JP6349160B2 - Electrical junction box - Google Patents

Description

  The present invention relates to an electrical junction box.

  Conventionally, an electrical connection box that is mounted on a vehicle such as an automobile and collects various electronic component modules such as connection processing parts such as wire harnesses and electrical components such as fuses, relays, and electronic control units. A junction box, a fuse box, a relay box, etc. are also known (see, for example, Patent Document 1).

JP 2013-198347 A

  In the conventional electric junction box, it is necessary to provide a drainage path for discharging the water that has entered inside, but there is a need to reduce the space for this drainage path.

  This invention is made | formed in view of the above, Comprising: It aims at providing the electrical junction box which can ensure drainage and can implement | achieve space saving.

In order to solve the above problems, an electrical junction box according to the present invention is formed in a cylindrical shape having openings on the upper side and the lower side during installation, and a frame that houses electronic components therein, and the upper side of the frame An upper cover that closes the opening on the side, a lower cover that closes the opening on the lower side of the frame, and a group of electric wires that are attached to the peripheral wall of the frame by sliding engagement from the upper cover side and connected to the electronic component An insertion port partition that forms an insertion port to be inserted; and an inner peripheral surface of the peripheral wall of the frame provided on the lower cover side of the insertion port partition, facing the upper cover, A partition wall having an inclined surface formed by being inclined downward from the inclined surface toward the inner peripheral surface, and a water drain hole provided through the partition wall from the inclined surface to the lower cover side, Wherein the insertion opening partition body has a horizontal tubular portion extending in a direction perpendicular to the side surface of said frame, and a tilt cylinder portion formed inclined to the upper cover side from the horizontal tubular portion In the frame, the partition wall is partitioned between the inclined surface of the partition wall and the inclined surface of the inclined cylindrical portion of the insertion port partition body, enters the frame, and enters the frame from the upper cover side. further comprising wherein the Rukoto induction passage for induction into the water drain hole was water fall.

  Further, in the above electrical junction box, a locking portion for locking the joint connector is provided on the lower cover side of the partition wall, and the drain hole is used for die cutting when the locking portion is created. It is preferable that the hole is for use.

  The electrical junction box according to the present invention can provide a drainage path using the excess space on the lower side of the through-passage partitioning body, so that the drainage can be ensured and the space can be saved. .

FIG. 1 is a perspective view showing a schematic configuration of an electrical junction box according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the electrical junction box shown in FIG. FIG. 3 is an enlarged perspective view of the partition wall in FIG. 4 is a perspective view of the partition wall shown in FIG. 3 as viewed from the lower side in the vertical direction. FIG. 5 is a cross-sectional view of a region including the fourth insertion port and the partition wall of the electrical junction box.

  Hereinafter, embodiments of an electrical junction box according to the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and the description thereof will not be repeated.

[Embodiment]
With reference to FIGS. 1-5, the structure of the electrical-connection box which concerns on one Embodiment of this invention is demonstrated. FIG. 1 is a perspective view showing a schematic configuration of an electrical junction box according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the electrical junction box shown in FIG. FIG. 3 is an enlarged perspective view of the partition wall in FIG. 4 is a perspective view of the partition wall shown in FIG. 3 as viewed from the lower side in the vertical direction. FIG. 5 is a cross-sectional view taken along the line V-V in FIG. 1, and is a cross-sectional view of a region including the fourth insertion port and the partition wall of the electrical connection box. In FIG. 1, the upper cover of the electrical junction box is illustrated by a two-dot chain line.

  The electrical connection box 100 according to the present embodiment shown in FIGS. 1 and 2 is mounted on a vehicle such as an automobile, and includes connectors, fuses, relays, branching portions, and electronic control units that constitute connection processing parts such as wire harnesses and electric wires. The electrical components such as these are collected and accommodated inside. The electrical connection box 100 is installed, for example, in an engine room of a vehicle or a lower part of a vehicle body, and is connected between a power source such as a battery and various electronic devices mounted in the vehicle. The electrical junction box 100 distributes the electric power supplied from the power source to various electronic devices in the vehicle. The electrical connection box 100 may be called a junction box, a fuse box, a relay box, or the like. In the present embodiment, these are collectively called an electrical connection box.

  In the electrical junction box 100, various electronic components 102 are accommodated in an accommodation space inside the housing 101. The housing 101 includes, for example, a frame 103, an upper cover 104, a lower cover 105, and the like. The housing 101 has a three-layer divided structure in which the frame 103, the upper cover 104, and the lower cover 105 are divided. The frame 103, the upper cover 104, and the lower cover 105 are formed of an insulating synthetic resin. The frame 103 is a main member that forms a housing space in which the electronic component 102 is assembled. The frame 103 is formed in a substantially square-shaped cylindrical shape by a peripheral wall composed of a plurality of walls that are continuous with each other, and the electric connection box 100 is connected to an engine room or the like in the vertical direction (upper side). And an opening is located in the vertical direction lower side (lower side). The upper cover 104 is a lid-like member that closes the opening on the upper side in the vertical direction of the frame 103. The lower cover 105 is a dish-shaped (tray-shaped) member that closes the opening on the lower side in the vertical direction of the frame 103. The casing 101 is configured so that the opening on the upper side in the vertical direction of the frame 103 and the opening on the upper cover 104 face each other, and the opening on the lower side in the vertical direction on the frame 103 and the opening on the lower cover 105 face each other. The lower cover 105 is assembled on the lower side in the vertical direction of the frame 103. In the housing 101, the upper cover 104 and the lower cover 105 are locked to the frame 103 via various types of locking mechanisms 106. Note that the direction in which the frame 103, the upper cover 104, and the lower cover 105 are stacked is typically along the vertical direction in a state where the electrical connection box 100 is connected to an engine room or the like. Depending on the installation state of the junction box 100, the stacking direction may be installed with a predetermined angle with respect to the vertical direction.

  And as mentioned above, as various electronic components 102 assembled | attached to the accommodation space part inside this housing | casing 101, electrical components, such as a connector, a fuse, a relay, a branch part, and an electronic control unit, are contained. The electric junction box 100 has a plurality of cavities 108a formed by partition walls 107 having various shapes formed integrally with the frame 103, blocks 108 having various shapes removably assembled to the frame 103, and the like. Various electronic components 102 are assembled. In this case, the partition wall 107, the block 108, and the like are also formed of an insulating synthetic resin like the frame 103 and the like. The electrical connection box 100 is electrically connected to a cavity in which various electronic components 102 are assembled by fitting a terminal of an electric wire routed through the insertion port 109 from the lower side in the vertical direction. Is done.

  The housing 101 has a plurality of insertion openings 109. Specifically, as shown in FIGS. 1 and 2, the housing 101 has at least a first insertion port 109A, a second insertion port 109B, a third insertion port 109C, and a fourth insertion port 109D as the insertion port 109. A plurality of electric wire groups (not shown) are led out from the inside of the housing 101 through these. The first insertion port 109A, the second insertion port 109B, the third insertion port 109C, and the fourth insertion port 109D are arranged at intervals in a predetermined direction. Here, the predetermined direction is, for example, the long side direction of the housing 101, and the first insertion port 109 </ b> A, the second insertion port 109 </ b> B, the third insertion port 109 </ b> C, and the fourth insertion port 109 </ b> D are It arrange | positions at intervals with respect to the long side direction. 109A of 1st insertion holes of this embodiment are formed in the side surface by the side of the short side of the housing | casing 101, and the 2nd insertion port 109B, 109C of 3rd insertion ports, and 4th insertion port 109D are the long sides of the housing | casing 101. It is a side surface on the same side and is formed on the same side surface. The casing 101 is arranged at intervals in the order of the first insertion port 109A, the fourth insertion port 109D, the second insertion port 109B, and the third insertion port 109C from one side with respect to the long side direction. The first insertion port 109 </ b> A, the second insertion port 109 </ b> B, and the third insertion port 109 </ b> C are formed integrally with the housing 101. On the other hand, as shown in FIG. 2, the fourth insertion port 109 </ b> D is formed as a part of the insertion port partition 110 that is a separate component from the housing 101.

  In the above-described plurality of insertion openings 109 and the like, the relationship of “first, second, third, and fourth” is set for convenience and is not limited to the above. Note that the insertion port partition 110 including the fourth insertion port 109D may be generally referred to as a “rear side cover”, but in the present embodiment, the “fourth insertion port 109D” and the “insertion port partition 110”. ”To be unified. In addition, when the electrical junction box 100 is installed in the engine room of the vehicle, generally, a wire harness from the engine side is inserted into the fourth insertion portion 109D. Since the engine is generally installed after the electrical junction box 100 is installed in the engine room, the harness on the engine side is finally connected to the electrical junction box 100, and thus this wire harness is inserted. The insertion port partition 110 including the fourth insertion part 109D is also formed separately from the frame 103 and assembled last.

  As shown in FIG. 2, the insertion port partition 110 formed as a separate component from the casing 101 is vertically above the upper side surface of the peripheral wall of the frame 103 (upper cover side). By being slidably engaged with each other, the housing 101 is integrally connected to form a fourth insertion port 109D (insertion port) in the housing 101. The insertion port partition 110 includes a cylindrical portion 111 through which the electric wire group is inserted, and a substantially rectangular engagement plate 112 provided on the outer periphery of the cylindrical portion 111. On the other hand, an engagement receiving portion 116 is provided on the side surface of the long side of the frame 103 that connects the insertion port partition 110. The engagement receiving portion 116 is provided by hollowing out the peripheral wall (long side surface) of the frame 103 in a rectangular shape from the upper end in the vertical direction. The engagement plate 112 of the insertion port partition 110 is slidably engaged with the engagement receiving portion 116 of the frame 103 from above in the vertical direction, whereby the fourth insertion port 109D is connected and fixed to the frame 103.

  As shown in FIG. 5, the cylindrical portion 111 of the insertion port partition 110 extends in a direction (short-side direction) orthogonal to the side surface of the frame 103 in the outer peripheral portion of the frame 103 in a state where it is connected to the frame 103. A horizontal cylinder portion 111a, and an inclined cylinder portion 111b formed to be inclined upward in the vertical direction (upper cover 104 side) from the vicinity of the position of the engagement plate 112 to the end portion 111c on the center side of the frame 103. Have. In addition, a portion on the lower side in the vertical direction of the outer peripheral surface of the inclined cylindrical portion 111b of the cylindrical portion 111 is formed with an inclined surface 111d which is inclined downward from the end portion 111c on the center side of the frame 103 to the vicinity of the position of the engagement plate 112. Has been.

  As described above, the insertion port partition 110 is configured to be coupled to the frame 103 by slidingly engaging the engagement plate 112 with the engagement receiving portion 116 of the frame 103 from the upper side in the vertical direction. It is arranged on the upper side of the side surface of the frame 103 in the vertical direction. In the electrical junction box 100 of the present embodiment, as shown in FIGS. 2 and 5, a joint connector as a kind of electronic component 102 is provided in a surplus space below the insertion port partition 110 (fourth insertion port 109 </ b> D) in the vertical direction. 102A is arranged. The joint connector 102A is an electronic component that has an internal circuit using, for example, a copper-like punching material (bus bar) and is used to form a circuit branch in the wire group of the wire harness.

  As shown in FIG. 2, the joint connector 102A is connected to the frame 103 from below in the vertical direction. More specifically, as shown in FIG. 5, a locking portion 113 that locks the joint connector 102 </ b> A is provided on the inner peripheral side of the side wall of the frame 103 at a position vertically below the engagement receiving portion 116. It has been. The locking portion 113 is formed integrally with the frame 103 as shown in FIGS. As shown in FIG. 5, the locking portion 113 extends downward in the vertical direction from the partition wall 114 having the inclined surface 114 a disposed so as to be substantially parallel to the inclined surface 111 d of the insertion port partition 110. Has been placed. Then, the joint connector 102A is inserted into the locking portion 113 from below in the vertical direction of the frame 103 and locked.

  Here, as shown to FIGS. 3-5, the through-hole 115 (drain hole) which penetrates this latching | locking part 113 and the division wall 114 along a perpendicular direction is provided. When the frame 103 is molded, the locking portion 113 becomes an undercut portion. The through-hole 115 is a die-cutting hole formed in order to remove the mold from the upper side and the lower side in the vertical direction during the undercut process of the locking portion 113. The inclined surface 114 a of the partition wall 114 faces the upper side in the vertical direction and is formed to be inclined downward from the center side of the frame 103 toward the inner peripheral surface of the side wall. It opens to the lower side of the downward slope of the inclined surface 114a.

  Next, the operation of the electrical junction box 100 according to the present embodiment will be described with reference to FIG. As shown in FIG. 5, the inclined surface 114 a of the partition wall 114 is arranged below the inclined surface 111 d of the insertion port partition 110 in the vertical direction with a substantially constant gap along the inclination of the inclined surface 111 d. Yes. Further, a through hole 115 is provided in the lower part of the inclined surface 114 a of the partition wall 114. For example, water may enter the inside of the housing 101 from a location vertically above the partition wall 114 such as a fitting portion between the upper cover 104 and the frame 103. In this case, when the water that has entered the housing 101 falls to the partition wall 114, the inclined surface 114a of the partition wall 114 and the inclined surface 111d of the fourth insertion port 109D are aligned along the inclination direction of the inclined surface 114a of the partition wall 114. Are gathered at the lowermost portion of the inclined surface 114 a on the inner peripheral surface side of the side wall of the frame 103. The collected water passes through the through-hole 115 and is discharged to the lower cover 105 in the lower vertical direction, and is discharged to the outside through a drain port provided in the lower cover 105. In other words, the gap between the inclined surface 114a of the partition wall 114 and the inclined surface 111d of the insertion port partition 110 is a guide passage 117 that guides water that has entered the housing 101 and dropped onto the partition wall 114 to the through hole 115. Function as. Further, the through hole 115 functions as a drain hole that discharges water that has entered the interior from above the housing 101 to the lower cover 105 side.

  As described above, the electrical junction box 100 of the present embodiment is formed in a cylindrical shape having openings on the upper side and the lower side when installed, and the frame 103 that houses the electronic component 102 therein, the upper side of the frame 103, and the like. The upper cover 104 that closes the opening, the lower cover 105 that closes the opening on the lower side of the frame 103, and the peripheral wall of the frame 103 that are slidably engaged from the upper cover 104 side and attached to the electronic component 102 are inserted. An insertion port partition 110 that forms a fourth insertion port 109D, and is provided on the lower cover 105 side of the insertion port partition 110 on the inner peripheral surface of the peripheral wall of the frame 103, faces the upper cover 104 side, A partition wall 114 having an inclined surface 114a formed by being inclined downward from the center side toward the inner peripheral surface, and a lower portion from the inclined surface 114a Provided with through holes 115 as the drain hole penetrating through a partition wall 114 to the bar 105 side.

  With this configuration, the drainage path in the housing 101 can be provided by using the excess space below the insertion port partition 110 and the fourth insertion port 109D in the vertical direction, so that various electronic devices assembled in the housing 101 can be provided. It is possible to superimpose and arrange the drainage path along the vertical direction with respect to the component 102, and space saving can be realized. Therefore, the electrical junction box 100 of the present embodiment can ensure drainage and can save space.

  Further, the electrical junction box 100 of the present embodiment is partitioned between the inclined surface 114a of the partition wall 114 and the insertion port partition 110, enters the frame 103, and falls from the upper cover 104 side to the partition wall 114. And a guide passage 117 for guiding the water to the through hole 115.

  With this configuration, water that has entered the housing 101 (inside the frame 103) and dropped onto the partition wall 114 can be efficiently guided to the through-hole 115. Further, the guide passage 117 is formed by a gap between the inclined surface 114a of the partition wall 114 and the insertion port partition 110 (inclined surface 111d), and the width of the passage is limited. The amount of water flowing to the lowermost side of the provided inclined surface 114a can be adjusted to a predetermined amount or less.

  Moreover, in the electrical junction box 100 of this embodiment, the latching | locking part 113 with which the joint connector 102A is latched is provided in the lower cover 105 side of the division wall 114. FIG. The through hole 115 used as a water drain hole is a hole for die cutting when the locking portion 113 is created. That is, in the present embodiment, the existing through hole 115 provided when the frame 103 is formed is used as a drain hole. With this configuration, it is not necessary to form a new hole for providing the drainage path, and the cost can be reduced.

  As mentioned above, although embodiment of this invention was described, the said embodiment was shown as an example and is not intending limiting the range of invention. The above-described embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. The above-described embodiments and modifications thereof are included in the invention described in the claims and the equivalents thereof, as long as they are included in the scope and gist of the invention.

  In the above embodiment, the configuration in which the guide passage 117 that guides water to the through hole 115 is formed by the gap between the inclined surface 114a of the partition wall 114 and the inclined surface 111d of the insertion port partition 110 is illustrated. Such a guide passage 117 may be omitted. Specifically, the inclined surface 111d may not be provided in the insertion port partition 110, and the inclined surface 114a of the partition wall 114 may be exposed on the upper side in the vertical direction. In this case, the water that has entered the housing 101 and dropped on the partition wall 114 flows down to the lowermost side along the downward slope of the inclined surface 114 a of the partition wall 114 and reaches the through hole 115.

DESCRIPTION OF SYMBOLS 100 Electrical connection box 102 Electronic component 102A Joint connector 103 Frame 104 Upper cover 105 Lower cover 109D 4th insertion port (insertion port)
DESCRIPTION OF SYMBOLS 110 Insertion port division body 113 Locking part 114 Partition wall 114a Inclined surface 115 Through-hole (drain hole)
117 Guide passage

Claims (2)

A frame that is formed into a cylindrical shape with openings on the upper side and the lower side when installed, and that houses electronic components therein;
An upper cover for closing the opening on the upper side of the frame;
A lower cover that closes the opening on the lower side of the frame;
An insertion port partition body that is attached to the peripheral wall of the frame by being slidably engaged from the upper cover side and that forms an insertion port through which a group of electric wires connected to the electronic component is inserted, and
The inner peripheral surface of the peripheral wall of the frame is provided on the lower cover side of the insertion port partition, faces the upper cover side, and is inclined downward from the center side of the frame toward the inner peripheral surface. A partition wall having an inclined surface,
A drain hole provided through the partition wall from the inclined surface to the lower cover side;
Equipped with a,
The insertion port partition has a horizontal cylinder part extending in a direction orthogonal to the side surface of the frame, and an inclined cylinder part formed to be inclined from the horizontal cylinder part to the upper cover side,
In the frame, it is partitioned between the inclined surface of the partition wall and the inclined surface of the inclined tube portion of the insertion port partition body, enters the frame, and enters the partition wall from the upper cover side. electrical connection box according to claim Rukoto further comprising an induction passage to induce falling water to the water drain hole. On the lower cover side of the partition wall, a locking portion for locking the joint connector is provided,
The water drain hole is characterized by a hole for die cutting when creating the locking part, the electrical connection box according to claim 1.

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