the particles. Therefore, the powder foreign matter accumulated in the inner groove portion 61 can be suppressed from moving in the box inner direction IN.

Further, the cylindrical hole 15 to which the bolt 40 formed in the lower fastening portion 14 of the lower edge portion 13 is fastened can suppress movement of powdery foreign matter in the box inner direction IN from the cylindrical hole 15.
Specifically, when powdery foreign matter that has entered from the outside falls into the cylindrical hole portion 15, it is possible to suppress the powdery foreign material from moving from the inside of the cylindrical hole portion 15 toward the inside direction IN of the box. In addition, it is possible to suppress powdery foreign matter caused by friction of the bolt 40 with the cylindrical hole 15 or corrosion of the bolt 40 from moving from the cylindrical hole 15 toward the inside direction IN of the box.

Furthermore, by fastening and fixing the lower case 10 and the upper case 20, the cylindrical hole 15 is closed with the bolt 40, so that powdery foreign matter accumulated in the cylindrical hole 15 is prevented from being discharged to the outside. It is possible to suppress the movement toward the inner side of the box IN.

Further, since the inclined edge 15c is provided at the peripheral edge of the upper end opening of the cylindrical hole 15, powdery foreign matter can be accumulated on the inclined edge 15c, and the powdery foreign matter is directed toward the inside of the box. Movement to IN can be suppressed. In particular, powdery foreign matter generated when the bolt 40 is fastened to the upper side insertion hole 25 or due to corrosion between the bolt 40 and the upper side insertion hole 25 is accumulated on the inclined edge 15c. be able to.

Furthermore, the inclined edge 15c formed at the peripheral edge of the upper end opening of the cylindrical hole 15 is configured to gradually incline in the diameter expanding direction toward Zu. Thereby, the powdery foreign matter can be accumulated on the inclined edge 15c, and the powdery foreign matter can be guided into the cylindrical hole 15 along the inclined edge 15c. Therefore, powdery foreign matter can be reliably accumulated in the cylindrical hole 15.

Further, when fastening and fixing the lower case 10 and the upper case 20, the inclined edge 15c can guide the bolt 40 into the cylindrical hole 15, so that the bolt 40 can be easily fastened. Unnecessary contact with parts other than the fastened part can be prevented. Thereby, the lower case 10 and the upper case 20 can be securely fastened and fixed, and the generation of powder-like foreign matter due to unnecessary contact can be suppressed.

Further, a bottom space S1 is formed between the bottom of the cylindrical hole 15 and the tip of the fastened bolt 40, into which powder-like foreign matter can enter. This prevents, for example, powdery foreign matter that has entered through the gap between the lower edge 13 and the upper edge 23 or that has occurred between the bolt 40 and the cylindrical hole 15 from accumulating in the bottom space S1. Can be done. Moreover, since the bottom space S1 can be closed with the bolt 40, it is possible to more reliably suppress the powdery foreign matter accumulated in the bottom space S1 from moving in the box inner direction IN.

In addition, since the fitting groove 50 is configured with an in-groove recess 52 provided on the outside of the ring member 30 on the bottom surface 51a of the main body, powder-like foreign matter that has entered the fitting groove 50 can be removed from the in-groove recess 52. Can be accumulated. Thereby, interference of powdery foreign matter with the ring member 30 can be suppressed.

In addition, since the groove bottom surface of the fitting groove 50 is configured with a concave bottom surface 52a that is lower on the outside of the box, powder-like foreign matter that has entered the fitting groove 50 is removed from the outside of the box inside the fitting groove 50. I can guide you. Thereby, it is possible to prevent powdery foreign matter from interfering with the ring member 30.

Furthermore, since the lower case 10 and the upper case 20 are made of metal material, the strength of the electrical connection box 1 can be improved. Furthermore, even if powdery foreign matter is generated between the lower case 10 and the upper case 20 and the bolts 40, the foreign powdery matter can be prevented from entering the fitting groove 50.

Next, an electrical connection box 1w of a second embodiment shown in FIG. 5 will be described.
The electrical connection box 1w has the same configuration as the above-described electrical connection box 1 and has the same effects, but has a characteristic configuration that provides further effects. In the following, the same reference numerals will be given to the same components as in the electrical junction box 1 in the electrical junction box 1w, and the explanation thereof will be omitted, and the characteristic components will be explained in detail. Similarly, in the description of other embodiments to be described later, characteristic configurations of each embodiment will be explained.

In the assembled state in which the lower case 10 and the upper case 20 are assembled, the electrical junction box 1 has a cylindrical hole portion 15, an inner intrusion prevention portion 60, and a fitting groove from a box outer direction OUT to a box inner direction IN. 50 are arranged in this order on the sealing edge 2.

Similar to the electrical junction box 1, the electrical junction box 1w has a cylindrical hole portion 15, an inner intrusion suppressing portion 60w corresponding to the inner intrusion suppressing portion 60, and a fitting portion from the box outer direction OUT to the box inner direction IN. Grooves 50 are arranged in the sealing edge 2 in this order.

This inner intrusion suppressing portion 60w has a through hole 63 that penetrates downward Zd at the end of the bottom surface of the inner groove portion 61 (inner groove bottom surface 61a) in the box inner direction IN, and is arranged in a predetermined position along the fitting groove 50. They are placed at intervals.

In this way, the electrical junction box 1w can discharge powder foreign matter to the outside of the sealing edge 2 by providing the through hole 63 that penetrates to the outside of the sealing edge 2 in the inner groove bottom surface 61a. . This prevents powdery foreign matter from accumulating in the inner groove portion 61 and further suppresses powdery foreign matter from entering the abutting portions of the lower edge 13 and the upper edge 23 and the ring member 30.

In the electrical connection box 1w, the through hole 63 penetrates from the bottom surface of the inner groove portion 61 in the downward direction Zd. However, for example, when the inner intrusion suppressing parts 60w are arranged at predetermined intervals along the fitting groove 50, not only a part of the bottom surface of the inner intrusion suppressing part 60w but also the inner intrusion suppressing part 60w may penetrate down to the lower edge Zd of the lower edge 13.

Next, an electrical connection box 1x according to a second embodiment shown in FIG. 6 will be described.
The electrical connection box 1x has the same configuration as the above-described electrical connection box 1, and has the same effects, but has a characteristic configuration that provides further effects. In the following, the same reference numerals will be given to the same components as in the electrical junction box 1 in the electrical junction box 1x, and the explanation thereof will be omitted, and the characteristic components will be explained in detail. Similarly, in the description of other embodiments to be described later, characteristic configurations of each embodiment will be explained.

In the assembled state in which the lower case 10 and the upper case 20 are assembled, the electrical junction box 1 has a cylindrical hole portion 15, an inner intrusion suppressing portion 60, and a fitting groove 50 from the outer side of the box OUT to the inner side of the box IN. are arranged in this order on the sealing edge 2.

On the other hand, in the electrical junction box 1x, similarly to the electrical junction box 1, the cylindrical hole part 15, the rough surface part 70, and the fitting groove 50 are arranged in this order from the box outer direction OUT to the box inner direction IN. It is arranged at the sealing edge 2. That is, in the electrical connection box 1x, a rough surface portion 70 is provided between the cylindrical hole portion 15 and the fitting groove 50 instead of the inner intrusion suppressing portion 60.

This rough surface portion 70 is an uneven surface provided on the upper surface of the lower edge portion 13 and the bottom surface of the upper edge portion 23 that face each other in the central portion of the sealing edge portion 2 in the box-external and external directions X. It is provided in the direction OUT of the groove 50 toward the outside of the box.

The rough surface portion 70 includes a lower rough surface portion 71 provided on the upper surface of the lower edge portion 13 and an upper rough surface portion 72 provided on the bottom surface of the upper edge portion 23 . The lower rough surface portion 71 and the upper rough surface portion 72 have an uneven shape in which concave portions and convex portions are irregularly arranged. The average value of the difference in height between the bottom of the concave portion and the apex portion of the convex portion is configured to be larger than the size of the powdery foreign object. Therefore, the friction coefficient of the rough surface portion 70 is larger than that of the other portions of the lower edge 13 and the upper edge 23.
In this embodiment, when the lower case 10 and the upper case 20 are assembled, the lower rough surface portion 71 and the upper rough surface portion 72 are provided so as to mesh with each other.

In this way, the electrical junction box 1x is provided with a rough surface portion 70 whose surface roughness is rougher than that of the other portions, on the opposing surfaces of the lower edge portion 13 and the upper edge portion 23 that constitute the sealing edge portion 2. ing. Since this rough surface portion 70 has a larger coefficient of friction than other portions, powdery foreign matter that has entered the sealing edge 2 is adhered to the rough surface portion 70.

Note that the surface roughness of the rough surface portion 70 may be calculated based on a generally defined value. That is, there is no particular limitation on the calculation method, and for example, it can be calculated using the arithmetic average roughness Ra, the ten-point average roughness Rz, or the average interval of the uneven shapes.

As a result, in the electrical connection box 1x, it is possible to suppress the powdery foreign matter from moving in the box inner direction IN than the rough surface portion 70, and the powder particles can be suppressed from moving in the box inner direction IN than the rough surface portion 70. Intrusion of foreign matter can be more reliably suppressed.

In the electrical junction box 1x, the rough surface portions 70 are provided on the top surface of the lower edge 13 and the bottom surface of the upper edge 23, respectively. Only the rough surface portion 70 may be provided. Further, in the assembled state of the lower case 10 and the upper case 20, the lower rough surface portion 71 and the upper rough surface portion 72 do not need to mesh with each other.

Further, the rough surface portion 70 may have an uneven shape arranged regularly, and furthermore, the uneven shape of the rough surface portion 70 has an average value of the difference in height between the bottom of the concave portion and the apex portion of the convex portion. It may be approximately the same size as the powder foreign matter.

Further, in the electrical connection box 1x, a rough surface portion 70 is provided between the cylindrical hole portion 15 and the fitting groove 50, but instead of the rough surface portion 70, an adhesive portion 70x having adhesiveness may be provided ( (See Figure 7). Note that in the electrical connection box 1x illustrated in FIG. 7, the adhesive portion 70x is provided only on the upper surface of the lower edge portion 13.

As a result, the powdery foreign matter that has entered the sealing edge 2 can be made to adhere to the adhesive portion 70x, so that the powdery foreign matter can be further suppressed from moving in the box inner direction IN than the adhesive portion 70x. Therefore, powder-like foreign matter can be prevented from entering the fitting groove 50 and interfering with the ring member 30, thereby preventing the ring member 30 from deteriorating.

Next, an electrical connection box 1y according to a fourth embodiment shown in FIG. 8 will be described.
The electrical connection box 1y has the same configuration as the above-described electrical connection box 1, and provides similar effects, but has a characteristic configuration that provides further effects. In the following, the same reference numerals will be given to the same components as in the electrical junction box 1 in the electrical junction box 1y, and the explanation thereof will be omitted, and the characteristic components will be explained in detail. Similarly, in the description of other embodiments to be described later, characteristic configurations of each embodiment will be explained.

As shown in FIG. 4, in the assembled state in which the lower case 10 and the upper case 20 are assembled, the electrical connection box 1 has a cylindrical hole portion 15 and an inner intrusion prevention portion extending from the box outer direction OUT to the box inner direction IN. 60 and the fitting groove 50 are arranged in this order on the sealing edge 2.

On the other hand, in the electrical junction box 1y, similarly to the electrical junction box 1, the cylindrical hole part 15, the inner intrusion suppressing part 60, and the fitting groove 50 are arranged from the box outer direction OUT to the box inner direction IN. In addition to being arranged in the sealing edge 2 in this order, an outer restraining part 80 is provided in the box outer direction OUT of the cylindrical hole part 15.

As shown in FIG. 8, the outer restraining part 80 is provided in the box outer direction OUT of the cylindrical hole part 15 in the sealing edge part 2. The outer suppressing portion 80 includes an outer groove portion 81 formed by recessing a part of the upper surface of the lower edge portion 13 that contacts the upper edge portion 23 in an upward direction Zu, and an outer groove fitting that fits into the outer groove portion 81. It is composed of a mating convex portion 82.

As shown in FIG. 8, the outer groove portion 81 is a groove provided in the box outer direction OUT of the lower edge portion 13, and has a concave cross-sectional shape when viewed from a surface along the box inner-outer direction X. ing.
The outer groove fitting convex portion 82 is a protrusion provided on the box outer side direction OUT of the upper edge 23, and is configured to fit into the outer groove portion 81 in the assembled state where the lower case 10 and the upper case 20 are assembled. It is configured.

The electrical connection box 1y configured in this manner has an outer groove portion 81 located outside the cylindrical hole portion 15 (in the box outer direction OUT) and whose groove bottom is lower than the upper surface of the lower edge portion 13 where the cylindrical hole portion 15 is provided. It is formed. As a result, since the cylindrical hole 15 is located at a higher position than the groove bottom of the outer groove 81, foreign powder particles that enter the gap between the sealing edge 2 from the outside direction OUT of the box fall into the outer groove 81. It will be accumulated. Therefore, it is possible to further suppress powder foreign matter from moving beyond the cylindrical hole portion 15 to the inside of the box (box inside direction IN).

In addition, since the upper edge 23 is provided with the outer groove fitting protrusion 82 that fits into the outer groove 81, powder foreign matter accumulated in the outer groove 81 can be removed from the groove bottom of the outer groove 81. The upward movement can be suppressed by the outer groove fitting convex portion 82. Therefore, it is possible to further suppress the powder foreign matter accumulated in the outer groove portion 81 from moving in the box inner direction IN.

In the electrical junction box 1y, the groove bottom of the outer groove portion 81 is horizontal when the electrical junction box 1 is mounted on a vehicle. However, the groove bottom of this outer groove portion 81 may be inclined. Further, in a state in which the outer groove fitting convex portion 82 is fitted into the outer groove portion 81, a space may be provided between the bottom surface of the outer groove fitting convex portion 82 and the groove bottom surface of the outer groove portion 81.

Furthermore, in the electrical connection box 1y, the outer groove portion 81 is constituted by a groove having a concave cross-sectional shape in a cross section viewed from a plane along the box inner-outer direction X. However, it is not always necessary to form a groove in the box outward direction OUT of the cylindrical hole portion 15, and an outer stepped portion 81y may be provided instead of the outer groove portion 81 (see FIG. 9).

As shown in FIG. 9, this outer step portion 81y is a step provided by cutting out the end of the lower edge portion 13 in the box outside direction OUT in the downward direction Zd. That is, in the outer step portion 81y, the bottom surface of the step is provided on the lower side than the upper end surface of the outer step portion 81y.

Note that an outer step fitting portion 82y configured to fit with the outer step portion 81y is provided at the end of the upper edge portion 23 in the box outer direction OUT. Further, the outer step portion 81y and the outer step fitting portion 82y constitute an outer suppressing portion 80y.
In this way, by forming the outer stepped portion 81y, in which the outer side of the box is lower, on the outer side of the box than the cylindrical hole portion 15, it is possible to more reliably suppress powder-like foreign matter from moving in the box inner direction IN.

Next, an electrical connection box 1z according to the fifth embodiment shown in FIG. 10 will be described.
The electrical connection box 1z has the same configuration as the above-described electrical connection box 1 and has the same effects, but has a characteristic configuration that provides further effects. In the following, components of the electrical junction box 1z that are similar to those of the electrical junction box 1 will be given the same reference numerals and explanations thereof will be omitted, and characteristic components will be explained in detail. Similarly, in the description of other embodiments to be described later, characteristic configurations of each embodiment will be explained.

As shown in FIG. 4, in the assembled state in which the lower case 10 and the upper case 20 are assembled, the electrical connection box 1 has a cylindrical hole portion 15 and an inner intrusion prevention portion extending from the box outer direction OUT to the box inner direction IN. 60 and the fitting groove 50 are arranged in this order on the sealing edge 2.

On the other hand, in the electrical junction box 1z, similarly to the electrical junction box 1, the cylindrical hole part 15, the inner intrusion suppressing part 60, and the fitting groove 50 are arranged in this direction from the box outer direction OUT to the box inner direction IN. An inner step suppressing part 90 is disposed in order on the sealing edge 2 and is provided between the inner intrusion suppressing part 60 and the fitting groove 50.

As shown in FIG. 8, the inner step suppressing portion 90 is provided in the box outer direction OUT of the fitting groove 50 in the sealing edge 2. The inner step suppressing portion 90 includes an inner step portion 91 provided on the lower edge 13 and an inner step abutment portion 92 formed by cutting out the upper edge 23.

As shown in FIG. 10, the inner step portion 91 is provided so as to protrude in the upward direction Zu from the box outer direction OUT of the fitting groove 50 in the lower edge portion 13. That is, the inner step portion 91 is provided in the upper direction Zu than the upper surface of the lower edge portion 13.

The inner step contact portion 92 is formed by cutting out the upper edge portion 23 in the box inner direction IN. The depth of the notch of the inner step contact portion 92 with respect to the bottom surface of the upper edge portion 23 is configured to be equal to the height of the inner step portion 91. Further, the outer end surface 92a of the inner step contact portion 92 in the box outer direction OUT is disposed further in the box outer direction OUT than the protruding outer surface 91a of the inner step portion 91 in the box outer direction OUT, and the outer end surface 92a and the protruding outer surface 91a, an inner space S2 is configured.

The electrical connection box 1z configured in this manner is provided with an internal stepped portion 91 that is higher in the box inner direction IN than the cylindrical hole portion 15, so that powdery foreign matter does not flow from the cylindrical hole portion 15 into the fitting groove 50. can be prevented from moving. Thereby, it is possible to further suppress the powdery foreign matter from moving in the box inner direction IN.

In addition, the inner step suppression portion 90 is configured with an inner space S2 formed inside the sealing edge portion 2 and along the inner step portion 91, so that powdery foreign matter is not accumulated in the inner space S2. Therefore, it is possible to more reliably suppress the powdery foreign matter from moving in the box inner direction IN.

In the electrical junction box 1z, the inner step portion 91 and the inner step contact portion 92 constitute the inner space S2, but the inner space S2 does not necessarily need to be constituted. For example, the protruding outer surface 91a and the outer end surface 92a may be configured such that they are in contact with each other.

Further, in the electrical connection box 1z, the inner step contact portion 92 is configured by cutting out the upper edge 23 up to the end in the box inner direction IN, but the outer groove portion 81 can fit into the upper edge 23. It may be a recess like this.

In the correspondence between the configuration of this invention and the above-described embodiments, the opening corresponds to the opening O,
Similarly below,
The opening edge corresponds to the lower edge 13,
The case body corresponds to lower case 10,
The cover edge corresponds to the upper edge 23,
The cover body corresponds to the upper case 20,
The fitting groove corresponds to the fitting groove 50,
The ring member corresponds to the ring member 30,
the sealing edge corresponds to the sealing edge 2;
The fastening material corresponds to the bolt 40,
The foreign matter intrusion suppressing portion corresponds to the cylindrical hole portion 15, the groove recess 52, the inner intrusion suppressing portion 60, the rough surface portion 70, the outer suppressing portion 80, and the inner step suppressing portion 90,
The electrical junction box corresponds to electrical junction box 1, electrical junction box 1w, electrical junction box 1x, electrical junction box 1y, electrical junction box 1z,
The inner groove portion corresponds to the inner groove portion 61,
The inner groove fitting protrusion corresponds to the inner groove fitting protrusion 62,
The fastening hole corresponds to the cylindrical hole portion 15,
The upper end recess corresponds to the inclined edge 15c,
The tapered portion corresponds to the inclined edge portion 15c,
The bottom space corresponds to the bottom space S1,
The in-groove recess corresponds to the in-groove recess 52,
The inclined bottom surface corresponds to the recess bottom surface 52a,
The rough surface portion corresponds to the rough surface portion 70,
The adhesive part corresponds to the adhesive part 70x,
The outer groove portion corresponds to the outer groove portion 81,
The outer groove fitting convex portion corresponds to the outer groove fitting convex portion 82,
The inner step portion corresponds to the outer groove portion 81,
The internal space corresponds to the internal space S2,
Although the outer step portion corresponds to the outer step portion 81y, the present invention is not limited to only the configuration of the above-described embodiment, and many embodiments can be obtained.

In this embodiment, the lower case 10 and the upper case 20 are made of aluminum, but are not limited to aluminum, and may also be made of other metals or resins.
Furthermore, the configurations of the electrical connection boxes 1, 1w, 1x, 1y, and 1z described above are not limited to these configurations, and the respective configurations may be combined as appropriate. For example, the rough surface portion 70 and the adhesive portion 70x may be provided between the cylindrical hole portion 15 and the inner intrusion suppressing portion 60 in the electrical connection box 1, or may be provided in the cylindrical hole portion 15 in the box outward direction OUT. Further, a rough surface portion 70 or an adhesive portion 70x may be provided on the inner groove bottom surface 61a.

Further, in the present embodiment, the plate thickness (namely, wall thickness) of the lower side surface portion 12 is a first length L1, which is constant. However, an electrical connection box in which the thickness of the lower side surface portion 12 is partially different is also conceivable. The thickness of the lower side surface 12 in a case where the thickness of the lower side surface 12 is partially different as described above may be calculated as an average value of the thickness of the lower side surface 12, or It may be calculated as the plate thickness of the lower side surface portion 12 excluding the portions where the plate thickness differs.

1,1x~1z Electrical junction box 2 Sealing edge 10 Lower case 13 Lower edge 15 Cylindrical hole 15c Inclined edge 15c Inclined edge 20 Upper case 23 Upper edge 30 Ring member 40 Bolt 50 Fitting groove 52 Inside the groove Concave portion 52a Concave bottom surface 60 Inner intrusion suppressing portion 61 Inner groove portion 62 Inner groove fitting protrusion 70 Rough surface portion 70x Adhesive portion 80 Outer suppressing portion 81 Outer groove portion 82 Outer groove fitting convex portion 90 Inner step suppressing portion 91 Inner step portion 81y Outside Step S1 Bottom space S2 Inner space O Opening

Claims (19)

a case body having an opening and an opening edge;
a cover body that closes the opening of the case body and has a cover edge that meets the opening edge;
a rubber ring member fitted into a fitting groove formed in the opening edge;
The opening edge and the cover edge combine to form a sealing edge, and
A fastening material is provided that penetrates the cover edge and fastens the fastening portion of the sealing edge,
A foreign matter intrusion suppressing portion that suppresses intrusion of powdery foreign matter into a contact portion between the opening edge and the cover edge and the ring member is provided between the fastening portion and the fitting groove. ,
The distance between the fastening point and the fitting groove at the opening edge in the box-inside and outside directions,
Wider than the distance between the fastening point at the opening edge and the outer surface of the opening edge in the box-outside direction.
electrical connection box. The distance between the fastening point and the fitting groove at the opening edge in the box-inside and outside directions,
The electrical connection box according to claim 1, wherein the electrical connection box is wider than the wall thickness of the case body. The foreign matter intrusion suppressing section is
The electrical connection box according to claim 1 or 2 , comprising an inner groove portion provided between the fastening point and the fitting groove and having a groove bottom lower than the fastening point. The electrical connection box according to claim 3 , wherein the inner groove penetrates to the outside of the sealing edge. 5. The electrical connection box according to claim 3 , wherein the cover edge is provided with an inner groove fitting protrusion that fits into the inner groove. The electrical connection box according to any one of claims 1 to 5 , wherein an outer groove portion having a groove bottom lower than that of the fastening point is formed on the outside of the box from the fastening point. The electrical connection box according to claim 6 , wherein the cover edge portion is provided with an outer groove fitting convex portion that fits into the outer groove portion. The foreign matter intrusion suppressing section is
A roughened surface portion is provided on at least one of opposing surfaces of the opening edge and the cover edge that constitute the sealing edge and has a rougher surface roughness than the surface of the other portion. An electrical connection box according to any one of claims 1 to 7 . The foreign matter intrusion suppressing section is
Among claims 1 to 8 , the sealing edge comprises an adhesive part having adhesive properties provided on at least one of opposing surfaces of the opening edge and the cover edge that constitute the sealing edge. Electrical connection box listed in any of the above. The foreign matter intrusion suppressing section is
The electrical connection box according to any one of claims 1 to 9, wherein the fastening material formed at the fastening location in the opening edge is provided in a fastening hole to which the fastening material is fastened. The foreign matter intrusion suppressing section is
The electrical connection box according to claim 10 , comprising an upper end recess formed at a peripheral edge of an upper end opening of the fastening hole. The foreign matter intrusion suppressing section is
The electrical connection box according to claim 10 , further comprising a tapered portion formed at the peripheral edge of the upper end opening of the fastening hole and gradually inclined upward in a diametrically expanding direction. The foreign matter intrusion suppressing section is
Any one of claims 10 to 12, comprising a bottom space formed between the bottom of the fastening hole and the tip of the fastened material into which the powdery foreign matter can enter. Electrical junction box described in . The foreign matter intrusion suppressing section is
The electrical connection box according to any one of claims 1 to 13 , wherein the electrical connection box is configured with an inner stepped portion where the fitting groove side is higher than the fastening location. The foreign matter intrusion suppressing section is
The electrical connection box according to claim 14 , comprising an internal space formed inside the sealing edge and along the inner step. The electrical connection box according to any one of claims 1 to 15 , wherein an outer stepped portion is formed on the outer side of the box than the fastening location, the outer side of the box being lowered. The foreign matter intrusion suppressing section is
The electrical connection box according to any one of claims 1 to 16 , comprising an in-groove recess provided on the outside of the ring member in the bottom surface of the fitting groove. The foreign matter intrusion suppressing section is
The electrical connection box according to any one of claims 1 to 17 , wherein the bottom surface of the fitting groove is an inclined bottom surface that is lower on the outside of the box. The electrical connection box according to any one of claims 1 to 18 , wherein the case body and the cover body are made of a metal material.

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