JPS63175359A - Joint box for wiring - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wiring joint box used for connecting wiring circuits in, for example, automobiles.

[Prior Art] Conventionally, as shown in FIG. 4, a joint box for automobile wiring has a plurality of busbar circuit boards 3 stacked between an upper case 1 and a lower case 2, and these busbar circuit boards A tab terminal 4 formed at 3 protrudes from the holes of the upper case 1 and the lower case 2. Note that 5 is an insulating partition plate that ensures insulation between the busbar circuit boards 3 and positions the busbar circuit boards 3.

For example, as shown in FIG. 5, these busbar circuit boards 3 are mostly made by punching and bending a metal plate made of copper or brass using a press to form conductive paths 6 and tab terminals 4. It is. Since the busbar circuit board 3 in this case has a circuit constructed from a flat metal plate, a lot of time is spent on designing to accommodate a large number of tab terminals 4 within a predetermined space. However, there is a limit to the arrangement of the tab terminals 4 depending on the design, for example, it is not possible to arrange the tab terminals 4 vertically symmetrically at the same location with the conductive path 6 in between. This is difficult to realize, and it is inevitable that a certain amount of volume will be sacrificed, and the yield of material in this case is poor, with 50 to 70% of the material being scraped in most cases. Furthermore, since large press equipment and press molds are required for punching and bending, the equipment cost is extremely high.

[Object of the Invention] The object of the present invention is to solve the above-mentioned drawbacks and to provide a wiring board that can manufacture a complex circuit in a small volume by manufacturing a busbar circuit board by casting means. The purpose is to provide a box.

[Summary of the Invention] The gist of the present invention to achieve the above-mentioned object is to provide an upper case and a lower case made of synthetic resin with tab terminals made of a cast product protruding upward and/or downward. The wiring joint box is characterized in that at least one bus bar circuit board is sandwiched therein, and the tab terminals are inserted into holes provided in the upper case and the lower case.

[Embodiments of the Invention] The present invention will be described in detail based on embodiments illustrated in FIGS. 1 to 3.

FIG. 1 is an exploded perspective view of a wiring diagonal box, in which 10 is an upper case, 11 is a busbar circuit board, 12 is an insulating partition plate, and 13 is a lower case. Upper case lO1
The insulating partition plate 12 and the lower case 13 are molded from a synthetic resin having electrical insulation properties, and the upper case 10 is provided with a large number of holes 10a, in which the tabs of the bus bar circuit board 11, which will be described later, are inserted. The terminal 11a is inserted into the hole 10 into which the tab terminal 11a is inserted.
A relay connection terminal (not shown) is fitted inside a. The busbar circuit board ll is a conductive path 11 stretched in a plane.
A plurality of tab terminals 11a are projected upward and downward from b, and for example, as shown in FIG. 2, the tab terminals 11a can be projected in the vertical direction at the same location. The entire busbar circuit board 11 is manufactured by casting means such as zinc alloy or aluminum alloy, and its surface is plated if necessary. Busbar circuit board 11
The conductive path 11b, which requires a large current capacity, is made to have a cross-sectional area increased by changing its wall thickness, for example, so that the current density can be adjusted without changing the overall volume. Furthermore, since casting involves injecting molten metal into a mold or the like, the rate of scrap generated is extremely low as in conventional methods, and the generated spools and launches can be recycled and used effectively. The insulating partition plate 12 is used to ensure insulation between the busbar circuit boards 11 and between the busbar circuit boards 1.
1, the groove 12a into which the busbar circuit board 11 is fitted and the hole 1 through which the tab terminal Lla is inserted.
2b.

The lower case 13 is provided with a hole (not shown) for inserting the tab terminal 11a, and when stacked, the upper case 1
A locking pawl 13b is provided that passes through the fitting groove 10b of No. 0 and fits into the fitting groove 10b. .

When assembling, the busbar circuit board 11 is connected to the insulating partition plate 1.
2 through the grooves 12a and holes 12b of the upper case 1 from above and below the bus bar circuit board 11 and the insulating partition plate 12.
0. Cover the lower case 13 and tighten the locking claw 1 of the lower case 13.
3a is engaged with the fitting groove 10b of the upper case 1O, and the entire structure is stacked.

Note that if the conductive paths flb of the busbar circuit board 11 are completely separated, it will be inconvenient to handle, so the conductive path 11b
It is conceivable to connect the connecting portions 11c at appropriate locations in between, as shown in FIGS. 3(a) and 3(b). In this case, by forming a V-shaped groove lid on the lower side of the connecting part 11c, the pedestal 1 can be assembled with the insulating partition plate 12.
4 and punch out the connecting part 11c with the punch 15. Conventionally, a press mold had to be used, but by forming a V-shaped groove lid, the connecting part 11c can be punched out very easily. can be removed.

In addition, in the embodiment, as described above, the busbar circuit board 11 is
Although the case where only one layer is provided is shown, if a complex circuit cannot be realized with only one layer, the bus bar circuit board 11 and the insulating partition plate 12 may be stacked in multiple layers.

[Effects of the Invention] As explained above, the wiring joint box according to the present invention can have a large number of tab terminals arranged in high density by manufacturing the busbar circuit board by casting means, and the whole can be made compact. can be converted into

[Brief explanation of the drawing]

Drawings 1 to 3 show an embodiment of a wiring joint box according to the present invention, in which Fig. 1 is an exploded perspective view, Fig. 2 is an enlarged perspective view of a part of a busbar circuit board, and Fig. 3 is an exploded perspective view. (a) is a perspective view of a part of a busbar circuit board provided with a connecting part, (b) is a sectional view thereof, FIG. 4 is a sectional view of a conventional joint box, and FIG. 5 is a conventional busbar circuit. It is a perspective view of a board. 10 is an upper case, 10a is a hole, 11 is a busbar circuit board, lla is a tab terminal, llb is a conductive path, llc is a connecting portion, 12 is an insulating partition plate, 12a is a groove, 12b is a hole, 13 is a lower part It is a case.

Claims (1)

[Claims] 1. At least one busbar circuit board made of a cast product and having tab terminals protruding upward and/or downward is sandwiched between an upper case and a lower case made of synthetic resin. A joint box for wiring, characterized in that the tab terminals are inserted into holes provided in the upper case and the lower case. 2. The wiring joint box according to claim 1, wherein the busbar circuit boards are stacked and an insulating partition plate is arranged between these busbar circuit boards. 3. The wiring joint box according to claim 1, wherein a relay terminal is fitted into the hole of the upper case and the tab terminal is connected to the hole.