JP2565820Y2 - Electrical junction box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electric junction box used for interconnection of wire harnesses and the like.

[Conventional technology]

In the internal circuit of the electric connection box, a bus bar wiring in which a plurality of bus bars (branch conductive paths) and an insulating plate are stacked to absorb a joint part included in a wire harness (assembled electric wire) and simplify a wiring form. Boards are often used.

FIG. 6 shows an example of a bus bar wiring board. A plurality of planar bus bars b, b '... Having a desired pattern are provided on an insulating plate a, and each bus bar has a terminal portion c extending upward and downward.
Are coupled. These bus bars b, b '... Can be integrally formed by punching a single conductive plate in a state where the terminal portions c are developed as shown by dotted lines c'. There is an advantage that the number of branches can be freely changed by increasing or decreasing the number.

On the other hand, a large detour d must be provided in the bus bar b in order to avoid interference of the bus bar b 'with the terminal portion c' in the expanded state, and a considerable dead space s between the adjacent bus bars b and b '. Occurs. Therefore, there are drawbacks in that the handling of the busbar is complicated, the arrangement density is reduced, and the number of busbar layers is easily increased.

[Problems to be solved by the invention]

An object of the present invention is to provide an electric junction box having a structure capable of eliminating the above-mentioned drawbacks, simplifying the handling of busbars, increasing the density, and reducing the number of busbar layers.

[Means for solving the problem]

The present invention provides a through circuit (relay circuit) in which a bus bar constituting an internal circuit is simply connected from one side of an electric connection box to the other side without being connected to circuit protection means such as a fuse or a relay or control means. It is made by paying attention to a certain point.

That is, in the present invention, as described in claim 1, a busbar wiring board formed by stacking a plurality of planar busbars having a desired pattern and an insulating plate is accommodated in the upper and lower cases, and the busbar wiring board is erected and coupled to the busbar. In an electric connection box in which terminal portions are led out into housings provided in upper and lower cases to form insertion portions for fuses, relays, connectors, etc., the terminals are connected to circuit protection means and control means such as the fuses and relays. A bus bar having a terminal portion that simply passes from one of the upper and lower cases into the insertion portion of the other case without having a terminal portion to be connected is a terminal portion connected to the circuit protection means and the control means. The short bus bar is formed as a short bus bar different from the bus bar having the following.The short bus bar is formed by projecting terminal portions on both side edges of a narrow band-shaped substrate portion, and the terminal portion on one side of the short bus bar is formed in front. The terminal portion on the other side is formed as a through circuit protruding from the insertion portion of the other case vertically opposed to the one insertion portion. It is characterized by the following.

Further, one terminal portion of the short busbar can be supported by being orthogonal to the insulating plate, penetrating through a terminal insertion hole provided in the insulating plate, and protruding from the insertion portion (claim 2). Further, the short busbar may be formed as a branch short busbar having two or more terminal portions on one side edge of the substrate portion (claim 3).

[Action]

According to the present invention, of the plurality of busbars constituting the internal circuit of the electric connection box, the through circuit that simply enters from one of the electric connection boxes and exits from the other can be separated from the other circuits and replaced with the short busbar.

Accordingly, the above-mentioned detours of the bus bars provided on the insulating plate are reduced, and the routing is simplified, so that high-density wiring is possible, and the number of bus bar (or wiring board) layers is reduced, and the size of the bus bar (or wiring board) is reduced. A densified electrical junction box is obtained.

Hereinafter, the above configuration and operation will be specifically described with reference to the drawings showing the embodiments.

〔Example〕

In FIG. 1, reference numeral A denotes an electric connection box, which is a bus bar wiring board 4 in which a first layer bus bar 2, an insulating plate 3, and a second layer bus bar 2 'are stacked inside a lower case 1 and an upper case 5.
It is configured to accommodate.

The planar busbars 2, 2 'of each layer are formed with a desired pattern and have terminal portions 6 coupled upward or downward, and these terminal portions 6 are connected to the upper case 5 (and the lower case 1). It is led out to the provided housing to form various insertion portions such as a connector insertion portion 7, a relay insertion portion 7 ', and a fuse insertion 7 ". Reference numeral 8 denotes an insertion hole of the terminal portion 6, and reference numeral 9 denotes an insertion hole. Indicates ribs for arranging busbars.

The above is the same configuration as the conventional electric junction box, but in the present invention, a plurality of short bus bars 10 are
It is inserted to penetrate 5,1.

As shown in FIGS. 2 and 3, the short bus bar 10 has one terminal portion 10b on one side of the substrate portion 10a and two terminal portions 10b on the other side.
Has c. The lower terminal 10c is a through hole provided in the lower case 1.
Protruding into the housing through 11 to form connector 12. Further, the upper terminal portion 10b is provided with the insertion hole 8 of the insulating plate 3.
And projecting into the housing in the upper case 5 to form a connector insertion portion 7 together with the terminal portion 6 of the first layer bus bar 2.

FIG. 4a shows a chain of short busbars B. Second
The short bus bar 10 shown in the figure is obtained by cutting and removing the connecting portion S of the strip-shaped substrate portion 10a. When this cutting site is changed, as shown in FIG.
A short bus bar 10 'or 10 "with three poles on one side can be obtained, so use a desired number of poles if necessary. These short bus bars 10, 10', 10" are not necessarily used for inserting the insulating plate 3. It is not necessary to penetrate the hole 8 and can be set apart from the insulating plate 3.

FIG. 5 shows an example of a circuit diagram using the short busbar 10. Circuits denoted by reference numerals 13 and 13 'are short busbars 1
It is formed by 0. Since these circuits 13 and 13 'only disconnect from one connector 7A to the other connector 7B, a fuse
Are not related to the circuits 15, 15 ', etc., with the interposition of them, and need not necessarily be arranged on the insulating plate 3 shown in FIG. Similarly, it is irrelevant to the multi-branch circuit 16 having the connectors at the four connectors 7A to 7D.

[Effect of the invention]

As described above, according to the present invention, a portion corresponding to a so-called through circuit in a bus bar constituting an internal circuit of an electric connection box is connected to a circuit portion such as a fuse or a relay, which is connected to a circuit protection unit or a control unit. Since the bus bar is separated from the bus bar and replaced with a short bus bar, it is possible to simplify the handling of the bus bar and to arrange it at a high density, to reduce the number of bus bar layers, and to provide a compact electric junction box. it can.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an electric junction box showing an embodiment of the present invention, FIG. 2 is an enlarged perspective view of a main part of the same, FIG. 3 is an enlarged cross-sectional view of a main part in an assembled state of FIG. 4a and b are explanatory diagrams each showing another embodiment of the short bus bar, FIG. 5 is an explanatory diagram showing an example of a circuit using the short bus bar, and FIG. 6 is an explanatory diagram of a conventional bus bar wiring board. 1 ... lower case, 2, 2 '... busbar, 3 ... insulating plate,
4 Busbar wiring board, 5 Upper case, 6 Terminal part, 7, 7 ', 7 "Insertion part (such as connector), 10, 10', 1
0 ″… Short busbar, 10b, 10c …… Terminal part, 13,1
3 ': Through circuit.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Showa 60-7617 (JP, U) Japanese Utility Model Showa 62-48117 (JP, U) Japanese Utility Model Showa 62-132628 (JP, U)

Claims (3)

(57) [Scope of request for utility model registration] 1. A busbar wiring board comprising a plurality of planar busbars having a desired pattern and an insulating plate superposed on each other is accommodated in an upper and lower case, and terminal portions coupled to the busbar are provided in the upper and lower cases. In an electric connection box formed by inserting it into a housing and forming an insertion portion such as a fuse, a relay, a connector, etc., the electric connection box simply has no terminals connected to circuit protection means or control means such as the fuse, relay, etc. A bus bar having a terminal portion that can be pulled out from one of the upper and lower case insertion portions to the insertion portion of the other case is a short bus bar different from a bus bar having a terminal portion connected to the circuit protection means and the control means. The short busbar is formed by protruding terminal portions on both side edges of a narrow band-shaped substrate portion, and the terminal portion on one side of the short busbar is connected to one of the insertion portions of the upper and lower cases. Sudden Is an electrical junction box terminal portion of the other side is characterized in that it is formed as a through circuit which is projected insertion portion of the other of the case which faces vertically with one of the insertion portion said. 2. The electrical connection according to claim 1, wherein one terminal portion of said short bus bar is orthogonal to said insulating plate and penetrates through a terminal insertion hole provided in said insulating plate and projects to said insertion portion. box. 3. The electrical junction box according to claim 1, wherein the short bus bar is formed as a branch short bus bar having two or more terminals on one side edge of the substrate portion.