JP6412728B2 - Electrical junction box - Google Patents

Description

  The present invention relates to an electric junction box for automobiles.

  FIG. 8 shows an electric junction box of a reference example designed by the present inventor. The electrical junction box 301 includes a case main body 2 provided with an electronic component mounting surface 80 at an upper portion, an upper cover 303 assembled to the case main body 2 in a direction facing the electronic component mounting surface 80, the inside of the case main body 2 and And a plurality of components attached to the electronic component attachment surface 80. On the electronic component mounting surface 80, relay mounting portions 81 and 82 to which plug-in type relays 11 and 12 are mounted, fuse mounting portions 83 to which plug-in type fuses are mounted, and connector fitting to which connectors are fitted. A portion 84 and the like are provided.

  The relays 11 and 12 and the fuse described above are mounted on the electronic component mounting surface 80 that allows easy component replacement by simply removing the upper cover 303 in consideration of workability during maintenance. However, in this component layout, the relays 11 and 12 having a height and the fuse having no height are arranged on the same surface, and therefore, the gap between the fuse having no height and the upper cover 303 (the fuse mounting portion 83). There is a problem that a dead space is generated in the upper part).

  As a prior art document of the present application, Patent Document 1 discloses a relay on the upper surface of the case body in order to enable detection of half-fitting of the relay while effectively utilizing the gap between the case body and the upper cover. An electrical junction box is disclosed in which a spare fuse is housed in a position facing the relay of an upper cover that is mounted on the case body.

Japanese Patent Laid-Open No. 2005-185009

  The present invention has been made in view of the above problems, and provides an electrical junction box that can reduce dead space in an electrical junction box in which a plurality of electronic components having different heights are attached to an electronic component mounting surface of a case body. For the purpose.

The invention described in claim 1 is an electrical junction box comprising: a case body provided with an electronic component mounting surface; and a cover assembled to the case body in a direction facing the electronic component mounting surface. A plurality of electronic components having different heights are attached to the electronic component mounting surface, and a component to which an electric wire is attached is attached to the inner surface of the cover, and the component is the highest among the plurality of electronic components. Is disposed so as to avoid the electronic component, and the cover is provided with an opposing wall facing the electronic component mounting surface of the case body, and a peripheral wall erected from an outer edge of the opposing wall, The opposing wall is provided with a rail extending in a direction orthogonal to the opposing direction to the electronic component mounting surface, and the component is provided with an insertion portion that slides in the orthogonal direction within the rail. The rail, and opened to the electronic component mounting surface side, the insertion portion is an opening portion is provided to be inserted into the rails, that the wire between the component and the opposing wall is laid An electrical junction box characterized by

  According to a second aspect of the present invention, in the first aspect of the present invention, the component includes an electronic component to which an electric wire is electrically connected and a holder that accommodates the electronic component. The electronic component can be inserted into and removed from the holder in a state of being attached to the cover.

According to the invention described in claim 1, a plurality of electronic components having different heights are attached to the electronic component attachment surface, and a component with an electric wire attached is attached to the inner surface of the cover. Since the component is arranged so as to avoid the tallest electronic component among the plurality of electronic components, the space between the electronic component mounting surface and the cover can be used effectively, and dead space It is possible to provide an electrical junction box that can reduce the number of electrical connections. Further, the rigidity of the cover can be increased.
Further, the cover is provided with an opposing wall facing the electronic component mounting surface of the case body, and a peripheral wall erected from an outer edge of the opposing wall, and the opposing wall is provided with the electronic component mounting surface. A rail extending in a direction orthogonal to the facing direction is provided, and the component is provided with an insertion portion that slides in the direction orthogonal to the inside of the rail, and the rail opens to the electronic component mounting surface side, Since the insertion portion is provided with an opening for insertion into the rail, and the wire is routed between the component and the opposing wall, the insertion portion is brought close to the component in a direction perpendicular to the opposing wall. Is inserted into the rail through the opening, and then the component is slid along the rail, so that the component can be attached to the cover without hitting the peripheral wall.

  According to the invention described in claim 2, the component includes an electronic component to which an electric wire is electrically connected and a holder that accommodates the electronic component, and the holder is attached to the cover. Since the electronic component can be inserted into and removed from the holder, the electronic component can be easily replaced.

It is a perspective view of the electrical connection box of a reference example . It is a perspective view which shows the state which removed the cover shown by FIG. 1 from the case main body. FIG. 3 is an exploded view of the cover and parts shown in FIG. 2. It is explanatory drawing explaining the method to attach components to the cover shown by FIG. It is a figure which shows the cover and components which comprise the electrical junction box concerning one Embodiment of this invention, and is explanatory drawing explaining the method of attaching the said components to the said cover. It is a figure which shows the state which inserted the insertion part of the components shown by FIG. 5 in the rail from the opening part. It is a figure which shows the state which slid the component shown by FIG. 6 and latched this component to the rail. It is a perspective view of the electrical connection box of a reference example.

The “electric connection box” of the reference example will be described with reference to FIGS.

  The electrical junction box 1 shown in FIGS. 1 to 3 is mounted on an automobile and distributes power from a power source to a load. The electrical junction box 1 includes a case main body 2 provided with an electronic component mounting surface 80, and an upper cover 3 assembled to the case main body 2 in a direction facing the electronic component mounting surface 80 (corresponding to "cover" in claims). And a plurality of components attached to the case main body 2 and a plurality of components 4 to 7 attached to the inner surface of the upper cover 3.

  The case body 2 is formed by assembling a synthetic resin inner cover 8 and a synthetic resin outer cover 9. The inner cover 8 is formed in a rectangular parallelepiped shape, and a substrate or the like is accommodated therein. The electronic component mounting surface 80 is constituted by the upper surface of the inner cover 8. The outer cover 9 is formed in a box shape that can accommodate the inner cover 8. Further, the outer cover 9 is formed in a box shape having a depth about twice the height of the inner cover 8. The upper cover 3 is assembled so as to cover the opening at the upper end of the outer cover 9.

  On the electronic component mounting surface 80, relay mounting portions 81 and 82 to which plug-in type relays 11 and 12 are mounted, fuse mounting portions 83 to which plug-in type fuses are mounted, and connector fitting to which connectors are fitted. A portion 84 and the like are provided. The relay mounting portions 81 and 82 are provided in the center of the electronic component mounting surface 80. A plurality of fuse mounting portions 83 are provided on both sides of the relay mounting portions 81 and 82.

  Among the plurality of electronic components attached to the electronic component attachment surface 80, the electronic component having the highest height (projecting toward the upper cover 3) is the relay 11 attached to the relay mounting portion 81. The electronic component having the lowest height is a fuse attached to the fuse mounting portion 83. As described above, a plurality of electronic components having different heights are attached to the electronic component attachment surface 80. The relays 11 and 12 and the fuse described above are mounted on the electronic component mounting surface 80 that allows easy replacement of components by simply removing the upper cover 3 in consideration of workability during maintenance.

  The upper cover 3 is made of a synthetic resin, and is mainly made up of a rectangular facing wall 30 that faces the electronic component mounting surface 80 and a peripheral wall 31 that stands up from the outer edge of the facing wall 30. Rails 32, 35, and 36 for attaching the components 4 to 7 are provided on the inner surface of the facing wall 30.

  Subsequently, the components 4 to 7 will be described. The component 4 (corresponding to “component” in claim 2) is a relay unit, and two relays 13 to which an electric wire 14 (see FIG. 4) is electrically connected, and a synthetic resin containing these relays 13. And a holder 40 made of metal. The component 5 (corresponding to “component” in claim 2) is a fuse unit, and is composed of a plurality of fuses to which electric wires are electrically connected, and a synthetic resin holder 50 accommodating these fuses. Yes. The component 6 is a connector fitting portion into which a connector is fitted, and includes a terminal to which an electric wire is electrically connected and a housing that accommodates the terminal. The component 7 is semiconductor power integration, and includes a substrate on which electric wires are electrically connected and a semiconductor or the like is mounted, and a housing that accommodates the substrate. In this way, the parts 4 to 7 are parts to which an electric wire is attached and constitute an electric circuit of the automobile. In addition, in FIGS. 1-3, illustration of the electric wire attached to each components 4-7 is abbreviate | omitted.

  The parts 4 to 7 described above are attached to the inner surface of the upper cover 3 by rails 32, 35 and 36. Moreover, these components 4-7 are arrange | positioned so that the relay 11 with the highest height among several electronic components attached to the electronic component attachment surface 80 may be avoided. Specifically, the relay unit 4 and the semiconductor power integration 7 are arranged above a plurality of fuses attached to the fuse mounting portion 83. Further, the fuse unit 5 is disposed between two connector fitting portions 84 that are disposed with a space therebetween. The connector fitting part 6 is disposed above the connector fitting part 84.

  As described above, in the electrical junction box 1, a plurality of electronic components having different heights are attached to the electronic component attachment surface 80, and the components 4 to 7 are attached to the inner surface of the upper cover 3 and the components 4 to 7 are raised. Since it is arranged in the space on both sides of the thick relay 11, the dead space can be reduced. Further, by providing the rails 32, 35, and 36 for attaching the components 4 to 7 to the upper cover 3, and attaching the components 4 to 7 to the upper cover 3, the rigidity of the upper cover 3 can be increased. it can.

  Furthermore, in the relay unit 4 described above, the relay 13 can be inserted into and removed from the holder 40 in a state where the holder 40 is attached to the upper cover 3. Similarly, in the fuse unit 5, the fuse can be inserted into and removed from the holder 50 in a state where the holder 50 is attached to the upper cover 3. Therefore, the relay 13 and the fuse can be easily replaced only by removing the upper cover 3.

Next, a mounting structure between the components 4 to 7 and the upper cover 3 will be described. In this example , the mounting structures of the components 4 to 7 and the upper cover 3 are the same, so the mounting structure of the components 4 and the upper cover 3 will be described with reference to FIG.

  As shown in FIG. 4, a pair of rails 32 are provided on the inner surface of the facing wall 30 of the upper cover 3 in order to attach the component 4, that is, the relay unit 4. The pair of rails 32 extends in parallel to a direction orthogonal to the facing direction between the facing wall 30 and the electronic component mounting surface 80 and extends from one end side in the short direction of the facing wall 30 to the center side. Further, the pair of rails 32 are formed in a square cylinder shape, and have an opening 32a that opens to one end in the short direction of the opposing wall 30 and extends from the opening 32a to the center in the short direction of the opposing wall 30. A slit 32b and a locking hole 33 for locking a locking projection 43 to be described later are provided.

  The holder 40 of the relay unit 4 is provided with a box-shaped holder main body 41, insertion portions 42 provided on both side surfaces of the holder main body 41, and sliding projections 43 provided on the respective insertion portions 42. And have. On the bottom surface of the holder main body 41, an insertion hole for inserting the electric wire 14 and a terminal connected to the end of the electric wire 14 is provided. The relay 13 is inserted from the opening on the side opposite to the bottom surface of the holder main body 41. Further, the insertion portion 42 is provided at the end portion on the bottom surface side on both side surfaces of the holder main body 41.

  The relay unit 4 is slid in the direction of arrow A in FIG. 4 in a state where the relay 13 and the terminal-attached electric wire 14 are accommodated in the holder 40 described above, whereby each insertion portion 42 is opened from the opening 32 a to the inside of each rail 32. Inserted into. And when each insertion part 42 is positioned in the innermost part of each rail 32, each latching protrusion 43 latches to each latching hole 33, and is fixed to the upper cover 3.

An “electric connection box” according to an embodiment of the present invention will be described with reference to FIGS. 5-7, the same code | symbol is attached | subjected to the same component as the reference example of FIGS. 1-4 mentioned above, and description is abbreviate | omitted.

Electrical connection box according to the present embodiment, comprises a component 104, which is a partial modification of the component 4 described as a reference example, the upper cover 103 to the rail 32 of the upper cover 3 described partially modified as a reference example, the Yes. The other configuration is the same as that of the reference example of FIGS.

In the above-described reference example , when the component 4, that is, the relay unit 4 is attached to the upper cover 3, the electric wire 14 led out from the bottom surface of the holder body 41 hits the peripheral wall 31 of the upper cover 3 and has a disadvantage that it is difficult to work. . Therefore, in order to eliminate this inconvenience, the electrical junction box of the present embodiment is obtained by changing a part of the component 4 and a part of the upper cover 3.

As shown in FIG. 5, a pair of rails 132 is provided on the inner surface of the facing wall 30 of the upper cover 103 in order to attach the component 104, that is, the relay unit 104. In addition to the configuration of the rail 32 described in the reference example , the pair of rails 132 is provided with an opening 32c that opens to the electronic component mounting surface 80 side. The opening 32 c is provided at the center in the longitudinal direction of the rail 132, and is provided at a position farther from the opening 32 a than the locking hole 33.

The holder 140 of the relay unit 104 is provided on both side surfaces of the holder body 41, and the first insertion portion 44 (corresponding to the “insertion portion” in claim 1 ) and the second insertion portion 45 that slide in the rail 132. And a locking projection 43 provided on each second insertion portion 45. The 1st insertion part 44 and the 2nd insertion part 45 are the same structures as what remove | eliminated the sliding direction center part of the insertion part 42 demonstrated in the reference example .

  The relay unit 104 is brought close to the upper cover 3 along the arrow B direction in FIG. 5 in a state where the relay 13 and the terminal-attached electric wire 14 are accommodated in the holder 140 described above, whereby each first insertion portion 44 is opened. It inserts in each rail 132 from the part 32c. Subsequently, when the relay unit 104 is slid in the direction of arrow C in FIG. 6, each second insertion portion 45 is inserted into each rail 132 from the opening 32 a, and each first insertion portion 44 is Positioned at the innermost position of the rail 132, each locking projection 43 is fixed to the upper cover 103 by being locked in each locking hole 33. In this state, the electric wire 14 led out from the bottom surface of the holder body 41 is routed between the relay unit 104 and the facing wall 30 as shown in FIG.

  In the present embodiment, when the relay unit 104 is attached to the upper cover 103, the holder 140 and the electric wire 14 can be easily attached without hitting the peripheral wall 31 of the upper cover 103.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

1 Electrical junction box 2 Case body 3,103 Upper cover (cover)
4,104 Relay unit (parts)
5 Fuse unit (parts)
6 Connector fitting part (parts)
7 Semiconductor power integration (parts)
11,12 Relay (electronic parts)
80 Electronic component mounting surface

Claims (2)

In an electrical junction box comprising a case main body provided with an electronic component mounting surface, and a cover assembled to the case main body in a direction facing the electronic component mounting surface,
A plurality of electronic components having different heights are attached to the electronic component mounting surface,
A part to which an electric wire is attached is attached to the inner surface of the cover, and the part is arranged so as to avoid the highest electronic part among the plurality of electronic parts ,
The cover is provided with an opposing wall facing the electronic component mounting surface of the case body, and a peripheral wall erected from an outer edge of the opposing wall,
A rail extending in a direction orthogonal to the facing direction to the electronic component mounting surface is provided on the facing wall,
The part is provided with an insertion portion that slides in the orthogonal direction in the rail,
The rail is provided with an opening that opens on the electronic component mounting surface side, and the insertion portion is inserted into the rail.
The electric junction box , wherein the electric wire is routed between the component and the opposing wall . The component is composed of an electronic component to which an electric wire is electrically connected, and a holder that accommodates the electronic component,
The electrical junction box according to claim 1, wherein the electronic component can be inserted into and removed from the holder in a state where the holder is attached to the cover.

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