JP5510888B2 - Electrical junction box - Google Patents

Description

  The present invention relates to an electrical junction box having an insertion part for inserting an electric wire or the like, and a lid part that covers an opening of the insertion part being openable and closable via a hinge part.

  Conventionally, in an electric junction box mounted on a vehicle such as an automobile, for the purpose of facilitating the handling of electric wires connected to the electric junction box or suppressing fluttering of external electric wires routed in the vicinity of the electric junction box, etc. In addition, those capable of holding electric wires are known.

  For example, as described in Japanese Patent Application Laid-Open No. 2006-81276 (Patent Document 1), such an electrical junction box accommodates an electric wire in an insertion state formed in an insertion portion formed in an outer peripheral side, and is inserted. The electric wire is held by covering the opening of the part with a lid. The lid portion is integrally formed on one side in the width direction of the insertion portion via a hinge portion.

  By the way, the hinge part may be deteriorated by repeated opening / closing operations, vibrations during traveling of the vehicle, and the like. When the hinge portion breaks, the lid portion may fall off from the electrical junction box, and may become a foreign object, damaging other components or obstructing the operation of other components.

  In many cases, the electrical connection box is composed of a box body to which an electric wire such as a wire harness or a crimped electric wire is connected and a cover member that covers the box body. Such an electrical connection box has a problem that when the hinge portion is broken and the lid portion is dropped, water easily enters from the fitting portion of the box body and the cover member.

  Therefore, in Japanese Patent Application Laid-Open No. H10-260707, the applicant of the present invention provides a locking projection on the outer surface of the lid portion provided on the box body, and engages the locking projection with a locking portion provided on the lower cover as a cover member. Thus, even when the hinge portion is broken, an electrical junction box has been proposed that prevents the lid portion from falling off due to the engaging action between the locking projection and the engaging portion.

  However, the electrical junction box described in Patent Document 1 requires a new engagement portion to be added to the lid portion and the lower cover, resulting in a complicated structure. Further, in order to engage the locking protrusion of the lid and the locking portion of the lower cover, it is necessary to assemble the lower cover to the box body while maintaining the closed state of the lid. Therefore, in order to open the lid, the lower cover has to be removed from the box body, which requires time and effort, and still has room for improvement.

JP 2006-81276 A

  The present invention has been made in the background of the above-described circumstances, and the solution to the problem is that the hinge portion has a simple structure while ensuring the operability of the lid portion that can be opened and closed via the hinge portion. An object of the present invention is to provide an electrical junction box having a novel structure capable of reducing the risk of the lid portion falling off and the risk of water intrusion even when it breaks.

  A first aspect of the present invention includes a box body made of a synthetic resin to which an electric wire is attached and a cover that covers a lower surface of the box body, and is inserted through the wire by opening in an outer peripheral surface of the box body In the electrical junction box, the lid portion that covers the opening to the outside of the box body in the insertion portion is openable and closable via a hinge portion integrally formed with the box body. The box body is formed with a locking recess that opens toward the outer peripheral surface of the box body and the cover, and the locking recess is on the opposite side of the lid from the hinge portion. A locking projection that engages with a locking claw protruding from the end is formed, and the cover is closed by covering the opening on the cover side of the locking recess. Further, the wall portion located below the lid portion is integrally formed. .

  According to the electrical junction box structured according to this aspect, the wall portion provided on the cover is disposed below the closed lid portion in the assembled state of the box body and the cover. Thereby, even when the hinge portion is broken and the lid portion is separated from the box body, the lid portion is prevented from falling off by holding the lid portion with the locking portion by the locking protrusion and the wall portion. I can do it. Thereby, it is possible to avoid the possibility that the lid portion becomes a foreign object and damages other components. Moreover, since the opening part by the side of the cover of the latching recessed part is covered with a wall part, permeation of water can be suppressed.

  Furthermore, the wall part is integrally formed in the cover separate from the box body. Thereby, without increasing the number of parts, it is possible to obtain the effect of preventing the lid from falling off and the effect of preventing infiltration with a simple configuration. At the same time, the operability of the lid can be ensured without affecting the shape of the locking recess in the box body. That is, it is preferable that some deformation of the locking projection is allowed in order for the locking claw to get over the locking projection when the lid is closed. And according to this aspect, since the wall part is provided in the cover, the formation part of a latching protrusion can employ | adopt a shape as usual, and can maintain favorable operativity.

  According to a second aspect of the present invention, in the one described in the first aspect, the insertion portion is opened toward an outer peripheral surface of the box body and the cover, and the insertion portion and the locking portion are provided. While the recesses are formed side by side, the cover opens toward the outer peripheral surface of the cover and the box body with an opening width larger than the width of the insertion portion and the locking recess. At the same time, a communication concave portion connected to the cover-side opening in the insertion portion is formed, and the wall portion is formed so as to protrude from the inner wall and the side wall of the communication concave portion.

  According to this aspect, the wall portion is connected to the side wall of the communication recess and the inner wall located at the inner side of the electrical junction box at the bottom of the recess. Thereby, while being able to mutually reinforce the intensity | strength of a wall part and a communication recessed part, the penetration | invasion of water can be suppressed more effectively. Further, since the wall portion extends to the inner wall of the communication recess, it is possible to reduce the catch between the electric wire accommodated in the communication recess and the wall portion.

  According to the present invention, the opening of the locking recess formed with the locking projection for locking the lid is covered with the wall formed integrally with the cover, and the wall is positioned below the lid. I did it. As a result, even when the hinge portion is broken, the lid portion can be locked by the wall portion to prevent the falling off and to prevent water from entering. In addition, since the wall portion is integrally formed on the cover side, the number of parts is not increased. At the same time, it does not affect the shape of the formation of the locking projections for locking the lid in the box body, so that the operability of the lid can be ensured.

The top view of the electrical junction box as one Embodiment of this invention. The side view of the electric junction box shown in FIG. The principal part enlarged view in FIG. The principal part enlarged view in FIG. The top view of the cover which comprises the electrical-connection box shown in FIG. The side view of the cover shown in FIG. The principal part enlarged view which shows the closed state of the cover part in FIG. The principal part enlarged view which shows the closed state of the cover part in FIG.

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

  First, FIG. 1 and FIG. 2 show an electrical junction box 10 as an embodiment of the present invention. The electrical junction box 10 includes a box body 12 and a lower cover 14 as a cover.

  The box body 12 is an integrally molded product made of non-conductive synthetic resin. The box body 12 is provided with a component accommodating portion 16 to which electrical components such as a fuse, a relay, and a fusible link are connected. The outer periphery of the component accommodating portion 16 is surrounded by an outer peripheral wall 18. Yes. A lock claw 19 is provided at an appropriate position at the end of the outer peripheral wall 18 on the lower cover 14 side. Further, the outer wall 18 is provided with a vehicle mounting portion 20a protruding at an appropriate position.

  The box body 12 is formed with a groove-shaped insertion portion 22 that opens to the outer peripheral side. As shown in FIGS. 3 and 4, the insertion portion 22 has a groove shape extending in the vertical direction of the box body 12 (vertical direction in FIG. 4), and is an outer opening that opens to the outer peripheral side of the box body 12. 23, and an upper opening 25a and a lower opening 25b that open on both sides in the groove length direction (vertical direction in FIG. 4). As a result, the lower opening 25 b is an opening to the lower cover 14 side in the insertion portion 22. A positioning rib 28 that is connected to both side surfaces 26 a and 26 b of the insertion portion 22 and protrudes inward of the insertion portion 22 is formed on the inner surface 24 located at the back of the insertion portion 22. The protruding end edge portion of the positioning rib 28 from the inner surface 24 is located in the insertion portion 22 and has a semicircular cutout shape, and an electric wire 70 (see FIG. 7) described later can be stably inserted in the insertion portion 22. It can be held.

  In addition, a locking recess 30 is formed in the box body 12 in parallel with the insertion portion 22. The locking recess 30 has a groove shape extending in the vertical direction (the vertical direction in FIG. 4) of the box body 12, has an outer opening 31 that opens to the outer peripheral side of the box body 12, and has a groove length. It has an upper opening 33a and a lower opening 33b that open on both sides in the direction (the vertical direction in FIG. 4). As a result, the lower opening 33 b is an opening to the lower cover 14 side in the locking recess 30. A plate-like side wall 32 that protrudes to the outer peripheral side of the box body 12 is formed between the locking recess 30 and the insertion portion 22, and one side surface 26 a of the insertion portion 22 is formed by one surface of the side wall 32. It is formed, and one side surface 34 of the locking recess 30 is formed by the other surface. A locking projection 36 that protrudes inward of the locking recess 30 is formed on the side edge 34 protruding to the outer peripheral side of the box body 12. The locking projection 36 is partially formed at an intermediate portion of the side surface 34 in the height direction (vertical direction in FIG. 4).

  Further, a lid portion 38 is integrally formed on the outer peripheral wall 18 of the box body 12 on the side surface 26 b side of the insertion portion 22. The lid portion 38 has a shape in which an inner plate portion 39a located inside the box body 12 in a closed state and an outer plate portion 39b located outside are overlapped. The inner plate portion 39a is formed in a substantially rectangular plate shape having a size that covers the entire outer opening 23 of the insertion portion 22 when the lid portion 38 is closed, while the outer plate portion 39b is closed with the lid portion 38 closed. In the state, it has a substantially rectangular plate shape that covers the entire outer opening 31 of the locking recess 30 together with the entire outer opening 23 of the insertion portion 22. Between one end edge of the lid portion 38 and the outer peripheral wall 18, a hinge portion 40 that is thinner than the lid portion 38 and is formed so as to be bendable is integrally formed. 18 can be opened and closed. The hinge portion 40 is bent so that the outer opening 23 in the insertion portion 22 is covered with the lid portion 38.

  Further, on the inner surface 41 of the inner plate portion 39a in the lid portion 38, an engaging claw 42 is integrally formed at the end portion on the opposite side to the hinge portion 40. The locking claw 42 protrudes toward the locking recess 30 in the closed state of the lid portion 38, and the protruding end edge of the locking claw 42 protrudes toward the locking projection 36 of the locking recess 30. Has been. Note that an auxiliary locking claw 44 protrudes from the end of the inner surface 41 on the hinge portion 40 side and is integrally formed with the lid 38, and the auxiliary locking claw 44 is integrated with the inner surface of the outer peripheral wall 18 when the lid 38 is closed. By being locked to the side, the closed state of the lid portion 38 is more stably maintained.

  5 and 6 show the lower cover 14. The lower cover 14 is an integrally molded product made of non-conductive synthetic resin. The lower cover 14 has a substantially box shape that opens upward (in FIG. 6, upward). On the outer peripheral wall 46 of the lower cover 14, a lock frame 48 that protrudes toward the box body 12 protrudes at a position corresponding to the lock claw 19 of the box body 12. In addition, the outer peripheral wall 46 is formed with an attachment portion 20b to the vehicle at an appropriate position.

  A locking rib 50 that protrudes to the outer peripheral side of the lower cover 14 is formed integrally with the end of the outer peripheral wall 46 on the box body 12 side over substantially the entire periphery. As shown in FIG. 6, the upper edge of the outer peripheral wall 46 that protrudes from the locking rib 50 toward the box body 12 (upper side in FIG. 6) is a fitting portion 52 with the box body 12. .

  Further, in the lower cover 14, a communication recess 54 is formed at a position located below the insertion portion 22 and the locking recess 30 in the assembled state to the box body 12. The communication recess 54 has a groove shape extending in the vertical direction of the lower cover 14 (vertical direction in FIG. 6), has an outer opening 55 that opens to the outer peripheral side of the lower cover 14, and has a groove length direction (FIG. 6). It has an upper opening 57a and a lower opening 57b that open on both sides (in the middle and vertical directions). The opening width dimension w on the box body 12 side of the communication recess 54 is larger than the combined width dimension W (see FIG. 3) of the insertion section 22 and the locking recess 30.

  A reinforcing rib 56 is formed in such a communication recess 54. The reinforcing rib 56 is formed in a plate shape integrally formed with the lower cover 14 so as to enter the communication recess 54 continuously from the locking rib 50 formed on the outer peripheral wall 46. Thereby, the reinforcing rib 56 is connected to the inner wall 58 located at the back of the communication recess 54 and the side walls 60a, 60b on both sides, and has a plate shape protruding from the inner wall 58 to the outer peripheral side. In the reinforcing rib 56, a rectangular notch 62 that opens to the outer peripheral side is formed on one side wall 60 a side, and the other side wall 60 b side that is a portion where the notch 62 is not formed is a wall portion 64. Thereby, the wall part 64 is connected to the inner wall 58 and the side wall 60b, and has a plate shape that extends perpendicular to the groove length direction (vertical direction in FIG. 6) of the communication recess 54. The lower surface of the wall portion 64 is reinforced by connecting a triangular plate-like support rib 66 protruding from the side wall 60b.

  Then, as shown in FIG. 2, the lower cover 14 is overlapped below the box body 12, and the lock claw 19 of the box body 12 and the lock frame 48 of the lower cover 14 are engaged, whereby the lower cover 14 is attached to the box body 12. And the lower surface of the box body 12 is covered with the lower cover 14. The box body 12 is positioned with respect to the lower cover 14 by the outer peripheral wall 18 being locked by the locking rib 50 of the lower cover 14, and with respect to the fitting portion 52 of the lower cover 14. The outer peripheral wall 18 of the box main body 12 is externally fitted.

  In the assembled state of the lower cover 14 to the box body 12, the communication recess 54 of the lower cover 14 is positioned below the insertion portion 22 and the locking recess 30 of the box body 12. As shown in FIG. 4, the lower opening 25 b of the insertion portion 22 is communicated with the communication recess 54 through the notch 62 formed in the reinforcing rib 56 of the communication recess 54. As a result, the insertion portion 22 and the communication recess 54 form a wire receiving groove 68 that extends in the vertical direction (vertical direction in FIG. 4) over the entire box body 12 and the lower cover 14. On the other hand, a wall portion 64 formed on the reinforcing rib 56 of the communication recess 54 is positioned below the locking recess 30. As a result, the entire lower opening 33 b of the locking recess 30 is covered with the wall 64. As shown in FIG. 3, the wall 64 is protruded outward from the locking recess 30 at the protruding end toward the outer periphery of the lower cover 14.

  Then, as shown in FIGS. 7 and 8, the lid portion 38 is closed by bending the hinge portion 40 in a state where the electric wire 70 is inserted into the electric wire receiving groove 68, thereby locking the lid portion 38. The claw 42 enters the locking recess 30, gets over the locking projection 36, and is locked to the locking projection 36. Accordingly, the lid portion 38 is held in a closed state, and the outer opening 23 of the insertion portion 22 is covered with the lid portion 38. Thereby, the electric wire 70 is attached to the box body 12 while being held in the electric wire receiving groove 68. In the present embodiment, the outer plate portion 39b of the lid portion 38 protrudes from the hinge portion 40 to the opposite side of the inner plate portion 39a, so that the outer plate portion 39b opens the outer opening of the locking recess 30. The part 31 is also covered.

  According to the electrical junction box 10 having such a structure, the wall portion 64 is positioned below the end portion opposite to the hinge portion 40 in the closed state of the lid portion 38. Thereby, even when the hinge part 40 is broken for some reason, the box part of the lid part 38 is obtained by engaging the locking projection 36 and the locking claw 42 and locking the lid part 38 with the wall part 64. Dropping from the main body 12 can be prevented. In particular, in the present embodiment, the lid 38 is provided with the outer plate 39b so as to be thick, and the outer plate 39b protrudes to the opposite side of the hinge 40 from the inner plate 39a. Further, a larger contact area with the wall portion 64 is secured, and a more effective drop-off preventing effect is obtained.

  Further, since the lower opening 33b of the locking recess 30 is covered by the wall portion 64, the entry of water from below can be suppressed. Further, the outer peripheral wall 18 of the box body 12 is externally fitted and overlapped with the fitting portion 52 (see FIG. 6) of the outer peripheral wall 46 of the lower cover 14 on the box main body 12 side, so that water can be more effectively entered. It is possible to suppress it. In the closed state of the lid portion 38, the outer opening portion 23 of the insertion portion 22 and the outer opening portion 31 of the locking recess 30 can be covered with the outer plate portion 39b. The prevention effect is obtained.

  The wall 64 is integrally formed with the lower cover 14. Thereby, the fall prevention effect and the infiltration prevention effect of the cover part 38 can be acquired, without causing the increase in a number of parts. Furthermore, since the wall portion 64 is formed separately from the side wall 32 on which the locking projection 36 is formed in the locking recess 30, it is possible to avoid increasing the strength of the side wall 32. In the closing operation of 38, the bending deformation of the side wall 32 when the locking projection 36 of the locking claw 42 gets over can be allowed. At the same time, since the wall portion 64 is formed separately from the locking recess 30, the locking recess 30 can be formed open on both sides in the groove length direction. As a result, the locking projections 36 can be partially formed in the intermediate portion in the height direction of the side wall 32 by punching out on both sides of the locking recess 30 in the groove length direction. An increase in size of 36 can also be avoided. As a result, an excessive force is not required for the engaging operation between the locking claw 42 and the locking projection 36, and the operability of the lid portion 38 can be ensured.

  The wall 64 protrudes from the side wall 60 b of the communication recess 54, extends to the inner wall 58, and is connected to both the side wall 60 b and the inner wall 58. Thereby, the wall part 64 and the communication recessed part 54 can be mutually reinforced, the risk of deformation of the wall part 64 and the communication recessed part 54 can be reduced, and water can be prevented more effectively. I can do it. In particular, in the present embodiment, since the reinforcing rib 56 constituting the wall portion 64 is connected to the inner wall 58 and both side walls 60a and 60b of the communication recess 54, a more excellent reinforcing effect can be obtained. . In addition, since the wall 64 is continuous from the opening edge on the outer peripheral side of the communication recess 54 to the inner wall 58, the possibility of the wire 70 and the wall 64 being caught is reduced. It is possible to carry out storage and removal more easily.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited by the specific description. For example, the wall portion 64 may partially cover the lower opening 33b of the locking recess 30 and is necessarily connected to both the inner wall 58 and the side wall 60a of the communication recess 54. It doesn't have to be a thing. Further, the specific shape of the lid portion 38 is not limited to the above embodiment, and the outer plate portion 39b is not necessarily required.

10: Electrical connection box, 12: Box body, 14: Lower cover (cover), 18: Outer peripheral wall, 22: Insertion part, 23: Outer opening part, 25b: Lower opening part (opening part on the cover side), 30: Locking recess, 31: outer opening, 33b: lower opening (cover opening), 36: locking protrusion, 38: lid, 40: hinge, 42: locking claw, 46: outer periphery Wall: 54: Communication recess, 55: Outer opening, 58: Inner wall, 60a, b: Side wall, 64: Wall, 70: Electric wire

Claims (2)

A box body made of a synthetic resin to which an electric wire is mounted, and a cover that covers a lower surface of the box body, and an insertion portion that is opened in an outer peripheral surface of the box body and through which the electric wire is inserted is formed; In the electrical junction box that is openable and closable via a hinge part integrally formed in the box body, the lid part covering the opening to the outside of the box body in the insertion part,
The box main body is formed with a locking recess that opens toward the outer peripheral surface of the box main body and the cover, and the locking recess has an end opposite to the hinge portion in the lid portion. On the other hand, a locking projection that engages with a locking claw protruding from the portion is formed, while the cover is closed by covering the opening on the cover side in the locking recess. An electric junction box, wherein a wall portion located below the lid portion is integrally formed.   The insertion portion is opened toward the outer peripheral surface of the box body and the cover, and the insertion portion and the locking recess are formed side by side, while the cover includes the insertion portion and the insertion portion. An opening width dimension that is larger than the combined width dimension of the locking recess is opened toward the outer peripheral surface of the cover and the box body, and a communication recess is formed that connects to the cover-side opening in the insertion section. The electrical junction box according to claim 1, wherein the wall portion is formed so as to protrude from an inner wall and a side wall of the communication recess.

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