JPS5910898Y2 - Assembly type busbar circuit - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a busbar circuit, and more specifically, the present invention relates to the structure of a busbar circuit, and more specifically, to connect a busbar circuit with another busbar circuit or with a terminal for connecting an external circuit so that an arbitrary circuit network can be constructed by assembling the busbar circuit and other busbar circuits or external circuit connection terminals. The present invention relates to a prefabricated busbar circuit.

For example, the number of electrical components installed on field vehicles has been increasing in recent years due to exhaust gas countermeasures and improved safety.
The number of electric wires has also increased dramatically.

In order to cope with this problem, a power distribution box has been proposed in which various electrical circuit units such as a large number of fuses and relays are integrated and incorporated.

The basis of such a power distribution box is a circuit board such as a printed circuit board or a busbar circuit board, or a laminated circuit board made by stacking a plurality of these circuit boards. It has a structure as shown in Figure 2.

That is, the busbar circuit board A has a busbar circuit 2 disposed on an insulating substrate 1, and the circuit 2 has a base circuit 3 connected to a plurality of branch circuits 4 to 7, and each circuit 3 and 4 to
At the end of 7, there is provided a terminal 8 or 8' for external circuit connection.

Note that the terminal 8' is erected downward with respect to the circuit, and protrudes from the terminal insertion hole 9 to the lower surface of the insulating substrate 1.

Conventionally, such a busbar circuit 2 is manufactured by punching out a busbar circuit blank 2' having a preset desired pattern from a single metal plate B using a die, as shown in FIG. This was done by bending the ends of terminals 8 and 4' to 7' along dotted lines P to form the terminal 8 or 8'.

However, according to this method, the remaining portion S after punching out the busbar circuit board 2' is completely wasted, and depending on the shape of the busbar circuits 2, 2', a large mold is required. If it is necessary to provide the terminals 8, 8 of the branch circuits 4, 6 facing each other, there is a problem that they overlap with each other, resulting in severe restrictions in terms of design and manufacturing.

The present invention was developed with attention to the points mentioned above, and it is possible to reduce waste by minimizing the remaining punched parts when forming a busbar circuit, and to use a relatively small mold, while also being able to overcome design and manufacturing constraints. To provide an assembly-type busbar circuit that is difficult to manufacture, generally inexpensive, and easy to manufacture.

Next, an example will be described.

In FIG. 3 and FIG. 4 a, l), 3A indicates a base circuit, and 4A to 7A indicate branch circuits, respectively.
and 4 to 7, and 8A and 8A' are terminals corresponding to the terminals 8 and 8'.

These branch circuits 4A, 6A, and 7A are the base circuit 3
Terminals 8A and 8A' are divided into circuits 3A and 8A' respectively.
4A to 7A are divided and connected to each other by assembly.

[Connection of base circuit and branch circuit]

A connecting convex portion 10 lined with a protrusion 11 is provided protrudingly in the intermediate portion of the base circuit 3A, while a connecting concave portion 12 for the connecting convex portion 10 is provided in a stepped shape at one end of the branch circuit 4A. In addition to providing crimp support pieces 13 on both sides, the protrusion 1
A fitting hole 14 is opened for the hole 1 (FIG. 4a).

The base circuit 3A and the branch circuit 4A are connected by fitting the connecting protrusion 10 into the connecting recess 12, protruding the protrusion 11 from the fitting hole 14, and tightening the crimp supporting piece 13, thereby connecting the circuits 3A and 4A. can be easily positioned and connected.

The length of the crimping supporting piece 13 may be shortened depending on the case, and the length may be shortened to form a kind of guide plate, or as shown in FIG. It can also be connected and fixed using the same method.

In this case, the crimp supporting piece 13 serving as a guide plate prevents wobbling between the circuits.

In addition, in the case of connection between circuits such as the base circuit 3A and the branch circuit 4A, it is completely free to provide the connection convex portion 10 and the connection concave portion 12, and it may be determined in advance depending on the structure of the entire busbar circuit. All you have to do is decide.

[Connection of each circuit and connection terminal]

On the other hand, the other end of the branch circuit 4A is provided with a connecting convex portion 10 with a protrusion 11, as in the case of the base circuit 3A, and the horizontal plate portion 15 of the terminal 8A is provided with a crimp clamping piece as described above. 13 and a fitting hole 14 (FIG. 4b).

In this case, the connection and fixing between the branch circuit 4A and the terminal 8A is exactly the same as described above.

Thereafter, the divided branch circuits 4A, 6A and 7A are connected and fixed to the base circuit 3A in the same manner, and each circuit 3A to 7A is connected and fixed to the base circuit 3A.
By connecting and fixing the terminal 8A or 8A' to the end of A, the busbar circuit 2 having the same circuit structure as that shown in FIG. 1 is assembled.

According to the present invention, busbar circuits and terminals for connecting external circuits, which were conventionally punched integrally from a single metal plate, can be divided into base circuits or branch circuits and terminals as needed. By adopting this method, there is less leftover punching, which reduces waste of material and prevents the mold from becoming larger.

In addition, the base circuit, branch circuit, and terminals connected and fixed to each circuit can be easily manufactured without being subject to conventional design constraints by defining and standardizing several simple basic structures. Can be done.

Furthermore, by connecting and fixing circuits and terminals with these basic structures, special equipment is not required for both small-lot, high-mix, and high-volume circuit configurations, ranging from simple to complex circuit configurations. It can be manufactured easily and inexpensively.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an example of a conventional busbar circuit board, Fig. 2 is an exploded view showing the manufacturing process of the busbar circuit, and Fig. 3 is a perspective view showing an example of a conventional busbar circuit board.
The figure is a plan view of the prefabricated busbar circuit of the present invention in a separated state, and Figure 4 a and l) are perspective views of the main parts, where a is the connection between the circuits, and b is the connection between the circuits and the connection terminals. FIG. 5 is a sectional view of a main part showing another connection state of the present invention. 2...Busbar circuit, 3A...Base circuit, 4A to 7A...Branch circuit, 8A, 8
A'...Terminal, 10...Connection protrusion, 11
...Protrusion, 12...Connection recess, 14.
...Insertion hole.

Claims (1)

[Scope of utility model registration request] A base circuit and a branch circuit are connected to each other and consist of a busbar circuit and a terminal for external circuit connection connected to this busbar circuit. In the connecting part, a connecting convex part or a connecting concave part having a projection is provided on one side, and a connecting concave part or a connecting convex part having a fitting hole for the protrusion is formed on the other side, and a crimp clamping piece is provided in the connecting concave part. A prefabricated busbar circuit featuring a hollow feature.