JP2018186648A - Electric connection box and wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric connection box and a wire harness which can reduce a destruction of a body at a time of a front collision of a vehicle.SOLUTION: An electric connection box 1 includes: a body 4 which is disposed so that one of a plurality wall surfaces 4a stood in a circumferential direction faces a front of a vehicle, and accommodates at least a single electronic component 2 within an inner space; a bracket 9 having a fixing portion 9a fixed to a vehicle body 101 of the vehicle; and an engagement mechanism 11 provided between the body 4 and the bracket 9, and engaging the bracket 9 to the body 4 from the front of the vehicle toward the rear. When external force toward the rear of the vehicle is applied to the wall surface 4a of the body 4 facing the front of the vehicle by a shock due to a collision of the vehicle, the engagement mechanism 11 removes the body 4 from the front of the vehicle to the rear with respect to the bracket 9 before the fixing portion 9a is detached from the vehicle 101.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electrical junction box and a wire harness.

  Conventionally, an electrical junction box (junction box, fuse box, relay box) that is mounted on a vehicle such as an automobile and collects and accommodates electronic components such as fuses and relays and wire harnesses that are electrically connected to the electronic components. Are also known). In such an electrical junction box, for example, as in Patent Documents 1 to 5, when a vehicle collides, even if a strong impact is applied to the electrical junction box from the front, other parts located at the rear There has been proposed a device capable of preventing a collision with the vehicle and jumping into the vehicle interior.

JP 2002-159116 A JP 2005-119331 A JP 2006-296072 A JP2011-223799A JP 2011-234495 A

  Some conventional electrical junction boxes have a structure in which a bracket extending from a housing is fixed to a vehicle body. When the bracket is firmly fixed to the vehicle body, even if the vehicle collides forward and a strong impact is applied to the electrical junction box, the electrical junction box cannot be separated from the vehicle body. Otherwise, the housing may be damaged by the collision of other parts.

  It is an object of the present invention to provide an electrical junction box and a wire harness that can reduce the breakage of a casing at the time of a frontal collision of a vehicle.

  In order to achieve the above object, an electrical junction box according to the present invention is arranged such that one of a plurality of wall surfaces erected in the circumferential direction is opposed to the front of a vehicle, and at least one electronic component is mounted. A housing housed in an internal space, an attachment member having a fixing portion fixed to the vehicle body of the vehicle, and provided between the housing and the attachment member, and the attachment to the housing An engagement mechanism that engages a member from the front to the rear of the vehicle, and the engagement mechanism is arranged on the wall surface of the casing that faces the front of the vehicle due to an impact caused by a collision of the vehicle. When an external force directed to the rear of the vehicle acts, the housing is separated from the front of the vehicle to the rear of the mounting member before the fixing portion is detached from the vehicle body.

  In the electrical junction box, the engagement mechanism is provided on a side opposite to the fixing portion of the mounting member, and a sliding mechanism that allows the housing to slide from the front of the vehicle to the rear of the mounting member. An engaging portion that is positioned and engages the mounting member with the housing; and an engaged portion that is positioned on the outer bottom surface of the housing and that engages the engaging portion from the front to the rear of the vehicle. And when the external force acting toward the rear of the vehicle acts on the wall surface of the housing facing the front of the vehicle due to an impact caused by the collision of the vehicle, It is preferable that the housing is slid from the front of the vehicle to the rear with respect to the mounting member by the slide mechanism.

  In order to achieve the above object, a wire harness according to the present invention is arranged such that one of a plurality of wall surfaces erected in the circumferential direction is opposed to the front of a vehicle, and includes at least one electronic component inside. A housing housed in a space; an attachment member having a fixing portion fixed to the vehicle body of the vehicle; and the attachment member provided between the housing and the attachment member An engagement mechanism for engaging the vehicle from the front to the rear of the vehicle, and a conductive routing member electrically connected to the electronic component, the engagement mechanism Is attached before the fixing portion is detached from the vehicle body when an external force directed toward the rear of the vehicle is applied to the wall surface of the casing facing the front of the vehicle due to an impact caused by a collision of the vehicle. The vehicle body with respect to the member Disengaging from the front to the rear, characterized in that.

  According to the electric junction box and the wire harness according to the present invention, it is possible to reduce the damage to the housing at the time of a vehicle frontal collision.

FIG. 1 is a perspective view illustrating a schematic configuration of an electrical junction box according to the embodiment. FIG. 2 is a partial perspective view showing a schematic configuration of a bracket constituting the electrical junction box according to the embodiment. FIG. 3 is a partial perspective view showing a part of a housing constituting the electrical junction box according to the embodiment. FIG. 4 is a cross-sectional view of the main part of the housing constituting the electrical junction box according to the embodiment. FIG. 5 is a cross-sectional perspective view of a main part of a housing constituting the electrical junction box according to the embodiment. FIG. 6 is a perspective view illustrating a schematic configuration of an electrical junction box according to a modified example of the embodiment.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by embodiment shown below. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

[Embodiment]
FIG. 1 is a perspective view illustrating a schematic configuration of an electrical junction box according to the embodiment. FIG. 2 is a partial perspective view showing a schematic configuration of a bracket constituting the electrical junction box according to the embodiment. FIG. 3 is a partial perspective view showing a part of a housing constituting the electrical junction box according to the embodiment. FIG. 4 is a cross-sectional view of the main part of the housing constituting the electrical junction box according to the embodiment. FIG. 5 is a cross-sectional perspective view of a main part of a housing constituting the electrical junction box according to the embodiment. In FIG. 1, a part of the electronic component is illustrated with a two-dot chain line omitted, and the electronic component is not illustrated in other drawings. In addition, FIG. 1 illustrates a part of the electric wire and the wiring material with a two-dot chain line omitted, and the illustration of the electric wire and the wiring material is omitted in other drawings. 1, FIG. 4, and FIG. 5 show a state in which the bracket is engaged with the housing, and FIGS. 2 and 3 show a state in which the bracket is detached from the housing. FIG. 4 is a partial cross-sectional view of the main part in AA of FIG. FIG. 5 is a partial cross-sectional view of a main part in BB of FIG. Moreover, in the following description, the illustrated vertical direction is the vertical direction of the electrical junction box in the present embodiment, and is a direction orthogonal to the illustrated longitudinal direction and traveling direction. The illustrated longitudinal direction is the longitudinal direction of the electrical junction box in the present embodiment, and is a direction orthogonal to the traveling direction. The traveling direction shown in the figure is the traveling direction of a vehicle (not shown) and is the short direction of the electrical junction box in the present embodiment.

  The electrical junction box 1 according to the present embodiment is mounted on a vehicle such as an automobile and is incorporated in the wire harness WH. The wire harness WH is, for example, a bundle of a plurality of wiring materials W used for power supply and signal communication for connection between devices mounted on a vehicle, and a plurality of wirings with a connector or the like The material W is connected to each device. The wire harness WH includes a conductive wiring material W, an exterior material C into which the wiring material W is inserted, and an electrical connection box 1 that is electrically connected to the wiring material W. The routing material W is configured by, for example, a metal rod, an electric wire, an electric wire bundle, or the like. The metal rod is obtained by covering the outside of a conductive rod-shaped member with an insulating covering portion. The electric wire is obtained by covering the outside of a conductor portion (core wire) made of a plurality of conductive metal wires with an insulating covering portion. The electric wire bundle is a bundle of the electric wires. The exterior material C is covered with the wiring material W and protects the wiring material W, and is, for example, a corrugated tube formed in a substantially cylindrical shape having flexibility by an insulating resin material. The wire harness WH bundles and aggregates a plurality of wiring materials W, and the electrical connection box 1 is electrically connected through terminals, connectors, and the like provided at the terminals of the bundled wiring materials W. In addition to this, the wire harness WH may further include a grommet, a protector, a fixture, and the like.

  The electrical connection box 1 collects and accommodates electrical components such as connectors, fuses, relays, capacitors, branch parts, and electronic control units. The electrical junction box 1 is installed in an engine room of a vehicle, for example. The electrical junction box 1 is connected between a power source such as a battery and various electronic devices mounted in the vehicle via a routing member W or the like. The electrical junction box 1 distributes the electric power supplied from the power source to various electronic devices mounted in the vehicle. The electrical junction box 1 may be called a junction box, a fuse box, a relay box, or the like. In the present embodiment, these are collectively called an electrical junction box.

  As shown in FIG. 1, the electrical junction box 1 of the present embodiment includes an electronic component 2, a housing 4, and a bracket 9. The electrical junction box 1 is accommodated in the housing 4 in a state where the electronic component 2 is assembled to a block (not shown). The electronic component 2 is provided in the housing 4 in a state assembled to a block, and the wiring member W is electrically connected thereto. A plurality of electronic components 2 are provided. The electronic component 2 is, for example, a connector, a fuse, a relay, a capacitor, a branching unit, a transistor, an electronic control unit, an electronic component unit obtained by unitizing these, or the like. The block is assembled with the electronic component 2 and is detachably attached to the housing 4. The block has a number of cavities (not shown). The block is fitted with a terminal, a connector or the like provided on the end of the routing material W from the lower side in the vertical direction and the electronic component 2 from the upper side in the vertical direction with respect to the cavity. The electronic component 2 and the routing material W are electrically connected and held. The electronic component 2 is accommodated in the internal space of the housing 4 in a state assembled to the block. Hereafter, each structure of the housing | casing 4 of the electrical-connection box 1 is demonstrated in detail with reference to each figure.

  As shown in FIG. 1, the housing 4 accommodates the electronic component 2 in an internal space formed inside. The housing 4 includes a frame 3 as a housing body, an upper cover 5, and a lower cover 7. The casing 4 is formed in a substantially rectangular parallelepiped box shape as a whole by combining the frame 3, the upper cover 5, and the lower cover 7. The casing 4 of the present embodiment is generally formed in a substantially rectangular parallelepiped box shape in which the direction along the longitudinal direction is the long side and the direction along the short direction is the short side. The housing 4 of the present embodiment is arranged so that one of the plurality of wall surfaces 4a erected in the circumferential direction faces the front of the vehicle. The housing 4 has a structure in which a plurality of layers (three layers) are laminated in the order of the lower cover 7, the frame 3, and the upper cover 5 from the lower side in the vertical direction. The casing 4 is stacked along the vertical direction and assembled to each other, and defines an internal space in which the plurality of electronic components 2 are accommodated. The frame 3, the upper cover 5, and the lower cover 7 are made of an insulating synthetic resin.

  The frame 3 is a part of the housing 4. The frame 3 is a main member that forms an internal space that houses the electronic component 2. The frame 3 has a main body side wall surface 3a which is a wall body forming an internal space. The frame 3 is formed in a hollow shape by a main body side wall surface 3a formed in a polygonal cylindrical shape (substantially rectangular cylindrical shape). The frame 3 is open on both sides in the vertical direction.

  The upper cover 5 is a part of the housing 4. The upper cover 5 is a lid-like member that closes an upper opening (not shown) in the vertical direction of the frame 3. The upper cover 5 is hollowed by a lid-like member side wall surface 5a that is a wall body formed in a polygonal cylindrical shape (rectangular cylindrical shape) and a ceiling surface 5b that is a ceiling body that closes the upper opening of the frame 3. It is formed. The upper cover 5 is locked to the frame 3 by the locking mechanism 31 with the opening of the upper cover 5 facing the upper opening of the frame 3 in the vertical direction.

  The lower cover 7 is a part of the housing 4. The lower cover 7 is a dish-shaped (tray-shaped) member that closes a lower opening (not shown) in the vertical direction of the frame 3. The lower cover 7 is hollowed by a lid-like member side wall surface 7a that is a wall body formed in a polygonal cylindrical shape (rectangular cylindrical shape) and an outer bottom surface 7b that is a bottom body that closes the lower opening of the frame 3. It is formed. The lower cover 7 is locked to the frame 3 by the locking mechanism 51 in a state where the opening of the lower cover 7 is vertically opposed to the lower opening of the frame 3. The lower cover 7 has an insertion hole 30. The insertion hole 30 is formed by the frame 3 and the lower cover 7. The insertion hole 30 is a portion through which the routing material W assembled to the frame 3 is inserted and holds the exterior material C in the radial direction.

  The bracket 9 is an attachment member. As shown in FIGS. 1 and 2, the bracket 9 is for fixing the electrical junction box 1 including the housing 4 to the vehicle body 101 of the vehicle. The bracket 9 of this embodiment is formed separately from the lower cover 7 and is engaged with the lower end portion of the lower cover 7 by the engagement mechanism 11. The bracket 9 is formed of an insulating synthetic resin, like the housing 4. The bracket 9 has a fixing portion 9a and a through hole 9b. The fixing portion 9 a is a portion that is fixed to the vehicle body 101 of the vehicle in the bracket 9. The through hole 9b is a hole provided in the fixing portion 9a and penetrating in the vertical direction of the bracket 9. The bracket 9 is fixed to the vehicle body 101 by tightening the nut with the through hole 9b inserted through the stud bolt 102 of the vehicle body 101.

  As shown in FIGS. 2, 3, and 4, the engagement mechanism 11 is provided between the housing 4 and the bracket 9, and the bracket 9 faces the housing 4 from the front to the rear of the vehicle. To be engaged. More specifically, the engagement mechanism 11 is provided between the lower cover 7 and the bracket 9 constituting the housing 4, and engages the bracket 9 with the lower cover 7 from the front to the rear of the vehicle. The engagement mechanism 11 of the present embodiment is more effective than the case where the fixed portion 9a is detached from the vehicle body when an external force acting toward the rear of the vehicle acts on the wall surface 4a of the housing 4 facing the front of the vehicle due to an impact caused by a vehicle collision. First, the housing 4 is detached from the front of the vehicle to the rear with respect to the bracket 9. The engagement mechanism 11 includes a slide mechanism 13, an engaged portion 73, and an engagement portion 93.

  The slide mechanism 13 enables the bracket 9 to slide with respect to the housing 4 from the front of the housing 4 (front of the vehicle) to the rear. In other words, the slide mechanism 13 enables the housing 4 to slide relative to the bracket 9 from the front to the rear of the vehicle. The slide mechanism 13 includes slide rail portions 71 and 72 and guide hole portions 91 and 92. The slide rail portions 71 and 72 are formed in parallel with the outer bottom surface 7b of the lower cover 7 and extend from the front to the rear in the traveling direction of the vehicle. As shown in FIGS. 3 and 4, each of the slide rail portions 71 and 72 has a cross section viewed from the advancing direction formed in an L shape and a cross section formed in an inverted L shape. The guide hole portions 91 and 92 are located on the opposite side of the fixing portion 9a of the bracket 9 and are formed in parallel to the surface facing the outer bottom surface 7b of the lower cover 7, and forward from the rear in the vehicle traveling direction. Extending towards. The guide hole portions 91 and 92 are portions into which the slide rail portions 71 and 72 are inserted when the bracket 9 is engaged with the housing 4.

  The engaged portion 73 is located on the outer bottom surface 7b of the lower cover 7 and is a portion where the engaging portion 93 engages from the front to the rear of the vehicle. The engaged portion 73 is between the slide rail portion 71 and the slide rail portion 72 formed adjacent to the longitudinal direction perpendicular to the extending direction of the slide rail portion 71 in the outer bottom surface 7 b of the lower cover 7. Is formed. As shown in FIG. 5, the engaged portion 73 has an inverted trapezoidal cross section viewed from the longitudinal direction, and protrudes downward from the outer bottom surface 7 b in the vertical direction. The engaged portion 73 has an engaged surface 73a and a guide surface 73b. The engaged surface 73 a is a substantially flat surface formed on the surface facing downward in the protruding portion of the engaged portion 73. The engaged surface 73a is formed at a position facing the engaging surface 93a of the engaging portion 93 of the bracket 9 in the traveling direction when the engaging portion 93 and the engaged portion 73 are engaged. The guide surface 73b is an inclined surface formed so as to be inclined from the tip side toward the outer bottom surface 7b in the protruding portion of the engaged portion 73.

  The engaging portion 93 is a portion that is located on the opposite side of the fixing portion 9 a of the bracket 9 and engages the bracket 9 with the housing 4. The engaging portion 93 includes a guide hole portion 91 and a guide hole portion 92 formed adjacent to the longitudinal direction perpendicular to the extending direction of the guide hole portion 91 among the surfaces facing the outer bottom surface 7 b of the lower cover 7. Is formed between. The engagement portion 93 is engaged with the engaged portion 73 by the slide mechanism 13 causing the bracket 9 to slide the slide rail portions 71 and 72 from the front to the rear of the vehicle. As shown in FIG. 5, the engaging portion 93 has a trapezoidal cross section when viewed from the longitudinal direction, and protrudes upward in the vertical direction from the surface facing the outer bottom surface 7 b of the lower cover 7. The engaging part 93 has an engaging surface 93a and a guide surface 93b. The engagement surface 93 a is a substantially flat surface formed on the surface facing upward in the protruding portion of the engagement portion 93. The engaging surface 93a is formed at a position facing the engaged surface 73a of the engaged portion 73 of the housing 4 in the traveling direction when the engaging portion 93 and the engaged portion 73 are engaged. The guide surface 93b is an inclined surface formed so as to be inclined from the distal end side toward the surface facing the outer bottom surface 7b of the lower cover 7 in the protruding portion of the engaging portion 93. The guide surface 73b and the guide surface 93b are formed by sliding the bracket 9 with respect to the housing 4 by the slide mechanism 13 to engage the engaging portion 93 with the engaging operation of engaging the bracket 9 with the housing 4. When the engagement with the engaged portion 73 is started, they come into surface contact with each other and guide the engaging surface 93a to the engaged surface 73a. The engaging portion 93 and the engaged portion 73 in the present embodiment are applied to the vehicle body 101 when an external force toward the rear of the vehicle acts on the wall surface 4a of the housing 4 facing the front of the vehicle due to an impact caused by a vehicle collision. It is designed so that the engaged state is released before the fixed bracket 9 is detached from the vehicle body 101 due to, for example, breakage of the fixing portion 9a.

  Next, the assembly procedure of the electrical junction box 1 according to the present embodiment will be described. Note that the assembly procedure of the electrical junction box 1 is not limited to that described below, and it is only necessary that the electrical junction box 1 shown in FIG. 1 is configured after assembly. May be.

  First, the worker positions the bracket 9 on the front side of the lower cover 7. Next, the worker moves the bracket 9 along the outer bottom surface 7 b of the lower cover 7 by using the slide mechanism 13 in the state where the slide rail portions 71 and 72 are inserted into the guide hole portions 91 and 92, respectively. Slide backward from the back. Then, as shown in FIG. 5, the worker slides the bracket 9 until the engaged portion 73 moves over the engaging portion 93 and moves to the rear side in the traveling direction. The engaging portion 93 is engaged. As described above, the bracket 9 is attached to the lower cover 7.

  Subsequently, the worker inserts the routing material W into the internal space from the lower side of the frame 3 and fixes it to the frame 3. Next, the worker attaches the electronic component 2 to the frame 3 from the upper side of the frame 3 through the upper opening, and electrically connects the electronic component 2 and the routing material W. Next, the operator places the lower cover 7 on the lower side of the frame 3, inserts the lower cover 7 from the lower side of the frame 3, and inserts the routing material W through the insertion hole 30 with respect to the frame 3. The lower cover 7 is locked by the locking mechanism 51. Next, the worker places the upper cover 5 on the upper side of the frame 3 and assembles the upper cover 5 on the upper side of the frame 3 so that the upper cover 5 and the upper opening of the frame 3 face each other. The locking mechanism 31 is used for locking. Thus, the assembly of the electrical junction box 1 is completed.

  Next, the behavior when the electrical junction box 1 receives an impact due to a frontal collision of the vehicle will be described. The impact received by the electrical junction box 1 includes not only the kinetic energy of the electrical junction box 1 itself, but also impulses when other components located in front of the electrical junction box 1 collide with the electrical junction box 1. . When an external force directed toward the rear of the vehicle acts on the wall surface 4a of the housing 4 facing the front of the vehicle due to an impact caused by a frontal collision of the vehicle, the electrical junction box 1 tends to move from the front to the rear in the traveling direction. At this time, since the bracket 9 extending from the housing 4 is fixed to the vehicle body 101, the electrical connection box 1 is restricted from moving from the front to the rear, and the housing 4 and the bracket 9 are moved along the traveling direction. Try to keep them away from each other. The engaged portion 93 and the engaged portion 73 in the engaged state are such that the engaged surface 73a and the engaging surface 93a face each other in the advancing direction, and the separation between the housing 4 and the bracket 9 is restricted. However, when the external force reaches a certain level, they buckle and deform. As a result, the engaged portion 73 gets over the engaging portion 93, the engaged portion 73 is detached from the engaging portion 93, and the housing 4 moves from the front to the rear with respect to the bracket 9. At this time, the housing 4 is separated from the bracket 9 while being slid from the front to the rear by the slide mechanism 13. Thus, since the housing | casing 4 spaces apart from the bracket 9 by the impact by the front collision of a vehicle, the electrical connection box 1 can release the external force which acts on the electrical connection box 1, and reduces the failure | damage of the housing | casing 4. It becomes possible.

  As described above, the electrical junction box 1 according to the present embodiment is arranged such that one of the plurality of wall surfaces 4a erected in the circumferential direction faces the front of the vehicle, and at least one electronic component 2 Is provided between the housing 4 and the bracket 9, and the housing 4 is disposed between the housing 4 and the bracket 9. And an engagement mechanism 11 for engaging the bracket 9 from the front to the rear of the vehicle. The engaging mechanism 11 is configured such that when an external force acting toward the rear of the vehicle acts on the wall surface 4a of the housing 4 facing the front of the vehicle due to an impact caused by a collision of the vehicle, before the fixing portion 9a is detached from the vehicle body 101, The casing 4 is detached from the front of the vehicle with respect to the bracket 9.

  With the above configuration, the electrical junction box 1 according to the present embodiment can detach the housing 4 from the bracket 9 from the front to the rear of the vehicle, and the electrical junction box 1 together with other components at the time of a vehicle front collision. By moving from the front to the rear, it is possible to reduce breakage of the electrical junction box 1 due to the collision of other parts.

  In addition, the electrical junction box 1 according to the present embodiment includes a slide mechanism 13 that enables the engagement mechanism 11 to slide the housing 4 from the front of the vehicle to the rear with respect to the bracket 9, and a fixing portion 9 a of the bracket 9. And an engaging portion 93 that engages the bracket 9 with the housing 4, and an engaging portion 93 that is located on the outer bottom surface of the housing 4 (the outer bottom surface 7b of the lower cover 7). Engaging portion 73 engaged from the front to the rear. With such a configuration, the engagement mechanism 11 disengages the engaged portion 73 from the engagement portion 93 and the slide mechanism 13 slides the housing 4 from the front of the vehicle to the rear with respect to the bracket 9. When an external force directed toward the rear of the vehicle acts on the wall surface 4a of the housing 4 facing the front of the vehicle due to an impact due to the collision of the vehicle, before the fixed portion 9a is detached from the vehicle body 101, the bracket 9 is The housing 4 can be detached from the front of the vehicle to the rear.

  In addition, the wire harness WH according to the present embodiment includes an electrical junction box 1 and a conductive routing material W that is electrically connected to the electronic component 2. When the external force acting toward the rear of the vehicle acts on the wall surface 4a of the housing 4 facing the front of the vehicle due to the impact caused by the collision of the vehicle, the engagement mechanism 11 comes before the fixed portion 9a is detached from the vehicle body 101. The casing 4 is detached from the front of the vehicle with respect to the bracket 9. Thereby, at the time of a frontal collision of the vehicle, the electrical junction box 1 moves from the front to the rear together with other components, and damage to the electrical junction box 1 due to the collision of the other components can be reduced.

[Modification of Embodiment]
FIG. 6 is a perspective view illustrating a schematic configuration of an electrical junction box according to a modified example of the embodiment. In FIG. 6, a part of the electric wire and the wiring material is omitted with a two-dot chain line. FIG. 6 shows a state in which the bracket is engaged with the housing. FIG. 6 shows a chargeable fusible link with a two-dot chain line.

  An electrical junction box 1A according to a modification of the present embodiment is also referred to as a chargeable fusible link (hereinafter referred to as “ALT_FL”) used between a generator side such as an alternator of a vehicle and a power source side such as a battery. ) Is arranged near the center in the electrical junction box 1A, which is different from the electrical junction box 1 described above.

  ALT_FL21 has a high current value when energized, and is 120A to 180A for general gasoline vehicles, and 400A to 500A for hybrid vehicles and electric vehicles, for example. When such an ALT_FL 21 is arranged in front of the traveling direction of the vehicle in the electrical connection box 1A, when the vehicle collides forward and a strong impact is applied to the electrical connection box 1, the casing 4 is damaged and charged. The electrical circuit of the system may be short-circuited, causing damage to the vehicle and passengers.

  In the electrical junction box 1A, ALT_FL21 is arranged at the approximate center in the longitudinal direction of the housing 4 and at the approximate center in the short direction. In the electrical junction box 1A according to the modified example of the present embodiment, the ALT_FL 21 is disposed at a position that is not near the inside of the plurality of wall surfaces 4a that are erected in the circumferential direction of the casing 4, so that the vehicle collides with the casing Even if the wall surface 4a of 4 is broken, the electric circuit of the charging system is not short-circuited, and damage to the vehicle and the occupant can be reduced. The ALT_FL 21 is preferably arranged, for example, around the intersection of diagonal lines of the upper opening of the frame 3.

  In addition, in the said embodiment and the modification of embodiment, although the electrical connection box 1 demonstrated the case where the housing | casing 4 was being fixed to the vehicle body 101 by the bracket 9, the housing | casing 4 includes several attachments including the bracket 9 It may be fixed to the vehicle body 101 by a member. In this case, it is preferable that the engaged portion 73 is detached from the engaging portion 93 and the attachment member other than the bracket 9 is detached from the vehicle body 101 before the bracket 9 is detached from the vehicle body 101.

  Moreover, in the said embodiment and the modification of embodiment, although the cross section of the slide rail parts 71 and 72 is formed in L shape and / or reverse L shape, it is not limited to this.

  Moreover, in the said embodiment and the modification of embodiment, although the cross section seen from the longitudinal direction has the trapezoid shape and the reverse trapezoid shape, the engaging part 93 and the to-be-engaged part 73 are not limited to this. . That is, regarding the shape, material, and positional relationship of the engaging portion 93 and the engaged portion 73, the bracket 9 fixed to the vehicle body 101 is detached from the vehicle body 101 when an external force due to a vehicle collision is applied to the electrical junction box 1. It is preferable to be designed so that the engaged state is released prior to disengagement.

DESCRIPTION OF SYMBOLS 1 Electrical junction box 2 Electronic component 3 Frame 4 Case 4a Wall surface 7b Outer bottom surface 5 Upper cover 7 Lower cover 7a Lid-like member side wall surface 9 Bracket 9a Fixing part 9b Through-hole 11 Engagement mechanism 13 Slide mechanism 31, 51 Locking mechanism 71 , 72 Slide rail part 73 Engaged part 73a Engaged surface 73b, 93b Guide surface 91, 92 Guide hole part 93 Engagement part 93a Engagement surface 101 Car body 102 Stud bolt WH Wire harness W Arrangement material C Exterior material

Claims (3)

A casing that is disposed so that one of the plurality of wall surfaces provided in the circumferential direction faces the front of the vehicle, and that houses at least one electronic component in the internal space;
An attachment member having a fixing portion fixed to the vehicle body;
An engagement mechanism that is provided between the housing and the attachment member and engages the attachment member with respect to the housing from the front to the rear of the vehicle;
With
The engagement mechanism is
When an external force directed toward the rear of the vehicle acts on the wall surface of the housing facing the front of the vehicle due to an impact caused by the collision of the vehicle, the fixing member is applied to the mounting member before the fixing portion is detached from the vehicle body. In contrast, the housing is detached from the front of the vehicle to the rear,
An electrical junction box characterized by that. The engagement mechanism is
A slide mechanism that allows the housing to slide from the front of the vehicle to the rear of the mounting member;
An engaging portion that is located on a side opposite to the fixing portion of the mounting member and that engages the mounting member with the housing;
An engaged portion that is located on the outer bottom surface of the housing and that the engaging portion engages from the front to the rear of the vehicle;
With
When the external force acting toward the rear of the vehicle acts on the wall surface of the casing facing the front of the vehicle due to an impact caused by the collision of the vehicle, the engaged portion is detached from the engaging portion, and the slide Sliding the housing from the front of the vehicle to the rear with respect to the mounting member by a mechanism;
The electrical junction box according to claim 1. A housing that is arranged so that one of a plurality of wall surfaces erected in the circumferential direction faces the front of the vehicle, and that houses at least one electronic component in the internal space, and is fixed to the vehicle body of the vehicle And an engagement mechanism that is provided between the housing and the attachment member and that engages the attachment member from the front to the rear of the vehicle. An electrical junction box comprising:
A conductive routing material electrically connected to the electronic component;
With
The engagement mechanism is
When an external force directed toward the rear of the vehicle acts on the wall surface of the housing facing the front of the vehicle due to an impact caused by the collision of the vehicle, the fixing member is applied to the mounting member before the fixing portion is detached from the vehicle body. In contrast, the housing is detached from the front of the vehicle to the rear,
A wire harness characterized by that.

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