JPS59155195A - Circuit board connecting method - 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 The present invention relates to a method for electrically and mechanically connecting wiring boards.

[Prior art]

Flexible wiring boards, e.g. flexible printed boards (FP)
C) and a general wiring board that can be considered to be substantially rigid are usually connected by soldering. However, this connection method has the disadvantage that the connection work is time-consuming. Furthermore, since it takes time and effort to remove the wiring board once connected, there is a drawback that replacing the wiring board is extremely difficult.

Furthermore, instead of directly soldering the wiring boards, a method has also been adopted in which the wiring boards are connected through a connector. According to this method, the wiring board can be easily replaced. but,
Since the connection between the connector and the wiring board generally needs to be made by soldering, the overall efficiency of the connection work cannot be improved much, and since the connector is relatively expensive, the connection cost increases considerably. There is.

[Purpose of the invention]

An object of the present invention is to provide a wiring board connection method that solves the drawbacks of the conventional methods as described above.

[Summary of the invention]

The present invention uses a simple connecting member to electrically and mechanically connect, for example, a flexible wiring board and a substantially rigid wiring board in an easily attachable and detachable manner.

More specifically, the wiring board connection method according to the present invention includes:
For example, a flexible first wiring board and a substantially rigid second wiring board are overlapped, and from the side of the first wiring board that does not face the second wiring board, a protrusion of paulownia wood is connected to the first wiring board. A part of the wiring board is bent and pushed into the opening formed in the second wiring board, and a part of the first wiring board is pushed into the second wiring board by a pressing part that is retreated from the protrusion of the connecting member. The connecting member is fixed to the second wiring board while being pressed against the wiring board.

[Embodiments of the invention]

FIG. 1 is a perspective view for explaining one embodiment of the present invention, showing a state in which a wiring board 1 that can be considered to be substantially rigid and a flexible wiring board 8 are connected by a connecting member 2. FIG.

FIG. 2 is a perspective view showing details of the wiring board 1.8 and the connecting member 2. FIG. In the figure, an opening 4 long in the width direction of the wiring board is formed at the end of the wiring board l, and two connection pads 6 are connected to connection turns 5 along both side edges of the opening 4. They are arranged in rows. The other wiring board 8
Also, along the edge thereof, connection pads 7 are formed in two rows. 8 is a drawer turn connected to the connection pad 7. The connecting member 2 includes a top plate 9, a protrusion 10 extending downward from the top plate 9, and a top plate 90.
It has locking claws 11 extending from both ends, and is integrally formed of a somewhat flexible material.

8 is a cross-sectional view taken along the line AA' in FIG. 1, and FIG. 4 is a cross-sectional view taken along the line B-B' in FIG. Moreover, FIG. 5 is a sectional view corresponding to FIG. 8 showing a state before connection.

The connection work and the state after connection will be explained with reference to each figure.

For connection, as shown in FIG. 5, connection pads 6 arranged inside opening 4 on wiring board l and connection pads 7 arranged outside on wiring board 8 The corresponding parts are positioned so that they are in contact with each other, and the ends of the wiring board 8 are pressed against the wiring board 1 using, for example, fingers. In this state, press the connecting member 2 downward from the upper side of the wiring board 8,
A part of the wiring board 8 is bent by the projection 10 as shown in FIG. 8 and pushed into the opening 4. Note that the portion of the wiring board 8 into which the wiring board 8 is pushed may be bent and shaped in advance. As the wiring board 8 is pushed in, the unpressed portion of the wiring board 8 moves to the left in the figure, and corresponding connection pads 6.7 in two rows on the wiring board 1.degree. 8 face each other. On the other hand, the tip of the locking claw 11 has an arcuate surface 12. are formed, and when the connecting member 2 is pressed down, the arcuate surface 12 slides into engagement with both ends of the opening 4. When the connecting member 2 is further pushed down, the arcuate surface 12 comes off the end of the opening 4 as shown in FIG. 4, and the locking claw 11 opens outward by its own elasticity.
The connecting member 2 is locked and fixed to the wiring board l. In this state, as shown in FIG. 8, the wiring board 8 is pressed against the wiring board l by the top plate part 9 (suppression part) K of the connection member 2, and the corresponding connection pads 6 and 7 come into strong contact with each other. electrical connection is made. In addition, the wiring board 8 is not only pressed against the wiring board 1 by the lower surface of the top plate portion 9, but also partially pushed into the opening 4 by the protrusion 10, so that the wiring board l.

8 are mechanically connected with sufficient strength.

To release the connection, simply push the locking pawl 12 inward and pull up the connecting member 2.

In this way, wiring boards can be easily connected and detached using one simple connecting member.

However, in order to prevent damage and disconnection due to bending of the wiring board 8, if necessary, the portion of the wiring board 8 to be pushed into the opening 4 may be bent in advance.

Further, the lower end of the protruding portion 10 of the connecting member 2 may be rounded to eliminate the corner portion.

6 and 7 show modified examples of the connecting member 2, and are cross-sectional views taken at positions corresponding to FIG. 4. 6th
In the illustrated modification, spring pieces 11α are implanted at both ends of the top plate portion 9 as locking claws 11. FIG. 7 shows the projection 10
In this example, a pair of protrusions 18 are formed at both ends of the lower surface of the wiring board 8 at intervals approximately equal to the width of the wiring board 8, and the wiring board 8 is positioned in the width direction by guiding each side edge of the wiring board 8 with the projections 18. be.

Note that the same positioning effect as that of the protrusion 18 can also be achieved by making the width of the opening 4 approximately equal to the width of the wiring board 8 and having both ends of the opening 4 guide both sides of the wiring board 8.

In this case, apart from the opening 4, a hole for inserting and locking the locking pawl 11 is provided in the wiring board 1, or a locking pawl is provided at the side end of the wiring board 1 so that the locking pawl 11 is locked. 11 will be partially changed.

FIGS. 8 to 10 are cross-sectional views showing still other modifications of the connecting member 2. FIG. These modified examples are intended to provide elasticity to the suppressing portion of the connecting member 2 to make the contact between the connecting pads 6 and 7 more stable.

In the modification shown in FIG. 8, the top plate part 9, which acts as a suppressing part, is formed so as to be inclined downward.

In the connected state, the top plate portion 9 is deformed almost horizontally, so that its restoring force uniformly applies a strong pressing force to the wiring board 8, thereby ensuring that the connection pads 6.7 come into contact with each other. In the modification shown in FIG. 9, a leaf spring 14 is attached to the lower surface of the top plate 9, and this leaf spring 14 acts as a pushing and pressing part similar to the top plate 9 of FIG. In the example shown in FIG. 10, a rubber material 15 is provided on the lower surface of the top plate portion 9 to achieve the same effect.

Note that each connection pad 7 on the wiring board B may be connected to an independent lead-out pattern 8, as shown in FIG. (good), as shown in FIG.
It may also be possible to connect to. The wiring form of such connection pads is basically arbitrary, and the same applies to the wiring board 1.

Further, in the embodiment described above, the connection pads 6.8 on the wiring board 1.8.
7 are arranged in two rows, but they can also be arranged in one or three or more rows.

Such an embodiment is shown in FIG. This figure is a sectional view corresponding to FIG. 8, and parts equivalent to those in FIG. 3 are given the same reference numerals. Further, the parts not shown are the same as those in the embodiment or modification described above.

In this embodiment, the connection pads 6 on the wiring board 1 are arranged in one row along the inside of the opening 4, and the connection pads 7 on the wiring board 3 are also arranged in one row. Top plate part 9
The right half of the figure is made thicker than the left half by the thickness of the connection pad 6.
is firmly pressed against the wiring board l.

FIG. 14 is a cross section corresponding to FIG. 18 showing still another embodiment of the present invention, and parts equivalent to those in FIG. 18 are given the same reference numerals. Further, parts not shown in the figure are similar to the embodiment shown in FIG. 18.

In this embodiment, the wiring board 8 is pressed while a sheet member 16 having elasticity and conductivity such as unidirectional conductive rubber is interposed between the connection pads 6.7. In this way, variations in the suppressing force can be absorbed by the sheet member 16, and all of the connection pads 6.7 can be electrically connected via the sheet member 16 under uniform conditions.

It should be noted here that the present invention can also be applied to connections between flexible wiring boards. That is, by reinforcing one of the wiring boards with a suitable reinforcing plate so that the wiring board can be regarded as a substantially rigid wiring board, each of the above embodiments can be applied and connected as is.

In this case, it goes without saying that openings (4) are also formed in the reinforcing plate.

〔Effect of the invention〕

As detailed above, according to the present invention, wiring boards can be quickly and easily connected and disconnected using extremely simple and inexpensive connecting members, without the need for labor-intensive soldering or expensive connectors. can be connected to.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention, and FIG. 2 is a perspective view showing one embodiment of the present invention.
An exploded perspective view showing each part in the figure, Figure 8 is A- of Figure 1.
4 is a sectional view taken along line B-B' in FIG. 1, FIG. 5 is a sectional view for explaining the connection work, and FIGS. 6 to 1θ show modified examples of the connecting member. Cross-sectional views shown in FIGS. 11 and 12. The figures are plan views illustrating the connection form between the connection pads on the wiring board and the lead-out pattern, Figures 18 and 14.
The figures are sectional views showing different embodiments of the present invention. 1.8... Wiring board, 2... Connection member, 4... Opening, 6.7... Connection pad, 9... Top plate part (suppressing part)
, lO... protrusion. Fig. 6 Off Fig. O Fig. 8-A-P9 Fig. U Fig. 10

Claims (3)

[Claims] (1) Overlap the first wiring board and the second wiring board, and from the side of the first wiring board that does not face the second wiring board, use the protrusion of the connecting member to connect a part of the first wiring board. is bent and pushed into the opening formed in the second wiring board, and a part of the first wiring board is pressed against the second wiring board by a suppressing part that is retreated from the protrusion of the connecting member. A method for connecting wiring boards, characterized in that the first wiring board and the second wiring board are connected to each other mechanically and mechanically by fixing the connecting member to the second wiring board. (2) A method for connecting wiring boards according to claim 1, characterized in that a member exhibiting elasticity and conductivity is interposed between the first wiring board and the second wiring member. (3) Claims characterized in that the protrusion of the connecting member is formed with a protrusion that engages with each edge of the first wiring board to position the first wiring board in the width direction. The wiring board connection method according to item 1.