Electric connection box

Abstract

To provide an electric connection box which can appropriately and smoothly mount a holder.SOLUTION: An electric connection box 1 includes: a housing 2 including a body part 21 which has a cylindrical side wall part 211, has a flange part 213 formed on the outer surface of the side wall part 211 and is formed by resin molding, and a lid part 22 mounted on the end of the side wall part 211 of the body part 21; and a cut-off member 3 which is arranged inside the body part 21 and performs cut-off between the body part 21 and the lid part 22, wherein the flange part 213 is configured to form a recess 213A away from a position connected to the side wall part 211 from the arrangement position of the cut-off member 3, on a base end 213C connected to the side wall part 211.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to an electrical junction box. [Background technology]

[0002] Conventionally, as described in Patent Document 1, for example, an electrical connection box is known which includes an electrical equipment mounting block that houses electronic components, a lower cover that is attached to an opening of the electrical equipment mounting block, and a gasket that provides a waterproof seal between the electrical equipment mounting block and the lower cover. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2001-251724 A Summary of the Invention [Problem to be solved by the invention]

[0004] This electrical connection box has room for improvement in that the watertightness of the packing may not be ensured. For example, if the main body, which is the transmission component mounting block, is a molded product, molding defects on the inner surface of the main body with which the packing comes into contact will prevent the packing from fully functioning as a watertightness. In particular, if there are protruding parts on the outside of the main body, there will be parts where the main body is thick, which is likely to cause molding defects.

[0005] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide an electrical junction box capable of ensuring the water-stopping function of a water-stopping member. [Means for solving the problem]

[0006] In other words, the electrical connection box of the present invention comprises a housing having a main body having a cylindrical side wall portion and a protrusion formed on the outer surface of the side wall portion and formed by resin molding, a lid portion attached to an end of the side wall portion of the main body portion, and a water-stopping member arranged inside the main body portion and performing a water-stopping between the main body portion and the lid portion, and the protrusion is configured to form a recess at its base end connected to the side wall portion that distances the position where the water-stopping member is arranged from the position where it connects to the side wall portion. Effect of the Invention

[0007] According to the electrical junction box of the present invention, the waterproofing function of the waterproofing member can be ensured. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing an electrical junction box according to an embodiment. [Diagram 2] FIG. 2 is an exploded perspective view showing the electrical junction box according to the embodiment. [Diagram 3] FIG. 3 is a cross-sectional view of the electrical junction box taken along line III-III in FIG. [Figure 4] FIG. 4 is an enlarged cross-sectional view of the electrical junction box taken along line III-III in FIG. [Diagram 5] FIG. 5 is a cross-sectional view of the electrical junction box taken along line VV of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to this embodiment. In addition, the components in the following embodiments include those that are replaceable and easy for a person skilled in the art, or those that are substantially the same.

[0010] [Embodiment] This embodiment relates to an electric junction box. In the following description, among the first, second, and third directions that intersect with each other, the first direction is referred to as the "insertion direction X", the second direction is referred to as the "width direction Y", and the third direction is referred to as the "mounting direction Z". Here, the insertion direction X, the width direction Y, and the mounting direction Z are mutually perpendicular. The insertion direction X corresponds to the insertion direction of the electric wire into the housing. The mounting direction Z corresponds to the direction in which the lid part is mounted to the main body part of the housing. The width direction Y and the mounting direction Z correspond to the intersecting direction that intersects with the insertion direction X. In addition, each direction used in the following description represents a direction in a state in which each part is assembled with each other, unless otherwise specified. Note that the orthogonal here includes substantially orthogonal.

[0011] 1 and 2, the electrical junction box 1 is a box for accommodating electrical components, and is mounted on, for example, a vehicle and used as a fuse box. The electrical junction box 1 includes a housing 2 and a waterproofing member 3. The housing 2 is a container for accommodating electrical components, and accommodates, for example, a fuse 4 as an electrical component. The fuse 4 is accommodated, for example, in a diagonal direction in the housing 2, which is formed in a substantially rectangular parallelepiped shape, and is fastened and fixed within the housing 2 by bolts.

[0012] The housing 2 has a main body 21 and a lid 22. The main body 21 is box-shaped and has a cylindrical side wall 211, with a closed bottom and an open top. For example, the main body 21 has an end in the mounting direction Z that is open to form an opening 2A, and the opening shape is rectangular or nearly rectangular. The side wall 211 is a portion that constitutes the side surface of the main body 21. The main body 21 is made of resin and is formed by resin molding. The lid 22 is detachable from the opening 2A of the main body 21 and is attached to the opening 2A to close the opening 2A. The lid 22 is fixed to the main body 21 by a fastening member 23.

[0013] The main body 21 forms a flange portion 213 that protrudes from an outer surface 211A of the side wall portion 211. The flange portion 213 is a protruding portion that protrudes from the side wall portion 211, and functions as a mounting portion for mounting the housing 2 to a vehicle, which is an object of mounting. The flange portion 213 forms a hole 213B that penetrates in the mounting direction Z. For example, the electrical junction box 1 is mounted to the body or a component of the vehicle by inserting a mounting member such as a stud bolt into the hole 213B.

[0014] The main body 21 forms a nut portion 212 that protrudes from an outer surface 211A of the side wall portion 211. The nut portion 212 is a protruding portion that protrudes from the side wall portion 211, and functions as a second attachment portion for inserting the fastening member 23 therethrough to attach the lid portion 22. The nut portion 212 forms a hole 212B that is drilled in the attachment direction Z. The hole 212B is a hole for inserting the fastening member 23.

[0015] The main body 21 contains a water-stopping member 3. The water-stopping member 3 is disposed inside the main body 21 and is a sealing material that stops water between the main body 21 and the lid 22. For example, the water-stopping member 3 is made of an annular elastic member, disposed near the opening 2A of the main body 21, and provided in contact with the inner surface of the side wall 211. For example, the water-stopping member 3 is attached to the main body 21 together with the lid 22 in a state where it is hooked to the lid 22. That is, the water-stopping member 3 forms a hooking portion 31 extending toward the lid 22, and can be attached to the lid 22 by hooking the hooking portion 31 to the lid 22. A plurality of hooking portions 31 are formed at predetermined distances along the outer circumferential direction of the main body 21.

[0016] The housing 2 is formed with an electric wire insertion portion 25. The electric wire insertion portion 25 is an electric wire lead-out portion for drawing out the electric wire 51 of the electric wire with terminal 5 accommodated in the housing 2 to the outside of the housing 2. The electric wire insertion portion 25 functions as an insertion path for the electric wire with terminal 5 when the electric wire with terminal 5 is assembled. The electric wire insertion portion 25 is provided according to the number of electric wires with terminal 5 to be installed, for example, two electric wires with terminal 5 are provided. The electric wire insertion portion 25 is provided protruding from the side wall portion 211 of the main body portion 21 and formed along the extending direction of the electric wire 51. The two electric wire insertion portions 25 are provided protruding in opposite directions from the opposing side wall portions 211. The electric wire insertion portion 25 is cylindrical and formed penetrating the side wall portion 211, and communicates the internal space of the housing 2 with the outside.

[0017] The electric wire with terminal 5 is configured by attaching a terminal 52 to an end of an electric wire 51. For example, a crimp terminal that is crimped and attached to the electric wire 51 is used as the terminal 52. The terminal 52 may also be attached to the electric wire 51 and function as a bus bar. For example, the terminal 52 is connected to the fuse 4 inside the housing 2. For example, a coated electric wire in which a conductor core wire is coated with an insulating member is used as the electric wire 51. The electric wire with terminal 5 functions as, for example, a part of a wire harness. Note that in Figs. 1 and 2, the extending portion of the electric wire 51 of the electric wire with terminal 5 is omitted.

[0018] A packing 6 is attached to the outer periphery of the electric wire 51. The packing 6 is a water-stopping member that stops water from entering between the electric wire insertion portion 25 and the electric wire 51, and is made of, for example, a ring-shaped elastic member. The packing 6 is used by being disposed inside the electric wire insertion portion 25, and is installed by being inserted into the electric wire insertion portion 25 in a state where it is attached to the outer periphery of the electric wire 51, for example.

[0019] A holder 7 is attached to the electric wire insertion portion 25. The holder 7 is a member that holds the packing 6 that is placed in the electric wire insertion portion 25, and is attached to the tip end of the electric wire insertion portion 25 so as to cover the outer periphery.

[0020] As shown in FIG. 3, a recess 213A is formed in the base end 213C of the flange portion 213 connected to the side wall portion 211. The recess 213A is a portion for equalizing the thickness of the side wall portion 211. The recess 213A is formed so as to distance the position where the flange portion 213 is connected from the arrangement position of the water-stopping member 3 arranged inside the side wall portion 211. For example, when the flange portion 213 is provided below the water-stopping member 3, the recess 213A is formed by being recessed downward. By forming the recess 213A in this manner, the thickness of the side wall portion 211 can be made uniform in the region where the water-stopping member 3 contacts the side wall portion 211. That is, as shown in FIG. 4, it is possible to prevent the flange portion 213 from being connected outside the side wall portion 211 in the range where the water-stopping member 3 contacts inside the side wall portion 211.

[0021] As shown in FIG. 5, a recess 212A is formed in the base end 212C of the nut portion 212 connected to the side wall portion 211. The recess 212A is a portion for equalizing the thickness of the side wall portion 211. The recess 212A is formed so as to distance the position where the nut portion 212 is connected from the arrangement position of the water-stopping member 3 arranged inside the side wall portion 211. For example, when the nut portion 212 is provided below the water-stopping member 3, the recess 212A is formed by being recessed downward. By forming the recess 212A in this manner, the thickness of the side wall portion 211 can be made uniform in the region where the water-stopping member 3 contacts the side wall portion 211. In other words, it is possible to prevent the nut portion 212 from being connected outside the side wall portion 211 in the range where the water-stopping member 3 contacts inside the side wall portion 211.

[0022] Next, a waterproof function of the electrical junction box 1 according to this embodiment will be described.

[0023] As shown in FIGS. 1 and 2, the electrical junction box 1 has a housing 2 with a lid 22 attached to an opening 2A of a main body 21, and a waterproof member 3 prevents water from entering between the main body 21 and the lid 22.

[0024] Incidentally, when the main body 21 is formed by resin molding, molding defects may occur in the main body 21 depending on the structure of the main body 21. For example, sink marks may occur in thick portions of the side wall 211 of the main body 21. Specifically, if there is a portion that protrudes outward from the side wall 211, sink marks will occur so that the inner surface of the side wall 211 is recessed, and unevenness will occur on the inner surface. If the uneven portion on the inner surface of the side wall 211 is in the contact area with the water-stopping member 3, the water-stopping function of the water-stopping member 3 will not be fully exhibited.

[0025] In contrast, in the electrical junction box 1 according to this embodiment, when there is a part that protrudes outward from the side wall 211 of the main body 21, the protruding part is configured so as not to be connected as far as possible to the outside of the arrangement position of the water-stopping member 3. That is, the protruding part forms a recess at the base end connected to the side wall 211 so as to distance the position where it connects to the side wall 211 from the arrangement position of the water-stopping member 3.

[0026] 4, when the flange portion 213 is provided to protrude from the outside of the side wall portion 211, a recess 213A is formed in the base end portion 213C of the flange portion 213. By forming the recess 213A, it is possible to prevent the flange portion 213 from being connected to the outside of the side wall portion 211, and to make the thickness of the side wall portion 211 uniform. Therefore, in the electrical junction box 1, the inner surface of the side wall portion 211 is flattened, and the waterproofing member 3 can ensure the waterproofing function.

[0027] 5, when the nut portion 212 protrudes from the outside of the side wall portion 211, a recess 212A is formed in the base end portion 212C of the nut portion 212. By forming the recess 212A, it is possible to prevent the nut portion 212 from being connected to the outside of the side wall portion 211, and to make the thickness of the side wall portion 211 uniform. Therefore, in the electrical junction box 1, the inner surface of the side wall portion 211 is flattened, and the waterproofing function can be ensured by the waterproofing member 3.

[0028] As described above, in the electrical junction box 1 according to this embodiment, by forming the recesses 213A, 212A in the flange portion 213 and the nut portion 212 protruding from the side wall portion 211, it is possible to equalize the thickness of the side wall portion 211 in the region that comes into contact with the water-stopping member 3. Therefore, in the electrical junction box 1 according to this embodiment, it is possible to prevent the occurrence of molding defects on the inner surface of the side wall portion 211, and it is possible to ensure the water-stopping function of the water-stopping member 3.

[0029] Furthermore, by applying the electrical junction box 1 according to the present embodiment to a fuse box mounted in a vehicle, it is possible to reliably ensure the waterproofing function of the fuse box that houses the fuse.

[0030] The electrical connection box according to the present invention is not limited to the above-described embodiment, and various modifications are possible within the scope of the claims. The electrical connection box 1 according to this embodiment may be configured by appropriately combining the components of the above-described embodiment and modified examples.

[0031] For example, in the above embodiment, the flange portion 213 and the nut portion 212 are described as protruding from the side wall portion 211, but the protruding portion from the side wall portion 211 may be something other than the flange portion 213 and the nut portion 212, and a recess may be formed in such a part. Even with such an electrical junction box, the thickness of the side wall portion 211 can be made uniform, as with the electrical junction box 1 according to the above embodiment, and the water-stopping function of the water-stopping member 3 can be ensured.

[0032] In addition, in the above-described embodiment, the electrical junction box 1 is described as being applied to a fuse box mounted on a vehicle, but the electrical junction box of the present invention may be applied to things other than fuse boxes, or may be applied to things that are not mounted on a vehicle. [Explanation of symbols]

[0033] 1: Electrical junction box 2: Housing 3:Water-stopping material 21: Main body 22: Lid 211: Side wall 212: Nut part (protruding part, second mounting part) 212A: Recess 212C: Proximal end 213: Flange part (protruding part, mounting part) 213A: Recess 213C: Proximal end

Claims

1. a housing including a main body having a cylindrical side wall portion and a protrusion formed on an outer surface of the side wall portion by resin molding, and a lid portion attached to an end portion of the side wall portion of the main body; a water-stopping member disposed inside the main body and performing water-stopping between the main body and the lid, The protrusion has a recess at a base end connected to the side wall portion, the recess distances a position where the water-stopping member is connected to the side wall portion from an arrangement position of the water-stopping member. Electrical junction box.

2. The protrusion is an attachment portion for attaching the housing to an attachment object.

2. The electrical junction box according to claim 1.

3. The protrusion is a second attachment portion used to attach the lid portion to the main body portion.

3. The electrical junction box according to claim 1 or 2.

4. The housing contains a fuse for suppressing an overcurrent; A fuse box installed in a vehicle.

3. The electrical junction box according to claim 1 or 2.

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