JP2019075904A - Electric connection box - Google Patents

Abstract

To provide an electric connection box with a reduced size and a short height, capable of being easily installed in a narrow installation space.SOLUTION: An electric connection box is provided with: a main body 11; an electronic unit 30 accommodated in the main body 11; a feeder cable connected to the electronic unit 30; and a cover 12 mounted on a pull-out side of the feeder cable in the main body 11. The feeder cable comprises a plurality of electric wires W1 connected in parallel to a power feeding circuit of the electronic unit 30, is pulled out of the electronic unit 30 to a side in which the cover 12 is mounted, and is passed through an opening 17 formed on the cover 12.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electrical connection box.

  2. Description of the Related Art Conventionally, electric connection boxes containing various electronic components are mounted on vehicles such as automobiles (see, for example, Patent Documents 1 and 2).

JP, 2015-008571, A JP 2002-034131 A

  In recent years, the installation space of various parts in vehicles has become narrower. For this reason, also in the electric connection box mounted in a vehicle, in order to enable installation to a narrow installation space, further miniaturization and height reduction are required.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide an electrical connection box which can be compact and low in height and can be easily installed in a narrow installation space.

In order to achieve the objective mentioned above, the electrical connection box which concerns on this invention is characterized by following (1)-(3).
(1) The case,
An electronic unit housed in the housing;
A feed line connected to the electronic unit;
The housing has a bottom surface formed with an opening on the lead-out side of the feed line,
The electrical connection box according to claim 1, wherein the feeder comprises a plurality of electric wires connected in parallel to a feeder circuit of the electronic unit, and is drawn from the electronic unit to the bottom side and passed through the opening.
(2) The electrical connection box according to (1), wherein the plurality of electric wires constituting the feed line are connected to a feed circuit of the electronic unit at mutually spaced positions.
(3) The electrical connection box according to (1), wherein the plurality of electric wires constituting the feed line are connected to the same feed circuit of the electronic unit.

According to the electrical connection box of the configuration of the above (1), the feeder connected to the electronic unit housed in the housing is composed of a plurality of wires, and these wires are connected in parallel to the feeder circuit of the electronic unit. Thus, the diameter of the wire to be wired as the feeder can be reduced, and the wire drawn from the electronic unit can be bent with a small radius of curvature and passed through the opening of the cover. Therefore, the space on the lead-out side of the feed line in the housing, that is, the bottom side can be made as small as possible, so that the size and height of the electric connection box can be reduced and it can be easily installed in a narrow space. In addition, weight reduction can be achieved by reducing the diameter of the wire.
According to the electrical connection box of the configuration of (2), the connection points of the respective wires in the electronic unit are separated by the configuration in which the plurality of wires constituting the feeder are connected to the feed circuit at mutually separated positions in the electronic unit. Thus, thermal interference can be suppressed. Moreover, the terminal for connection provided at the end of each wire can be miniaturized, and further weight reduction can be achieved.
According to the electrical connection box of the configuration of (3), the plurality of electric wires constituting the feeder can be easily wired to the electronic unit by the same feeder circuit in the electronic unit. For example, one terminal can be provided at the end of a plurality of wires, and can be collectively connected to the terminals of the power supply circuit of the electronic unit, whereby the wiring workability can be improved.

  According to the present invention, it is possible to provide an electrical connection box which can be easily installed in a small and low-profiled narrow installation space.

  The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading the modes for carrying out the invention described below (hereinafter referred to as "embodiments") with reference to the attached drawings. .

FIG. 1 is an exploded perspective view of the electrical connection box according to the first embodiment of the present invention. Fig.2 (a) is a disassembled perspective view of the electronic unit based on 1st Embodiment of this invention, FIG.2 (b) is a side view of the electronic unit after the attachment completion. FIG. 3 is a cross-sectional view corresponding to the cross section AA of FIG. 2 (b) of the electronic unit according to the first embodiment of the present invention. FIG. 4 is an exploded perspective view of the electronic unit according to the second embodiment of the present invention. FIG. 5 is a cross-sectional view corresponding to the cross section AA of FIG. 2B of the electronic unit according to the second embodiment of the present invention.

  Specific embodiments of the present invention are described below with reference to the figures.

First Embodiment
Hereinafter, the electrical connection box 10 according to the first embodiment of the present invention will be described. The electrical connection box 10 is also called a relay box. The electrical connection box 10 is typically mounted on a vehicle and used by being electrically connected to various on-vehicle electrical components.

  As shown in FIG. 1, the electrical connection box 10 has a rectangular cylindrical resin main body 11 opened in the vertical direction, and a resin lower cover 12 attached to the lower end edge of the main body 11 and covering the lower surface of the main body 11. And a resin upper cover 13 attached to the upper end edge of the main body 11 and covering the upper surface of the main body 11.

  A substrate 14 is fixedly disposed inside the main body 11, and a plurality of (four in this example) relays 15 and a plurality (three in this example) fuses 16 are provided on the upper surface side of the substrate 14. And are attached. In addition, a box-shaped electronic unit attachment portion 20 (see FIG. 2) opening upward is fixedly disposed inside the main body 11, and the electronic unit 30 (see FIG. 2) is inserted into the electronic unit attachment portion 20. Is attached.

  As shown in FIGS. 2 and 3, connector connectors 33 and 34 (see FIG. 3) provided on the lower surface side of the electronic unit 30 include two connectors C1 (FIG. 2) connected to one end of the electric wire W1. One connector C2 (see FIG. 2) connected to one end of the electric wire W2 is connected. In this example, the wires W1 connected to the respective connectors C1 are single wires, and the wires W2 connected to the connector C2 are wire bundles composed of a plurality of wires. Therefore, a single female terminal (not shown) connected to the electric wire W1 is disposed in the terminal accommodation hole in each connector C1, and a plurality of electric wires constituting the electric wire W2 are disposed in the terminal accommodation hole in the connector C2. A plurality of female terminals (not shown) connected to each are arranged.

  The electric wire W <b> 1 is a feeder that feeds power to the electronic unit 30, and is connected in parallel to the power feeding circuit of the electronic unit 30. That is, the feeder line for feeding the electronic unit 30 is composed of the two electric wires W1 connected in parallel to the feeder circuit of the electronic unit 30. These electric wires W1 are electrically connected to a power source such as a battery of a vehicle or an alternator, for example. The electric wire W2 is a signal line connected to the control circuit of the electronic unit 30, and is electrically connected to, for example, an on-vehicle electrical component of the vehicle.

  A connector (not shown) connected to one end of the electric wire W3 and a connector (not shown) connected to one end of the electric wire W4 are provided at two connector connection parts (not shown) provided on the lower surface side of the substrate 14 Not shown) are connected to each other. In this example, the electric wires W3 and W4 are wire bundles each consisting of a plurality of electric wires, and are electrically connected to, for example, an on-vehicle electrical component of a vehicle.

  The electric wires W1 to W4 are bundled together and drawn downward from the lower cover 12 through an opening 17 provided in the lower cover 12. The other ends of the wires W1 to W4 are electrically connected to, for example, various in-vehicle electrical components.

  As shown in FIGS. 2 and 3, the electronic unit attachment portion 20 has a box-shaped case 21 made of a resin that opens upward. Since the electronic unit 30 is inserted into the case 21, the internal space of the case 21 has a shape corresponding to the outer shape of the electronic unit 30.

  As shown in FIG. 3, a connector mounting hole 22 and a connector mounting hole 23 are formed in the bottom of the case 21 so as to be vertically penetrated by the side walls extending upward. The connector attachment hole 22 is a hole for attaching the connector C1 connected to one end of the electric wire W1, and has a shape corresponding to the outer shape of the connector C1. Similarly, the connector attachment hole 23 is a hole for attaching the connector C2 connected to one end of the electric wire W2, and has a shape corresponding to the outer shape of the connector C2. Two connector mounting holes 22 are formed and provided on both sides of the connector mounting hole 23.

  Water drainage holes (through holes) 24 are formed at a plurality of locations different from the connector mounting holes 22 and 23 on the bottom surface of the case 21. At the opposing position of the upper end edge of the case 21, a pair of locking claws 25 extending in a direction approaching each other is formed.

  The electronic unit 30 has a substantially rectangular parallelepiped resin casing 31 whose upper end portion has a semi-cylindrical shape. As shown in FIG. 3, a plurality of semiconductors 32 are embedded in the housing 31. A concave connector connection portion 33 and a connector connection portion 34 that are recessed upward are formed on the bottom surface of the housing 31 respectively. The connector connection portion 33 is a recess for connecting the connector C1, and has a shape corresponding to the outer shape of the connector C1. Similarly, the connector connection portion 34 is a recess for connecting the connector C2, and has a shape corresponding to the outer shape of the connector C2. Two connector connection portions 33 are formed, and are provided on both sides of the connector connection portion 34.

  A single male terminal 35 to be engaged with a single female terminal in the connector C 1 protrudes downward from the bottom surface of each connector connection portion (recess) 33, and a connector connection portion (recess) 34 From the bottom surface, a plurality of male terminals 36 that respectively engage with a plurality of female terminals in the connector C2 protrude downward. The male terminal 35 is electrically connected to the feeding circuit of the semiconductor 32, and the male terminal 36 is electrically connected to the control circuit of the semiconductor 32. A pair of locking projections 37 are formed on the outer surfaces of the pair of opposing side walls of the housing 31 corresponding to the pair of locking claws 25.

  The electronic unit 30 is inserted into and attached to the internal space of the electronic unit attachment portion 20, and the connectors C1 and C2 inserted into the connector attachment holes 22 and 23 are joined to the connector connection portions 33 and 34. Thereby, the connector C1 is connected to the connector connection portion 33, the female terminal in the connector C1 is electrically connected to the male terminal 35, and similarly, the connector C2 is connected to the connector connection portion 34. The plurality of female terminals in the connector C2 are electrically connected to the plurality of male terminals 36, respectively.

  In order to attach the electronic unit 30 to the electronic unit attachment portion 20, the connector C1 connected to the electric wire W1 is inserted from below into the connector attachment hole 22 of the electronic unit attachment portion 20 and attached. Similarly, the connector C2 connected to the electric wire W2 is inserted from below into the connector attachment hole 23 of the electronic unit attachment portion 20 and attached.

  Thus, in a state where the connectors C1 and C2 are attached to the electronic unit attaching portion 20, the electronic unit 30 is inserted into the internal space of the electronic unit attaching portion 20. Then, the connector C1 is connected to the connector connection portion 33, and the female terminal in the connector C1 is electrically connected to the male terminal 35. Similarly, the connector C2 is connected to the connector connection portion 34, and the plurality of female terminals in the connector C2 are electrically connected to the plurality of male terminals 36, respectively.

  In addition, when the electronic unit 30 is inserted into the electronic unit mounting portion 20, the pair of locking projections 37 of the electronic unit 30 engage with the pair of locking claws 25 of the electronic unit mounting portion 20, thereby the electronic unit 30. The detachment from the electronic unit attachment portion 20 is prevented, the insertion completed state of the electronic unit 30 with respect to the electronic unit attachment portion 20 is maintained, and the connection state of the connectors C1 and C2 with the electronic unit 30 is maintained.

  Thereafter, when the lower cover 12 is attached to the main body 11, the lower cover 12 is fitted to the main body 11 while passing the electric wires W1 to W4 including the electric wires W1 and W2 extending from the electronic unit attachment portion 20 through the opening 17 of the lower cover 12.

  As an assembly procedure, after the electronic unit 30 is assembled to the electronic unit mounting portion 20, the connector C1 connected to the electric wire W1 and the connector C2 connected to the electric wire W2 are used as connector mounting holes of the electronic unit mounting portion 20. 22 and 23 may be inserted from below and attached. Also in this case, the lower cover 12 is fitted into the main body 11 while passing the electric wires W1 to W4 including the electric wires W1 and W2 extending from the electronic unit attachment portion 20 through the opening 17 of the lower cover 12 thereafter.

  As described above, according to the electrical connection box 10 according to the present embodiment, the feed line connected to the electronic unit 30 housed in the main body 11 is composed of the plurality of electric wires W1, and these electric wires W1 are the electronic unit 30. Are connected in parallel to the feed circuit of Thus, the diameter of the electric wire W1 wired as a feeder can be reduced, and the electric wire W1 drawn from the electronic unit 30 can be bent with a small radius of curvature and passed through the opening 17 of the lower cover 12. Specifically, even if the installation position of the electronic unit 30 with respect to the main body 11 is lowered without changing the height of the lower cover 12 or the height of the lower cover 12 is lowered, the electric wire W1 is directed to the opening 17 It can be easily bent and pulled out. Therefore, the space on the lead-out side of the feed line to which the lower cover 12 in the main body 11 is attached can be made as small as possible, thereby achieving miniaturization and low profile of the electric connection box 10 and easily installing in a narrow space. be able to. Moreover, weight reduction by diameter reduction of the electric wire W1 can also be achieved.

  Here, in the case of using a single electric wire as a feeder line for passing a current of 50 A, the diameter of the electric wire is about 8.0 sq, and the terminal connected to the electric wire has a tab width of about 9.5 mm. On the other hand, in the present embodiment, the wire diameter is suppressed to about 3.0 sq by using two electric wires W1 as a feeder, and the terminal connected to the electric wire W1 has a tab width of about 4.8 mm. It becomes. Therefore, the radius of curvature of the feeder can be reduced by reducing the diameter of the wire, so that the size and height of the electric connection box 10 can be reduced, and the weight of the wire and terminal when using one wire (about 64 g) On the other hand, when two electric wires W1 are used, the weight of the electric wires and the terminals (about 45 g) can be reduced.

  In addition, with the configuration in which the plurality of electric wires W1 constituting the electric supply line are connected to the electric supply circuit at mutually separated positions in the electronic unit 30, the connection points of the electric wires W1 in the electronic unit 30 can be separated to suppress thermal interference. Moreover, the female terminal for connection provided at the end of each wire W1 can be miniaturized, and further weight reduction can be achieved.

Second Embodiment
Next, a second embodiment will be described.
The same components as those in the first embodiment are given the same reference numerals and explanation thereof is omitted.
FIG. 4 is an exploded perspective view of the electronic unit according to the second embodiment of the present invention. FIG. 5 is a cross-sectional view corresponding to the cross section AA of FIG. 2B of the electronic unit according to the second embodiment of the present invention.

  As shown in FIGS. 4 and 5, in the second embodiment, one connector mounting hole 22A and one connector mounting hole 23 are formed on the bottom of the case 21 of the electronic unit mounting portion 20. The connector mounting hole 22A is provided on one side of the connector mounting hole 23. The connector mounting hole 22A is a hole for mounting the connector C1A, and has a shape corresponding to the outer shape of the connector C1A. One female terminal is accommodated in the connector C1A, and two electric wires W1 are connected in parallel to this female terminal. Thereby, in the connector C1A, the two electric wires W1 are drawn out.

  In the electronic unit 30, one concave connector connection portion 33 </ b> A and one connector connection portion 34 which are recessed upward are formed on the bottom surface of the housing 31. The connector connection portion 33A is provided on one side of the connector connection portion 34.

  A single male terminal 35A, which engages with a single female terminal in the connector C1A, protrudes downward from the bottom surface of the connector connection portion 33A, and the male terminal 35A is electrically connected to the feeding circuit of the semiconductor 32. It is connected to the.

  Also in the case of the second embodiment, the feed line connected to the electronic unit 30 housed in the main body 11 is composed of a plurality of electric wires W1, and these electric wires W1 are connected in parallel to the feed circuit of the electronic unit 30. Thus, the diameter of the electric wire W1 wired as a feeder can be reduced, and the electric wire W1 drawn from the electronic unit 30 can be bent with a small radius of curvature and passed through the opening 17 of the lower cover 12. Therefore, the space on the lead-out side of the feed line to which the lower cover 12 in the main body 11 is attached can be made as small as possible, thereby achieving miniaturization and low profile of the electric connection box 10 and easily installing in a narrow space. be able to. Moreover, weight reduction by diameter reduction of the electric wire W1 can also be achieved.

  In addition, with the configuration in which the plurality of electric wires W1 constituting the feed line are connected to the same feed circuit in the electronic unit 30, wiring to the electronic unit 30 can be facilitated. For example, one female terminal can be provided at the end of the plurality of electric wires W1, and can be collectively connected to the male terminal 35 of the power supply circuit of the electronic unit 30, and the wiring workability can be improved.

  The present invention is not limited to the embodiments described above, and appropriate modifications, improvements, etc. are possible. In addition, the material, shape, size, number, arrangement location, and the like of each component in the embodiment described above are arbitrary and not limited as long as the present invention can be achieved.

  For example, if the lower cover is formed with a guide member for guiding the wires W1 to W4 toward the opening 17, the wires W1 to W4 are connected even if the main body 11 and the lower cover 12 are integrated. The electronic unit mounting portion 20 in the state and the electronic unit 30 mounted thereto may be brought close to the main body 11 from above, and the electric wires W1 to W4 may be fitted into the main body 11 while passing through the openings 17.

Here, the features of the electrical connection box according to the embodiment of the present invention described above will be briefly summarized and listed in the following [1] to [3].
[1] case (main body 11),
An electronic unit (30) housed in the housing;
A feed line connected to the electronic unit;
The housing has a bottom surface (lower cover 12) in which an opening (17) is formed on the lead-out side of the feed line,
The feeder comprises a plurality of electric wires (W1) connected in parallel to a feeder circuit of the electronic unit, and is drawn from the electronic unit to the bottom side and passed through the opening (17). Electrical connection box to be.
[2] The electrical connection box according to [1], wherein the plurality of electric wires constituting the feeder are connected to a feeder circuit of the electronic unit at mutually spaced positions.
[3] The electrical connection box according to [1], wherein the plurality of electric wires constituting the feeder are connected to the same feeder circuit of the electronic unit.

10 Electrical connection box 11 Body (housing)
12 Lower cover (bottom)
17 opening 21 case 30 electronic unit W1 electric wire (feed line)

Claims (3)

And
An electronic unit housed in the housing;
A feed line connected to the electronic unit;
The housing has a bottom surface formed with an opening on the lead-out side of the feed line,
The electrical connection box according to claim 1, wherein the feeder comprises a plurality of electric wires connected in parallel to a feeder circuit of the electronic unit, and is drawn from the electronic unit to the bottom side and passed through the opening. The electrical connection box according to claim 1, wherein the plurality of electric wires constituting the feed line are connected to a feed circuit of the electronic unit at mutually spaced positions. The electrical connection box according to claim 1, wherein the plurality of electric wires constituting the feeder line are connected to the same feeder circuit of the electronic unit.

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