JP2514391Y2 - Electrical junction box - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric junction box for automobiles.

[0002]

2. Description of the Related Art Conventionally, it is not easy to electrically connect a plurality of conductors (bus bars) arranged in multiple layers via an insulating plate in an electric junction box for an automobile, and such a connection is hardly made. Didn't. However, in recent years, there have been strong demands for weight reduction and cost reduction of vehicles, and accordingly, it has become necessary to reduce the size, weight and cost of electric junction boxes. Therefore, for the purpose of electrically connecting the busbars together, for example, the following ultrasonic welding means have been used. That is, as shown in FIG. 3, one of the bus bars 11a and 11b to be electrically connected is provided with a step at one end, and the bus bars 11a and 11b are arranged so as to overlap at the end. Insulation plate 1
A through hole 13 is provided at a position corresponding to the overlapping portion of the bus bars 11a and 11b of 2a. Busbars 11a and 11b
The ultrasonic welding is performed by applying ultrasonic welding horns 14 from above and below the bus bars 11a and 11b through the through holes 13. Reference numeral 15 is an ultrasonic welding portion. Bus bar 11a, 11
After ultrasonic welding, b is laminated on another layer of the bus bar and the insulating plate and assembled into an electric connection box.

[0003]

However, the above-mentioned connection of bus bars using ultrasonic welding has the following problems. That is, as shown in FIG. 4, in the process of assembling the electric junction box, the conductive substance 16 penetrates into the through hole 13 of the insulating plate 12a, so that the bus bar 11a and the insulating plate 12 are not in contact with each other.
There was a risk that the bus bar 11c on b was electrically short-circuited and a leak current would flow. Such a leak current causes heat generation and ignition.

[0004]

SUMMARY OF THE INVENTION The present invention provides an electrical junction box that solves the above problems, in which conductors are arranged in multiple layers via insulating plates, and the conductors are in the same layer or in different layers. In the electrical connection box, wherein the conductors are connected to each other by ultrasonic welding, and the insulating plate adjacent to the ultrasonic welding portion is provided with a through hole for ultrasonic welding, the insulating plate being adjacent to the insulating plate. The insulating plate is provided with a protruding portion that closes the through hole. As described above, when a protruding portion that closes the through hole is provided in the insulating plate adjacent to the insulating plate provided with the through hole for ultrasonic welding, the through hole is closed in the assembled state of the electrical junction box, It is possible to prevent the conductive material from entering the holes. Also, if foreign matter enters the through hole during assembly,
Since the foreign matter is pushed out of the through hole by the protrusion, the foreign matter can be found and removed during the assembly process.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the embodiments shown in the drawings. FIG. 1 is a partially exploded perspective view of an embodiment of an electric junction box according to the present invention, and FIG. 2 is a partial sectional view of the embodiment. In the figure, 1a, 1b and 1c are bus bars and 2
a and 2b are insulating plates. There is a step at the end of the bus bar 1b, and the bus bars 1a and 1b are arranged so as to overlap at the end. Bus bar 1a of insulating plate 2a,
A through hole 3 is provided at a position where 1b overlaps. By applying ultrasonic welding horns (not shown) to the upper and lower sides of the bus bars 1a and 1b through the through holes 3,
It is conventional to ultrasonically weld a and 1b to each other. The insulating plate 2b adjacent to the insulating plate 2a is provided with a protrusion 4 at a position facing the through hole 3. The shape of the protruding portion 4 is such that the protruding portion 4 fits into the through hole 3 when the electrical junction box is assembled. In such an electrical junction box, it is possible to prevent foreign matter from entering the through hole 3, and even if foreign matter enters the through hole 3, it can be detected during the assembly process. In the above embodiment, the ultrasonically welded busbars were both arranged on the same insulating plate, but the ultrasonically welded busbars may be arranged on different insulating plates.

[0006]

As described above, according to the present invention, conductors are arranged in multiple layers via insulating plates, and the conductors in the same layer or different layers are connected to each other by ultrasonic welding. In the electrical connection box in which the through hole for ultrasonic welding is provided in the insulating plate adjacent to the ultrasonic welded portion, the insulating plate adjacent to the insulating plate has a protruding portion that closes the through hole. Since it is provided, there is an excellent effect that it is possible to prevent the conductive material from entering the through hole in the assembled state of the electrical junction box.

[Brief description of drawings]

FIG. 1 is a partially exploded perspective view of an embodiment of an electrical junction box according to the present invention.

FIG. 2 is a partial sectional view of the embodiment.

FIG. 3 is an explanatory diagram of a method for connecting conductors of a conventional electric junction box.

FIG. 4 is an explanatory diagram of a problem of the conventional method.

[Explanation of symbols]

1a, 1b, 1c, 11a, 11b, 11c Bus bar 2a, 2b, 12a, 12b Insulation plate 3, 13 Through hole 4 Projection part 14 Ultrasonic welding horn 15 Ultrasonic welding part 16 Conductive substance

Claims (1)

(57) [Scope of utility model registration request] 1. The conductors are arranged in multiple layers via insulating plates, and the conductors in the same layer or in different layers are connected to each other by ultrasonic welding and are adjacent to the ultrasonic welded portion. An electrical connection box in which an insulating plate is provided with a through hole for ultrasonic welding, wherein an insulating plate adjacent to the insulating plate is provided with a protruding portion that closes the through hole. box.