JP3285130B2 - Busbar connection structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bus bar connecting structure for electrically connecting a tab-shaped terminal portion of a bus bar and a relay terminal provided on different layers, respectively.

[0002]

2. Description of the Related Art Conventionally, for example, FIG.
-63826 discloses an electric junction box. In FIG. 6, the electric connection box 50 has busbars 53 and 54 arranged in a desired circuit pattern on insulating substrates 51 and 52 to form busbar wiring boards 55 and 56, respectively.
The stacked circuit body 57 is provided by stacking the bus bar wiring boards 55 and 56, and the stacked circuit body 57 is accommodated in an upper case 58 and a lower case (not shown).

A mounting portion 62 for connecting external connection terminals 60 and 61 from a terminal 59 such as a reel, a fuse, or a wire harness is formed on each outer wall of the upper case 58 and the lower case. Then, the tab-shaped terminal portions 54a of the bus bars 54 provided on the bus bar wiring board 56 pass through the tab insertion holes 55a of the bus bar wiring board 55, and the tab-shaped terminal portions 53a of the bus bars 53 provided on the bus bar wiring board 55 and This is electrically connected to the external connection terminals 60 and 61 by using the relay terminal 63 (see FIG. 8), the tab-shaped terminal portion 54a of the bus bar 54 passing through the tab insertion hole 55a, and the relay terminal 64.

However, when the number of connection points of the external connection terminals 60 and 61 increases, the arrangement of the bus bars 53 (54) on the insulating substrate 51 (52) becomes complicated, and the laminated circuit body 57
A plurality of tab-shaped terminal portions 53 'of the bus bar 53 (54).
(See FIG. 7).
Therefore, in order to prevent a plurality of tab-shaped terminal portions from intersecting in the laminated circuit body 57, an intermediate connection connecting terminal 70 as shown in FIG. 9 has been proposed (Japanese Utility Model Laid-Open No. 5-39125).

[0005] As shown in FIG.
Numeral 0 denotes a pair of relay terminals 71 and 72 connected by a conductive flat plate 73. By utilizing this, the tab-shaped terminal portions 74a of the bus bar 74 as shown in FIG. 10 and the tab-shaped terminal portions 53a of the bus bar 53 are electrically connected. However, as shown in FIG. 10, there is a disadvantage that the electric connection box 50 'becomes large due to the large shape of the intermediate connection terminal 70 in the electric connection box 50'. Further, since the intermediate connection terminal 70 has a special shape, there are problems in that the manufacturing cost of the intermediate connection terminal 70 is high and the types of relay terminals are increased.

[0006]

SUMMARY OF THE INVENTION In view of the above, the present invention has been made in view of the above circumstances, and even if the arrangement of busbars on an insulating substrate becomes complicated, the tab-shaped terminal portions of the busbars do not intersect and the type of relay terminal It is an object of the present invention to provide a bus bar connection structure in which the bus bar does not increase.

[0007]

In order to achieve the above object, the present invention provides a bus bar wiring board formed by arranging bus bars on an insulating substrate having tab insertion holes, and stacking a plurality of the bus bar wiring boards. Forming a laminated circuit body, the first tab-shaped terminal portion of the first bus bar disposed on the first bus bar wiring board of the laminated circuit body, forming a connection notch from the first band-shaped portion side, By inserting another tab-shaped terminal portion from another bus bar wiring board protruding from the tab insertion hole into the first bus bar wiring board into the connection notch, the degree of freedom of disposing the bus bar on the insulating substrate is improved. It features an increased busbar connection structure.

According to the present invention, a bus bar is provided on an insulating substrate to form a bus bar wiring board. A plurality of bus bar wiring boards are stacked to form a laminated circuit body. The first bus bar arranged on the first bus bar wiring board of the multilayer circuit has a first tab-shaped terminal portion with a connection notch formed from the first band-shaped portion side. The second busbar wiring board other than the first busbar wiring board of the laminated circuit body, other tab-shaped terminal portions from other busbars disposed on other busbar wiring boards such as the third busbar wiring board are the first busbar wiring. It protrudes from the tab insertion hole of the plate and enters the connection notch. Thereby, it is easy to change the location of the bus bar provided on the insulating substrate.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show one embodiment of a bus bar connection structure according to the present invention. In this embodiment, a case is described in which the bus bar connection structure is applied to a plurality of bus bars of a laminated circuit body housed in an electric connection box. Further, the same components as those of the conventional example are given the same names, and the detailed description is omitted.

In FIG. 1, this busbar connection structure 1
Is the tab-shaped terminal portion 1 of the first bus bar 11 disposed on the first bus bar wiring board 10 in the laminated circuit body 2
2, a notch 15 for connection is formed in the second bus bar wiring board 20.
The tab-shaped terminal portion 22 of the second bus bar 21 disposed in
This is a connection structure in which the first busbar wiring board 10 is inserted into the connection notch 15 after passing through the tab insertion hole 14. The connection notch 15 is cut into the tab-shaped terminal portion 12 of the first bus bar 11 from the band-shaped portion 13 side, and the tab-shaped terminal portion 22 of the second bus bar 21 is inserted into the connection notch 15. (See FIG. 2).

After the tab-shaped terminal portion 22 of the second bus bar 21 is inserted into the connection notch 15 of the first bus bar 11, a relay as shown in FIG. The terminal 30 is inserted. After the insertion of the relay terminal 30, as shown in FIGS. 4 and 5, the pair of elastic contact portions 31, 31 of the relay terminal 30 are connected to the tab-shaped terminal portions 12, 22 of the first bus bar 11 and the second bus bar 21. Electrically connected. The tab-shaped terminal portions of the bus bar wiring boards other than the second bus bar wiring board 20 (excluding the first bus bar wiring board 10) can be inserted into the connection notches 15. That is,
The tab-shaped terminal of any bus bar wiring board that has come out through the tab insertion hole 14 of the first bus bar wiring board 10 is connected to the notch 1 for connection.
5 is inserted. Reference numeral 40 denotes an upper cover that covers the circuit body 2, and reference numeral 41 denotes a mounting portion for mounting an external connection terminal (not shown) formed on an outer wall of the upper cover.

As described above, the first bus bar 11 has the connection notch 15, and the tab-shaped terminal portion 22 is inserted into the connection notch 15 through the tab insertion hole 14 of the first bus bar wiring board 10.
Is inserted, so that one tab insertion portion 3 of the relay terminal 30 is inserted.
2, two tab-shaped terminal portions 12, 22 are simultaneously inserted. As a result, the bus bar 11 (21) is
Is arranged in a desired place of the insulating substrate 10a (20a), the degree of freedom increases. Also, the same relay terminal 3 as in the prior art
0 can be used, so that components such as the bus bar 11 (21) and the relay terminal 30 when the electric junction box is manufactured are standardized and integrated. Thereby, the manufacturing cost when manufacturing the electric junction box is reduced.

[0013]

As described above, according to the present invention, a connection notch is formed in the first tab-shaped terminal portion of the first bus bar of the first bus bar wiring board from the first strip-shaped portion side, and the first bus bar wiring is formed. Other tab-shaped terminal portions from other bus bar wiring boards such as the second bus bar wiring board other than the board, and the third bus bar wiring board are protruded from the tab insertion holes of the first bus bar wiring board and inserted into the connection notches. Therefore, it is easy to change the location of the bus bar provided on the insulating substrate.

Accordingly, when the bus bars are provided on the insulating substrate, the degree of freedom in the arrangement of the bus bars is increased. Further, in a state where another tab-shaped terminal portion of another bus bar wiring board is inserted into the connection notch formed in the first tab-shaped terminal portion of the bus bar of the first wiring board, the relay terminal can be inserted. Therefore, the same relay terminal as that of the related art can be used, and the type of the relay terminal can be reduced, so that the manufacturing cost of the electric junction box can be reduced.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing an embodiment showing a bus bar connection structure according to the present invention.

FIG. 2 is a view showing a state in which a second tab-shaped terminal is inserted into a connection notch of the first tab-shaped terminal.

3A and 3B are diagrams illustrating a relay terminal, wherein FIG. 3A is a perspective view, and FIG. 3B is a diagram viewed from a direction A in FIG.

FIG. 4 is a cross-sectional view showing a state where the state of FIG. 2 is electrically connected to the relay terminal of FIG. 3;

FIG. 5 is a diagram showing a connection state between a first tab-shaped terminal portion and a second tab-shaped terminal portion and an elastic contact portion in FIG. 4;

FIG. 6 is a sectional view showing a conventional electric junction box.

FIG. 7 is a perspective view of a bus bar used in FIG. 6;

FIG. 8 is a perspective view showing a relationship among a tab-shaped terminal portion, a relay terminal, and a mounting portion.

FIG. 9 is a perspective view showing an intermediate connection terminal;

FIG. 10 is a sectional view showing an electric connection box using the intermediate connection terminal shown in FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bus bar connection structure 2 Laminated circuit body 10 First bus bar wiring board 10a Insulating substrate 11 First bus bar 12 First tab-shaped terminal part 13 First band-shaped part 14 Tab insertion hole 15 Connection notch 20 Second bus bar wiring board 20a Insulation Substrate 22 Second tab-shaped terminal

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-8-50946 (JP, A) JP-A-5-207627 (JP, A) JP-A-3-28971 (JP, A) 33469 (JP, U) Hira 4-54419 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) H01R 31/06 H01R 13/514 H02G 3/16

Claims (1)

(57) [Claims] 1. A busbar is formed by arranging a busbar on an insulating substrate having a tab insertion hole, forming a busbar wiring board, and laminating a plurality of the busbar wiring boards to form a laminated circuit body. In the first tab-shaped terminal portion of the first bus bar disposed on the bus bar wiring board, a connection cutout is formed from the first band-shaped portion side, and another bus bar protruding from the tab insertion hole to the first bus bar wiring board. A bus bar connection structure, wherein the degree of freedom in arranging the bus bar on the insulating substrate is increased by inserting another tab-shaped terminal portion from the wiring board into the connection notch.