JP2024044726A - Electric connection box - Google Patents

Abstract

To provide an electric connection box that can be provided with a fixing part regardless of a mold structure that forms an enclosure and is improved in workability.SOLUTION: An electronic component is mounted on a block 2. The block 2 is stored in a cylindrical frame 3. The frame 3 is provided with a first notch 11 formed by cutting an edge part of an opening. A first standing wall 14 is provided with a second notch 141 formed by cutting the edge part. The first notch 11 and the second notch 141 mate with each other to form a wire insertion hole 15 that allows insertion of a wire 21. The block 2 has a band fixing part protruding from the wire insertion hole 15 to the outside of the frame 3, the band fixing part binding and fixing a binding band 20 together with the wire 21.SELECTED DRAWING: Figure 2

Description

The present invention relates to an electrical connection box.

BACKGROUND ART Electrical connection boxes (also called junction boxes, fuse boxes, relay boxes, etc.) that are mounted on vehicles such as automobiles and that collect and house electronic components such as wire harnesses, fuses, and relays are known. Such an electrical connection box includes a wire insertion hole through which a wire electrically connected to an electronic component housed in the electrical connection box is passed (for example, see Patent Documents 1 and 2).

Japanese Patent Application Publication No. 2020-184859 Japanese Patent Application Publication No. 2004-7909

In the electrical junction box, it is necessary to provide a band fixing part (fixing part) at the exit of the wire insertion port, in which a binding band (binding member) is bound and fixed together with the electric wires. In a conventional electrical junction box, a band fixing portion was provided on the outer surface of the frame (casing). However, in addition to the band fixing part, a fitting member for fitting a cover (lid part) and a vehicle fixing part for fixing to a vehicle protrude from the outer surface of the frame. For this reason, if a fitting member or vehicle fixing part is provided protruding in the direction of removal of the mold for the wire insertion port, there is a problem in that the band fixing part cannot be provided in the casing due to the mold. Ta.

Further, when a band fixing part is provided on the frame, it is necessary to tie the binding band together with the wire to the fixing part after passing the wire through the wire insertion opening, which causes a problem of poor workability.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide an electrical connection that can provide a fixing part and improve workability regardless of the structure of the mold that forms the casing. The purpose is to provide the box.

In order to achieve the above-mentioned object, the electrical junction box according to the present invention has the following features.
A block on which electronic components are mounted;
A cylindrical housing that houses the block;
a cover portion having a main body wall that closes an opening of the housing and a first standing wall that stands from the main body wall toward the housing,
The housing has a first notch formed by cutting out an edge of the opening,
The first standing wall is provided with a second notch formed by cutting out an edge portion of the first standing wall in a first standing direction,
The first cutout and the second cutout are combined to form an electric wire insertion hole through which an electric wire is inserted,
the block has a fixing portion that protrudes from the electric wire insertion hole to the outside of the housing and to which a bundling member is bound and fixed together with the electric wires,
It is an electrical junction box.

According to the present invention, it is possible to provide an electrical connection box in which a fixing portion can be provided regardless of the mold structure for forming the casing, and in which workability is improved.

The present invention has been briefly described above. The details of the present invention will become clearer by reading the following description of the embodiment of the invention (hereinafter referred to as "embodiment") with reference to the attached drawings.

FIG. 1 is a perspective view showing an embodiment of an electrical junction box according to the present invention. FIG. 2 is an exploded perspective view of the electrical junction box shown in FIG. FIG. 3 is a partially enlarged perspective view of the electrical junction box shown in FIG. 1 with the block removed. FIG. 4 is a partial cross-sectional view taken along line AA in FIG. FIG. 5 is a partially enlarged perspective view of the block shown in FIG. FIG. 6 is a perspective view for explaining the procedure for assembling the electrical junction box shown in FIG.

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

For ease of explanation, the following definitions are used to refer to "front," "rear," "left," "right," "top," and "bottom," as shown in Figs. 1 to 6. The "front-rear direction," "left-right direction," and "top-bottom direction" are mutually orthogonal. The top-bottom direction corresponds to the "first standing direction" of the present invention, and the front-rear direction corresponds to the "second standing direction" of the present invention.

As shown in FIGS. 1 and 2, the electrical connection box 1 of this embodiment includes a block 2 (see FIG. 2) on which electronic components are mounted, a frame 3 serving as a housing for housing the block 2, and an upper cover. 4, and a lower cover 5 as a lid part. The block 2, frame 3, upper cover 4, and lower cover 5 are each integrally molded from an insulating synthetic resin.

First, the frame 3 will be described. The frame 3 is a generally rectangular tube that is long in the front-rear direction and has openings at the top and bottom. The rear side of the frame 3 protrudes downward more than the front side. On the outer surface of the frame 3, there are protruding fitting portions 9 into which the upper cover 4 and lower cover 5 (described below) are fitted, and vehicle fixing portions 10 for fixing the frame to the vehicle.

As shown in FIG. 2, the frame 3 has a first cutout 11 that is approximately semicircular and cut out from the edge of the lower opening. In this embodiment, the first cutout 11 is cut out from the rear side of the edge of the lower opening. In this embodiment, the edge of the lower opening of the frame 3 has a pair of protrusions 12, 12 that protrude downward from both ends of the first cutout 11.

The upper cover 4 is attached to the frame 3 so as to close the upper opening of the frame 3.

The lower cover 5 includes a main body wall 13 that closes an opening on the lower side of the frame 3, and a first standing wall 14 that stands upward from the main body wall 13 (toward the frame 3). The main body wall 13 includes a first main body wall part 131 that closes the rear side of the lower opening, a standing wall part 132 that stands upward from the rear end of the first main body wall part 131, and a vertical wall that is connected to the upper end of the standing wall part 132 and extends downward. It has a second main body wall portion 133 that closes the front side of the side opening. The first main body wall 131 is located below the second main body wall 133.

The first standing wall 14 has a second cutout 141 that is approximately rectangular and is formed by cutting out an upper edge (an edge in the first standing direction of the first standing wall 14). The second cutout 141 is provided with a width in the left-right direction on the upper side that is wider than the width in the left-right direction on the lower side. When the lower cover 5 is attached to the frame 3, as shown in FIG. 3, the first cutout 11 and the second cutout 141 are aligned in the vertical direction to form an electric wire insertion hole 15 through which the electric wire 21 is inserted. Furthermore, when the lower cover 5 is attached to the frame 3, a pair of protrusions 12, 12 provided on the frame 3 are inserted into the wide upper portion of the second cutout 141.

Next, block 2 will be described. As shown in FIG. 2, block 2 has a main body 6 on which electronic components such as relays and fuses are mounted, a second standing wall 7 standing from the main body 6 toward the first notch 11, and a band fixing portion 8 provided at the tip of the second standing wall 7.

The main body portion 6 is provided in a substantially cubic shape that is elongated in the front-rear direction, and is provided with a cavity in which electronic components are accommodated. In this embodiment, the main body portion 6 is arranged above the second main body wall portion 133 of the lower cover 5. The second standing wall 7 stands upright from the rear end of the main body 6 toward the lower side, and is provided perpendicularly in the front-rear direction. As shown in FIG. 4, the second standing wall 7 is arranged to overlap the inner surface of the frame 3.

As shown in FIG. 1, the band fixing portion 8 protrudes from the wire insertion hole 15 to the outside of the frame 3. As shown in FIG. 6, the band fixing portion 8 is fixed together with the electric wires 21 by binding a binding band 20 as a binding member. As shown in FIGS. 4 and 5, the band fixing portion 8 includes a third standing wall 81, a pair of fourth standing walls 82, 83, and a fifth standing wall 84 (see FIG. 5). The third standing wall 81 stands upright from the lower end of the second standing wall 7 toward the rear (toward the outside of the frame 3 ), and is overlapped with the edge of the first notch 11 .

In this embodiment, the third standing wall 81 is overlapped with the entire edge of the first cutout 11. Since the first cutout 11 is semicircular, the third standing wall 81 is provided on a semicircular curved surface that follows the edge of the first cutout 11. A pair of fourth standing walls 82, 83 are erected from the third standing wall 81 provided outside the frame 3 toward the outside of the electric wire insertion hole 15, and face each other with a gap in between in the front-rear direction.

The fourth standing wall 83 on the side away from the frame 3 is provided so that the length in the direction along the edge of the first notch 11 is shorter than that of the fourth standing wall 82 near the frame 3. That is, in this embodiment, as shown in FIG. 5, the fourth standing wall 83 is provided so as to face only the left half of the fourth standing wall 82. Further, the third standing wall 81 is cut out at a portion where the pair of fourth standing walls 82 and 83 do not face each other. The fifth standing wall 84 connects the left ends of the pair of fourth standing walls 82 and 83. The third vertical wall 81 to the fifth vertical wall 84 provide the band fixing portion 8 with a cylindrical portion that opens in the vertical direction.

Next, the assembly procedure of the above-mentioned electrical connection box 1 will be described with reference to FIG. 6. First, electronic components are mounted on the block 2, and the multiple electric wires 21 connected to the mounted electronic components are placed on the lower surface of the third standing wall 81. Next, the cable tie 20 is tied and fixed to the band fixing portion 8 together with the multiple electric wires 21. At this time, the cable tie 20 is wrapped around the upper surface of the third standing wall 81 provided between the pair of fourth standing walls 82, 83. The cable tie 20 is also wrapped around the lower surface of the third standing wall 81, sandwiching the multiple electric wires 21 between the cable tie 20 and the lower surface of the third standing wall 81. Furthermore, the cable tie 20 is passed through a cylindrical portion provided by the third standing wall 81 to the fifth standing wall. Next, the block 2 is housed in the frame 3, and then the upper cover 4 and the lower cover 5 are attached to the frame 3 to complete the electrical connection box 1.

According to the embodiment described above, the block 2 is provided with the band fixing part 8 for binding the binding band 20. When the vehicle fixing part 10 is provided on the first notch 11 as in the frame 3 of this embodiment, the band fixing part 8 cannot be provided on the frame 3 due to the mold. In this way, even if the band fixing part 8 cannot be provided on the frame 3 due to the mold, the band fixing part 8 can be provided. Moreover, since the binding band 20 can be tied to the band fixing part 8 together with the electric wire 21 before the block 2 is housed in the frame 3, workability can be improved.

According to the embodiment described above, the band fixing portion 8 is provided at the tip of the second standing wall 7 that stands downward from the main body portion 6 of the block 2 and is superimposed on the inner surface of the frame 3. As a result, even if water enters through the gap between the frame 3 and the second standing wall 7, the height of the second standing wall 7 allows the water to be drained.

According to the embodiment described above, the band fixing portion 8 has a third standing wall 81 and a pair of fourth standing walls 82, 83 that stand upright from the third standing wall 81 and face each other with a gap in the front-to-rear direction. This makes it easy to tie the cable tie 20 because the cable tie 20 can be tied between the pair of fourth standing walls 82, 83. In addition, the pair of fourth standing walls 82, 83 can prevent water from entering the frame 3.

According to the embodiment described above, the fourth standing wall 83 is provided so that its length in the direction along the edge of the first cutout 11 is shorter than that of the fourth standing wall 82. This allows the fourth standing wall 82, which is closer to the frame 3, to further suppress water intrusion. In addition, the third standing wall 81 is cut out at a portion where the pair of fourth standing walls 82, 83 do not face each other. This makes it easier to see the electric wires 21 from above and makes it easier to bind the electric wires 21.

Note that the present invention is not limited to the embodiments described above, and can be modified, improved, etc. as appropriate. In addition, the material, shape, size, number, arrangement location, etc. of each component in the above-described embodiments are arbitrary as long as the present invention can be achieved, and are not limited.

According to the embodiment described above, the block 2 is provided with the band fixing part 8 at the tip of the second vertical wall 7, but the present invention is not limited to this. Depending on the shape of the frame 3, a band fixing part 8 may be provided at the lower end of the main body part 6.

According to the embodiment described above, the pair of fourth vertical walls 82 and 83 are provided in the band fixing part, but the present invention is not limited to this. Providing the pair of fourth vertical walls 82 and 83 is not essential and may be omitted.

Here, the features of the embodiments of the electrical junction box according to the present invention described above will be briefly summarized and listed in the following [1] to [4].
[1]
A block (2) on which electronic components are mounted;
A cylindrical housing (3) that houses the block (2);
a cover portion (5) having a main body wall (13) that closes an opening of the housing (3) and a first standing wall (14) that stands from the main body wall (13) toward the housing (3),
The housing (3) is provided with a first notch (11) formed by cutting out an edge of the opening,
The first standing wall (14) is provided with a second notch (141) formed by cutting out an edge portion of the first standing wall (14) in a first standing direction (upper side in the vertical direction),
The electric connection box (1) has a configuration in which the first notch (11) and the second notch (141) are combined to form an electric wire insertion hole (15) through which an electric wire (21) is inserted,
The block (2) has a fixing portion (8) that protrudes from the electric wire insertion hole (15) to the outside of the housing (3) and to which the bundling member (20) is bound and fixed together with the electric wires (21).
Electrical junction box (1).

According to the configuration [1] above, the block (2) is provided with the fixing part (8) for binding the binding member (20). Thereby, even if the frame (3) cannot be provided with the fixing part (8) due to the mold, the fixing part (8) can be provided. Furthermore, since the binding member (20) can be tied together with the electric wire (21) to the fixed part (8) before housing the block (2) in the frame (3), workability can be improved. can.

[2]
In the electrical connection box (1) described in [1],
The block (2) includes a main body (6) on which the electronic component is mounted, and a main body (6) that stands upright from the main body (6) toward the first notch (11). It has a second standing wall (7) stacked on the inner surface,
The fixing part (8) is provided at the tip of the second standing wall (7),
Electrical junction box (1).

According to the configuration [2] above, the tip of the second standing wall (7) is arranged so as to face vertically downward, and if the second standing wall (7) has a certain length, the frame (3) and the second standing wall Even if water enters through the gap with (7), it will be drained because of the height.

[3]
In the electrical connection box (1) according to [1],
The fixing portion (8) has a third standing wall (81) that stands upright toward the outside of the housing (3) and is overlapped with an edge portion of the first cutout (11), and a pair of fourth standing walls (82, 83) that stand upright from the third standing wall (81) provided outside the housing (3) toward the outside of the electric wire insertion hole (15) and face each other with a gap in between in a second standing direction (front-rear direction) of the third standing wall (81).
Electrical junction box (1).

According to the configuration [3] above, since the binding member (20) can be bound between the pair of fourth vertical walls (82, 83), it is easy to bind the binding member (20). Furthermore, the pair of fourth vertical walls (82, 83) can suppress water from entering the inside of the casing (3).

[4]
In the electrical connection box (1) described in [3],
Of the pair of fourth vertical walls (82, 83), one (83) farther from the casing (3) is closer to the first notch (11) than the other (82) closer to the casing (3). ) is provided so that the length in the direction along the edge is shortened,
The third standing wall (81) is cut out at a portion where the pair of fourth standing walls (82, 83) do not face each other.
Electrical connection box.

According to the configuration [4] above, the fourth vertical wall (83) that is farther from the housing (3) has the first notch (11 ) is provided so that the length in the direction along the edge is shortened. Thereby, the fourth vertical wall (82) close to the housing (3) can further suppress water intrusion. Further, the third standing wall (81) is cut out in a portion where the pair of fourth standing walls (82, 83) do not face each other. This makes the electric wires (21) easier to see and makes it easier to bundle the electric wires (21).

1 Electrical junction box 2 Block 3 Frame (casing)
5 Lower cover (lid)
6 Main body part 7 Second standing wall 8 Band fixing part (fixing part)
11 First notch 13 Main body wall 14 First vertical wall 15 Wire insertion hole 20 Binding band (binding member)
21 Electric wire 81 Third standing wall 82, 83 Fourth standing wall 141 Second notch

Claims (4)

A block on which electronic components are mounted;
A cylindrical housing that houses the block;
a cover portion having a main body wall that closes an opening of the housing and a first standing wall that stands from the main body wall toward the housing,
The housing has a first notch formed by cutting out an edge of the opening,
The first standing wall is provided with a second notch formed by cutting out an edge portion of the first standing wall in a first standing direction,
The first cutout and the second cutout are combined to form an electric wire insertion hole through which an electric wire is inserted,
the block has a fixing portion that protrudes from the electric wire insertion hole to the outside of the housing and to which a bundling member is bound and fixed together with the electric wires,
Electrical junction box. The electrical connection box according to claim 1,
The block has a main body on which the electronic component is mounted, and a second standing wall that stands from the main body toward the first notch and overlaps the inner surface of the casing,
the fixing part is provided at the tip of the second standing wall;
electrical connection box. 2. The electrical junction box according to claim 1,
the fixing portion has a third standing wall that stands toward the outside of the housing and is overlapped with an edge portion of the first cutout, and a pair of fourth standing walls that stand toward the outside of the electric wire insertion hole from the third standing wall provided outside the housing and face each other with a gap in a second standing direction of the third standing wall.
Electrical junction box. The electrical connection box according to claim 3,
One of the pair of fourth vertical walls that is away from the casing is provided so that the length in the direction along the edge of the first notch is shorter than the other one that is closer to the casing;
The third standing wall is cut out at a portion where the pair of fourth standing walls do not face each other.
electrical connection box.

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