Electrical junction box and its mounting structure

Abstract

To provide an electric connection box capable of stably being mounted to a mounting object and improving a degree of freedom of its mounting mode, and a mounting structure thereof.SOLUTION: An electronic control unit 10 having a unit body 20 accommodating therein an ECU circuit 11 generating heat upon current conduction, and a bracket 60 mounting the unit body 20 to a metal column housing 100 to be supported, is mounted to the column housing 100 through the bracket 60 to compose an ECU mounting structure 1. The unit body 20 has a metal base body 50 mounting the ECU circuit 11, and a cover 30 attached to the base body 50 so as to surround the ECU circuit 11. In the base body 50, a bracket mounting part 55 for mounting the bracket 60 is provided, and the electronic control unit 10 is mounted to the column housing 100 in an orientation where the base body 50 is separated further from the column housing 100 than the cover 30.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an electric junction box that houses a component that generates heat when electricity is applied, such as an electronic control circuit, and a mounting structure for the same. [Background technology]

[0002] Automobiles and the like are equipped with many electrical devices, and electrical connection boxes such as electronic control units, relay boxes, and junction boxes are provided. In such electrical connection boxes, circuit components such as electronic components and relays housed inside the case generate heat when electricity is applied, and there is a risk that the circuit components will not operate normally if they become overheated. For this reason, it is necessary to release the heat to the outside of the case, and as described in Patent Document 1, a part of the case is formed of a metal base portion, and the case is configured to release heat from the base portion.

[0003] The electric connection box configured in this manner is mounted on a vehicle by fixing a base portion having high rigidity to the vehicle body or vehicle-mounted components to which it is to be mounted, as described in Patent Document 1. Therefore, the manner in which it is mounted on the vehicle, i.e., the manner in which it is attached to the object to be attached, is limited, and the degree of freedom in the manner in which it is attached is low. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-198551 A Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide an electric junction box and a mounting structure thereof that can be stably mounted to an object and that can improve the degree of freedom in the mounting mode. [Means for solving the problem]

[0006] This invention is characterized in that an electrical junction box includes a housing case that houses a circuit component that generates heat when electricity is passed through it, and a support member that mounts and supports the housing case on a metal mounting object, the housing case having a metal base body on which the circuit component is mounted, and a cover body that is attached to the base body so as to surround the circuit component, the base body being provided with a mounting portion for mounting the support member, and the electrical junction box is mounted in an orientation such that the base body is spaced apart from the cover body relative to the mounting object.

[0007] The present invention also provides a circuit configuration that generates heat when current is applied, a housing case that houses the circuit configuration inside, and a support member that mounts and supports the housing case on a metallic mounting target, the housing case having a metallic base body on which the circuit configuration is mounted, and a cover body that is attached to the base body so as to surround the circuit configuration, and a mounting portion for mounting the support member is provided on the base body. The support member attached to the mounting portion is disposed on the side of the base body on which the cover body is attached so that the support member is attached in a direction in which the base body is spaced apart from the cover body relative to the mounting object. It is characterized by being an electrical junction box.

[0008] The circuit assembly includes electronic components constituting an electronic control circuit, components such as relays and fuses that constitute a specific circuit and generate heat when electricity is applied, and boards, etc. Therefore, the electrical connection box includes an electronic control unit, a relay box, a junction box, etc. The above-mentioned mounting target is a fixable location in the vicinity of a vehicle body mounted component such as a column housing or a location where an electric junction box is disposed on a vehicle panel or the like.

[0009] These inventions enable the electric junction box to be stably attached to an object to be attached, and also improve the degree of freedom in the manner of attachment. In detail, a mounting portion is provided on a metal base body which, together with the cover body, constitutes the storage case, for attaching a support member which mounts and supports the storage case to a metal mounting object, so that the electrical connection box can be firmly and stably attached to the mounting object via the support member.

[0010] In addition, by forming the support member into a desired shape, the electrical connection box can be attached to the attachment target in various attachment modes. In other words, the attachment structure in which the electrical connection box is attached to the attachment target via the support member can improve the degree of freedom of attachment mode compared to the attachment structure in which the base body is directly attached.

[0011] Furthermore, since the electrical junction box is attached to the attachment target via the support member in a direction in which the base body is spaced apart from the cover body, the base body, which has high rigidity, is disposed on the side away from the attachment target, thereby preventing damage due to an accidental collision, etc. Also, since the circuit configuration is mounted on a metal base body, heat can be dissipated from the base body and / or to the attachment target via the support member.

[0012] As an aspect of the present invention, the support member may include a plurality of legs and a fixing portion that straddles the legs and fixes the support member to the attachment object. According to this invention, the electrical junction box can be attached more stably to the attachment object.

[0013] In detail, the support member has a plurality of legs and a fixing portion that straddles the legs and fixes the legs to the mounting object, and since the fixing portion can be fixed to the mounting object, the mounting state is more stable than when the legs are directly attached to the mounting object. Therefore, the mounting state of the electrical connection box attached to the mounting object via the support member can also be stabilized.

[0014] As a further aspect of the present invention, the mounting portion may be provided in a plurality of portions corresponding to the number of the legs, and may be formed to protrude beyond a portion of the base body where the cover body is attached. According to this invention, the distance between the mounting parts can be made wider than the shape of the base body. Therefore, the distance between the legs of the support member can be made wider than the shape of the base body, and the mounting state can be made more stable. In addition, the size of the fixing parts that straddle the support members is also increased, so that the mounting object can be fixed more stably.

[0015] As a further aspect of the present invention, the support member may be formed of a solid metal member. The solid metal member may be a die-cast member, a casting, a machined member, a forged member, or an additively manufactured member.

[0016] According to the present invention, a support member having higher rigidity than a support member made of a hollow member can be formed. In addition, since the support member made of a metal member has thermal conductivity, the heat generated by the circuit configuration is transferred through the base body, and the transferred heat can be transferred to the metal mounting target. Therefore, the heat dissipation of the electrical junction box can be improved. Furthermore, the support member made of a solid metal member has a larger heat capacity than the support member made of a hollow member, and the thermal characteristics of the electrical junction box can be improved.

[0017] As a further aspect of the present invention, the fixing portion may have an abutment surface that abuts against the attachment target. According to this invention, since the fixing portion is in surface contact with the mounting object, the fixing portion can be fixed more firmly to the mounting object. Therefore, a more stable mounting state of the electrical connection box to the mounting object can be realized. Furthermore, since the fixing portion is in surface contact with the mounting object, the thermal conductivity from the support member to the mounting object can be improved, and the heat dissipation of the electrical connection box can be further improved.

[0018] As a further aspect of the present invention, the contact surface may be subjected to a smoothing treatment for smoothing the contact surface. The smoothing treatment may be any treatment for reducing the roughness of the contact surface, such as cutting or polishing, or a chemical treatment.

[0019] According to this invention, the smoothed fixing portion comes into surface contact with the mounting object, thereby further improving thermal conductivity from the support member to the mounting object, and further improving the heat dissipation properties of the electrical junction box.

[0020] As a further aspect of the present invention, the contact surface may be inclined with respect to an extension direction plane along the extension direction of the plurality of leg portions. According to this invention, the support member can be attached to the attachment target in a desired direction. Also, since the contact surface of the fixing part is inclined, the area of ​​the contact surface can be enlarged compared to when it is perpendicular, and the fixing part can be stably fixed to the attachment target.

[0021] As a further aspect of the present invention, the circuit assembly may be an electronic control circuit that controls an electrical component connected thereto. According to this invention, the heat generated by the electronic control circuit inside the electrical connection box, whose thermal characteristics are improved by the support member having a high thermal capacity, can be dissipated from the base body, the support member and the mounting object. Effect of the Invention

[0022] According to the present invention, it is possible to provide an electric junction box and a mounting structure thereof that can be stably mounted to an object to be mounted and that can improve the degree of freedom in the mounting mode. [Brief description of the drawings]

[0023] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] An embodiment of the present invention will be described in detail below with reference to FIGS. In addition, Figure 1 shows an explanatory diagram of an electronic control unit 10, which is an example of an electrical junction box, Figure 2 shows an exploded oblique view of the electronic control unit 10, Figure 3 shows an oblique view of a base body 50, Figures 4 and 5 show explanatory diagrams of a bracket 60, which is an example of a support member, and Figure 6 shows a front view of the ECU mounting structure 1.

[0025] More specifically, Fig. 1(a) shows a perspective view illustrating the front, top, and right side of the electronic control unit 10, and Fig. 1(b) shows a perspective view illustrating the back, bottom, and left side of the electronic control unit 10. Fig. 2 shows an exploded perspective view of the electronic control unit 10 as viewed from the front, top, and right side, and Fig. 3 shows a perspective view of the base body 50 as viewed from the front, top, and left side.

[0026] Figure 4(a) shows an oblique view of the front, top and right side of bracket 60, Figure 4(b) shows an oblique view of the back, bottom and left side of bracket 60, Figure 5(a) shows a front view of bracket 60, Figure 5(b) shows a plan view of bracket 60, and Figure 5(c) shows the right side of bracket 60.

[0027] In Fig. 1(a), the direction connecting the upper left and lower right is the width direction W, the direction connecting the lower left and upper right is the depth direction D, and the up and down direction is the height direction H. In addition, in the width direction W, the upper left side is the width direction left side WL, and the lower right side is the width direction right side WR. In the depth direction D, the lower left side is the front side DF, and the upper right side is the back side DB. In the height direction H, the upper side is the upper side HU, and the lower side is the lower side HD.

[0028] The electronic control unit 10 shown in Figures 1 to 5 is equipped with an ECU circuit 11, a box-shaped unit body 20 that houses the ECU circuit 11, and a bracket 60, and is attached to a column housing 100, which is the object of attachment, as shown in Figure 6, and mounted on a vehicle.

[0029] The ECU circuit 11 is a control circuit that controls electrical equipment (not shown) electrically connected to the electronic control unit 10, and has multiple electronic components 13 mounted on a circuit board 12. When electricity is applied for control, the electronic components 13 generate heat. If the ECU circuit 11 overheats, the electronic components 13 may not operate normally. The electronic components 13 have multiple connection pins 131 that connect to bus bars 42 provided in a connector section 40 (described later) (see FIG. 2).

[0030] The unit body 20 accommodating the ECU circuit 11 therein includes a cover 30 , a connector portion 40 , and a base body 50 . The cover 30 is attached to the base body 50 on which the ECU circuit 11 is mounted so as to surround the ECU circuit 11 as described below, and is formed in a box shape with an open bottom. In more detail, the cover 30 is generally rectangular in plan view with a width direction W longer than a depth direction D, and the height direction H is shorter than the width direction W and the depth direction D, and is a box shape with an open bottom.

[0031] The cover 30 is made of resin and has an arrangement opening 31 on the front side in which the connector part 40 described later is arranged, and locking hooks 32 that engage with locking frames 54 of the base body 50 described later are arranged at a predetermined interval in the depth direction D below both side surfaces in the width direction W.

[0032] The connector section 40 is an interface into which a connector (not shown) that electrically connects to the ECU circuit 11 is inserted for connection, and has insertion spaces 41 (41a, 41b) that are open on the front side and arranged side by side in the width direction W. More specifically, two small insertion spaces 41a for inserting small connectors and two large insertion spaces 41b for inserting large connectors are arranged in a row from the left side WL in the width direction to the right side WR in the width direction.

[0033] A bus bar 42 is led out to the rear side DB of the insertion space 41, and is connected to the connection pins of the connector inserted into the insertion space 41 and electrically connected to the connection pins 131 of the electronic component 13 described above.

[0034] The base body 50 on which the ECU circuit 11 is mounted is made of aluminum die-cast and comprises a substantially plate-shaped base body 51 which forms the bottom of the unit body 20, i.e., the bottom surface of the cover 30 which is open downward, and a bracket mounting portion 55 which protrudes from the base body 51 to the left side WL in the width direction.

[0035] The base body 51 corresponds to the cover 30, is formed in a generally rectangular shape in plan view with a width direction W being slightly longer than a depth direction D, and has an edge portion 52 that protrudes to an upper side HU along the outer periphery. Further, the base body 51 protrudes toward the upper side HU compared to other portions, and a mounting table 53 for mounting the ECU circuit 11 is provided on the left side WL and the rear side DB in the width direction.

[0036] Furthermore, on the edge portion 52 in the width direction W, locking frames 54 corresponding to the locking hooks 32 of the cover 30 are arranged at predetermined intervals in the depth direction D. The bracket attachment portion 55 protruding from the base body 51 to the left side WL in the width direction is a portion for attaching a bracket 60 described later. Two bracket attachment portions 55 are provided corresponding to the number of legs 70 and are integral with the base body 51 .

[0037] Specifically, the bracket mounting portions 55 (55a, 55b) are provided in two locations at the end of the left side in the width direction WL of the base body 51, which is formed in a roughly rectangular shape in a plan view with the width direction W being one size longer than the depth direction D, so as to protrude from the end of the front side DF and the end of the rear side DB toward the left side in the width direction WL.

[0038] In detail, the front mounting portion 55a provided at the end of the left side WL in the width direction and the end of the front side DF is formed in an isosceles triangular shape in a plan view so as to extend diagonally from the corner of the left side WL and the front side DF of the base body 51 in the width direction to the left side WL and the front side DF, as shown in Figure 3.

[0039] At the end of the left side WL in the width direction, the rear mounting portion 55b provided at the end of the rear side DB extends in a straight line with the rear side DB of the base body 51 and is formed in a right-angled triangular shape in a plan view extending diagonally toward the front side DF, as shown in Figure 3.

[0040] The bracket mounting portion 55 configured in this manner is provided with bolt holes 551 through which the bolts 2 can be inserted. The bolt holes 551 provided in the front mounting portion 55a are round holes, while the bolt holes 551 provided in the rear mounting portion 55b are elongated holes that are long in the depth direction D. The intervals between the bolt holes 551 are formed at substantially the same intervals as the intervals between the legs 70 of the bracket 60, which will be described later. The base body 50 thus constructed is made of die-cast aluminum as described above, so that heat from the ECU circuit 11 mounted on the mounting base 53 is transferred to the entire body and can be dissipated.

[0041] The bracket 60, which supports the electronic control unit 10 by mounting it to the column housing 100 to which it is to be mounted, is formed in a general gate shape in side view with two legs 70 and a fixing part 80 that straddles the legs 70 and fixes the electronic control unit 10 to the column housing 100. 、2 The bracket 60, which is formed by the leg portion 70 and the fixing portion 80 in a generally gate-like shape when viewed from the side, is made of aluminum die-casting.

[0042] The legs 70 are columnar with rounded corners and rectangular shape when viewed from the bottom, extending in the height direction H, correspond to the bracket attachment parts 55 of the base body 50, and are arranged at a predetermined interval in the depth direction D. The two legs 70 have a front leg 70a on the near side DF and a rear leg 70b on the far side DB.

[0043] The bottom surface 71 of the leg portion 70 (70a, 70b) is provided with a screw hole 72 into which the bolt 2 inserted through the bolt hole 551 of the bracket attachment portion 55 is screwed. The surface of the bottom surface 71 is smoothed by cutting.

[0044] The fixing portion 80 is a portion that straddles the two leg portions 70 (70a, 70b) and is fixed to the column housing 100, and has an abutment surface 82. Specifically, the fixing portion 80, which straddles the two legs 70 (70a, 70b) arranged at a distance in the depth direction D, extends from the rear leg 70b of the rear side DB toward the front side DF, as shown in Figures 4 and 5, and is formed in an approximately parallelogram shape in a plan view so as to protrude into the front side DF beyond the front leg 70a of the front side DF and also protrude to the right side WR in the width direction.

[0045] The upper surface of the fixed part 80 is provided with an inclined surface 81 that gradually inclines downward HD from the near side DF slightly forward of the rear leg 70b toward the far side DB, and an abutment surface 82 that inclines toward the near side DF and the right side WR in the width direction, extending from the rear leg 70b to the end of the near side DF on the right side WR in the width direction of the leg 70. In other words, the inclined surface 81 and the abutment surface 82 are surfaces that incline with respect to a plane (a plane along the width direction W and depth direction D) perpendicular to the height direction H in which the leg 70 extends. The contact surface 82 is provided with insertion holes 83 at predetermined intervals in the depth direction D, penetrating in the thickness direction and through which the bolts 2 that screw into the column housing 100 are inserted.

[0046] Of the two insertion holes 83, the insertion hole 83 on the far side DB is a round hole, whereas the insertion hole 83 on the near side DF is an elongated hole that is long in the depth direction D. The contact surface 82, which is a surface inclined with respect to a plane perpendicular to the height direction H in which the leg portion 70 extends, is smoothed by cutting.

[0047] In the electronic control unit 10 having the various elements thus configured, the ECU circuit 11 is mounted on the mounting stand 53 of the base body 50, and the cover 30 is attached to the base body 51 so as to cover the upper HU. At this time, the locking hooks 32 of the cover 30 are locked into the locking frames 54 of the base body 50, so that the cover 30 is attached to the base body 50, and the unit body 20 can be formed.

[0048] Furthermore, bracket 60 can be positioned so that leg 70 corresponds to bracket mounting portion 55 of base body 50 , and bracket 60 can be fixed to base body 50 by screwing bolt 2 into screw hole 72 of leg 70 .

[0049] Specifically, bracket 60 is placed on base body 50 so that bolt hole 551 in bracket attachment part 55 protruding from base main body 51 of base body 50 to the left side WL in the width direction is aligned with screw hole 72 in leg part 70 of bracket 60, and bolt 2 inserted through bolt hole 551 is screwed into screw hole 72, thereby assembling base body 50 and bracket 60. At this time, bottom surface 71 smoothed by cutting comes into close contact with the surface of bracket attachment part 55.

[0050] In this manner, the electronic control unit 10 can be constructed by assembling the ECU circuit 11, the unit body 20, and the cover 30 to the base body 50 and fixing the bracket 60 to the bracket attachment portion 55 of the base body 50. It should be noted that the assembly of the ECU circuit 11, the cover 30, and the unit body 20 to the base body 50 and the assembly of the bracket 60 to the base body 50 may be performed in any order.

[0051] The electronic control unit 10 configured as described above is an object to be mounted, and is mounted to a metal column housing 100 to form the ECU mounting structure 1, as shown in FIG. Specifically, the abutment surface 82 of the bracket 60 provided on the electronic control unit 10 is positioned to match the surface of the mounting portion 101 provided on the bottom side of the column housing 100, and the electronic control unit 10 is attached to the column housing 100 by fastening with bolts 2, thereby forming the ECU mounting structure 1.

[0052] In this manner, in the ECU mounting structure 1 in which the electronic control unit 10 is mounted to the column housing 100 via the bracket 60, the bracket 60 protruding to the left side WL in the width direction of the electronic control unit 10 is positioned below the column housing 100 in the mounted state, and the base body 50 of the unit main body 20 is positioned in a position spaced apart from the column housing 100.

[0053] As described above, in the ECU mounting structure 1, the electronic control unit 10 is mounted to the column housing 100 via the bracket 60. The electronic control unit 10 includes the ECU circuit 11 that generates heat when energized, the unit body 20 that houses the ECU circuit 11 therein, and the bracket 60 that mounts and supports the unit body 20 on the metal column housing 100.

[0054] The unit main body 20 has a metal base body 50 on which the ECU circuit 11 is mounted, and a cover 30 attached to the base body 50 so as to surround the ECU circuit 11, and a bracket mounting portion 55 for mounting a bracket 60 is provided on the base body 50.

[0055] The electronic control unit 10 is attached to the column housing 100 in a direction such that the base body 50 is spaced apart from the cover 30. Therefore, the ECU mounting structure 1 can stably mount the electronic control unit 10 to the column housing 100, and can improve the degree of freedom of the mounting mode.

[0056] In detail, a bracket mounting portion 55 is provided on the metal base body 50 which, together with the cover 30, constitutes the unit main body 20, for mounting a bracket 60 which mounts and supports the unit main body 20 on a metal column housing 100, so that the electronic control unit 10 can be firmly and stably mounted on the column housing 100 via the bracket 60.

[0057] Furthermore, by forming the bracket 60 into a desired shape as described above, the electronic control unit 10 can be attached to the column housing 100 in various attachment modes. In other words, the ECU attachment structure 1 in which the electronic control unit 10 is attached to the column housing 100 via the bracket 60 can improve the degree of freedom in the attachment mode compared to an attachment structure in which the base body 50 is directly attached to the column housing 100.

[0058] Furthermore, since the electronic control unit 10 is attached to the column housing 100 via the bracket 60 in an orientation in which the base body 50 is away from the cover 30, the highly rigid base body 50 is disposed on the side away from the column housing 100, preventing damage due to an inadvertent collision or the like. Also, since the ECU circuit 11 is mounted on the metal base body 50, heat can be dissipated from the base body 50 and / or to the column housing 100 via the bracket 60.

[0059] In addition, since the bracket 60 is provided with multiple legs 70 and a fixing portion 80 that spans the legs 70 and fixes the bracket 60 to the column housing 100, the electronic control unit 10 can be attached more stably to the column housing 100.

[0060] More specifically, the bracket 60, which is provided with a plurality of legs 70 and a fixing portion 80 that straddles the legs 70 and fixes them to the column housing 100, can fix the fixing portion 80 to the column housing 100, so that the mounting state is more stable than when the legs 70 are directly attached to the column housing 100. Therefore, the mounting state in which the electronic control unit 10 is mounted to the column housing 100 via the bracket 60 can also be stabilized.

[0061] In addition, the bracket mounting portions 55 are provided in two locations corresponding to the two legs 70 (70a, 70b), and are formed on the base body 50 so as to protrude beyond the base main body 51 on the left side WL and the front side DF in the width direction, so that the spacing between the bracket mounting portions 55 can be made wider than the shape of the base main body 51.

[0062] Therefore, the distance between the legs 70 in the bracket 60 can be made wider than the shape of the base body 51, and the mounting state can be made more stable. In addition, the size of the fixing portion 80 that straddles the legs 70 is also increased, so that the bracket 60 can be fixed to the column housing 100 more stably.

[0063] Furthermore, since the bracket 60 is made of a solid aluminum die-cast material, it is possible to improve the strength compared to a bracket made of a hollow member. In addition, since the bracket 60 made of aluminum die casting has thermal conductivity, the heat generated by the ECU circuit 11 is transferred via the base body 50, and the transferred heat can be transferred to the metal column housing 100. This improves the heat dissipation of the electronic control unit 10. Furthermore, the bracket 60 made of a solid metal member has a larger heat capacity than a bracket made of a hollow member, and can improve the thermal characteristics of the electronic control unit 10.

[0064] Furthermore, since the base body 50 is also made of a solid aluminum die-cast, the strength can be improved compared to when it is made of a hollow member. In addition, the base body 50 made of aluminum die casting also has thermal conductivity, and therefore can dissipate heat generated by the ECU circuit 11 and transmit it to the bracket 60. This improves the heat dissipation of the electronic control unit 10. Furthermore, the base body 50 made of a solid metal member has a larger heat capacity than a hollow member, and can improve the thermal characteristics of the electronic control unit 10.

[0065] In addition, since the fixing portion 80 has an abutment surface 82 that abuts against the column housing 100, the fixing portion 80 comes into surface contact with the column housing 100, and the fixing portion 80 can be more firmly fixed to the column housing 100. Therefore, a more stable mounting state of the electronic control unit 10 to the column housing 100 can be realized. In addition, since the fixing portion 80 comes into surface contact with the column housing 100, the thermal conductivity from the bracket 60 to the column housing 100 can be improved, and the heat dissipation of the electronic control unit 10 can be further improved.

[0066] In addition, since the abutment surface 82, which comes into surface contact with the mounting portion 101 of the column housing 100, is subjected to a cutting process as a smoothing process, the thermal conductivity from the bracket 60 to the column housing 100 can be further improved, and the heat dissipation properties of the electronic control unit 10 can be further improved.

[0067] Furthermore, the bottom surface 71, which comes into surface contact with the bracket mounting portion 55 of the base body 50, is also subjected to cutting as a smoothing process, thereby further improving the thermal conductivity from the base body 50 to the bracket 60 and further improving the heat dissipation properties of the electronic control unit 10.

[0068] Furthermore, since the abutment surface 82 is inclined with respect to a plane along the height direction H and depth direction D of the multiple legs 70, the bracket 60 can be attached to the column housing 100 in the desired orientation as shown in Figure 6.

[0069] Furthermore, since the abutment surface 82 of the fixed portion 80 is inclined, the area of ​​the abutment surface 82 can be enlarged compared to forming the surface along the width direction W and the depth direction D, and the fixed portion 80 can be stably fixed to the column housing 100.

[0070] In addition, since the ECU circuit 11 is a circuit that controls the connected electrical equipment, the heat generated by the ECU circuit 11 inside the electronic control unit 10, whose thermal characteristics are improved by the bracket 60 having a high thermal capacity, can be dissipated from the base body 50, the bracket 60, and the column housing 100.

[0071] In the configuration of the present invention and the correspondence between the embodiments, the circuit configuration and the electronic control circuit of the present invention correspond to the ECU circuit 11, Similarly, The storage case is compatible with the unit body 20. The mounting target is compatible with column housing 100. The support member corresponds to the bracket 60; The electrical junction box corresponds to the electronic control unit 10, The base body corresponds to the base body 50, The cover body is compatible with Cover 30. The mounting part corresponds to the bracket mounting part 55, The electrical connection box mounting structure corresponds to ECU mounting structure 1. The column corresponds to the leg 70, The fixed part corresponds to the fixed part 80, The cover body is attached to the base body 51. Although the abutment surface corresponds to abutment surface 82, this invention is not limited to the configuration of the above-described embodiment, and can be applied based on the technical ideas shown in the claims, and many embodiments can be obtained.

[0072] For example, in the above explanation, the electronic control unit 10 incorporating the ECU circuit 11 is attached to the column housing 100 to form the ECU mounting structure 1, but a relay box or junction box that houses other electronic components, relays, fuses, etc. instead of the ECU circuit 11 may also be attached to the column housing 100 to form a mounting structure for an electrical connection box.

[0073] Furthermore, the electronic control unit 10 is attached to the column housing 100, but the electronic control unit 10 may be attached to a vehicle body mounted component other than the column housing 100, a vehicle panel, or the like.

[0074] Furthermore, as solid metal components, the base body 50 and the bracket 60 are made of aluminum die-casting, but at least one of the base body 50 and the bracket 60 may be made of a die-cast component of another type of metal, or may be made of a casting, a machined component, a forged component, or an additively molded component, etc.

[0075] In addition, in the aluminum die-cast bracket 60, the contact surface 82 and the bottom surface 71 are subjected to cutting as a smoothing treatment, but various other processes such as polishing other than cutting may be used, or smoothing may be performed by chemical treatment, etc. The bracket mounting portion 55 and the mounted portion 101 of the column housing 100 may also be subjected to a similar smoothing treatment. Furthermore, although the bracket 60 is provided with two legs 70, it may have one leg 70, or three or more legs 70. [Explanation of symbols]

[0076] 1...ECU mounting structure 10...Electronic control unit 11…ECU circuit 20…Unit body 30…Cover 50...Base body 51…Bass body 55…Bracket mounting part 60…Bracket 70…legs 80…Fixed part 82…Abutment surface 100…Column housing

Claims

1. an electric connection box including a housing case that houses a circuit structure that generates heat when electricity is applied thereto and a support member that supports the housing case on a metal mounting object; the electric connection box being attached to the mounting object via the support member; The storage case includes: a metal base body on which the circuit configuration is mounted; a cover body attached to the base body so as to surround the circuit configuration body, The base body is provided with a mounting portion for mounting the support member, The electrical connection box is attached to the attachment object in such a direction that the base body is spaced apart from the cover body. Mounting structure for electrical junction box.

2. The support member is A plurality of legs; A fixing portion that straddles the leg portions and fixes the leg portions to the mounting object is provided.

2. The electrical junction box mounting structure according to claim 1.

3. The mounting portion is provided in a number corresponding to the number of the legs, and is formed to protrude from a portion of the base body where the cover body is attached.

3. The electrical junction box mounting structure according to claim 2.

4. The support member is formed of a solid metal member.

3. The electrical junction box mounting structure according to claim 2.

5. The fixing portion has a contact surface that contacts the attachment object.

5. The mounting structure for an electric junction box according to claim 4.

6. The contact surface is subjected to a smoothing treatment.

6. The electrical junction box mounting structure according to claim 5.

7. The contact surface is inclined with respect to an extension direction plane along the extension direction of the plurality of legs.

6. The electrical junction box mounting structure according to claim 5.

8. The circuit assembly is an electronic control circuit that controls connected electrical equipment.

8. The mounting structure for an electric junction box according to claim 1.

9. A circuit structure that generates heat when current is applied; a housing case for housing the circuit assembly therein; a support member that supports the housing case by attaching it to a metal mounting target, The storage case includes: a metal base body on which the circuit configuration is mounted; a cover body attached to the base body so as to surround the circuit configuration body, The base body is provided with a mounting portion for mounting the support member, The support member attached to the mounting portion is disposed on the side of the base body on which the cover body is attached so that the support member is attached in an orientation in which the base body is spaced apart from the cover body relative to the mounting object. Electrical junction box.

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