Electrical junction box and waterproof structure of electrical junction box

Abstract

To provide an electric connection box which is excellent in waterproofness, and a waterproof structure of an electric connection box.SOLUTION: An electric connection box 1 includes a first resin body 2 having a storage space capable of storing an electronic component therein, a second resin body 3 which is assembled on the first resin body 2 from the outside of the storage space, enables a wire 60 to be inserted therethrough by an outer peripheral wall 23 of the first resin body 2 and an inner wall 33 of the second resin body 3, and defines a wire insertion path S communicating the inside and the outside. The first resin body 2 has a first arm piece 24 extending into a wire insertion path S provided on the outer peripheral wall 23, and the second resin body 3 has a second arm piece 34 extending into the wire insertion path S provided on the inner wall 33. When the wire 60 is inserted into the wire insertion path S, the first arm piece 24 and the second arm piece 34 are positioned so as to sandwich the wire 60 and are structured so as to be pushed against the wire 60, when the wire 60 is not inserted into the wire insertion path S, the first arm piece 24 and the second arm piece 34 are structured so as to block the wire insertion path S and be abutted to each other.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an electrical junction box and a waterproof structure for the electrical junction box. [Background technology]

[0002] Conventionally, there have been proposed electric junction boxes that are mounted on vehicles and house various electronic components such as fuses, relays, and electronic control units in a housing space. For example, one conventional electric junction box includes a housing having a housing space, a stud bolt that is provided in the housing space inside the housing and is conductively connected to the electronic components, and a side cover that is attached to the housing at a location where the stud bolt is provided (see, for example, Patent Document 1). In the conventional electric junction box, a space through which an electric wire passes (hereinafter, referred to as an "electric wire insertion passage") is defined between the housing and the side cover. A terminal provided at one end of the electric wire passed through the electric wire insertion passage is fastened and fixed to the stud bolt. The other end of the electric wire is connected to, for example, a vehicle device, and power is supplied to the electronic components. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-186668 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, in the electrical junction box of Patent Document 1, the wire insertion passage communicates the inside and outside of the storage space in which electronic components and the like are stored. For this reason, for example, when a vehicle in which the box is mounted is subjected to high-pressure washing, there is a risk that high-pressure washing water will flow into the internal storage space (inside the electrical junction box) through the wire insertion passage. Even if an electric wire is passed through the wire insertion passage, there is a risk that water will flow into the internal storage space (inside the electrical junction box) through the gap between the inner wall of the wire insertion passage and the electric wire. Thus, from the viewpoint of waterproofing, conventional electrical junction boxes have room for improvement.

[0005] The present invention has been made in consideration of the above-mentioned circumstances, and an object of the present invention is to provide an electrical junction box with excellent waterproof properties, and a waterproof structure for an electrical junction box. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, an electric junction box and a waterproof structure for an electric junction box according to the present invention are characterized by the following [1] to [4]. [1] An electrical connection box including a first resin body having an internal storage space capable of storing an electronic component, and a second resin body attached to the first resin body from outside the storage space, an electric wire insertion passage is defined between an outer peripheral wall of the first resin body and an inner wall of the second resin body, the electric wire can be inserted therethrough, and the electric wire insertion passage communicates between the inside and the outside; The first resin body is a first arm piece extending into the wire insertion passage is provided on the outer circumferential wall, The second resin body is a second arm piece extending into the wire insertion passage is provided on the inner wall; The first arm piece and the second arm piece are When the electric wire is inserted into the electric wire insertion passage, the electric wire is sandwiched between the electric wire and pressed against the electric wire, When the electric wire is not inserted into the electric wire insertion passage, the contact members are configured to abut against each other so as to close the electric wire insertion passage. It is an electrical junction box. [2] In the electrical junction box according to the above [1], The first arm piece has a cantilever shape, The second arm piece has a cantilever shape, At least one of the first arm piece and the second arm piece is inclined with respect to a direction in which the electric wire is inserted. It is an electrical junction box. [3] In the electrical junction box according to the above [2], The first arm piece is The free end is inclined so as to approach the opening of the electric wire insertion passage on the outer side as the free end is away from the fixed end. It is an electrical junction box. [4] A waterproof structure of an electrical connection box comprising the electrical connection box according to any one of [1] to [3] above and an electric wire inserted into the electric wire insertion passage, The first arm piece and the second arm piece are When the electric wire is inserted into the electric wire insertion passage, the clamp is positioned to pinch the electric wire and is pressed against the electric wire, When the electric wire is not inserted into the electric wire insertion passage, the contact members abut against each other so as to close the electric wire insertion passage. The electrical junction box must be waterproof.

[0007] The electrical connection box having the configuration of [1] above will be described below. The electrical connection box of this configuration includes a first resin body having an internal storage space capable of storing electronic components, and a second resin body assembled to the first resin body from the outside of the storage space. When the second resin body is assembled to the first resin body, an electric wire can be inserted by the outer wall of the first resin body and the inner wall of the second resin body, and an electric wire insertion passage that communicates the inside and outside of the storage space is defined. When an electric wire is inserted into the electric wire insertion passage, the first arm piece provided on the outer wall of the first resin body and the second arm piece provided on the inner wall of the second resin body are positioned to sandwich the electric wire and are pressed against the electric wire. On the other hand, when an electric wire is not inserted into the electric wire insertion passage, the first arm piece and the second arm piece are configured to abut against each other to close the electric wire insertion passage. As a result, the electrical connection box of this configuration suppresses the inflow of liquid such as water into the inside of the storage space through the electric wire insertion passage. In other words, the electrical junction box of this configuration has superior waterproof properties compared to conventional electrical junction boxes.

[0008] The electrical junction box having the configuration of [2] above will be described below. The first arm piece and the second arm piece each have a cantilever shape. Therefore, the first arm piece and the second arm piece are more likely to elastically deform than when they do not have a cantilever shape. At least one of the first arm piece and the second arm piece is inclined relative to the direction in which the electric wire is inserted. As a result, even if liquid flows into the electric wire insertion passage of the electrical junction box of this configuration, the liquid flows out to the outside along the inclination of at least one of the first arm piece and the second arm piece. In other words, the electrical junction box of this configuration prevents water from entering the inside of the storage space.

[0009] The electrical junction box having the configuration [3] above will be described below. The first arm piece is inclined so that the further the free end is from the fixed end, the closer it is to the opening on the outside side of the electric wire insertion passage. As a result, even if liquid flows into the electric wire insertion passage of the electrical junction box of this configuration, the liquid flows out along the inclination of the first arm piece to the outside. In other words, the electrical junction box of this configuration prevents water from entering the inside of the storage space.

[0010] The waterproof structure of the configuration [4] above will be described below. The waterproof structure of this configuration includes the electric junction box described in any one of [1] to [3] above, and an electric wire inserted into the electric wire insertion passage. In the waterproof structure of this configuration, the first arm piece and the second arm piece are configured to be positioned so as to sandwich the electric wire and to be pressed against the electric wire when the electric wire is inserted into the electric wire insertion passage, and are configured to abut against each other so as to close the electric wire insertion passage when the electric wire is not inserted into the electric wire insertion passage. In other words, the waterproof structure of this configuration, like the above [1], uses the first arm piece and the second arm piece to prevent liquid such as water from flowing into the housing space through the electric wire insertion passage. Effect of the Invention

[0011] Thus, according to the present invention, it is possible to provide an electrical junction box having excellent waterproof properties, and a waterproof structure for the electrical junction box.

[0012] The present invention has been briefly described above. The details of the present invention will become clearer by reading the detailed description of the invention described below with reference to the accompanying drawings. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a perspective view of an electrical junction box according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an exploded perspective view of the electrical junction box shown in FIG. [Diagram 3] FIG. 3 is a top view of the frame and the lower cover. [Figure 4] FIG. 4(a) is a perspective view of the side cover as seen from the rear, and FIG. 4(b) is a side view of the side cover. [Diagram 5] 5(a) is a cross-sectional view taken along line AA in FIG. 1, and FIG. 5(b) is an enlarged view of part C in FIG. 5(a). [Figure 6] 6(a) is a cross-sectional view taken along line BB in FIG. 1, and FIG. 6(b) is an enlarged view of part D in FIG. 6(a). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] <Embodiment> Hereinafter, with reference to the drawings, an electric junction box 1 according to an embodiment of the present invention shown in Fig. 1 will be described. The electric junction box 1 is typically a relay box mounted on a vehicle and having an internal space for accommodating electronic components such as relays and other components R (see Figs. 2 and 3).

[0015] For ease of explanation, "front," "rear," "left," "right," "upper," and "lower" are defined below as shown in FIG. 1. The "front-rear direction," "left-right direction," and "upper direction" are mutually perpendicular. When the electrical junction box 1 is mounted on a vehicle, the "front-rear direction," "left-right direction," and "upper direction" correspond to the front-rear direction, left-right direction, and upper-lower direction of the vehicle, respectively. In addition, the side of the electrical junction box 1 that faces the inside is referred to as the "inner" side, and the side of the electrical junction box 1 that faces the outside is referred to as the "outer" side.

[0016] 1 and 2, the electrical junction box 1 is composed of a frame 2, a side cover 3 attached to the peripheral wall of the frame 2, a lower cover 4 attached to the lower side of the frame 2 so as to close the lower opening of the frame 2, and an upper cover 5 attached to the upper side of the frame 2 so as to close the upper opening of the frame 2. All of the above four parts constituting the electrical junction box 1 are resin molded bodies.

[0017] In the electric junction box 1, as shown in FIG. 1, an electric wire (not shown) conductively connected to a part of the component R located inside the electric junction box 1 is led out to the outside of the electric junction box 1 through an electric wire outlet hole 6 provided in the front right part of the electric junction box 1. Furthermore, an electric wire (not shown) conductively connected to another part of the component R is led out to the outside of the electric junction box 1 through an electric wire outlet hole 7 provided in the center right part of the electric junction box 1. Furthermore, an electric wire (not shown) conductively connected to another part of the component R is led out to the outside of the electric junction box 1 through an electric wire outlet hole 8 provided in the rear right part of the electric junction box 1. Furthermore, an electric wire (not shown) conductively connected to another part of the component R is led out to the outside of the electric junction box 1 through an electric wire outlet hole 9 (see FIG. 2 and FIG. 5 to FIG. 6) provided in the rear left part of the electric junction box 1.

[0018] In addition, a terminal-attached electric wire 60, which is electrically connected via a stud bolt 65 to a bus bar (not shown) assembled to a holding portion 12 inside the electric junction box 1, is led out to the outside of the electric junction box through an electric wire insertion passage S. The terminal-attached electric wire 60 has an electric wire portion 61 and a terminal portion 62 connected to one end of the electric wire portion 61. The frame 2, side cover 3, lower cover 4, and upper cover 5 that constitute the electric junction box 1 will be described below in order.

[0019] First, the frame 2 will be described. As shown in Figs. 1 to 3, the frame 2 has a side wall 11 having a generally rectangular tubular shape extending in the vertical direction. The side wall 11 constitutes most of the external appearance of the side of the electrical junction box 1. As shown in Figs. 2 and 3, a flat holding portion 12 is provided on the side wall 11 so as to extend in a direction perpendicular to the vertical direction and divide the internal space of the side wall 11 into upper and lower halves. The holding portion 12 holds multiple types of multiple parts R so as to be aligned along the extension direction of the holding portion 12.

[0020] The side wall 11 has a lower end portion, and the outer surface of the side wall 11 is provided with a plurality of engaging portions 14 (eight portions in this example) integrally therewith, each of which includes a through hole extending in the up-down direction (see FIGS. 1 to 3). The engaging portions 14 serve to assemble the lower cover 4 to the frame 2.

[0021] The side wall 11 has an upper end portion, and the outer surface of the side wall 11 is provided with a plurality of latched portions 13 (three portions in this example) integrally therewith in the circumferential direction (see FIGS. 1 to 3). The latched portions 13 serve to attach the upper cover 5 to the frame 2.

[0022] A semi-cylindrical trough 15 that opens downward is provided at a location on the side wall 11 corresponding to the electric wire withdrawal hole 6 (see FIG. 1) so as to extend obliquely in a lower right direction (see FIG. 2). The trough 15 functions to form the upper part of the inner wall that defines the electric wire withdrawal hole 6.

[0023] A semi-cylindrical gutter 16 that opens downward is provided so as to extend to the right (see FIG. 2) at a location on the side wall 11 corresponding to the electric wire withdrawal hole 7 (see FIG. 1). The gutter 16 functions to form the upper part of the inner wall that defines the electric wire withdrawal hole 7. Furthermore, a semi-cylindrical gutter 17 that opens downward is provided so as to extend to the right (see FIG. 2) at a location on the side wall 11 corresponding to the electric wire withdrawal hole 8 (see FIG. 1). The gutter 17 functions to form the upper part of the inner wall that defines the electric wire withdrawal hole 8.

[0024] A semi-cylindrical trough 18 that opens downward is provided at a location on the side wall 11 corresponding to the electric wire withdrawal hole 9 (see Figs. 2 and 5 to 6) so as to extend obliquely in a lower left direction (see Figs. 5 to 6). The trough 18 functions to form the upper part of the inner wall that defines the electric wire withdrawal hole 9.

[0025] Stay portions 19 extending downward are integrally provided on the outer surface of the lower end portion of the side wall portion 11 at multiple locations (four locations in this example) in the circumferential direction, respectively (see Figs. 1 to 3). The stay portions 19 have the function of fixing the frame 2 (i.e., the electrical junction box 1) to a mounting location on the vehicle by assembling their tips to the mounting location on the vehicle.

[0026] 2 and 3, a mounting portion 20 to which the side cover 3 is to be attached is provided at a front right corner of the side wall portion 11. A plurality of stud bolts 65 (three in this example) are provided on the mounting portion 20 so as to protrude from an upper end surface 21 (see FIGS. 2 to 4). Specifically, the plurality of stud bolts 65 are located at a front right corner of the holding portion 12 (see FIGS. 2 to 4).

[0027] Furthermore, a contact portion 22 is provided on an upper end surface 21 of the mounting portion 20, and is electrically connected to a bus bar to be mounted to the holding portion 12. When a terminal portion 62 of a terminal-attached electric wire 60 (described later) is placed on the contact portion 22, the contact portion 22 and the terminal portion 62 are fastened and fixed by a stud bolt 65 and a nut 66 and are electrically connected (see FIG. 6).

[0028] A plurality of grooves 23 (three in this example) recessed inward and extending in the vertical direction are arranged side by side in the left-right direction on the outer peripheral wall of the mounting portion 20. The grooves 23 function to form the rear portion of the inner wall that defines the electric wire insertion passage S.

[0029] A plurality of arm pieces 24 (three in this example) having a plate-like shape are provided on the bottom wall of the groove portion 23. The arm pieces 24 are provided to correspond to the plurality of groove portions 23, respectively (i.e., one arm piece 24 is provided for one groove portion 23). The arm pieces 24 have an elastically deformable cantilever shape, and extend so that the free end approaches the opening (i.e., the lower opening) of the electric wire insertion passage S as it moves away from the fixed end, and are inclined so as to be inclined in the up-down direction (see Figs. 2 and 3). In other words, the free end of the arm piece 24 is located forward and below the fixed end. A locking piece 25 is provided on each of both ends in the left-right direction of the mounting portion 20. The locking piece 25 has a function of mounting the side cover 3 to the frame 2 (specifically, the mounting portion 20).

[0030] Next, the side cover 3 will be described. As shown in Fig. 4, the side cover 3 integrally comprises a main body 31 that constitutes part of the exterior of the front side surface of the electrical junction box 1, and an upper wall 32 that extends rearward from the upper end of the main body 31. The side cover 3 also integrally comprises an upper edge 36 that constitutes part of the annular upper edge of the side wall 11 of the frame 2 (see Figs. 4(b) to 6).

[0031] The rear wall (i.e., the inner wall) of the main body 31 is provided with a plurality of grooves 33 (three in this example) arranged side by side in the left-right direction, the grooves 33 being recessed forward and extending in the up-down direction. The grooves 33 function to form the rear portion of the inner wall that defines the electric wire insertion passage S.

[0032] A plurality of arm pieces 34 (three in this example) having a plate-like shape are provided on the bottom wall of the groove portion 33. The arm pieces 34 are provided to correspond to the plurality of groove portions 33, respectively (i.e., one arm piece 34 is provided for one groove portion 33). The arm pieces 34 have an elastically deformable cantilever shape, and extend so that the free end approaches the opening on the inner side of the electric wire insertion passage S (i.e., the upper opening) as it moves away from the fixed end, and are inclined so as to be inclined in the up-down direction. In other words, the free end of the arm piece 34 is located rearward and above the fixed end.

[0033] The upper wall portion 32 has a concave shape with a lower surface that is recessed upward and extends in the left-right direction. When the side cover 3 is completely attached to the frame 2, the upper wall portion 32 covers the upper end surface 21 of the mounting portion 20, including the multiple stud bolts 65 and the fastening portions between the contact portions 22 of the mounting portion 20 and the terminal portions 62 of the terminal-equipped electric wires 60, so as to accommodate the concave portions (see FIGS. 5 and 6).

[0034] A locking portion 35 including a through hole extending in the vertical direction is integrally provided on the outer surfaces of both left and right ends of the side cover 3 (specifically, the right side surface of the main body portion 31 and the left side surface of the upper wall portion 32) corresponding to the locking piece 25 of the frame 2.

[0035] Next, the lower cover 4 will be described. As shown in Fig. 2, the lower cover 4 is integrally provided with an annular side wall portion 41 that constitutes most of the appearance of the lower side surface of the electrical junction box 1, and a bottom wall portion 42 that closes an annular lower end opening of the side wall portion 41 and constitutes most of the appearance of the bottom surface of the electrical junction box 1. The annular upper edge portion of the side wall portion 41 has a shape that corresponds to the annular lower edge portion of the side wall portion 11 of the frame 2, and is capable of fitting with the annular lower edge portion of the side wall portion 11.

[0036] On the outer surface of the upper end portion of the side wall portion 41 at multiple circumferential locations (eight locations in this example), upwardly extending locking pieces 43 are integrally formed, each of which corresponds to a multiple number of lockable portions 14 of the frame 2 (see Figure 2).

[0037] A semi-cylindrical trough 44 that opens upward is provided at a location on the side wall 41 corresponding to the electric wire withdrawal hole 6 (see FIG. 1) so as to extend obliquely in a lower right direction (see FIG. 2). The trough 44 functions to form the rear portion of the inner wall that defines the electric wire withdrawal hole 6.

[0038] At a location of the side wall portion 41 corresponding to the electric wire withdrawal hole 7 (see FIG. 1), a semi-cylindrical gutter portion 45 opening upward is provided so as to extend to the right (see FIG. 2). The gutter portion 45 functions to form the lower part of the inner wall that defines the electric wire withdrawal hole 7. Furthermore, at a location of the side wall portion 41 corresponding to the electric wire withdrawal hole 8 (see FIG. 1), a semi-cylindrical gutter portion 46 opening upward is provided so as to extend to the right (see FIG. 2). The gutter portion 46 functions to form the lower part of the inner wall that defines the electric wire withdrawal hole 8.

[0039] A semi-cylindrical trough 47 that opens upward is provided at a location on the side wall 41 corresponding to the electric wire withdrawal hole 9 (see Figs. 2 and 5 to 6) so as to extend obliquely in a lower left direction (see Fig. 2). The trough 47 functions to form the lower part of the inner wall that defines the electric wire withdrawal hole 9.

[0040] Next, the upper cover 5 will be described. As shown in Fig. 2, the upper cover 5 is integrally provided with an annular side wall portion 51 that constitutes most of the appearance of the upper side surface of the electrical junction box 1, and an upper wall portion 52 that closes the annular upper end opening of the side wall portion 51 and constitutes most of the appearance of the upper surface of the electrical junction box 1. The annular lower edge portion of the side wall portion 51 has a shape that corresponds to the annular upper edge portion of the side wall portion 11 of the frame 2, and is capable of fitting with the annular upper edge portion of the side wall portion 11.

[0041] The side wall portion 51 has an outer surface provided with locking portions 53 integrally therewith at a plurality of locations (three locations in this example) in the circumferential direction, the locking portions 53 corresponding to the plurality of locked portions 13 of the frame 2, respectively.

[0042] The frame 2, the side cover 3, the lower cover 4, and the upper cover 5 that constitute the electrical junction box 1 have been described above.

[0043] In order to assemble the electrical junction box 1 which is made up of the frame 2, the side cover 3, the lower cover 4, and the upper cover 5, it is necessary to assemble the side cover 3, the lower cover 4, and the upper cover 5 to the frame 2.

[0044] To attach the side cover 3 to the frame 2, the locking pieces 25 of the frame 2 are inserted from the front and above into the through holes of the locked portions 35 (see FIG. 4) of the side cover 3, and the locking pieces 25 are locked to the locked portions 35. This completes the attachment of the side cover 3 to the frame 2 (see FIG. 1).

[0045] Similarly, to assemble the lower cover 4 to the frame 2, first, the multiple locking pieces 43 (see FIG. 2) of the lower cover 4 are inserted from below into the multiple through holes of the locked portion 14 (see FIG. 2) of the frame 2, and from this state, the annular upper edge portion of the side wall portion 41 of the lower cover 4 is fitted into the annular lower edge portion of the side wall portion 11 of the frame 2, and the multiple locking pieces 43 are locked to the multiple locked portions 13. This completes the assembly of the lower cover 4 to the frame 2 (see FIG. 1).

[0046] Similarly, to assemble the upper cover 5 to the frame 2, the annular lower edge portion of the side wall portion 51 of the upper cover 5 is fitted into the annular upper edge portion of the side wall portion 11 of the frame 2, and the multiple locking portions 53 of the upper cover 5 are locked to the multiple locked portions 13 of the frame 2. This completes the assembly of the upper cover 5 to the frame 2 (see FIG. 1).

[0047] When the assembly of the electrical junction box 1 is completed, the engagement between the multiple locking pieces 25 and the multiple locked portions 35 prevents the side cover 3 from being separated forward from the frame 2. Similarly, the engagement between the multiple locking pieces 43 and the multiple locked portions 14 prevents the lower cover 4 from being separated downward from the frame 2. Similarly, the engagement between the multiple locking portions 53 and the multiple locked portions 13 prevents the upper cover 5 from being separated upward from the frame 2.

[0048] Further, the groove 23 provided in the outer peripheral wall of the mounting portion 20 of the frame 2 and the groove 33 provided in the inner wall of the side cover 3 (see FIG. 2) define an electric wire insertion passage S through which the terminal-attached electric wire 60 is inserted (see FIG. 1). Similarly, the gutter-shaped portion 15 of the frame 2 and the gutter-shaped portion 44 of the lower cover 4 (see FIG. 2) define an electric wire outlet hole 6 through which the electric wire (not shown) is inserted (see FIG. 1). Similarly, the gutter-shaped portion 16 of the frame 2 and the gutter-shaped portion 45 of the lower cover 4 (see FIG. 2) define an electric wire outlet hole 7 through which the electric wire (not shown) is inserted (see FIG. 1). Similarly, the gutter-shaped portion 17 of the frame 2 and the gutter-shaped portion 46 of the lower cover 4 (see FIG. 2) define an electric wire outlet hole 8 through which the electric wire (not shown) is inserted (see FIG. 1). Similarly, the gutter-shaped portion 18 of the frame 2 and the gutter-shaped portion 47 of the lower cover 4 (see FIG. 2) define an electric wire withdrawal hole 9 (see FIG. 3) through which an electric wire (not shown) is inserted.

[0049] Hereinafter, a waterproof structure of an electric junction box 1 according to an embodiment of the present invention will be described. As shown in Fig. 1 and Fig. 2, a plurality of electric wire insertion passages S (three in this example) are defined in the electric junction box 1, and electric wires with terminals 60 are inserted through the other electric wire insertion passages S except for the rightmost electric wire insertion passage S.

[0050] Here, the process of inserting the terminal-attached electric wire 60 into the electric wire insertion passage S (specifically, electrically connecting the contact portion 22 and the terminal portion 62) will be described. First, the upper cover 5 is removed from the frame 2, and the side cover 3 is further removed from the frame 2. Then, the stud bolt 65 is inserted into the terminal portion 62 of the terminal-attached electric wire 60, and the upper surface of the contact portion 22 and the lower surface of the terminal portion 62 are brought into contact with each other. After that, the nut 66 is inserted into the stud bolt 65, and the contact portion 22 and the terminal portion 62 are fastened and fixed. As a result, the terminal-attached electric wire 60 is electrically connected to the component R held by the holding portion 12 via the contact portion 22 and the bus bar. In this way, power is supplied to the component R. Note that an end of the terminal-attached electric wire 60 other than the end fastened and fixed to the contact portion 22 is connected to a device (not shown) that supplies power to the component R.

[0051] After the terminal portion 62 of the terminal-attached electric wire 60 is fastened and fixed to the contact portion 22 of the mounting portion 20, the side cover 3 is assembled to the frame 2. Then, the upper cover 5 is assembled to the frame 2. In this manner, the terminal-attached electric wire 60 is inserted into the electric wire insertion passage S.

[0052] Fig. 5 is a diagram showing the waterproof structure of the electric junction box 1 when the terminal-attached electric wire 60 is not inserted into the electric wire insertion passage S. Fig. 6 is a diagram showing the waterproof structure of the electric junction box 1 when the terminal-attached electric wire 60 is inserted into the electric wire insertion passage S.

[0053] First, the waterproof structure of the electric junction box 1 when the terminal-attached electric wire 60 is not inserted in the electric wire insertion passage S will be described. In particular, as shown in FIG. 5(b), when the terminal-attached electric wire 60 is not inserted in the electric wire insertion passage S, the arm piece 24 of the frame 2 and the arm piece 34 of the side cover 3 are in contact with each other so as to block the electric wire insertion passage S. At this time, the arm piece 24 and the arm piece 34 may be in contact with each other so as to press against each other, or may be in contact without pressing against each other. In other words, the arm piece 24 and the arm piece 34 may be in an elastically deformed state having a restoring force in the contact state, or may be in a natural state having no restoring force. In this way, the electric junction box 1 suppresses the inflow of water into the inside of the electric junction box 1 by the arm piece 24 and the arm piece 34 being in contact with each other.

[0054] Next, the waterproof structure of the electric junction box 1 when the terminal-attached electric wire 60 is inserted through the electric wire insertion passage S will be described. As shown in Fig. 6(b) in particular, when the terminal-attached electric wire 60 is inserted through the electric wire insertion passage S, the arm piece 24 of the frame 2 and the arm piece 34 of the side cover 3 are positioned so as to sandwich the terminal-attached electric wire 60 in the front-rear direction. At this time, the terminal-attached electric wire 60 presses the arm piece 24 backward and presses the arm piece 34 forward. In other words, the arm piece 24 has a restoring force toward the front, and the arm piece 34 has a restoring force toward the rear.

[0055] In other words, the arm pieces 24 and 34 sandwich the terminal-attached electric wire 60 in the front-rear direction so as to close the gap between the electric wire insertion passage S and the terminal-attached electric wire 60 inserted into the electric wire insertion passage S. In this manner, the arm pieces 24 and 34 are positioned so as to sandwich the terminal-attached electric wire 60 and are both pressed against the terminal-attached electric wire 60, thereby preventing water from flowing into the electric junction box 1 through the gap between the electric wire insertion passage S and the terminal-attached electric wire 60.

[0056] <Actions and Effects> The electric junction box 1 according to this embodiment is configured so that, when the terminal-attached electric wire 60 is inserted through the electric wire insertion passage S, the arm piece 24 of the frame 2 and the arm piece 34 of the side cover 3 are positioned to sandwich the terminal-attached electric wire 60 and are pressed against the terminal-attached electric wire 60. Furthermore, when the terminal-attached electric wire 60 is not inserted through the electric wire insertion passage S, the arm piece 24 and the arm piece 34 are configured to abut against each other to block the electric wire insertion passage S. As a result, the electric junction box 1 according to this embodiment prevents liquids such as water from flowing into the electric junction box 1 via the electric wire insertion passage S.

[0057] Furthermore, in the electric junction box 1 according to this embodiment, the arm piece 24 of the frame 2 and the arm piece 34 of the side cover 3 each have a cantilever shape. Therefore, the arm piece 24 and the arm piece 34 are more likely to be elastically deformed than when they do not have a cantilever shape. The arm pieces 24 and 34 are inclined relative to the direction in which the electric wire is inserted (in this example, the up-down direction). As a result, even if liquid flows into the electric wire insertion passage S of the electric junction box 1, the liquid flows out of the electric junction box 1 (specifically, the electric wire insertion passage S) along the inclination of the arm piece 24 and the arm piece 34. In other words, the electric junction box 1 according to this embodiment suppresses the flow of liquid into the electric junction box 1 via the electric wire insertion passage S.

[0058] Furthermore, in the electrical junction box 1 according to this embodiment, the arm piece 24 of the frame 2 is inclined so that the further the free end is from the fixed end, the closer it is to the opening on the exterior side of the electric wire insertion passage S. As a result, even if liquid flows into the electric wire insertion passage S, the liquid flows out to the exterior along the inclination of the arm piece 24. In other words, the electrical junction box 1 according to this embodiment prevents liquid from flowing into the interior of the electrical junction box 1 via the electric wire insertion passage S.

[0059] As a further advantage, the electrical junction box 1 having the above-described configuration can accommodate various electric wires having different outer diameters because the arm pieces 24 and 34 are configured to be elastically deformable.

[0060] In this way, the electrical junction box 1 according to this embodiment is superior in waterproofness to the conventional electrical junction box. The waterproof structure also provides the same functions and effects as those described above.

[0061] <Other forms> The present invention is not limited to the above-described embodiment, and can be appropriately modified, improved, etc. In addition, the material, shape, size, number, arrangement location, etc. of each component in the above-described embodiment are arbitrary as long as the present invention can be achieved, and are not limited.

[0062] Although the arm piece 24 and the arm piece 34 of the electric junction box 1 according to the present embodiment have a cantilever shape, the present invention is not limited to this as long as the inflow of water into the electric junction box 1 is suppressed. For example, the arm piece 24 and the arm piece 34 may have a double-supported beam shape.

[0063] Here, the features of the above-described embodiments of the electrical junction box according to the present invention will be briefly summarized and listed in the following [1] to [4]. [1] An electric connection box (1) including a first resin body (frame 2) having an internal storage space capable of storing electronic components, and a second resin body (side cover 3) attached to the first resin body from outside the storage space, an electric wire (terminal-attached electric wire 60) can be inserted between an outer peripheral wall (groove portion 23) of the first resin body (frame 2) and an inner wall (groove portion 33) of the second resin body (side cover 3), and an electric wire insertion passage (S) that communicates between the inside and the outside is defined; The first resin body (frame 2) is A first arm piece (24) extending into the electric wire insertion passage (S) is provided on the outer peripheral wall (groove portion 23), The second resin body (side cover 3) is A second arm piece (34) extending into the electric wire insertion passage (S) is provided on the inner wall (groove portion 33), The first arm piece (24) and the second arm piece (34) When the electric wire (electric wire with terminal 60) is inserted into the electric wire insertion passage (S), the electric wire (electric wire with terminal 60) is positioned to be sandwiched therebetween and pressed against the electric wire (electric wire with terminal 60), When the electric wire (terminal-attached electric wire 60) is not inserted into the electric wire insertion passage (S), the electric wires abut against each other so as to close the electric wire insertion passage (S). Electrical junction box(1). [2] In the electrical connection box (1) described in [1] above, The first arm piece (24) has a cantilever shape, The second arm piece (34) has a cantilever shape, At least one of the first arm piece (24) and the second arm piece (34) is inclined so as to be inclined with respect to the direction in which the electric wire (terminal-attached electric wire 60) is inserted. Electrical junction box(1). [3] In the electrical connection box (1) described in [2] above, The first arm piece (24) is The free end is inclined so as to approach the opening of the electric wire insertion passage (S) on the outer side as the free end is away from the fixed end. Electrical junction box(1). [4] A waterproof structure of an electric connection box including the electric connection box (1) according to any one of the above [1] to [3] and an electric wire (terminal-equipped electric wire 60) inserted into the electric wire insertion passage (S), The first arm piece (24) and the second arm piece (34) When the electric wire (electric wire with terminal 60) is inserted into the electric wire insertion passage (S), the insertion member (10) is positioned to pinch the electric wire (electric wire with terminal 60) and is pressed against the electric wire (electric wire with terminal 60), When the electric wire (terminal-attached electric wire 60) is not inserted into the electric wire insertion passage (S), the terminals are configured to abut against each other so as to close the electric wire insertion passage (S). Waterproof construction of electrical junction box. [Explanation of symbols]

[0064] 1 Electrical junction box 2 Frame (first resin body) 3 Side cover (second resin body) 4 Lower cover 5 Upper cover 6,7,8,9 Wire extraction hole 11,41,51 Side wall 12 Holding part 13,14,35 Locked part 15,16,17,18,44,45,46,47 Gutter-shaped part 19 Stay part 20 Part to be assembled 21 Upper end surface 22 Contact part 23 Groove (outer peripheral wall) 24 Arm piece (first arm piece) 25,43 Locking piece 31 Main body 32,52 Upper wall 33 Groove (inner wall) 34 Arm piece (second arm piece) 36 Top edge 42 Bottom wall 53 Locking part 60 Electric wire with terminal (electric wire) 61 Wire Section 62 Terminal section 65 Stud bolt 66 Nut R Parts S Wire insertion passage

Claims

1. An electrical connection box including a first resin body having an internal storage space capable of storing an electronic component, and a second resin body attached to the first resin body from outside the storage space, an electric wire insertion passage is defined between an outer peripheral wall of the first resin body and an inner wall of the second resin body, the electric wire can be inserted therethrough, and the electric wire insertion passage communicates between the inside and the outside; The first resin body is a first arm piece extending into the wire insertion passage is provided on the outer circumferential wall, The second resin body is a second arm piece extending into the wire insertion passage is provided on the inner wall; The first arm piece and the second arm piece are When the electric wire is inserted into the electric wire insertion passage, the electric wire is sandwiched between the electric wire and pressed against the electric wire, When the electric wire is not inserted into the electric wire insertion passage, the contact members are configured to abut against each other so as to close the electric wire insertion passage. Electrical junction box.

2. 2. The electrical junction box according to claim 1, The first arm piece has a cantilever shape, The second arm piece has a cantilever shape, At least one of the first arm piece and the second arm piece is inclined with respect to a direction in which the electric wire is inserted. Electrical junction box.

3. The electrical junction box according to claim 2, The first arm piece is The free end is inclined so as to approach the opening of the electric wire insertion passage on the outer side as the free end is away from the fixed end. Electrical junction box.

4. A waterproof structure for an electric junction box comprising: the electric junction box according to any one of claims 1 to 3; and an electric wire inserted into the electric wire insertion passage, The first arm piece and the second arm piece are When the electric wire is inserted into the electric wire insertion passage, the clamp is positioned to pinch the electric wire and is pressed against the electric wire, When the electric wire is not inserted into the electric wire insertion passage, the contact members abut against each other so as to close the electric wire insertion passage. Waterproof construction of electrical junction box.

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