JP5594516B2 - Electrical junction box - Google Patents

Description

  The present invention relates to an electrical junction box mounted on an automobile or the like.

  Conventionally, in an automobile or the like, an electric junction box has been used for the purpose of improving the efficiency of electric wiring and improving maintainability. As described in JP 2005-253160 A (Patent Document 1), for example, this electrical junction box is provided with a plurality of electrical component mounting portions on which electrical components such as relays and fuses are mounted in an aligned state. It is attached to a support member such as a vehicle body via a vehicle attachment portion.

  By the way, as shown also in the said patent document 1, conventionally, the substantially rectangular box was employ | adopted as an electrical-connection box. Not only is a rectangular box generally used, but there are many rectangular fuses and relays to be accommodated, and because the engine room in the accommodation area is a substantially square area, accommodation efficiency and installation efficiency This is because it is considered good.

  However, in an electrical junction box having a conventional structure formed of a substantially rectangular box, it may be difficult to obtain sufficient rigidity and support strength for a support member such as a vehicle body. In particular, the central part of the substantially square bottom plate is less likely to be reinforced by the outer peripheral wall, and is easily swelled and deformed by the force exerted by inserting / removing connectors or tightening bolts. There is also a risk of lack of strength. In addition, when a support member such as a panel is supported by a straight part that is substantially one side of a square, the opposite side protrudes greatly outward from the support part by the support member, and excessive strength is required for the support part. May end up.

  In addition, when a space is left only at the corner in an engine room or the like, a conventional electric junction box made of a substantially square box has a triangular corner-shaped space remaining at the corner. There was also a problem that it was difficult to arrange.

JP-A-2005-253160

  The present invention has been made in the background of the above-mentioned circumstances, and the problem to be solved is that the rigidity of the device itself and the support strength for the support member can be more effectively ensured, and the space left in the corner is also provided. It is another object of the present invention to provide an electric junction box having a novel structure that can be efficiently arranged.

A first aspect of the present invention relating to an electrical junction box includes a case main body that houses an electric circuit and a cover member that covers the case main body, and the case main body includes a base member and a central portion of the base member. with a divided structure composed fitted into is block, the base member includes a rectangular base portion having a longitudinal rectangular shape, toward the outer side at one long side portion of Teso to the rectangular base triangle The triangular protruding portion protruding in a shape, and the protruding length of the triangular protruding portion from the rectangular base portion is larger than the length of the short side portion of the rectangular base portion, while the block member Is provided with a polygonal outer peripheral surface including a pair of oblique sides constituting a part of the pair of oblique sides of the triangular protrusion of the base member, and the pair of oblique surfaces of the block. A bolt fixing portion of an external electric wire connected to the electric circuit is provided with respect to a portion, and when the external electric wire is bolted to the bolt fixing portion, a polygonal shape is formed by a rotational force accompanying the bolt fixing. The outer peripheral surface of the block is configured to come into contact with the base member at a plurality of locations, and is attached to the support member by an attachment portion provided on the outer peripheral surface of the other long side portion of the rectangular base portion. It is characterized by being attached.

  According to the present invention, since the triangular protrusion is formed so as to protrude from the rectangular base portion, the distance from the outer peripheral wall of the central portion of the electrical junction box is set to be shorter than that of the conventional substantially rectangular shape. I can do it. Thereby, the reinforcement effect by an outer peripheral wall is exhibited efficiently, and the rigidity of the bottom plate center part itself and the support strength with respect to an attachment part can be set more largely.

  In addition, since it has a triangular protrusion, it can be installed with excellent space efficiency, for example, in a triangular corner-shaped empty space at the corner of the engine room, and other members are arranged around the triangular protrusion. Space can be secured. Furthermore, the weight can be reduced by reducing the overall size. In particular, the projecting length of the triangular projecting portion from the rectangular base portion is made larger than the length of the short side portion of the rectangular base portion, thereby further improving the space efficiency.

  In addition, by providing a rectangular base part, even if it is an elongated connector or fuse, the mounting direction can be reduced by setting the length direction to the length direction of the long side of the rectangular base part. It can be secured sufficiently.

Oite the first state like the present invention, the attachment portion is a mode in which is provided on the outer peripheral surface at the other long side portion of the rectangular base section is employed. If it does in this way, a triangular projection part will be formed in the position away from the attachment part. Therefore, the mass protruding from the mounting portion can be set smaller than that of a conventional substantially square shape. Therefore, it is possible to ensure a sufficiently large support strength for a support member such as a vehicle body.

Oite the first state like the present invention, the bolt fixing part for connecting an external wiring for a pair of oblique sides of the triangular projecting portion is provided respectively. Thus, it is possible to form the bolt fixing portion for external wiring connection space efficiently, by disposing distributed in different oblique sides of the connection portion of the plurality of external wiring, each external It is possible to easily identify the wiring attachment portion and reduce the possibility of erroneous connection of external wiring.

According to a second aspect of the present invention, in the first aspect, an electrical component having a rectangular block shape has one of its apexes at the apex of the triangular protrusion at the tip of the triangular protrusion. It is attached so as to match. In this way, it is possible to efficiently use the tip portion of the triangular protrusion and to arrange a relatively large electric component having a rectangular block shape such as a relay in a space efficient manner.

According to a third aspect of the present invention, in the first or second aspect, the rectangular base portion has an electrical component having a longitudinal shape whose longitudinal direction is the length of the long side of the rectangular base portion. It is attached toward the direction. In this way, it is possible to secure a sufficient space for arranging electrical parts having a longitudinal shape such as a multi-fusible link and a multi-terminal connector.

  According to the present invention, by forming the triangular protrusion that protrudes in a triangular shape from the rectangular base portion, the separation distance from the outer peripheral wall of the central portion in the electric connection box is set short, and the rigidity of the electric connection box itself Support strength for the support member can be ensured. Further, the triangular protrusions can be disposed with excellent space efficiency in a triangular corner space or the like.

The disassembled perspective view of the electrical-connection box as one Embodiment of this invention. The top view of the case main body which comprises the electrical-connection box shown in FIG. The disassembled perspective view of the case main body 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 has a structure in which a cover member 14 is fitted to a case body 12.

  2 shows a top view of the case main body 12 and FIG. 3 shows an exploded perspective view of the case main body 12. FIG. 3 is a rear view, and the upper side in the drawing is the vertical lower side. As shown in FIG. 3, the case main body 12 is a divided structure formed by inserting a block 18 into a base member 16.

  The base member 16 is formed of a synthetic resin, and has a rectangular base portion 20 having a substantially longitudinal rectangular shape, and a triangular protrusion protruding from the one long side portion 22a of the rectangular base portion 20 to the outer peripheral side of the base member 16 in a triangular shape. As a whole, a block shape having a substantially pentagonal shape is formed. The protruding length L1 of the triangular protruding portion 24 from the long side portion 22a is larger than the length L2 of the short side portion 26 in the rectangular base portion 20.

  The triangular protrusion 24 has hypotenuses 28a and 28b as a pair of sides corresponding to the hypotenuse of the triangle, and has a tip 30 to which the pair of hypotenuses 28a and 28b is connected at the apex of the triangle. The pair of oblique sides 28 a, 28 b extend from both ends of one long side 22 a of the rectangular base portion 20, and gradually approach evenly as they protrude from the rectangular base portion 20. Thereby, the triangular protrusion part 24 in this embodiment is made into the substantially right-angled isosceles triangle shape where the oblique sides 28a and 28b cross | intersect substantially perpendicularly.

  A base outer peripheral wall 32 is formed on the outer periphery of the bottom plate 31 of the base member 16 over substantially the entire periphery. A pair of attachment portions 34, 34 are formed on the outer surface of the base outer peripheral wall 32 in the long side portion 22b, and are electrically connected to a support member such as a vehicle body panel provided on the vehicle body by the attachment portions 34, 34. A box 10 is attached. Further, the center side sandwiched between the pair of mounting portions 34, 34 on the outer surface of the base outer peripheral wall 32 in the long side portion 22b and the outer surface of the base outer peripheral wall 32 in the distal end portion 30 have a cover side, which will be described later. A main body side lock portion 36 that engages with the lock portion 74 is formed.

  Further, in the base member 16, a cutout portion 38 is formed in the middle portion of each of the oblique sides 28 a and 28 b so as to be concave and open to the outer peripheral side as the base outer peripheral wall 32 and the bottom plate 31 are cut out. . In addition, the lower side (lower side in FIG. 1) of the bottom plate 31 in the base outer peripheral wall 32 is cut out by a cutout portion 38, and the cutout portion 38 is discontinuous in the circumferential direction of the base member 16. Has been. On the other hand, the upper side (upper side in FIG. 1) of the base outer peripheral wall 32 of the base outer peripheral wall 32 is a concave part 39 extending along the outer peripheral edge of the notch 38, and is continuous over the entire circumference of the base member 16. Yes.

  In addition, a fusible link attachment portion 42 as an electric component mounting portion to which the multi-fusible link 40 as an electric component is attached is provided at a substantially central portion of the rectangular base portion 20. As shown in FIG. 1, the multi-fusible link 40 has a longitudinal shape, and the fusible link mounting portion 42 has a longitudinal direction of the multi-fusible link 40 along the length direction of the long side portions 22a and 22b. It comes to be installed. Furthermore, two end portions of the rectangular base portion 20 in the length direction are provided with two fuse attachment portions 44 as electrical component mounting portions to which fuses as electrical components are attached. These two fuse mounting portions 44 are arranged in the length direction of the short side portion 26.

  On the other hand, the distal end portion 30 is provided with a relay attachment portion 48 as an electric component mounting portion to which a relay 46 as an electric component is attached. As shown in FIG. 1, the relay 46 has a relatively large rectangular block shape, and the relay mounting portion 48 is formed to be inclined with respect to the length direction of the rectangular base portion 20. The relay 46 is mounted on the relay mounting portion 48 so that its two adjacent surfaces are along the extending direction of the oblique sides 28a and 28b, and the vertex 50 is aligned with the vertex 52 of the triangular protrusion 24. It has become so.

  A block 18 is fitted into the central portion of the base member 16 from below vertically (upward in FIG. 3). The block 18 is formed of a synthetic resin and has a substantially isosceles trapezoid shape as a whole. In each of the oblique sides 53a and 53b corresponding to two non-parallel sides of the isosceles trapezoid in the block 18, one or two nut mounting portions 55 are provided at positions corresponding to the cutout portions 38 when fitted to the base member 16. Is formed. Each of these nut mounting portions 55 has a polygonal nut mounting hole that opens vertically upward, and a fastening nut for connecting an electric wire, which will be described later, is fitted into the nut mounting hole.

  Furthermore, an inward projecting wall portion 54 is formed in each of the oblique sides 53a and 53b of the block 18 so as to swell toward the inner peripheral side and project downward (in FIG. 3, upward). The inward protruding wall portion 54 has a substantially semi-cylindrical shape or a substantially semi-elliptical cylindrical shape. The block 18 has a hook shape that opens to the outer peripheral side of the block 18 by the inner peripheral surface of the inner protruding wall portion 54. A concave curved surface 56 extending downward is formed. Each inward protruding wall portion 54 protrudes from the bottom wall portion of the nut mounting portion 55 provided in the block 18, and both end portions in the circumferential direction of each inward protruding wall portion are nut mounting portions. It extends to the outer peripheral side of 55 and is curved in an arc shape. Thereby, each inwardly projecting wall portion 54 is a reinforcing rib that exerts a reinforcing action on each nut mounting portion 55.

  As shown in FIG. 2, connection plates 58 a and 58 b made of thick metal plates are assembled on the upper surface of the block 18 so as to overlap each other. The connection plates 58a and 58b are fitted and positioned between the overlapping surfaces of the block 18 and the base member 16, but may be fixed by press-fitting or bolts.

  Such a block 18 is fitted into the central portion of the base member 16 from below, and is fixed to the base member 16 by lock portions 60 provided at a plurality of locations on the outer peripheral surface, whereby the case main body 12 is formed. Has been. In this assembled state, the inwardly projecting wall portion 54 of the block 18 is positioned at the opening portion of the cutout portion 38 of the base member 16. Thereby, the outer peripheral wall 61 of the case body 12 is configured by the base outer peripheral wall 32 of the base member 16 and the inwardly protruding wall portion 54 of the block 18, and the protruding portion of the outer peripheral wall 61 downward from the bottom plate 31 is The base outer peripheral wall 32 and the inward protruding wall portion 54 are continuously formed over the entire periphery of the case main body 12.

  Further, a part of the connection plates 58 a and 58 b assembled to the block 18 is exposed above the case body 12 through the notch 38 of the base member 16, thereby forming a bolt fixing portion 62. The bolt fixing portion 62 is opened to the outside of the case body 12 by the concave portion 39 of the base member 16. In addition, the bolt fixing portion 62 is located at a substantially intermediate portion of each of the oblique sides 28 a and 28 b between the relay attachment portion 48 and the fusible link attachment portion 42 in the case body 12. In the present embodiment, two bolt fixing portions 62 are provided on one oblique side portion 28a, while one bolt fixing portion 62 is provided on the other oblique side portion 28b.

  In short, two bolt insertion holes 63a and 63a are formed in the connection plate 58a disposed on one oblique side portion 28a of the case body 12, and the connection plate 58b disposed on the other oblique side portion 28b includes One bolt insertion hole 63b is formed. The nut mounting holes of the nut mounting portion 55 of the block 18 are opened at positions corresponding to the bolt insertion holes 63a, 63a, 63b, respectively. Then, the electric wire 68a as the external wiring connected to the alternator and the electric wire 68b as the external wiring connected to the fuse box are overlaid on the connection plate 58a with the terminals provided at the respective ends, and a connection bolt (not shown) It is tightened with continuity. In addition, an electric wire 68c as an external wiring connected to the battery has a terminal provided at its end overlapped with the connection plate 58b, and is tightened with a connection bolt (not shown) to be conducted. The connection bolts inserted into the terminals of the electric wires 68a, 68b, 68c are inserted into the bolt insertion holes 63a, 63a, 63b, and are attached to the tightening nuts attached to the nut attachment portions 55, 55, 55. It is screwed and tightened.

  Further, a through hole 64 that penetrates the bottom plate 31 is formed in the central portion of the base member 16. The through hole 64 has a substantially rectangular shape extending in the length direction of the long side of the rectangular base portion 20. A central portion on the lower bottom side of the block 18 is exposed above the case body 12 through the through hole 64, whereby a MIDI fuse mounting portion 66 is formed. Connection plates 58a and 58b are exposed at both ends of the MIDI fuse mounting portion 66, and bolt insertion holes 67a and 67b are formed there. The block 18 is formed with nut mounting portions 69 and 69 having nut mounting holes that open to positions corresponding to the bolt insertion holes 67a and 67b. A clamping nut is fitted. The MIDI fuse 72 is fitted into the MIDI fuse mounting portion 66, and the terminals provided at both ends thereof are electrically connected to the connection plates 58 a and 58 b by the connection bolts 71 and 71. As a result, the connection plates 58 a and 58 b on both sides are conducted through the MIDI fuse 72. The connection bolts 71 and 71 inserted into the terminals of the MIDI fuse 72 are inserted into the bolt insertion holes 67a and 67b, screwed into the respective fastening nuts attached to the nut attachment portions 69 and 69, and tightened. It has been.

  Furthermore, the base member 16 is formed with a rectangular window 73 penetrating the bottom plate 31 and located on the opposite side of the fuse mounting portion 44 in the length direction of the rectangular base portion 20. A part of the plate 58a is exposed. Further, the connection plate 58a is formed with a bolt insertion hole 76 located in the rectangular window 73, and a nut mounted with a tightening nut is installed at a position on the block 18 corresponding to the bolt insertion hole 76. A nut mounting portion 78 having a hole is formed. The input terminal 80 of the multi-fusible link 40 attached to the fusible link mounting portion 42 is superimposed on the connection plate 58a exposed to the rectangular window 73, and the connection bolt 82 inserted through the input terminal 80. Is screwed into the tightening nut mounted on the nut mounting portion 78 through the bolt insertion hole 76, thereby being tightened and connected to the connection plate 58a. Thereby, the electric power input to the connection plate 58b through the electric wire 68c is fed from the input terminal 80 to the multi-fusible link 40 through the MIDI fuse 72 and the connection plate 58a.

  The relay 46 is attached to the relay mounting portion 48 of the case main body 12 with its terminals inserted, and each fuse mounting portion 44 is attached with a fuse (not shown) with its terminals inserted. Yes. Although not shown, wiring as an external electric wire extends from the connector portion into which each terminal of the relay 46 and the fuse is inserted, and a plurality of wirings extending from the multi-fusible link 40 are provided. At the same time, it is appropriately bundled and pulled out below the case body 12.

  Furthermore, the cover member 14 is fitted to the case body 12 in which the multi-fusible link 40, the relay 46, the electric wire 68, the MIDI fuse 72, and the like are mounted to form an electric circuit. The cover member 14 has a substantially pentagonal shape as a whole corresponding to the outer shape of the case body 12. The cover member 14 is formed with a cover side lock portion 74 at a position corresponding to the main body side lock portion 36 of the case main body 12, and these cover side lock portions 74 are engaged with the main body side lock portion 36. The cover member 14 is fitted into the case main body 12. Thereby, the multi-fusible link 40 attached to the case main body 12, the relay 46, the connection terminal 70 of the electric wire 68, etc. are covered with the cover member 14. In the present embodiment, the main body side lock portion 36 and the cover side lock portion 74 are located at the central portion of the apex 52 of the triangular protrusion 24 and the long side portion 22b of the rectangular base portion 20. By fixing the cover member 14 at two points on the line, the cover state by the cover member 14 can be stably maintained.

  According to the electrical junction box 10 having such a structure, the oblique sides 28a and 28b of the triangular protrusion 24 approach the central portion of the case main body 12, and therefore, compared with the conventional substantially rectangular electrical junction box. And the separation distance from the outer peripheral wall 61 of the center part of the baseplate 31 in the case main body 12 can be made small. Thereby, the reinforcement effect by the outer peripheral wall 61 can be exhibited effectively, and the rigidity of the center part of the bottom plate 31 itself and the support strength with respect to the attachment part 34 can be set larger.

  Moreover, the triangular protrusion part 24 protrudes so that it may space apart with respect to the long side part 22b from the long side part 22a on the opposite side to the long side part 22b in which the attachment part 34 was provided in the rectangular base part 20. Therefore, the mass projecting from the mounting portion 34 can be made smaller than that of the conventional substantially square shape, and the support strength for the vehicle can be secured sufficiently high.

  The provision of the triangular protrusion 24 makes it possible to dispose the electrical junction box 10 in a triangular corner-shaped empty space, and the triangular protrusion 24 as compared with the conventional substantially rectangular shape. It is possible to secure a larger space for disposing other members around the. In particular, since the protruding length L1 of the triangular protruding portion 24 is larger than the length L2 of the short side portion 26 in the rectangular base portion 20, further improvement in space efficiency is achieved. At the same time, the weight can be reduced by reducing the total space.

  In addition, the attachment portion 34 that is an attachment portion to the vehicle is provided on the long side portion 22b, and the bolt fixing portions 62 are provided on the pair of oblique side portions 28a and 28b, so that each side portion of the electrical connection box 10 is provided. It can be used effectively to obtain better space efficiency. In particular, since the electric wire 68 extended from the bolt fixing portion 62 is disposed in the concave curved surface 56 without projecting from the electrical junction box 10 in a top view, a more excellent space efficiency is ensured. At the same time, the possibility of damage to the electric wires 68 is reduced.

  The multi-fusible link 40 and the relay 46 fixed by inserting a terminal are attached to the base member 16, while the connection terminal 70 and the MIDI fuse 72 of the electric wire 68 to be bolted are separated from the base member 16. It is designed to be mounted on the formed block 18. In particular, since the outer peripheral surface of the block 18 has a polygonal shape and is assembled to the base member 16, when the rotational force accompanying the bolt fixing is exerted on the block 18, the outer peripheral surface of the block 18 has a plurality of base members. The rotational reaction force exerted on the block member 18 from the base member 16 is distributed to the plurality of contact portions. Therefore, the stress acting on the base member 16 and the block 18 is dispersed, and the strength of the case main body 12 with respect to bolt fixing is more effectively ensured. Further, since the bolt fixing portion 62 is positioned at the intermediate portion between the oblique sides 28a and 28b, a sufficient space for the bolt fixing portion 62 can be secured.

  In addition, the multi-fusible link 40 having a longitudinal shape is disposed in the rectangular base portion 20 along the long side direction of the rectangular base portion 20, and the relay 46 having a relatively large rectangular block shape is connected to the triangular protruding portion 24. Since the two large-sized members 40 and 46 can be disposed with excellent space efficiency by being inclined at the front end portion, the case body 12 can be further downsized. . The multi-fusible link 40 and the relay 46 are disposed on both sides of the case body 12 as far as possible from each other, so that both the members 40 and 46 are disposed in a compact space. It is possible to improve the ease of attaching / detaching and the heat dissipation effect.

  As mentioned above, although one Embodiment of this invention was described, this is an illustration to the last, Comprising: This invention is not limited at all by the specific description in the said embodiment. For example, the apex of the triangular protrusion may be an appropriate acute angle or obtuse angle as well as a right angle. Further, the triangular protrusion is not limited to an isosceles triangle shape, and the lengths of both oblique sides may be different from each other, and the top of the triangular protrusion may be offset from the center line of the electrical junction box. good. Furthermore, the hypotenuse part is not limited to a linear shape, and for example, it is also possible to form a hypotenuse part by forming the hypotenuse part of the triangular projecting part with a curved line.

  Furthermore, in the above-described embodiment, the case main body 12 is a divided structure including the base member 16 and the block 18, but the case main body 12 may be an integrally molded product.

  Moreover, the electrical component arrange | positioned at a rectangular base part and a triangular protrusion part is not specifically limited. For example, in the above-described embodiment, a plurality of the fuse attachment portions 44 may be arranged on the rectangular base portion 20.

10: Electrical junction box, 12: Case body, 20: Rectangular base, 22a, b: Long side, 24: Triangular protrusion, 26: Short side, 28a, b: Slanted side (side), 30: Tip portion, 34: mounting portion, 40: multi-fusible link (electrical component), 46: relay (electrical component), 50: vertex (relay), 52: vertex (triangular protrusion), 61: outer peripheral wall, 62: Bolt fixing part, 68: Electric wire (external wiring), 70: Connection terminal

Claims (3)

A case main body for housing the electric circuit and a cover member for covering the case main body;
The case body is a divided structure composed of a base member and a block that is fitted into a central portion of the base member, and
Wherein the base member includes a rectangular base portion having a longitudinal rectangular shape, it is constituted by a triangular projection projecting in a triangular shape toward the outer circumferential side at one long side portion of Teso to the rectangular base portion, While the protruding length of the triangular protruding portion from the rectangular base portion is larger than the length of the short side portion of the rectangular base portion ,
The block member includes a polygonal outer peripheral surface including a pair of oblique sides forming a part of the pair of oblique sides of the triangular protrusion of the base member, and the pair of oblique sides of the block On the other hand, a bolt fixing portion of an external electric wire connected to the electric circuit is provided,
When the external electric wire is bolted to the bolt fixing portion, the outer peripheral surface of the polygonal block comes into contact with the base member at a plurality of locations by the rotational force accompanying the bolt fixing. With
An electrical junction box attached to a support member by an attachment portion provided on an outer peripheral surface of the other long side portion of the rectangular base portion . The electrical junction box according to claim 1, wherein an electrical component having a rectangular block shape is attached to a tip portion of the triangular protrusion so that one of the apexes thereof is aligned with the apex of the triangular protrusion. 3. The electrical junction box according to claim 1, wherein an electrical component having a longitudinal shape is mounted on the rectangular base portion with a longitudinal direction thereof oriented in a length direction of a long side of the rectangular base portion.

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