JPH05129042A - Connecting device for printed wiring board - Google Patents

Abstract

PURPOSE:To connect printed wiring boards to each other without using a connector. CONSTITUTION:Stators 2 and connecting terminals 3 are provided in the first small printed wiring board 1, and in such a constitution that through holes 6 connected to a wiring pattern fitted to the connecting terminals 3 and square holes 5 fitted to the stators 2 are provided in the second wide area printed wiring board 4, the connecting terminals 3 are penetrated into the through holes 6 and the stators 2 are also penetrated into the square holes 5, and they are soldered together. Thereby, electrical connection between mutual printed wiring board circuits can be carried out, and structural connection between the mutual printed wiring boards car be also carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed wiring board connecting device for connecting printed wiring boards used in electronic equipment to each other without using a connector.

[0002]

2. Description of the Related Art In recent years, electronic devices have made remarkable progress in terms of higher performance, smaller size, and lower price. For example, in personal computers and workstations, products that have a high processing speed and a large-capacity semiconductor memory and are small enough to be installed on a desk have appeared on the market at a low price. In such a device, it is necessary to mount electronic circuits at a high density in a small case, and a small first printed wiring board is mounted on a second printed wiring board having a large area. I often take it. In addition, in such a device, it is necessary to reduce the number of parts in order to suppress the material cost and the number of assembling steps.

A conventional printed wiring board will be described below. As shown in FIG. 4, the protrusions 9 of the connector 15 attached to the second printed wiring board 14 are fitted into the holes 12 provided in the first printed wiring board 11, and the first printed wiring board 11
And the second printed wiring board 14 are structurally connected.

Further, the connection terminals 1 of the wiring pattern aligned with the edge of the first printed wiring board 11 arranged at intervals corresponding to the intervals between the connection terminals 10 of the connector 15 and the connection terminals 10.
The circuit 3 on the first printed wiring board 11 and the circuit on the second printed wiring board 14 are electrically connected to each other by 3 contacting the respective connection terminals. The surface of the connection terminal 13 is generally plated with gold or the like to prevent contact failure due to corrosion of the surface of the connection terminal 13.

[0005]

However, in the above-mentioned conventional configuration, since the connector 15 is required to connect the first printed wiring board 11 and the second printed wiring board 14, the material cost of the connector 15 and the connector are increased. There is a problem that the number of steps for attaching 15 to the second printed wiring board 14 is increased and the cost is increased.

The present invention solves the above-mentioned problems of the prior art by connecting printed wiring boards to each other without using a connector, thereby reducing the cost, and preventing cutting of a wiring pattern on the printed wiring board. Moreover, it is an object of the present invention to provide a printed wiring board connecting device capable of increasing the number of terminals of a circuit of the printed wiring board.

[0007]

In order to achieve this object, a printed wiring board connecting device of the present invention has a second printed wiring board in which a connection terminal and a fixed foot are provided on a first printed wiring board. A through hole connected to a wiring pattern to be fitted to the connection terminal and a square hole to be fitted to the fixed foot are provided in the structure.

[0008]

With this structure, the connection terminal is pierced through the through hole and is connected by soldering to electrically connect the circuit on the first printed wiring board and the circuit on the second printed wiring board to fix the fixed foot. The first printed wiring board and the second printed wiring board are structurally connected by penetrating the square hole and connecting with solder.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a first printed wiring board 1
Forms one printed wiring board including the fixed foot 2. The front and back of the fixed foot 2 are solder-plated and processed so that they can be easily soldered later. The connection terminal 3 is fixed to the first printed wiring board 1 and is connected to the wiring pattern of the circuit on the first printed wiring board 1.
Lands are provided around the square holes 5 on the solder surface of the second printed wiring board 4. The through hole 6 is connected to the wiring pattern of the circuit on the second printed wiring board 4.

A method of connecting the first printed wiring board 1 and the second printed wiring board 4 configured as described above will be described. As shown in FIG. 2, the fixing feet 2 of the first printed wiring board 1 are penetrated into the square holes 5 on the second printed wiring board 4, and then the corners of the solder surface of the second printed wiring board 4 are angled. Hole 5
The land around and the fixed foot 2 are connected with solder 7.

As shown in FIG. 3, the first printed wiring board 1
Connection terminal 3 of the second printed wiring board 4 through hole 6
Then, the land around the through hole 6 and the connection terminal 3 are connected by the solder 8 on the solder surface of the second printed wiring board 4.

As described above, according to this embodiment, the first printed wiring board 1 and the second printed wiring board 4 are connected by the connection terminals 3 and the through holes 6 without using a connector, thereby The circuit on the board can be electrically connected, and the material cost of the connector and the man-hours for mounting the connector can be reduced.
In addition, by connecting the first printed wiring board 1 and the second printed wiring board 4 with the large-sized fixed foot 2 and the square hole 5, both boards are firmly fixed and stress is applied to the printed wiring board. Accidents such as disconnection of the wiring pattern can be prevented. Therefore, the dimensions and intervals of the connection terminals 3, the through holes 6 and the wiring patterns connected to them can be reduced, and the number of connection terminals of the circuits on both printed wiring boards 1 and 4 can be increased. In addition, by connecting the ground pattern or the power supply pattern of the circuit on both the printed wiring boards 1 and 4 to the land around the large-sized fixed leg 2 and the square hole 5, the inter-board connection impedance of those patterns is obtained. It can be reduced, the noise resistance of the circuit can be improved, and the reliability can be improved.

[0014]

As is apparent from the above description of the embodiment, the present invention has the connection terminals and the fixing feet arranged on the first printed wiring board and the connection terminals fitted on the second printed wiring board. The through-holes connected to the wiring pattern and the square holes that fit into the fixed legs are arranged to reduce the cost by connecting the printed wiring boards to each other without using a connector. It is possible to realize an excellent printed wiring board connecting device capable of preventing disconnection of the printed wiring board and increasing the number of terminals of the circuit of the printed wiring board.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of essential parts showing the concept of a printed wiring board connecting device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA ′ in the connection state of FIG.

3 is a sectional view taken along the line BB ′ in the connection state of FIG.

FIG. 4 is an exploded perspective view of essential parts showing the concept of a conventional printed wiring board connecting device.

[Explanation of symbols]

 1 First printed wiring board 2 Fixed foot 3 Connection terminal 4 Second printed wiring board 5 Square hole 6 Through hole

Claims (1)

[Claims] 1. A first printed wiring board having fixed feet and connection terminals, and a second printed wiring board having through holes and square holes connected to a wiring pattern, wherein the connection terminals and through holes are provided. , A printed wiring board connecting device in which first and second printed wiring boards are connected by fitting square holes into fixed feet.