JPH08236895A - Printed board - Google Patents

Abstract

PURPOSE: To improve the storage efficiency of a board and reduce the number of processes at low cost by combining a plurality of printed boards by connecting them by a conductor which electrically connects the boards and also operates as a hinge. CONSTITUTION: A flexible conductor 11 is inserted into each conductor mounting hole of a printed board 21 and a separate board 25. Then, an electronic component 8 and the conductor 11 is soldered at one time, the temporary junction part 10 of the separate board 25 is separated by cutting at the inserting port 15 by nippers. The separate board 25 is bent at the conductor 11 vertically to the printed board 21, and the separate board forms three-dimensional body with the plurality of printed boards 2 which form a flat body. Thus, the separate board 25 is erected by bending the conductor 11. Since the conductor 11 also electrically connects the printed board 21 and the separate board 25, the conventional connecting operation is eliminated. Therefore, the storage efficiency of the board is improved and the number of processes is reduced at low cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for joining and fixing and electrical connection of a printed wiring board which is mounted on a plurality of sheets.

[0002]

2. Description of the Related Art FIG. 7 is a perspective view showing a method of connecting a conventional printed wiring board to another printed wiring board, and FIG. 8 is a joint showing a state in which the printed wiring board is connected to another printed wiring board. It is sectional drawing of a part.

Reference numeral 1 is a flat printed wiring board, 2 is a conductor pattern extending in parallel to both end surfaces of the printed wiring board, and 3 is a printed wiring board 1 corresponding to the conductor pattern 2.
L-shaped terminals, which are provided on both end surfaces in a substantially single line, are solders for connecting the conductor patterns 2 and the terminals 3.

On the other hand, 5 is another flat printed wiring board, and 6
Are soldering holes formed in the printed wiring board 5 in two rows corresponding to the terminals 3, 7 are conductor patterns individually extended in the holes 6 on the printed wiring board 5, and 8 is an electronic component. The printed wiring board 5 is connected by solder 9 so that the printed wiring boards 1 and 5 are connected and fixed and electrically connected.

As a second conventional example, Japanese Patent Publication No. 63-2.
As shown in Japanese Patent No. 73391, a printed wiring board having an inverted U-shaped cross section made of a metal base substrate material is provided with a conductor pattern extending to the vicinity of an end face, and a hole is provided in the other square printed board. There is also one in which a metal base substrate and a printed wiring board are mechanically and electrically connected by being inserted into a conductor pattern extending in a hole.

Further, as a third conventional example shown in FIG. 9, the printed wiring board 1 and another printed wiring board 5 are connected by a flexible board 17, and the flexible board 17 itself is bent to form another printed wiring board. There is also one in which the printed wiring boards 1 and 5 are mechanically and electrically connected to each other by a mounting jig 18 provided on the printed wiring board 1.

[0007]

In the first conventional method as described above, in order to connect the printed wiring boards 1 and 5 to each other, the printed wiring boards 1 and 5 are preliminarily connected to the electronic component 8 respectively.
Since it is necessary to solder each of the L-shaped terminals 3 after assembling and to assemble them, the number of man-hours is increased due to an increase in the soldering process in the post process.

Also, in the second conventional example in which a metal base substrate having an inverted U-shaped cross section is inserted, after the electronic components are soldered and assembled to the printed wiring board as described above, they are soldered in the post-mounting step. There are problems that the number of processes is increased, the number of steps is increased, and the metal base substrate itself is expensive.

Also, in the third conventional example, even in the conventional example using the flexible substrate 17, the flexible substrate 17 itself is expensive. Flexible substrate 1
In the case of 7 alone, the printed wiring boards 1 and 5 cannot be fixed and the mounting jig 18 is required, so that there is a problem that the assembly cost and the mounting jig cost are required.

SUMMARY OF THE INVENTION The present invention is intended to solve the above problems, and an object thereof is to provide a plurality of combined printed wiring boards which improve the storage efficiency of substrates and are inexpensive and reduce the number of steps. And

[0011]

In order to solve this problem, the present invention provides a printed wiring board in which a plurality of printed wiring boards carrying electronic components are combined to form a circuit. The printed wiring board is formed by combining a plurality of printed wiring boards with a conductor having both electrical connection and hinge structure.

The conductor is flexible and is used by bending. Further, a cutout is provided in the center of the conductor. Further, the printed wiring board bent by the conductor is supported by the supporting portion. The printed wiring board to be bent is in a state of being connected to the printed wiring board to be a base at a temporary joining portion.

[0013]

According to the present invention, by connecting a multi-wiring printed wiring board with a flexible conductor, it is possible to simultaneously mount electronic components on a printed wiring board that is mounted in combination with a large number of printed wiring boards.
The workability is improved by eliminating the step of connecting printed wiring boards.

Further, since it is a flexible conductor, the flexible body itself can be electrically connected and has a mechanical strength. Therefore, it can be supported by a flexible conductor when bent. It becomes possible and the bending angle can be freely set. Further, by providing a cutout in the bent portion of the flexible conductor, the force acting on the substrate during bending of the flexible conductor is minimized. When the mounting is made stronger than that, the space can be effectively utilized by providing a structure in which the bent substrate can be connected by the fixing pin.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
Will be described with reference to. In FIG. 1, reference numeral 21 is a single dividable printed wiring board 21, and a divided printed wiring board 25 (hereinafter referred to as a divisor) is formed, for example, a printed wiring board capable of separating one corner of the printed wiring board 21. I'll do it. One side of the dividing plate 25 has cut surfaces 21a and 25a that are cut from the original printed wiring board 21 serving as a base, and the other side which is perpendicular to the one side has the dividing plate 25 and the printed wiring board 21 on the substrate sewing machine. A temporary joining portion 10 joined by eyes or V-cut is formed. Then, in the vicinity of the cut surfaces 21a and 25a, the conductor mounting holes 16 are formed in the printed wiring board 21 and the division plate 25, respectively.
Is perforated. Reference numeral 11 denotes a conductor made of a conductive material such as copper or aluminum, which is flexible and is formed by bending a flat plate into a U-shape.

Next, separation and formation of the division plate 25 from the printed wiring board 21 will be described. First, the electronic component 8 is mounted on the division plate 25 and the printed wiring board 21 by a mounting machine, a component mounting machine, or the like. Subsequently, as shown in FIG. 2, the flexible conductor 11 is inserted and mounted in the conductor mounting holes 16 of the printed wiring board 21 and the division plate 25. Then, the electronic component 8 and the conductor 11 are collectively soldered, and the temporary joint portion 10 of the division plate 25 is separated at the insertion port 15 by a nipper. After that, the conductor 11 is bent and formed, for example, as shown in FIG. 3, so that the division plate 25 is at a right angle to the printed wiring board 21 and divided into a large number of flat printed wiring boards 21. The plate 25 is made three-dimensional (see FIG. 6).

Here, if the flexible conductor 11 is
The flexible board 17 can be easily bent, but since it is soft and insufficient in terms of mechanical strength, the division plate 25 cannot be erected on the printed wiring board 21, but in the present embodiment. This is possible because the conductor 11 is flexible. Further, if the material of the printed wiring boards 21 and 25 is a hard printed wiring board such as glass epoxy or paper phenol, it cannot be bent, but by bending the conductor 11, the division plate 25 can be erected.

Also, the printed wiring boards 1 and 5 shown in the conventional example.
In the method of connecting with the L-shaped terminal 3 or the method of bending and connecting the metal base substrate, the printed wiring boards 1 and 5 are assembled separately, and then the printed wiring boards 1 and 5 are connected to each other. I had to do extra. However, in the present embodiment, the printed wiring board 21 and the dividing plate 25 also serve as an electrical connection in the conductor 11, so that the conventional connection work is unnecessary.

(Other Embodiments) As shown in FIG. 4, the stress generated when the printed wiring board 25 is bent is reduced by the printed wiring board 2.
In order to prevent the electronic parts 8 and the soldering parts mounted on the printed circuit board 5 from being affected, a cutout 12 is provided at the center of the flexible conductor 11 to concentrate the load at the time of bending, and the printed wiring board 2
Improve the reliability of 5.

As shown in FIG. 5, the printed wiring board 25 bent at the flexible conductor 11 is provided with the support portion 16, and the printed wiring board 25 is provided with one or more fixing pins 13. After bending, the printed wiring board 21 and the printed wiring board 25 may be firmly fixed by fixing the printed wiring board 21 and the fixing pin 13 with the support portion 16.

Further, the conductor 11 is formed by bending a flat plate into a U-shape, and an insulating coating is formed on the surface of the flat plate to maintain electric insulation with respect to other parts. In addition, instead of a flat plate, the conductors are formed in a bundled state of the insulated electric wires. In this case, the effect that the printed wiring board 21 and the division plate 26 can be electrically connected to each of the electric components 8 is added.

Further, a second dividing plate is attached to the dividing plate 26 via the conductor 11, and the second dividing plate is arranged in parallel with the printed wiring board 21 or is arranged in parallel with the dividing plate 26 to effectively utilize the space. it can.

As described above, the printed wiring board 21 and the dividing plate 25
After mounting the electronic component 8 on each of them and inserting and connecting the conductors 11 into the respective conductor mounting holes 16, batch soldering is performed in the soldering process, so that the post-mounting process required for connection between the printed wiring board 21 and the dividing plate 25 There is an effect that it can be deleted and the man-hour can be significantly reduced.

Further, by providing the notch in the flexible conductor 11, the bending stress does not act on the printed wiring boards 1 and 5 at the time of bending, and the quality at the time of bending is improved.
Alternatively, since a large number of printed wiring boards, which were planar bodies, can be made into three-dimensional bodies, a large number of printed wiring boards can be set in a product, and space can be effectively utilized. Further, after the standing, the printed wiring board can be fixed more firmly by providing the printed wiring board with the fixing pin and the printed wiring board with the supporting portion. Since the conductor is a conductive material and has flexibility, it has the effect of firmly supporting the printed wiring board for electrical connection and also serving as a hinge mechanism.

[0025]

As described above, according to the present invention, since a large number of mounting printed wiring boards can be connected to each other by using a flexible conductor in one step, the number of steps can be significantly increased. It can be reduced. Further, since the flexible conductor portion can be bent at an arbitrary angle to form a cubic shape, it contributes to downsizing of the product and space saving.

Alternatively, by providing the notch in the flexible conductor, stress is not applied to the printed wiring board at the time of bending so that the quality can be improved, and after the bending, the printed wiring board is fixed with the fixing pin. By fixing it, it becomes possible to firmly fix it, and it becomes possible to hold it at a place where strong fixing is required due to vibration or the like.

[Brief description of drawings]

FIG. 1 is a perspective view of a printed wiring board according to an embodiment of the present invention,

2 is a cross-sectional view of the joint portion of FIG. 1,

FIG. 3 is a sectional view of the printed wiring board when it is bent,

FIG. 4 is an explanatory view of a notch portion of a conductor,

FIG. 5 is a diagram showing how the printed wiring board is attached,

FIG. 6 is a view showing a state where the divided printed wiring board is erected,

FIG. 7 is a view equivalent to FIG. 1 of the related art,

FIG. 8 is a cross-sectional view showing a conventional method for joining printed wiring boards,

FIG. 9 is a perspective view showing flexible joining of a conventional printed wiring board.

[Explanation of symbols]

1, 5, 21 ... Printed wiring board, 2, 7 ... Conductor pattern, 8 ... Electrical component, 10 ... Temporary joint part, 11 ... Conductor, 12 ... Notch part,
13 ... Fixed pin, 26 ... Split printed wiring board.

Claims (5)

[Claims] 1. A printed wiring board in which a circuit is formed by combining a large number of printed wiring boards on which electronic parts are mounted, and the plurality of printed wiring boards are connected by a conductor having both electrical connection and hinge configuration. A printed wiring board characterized by being formed in combination with each other. 2. The printed wiring board according to claim 1, wherein the conductor has flexibility and is used by bending. 3. The printed wiring board according to claim 2, wherein a notch is provided in the center of the conductor. 4. The printed wiring board according to claim 1, wherein the printed wiring board bent by a conductor is supported by a supporting portion. 5. The printed wiring board according to claim 1, wherein the bent printed wiring board is connected to the printed wiring board as a base at a temporary joint portion.