JP3956779B2 - Electrical junction box - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electrical junction box attached to a vehicle body such as an automobile.
[0002]
[Prior art]
As shown in FIG. 6, in this type of electrical junction box 51, a plurality of water is attached to a mounting surface 51 a on which electrical functional components such as a relay 52 and a fuse 53 are mounted in order to discharge water droplets generated by condensation inside. A hole 55 is formed.
[0003]
Although the electrical connection box 51 is assembled to the vehicle body with the mounting surface 51a of the electrical functional component oriented vertically, the mounting direction of the electrical connection box 51 is not determined due to differences in vehicle type, specifications, and the like. Under such circumstances, the drainage holes are formed in the four corners of the junction box body 54 so that any drainage hole 55 is always arranged on the lower side regardless of the mounting direction of the electrical junction box 51. 55 is formed.
[0004]
[Problems to be solved by the invention]
In the electrical junction box 51 shown in the prior art, since the drain hole 55 is arranged at the corner of the mounting surface 51a, the drain hole 55 is arranged not only on the lower side but also on the upper side of the junction box body 54. The The drain hole 55 disposed on the lower side has a function of discharging water droplets generated in the junction box main body 54, but water droplets generated in the vehicle body due to condensation are connected from the drain hole 55 on the upper side. There is a risk of dropping into the box body 54 and entering the inside of the connection box body 54. That is, if the water drain hole 55 that should fulfill the function of discharging water droplets is positioned above the connection box main body 54, it becomes an entrance for water droplets, and although the water drain hole 55 has a small opening area, the connection box It is impossible to prevent water droplets from entering the main body 54.
[0005]
Therefore, it is desirable to form the drain hole 55 only at a location where the drain hole 55 is disposed below the junction box body 54 in a state where the junction box body 54 is assembled to the vehicle body. However, regardless of the vehicle type, specifications, etc., if it is attempted to produce a plurality of types of connection box main bodies 54 having different positions of the water drain holes 55 so that the water drain holes 55 are on the lower side, Mold production costs are high. As a result, the manufacturing cost of the electrical junction box 11 is increased, so that it cannot be said to be a realistic structure.
[0006]
The present invention has been made paying attention to such problems existing in the prior art. The purpose is to provide a configuration in which only a drip-proof portion is provided, and to make it difficult for water droplets to enter the inside of the junction box body, and to suppress the manufacturing cost.
[0007]
[Means for Solving the Problems]
(Invention of Claim 1)
According to the first aspect of the present invention, a connection box main body on which an electric functional component is detachably mounted is provided, and the connection box main body includes a lower case and an upper case that are assembled to each other . in the electrical junction box form shape a plurality of drainage holes in the corners of the mounting surface, the corner portion of the opening edge of the lower case, in order to prevent the water droplets from entering the interior of the junction box body from the drain hole The drip-proof portion is bent along the corner portion of the lower case and is integrally projected from the opening edge of the lower case so as to follow the direction in which the two cases are assembled .
[0008]
According to the present invention, when the electrical junction box is assembled to the vehicle body with the mounting surface of the electrical functional component oriented vertically, the drain hole is formed in the corner portion of the electrical functional component mounting surface in the upper case. Accordingly, drain holes are arranged on both upper and lower sides of the junction box body. In this state, even if water droplets from the outside generated by condensation on the vehicle body try to enter through the upper drain hole, a drip-proof portion is provided at the corner at the opening edge of the lower case . Water drops are less likely to enter the junction box body. In addition, even if the mounting direction of the electrical junction box with respect to the vehicle body is arbitrarily changed with the mounting surface of the electrical functional component being oriented vertically, the drip-proof portion is bent and formed, so that the upper side of the electrical junction box A drip-proof part will always be located in the upper edge of the drain hole in this. Therefore, since the assembly direction of the electric junction box can be freely changed regardless of the specification of the vehicle and the like, the parts can be shared, and the manufacturing cost can be reduced. Furthermore, when the lower case and the upper case are assembled, the upper case is guided by the drip-proof portion. Therefore, the assembling work of the junction box body is simplified.
[0009]
(Invention of Claim 2)
According to a second aspect of the present invention, in the electrical junction box according to the first aspect, in the state where the electrical junction box is attached to a vehicle body, the drain hole and the drip-proof portion are directed obliquely downward. This is the gist.
[0010]
According to this invention, in a state where the electrical junction box is attached to the vehicle body, water droplets are easily discharged from the drain hole located on the lower side of the electrical junction box. At the same time, it becomes even more difficult for water droplets from the outside to enter the drain hole located on the upper side of the electrical junction box.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the junction box body 12 of the electrical junction box 11 includes a lower case 13 and an upper case 14 that is detachably mounted so as to close the opening. On the upper case 14, a relay 15, a fuse 16, and a connector 17, which are electrical functional parts, are detachably mounted.
[0016]
As shown in FIGS. 1 to 3, the electrical junction box 11 is attached to the vehicle body 21 so that the mounting surface 11 a of the electrical functional component is slightly obliquely downward with respect to the direction of gravity. A plurality of drain holes 23a to 23d for discharging water droplets generated by condensation inside the junction box body 12 are formed in the four corner portions on the mounting surface 11a of the electrical functional component. Therefore, even if the electrical connection box 11 is attached to the vehicle body 21 in any orientation with the mounting surface 11a of the electrical functional component in the vertical orientation depending on the vehicle type, specifications, etc., at least one of the four The through holes 23a to 23d are inevitably disposed on the lower side of the electrical junction box 11.
[0017]
Incidentally, in this embodiment, the electrical junction box 11 is attached to the vehicle body 21 with the connector 17 on the upper side and the relay 15 on the lower side. Of the four drain holes 23a to 23d, two drain holes 23a and 23b are arranged on the upper side of the electrical junction box 11, and the remaining two drain holes 23c and 23d are arranged on the lower side. .
[0018]
In a state where the electrical junction box 11 is attached to the vehicle body 21, the drain holes 23a to 23d are directed obliquely downward, and the junction box body 12 is also inclined downward. For this reason, water droplets are easily discharged from the drain holes 23c and 23d on the lower side. Further, since the drain holes 23a and 23b located on the upper side are also directed obliquely downward, water droplets from the outside are less likely to enter the junction box body 12.
[0019]
As shown in FIGS. 3 to 5, drip-proof portions 25 a to 25 d are integrally extended at the corner portion at the opening edge of the lower case 13, and the drip-proof portions 25 a to 25 d are respectively drained holes 23 a to 23 d. It is arranged in the vicinity. The drip-proof portions 25 a to 25 d protrude in the same direction as the direction in which the upper case 14 is aligned with the lower case 13 when the upper case 14 is assembled to the lower case 13.
[0020]
The drip-proof portions 25a to 25d are bent and formed in a substantially L shape along the corner portion of the junction box body 12, and one side is set to be substantially the same length as one side of the drain holes 23a to 23d. It should be noted that the length of one side of the drip-proof portions 25a to 25d can be set to be longer than that of the drain holes 23a to 23d. It is also possible to form the drip-proof portions 25a to 25d in a circular arc shape having a central angle of 90 ° or more.
[0021]
The tip portions of the drip-proof portions 25c and 25d are located outward from the mounting surface 11a of the electrical functional component. Therefore, the drip-proof portions 25c and 25d located on the lower side of the electrical junction box 11 function to guide the water droplets discharged from the lower drain holes 23c and 23d to a place away from the mounting surface 11a of the electrical functional component. There is. Moreover, in a state where the electrical junction box 11 is attached to the vehicle body 21, the drip-proof portions 25c and 25d located on the lower side face obliquely downward. For this reason, discharge of water droplets passing through the lower drip-proof portions 25c and 25d is promoted. Furthermore, since the drip-proof portions 25a and 25b located on the upper side are also directed obliquely downward, it is difficult for water droplets from the outside to enter the junction box body 12 via the upper drain holes 23a and 23b. Yes.
[0022]
Therefore, according to the present embodiment, the following effects can be obtained.
Even when the two drain holes 23a and 23b are arranged on the upper side in a state where the electric junction box 11 is assembled to the vehicle body 21, the water drip generated by the upper drip-proof portions 25a and 25b is generated in the vehicle body 21. Water drops are less likely to enter the junction box body 12. Therefore, it is possible to protect the precision electronic components housed in the junction box body 12 from water droplets. In addition, since the four drip-proof portions 25a to 25d project along the direction in which the lower case 13 and the upper case 14 are assembled, the upper case 14 can be assembled while being guided by the respective drip-proof portions 25a to 25d. . Therefore, the assembly work of the junction box body 12 is simplified. Note that when the upper case 14 is mounted on the lower case 13 while being guided, the drip-proof portions 25a to 25d are not limited to four but can be changed to three or five or more. That is, at least three or more drip-proof parts 25a-25d are preferable for assembling while guiding the upper case 14 by the drip-proof parts 25a-25d.
[0023]
Further, the drip-proof portions 25c and 25d located on the lower side of the electrical junction box 11 guides the water droplets coming out from the lower drain holes 23c and 23d to a place away from the mounting surface 11a of the electrical functional component, so that it is discharged. Can prevent adverse effects caused by water. That is, the water droplets coming out of the lower drain holes 23c and 23d do not enter the junction box body 12 again from the gap at the boundary between the lower case 13 and the upper case 14.
[0024]
Furthermore, the drip-proof portions 25 a to 25 d are formed in an L shape along the corner portion of the junction box main body 12. Therefore, the drip-proof portions 25a and 25b can always be arranged above the drain holes 23a and 23b even if the mounting direction of the electrical junction box 11 is changed while the mounting surface 11a of the electrical functional component is kept vertical. Accordingly, it is not necessary to prepare a plurality of types of connection box main bodies 12 having different arrangements of drain holes 23a to 23d according to the vehicle type, specifications, etc., so that the connection box main bodies 12 can be made common and the manufacturing cost can be reduced. can do.
[0025]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, while only having provided the drip-proof part, while being able to make a water drop difficult to penetrate | invade into the inside of a junction box main body, suppression of manufacturing cost can be aimed at.
[Brief description of the drawings]
FIG. 1 is a perspective view of an electrical junction box showing one embodiment.
FIG. 2 is a side view showing a state in which the electric junction box is attached to the vehicle body.
FIG. 3 is an exploded perspective view showing the upper part of the junction box body.
FIG. 4 is an enlarged perspective view of the upper portion of the junction box body.
FIG. 5 is an enlarged front view of the upper portion of the junction box body.
FIG. 6 is a perspective view of an electric junction box according to a conventional technique.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Electric junction box, 11a ... Mounting surface of electrical functional component, 12 ... Connection box main body, 13 ... Lower case, 14 ... Upper case, 15 ... Relay (electric functional component), 16 ... Fuse (electric functional component), 17 ... Connector (electrical functional component), 21 ... vehicle body, 23a, 23b, 23c, 23d ... drain hole, 25a, 25b, 25c, 25d ... drip-proof part.

Claims (2)

A junction box body on which electrical functional parts are detachably mounted is provided.The junction box body is composed of a lower case and an upper case that are assembled to each other, and a plurality of water is provided at the corner of the mounting surface of the electrical functional parts in the upper case . in the electrical junction box that forms the shape of the vent hole,
In the corner portion at the opening edge of the lower case, a drip-proof portion for preventing water droplets from entering the inside of the junction box main body from the drain hole is bent along the corner portion of the lower case and the both An electrical junction box characterized by being integrally projected from an opening edge of the lower case along a direction in which the case is assembled . 2. The electrical junction box according to claim 1 , wherein the drain hole and the drip-proof portion face obliquely downward when the electrical junction box is attached to the vehicle body .

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