JP2501425Y2 - Electrical junction box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an electrical junction box incorporating a load current detection device for detecting a load current supplied from, for example, a battery power source of an automobile.

[Prior Art] FIG. 5 to FIG. 7 are circuit diagrams showing a basic configuration of a conventional load current detecting device 1 of this type incorporated in an electric junction box, in which a magnetic gap portion 2a of a magnetic core 2 is shown. A current detection sensor unit 5 that incorporates a magnetic sensing element (magnetoelectric element) 3 into a conductor to detect a load current flowing through a conductor 4 formed of a bus bar, a power supply 6 for applying a voltage to the current detection sensor unit 5, and the current It is composed of an amplifying section 8 having a differential amplifier 7 for amplifying the output of the magnetic sensing element 3 which is the output of the detection sensor section 5.

In such a load current detection device 1, when a load current flows from the battery power source (not shown) to the conductor 4, the load current flowing through the conductor 4 is detected by the current detection sensor unit 5, and a voltage signal corresponding to the load current is generated. It is input to the differential amplifier 7, amplified, and output as a current detection signal in the form of voltage or current output as necessary.

8 to 10 show a structural example of the conventional load current detection device 1. As shown in the figure, the current detection sensor unit 5 and the amplification unit 8 are mechanically integrated by fixing the magnetic core 2 on the printed circuit board 9 of the amplification unit 8 and housed in a dedicated case 10. The power source side conductor 4 passing through the through hole 11 provided in the case 10 is passed through the magnetic core 2 in the case 10, and the power source side conductor 4 passing through the case 10 has a tip end on the load side bus bar. The conductor 12 consisting of screws
Connected at 13. Reference numeral 14 is an input / output connector provided in the case 10.

11 and 12 show such a load current detection device 1
1 shows an example of a conventional electrical junction box in which a box is incorporated in a box 15. The box body 15 of this electric connection box is the upper case
The main fuses 16 and 17A to 17C are connected to the conductors 4 and 12 on the upper surface side of the upper case 15A.

[Problems to be Solved by the Invention] As described above, in the conventional electric connection box, the load current detection device 1 is an independent part, so that it has high versatility, but has the following problems. It was

a. Since the load current detection device 1 is housed in its own exclusive case 10 and has a large shape, it occupies most of the space in the electrical junction box, which hinders the compactness of the electrical junction box.

b. Due to the structure in which the conductor 4 penetrates the through hole 11 of the case 10,
Since the shapes of the conductors 4 and 12 are complicated and the total length of the conductors 4 and 12 is long, the cost increases.

c. Because of the above b, the assembly workability is deteriorated, which is a hindrance to automatic assembly.

An object of the present invention is to provide an electric junction box which can be downsized, can be manufactured at low cost, and can be easily assembled regardless of the type having a built-in load current detection device.

[Means for Solving the Problems] The structure of the present invention for achieving the above-mentioned object will be described. The present invention relates to a room of a box body formed by an upper case and a lower case, and A load current detection device having a current detection sensor unit that incorporates a magnetic sensing element to detect a load current flowing in a conductor that penetrates the magnetic core and an amplification unit that amplifies the output of the magnetic sensing element is incorporated. In the electric connection box, the load current detection device is assembled in the upper case without having its own dedicated case, and the conductor penetrating the magnetic core of the load current device has the magnetic core. It is characterized in that the both ends are cut conductors in a penetrating state, and other conductors are connected to both ends of the cut conductor.

[Operation] Since the load current detection device does not have its own dedicated case as described above, it can be incorporated by utilizing the empty space in the upper case. Therefore, the size of the electric junction box can be reduced.

Since the conductor penetrating the magnetic core is a cut conductor whose both ends are cut while penetrating the magnetic core,
The shape of other conductors connected to this can be simplified and the length can be shortened as compared with the conventional one. Therefore, the assembling workability is improved and the cost can be reduced.

[Embodiment] Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4. The parts corresponding to those in FIGS. 5 to 12 are given the same reference numerals.

In the electrical junction box of this embodiment, the load current detection device 1 is assembled in the space between the insert nuts described later in the upper case 15A without having its own dedicated case. In this case, the magnetic core 2 of the current detection sensor unit 5 is vertically installed in the upper case 15A. The conductor 4 penetrating the magnetic core 2 is a magnetic core 2
The cut conductor has both ends cut in a state of penetrating through. The cutting conductor 4 is horizontally oriented because the magnetic core 2 is vertically oriented. Both ends of the cutting conductor 4 are connected to other conductors from the side facing the lower case 15B as described later.

That is, the conductor 18 connected to the battery power source is connected to one end of the insert nut 19 with the screw 20, and the other end of the insert nut 19 is connected to one end of the main fuse 16 with the screw 21. The other end of the main fuse 16 is connected to an insert nut (not shown) with a screw 22, and the other end of the insert nut is connected to one end of the cutting conductor 4 with a screw. The other end of the cutting conductor 4 is connected to one end of the main fuse 17A with a screw 24 via an insert nut 23. The other end of the cutting conductor 4 is connected to one end of the conductor 12 with a screw 25. The conductor 12 is connected to one end of an insert nut 26 with a screw 27. The other end of the insert nut 26 is connected to one end of the main fuse 17B with a screw 28. Such a connection is performed with the upper case 15A turned upside down. After the connection is finished, the lower case 15B is covered,
It is fixed to the upper case 15A. Load current detection device 1
The amplification section 8 and the like are solidified with resin 29 as required.
In addition, 30 is an electric wiring layer part of the electric junction box, 31 is a relay, 32
Is a blade fuse.

[Effects of the Invention] As described above, in the electric junction box according to the present invention, the load current detection device does not have its own dedicated case, but is incorporated by utilizing the empty space in the upper case. The connection box can be downsized. Also,
Since the conductor penetrating the magnetic core is a cut conductor whose both ends are cut in the state of penetrating the magnetic core, the shape of other conductors connected to this can be simplified as compared with the conventional one. Therefore, the length of the conductor can be shortened, the assembling workability is improved, and the cost can be reduced.

[Brief description of drawings]

1 is a partially cutaway perspective view of the upper side of an electric junction box according to the present invention, FIG. 2 is a plan view of the electric junction box of this embodiment, and FIG. 3 is a sectional view taken along line AA of FIG. Fig. 4, Fig. 4 is a sectional view taken along the line BB in Fig. 2, Fig. 5 is a circuit diagram showing the basic configuration of the load current detection device, and Figs. 6 and 7 are plan views and side views of the current detection sensor unit. Fig. 8 is a perspective view of a conventional load current detecting device, Fig. 9 is a perspective view showing a partially broken case of Fig. 8, and Fig. 10 is a load current detecting device shown in Fig. 9. FIG. 11 is a perspective view showing a state in which a conductor is assembled to the device, and FIGS. 11 and 12 are a plan view and a vertical sectional view of a conventional electric junction box. 1 ... Load current detection device, 2 ... Magnetic core, 2a ... Magnetic gap part, 3 ... Magnetic sensitive element, 4 ... Conductor (cutting conductor), 5 ... Current detection sensor part, 6 ... Power supply , 7: differential amplifier, 8: amplification section, 9: printed circuit board, 10:
Dedicated case, 11 …… through hole, 12 …… conductor, 14 …… connector, 15 …… box, 15A …… upper case, 15B …… lower case, 16,17A to 17C …… main fuse, 18… …
Conductor, 19,23,26 …… Insert nut, 21,22,24,25,2
7,28 …… Screw, 29 …… Resin, 30 …… Electrical wiring layer part, 31…
… Relay, 32 …… Blade fuse.

Claims (1)

(57) [Scope of utility model registration request] 1. A current for detecting a load current flowing through a conductor penetrating the magnetic core by incorporating a magnetic sensitive element in a magnetic gap portion of a magnetic core in a box-shaped chamber formed by an upper case and a lower case. In an electrical junction box in which a load current detection device having a detection sensor unit and an amplification unit that amplifies the output of the magnetic sensing element is incorporated, the load current detection device does not have its own dedicated case. The conductor assembled in the case and penetrating the magnetic core of the load current device is a cut conductor with both ends cut in a state of penetrating the magnetic core. An electrical junction box characterized in that other conductors are connected.