JP2013074681A - Electric connection box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize operation force necessary for assembling operation for a harness insertion hole and to advantageously secure waterproofness of an opening part of the harness insertion hole even if a wire harness inserted into the harness insertion hole has variance in external diameter.SOLUTION: While a harness insertion hole 82 formed between combination surfaces of a first wall part 20c and a second wall part 44 constituting a case 16 is formed by connecting a first cut part 58 provided to the first wall part 20c and a second cut part 78 provided to the second wall part 44, an inclined guide part 64 which projects from a peripheral edge part of the first cut part 58 to outside the case 16 while inclined to the side of a center axis C of the hardness insertion hole 82 is projected from the first wall part 20c.

Description

  The present invention relates to an electrical connection box mounted on an automobile or the like, and relates to an electrical connection box having a harness insertion hole through which a wire harness accommodated in a case is inserted.

  Conventionally, a wire harness in which a large number of electric wires connected to electrical components and current-carrying members are bundled is housed inside the electrical junction box, and is passed through a harness insertion hole penetrating the wall of the electrical junction box. It is drawn out to the outside.

  By the way, in such an electrical junction box, in order to improve workability at the time of assembling the electrical junction box, the harness insertion hole is often divided. For example, Japanese Patent Laid-Open No. 2001-218338 (Patent Document 1) discloses a peripheral wall portion (first wall portion) of a lower case constituting an outer wall of a case, and a slide cover (second wall) assembled to an opening window of the peripheral wall portion. A semicircular arc-shaped notch provided at each end edge, and a semicircular arc-shaped projecting piece projecting straight from the notch toward the outside of the peripheral wall portion. The structure which provided the cylindrical harness penetration hole which penetrates the outer wall of a case in combination is shown. If it does in this way, after pulling out a wire harness from the surrounding wall part of a lower case outside, what is necessary is just to mount a slide cover and to constitute a harness insertion hole, and it becomes easy to pull out the wire harness from the inside of the case to the outside. At the same time, by combining the semicircular arc-shaped cylindrical body with the wire harness interposed therebetween, the waterproofness of the harness insertion hole can be achieved.

  However, in the conventional structure described in Patent Document 1, since the inner diameter of the harness insertion hole formed by combining the semicircular arc-shaped notch portion and the protruding piece protruding therefrom is constant, the dimension crossing of the wire harness that can be absorbed Was very small. On the other hand, the wire harness that is inserted into the harness insertion hole has a structure in which a large number of electric wires are bundled and fixed from the outside with an extrapolation tube, vinyl tape, or the like. In the conventional structure as disclosed in Patent Document 1, variations in the outer diameter of the wire harness may not be sufficiently absorbed.

  In other words, since the inner diameter of the harness insertion hole is constant, when the outer diameter of the wire harness is the maximum value of the dimensional tolerance, the pushing force required for assembling the slide cover to the lower case increases, and the assembly work takes time. In some cases, assembly work may be difficult. In addition, when the outer diameter of the wire harness is the minimum value of the dimensional tolerance, it is inevitable that a large gap is generated over the entire circumference of the harness insertion hole, and it is difficult to ensure the waterproofness of the harness insertion hole. There was a case.

JP 2001-218338 A

  The present invention has been made in the background of the above-mentioned circumstances, and the problem to be solved is an operation force required for the assembly work even when the outer diameter dimension of the wire harness inserted through the harness insertion hole varies. With a new structure with a harness insertion hole that can absorb large dimensional crossings more advantageously than before. It is to provide an electrical junction box.

  In the first aspect of the present invention, a cylindrical harness insertion hole penetrating the case is formed between the first wall portion and the second wall portion constituting the case by being combined with each other, In the electrical junction box in which the wire harness housed inside the case is drawn out from the harness insertion hole, the harness insertion hole is provided with the first notch provided in the first wall portion. And the second cutout portion provided in the second wall portion is configured to be connected, while the first wall portion is inclined toward the central axis side of the harness insertion hole, An inclined guide portion that protrudes outward from the peripheral edge portion of the first notch portion is provided.

  In the electrical junction box according to the present invention, from the peripheral portion of the first notch that defines the harness insertion hole, toward the outside of the case while being inclined toward the central axis of the harness insertion hole. A protruding inclined guide portion is provided. As a result, even when there is variation in the dimensions of the wire harness that is inserted through the harness insertion hole, it is advantageous that the operating force required for assembly changes greatly or the waterproofness of the opening of the harness insertion hole is greatly deteriorated. Therefore, it is possible to advantageously absorb a dimensional error in the outer diameter of the wire harness that is larger than the conventional one.

  Specifically, when the diameter of the wire harness is relatively small, by pulling out the wire harness from the harness insertion hole so as to extend substantially in the axial direction of the harness insertion hole, the waterproof property of the opening of the harness insertion hole Can be secured. That is, the diameter of the opening portion of the harness insertion hole defined by the protruding edge portion of the inclined guide portion and the second notch portion is determined so that the wire insertion is performed when the wire harness extends and is accommodated in the axial direction of the harness insertion hole. It can be considered in a direction orthogonal to the axial direction of the hole, and it is possible to avoid a large gap at the opening of the harness insertion hole. In addition, since the diameter of the wire harness is small, the wire harness does not come into contact with the first wall and the second wall when it is assembled, and can be easily assembled without requiring a large operating force. .

  On the other hand, when the diameter of the wire harness is larger than the diameter of the opening of the harness insertion hole considered in the axial direction of the harness insertion hole, the wire harness is bent along the inclined guide portion to By pulling out from the harness insertion hole so as to extend with an inclination with respect to the direction, the first wall portion and the second wall portion can be assembled without increasing the operating force required for the assembly. That is, when the wire harness is withdrawn from the harness insertion hole in a state where the wire harness is inclined along the inclined guide portion inclined inward in the axial direction of the harness insertion hole, the protruding edge portion of the inclined guide portion and the second notch portion The diameter of the opening portion of the harness insertion hole configured by the above can be considered in a direction inclined with respect to the central axis of the harness insertion hole, and becomes wider than when considered in the orthogonal direction. Therefore, the contact which becomes resistance to assembling the first wall part and the second wall part is avoided by inclining the wire harness along the inclined guide part, and the assembling is possible without excessively increasing the operation force. It becomes. Furthermore, since the wire harness is inclined along the inclined guide portion, a gap is prevented from being generated in the opening portion of the harness insertion hole, and the waterproofness of the opening portion is also ensured.

  The first wall portion and the second wall portion may be any case as long as they constitute the case of the electrical junction box, that is, the outer wall. For example, the peripheral wall portion and the peripheral wall portion of the case as described in Patent Document 1 It may be comprised from the slide cover assembled | attached to this opening window, and may be comprised by each surrounding wall part of one case and the other case mutually combined. Moreover, you may be comprised by the wall part of a case, and the cover part assembled | attached to this wall part via a hinge.

  According to a second aspect of the present invention, in the first aspect, in the axial section of the harness insertion hole, the inner peripheral surface of the inclined guide portion is a curved surface that protrudes outward. It is what.

  According to the electrical junction box structured according to this aspect, the inner peripheral surface of the inclined guide portion is a curved surface, so that the pressing force when the first wall portion and the second wall portion are assembled to each other is as follows: The wire harness can be bent more smoothly along the inclined guide portion, and an increase in assembly operation force due to an increase in the diameter of the wire harness can be prevented more advantageously.

  According to a third aspect of the present invention, in the first or second aspect, the second cutout portion of the second wall portion protrudes toward the first notch portion. The part is provided.

  According to this aspect, for example, the protrusion can be pressed against the outer surface of the wire harness to be inserted, or can be prevented from entering the opening of the harness insertion hole by entering the irregularities on the outer surface.

  According to the present invention, with respect to the harness insertion hole configured by combining the first notch and the second notch provided in the first wall and the second wall constituting the case of the electrical junction box, An inclined guide portion that protrudes outward from the outer wall of the case while being inclined toward the central axis side of the harness insertion hole from the peripheral edge portion of the first notch portion is provided. Thereby, while changing the extension angle of the wire harness inserted through the harness insertion hole using the inclined guide portion, the diameter of the opening portion of the harness insertion hole with respect to the wire harness is changed corresponding to the extension angle. Can do. Therefore, even when the outer diameter of the wire harness varies, the variation in the operating force required for assembling the first wall portion and the second wall portion is suppressed, and the waterproofness of the opening portion of the harness insertion hole is advantageously ensured. be able to.

The disassembled perspective view of the electrical-connection box as one Embodiment of this invention. FIG. 2 is an exploded perspective view of a lower case and a slide cover of the electrical junction box shown in FIG. 1. The top view of the lower case of the electrical-connection box shown in FIG. The front view of the lower case of the electrical junction box shown in FIG. Sectional drawing equivalent to the VV cross section of the lower case shown in FIG. Sectional drawing equivalent to the VI-VI cross section of the lower case shown in FIG. Sectional drawing which shows the state with which the box main body and upper case shown in FIG. 1 were assembled | attached in the VII-VII cross section of the lower case shown in FIG. FIG. 7 is a cross-sectional view of the lower case shown in FIG. 6, illustrating a state in which a small-diameter wire harness is inserted through the harness insertion hole. The figure which shows the state by which the large diameter wire harness was penetrated by the harness penetration hole in sectional drawing of the lower case shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, FIG. 1 shows an electrical junction box 10 as an embodiment of the present invention. The electrical junction box 10 includes a box body 12 in which electrical components, current-carrying members, and the like are disposed, an upper case 14, and a lower case 16. The upper case 14 and the lower case 16 are overlapped and assembled from both sides of the box body 12. In the following description, unless otherwise specified, the upper direction is a vertical upper direction in the assembled state of the electrical junction box 10 to the vehicle body, and the upper and lower directions in FIG. 1 where the upper case 14 is located. Is a vertically lower position in the assembled state, and is a lower position in FIG. 1 where the lower case 16 is located.

  The lower case 16 is made of a synthetic resin. As shown in FIGS. 2 and 3, the lower case 16 has a structure in which peripheral walls 20 a to 20 d having a substantially rectangular frame shape extending from the outer peripheral edge of the bottom wall 18 to the entire periphery protrude upward and are integrally formed. It is made into the box shape which has the opening part 22 in the box main body 12 side.

  A plurality of reinforcing ribs 24 are formed on the peripheral walls 20a to 20d at appropriate intervals in the circumferential direction of the peripheral walls 20a to 20d. Each reinforcing rib 24 is formed by the peripheral walls 20 a to 20 d being partially recessed inward of the lower case 16. Thereby, the shape of the cross section of the peripheral walls 20a to 20d (the cross section in the horizontal direction orthogonal to the vertical direction) is an uneven shape. The reinforcing rib 24 protrudes inward of the peripheral walls 20a to 20d with a predetermined width in the circumferential direction of the peripheral walls 20a to 20d and extends in the vertical direction. On the outer surfaces of the peripheral walls 20 a to 20 d, the lower end edge of the reinforcing rib 24 is opened below the lower case 16. On the other hand, the upper end surface of the reinforcing rib 24 is formed as a tapered surface 26 whose projecting dimension toward the inside of the case gradually increases as it goes downward. A protruding leading edge 28 on the tapered surface 26 toward the inside of the case is positioned inward of the case relative to the peripheral wall 108 of the box body 12 assembled to the lower case 16 as will be described later.

  On the outer surfaces of the peripheral walls 20a and 20c, a plurality of lock portions 34 (two in each of the peripheral walls 20a and 20c in the present embodiment) projecting upward are formed. Further, mounting legs 36 and 38 are formed on the outer surfaces of the peripheral walls 20a and 20c so as to project outward from the lower case 16. Bolt insertion holes 40 are provided through the mounting legs 36 and 38.

  As shown in FIG. 2, a large opening window 42 having a substantially rectangular shape in the front view is cut out between the lock portions 34, 34 on the peripheral wall 20 c, and a slide cover 44 that covers the opening window 42 is attached. As a result, the lower case 16 is configured. In short, in the present embodiment, the first wall portion and the second wall portion constituting the case are constituted by the peripheral wall 20 c and the slide cover 44.

  A pair of guide rails 46, 46 projecting inward of the opening window 42 from both side edges of the opening window 42 are provided on the peripheral wall 20 c as the first wall part. The pair of guide rails 46 are provided over the entire length of each side edge of the opening window 42 (the entire length in the vertical direction in FIG. 2), and the upper end side of the peripheral wall 20 c is a thin portion 48. A portion extending from the middle portion to the lower end side of the peripheral wall 20c is a thick portion 50 (see FIG. 5 which is a VV cross section in FIGS. 2 and 4). A step surface 49 is formed between the thin portion 48 and the thick portion 50 of each guide rail 46.

  Further, the thick wall portion 50 of each guide rail 46 is provided with a concave groove 52 that opens to the outer surface of the peripheral wall 20c, so that even when water or the like enters from the overlapping surface of the slide cover 44 and the guide rail 46. The drainage from the concave groove 52 to the lower side of the peripheral wall 20c is promoted to prevent water from entering the inside of the electrical junction box 10. Lock claws 54, 54 are provided below the concave grooves 52, 52 provided in the pair of guide rails 46, 46. Yes.

  Further, a pair of cutout portions 58 and 58 are provided on the bottom edge portion 56 of the opening window 42. The pair of first notches 58 are provided side by side with a gap in the width direction of the opening window 42 (left and right direction in FIG. 4), and are substantially convex downward at the bottom edge 56 of the opening window 42. A semicircular arc shape is opened and cut away. A positioning rib 60 protruding upward from the bottom edge portion 56 of the opening window 42 is provided between the pair of first cutout portions 58 and 58. Further, the bottom edge portion 56 of the opening window 42 is provided with reinforcing ribs 62 and 62 that are disposed on the inner surface side of the peripheral wall 20c and are integrally connected to the guide rails 46 and 46 and the positioning rib 60, respectively. ing.

  Further, on the outer surface of the peripheral wall 20c as the first wall portion, there are thin plate-like inclined guide portions 64, 64 projecting outward from the lower case 16 from the peripheral portions of the pair of first notches 58, 58. , Each projecting. Each inclined guide portion 64 protrudes outward while inclining toward the central axis of the substantially semicircular arc-shaped first notch 58 (center axis C of a harness insertion hole 82 described later).

  Thus, the slide cover 44 as the second wall portion is attached to the opening window 42 provided in the peripheral wall 20c. The slide cover 44 has a substantially rectangular plate shape having an outer dimension slightly larger than that of the opening window 42, and guide rails 46, 46 provided on the opening window 42 are inserted into both side edges. Recesses 66, 66 are provided. As shown in the sectional view of FIG. 5, each guide recess 66 has a narrow width portion 68 corresponding to the thin portion 48 of the guide rail 46 on the upper end side, and a portion extending from the intermediate portion to the lower end portion is a guide rail. 46 is a wide portion 70 corresponding to the thick portion 50, and a step surface 69 is formed between the narrow portion 68 and the wide portion 70.

  In the center portion of the slide cover 44, a plurality of lightening recesses 72 opened to the outer surface are provided. Furthermore, the upper end portion of the center portion of the slide cover 44 is provided with a stepped portion 74 whose outer surface is greatly recessed and thinned, so that an unnecessary amount of resin is reduced.

  When the slide cover 44 serving as the second wall portion is mounted, the lower end portion 76 of the slide cover 44 that comes into contact with the bottom edge portion 56 of the opening window 42 has a pair of first portions provided on the bottom edge portion 56. A pair of second cutout portions 78 and 78 are provided at positions facing the cutout portion 58. The pair of second cutout portions 78 and 78 are provided with a gap in the width direction (left and right direction in FIG. 4) of the lower end portion 76 of the slide cover 44, and protrudes upward at the lower end portion 76 of the slide cover 44. An approximately semicircular arc shape is opened and cut out. A semi-ring-shaped projection 79 that is biased toward the outer surface of the slide cover 44 and protrudes toward the first notch 58 is provided on the end surfaces of the pair of second notches 78 and 78 over the entire circumference. And projecting with a substantially constant thickness (see FIGS. 4 and 6). Although not shown, a positioning recess is formed between the pair of second cutout portions 78 and 78 to receive the positioning rib 60 provided on the bottom edge portion 56 of the opening window 42. Further, on the lower end portion 76 side of the slide cover 44, on both sides of the second notch portions 78, 78, positions corresponding to the lock claws 54, 54 protruding from the peripheral wall 20c, from the outer surface of the slide cover 44. A pair of lock portions 80 and 80 projecting in the shape of a rectangular frame is provided.

  In the slide cover 44 having such a structure, the guide recesses 66 and 66 provided on both side edges are inserted into the guide rails 46 and 46 provided in the opening window 42 from the opening 22 side of the peripheral wall 20c, respectively. It is slid to the opening window 42 so as to be inserted. When the slide cover 44 is pushed below the opening window 42 and the lower end 76 of the slide cover 44 comes close to the bottom edge 56 of the opening window 42, the slide cover 44 protrudes from the bottom edge 56 of the opening window 42. The positioning rib 60 is fitted into a positioning recess provided in the lower end 76 of the slide cover 44, and the positioning of the slide cover 44 with respect to the opening window 42 in the width direction is completed. Further, when the slide cover 44 is pushed downward, the lock portions 80 and 80 of the slide cover 44 come into contact with the lock claws 54 disposed below the guide rails 46 and elastically deform outward to lock the lock claws. It goes over 54 and returns to elasticity. As a result, as shown in FIGS. 1 and 4, in a state where the lock claw 54 is housed in the frame of the lock portion 80, the lock portion 80 and the lock claw 54 are engaged, and the slide cover 44 is against the opening window 42. Locked to the mounted state.

  As described above, when the slide cover 44 is positioned and mounted with respect to the opening window 42 and locked, the step surface 49 of the guide rail 46 and the step surface 69 of the guide recess 66 are in contact with each other. The bottom edge portion 56 of the opening window 42 and the lower end portion 76 of the slide cover 44 are brought into contact with each other, and positioning in the sliding direction (vertical direction in FIG. 4) is performed. Further, as described above, the positioning rib 60 projecting from the bottom edge portion 56 of the opening window 42 and the positioning recess provided in the lower end portion 76 of the slide cover 44 allow the width direction (right and left in FIG. 4) to be orthogonal to the sliding direction. 4), the first cutouts 58, 58 provided at the bottom edge of the opening window 42 and the lower end of the slide cover 44 are provided. The second notches 78 and 78 thus formed are connected to each other on the peripheral edge side, and the substantially cylindrical harness insertion holes 82 and 82 penetrating the peripheral wall 20c are configured in the side-by-side state in the peripheral direction of the peripheral wall 20c. .

  As described above, the harness insertion hole 82 configured by connecting the first notch portion 58 and the second notch portion 78 in the front direction shown in FIG. 4 is the circumferential direction of the lower case 16 of the harness insertion hole 82 (FIG. 4). A radial dimension d1 extending in the middle and left and right directions is a radial dimension d2 extending in the vertical direction of the lower case 16 (vertical direction in FIG. 4) (the protrusion 79 of the second notch 78 and the first notch 58). Is substantially equal to the separation distance). On the other hand, an inclined guide portion 64 that protrudes outward from the lower case 16 while being inclined toward the central axis C of the harness insertion hole 82 is provided at the peripheral edge of the first notch 58 so as to be inclined. In the opening 84 of the harness insertion hole 82 defined by the protruding end edge 86 of the guide portion 64 and the second cutout portion 78, on the radial line extending in the vertical direction of the lower case 16 in the front view shown in FIG. 4. The separation distance d3 between the protrusion 79 of the second notch 78 and the protruding end edge 86 of the inclined guide part 64 is smaller than d1 and d2 (d3 <d1, d2).

  Further, as shown in an enlarged view in FIG. 6, the opening diameter of the opening 84 of the harness insertion hole 82 is relative to the central axis C rather than φ1 measured in the direction orthogonal to the central axis C of the harness insertion hole 82. Φ2 measured in the direction inclined by the inclination angle α at which the inclination guide part 64 is inclined is larger (φ1 <φ2). In this embodiment, the opening diameter φ1 of the opening 84 of the harness insertion hole 82 measured in the direction orthogonal to the central axis C is the minimum value of the dimensional tolerance of the wire harness 112 described later that is inserted through the harness insertion hole 82. Is set to In addition, the opening diameter φ2 of the opening 84 of the harness insertion hole 82 measured in the direction inclined by the inclination angle α with respect to the central axis C is the maximum dimensional tolerance of the wire harness 112 described later that is inserted through the harness insertion hole 82. Is set to a value. In addition, inclination | tilt angle (alpha) can be arbitrarily set according to the dimensional tolerance of the wire harness 112 which should be absorbed.

  The box body 12 is assembled to the lower case 16 via the upper case 14. FIG. 7A shows a cross-sectional view taken along the line VII-VII in FIG. 3 with the upper case 14 and the lower case 16 assembled to the box body 12. FIG. 7B shows an enlarged view of the portion b shown in FIG. As shown in FIGS. 1 and 7, the upper case 14 has a box shape made of a synthetic resin having an opening 90 that opens toward the lower case 16, and is an upper wall having a substantially rectangular flat plate shape. An outer peripheral wall 94 is projected over the entire circumference of 92. On the inner side of the outer peripheral wall 94, an inner peripheral wall 96 having a larger projecting dimension from the upper wall 92 than the outer peripheral wall 94 is formed. Thus, a substantially rectangular opening 90 substantially corresponding to the opening 22 of the lower case 16 is formed by the protruding end portion of the inner peripheral wall 96 from the upper wall 92. Further, a fitting groove 98 is formed between the outer peripheral wall 94 and the inner peripheral wall 96 so as to extend over the entire periphery in the outer peripheral portion of the upper case 14.

  Further, as shown in FIG. 1 and the like, at the position corresponding to the lock portion 34 of the lower case 16 on the outer surface of the outer peripheral wall 94, a protruding lock claw 100 protruding outward at the protruding tip from the upper wall 92. Is formed. Further, as shown in FIG. 7 and the like, a hook-shaped body lock portion 102 for locking the box body 12 is formed on the inner surface of the inner peripheral wall 96.

  The box body 12 is assembled to such an upper case 14. As shown in FIG. 1, the box body 12 is made of a synthetic resin and has a substantially rectangular outer shape substantially corresponding to the openings 22 and 90 of the upper case 14 and the lower case 16. A plurality of connector mounting portions 104, fuse mounting portions 106, and the like are formed on the box body 12, and a connector 114, which will be described later, and a fuse (not shown) as electrical components are connected thereto. Further, as shown in FIG. 7, in the peripheral wall 108 constituting the outer peripheral edge portion of the box body 12, a protrusion-like shape protruding outward from the box body 12 is located at a position corresponding to the body lock portion 102 of the lower case 16. A lock claw 110 is formed.

  As shown in FIG. 7, the connector 114 provided at the terminal of the wire harness 112 is attached to the connector attachment portions 104 of the box body 12 from below. Thereby, from the box main body 12, the some wire harness 112 connected with the connector 114 is extended below. In addition, a fuse (not shown) as an electrical component is mounted on the fuse mounting portion 106 from below.

  Then, the upper case 14 is overlaid on the box body 12 on which electrical components such as connectors 114 and fuses are mounted, and the box body 12 is inserted into the inner peripheral wall 96 of the upper case 14 from the opening 90 of the upper case 14. . As a result, the main body locking portion 102 formed on the inner peripheral wall 96 of the upper case 14 and the lock claw 110 of the box main body 12 are engaged, and the box main body 12 is integrated with the upper case 14 in the accommodated state in the upper case 14. (See FIG. 7). In addition, the box main body 12 protrudes downward from the inner peripheral wall 96 in the assembled state to the upper case 14.

  Then, the upper case 14 assembled with the box body 12 is superimposed on the lower case 16, and the box body 12 is inserted into the opening 22 of the lower case 16. At the same time, as shown in FIG. 7, the upper end edges of the peripheral walls 20 a to 20 d of the lower case 16 are fitted into the fitting grooves 98 of the upper case 14. Then, the upper case 14 is assembled to the lower case 16 by engaging the lock portion 34 of the lower case 16 with the lock claw 100 (see FIG. 1) of the upper case 14. As a result, the box body 12 assembled to the upper case 14 is accommodated in the peripheral walls 20 a to 20 d of the lower case 16. The box body 12 is covered with the upper case 14 from above, and is covered with the lower case 16 from below, so that the electrical connection box 10 is formed.

  In the electrical junction box 10 of this embodiment having such a configuration, the wire harness 112 accommodated in the lower case 16 is drawn out from the harness insertion hole 82 to the outside. In particular, since the harness insertion hole 82 has a divided structure by the first notch 58 and the second notch 78 formed in the opening window 42 and the slide cover 44 of the peripheral wall 20c of the lower case 16, respectively, The wire harness 112 can be easily pulled out.

  Specifically, the slide cover 44 is temporarily detached from the lower case 16 before the upper case 14 and the lower case 16 are assembled. Then, the predetermined wire harness 112 drawn out from the harness insertion hole 82 is fitted into the first notch 58 provided at the bottom edge portion 56 of the opening window 42 and pulled out of the lower case 16 from the opening window 42. Keep it. Thereafter, the slide cover 44 is slid onto the opening window 42, and the lock portion 80 is locked with the lock claw 54 and the slide cover 44 is opened until the bottom edge portion 56 and the lower end portion 76 reach the insertion end. Push it into the window.

  At this time, as shown in an enlarged view in FIG. 8, when the diameter φH of the wire harness 112 is relatively small, for example, when the dimensional tolerance is the minimum value, the wire harness 112 is connected to the central axis C of the harness insertion hole 82. It is pulled out from the harness insertion hole 82 so as to extend in the same substantially axial direction. That is, as shown in FIG. 6, the opening diameter φ1 of the opening 84 of the harness insertion hole 82 measured in the direction orthogonal to the central axis C of the harness insertion hole 82 is set to the minimum value of the dimensional tolerance of the wire harness 112. Therefore, by pulling out the wire harness 112 from the harness insertion hole 82 so as to extend in substantially the same direction as the central axis of the harness insertion hole 82, the gap between the opening 84 of the harness insertion hole 82 and the wire harness 112. It is possible to prevent a large gap from being generated, and to ensure the waterproofness of the harness insertion hole. In addition, when the slide cover 44 is assembled to the opening window 42, the wire harness 112 does not act as a resistance and the assembling operation force does not increase. When the wire harness 112 with the diameter φH having a minimum dimensional tolerance is inserted, as shown in FIG. 8, the harness insertion hole 82 and the hole insertion hole 82 are located on the inner side of the lower case from the opening 84 of the harness insertion hole 82. A slight gap: g is generated between the wire harnesses 112.

  On the other hand, as shown in an enlarged view in FIG. 9, when the diameter φH ′ of the wire harness 112 is relatively large, for example, when the dimensional tolerance is the maximum value, the wire harness 112 follows the inclination of the inclined guide portion 64. It is pulled out from the harness insertion hole in a state of being bent and inclined with respect to the central axis C of the harness insertion hole 82. That is, as shown in FIG. 6, the opening diameter φ1 of the opening 84 of the harness insertion hole 82 measured in the direction orthogonal to the central axis C of the harness insertion hole 82 is set to the minimum value of the dimensional tolerance of the wire harness 112. Therefore, when the diameter φH ′ of the wire harness 112 is larger than that, the inclined guide in which the wire harness 112 is positioned below the protruding end edge 86 of the inclined guide portion 64 as the slide cover 44 is pushed. The wire harness 112 is bent so as to be pushed toward the base end side of the portion 64, and the wire harness 112 is inclined with respect to the central axis C of the harness insertion hole 82 along the inclination of the inclined guide portion 64.

  As shown in FIG. 6, the opening diameter φ2 of the opening 84 of the harness insertion hole 82 measured in the direction inclined by the inclination angle α at which the inclination guide portion 64 is inclined with respect to the central axis C of the harness insertion hole 82 is Since the opening diameter φ1 of the opening 84 of the harness insertion hole 82 measured in the direction orthogonal to the central axis C of the insertion hole 82 is set to the maximum value of the dimensional tolerance of the wire harness 112, the inclined guide portion The wire harness 112 inclined along the inclination of 64 can be pulled out from the harness insertion hole 84, and a gap is prevented from being generated between the opening 84 of the harness insertion hole 82 and the wire harness 112, The waterproofness of the harness insertion hole 84 can be ensured. When the wire harness 112 is inclined along the inclined guide portion 64, the state shown in FIG. 8, that is, the wire harness 112 and the harness that are generated when the wire harness 112 extends in the same axial direction as the central axis C. Since the wire harness 112 is curved and tilted by absorbing the gap g on the inner side of the insertion hole 82, there is no interference that causes resistance when the slide cover 44 is pushed in, and is necessary for mounting the slide cover 44. It is possible to prevent a significant increase in operating force.

  In short, in the electrical junction box 10 of the present embodiment, the inclination angle of the wire harness 112 inserted through the harness insertion hole 82 using the inclination guide portion 64 is set to the inclination guide portion with respect to the central axis C of the harness insertion hole 82. By adjusting within the range of the inclination angle α of 64, the opening diameter of the opening 84 of the harness insertion hole 82 with respect to the wire harness 112 can be changed corresponding to the extension angle of the wire harness 112. Therefore, even when the outer diameter of the wire harness varies, it is possible to prevent a large gap from being generated in the opening of the harness insertion hole while suppressing variation in the operation force necessary for assembling the peripheral wall 20c and the slide cover 44. Can do it.

  In particular, in the present embodiment, in the inclined guide portion 64, the inner peripheral surface 65 of the inclined guide portion 64 that is a substantial guide surface in contact with the wire harness 112 is a curved surface that protrudes outward. (Refer to FIG. 6 and FIG. 9) The wire harness 112 can be bent and inclined more smoothly, and even when the diameter of the wire harness 112 is large, the operation force required to push the slide cover 44 is reduced. The increase can be advantageously reduced.

  In addition, the opening 84 of the harness insertion hole 82 is provided with a protrusion 79 protruding from the second notch 78 toward the first notch 58 at all. Thereby, the protrusion 79 can be pressed against the outer peripheral surface of the wire harness 112 inserted through the harness insertion hole 82, and water can be advantageously prevented from entering through the opening 84.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited by the specific description. For example, in the above-described embodiment, the inclined guide portion 64 is configured by a thin plate member, but the inclined guide portion 64 has a guide surface that inclines the wire harness 112 toward the central axis side of the harness insertion hole 84. A specific shape is not limited as long as it is provided. For example, a guide surface that is inclined toward the central axis side of the harness insertion hole 84 may be provided as an inclined guide portion on the upper end surface of the protrusion protruding in a block shape from the peripheral wall 20c.

  Further, the first wall portion and the second wall portion constituting the case are not limited to the slide cover 44 that covers the peripheral wall 20c of the lower case 16 and the opening window 42 provided therein as in the above embodiment. For example, the peripheral wall of the upper case and the lower case that are combined with each other may be the first wall portion and the second wall portion, or the peripheral wall of the case and the peripheral wall are attached to the peripheral wall via a hinge to cover the opening of the peripheral wall. You may comprise a 1st wall part and a 2nd wall part with a cover member.

  In the above-described embodiment, the harness insertion hole 82 is divided into the first notch portion 58 and the second notch portion 78. However, one notch portion has a wider area than the other notch portion. The insertion hole 82 may be defined. Further, the shapes of the first notch portion 58 and the second notch portion 78 are not limited to the semicircular arc shape, and those arbitrarily changed corresponding to the shape of the wire harness 112 such as a polygonal shape or an elliptical shape are also included in the present invention. Of course, it is included.

  Moreover, in the said embodiment, although the protrusion 79 was provided in the 2nd notch part 78, it does not necessarily need to be provided. Further, a protruding portion that protrudes toward the central axis of the harness insertion hole 82 may be provided at the protruding end edge portion 86 of the inclined guide portion 64.

10: electrical connection box, 16: lower case (case), 20a to d: peripheral wall (first wall), 42: opening window, 44: slide cover (second wall), 58: first notch, 64 : Inclined guide part, 65: Inner peripheral surface, 78: Second notch part, 79: Projection part, 82: Harness insertion hole, 112: Wire harness

Claims (3)

The first wall portion and the second wall portion constituting the case are combined with each other, so that a cylindrical harness insertion hole penetrating the outer wall is formed between them, and the wire accommodated inside the case In the electrical junction box in which the harness is drawn out from the harness insertion hole,
While the harness insertion hole is configured by connecting a first notch provided in the first wall part and a second notch provided in the second wall part,
The first wall portion is provided with an inclined guide portion that protrudes toward the outside of the case from the peripheral edge portion of the first notch portion while inclining toward the central axis side of the harness insertion hole. An electrical junction box characterized by that.   The electrical junction box according to claim 1, wherein an inner peripheral surface of the inclined guide portion is a curved surface that protrudes outward in an axial section of the harness insertion hole.   The electrical junction box according to claim 1 or 2, wherein a protrusion projecting toward the first notch portion is provided at the second notch portion of the second wall portion.

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