JPS59172291A - Printed circuit board connecting device - 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 the Invention The present invention relates to a printed wiring board connection device for three-dimensionally arranging printed wiring boards and electrically connecting them to each other.

Conventional configuration and problems thereof A conventional connection device of this type is constructed as shown in FIGS. 1 to 3. In other words, in case 2 of Figure 1, circuits on a flexible printed circuit board and a rigid printed wiring board are connected, and as shown in Figure 1 a, preliminary solder is applied to the conductor 2 provided on the insulator 1 of the flexible printed circuit board. 3 and a through hole 7 therein, and a preliminary solder 6 is provided on the conductor 6 provided on the insulator 4 of the hard printed wiring board,
Align the preliminary solders 3 and 6 so that they are in contact with each other, insert the tip of the soldering iron through the through hole 7 so that the tip 8 touches the preliminary solder 6, and melt the preliminary solder 3 and 6, as shown in Figure 1. It was connected as shown. In this case, the soldering process of thermally melting the preliminary solders 3 and 6 requires a large-scale jig and tool dedicated to a separate process from the solder dip of the printed wiring board, which requires a lot of man-hours and has poor workability. I couldn't say yes. In addition, the solder surfaces only make surface contact, so the adhesive strength is weak, and it is also necessary to use other parts such as eyelets for protection. Furthermore, once connected, they cannot be easily separated, creating certain limitations in assembly work and service.

Next, a conventional structure for connecting a connector to a flexible printed circuit board will be described with reference to FIGS. 2 and 3. That is, in the case shown in FIG. 2, a terminal member 14 is fixed with solder 16 to an exposed conductor part 13 of a conductor part 12 of a flexible printed circuit board 11 whose coating is peeled off, and then assembled into a housing 16. In the trench shown in FIG. 3, the terminal member 14 is crimped onto the conductor exposed portion 13 of the flexible printed circuit board 11, and is then assembled into the jing 16.

However, in the connector 17 as described above,
The terminal member 14 that makes the electrical connection with the mating connector (not shown) must be soldered or crimped onto the exposed conductor portion 13 of the extremely thin flexible printed circuit board 11, so assembling it requires a lot of work. It takes time and effort, and even after assembly, the bonding force between the terminal member 14 and the exposed conductor portion 13 is weak, so the terminal member 14 is not stable, and therefore good contact cannot be achieved when mating with the mating connector. The drawback was that it was not available. Furthermore, when the terminal member 14 is mounted inside the no-wool puffer 16, if some force is applied to the flexible printed circuit board 11 and the flexible printed circuit board 11 is pulled rearward, in other words, in the opposite direction to the protruding direction of the terminal portion 14, the above-mentioned There is also a drawback that the terminal member 14 may come off from the exposed conductor portion 13. Furthermore, although the assembly workability and serviceability are improved compared to the one shown in Figure 1 above, a complicated preparation process is required to connect the connector terminal part and the flexible printed circuit board, and the work time is as long as 2 hours. Met.

Purpose of the Invention The present invention enables a simple and reliable connection between a dividing printed circuit board such as a hybrid board and a printed wiring board such as an aza printed circuit board to be connected, without using various connectors. The object of the present invention is to provide a connection device that can achieve high-density packaging.

Structure of the Invention In the present invention, the printed wiring board is made into an integrated board by connecting the hard printed wiring part of the rigid printed wiring board and the dividing printed circuit board in advance with a flexible printed wiring board, and A connection hole is provided on the printed circuit board, and a connection copper foil pattern is formed around it.
The connecting portion of the dividing printed circuit board is inserted into the hole, and the copper foil pattern on the dividing printed circuit board and the connecting copper foil pattern are connected.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 4 and 5. FIG. 4 shows a perspective view of a printed wiring board used in an embodiment of the present invention. This printed wiring board 40 has an insulator 40a of a rigid printed wiring board on which a desired circuit pattern is formed, and an insulator 40b of a flexible board on which a desired circuit pattern is formed, which are integrated with an adhesive. In the hard printed wiring board section 41a that connects with the mother printed circuit board, a copper foil pattern 4 for connecting the dividing printed circuit boards 41b and 41c is formed.
A hard printed wiring board is provided on both sides of the mother printed circuit board so as to be continuous with the holes 42.42'. A copper foil pattern 44 and a copper foil pattern 46 of a flexible substrate are formed.

Furthermore, the mother printed circuit board includes a plurality of perforated holes 47, dividing recesses 48, and hard printed wiring board removal portions 4.
6, it is possible to construct the divided printed circuit boards 41b and 41C by attaching various electronic parts (not shown) and dividing them as appropriate after completing the solder dip work. Dividing printed circuit board 4
1b.

Various electronic components are attached to the board 41c, and it is called a hybrid board corresponding to the mother printed board.

The once-divided hybrid board is a perspective view showing the connected state of the dividing printed circuit board 41c, which is completely separated from the mother printed circuit board, and the dividing printed circuit board 41b, which is connected to the mother printed circuit board and integrated with the flexible part 41d, as shown in FIG. As shown in the figure, they are again fitted into the holes 42 and 42 of the mother printed circuit board and soldered to form a three-dimensional arrangement and electrically connect to each other.

7. A plurality of connecting copper foil patterns 44 and 45 are formed on one end edge of the dividing printed circuit boards 41b and 41C to serve as connection terminals, and the dividing printed circuit boards 41b.

The copper foil patterns 44, 45 are formed on the copper foil pattern 41a itself, and both edges of the copper foil pattern 44, 45 are cut out so that the portions where the copper foil patterns 44, 45 are formed are in the shape of protrusions to serve as connection portions 43, 43'. Both ends of the connecting portions 43 and 4* are formed larger than the holes 42 and 42' so that they function as stoppers when the hybrid board is mounted on the mother printed board. By making the protrusion dimensions of the connecting portions 43 and 43' smaller than the material thickness dimension of the printed wiring board 4o, the insulator 4ob of the flexible board remains and is electrically connected only to the copper foil pattern 44 of the rigid printed wiring board. It is also possible to achieve a physical connection.

Generally, the connecting portions 43, 43' are fitted into the holes 42, 42' and are connected to the copper foil pattern 45 of the flexible board by soldering. Copper foil pattern 44 on rigid printed wiring board
Both can be connected by soldering.

In this way, the printed wiring board connection device of this embodiment eliminates the need for large-scale jigs and tools dedicated to the connection points of flexible printed circuit boards, which were the drawbacks of the conventional example, and also eliminates the need for the connection of connector terminals. The present invention does not require a complicated preparation process, simplifies assembly work, and provides a connecting device with excellent reliability and serviceability. Moreover, the parts used in the present invention, such as a printed circuit board and a connector, are not particularly required, and the present invention can be achieved by using many conventionally used parts.

Effects of the Invention As described above, according to the printed wiring board connecting device of the present invention, a printed wiring board is formed in which a rigid printed wiring board portion and a dividing printed wiring board are combined in advance on a flexible printed wiring board, and The hard printed wiring board section is characterized by a hole into which the connection part of the dividing printed circuit board is inserted, so that the dividing printed circuit board and the printed wiring board section can be easily connected.
It has high adhesive strength and excellent workability, and can be effectively used for high-density mounting due to its three-dimensional arrangement.
2. This greatly contributes to the miniaturization of the design.

[Brief explanation of the drawing]

Figures 1a and 1b are explanatory diagrams of a conventional flexible printed circuit board connection method, Figures 2 and 3 are exploded perspective views of a state in which a connector is connected to a conventional flexible printed circuit board, and Figure 4 is an explanatory diagram of a conventional flexible printed circuit board connection method. FIG. 5 is a perspective view of a printed wiring board used in a printed wiring board connecting device according to an embodiment of the present invention, and FIG. 5 is a perspective view showing a connected state of the printed wiring board connecting device according to an embodiment of the present invention. 40... Printed wiring board, 40a... Insulator of rigid printed wiring board, 40b... Insulator of flexible board, 41a... Rigid printed wiring board Part, 41b, C... Printed circuit board for division, 41d
...Flexible part, 42.42'...
・Hole, 43.43'... Connection part, 44...
・・Copper foil pattern of hard printed wiring board, 45・・・・・・
Copper foil pattern of flexible board, 46...Hard printed wiring board removal section, 47...Perforation hole, 48...Four parts for division. Name of agent: Patent attorney Toshio Nakao and one other person
＼ Deaf death-45:

Claims (1)

[Claims] A rigid printed wiring board part serving as a main body and a dividing printed wiring board to be divided from this are integrally provided on a rigid printed wiring board, and a flexible printed wiring board is provided between the rigid printed wiring board part and the dividing printed wiring board. A printed wiring board connecting device, wherein the two parts are connected in advance in a state where they are joined, and a hole is provided in the hard printed wiring board part for inserting and joining the end part of the dividing printed wiring board.