JP3669118B2 - Electrical junction box for automobiles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric junction box for automobiles, which is an upper case that is reduced in size to reduce the cost of parts and to save space.
[0002]
[Prior art]
As shown in FIGS. 3 and 4, the electrical junction box connected to the automobile wire harness includes an upper case 20 and a lower case 21, and a bus bar 22 constituting an internal circuit in the upper case 20 and the lower case 21. And the insulating plate 23 are often stacked and stored.
[0003]
A relay (not shown), a fuse (not shown), fusible links 24a, 24b, and the like are mounted on the upper surface of the upper case 20, and the relay, fuse, fusible links 24a, 24b, etc. are mounted on the upper case. 20 is electrically connected to a bus bar 22 constituting the internal circuit.
[0004]
Specifically, storage portions 25a, 25b, and 25c for mounting relays, fuses, and the like are provided on the upper surface of the upper case 20, and the relay terminals are electrically connected to the tabs of the bus bar 22 via the relay terminals 26. A fuse is electrically connected to the terminal 27 in the fuse housing 25b.
[0005]
The fusible links 24 a and 24 b are electrically connected by screwing the nuts 29 to the connection surfaces of the bus bars 22 using screws 28.
[0006]
[Problems to be solved by the invention]
In the electrical junction box shown in FIG. 3 and FIG. 4, all bus bars constituting the internal circuit are horizontal bus bars 22, and therefore occupy substantially the entire area of the lower case 21 of the horizontal bus bar 22. When the horizontal bus bar 22 is used, it is necessary to hold these laminates from above in order to stack them with insulating plates, and it is necessary to accommodate and hold relay terminals that are interposed to connect fuses, relays, and the like. Therefore, it is necessary to attach the upper case 20 to the upper surface of the bus bar 22 in the horizontal direction.
[0007]
As a result, the upper case 20 has substantially the same size as the lower case 21, which increases the size, increases the manufacturing cost, and takes up installation space.
[0008]
In view of the above problems, the present invention has an object to reduce the size of the upper case to reduce the component cost and to save space.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, the present invention includes a lower case, an upper case, and an upper cover,
A laminated body in which an insulating plate is interposed between horizontal bus bars is accommodated in a part of the lower case, and an upper case provided with a relay and fuse accommodating portion is covered only on the laminated area of the horizontal bus bar. While holding the laminate between the upper case and the upper case,
The other part of the lower case is latched and held by a partition wall formed in the lower case to accommodate a plurality of vertical bus bars, and a screw fastening portion formed in the lower case is connected to a power input terminal, a fusible link, and a screw on the vertical bus bar. Tighten and fix
An automotive electrical junction box that covers the upper cover in a state in which the upper case on the storage area side of the horizontal bus bar is stored above the entire area of the lower case including the storage area of the vertical bus bar that does not cover the upper case. providing.
[0010]
As described above, in the electrical junction box according to the present invention, a bus bar that has been conventionally arranged in a horizontal direction is set to a vertical direction, a stacked portion of the horizontal bus bar and an insulating plate is reduced, and the bus bar is set to a vertical direction. In contrast, since the connecting parts are electrically connected by screw tightening, the upper case is unnecessary, and it is only necessary to provide the upper case only in the horizontal bus bar region. In this way, the upper case can be reduced in size by changing a part of the horizontal bus bar to the vertical bus bar.
[0011]
The horizontal bus bar is provided with a refracted tab, and the relay terminal stored and held in the upper case is connected to the tab.
[0012]
With the above configuration, components such as relays and fuses can be electrically connected to the horizontal bus bar, and at the same time, the vertical bus bar can be electrically connected to the horizontal bus bar from the power input terminal via the fusible link. Thereby, a relay, a fuse, and a fusible link can be mounted on the electrical junction box.
[0013]
Further, as described above, the upper cover is covered in a state in which the upper case on the storage area side of the horizontal bus bar is stored above the entire area of the lower case including the storage area of the vertical bus bar not covered with the upper case. . Thereby, components, such as a relay, a fuse, and a fusible link, can be protected from the outside.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0015]
The upper surface of the electrical junction box is divided into a region on which the relays and fuses on the load side are mounted and a region on which the fusible link on the power source side is mounted.
[0016]
As shown in FIGS. 1 and 2, on the load side, a horizontal bus bar 3 and an insulating plate 4 constituting an internal circuit are stacked and housed inside a lower case 1 and an upper case 2.
On the upper surface of the upper case 2, storage portions 2a, 2b, 2c for mounting a relay (not shown), a fuse (not shown) and the like are provided. A tab 3a in which a part of the horizontal bus bar 3 is refracted protrudes into the relay housing portion 2a, and a female-female type relay terminal 5 is connected to the tab 3a. A terminal can be connected to the horizontal bus bar 3. Further, a terminal 11 electrically connected to the horizontal bus bar 3 is provided in the fuse housing portion 2 b, and the fuse can be connected to the horizontal bus bar 3 through the terminal 11.
[0017]
On the other hand, on the power source side, the fusible links 7a and 7b are fastened and fixed to the vertical bus bars 6a, 6b, 6c and 6d, which are placed on a part of the lower case 1, by screws 10.
[0018]
In other words, the vertical bus bars 6a and 6c are provided with an electrical connection portion having a screw hole 6e that is refracted horizontally at its upper end, and screwed to the lower case 1 together with the power input terminals 8a and 8b through the screw hole 6e. doing. Each vertical bus bar 6a, 6b, 6c, 6d is electrically connected by connecting the lower end to the horizontal bus bar 3 on the load side.
[0019]
The vertical bus bars 6a, 6b, 6c, and 6d are arranged along the partition wall 12 formed in the lower case 1 and are held by being locked to the partition wall 12, so that it is not necessary to be held between the lower case 1 and the upper case 2. Become. Therefore, it is not necessary to cover the upper case in the left half region of the electrical junction box in which the vertical bus bars 6a, 6b, 6c, 6d are arranged.
[0020]
In this way, the upper case 2 is covered only on the laminated region of the horizontal bus bars 3, and the upper case 2 is not covered on the storage regions of the vertical bus bars 6a, 6b, 6c, 6d. The upper cover 9 is placed over the entire area on the side to protect the relays, fuses, fusible links 7a, 7b and other parts from the outside.
[0021]
【The invention's effect】
As is clear from the above explanation, according to the electrical junction box for automobiles of the present invention, it is not necessary to cover the upper case only in the horizontal bus bar stacking region and to cover the vertical bus bar storage region. Therefore, the size of the upper case can be reduced as compared with the conventional case, and the mold necessary for forming the upper case can also be reduced. As a result, the cost of parts can be reduced.
[Brief description of the drawings]
FIG. 1 is a top view of an automobile electrical junction box according to an embodiment of the present invention.
FIG. 2 is a side sectional view of an electric junction box for automobiles according to an embodiment of the present invention.
FIG. 3 is a top view of a conventional electrical junction box.
FIG. 4 is a side sectional view of a conventional electric junction box.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lower case 2 Upper case 3 Horizontal bus bar 3a Tab 4 Insulation board 5 Relay terminal 6a, 6b, 6c, 6d Vertical bus bar 7a, 7b Fusible link 8a, 8b Power supply input terminal 9 Upper cover

Claims (1)

Equipped with lower case , upper case , upper cover ,
A laminated body in which an insulating plate is interposed between horizontal bus bars is accommodated in a part of the lower case, and an upper case provided with a relay and fuse accommodating portion is covered only on the laminated area of the horizontal bus bar. While holding the laminate between the upper case and the upper case,
Other portions of the lower case, a plurality of vertical bus bars to yield capacity and locking hold the partition wall formed in the lower case, and the power input terminal and a fusible link in the vertical busbar screw fastening portion formed on the lower case Secure with screws,
An automotive electrical junction box that covers the upper cover in a state in which the upper case on the storage area side of the horizontal bus bar is stored above the entire area of the lower case including the storage area of the vertical bus bar that does not cover the upper case .

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