JPH0438543Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a composite wiring board in which a plurality of wiring boards are stacked and combined into one.

(Prior art) Conventionally, this type of composite wiring board is as shown in Figure 4.
Generally, a plurality of wiring boards 1, 2, and 3 each having a wiring pattern and an insulating layer on at least one surface are stacked and fixed by sandwiching and pasting double-sided adhesive tape 4 between each of the wiring boards 1, 2, and 3.

(Problem that the invention aims to solve) However, in the conventional structure, the more wiring boards to be stacked, the more double-sided adhesive tape is used, which means that the number of parts increases and it takes time to stack them. Moreover, since the double-sided tape must be placed between each wiring board, it is difficult to automate assembly.

Therefore, an object of the present invention is to eliminate the drawbacks of the prior art described above, reduce the number of parts, shorten assembly time, and facilitate automation of assembly.

(Means for Solving the Problems) In order to achieve the above object, the present invention stacks at least two wiring boards and attaches them together using an adhesive sheet at the opening of the other wiring board where the surface of one wiring board is exposed. It has a pasted structure.

(Example) An example of the present invention will be described below with reference to FIGS. 1 and 3. Flexible wiring boards 11, 12, 13
A wiring pattern is formed on each surface, and desired positions are insulated with an insulating protective film. The wiring boards 11 and 12 are provided with round holes 11a and 12a and rectangular holes 11b and 12b at the same position, and the wiring board 11 is provided with a rectangular hole 11c in addition to the above-mentioned holes. cover sheet 14
An adhesive layer is provided on the lower surface of. Cover sheet 14 and the flexible wiring board 11, 12, 1
3 are superimposed and pasted together, the wiring board 12 is bonded to the cover sheet through the hole 11c provided in the wiring board 11, and the wiring board 13 is bonded to the cover sheet through the hole 11c provided in the wiring board 11, and the wiring board 13 is bonded to the hole 11c provided in the wiring board 11, 12. Hole 11
a, 12a and rectangular holes 11b, 12b to be bonded to the cover sheet. In this way,
The wiring boards 11, 12, and 13 are stacked and fixed together to form a composite wiring board.

FIG. 3 is a cross-sectional view schematically showing the structure of this composite wiring board.

Another embodiment of the present invention will be described with reference to FIG. Each of the flexible wiring boards 21, 22, and 23 has a wiring pattern formed on its surface and is insulated at a desired position by an insulating protective film. Wiring board 2
Notches 25a and 25b are formed at the same position in 1 and 22, and a notch 24 is formed in wiring board 21 in addition to the above-mentioned notches. An adhesive layer is provided on the lower surface of the cover sheet 20. cover sheet 2
0 and the flexible wiring boards 21, 22, 23
When the wiring board 22 is overlaid and bonded, the wiring board 2
The wiring board 23 is bonded to the cover sheet through the notch 24 provided on the side of the wiring board 21, 22, and the wiring board 23 is bonded to the cover sheet through the notch 25a, 25b provided at the same position on the wiring boards 21, 22. Glued. In this way, the wiring boards 21, 2
2 and 23 are stacked and fixed together to form a composite wiring board. In the above embodiments, the wiring board was described as being flexible, but the wiring board is not limited to being flexible; it may be a hard wiring board, or it may be a hard wiring board. It may also be combined with a flexible wiring board. Furthermore, in the embodiment, three wiring boards are laminated and bonded together, but it goes without saying that the number of wiring boards is not limited to three, and the size of each wiring board can also be set arbitrarily. can. Further, the number of cover sheets need not be limited to one, and may be divided into several sheets.

[Effect of the invention] As explained above, according to the invention, at least two wiring boards are stacked one on top of the other, and the two are pasted together using an adhesive sheet at the opening of the other wiring board where the surface of one wiring board is exposed. This eliminates the need to use double-sided adhesive tape, making it easier to handle and reducing the number of parts, which shortens assembly time and facilitates assembly automation.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the composite wiring board of the present invention. FIG. 2 is a schematic cross-sectional view of the one shown in FIG. FIG. 3 is an exploded perspective view showing another embodiment of the composite wiring board of the present invention. FIG. 4 is an exploded perspective view showing a conventional composite wiring board. 14,20...Cover sheet, 1,2,3,1
1, 12, 13, 21, 22, 23... Flexible wiring board, 4... Double-sided adhesive tape, 15... Adhesive, 11a, 11b, 11c, 12a, 12b...
...hole, 24, 25a, 25b...notch.

Claims (1)

[Scope of utility model registration request] A composite wiring board characterized in that at least two wiring boards are stacked one on top of the other, and both are adhered with an adhesive sheet at an opening in the other wiring board where the surface of one wiring board is exposed.