Electrical junction box

Abstract

The electric connection box is provided with a fastening part (23A) used for being installed on the battery pack (200) and installed on the battery pack (200) from the outer side face (313), the fastening part (23A) is located in the center of the outer side face (313), and a bending prevention mechanism (60) used for preventing bending of the outer side face (313) is arranged near the fastening part (23A).

Description

Technical Field

[0001] The present disclosure relates to an electrical connection box.

[0002] This application claims the priority based on Japanese application No. 2022-089775 for which it applied on June 1, 2022, and all the contents described in the said Japanese application are cited. Background Art

[0003] Conventionally, an electric connection box that houses electronic components such as fuses and relays is mounted on a vehicle.

[0004] The electrical junction box includes a housing, for example, which is composed of a first housing having one surface side opened to accommodate the electronic component, and a second housing covering the open one surface side of the first housing (see Patent Document 1).

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Publication No. 2016-208561 Summary of the invention

[0008] The electrical junction box according to an embodiment of the present disclosure has a mounting portion for mounting on an object and is mounted on the object from one side, wherein the mounting portion is located at the center of the one side and a deflection prevention mechanism is provided near the mounting portion to prevent deflection of the one side. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a perspective view of the electrical junction box according to the embodiment.

[0010] Figure 2A It is a top view of the electrical junction box according to the embodiment.

[0011] Figure 2B It is a side view of the electrical junction box according to the embodiment.

[0012] Figure 3 It is an exploded view of the electrical junction box according to the embodiment.

[0013] Figure 4 It is a bottom perspective view of the electrical junction box according to the embodiment.

[0014] Figure 5 yes Figure 4 A partial cross-sectional stereogram of line AA.

[0015] Figure 6 yes Figure 4 Longitudinal section view of line AA.

[0016] Figure 7 yes Figure 4 A partial cross-sectional stereogram of line BB. DETAILED DESCRIPTION

[0017] [Problems to be Solved by the Present Disclosure]

[0018] The electrical connection box is installed on the installation object from the bottom side of the first housing. Specifically, a bolt is inserted from the installation object into a through hole provided at the bottom of the first housing and screwed in. At this time, in order to prevent the screwing from loosening due to thermal expansion of the electrical connection box, a collar is provided in the through hole, and the screwing is performed in a state where the collar is in contact with the installation object.

[0019] However, when the bottom of the first shell bends downward due to its own weight, the bottom contacts the installation object before the collar, thereby hindering the contact between the collar and the installation object during the screwing operation.

[0020] However, the electrical connection box of Patent Document 1 does not take such a problem into consideration and cannot solve the above-mentioned problem.

[0021] Therefore, an object of the present invention is to provide an electrical junction box capable of preventing a surface that comes into contact with an object to be mounted from being bent during mounting.

[0022] [Effects of the present disclosure]

[0023] According to the present disclosure, it is possible to provide an electrical junction box capable of preventing a surface that comes into contact with an object to be mounted from being bent during mounting.

[0024] [Description of Embodiments of the Invention]

[0025] First, the embodiments of the present disclosure will be described by way of examples. In addition, at least a part of the embodiments described below may be arbitrarily combined.

[0026] (1) An electrical junction box according to an embodiment of the present disclosure includes a mounting portion for mounting on an object and is mounted on the object from one side, wherein the mounting portion is located at a center portion of the one side and a deflection prevention mechanism is provided near the mounting portion to prevent deflection of the one side.

[0027] In this embodiment, a bending prevention mechanism is provided near the mounting portion at the center of the one surface to prevent bending, thereby preventing the one surface from bending and preventing the electrical junction box from being properly mounted on an object due to the bending of the one surface.

[0028] (2) The electrical connection box of the embodiment of the present disclosure comprises: a first shell having the one surface and an open portion formed on the opposite side opposite to the one surface; and a second shell covering the open portion of the first shell, wherein the deflection prevention mechanism comprises: a snap-fitting portion provided on the first shell; and a snap-fitting portion provided on the second shell and snap-fitting with the snap-fitting portion.

[0029] In this embodiment, the deflection prevention mechanism has a snap-fitting portion provided on the first shell and a snap-fitting portion provided on the second shell and snap-fitted with the snap-fitting portion. Therefore, by assembling the first shell and the second shell, the snap-fitting portion and the snap-fitting portion snap-fit, and the deflection prevention mechanism prevents deflection of the one side.

[0030] (3) The electrical junction box according to the embodiment of the present disclosure includes a confirmation window formed on the one surface for confirming the engagement between the engaging portion and the engaged portion.

[0031] In this embodiment, the confirmation window is provided for confirming the engagement between the engaging portion and the engaged portion. Therefore, when assembling the first housing and the second housing, the operator can confirm through the confirmation window whether the engaging portion and the engaged portion are properly engaged.

[0032] (4) In the electrical junction box according to the embodiment of the present disclosure, the mounting portion is provided in the second housing and is fitted into the through-tube formed on the one surface, the engaging portion is provided in the through-tube, and the engaged portion is formed integrally with the mounting portion.

[0033] In this embodiment, the engaging portion is provided on the through-tube, and the engaged portion is formed integrally with the mounting portion. Therefore, when the first shell and the second shell are assembled, the engaging portion and the engaged portion are engaged only by inserting the mounting portion of the second shell into the through-tube of the first shell.

[0034] [Details of the embodiments of the present invention]

[0035] Hereinafter, an electric junction box according to an embodiment of the present disclosure will be described with reference to the drawings. It should be noted that the present invention is not limited to these examples, but is indicated by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

[0036] Figure 1 is a perspective view of an electrical junction box 100 according to an embodiment. Figure 2A to Figure 2B 1 is a top view and a side view of the electrical junction box 100 according to the embodiment. Figure 3 1 is an exploded view of the electrical junction box 100 according to the embodiment. Figure 4It is a bottom perspective view of the electrical junction box 100 according to the embodiment. Figure 2A is a top view of the electrical connection box 100, Figure 2B 1 is a side view of the electrical junction box 100 .

[0037] The electrical connection box 100 is mounted on the outside of a mounting target (object) such as a battery pack 200 (see FIG. 2 ) of an EV (Electric Vehicle), for example.

[0038] The electrical connection box 100 includes, for example, a housing 50 that accommodates a fuse, a substrate, and the like. The housing 50 is a flat box that is substantially rectangular in plan view, and is formed in a shape in which one corner of one end in the longitudinal direction is cut into a step shape. The housing 50 is made of, for example, resin, and is composed of a lower housing 30 (first housing) mounted on the mounting object and an upper housing 20 (second housing) covering the lower housing 30. In the following, for the sake of convenience, the upper housing 20 side is described as the upper side and the lower housing 30 side is described as the lower side.

[0039] The lower case 30 is in the shape of a box with one side of the upper case 20 open to form an open portion 36. The lower case 30 has a bottom wall 31 that contacts the mounting object on the outside and a side wall 33 that extends vertically from the edge of the bottom wall 31 toward the upper case 20. Ribs are formed at multiple locations on the inner side of the lower case 30 (see Figure 3 ).

[0040] The bottom wall 31 of the lower case 30 has recesses 32b formed at both ends in the longitudinal direction and a recess 32a formed in the middle. The recesses 32a and 32b are formed at positions corresponding to the fastening portion 23 (mounting portion) of the upper case 20 described later.

[0041] Specifically, recesses 32b are formed at the two corners of the two ends of the lower housing 30. Each recess 32b is substantially rectangular in a plan view, and in each recess 32b, the side wall 33 is bent at a substantially right angle, and the recessed corners are chamfered (see Figure 3 ).

[0042] In addition, a recess 32a is formed in the middle of the long side of the lower shell 30. The recess 32a is substantially rectangular in a plan view. In the recess 32a, the side wall 33 is recessed toward the inner side of the lower shell 30, and the recessed corners are chamfered (see FIG. Figure 3 ).

[0043] Furthermore, a through-tube 34 is formed at the approximate center of the bottom wall 31, into which the later-described fastening portion 23A of the upper housing 20 is inserted. The through-tube 34 is cylindrical in shape and penetrates the bottom wall 31 in the thickness direction. That is, the axis of the through-tube 34 extends in the thickness direction of the bottom wall 31, and one side of the through-tube 34 protrudes vertically from the inner side surface 312 of the bottom wall 31, and the other side protrudes vertically from the outer side surface 313 (one side) of the bottom wall 31. The fastening portion 23A of the upper housing 20 is embedded in the through-tube 34, and protrudes from the lower side end of the through-tube 34. In addition, ribs 311 are erected on the outer side surface 313 of the bottom wall 31, for example, in a lattice shape.

[0044] The upper case 20 is formed in a box shape with one surface open on the lower case 30 side. The upper case 20 is slightly larger in the longitudinal direction and in the width direction perpendicular to the longitudinal direction than the lower case 30 and covers the open portion 36 of the lower case 30.

[0045] In addition, the upper housing 20 has a top wall 21 opposite to the bottom wall 31 of the lower housing 30 and a side wall 22 extending in the up-down direction and surrounding the edge of the top wall 21. The upper housing 20 is provided with fastening parts 23, 23A at both ends and the middle part in the longitudinal direction for mounting the housing 50 (electrical junction box 100) to the installation object.

[0046] Specifically, the fastening parts 23 are provided at two corners of one end in the length direction, and at two corners and between the two corners of the other end. In addition, in the upper shell 20, three fastening parts 23, 23A are also provided in parallel along the width direction in the middle part in the length direction. Each fastening part 23, 23A is provided protrudingly on the inner side surface 214 of the top wall 21 opposite to the bottom wall 31 (see Figure 5 ), the other fastening parts 23 of the top wall 21 except for the one fastening part 23A in the substantially central part are provided near the side wall 22 (refer to Figure 2A ).

[0047] In addition, a plurality of inner ribs 25 are protrudingly provided on the inner side surface 214 of the top wall 21 (see Figure 5 and Figure 6 ). The plurality of inner ribs 25 are in a plate shape.

[0048] Each fastening portion 23, 23A is made of resin and has a bottomed cylindrical shape, and the top wall 21 side is open. In addition, a fixing through hole 231 (see FIG. 23 ) used when the housing 50 is mounted on the mounting object is formed at the bottom of each fastening portion 23, 23A. Figure 4~Figure 6 The housing 50 (electrical junction box 100 ) can be mounted on the mounting object by inserting the bolt 300 from the mounting object into the fixing through hole 231 of the fastening portion 23 , 23A and screwing the bolt 300 with a nut (not shown) provided in the fastening portion 23 , 23A.

[0049] It should be noted that, as described above, the fastening portion 23 of the upper case 20 is arranged inside the recessed portion 32 a and the recessed portion 32 b of the lower case 30 .

[0050] Various connection parts 212 for connecting to other devices are provided at multiple locations on the outer side surface 211 of the top wall 21 opposite to the inner side surface 214. In addition, a plurality of mounting seats 213 for relays 400 are provided at the approximate center of the outer side surface 211 of the top wall 21, and a plurality of relays 400 are mounted. Figure 3 In the figure, for convenience, the illustration of the relay 400 is omitted.

[0051] Furthermore, a plurality of outer ribs 24 are protrudingly provided on the outer side surface 211 of the top wall 21. The outer ribs 24 include first outer ribs 24a for preventing warping due to gravity and second outer ribs 24b for preventing warping due to a difference in thermal expansion (see Figure 3 ).

[0052] The first outer ribs 24a are formed in a triangular plate shape and are mainly provided at the edge of the top wall 21. That is, the first outer ribs 24a have a smaller vertical dimension as they move from the center of the top wall 21 to the edge. As described above, the first outer ribs 24a suppress the relay 400 (see Figure 1 2 ) and the top wall 21 is warped due to its weight.

[0053] The second outer rib 24b is formed in a plate shape and is provided at the end of the top wall 21 in the longitudinal direction. For convenience, in this embodiment, the second outer rib 24b is provided only at one end of the top wall 21 as an example for explanation, but it is not limited to this and can also be provided at both ends.

[0054] Figure 5 is along Figure 4 A partial cutaway stereogram of line AA, Figure 6 is along Figure 4 The longitudinal section view of line AA, Figure 7 is along Figure 4 A partial cutaway stereogram of line BB. Figure 6 In FIG. 1 , for convenience of explanation, the mounting object (battery pack 200 ) and the bolt 300 are indicated by virtual lines (dash and dot lines).

[0055] As described above, the lower end of the fastening portion 23A in the substantially central portion of the top wall 21 is inserted into the through-tube 34 in the substantially central portion of the bottom wall 31. The lower end of the fastening portion 23A slightly protrudes from the lower end of the through-tube 34, and the lower end surface of the fastening portion 23A is exposed to the outside.

[0056] A collar 40 is inserted into the fixing through hole 231 formed at the bottom of the fastening portion 23A. The collar 40 is made of metal and has a ring shape. The collar 40 is interposed between the bolt 300 and the fastening portion 23A (fixing through hole 231), and prevents the resin fastening portion 23A from being crushed by the screwing of the metal bolt 300. A concave rib is provided around the fixing through hole 231 on the lower end surface of the fastening portion 23A (see FIG. 2 ). Figure 5 ).

[0057] In the electrical connection box 100 of the present embodiment, a bending prevention mechanism 60 for preventing the bottom wall 31 (central portion) from bending is provided near the fastening portion 23A and the through-tube 34. The bending prevention mechanism 60 is arranged at the central portion of the bottom wall 31, and includes an engaging portion 61 provided on the lower housing 30 and an engaged portion 62 provided on the upper housing 20 and engaged with the engaging portion 61.

[0058] The engaging portion 61 is in the shape of a right triangle in a longitudinal cross-sectional view (see Figure 5 and Figure 6 ), which is provided at a place of the upper end edge of the through-tube 34. That is, the engaging portion 61 is formed integrally with the through-tube 34. The engaging portion 61 is extended upward from the upper end edge of the through-tube 34 and protrudes from the outer peripheral surface of the through-tube 34. In detail, in the engaging portion 61, the radial dimension of the through-tube 34 (hereinafter referred to as thickness) is set to be larger than the wall thickness of the through-tube 34 and becomes smaller toward the upper end.

[0059] The engaged portion 62 is protruded downward from the inner side surface 214 of the top wall 21, and after assembly, is disposed at a position closer to the outside than the engaging portion 61 in a manner corresponding to the engaging portion 61 in the radial direction of the through-tube 34. That is, the engaged portion 62 is disposed at a predetermined interval from the outer peripheral surface of the fastening portion 23A, and is formed integrally with the fastening portion 23A via the top wall 21. The interval between the engaged portion 62 and the fastening portion 23A is greater than the wall thickness of the through-tube 34, and less than the maximum thickness of the engaging portion 61.

[0060] The engaged portion 62 is in the shape of a rectangular plate and has a long strip-shaped cutout 621 extending from the upper side to the lower side. That is, the engaged portion 62 is in the shape of a U (see Figure 7 ). The engaging portion 61 is inserted into the cutout 621 , and the engaging portion 61 and the engaged portion 62 are engaged with each other.

[0061] A confirmation window 35 is formed in the bottom wall 31 near the through-tube 34 to confirm whether the engaging portion 61 and the engaged portion 62 are properly engaged. The confirmation window 35 is substantially rectangular and penetrates the bottom wall 31 in the thickness direction. The edge of the confirmation window 35 protrudes downward from the outer side surface 313 of the bottom wall 31.

[0062] As described above, the electrical connection box 100 is mounted on the outside of the mounting object such as the battery pack 200 from the bottom wall 31 side. Specifically, the bolts 300 are inserted into the fixing through holes 231 of the fastening parts 23 and 23A from the battery pack 200 and screwed in. At this time, it is necessary to prevent the screwing from loosening by making the collar 40 of the fastening part 23A and the battery pack 200, which are made of metal and have a small amount of thermal expansion, contact each other.

[0063] However, when the center portion of the bottom wall 31 is bent downward due to its own weight, for example (see Figure 6 ), compared with the ring 40, the bottom wall 31 or the through tube 34 and the rib 311 abut against the battery pack 200 first, so in the screwing operation between the battery pack 200 and the fastening portion 23A, a problem of hindering the abutment between the ring 40 and the battery pack 200 occurs.

[0064] In this regard, in the electrical connection box 100 of the present embodiment, a bending prevention mechanism 60 is provided near the fastening portion 23A and the through-tube 34, so that, for example, the central portion of the bottom wall 31 can be prevented from bending downward due to its own weight. Therefore, the above-mentioned problem that the collar 40 of the fastening portion 23A cannot contact the mounting object (battery pack 200) due to the bending of the bottom wall 31 can be prevented in advance.

[0065] In addition, in the electrical junction box 100 of the present embodiment, as described above, the engaging portion 61 is formed integrally with the through-tube 34, and the engaged portion 62 is formed integrally with the fastening portion 23A. Therefore, when assembling the upper case 20 and the lower case 30, the engaging portion 61 and the engaged portion 62 can be engaged simply by inserting the fastening portion 23A into the through-tube 34. Therefore, the workability of assembly can be improved.

[0066] Furthermore, in the electrical junction box 100 of the present embodiment, as described above, the confirmation window 35 is formed near the through-tube 34 , so that when the upper case 20 and the lower case 30 are assembled, it is possible to confirm through the confirmation window 35 whether the engaging portion 61 and the engaged portion 62 are properly engaged.

[0067] In the above description, the case where there is one anti-bending mechanism 60 is described as an example, but the present invention is not limited thereto. The anti-bending mechanism 60 may be disposed at a plurality of locations in the central portion of the bottom wall 31 .

[0068] In addition, in the above description, the case where the engaging portion 61 is formed integrally with the through-tube 34 and the engaged portion 62 is formed integrally with the fastening portion 23A is described as an example, but the present invention is not limited thereto. The engaging portion 61 may be formed integrally with the fastening portion 23A (upper housing 20) and the engaged portion 62 may be formed integrally with the through-tube 34 (lower housing 30).

[0069] The embodiments disclosed this time should be considered as illustrative in all aspects and not restrictive. The scope of the present invention is indicated by the scope of claims rather than the above meaning, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

[0070] The matters described in each embodiment can be combined with each other. In addition, the independent claims and dependent claims described in the scope of protection can be combined with each other in all combinations regardless of the reference form. Furthermore, in the scope of protection, a form of recording a claim that refers to two or more other claims (multiple dependent claims form) is adopted, but it is not limited to this. It can also be recorded in the form of recording multiple dependent claims (multiple references to multiple claims) that refer to at least one multiple dependent claim.

[0071] Description of Reference Numerals

[0072] 20 Upper shell (second shell)

[0073] 21 Top wall

[0074] 22, 33 side wall

[0075] 23, 23A Fastening part (installation part)

[0076] 24 lateral rib

[0077] 24a First lateral rib

[0078] 24b Second lateral rib

[0079] 25 medial rib

[0080] 30 Lower shell (first shell)

[0081] 31 bottom wall

[0082] 32a recess

[0083] 32b recess

[0084] 34 Through tube

[0085] 35 Confirmation window

[0086] 36 Open Department

[0087] 40 Ring

[0088] 50 Shell

[0089] 60 Deflection prevention mechanism

[0090] 61 snap-fit ​​part

[0091] 62 Engaged part

[0092] 100 Electrical connection box

[0093] 200 Battery Pack

[0094] 211 outer side

[0095] 212 Connection

[0096] 213 Mounting Block

[0097] 214 inner side

[0098] 231 Fixed through hole

[0099] 300 Bolts

[0100] 311 Rib

[0101] 312 inner side

[0102] 313 outer side (one side)

[0103] 400 Relay

[0104] 621 Incision

Claims

1. An electrical connection box having a mounting portion for mounting on an object and mounted on the object from one side, wherein: The mounting portion is located at the center of the one surface, A deflection prevention mechanism is provided near the mounting portion, and the deflection prevention mechanism prevents deflection of the one surface.

2. The electrical connection box according to claim 1, wherein: The electrical connection box has: A first housing having the one surface and an opening formed on a side opposite to the one surface; and a second shell covering the open portion of the first shell, The deflection prevention mechanism comprises: A clamping portion, disposed on the first shell; and The engaged portion is disposed on the second shell and is engaged with the engaging portion.

3. The electrical connection box according to claim 2, wherein: The electrical junction box includes a confirmation window formed on the one surface and used to confirm the engagement between the engaging portion and the engaged portion.

4. The electrical connection box according to claim 2 or 3, wherein: The mounting portion is disposed on the second housing and embedded in the through-tube formed on the one surface. The engaging portion is arranged on the through tube, The engaged portion is formed integrally with the mounting portion.

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