Electrical junction box

Abstract

An electrical connection box (100) is provided with a box body (50) and a relay (400) provided on a wall adjacent to a side wall (22) of the box body (50) so as to be spaced apart from the side wall (22), and a strength reinforcing section (26) is provided from the center of the side wall (22) to the vicinity of the relay (400).

Description

Technical Field

[0001] The present disclosure relates to an electrical connection box. This application claims the priority based on Japanese application No. 2022-089776 for which it applied on June 1, 2022, and all the contents described in the said Japanese application are cited. Background Art

[0002] Conventionally, an electric connection box including electronic components such as fuses and relays is mounted on a vehicle.

[0003] The electrical junction box includes a housing, for example, which is composed of a first case having one surface side opened and on which the electronic component is provided, and a second case covering the open one surface side of the first case (see Patent Document 1). Prior art literature Patent Literature

[0004] Patent document 1: Japanese Patent Application Publication No. 2016-208561. Summary of the invention

[0005] An electrical junction box according to an embodiment of the present disclosure includes a box body and an electronic component provided on a wall adjacent to a side wall of the box body so as to be separated from the side wall, and a strength reinforcement portion provided from a center portion of the side wall to a vicinity of the electronic component. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a perspective view of the electrical junction box according to the embodiment.

[0007] Figure 2A It is a top view of the electrical junction box according to the embodiment.

[0008] Figure 2B It is a side view of the electrical junction box according to the embodiment.

[0009] Figure 3 It is an exploded view of the electrical junction box according to the embodiment.

[0010] Figure 4 It is a bottom perspective view of the electrical junction box according to the embodiment.

[0011] Figure 5 This is an exploded view of the electrical junction box according to the embodiment in a state in which the electrical junction box is turned upside down.

[0012] Figure 6 yes Figure 4 A longitudinal cross-sectional view taken along line VI-VI. DETAILED DESCRIPTION Problems to be Solved by the Present Disclosure

[0013] The above-mentioned electrical junction box is mounted on an object such as a vehicle. Specifically, the electrical junction box is fixed to the object by screwing or the like.

[0014] However, since the vehicle vibrates during travel, the electric connection box mounted on the vehicle also vibrates along with the vibration of the vehicle. At this time, the vibration of the electric connection box becomes the cause of the loosening of the screw fastening between the electric connection box and the vehicle.

[0015] In addition, heavy electronic components such as relays installed in the electrical connection box vibrate along with the vibration of the electrical connection box and affect the vibration of the electrical connection box. That is, the vibration of heavy electronic components such as relays increases the vibration amount of the electrical connection box, which may further loosen the screw fastening between the electrical connection box and the vehicle.

[0016] However, the electrical connection box of Patent Document 1 does not take such a problem into consideration and cannot solve the above-mentioned problem.

[0017] Therefore, an object is to provide an electrical junction box capable of suppressing vibration of electronic components and preventing loosening of fixation to an object. Effects of the present disclosure

[0018] According to the present disclosure, it is possible to provide an electrical junction box capable of suppressing vibration of an electronic component and preventing loosening of fixation to an object. Description of Embodiments of the Invention

[0019] 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.

[0020] (1) An electrical junction box according to an embodiment of the present disclosure includes a box body and an electronic component provided on a wall adjacent to a side wall of the box body so as to be separated from the side wall, and a strength reinforcement portion provided from a center portion of the side wall to a vicinity of the electronic component.

[0021] In this embodiment, a strength reinforcement portion is provided from the center of the side wall to the vicinity of the electronic component. Therefore, the portion between the side wall and the electronic component is reinforced by the strength reinforcement portion, thereby suppressing vibration of the electronic component and preventing loosening of the fixation with the object.

[0022] (2) In the electrical connection box according to an embodiment of the present disclosure, the box body includes a first shell having the side wall and the one wall, the strength reinforcement portion is provided in the first shell and includes an inner wall provided inside the side wall and convexly curved toward the electronic component, and a rib provided between the inner wall and the side wall.

[0023] In this embodiment, the strength reinforcement portion has an inner wall that is convex and curved from the inner side of the side wall toward the electronic component side and a rib disposed between the inner wall and the side wall. Therefore, the portion between the side wall and the electronic component is reinforced, which can suppress the vibration of the electronic component and prevent the fixation with the object from loosening.

[0024] (3) In the electrical junction box according to an embodiment of the present disclosure, the box body includes a second housing that closes an open portion of the first housing formed to face the one wall, and a side wall of the second housing has a curved portion corresponding to the inner wall.

[0025] In this embodiment, the side wall of the second housing has a curved portion corresponding to the inner wall, and the curved portion is connected to the inner wall to be reinforced. Therefore, the portion between the side wall and the electronic component is further strengthened, thereby suppressing the vibration of the electronic component and preventing the fixation with the object from loosening.

[0026] (4) In the electrical junction box according to the embodiment of the present disclosure, the strength reinforcement portion has a mounting portion for mounting on an object.

[0027] In this embodiment, the mounting portion is provided on the strength reinforcement portion, and when the electrical junction box is mounted on an object, the mounting portion is fixed to the object. Thus, the strength reinforcement portion is fixed to the object, thereby suppressing vibration of the electronic component and preventing loosening of the fixation with the object. Details of the embodiments of the present invention

[0028] Hereinafter, an electric junction box according to an embodiment of the present disclosure will be described with reference to the drawings. The present disclosure is not limited to these examples, but is indicated by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0029] 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 an electrical junction box 100 according to an embodiment. Figure 3 is an exploded view of the electrical junction box 100 according to the embodiment. Figure 4 It 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 .

[0030] The electrical connection box 100 is mounted on the outside of an object such as a battery pack 200 (see FIG. 2 ) of an EV (Electric Vehicle). Figure 2B In FIG. 1 , for convenience of explanation, the state in which the electrical connection box 100 is installed in the battery pack 200 is shown.

[0031] The electrical connection box 100 includes, for example, a box body 50 that accommodates a fuse, a substrate, etc. The box body 50 is a flat box body that is substantially rectangular in plan view, and has a shape in which one corner of one end in the longitudinal direction is cut into a step-like shape. The box body 50 is made of, for example, resin, and is composed of a lower shell 30 (second shell) attached to the object and an upper shell 20 (first shell) covering the lower shell 30. In the following, for the sake of convenience, the upper shell 20 side is described as the upper side and the lower shell 30 side is described as the lower side.

[0032] The lower case 30 is in the shape of a box in which one side of the upper case 20 is open to form an opening portion 36. In addition, the upper case 20 is in the shape of a box in which one side of the lower case 30 is open to form an opening portion 27 (see Figure 5 ). The dimension of the upper shell 20 in the longitudinal direction and the dimension of the width direction orthogonal to the longitudinal direction are slightly larger than those of the lower shell 30, and the upper shell 20 covers the opening 36 of the lower shell 30. In other words, the opening 27 of the upper shell 20 is closed by the lower shell 30.

[0033] The lower housing 30 has a bottom wall 31 whose outer side is in contact with the object and a side wall 33 extending vertically from the edge of the bottom wall 31 toward the upper housing 20. Ribs are formed at multiple locations on the inner side of the lower housing 30 (see Figure 3 ).

[0034] 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 portions 23 of the upper case 20 described later.

[0035] 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 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 FIG. Figure 3 ).

[0036] In addition, a recess 32a is formed in the middle of the long side of the lower housing 30. The recess 32a is substantially rectangular in plan view. In the recess 32a, the side wall 33 is recessed toward the inner side of the lower housing 30, and the recessed corners are chamfered (see FIG. Figure 3 ).

[0037] The side wall 33 of the lower case 30 has a portion corresponding to the strength reinforcement portion 26 of the upper case 20, which will be described in detail later, which is recessed toward the inner side of the lower case 30. More specifically, the side wall 33 of the lower case 30 has a portion corresponding to the inner wall 261 of the strength reinforcement portion 26, and a curved portion 331 (see FIG. 1 ) that is curved in the shape of the inner wall 261 is formed. Figure 4). After the upper shell 20 and the lower shell 30 are assembled, the bent portion 331 abuts against the inner wall 261 from the inside.

[0038] Furthermore, a through-tube 34 is formed at the substantially central portion of the bottom wall 31, into which the fastening portion 23 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 of the bottom wall 31. The fastening portion 23 is embedded in the through-tube 34 and protrudes beyond the lower side end of the through-tube 34. In addition, ribs 311 are vertically provided on the outer side surface 313 of the bottom wall 31, for example, in a lattice shape.

[0039] The upper case 20 includes a top wall 21 (one wall) facing the bottom wall 31 of the lower case 30 , and side walls 22 provided around the edge of the top wall 21 and standing in the up-down direction.

[0040] 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. In addition, a plurality of assembly seats 213 for relays 400 are provided at the approximate center of the outer side surface 211 of the top wall 21. The relays 400 (electronic components) having a winding body of a coil are mounted on the assembly seats 213. That is, the relays 400 are provided to be separated from the side wall 22 of the upper housing 20. Figure 3 In the figure, for convenience, the relay 400 is omitted.

[0041] 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 a first outer rib 24a for preventing warping due to gravity and a second outer rib 24b for preventing warping due to a difference in thermal expansion (see Figure 3 ).

[0042] The first outer ribs 24a are triangular plate-shaped and are mainly provided at the edge of the top wall 21. That is, the first outer ribs 24a have smaller dimensions in the vertical direction as they move from the center of the top wall 21 to the edge. As described above, the first outer ribs 24a prevent the top wall 21 from being deformed by the relay 400 (see FIG. 1 ) installed at the center. Figure 1 and Figure 2) due to the weight.

[0043] The second outer rib 24b is plate-shaped and is disposed at the end of the top wall 21 in the longitudinal direction. For convenience, in this embodiment, the second outer rib 24b is only disposed at one end of the top wall 21 as an example for explanation, but it is not limited thereto and may also be disposed at both ends.

[0044] Furthermore, the upper case 20 is provided with fastening portions 23 and 23A at both ends and a middle portion in the longitudinal direction for attaching the box body 50 (electrical junction box 100 ) to the object.

[0045] In the upper case 20, as described above, the fastening parts 23 are provided at two corners in the width direction of one end portion in the length direction in which one corner is cut into a step shape, and the fastening parts 23 are provided at two corners in the width direction of the other end portion on the opposite side of the one end portion. In addition, the fastening part 23A (mounting part) is provided at the middle part in the width direction of the other end portion of the upper case 20. That is, the fastening part 23A is provided at the middle part in the extension direction (width direction) of the side wall 22A of the other end portion and near the side wall 22A.

[0046] Furthermore, in the upper shell 20, three fastening parts 23 are arranged in parallel along the width direction in the middle part in the length direction. Among the three fastening parts 23, the fastening part 23 arranged in the middle part in the width direction (hereinafter referred to as the central fastening part 23) is embedded in the through-tube 34 of the lower shell 30. The lower end of the central fastening part 23 protrudes slightly from the lower side end of the through-tube 34, and the lower end surface of the central fastening part 23 is exposed to the outside. In addition, as described above, the other fastening parts 23 are arranged inside the recessed parts 32a and the recessed parts 32b of the lower shell 30.

[0047] Each fastening portion 23 is protruded from the inner side surface 214 of the top wall 21 facing the bottom wall 31 (see Figure 5 and Figure 6 ). In addition, the other fastening parts 23 and 23A other than the central fastening part 23 are provided near the side wall 22 (refer to Figure 2A In addition, a plurality of inner ribs 25 are 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 (hereinafter, also referred to as the fastening portion 23) 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. 2 ) used when the box 50 is mounted on the object is formed at the bottom of each fastening portion 23. Figure 4 The box body 50 (electrical junction box 100 ) can be mounted on the object by inserting a screw (not shown) from the object into the fixing through hole 231 of the fastening portion 23 and screwing the screw with a nut (not shown) provided in the fastening portion 23 .

[0049] Furthermore, upper case 20 is provided with strength reinforcement portion 26. Strength reinforcement portion 26 partially reinforces the strength of upper case 20 and suppresses vibration of relay 400 due to vibration of the vehicle on which electrical junction box 100 is mounted. Strength reinforcement portion 26 is provided at the center of side wall 22A in the extending direction.

[0050] Figure 5 1 is an exploded view of the electrical junction box 100 according to the embodiment in a state in which the electrical junction box 100 is reversed upside down. Figure 6 yes Figure 4 For convenience of description, the following example will be described in which the strength reinforcement portion 26 is provided only in the middle portion in the extension direction (width direction) of the side wall 22A at the other end of the upper housing 20, but the present invention is not limited thereto.

[0051] The strength reinforcement portion 26 is provided near the side wall 22A. That is, the strength reinforcement portion 26 extends from the center of the side wall 22A to the mounting position of the relay 400 (see Figure 4 The dotted line portion is set in the vicinity of the range.

[0052] The strength reinforcement portion 26 is provided at the inner side of the side wall 22A, and has an inner wall 261 of a plate shape that is convex and curved toward the relay 400 side. In other words, the inner wall 261 is provided on the inner side surface of the side wall 22A, and is substantially U-shaped when viewed from above, and is a curved plate shape in which the distance from the side wall 22A becomes wider as it is farther from each end. The dimension of the inner wall 261 in the vertical direction is higher than that of the side wall 22A. The inner wall 261 is provided in a manner facing the inner side surface of the side wall 22A.

[0053] In addition, in the upper case 20, ribs 262 are provided between the inner wall 261 and the side wall 22A, that is, in a portion surrounded by the inner wall 261 and the side wall 22A. The ribs 262 are, for example, lattice-shaped.

[0054] The above-mentioned fastening portion 23A is provided in the portion surrounded by the inner wall 261 and the side wall 22A in the strength reinforced portion 26. The fastening portion 23A is provided near the side wall 22A. The shape of the fastening portion 23A has been described, and a detailed description thereof will be omitted.

[0055] However, the vehicle vibrates while traveling, and the electrical junction box 100 mounted on the vehicle also vibrates along with the vibration of the vehicle. Such vibration of the electrical junction box 100 may cause the screw connection between the electrical junction box 100 and the vehicle to loosen.

[0056] In addition, as described above, the relay 400 provided in the electrical connection box 100 is provided apart from the side wall 22 of the upper housing 20, and is provided in the substantially central portion of the outer side surface 211 of the top wall 21 for the convenience of operations such as replacement and the ease of circuit configuration. That is, the relay 400 is provided in the central portion of the plate (top wall 21) that is most easily deformed in the vertical direction. In addition, the relay 400 has a coil winding body, so it is heavier than other electronic components and is prone to vibration.

[0057] That is, relay 400 vibrates with the vibration of electrical connection box 100, applying further vibration to electrical connection box 100. Therefore, the vibration of relay 400 increases the vibration amount of electrical connection box 100, further loosening the screw connection between electrical connection box 100 and the vehicle, which needs to be suppressed.

[0058] In the electrical connection box 100 of the present embodiment, as described above, the strength reinforcement portion 26 is provided on the side wall 22A. The strength reinforcement portion 26 is provided in the middle portion of the extension direction of the side wall 22A which is easily bent in the thickness direction, and the rib 262 is formed in the range from the side wall 22A to the vicinity of the relay 400. The vibration direction of the relay 400, that is, the up-down direction, is a direction orthogonal to the thickness direction in the side wall 22A, and the side wall 22A is difficult to deform in the up-down direction. Thus, the strength of the top wall 21 is reinforced by the strength reinforcement portion 26, and the vibration of the relay 400 is suppressed.

[0059] In addition, in the electrical connection box 100 of the present embodiment, as described above, the strength reinforcement portion 26 has the inner wall 261, and the inner wall 261 faces the inner side surface of the side wall 22A and protrudes toward the relay 400 side. Therefore, the inner wall 261 is also difficult to deform in the vertical direction like the side wall 22A, but protrudes (bends) toward the relay 400 side, and the dimension in the vertical direction is higher than that of the side wall 22A, so it is difficult to deform in the vertical direction compared with the side wall 22A. Therefore, the strength reinforcement portion 26 can more reliably suppress the vibration of the relay 400.

[0060] Furthermore, in the electrical connection box 100 of the present embodiment, as described above, the lower case 30 has the bent portion 331 at the portion corresponding to the inner wall 261 of the strength reinforcement portion 26. The bent portion 331 is recessed toward the relay 400 side in the shape of the inner wall 261, and abuts against the inner wall 261 from the inside. The bent portion 331 is also bent toward the relay 400 side in the vertical direction, which is a direction perpendicular to the thickness direction, like the inner wall 261, and is therefore difficult to deform in the vertical direction. Therefore, in the electrical connection box 100 of the present embodiment, the vibration of the relay 400 can be more reliably suppressed.

[0061] Furthermore, in the electrical junction box 100 of this embodiment, as described above, the fastening portion 23A is provided in the strength reinforcement portion 26. The fastening portion 23A is a portion fixed to the object by screwing, and therefore is difficult to deform in the vertical direction. Therefore, the strength reinforcement portion 26 can reliably suppress vibration of the relay 400.

[0062] In the above, the case where the strength reinforcement part 26 is provided only at one place in the central part of the side wall 22A is described as an example, but the present invention is not limited thereto. For example, the strength reinforcement part 26 may be provided at the central part of two parts of the side wall 22 facing each other in the length direction, or at the central part of two parts of the side wall 22 facing each other in the width direction. In addition, the strength reinforcement part 26 may be provided at the central part of two parts of the side wall 22 facing each other in the length direction, and at the central part of two parts of the side wall 22 facing each other in the width direction.

[0063] The embodiments disclosed herein are illustrative in all aspects and should not be considered restrictive. The scope of the present disclosure is indicated by the claims rather than the above, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0064] The matters described in each embodiment can be combined with each other. In addition, the independent claims and dependent claims described in the claims can be combined with each other in all combinations regardless of the reference form. Moreover, the form of recording a claim that references two or more other claims (multiple reference claim form) is used in the claims, but it is not limited to this. It can also be recorded in the form of recording a multiple reference claim (multiple reference multiple claim) that references at least one multiple reference claim. Description of Reference Numerals

[0065] 20 Upper shell (first shell)

[0066] 21 Top wall (one wall)

[0067] 22, 33, 22A side wall

[0068] 23 Fastening part

[0069] 23A Fastening part (installation part)

[0070] 24 lateral ribs

[0071] 24a First outer rib

[0072] 24b Second outer rib

[0073] 25 medial rib

[0074] 26 Strength Enhancement Department

[0075] 27 Open Department

[0076] 30 Lower housing (second housing)

[0077] 31 bottom wall

[0078] 32a recess

[0079] 32b concave part

[0080] 34 through tube

[0081] 36 Open Department

[0082] 50 cabinets

[0083] 100 electrical connection box

[0084] 200 battery pack

[0085] 211 outer side

[0086] 212 connection

[0087] 213 assembly seat

[0088] 214 inner side

[0089] 231 fixed through hole

[0090] 261 Inner wall

[0091] 262 ribs

[0092] 311 Ribs

[0093] 312 inner side

[0094] 313 outer side

[0095] 331 bending part

[0096] 400 relays.

Claims

1. An electrical connection box, comprising: The housing; and The electronic component is arranged on a wall adjacent to the side wall and is separated from the side wall of the box. A strength reinforcement portion is provided from a central portion of the side wall to the vicinity of the electronic component.

2. The electrical connection box according to claim 1, wherein: The box body includes a first shell having the side wall and the first wall, The strength reinforcement portion is provided on the first housing and includes an inner wall provided on the inner side of the side wall and convexly curved toward the electronic component, and a rib provided between the inner wall and the side wall.

3. The electrical connection box according to claim 2, wherein: The box body includes a second shell that closes an open portion of the first shell formed facing the one wall. The side wall of the second housing has a curved portion corresponding to the inner wall.

4. The electrical connection box according to any one of claims 1 to 3, wherein: The strength reinforcing portion has a mounting portion for mounting on an object.

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