JP2602952Y2 - Connection structure between circuit boards - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure between circuit boards in which electric circuit boards are connected to each other.

[0002]

2. Description of the Related Art Conventionally, a connection structure for connecting one circuit board to another circuit board has been required to be able to make a connection with a high contact pressure with a low operating force. As such a connection structure, for example, as shown in FIG. 7, a conductive projection (bump) 4 is formed on a pattern 2 of one circuit board 1 by a method such as plating or etching by secondary processing. In some cases, the protrusions 4 are connected to the connection terminals in the pattern 2 of the other circuit board 1 and pressed to connect the two circuit boards.

In the case of this connection structure, a high contact pressure can be obtained because the pressing force concentrates on the projection 4. As a result, the protruding portion 4 breaks the oxide film on the surface of the connection terminal, and provides good electrical connection between the circuit boards.

[0004]

In the case of the above-described connection structure between circuit boards, the connection is made by making the protruding portion of one circuit board coincide with the connection terminal of the other circuit board. There is a drawback that an allowable range of the line width is allowed, and high accuracy is required for positioning in the line width direction. Further, after forming the pattern on one of the circuit boards, the protruding portion must be provided on the pattern by secondary processing, and there is a problem that the cost is increased due to an increase in the number of manufacturing steps.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem. The technical problem of the present invention is to provide a connection between circuit boards which has an allowable positioning range for connection and can be easily manufactured. It is to provide a structure.

[0006]

According to the present invention, a first circuit board provided with a first connection terminal and a second circuit board provided with a second connection terminal are connected to each other. In the connection structure between circuit boards in which the first connection terminal and the second connection terminal are crossed and connected to each other, the first connection terminal is formed on a pattern on the first circuit board. The first conductor line is formed, the second connection terminal is a second conductor line formed on a pattern on the second circuit board, and further the first conductor line and the second conductor The lines intersect each other and a connection structure between the circuit boards that are pressed into contact is obtained.

On the other hand, according to the present invention, the first circuit board provided with the first connection terminal and the second circuit board provided with the second connection terminal are connected to each other, In a connection structure between circuit boards in which the first connection terminal and the second connection terminal are crossed and connected to each other,
The connection terminal is a first conductor line coupled to the end of the pattern on the first circuit board, and the second connection terminal is a second conductor line coupled to the end of the pattern on the second circuit board. In addition, the first conductor line and the second conductor line intersect each other, and a connection structure between the circuit boards that are pressed and contacted is obtained.

According to the present invention, on the other hand, the first circuit board provided with the first connection terminal and the second circuit board provided with the second connection terminal are connected to each other, In a connection structure between circuit boards in which the first connection terminal and the second connection terminal are crossed and connected to each other,
Is a first conductor line formed on the pattern on the first circuit board, and the second connection terminal is a second conductor connected to the end of the pattern on the second circuit board. And the first conductor line and the second conductor line intersect each other, and a connection structure between the circuit boards that are pressed and contacted is obtained.

In any one of these connection structures between circuit boards, the pattern extends in a predetermined direction, and at least one of the first conductor line and the second conductor line is oblique to the predetermined direction. It is preferred that it extends.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The connection structure between circuit boards according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing an essential configuration of a connection structure between circuit boards according to an embodiment of the present invention. In this connection structure, a plurality of conductive patterns 2 forming an electric circuit are provided on a first circuit board 1, and a protective layer 5 is provided thereon. These patterns 2 are separated from each other, and each extends in a predetermined direction parallel to the longitudinal direction of the circuit board 1. One end of each pattern 2 in a predetermined direction is located near the end face of the circuit board 1. In the vicinity of the other end of each pattern 2, a fine first conductor wire 31 as a first connection terminal is formed obliquely to a predetermined direction and across the pattern 2 as shown in the drawing. I have. Here, the conductor wires 31 are all formed so as to be aligned in the same direction.

Similarly, a plurality of patterns 2 'are provided on a second circuit board 1' connected to the first circuit board 1, and a protective layer 5 'is provided thereon. In the vicinity of the other ends of these patterns 2 ′, fine second conductor lines 31 as second connection terminals intersecting with first conductor lines 31 are provided.
′ Is oblique to the predetermined direction, and the pattern 2 ′
Is formed across.

Next, the first circuit board 1 having such a configuration will be described.
2 and FIG. 3 for connection of the second circuit board 1 ′.
This will be described with reference to FIG. However, for convenience of the drawings, the circuit board is omitted, and connection of only the pattern will be described.

First, referring to FIG. 2, a first conductor line 31 is provided on a pattern 2 of a first circuit board 1, and a first conductor line 31 is provided on a pattern 2 'of a second circuit board 1'. Conductor wire 3
1 'is provided. Here, when the end faces of each circuit board are abutted so that the patterns 2 and 2 ′ face each other,
Conductor wire 31 of pattern 2 of circuit board 1 located on the lower side
And the conductor line 31 'of the pattern 2' of the circuit board 1 'located on the upper side intersects and contacts. Then, when one circuit board is pressed toward the other circuit board in order to make the two circuit boards 1 and 1 'relatively close to each other, the conductor lines 31 and 31' on both the patterns 2 and 2 'as shown in FIG. Are pressed against each other to be in a current-carrying contact state. In this state, patterns 2 and 2
Even if there is some misalignment in the width direction of ′ or in the extending direction of ′, current-carrying contact is always made as long as the conductor wires 31 and 31 ′ face each other. Therefore, the range in which the positional deviation can be tolerated becomes large.

The permissible range of the energizing contact will be specifically described with reference to FIG. First, the displacement between the patterns 2 and 2 ′ in the pattern width direction is determined by the point at which the tip 31a of the conductor wire 31 on the pattern end face side and the end 31b ′ of the conductor wire 31 ′ located on the side face of the pattern come into contact with the conductor Of the wire 31 and the conductor wire 31 'on the pattern end face side 31
The distance to the point at which a ′ contacts, that is, a range of about twice the distance L1 in the width direction of the pattern 2 is allowed.

Next, a description will be given of the allowable range of positional deviation in the extending direction of the pattern 2. In this case, each end 31 of the conductor wire 31, 31 'in both patterns 2, 2'
a, 31a 'come into contact with each other from the end 31b,
31b 'to the point where they contact each other, that is, the conductor wire 3
Distance L in the direction along the extending direction of the first pattern 2
A distance approximately twice as large as 2 is the allowable range of the displacement.

Incidentally, since the energizing contact here is usually performed under the condition that a certain degree of positioning accuracy is controlled, the case where an extreme displacement such as the maximum allowable range described above occurs can be almost ignored. In addition, the actual displacement does not exist only in the extending direction and the width direction of the patterns 2 and 2 ', but also occurs in the direction in which these are combined. Is the allowable area, so that the allowable range of the displacement can be expanded.

Next, another embodiment of the present invention will be described with reference to FIG. The connection structure between the circuit boards is
As compared to the previous embodiment, instead of forming the conductor lines 31 and 31 'on the patterns 2 and 2', respectively, the conductor lines 32 and 32 'are connected to the ends of the patterns 2 and 2' as shown in the figure. Provided.

In the case of this embodiment, the conductor lines 32, 32 'extending from the patterns 2, 2' of the respective circuit boards 1, 1 'are opposed to each other so as to intersect as shown in FIG. As described above, the conductor wires 32 and 32 'are pressed to make electrical contact. Also in this case, as in the previous embodiment, it is possible to enlarge the allowable range of the positional deviation and to perform a reliable connection.

In each of the above-described embodiments, the case where the conductors 31, 31 'and the conductors 32, 32' are arranged in the same direction has been described. Since it is only necessary that the two cross each other at the time of performing the connection of ′, these directions can be changed so as to be alternately opposite.

Further, in the connection structure between circuit boards according to the present invention, a configuration in which the above-described embodiments are combined, that is, a first conductor line is formed on a pattern of one circuit board and another circuit is formed. It is also possible to adopt a configuration in which a second conductor wire is provided at the end of the pattern of the substrate by being joined thereto, and the first and second conductor wires are pressed and contacted so as to cross each other.

[0022]

As described above, according to the connection structure between circuit boards of the present invention, fine conductor wires (connection terminals) provided between the circuit boards are pressed and contacted in a crossed state. As a result, the connection between the circuit boards can be achieved, so that the connection with a high contact pressure can be reliably performed with a low operating force after expanding the allowable range of the positional deviation. Also, since the conductor wire is provided at the end of the pattern, in this case, the conductor wire can be formed simultaneously in the process of forming the pattern on the circuit board, so that the number of steps in manufacturing can be reduced and cost reduction can be realized. There are advantages.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main configuration of a connection structure between circuit boards according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a positional relationship between circuit boards before connection in the connection structure shown in FIG. 1;

FIG. 3 is a perspective view showing a positional relationship between circuit boards after connection in the connection structure shown in FIG. 1;

FIG. 4 is a perspective view showing a main configuration of a connection structure between circuit boards according to another embodiment of the present invention.

5 is a perspective view showing a positional relationship between circuit boards before connection in the connection structure shown in FIG. 4;

6 is a perspective view showing a positional relationship between circuit boards after connection in the connection structure shown in FIG. 4;

FIG. 7 is a side view showing a main configuration of a conventional connection structure between circuit boards.

[Description of Signs] 1,1 ′ Circuit Board 2,2 ′ Pattern 4 Projection 5,5 ′ Protective Layer 31,31 ′, 32,32 ′ Conductive Wire

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01R 9 / 09,13 / 04

Claims (4)

(57) [Scope of request for utility model registration] 1. A first circuit board provided with a first connection terminal and a second circuit board provided with a second connection terminal are connected to each other, and the first connection terminal is provided. And a connection structure between circuit boards in which the second connection terminals are crossed and connected to each other, wherein the first connection terminals are first conductor lines formed on a pattern on the first circuit board. Wherein the second connection terminal is a second conductor line formed on a pattern on the second circuit board.
The connection structure between circuit boards, wherein the first conductor line and the second conductor line cross each other and are pressed against each other. 2. A first circuit board provided with a first connection terminal and a second circuit board provided with a second connection terminal are connected to each other, and the first connection terminal is provided. And in a connection structure between circuit boards in which the second connection terminals are crossed and connected to each other, the first connection terminal is a first conductor wire coupled to a tip of a pattern on the first circuit board Wherein the second connection terminal is a second conductor line coupled to a tip of a pattern on the second circuit board, and the first conductor line and the second conductor line intersect each other. And a connection structure between the circuit boards, wherein the connection is made by pressing. 3. A first circuit board provided with a first connection terminal and a second circuit board provided with a second connection terminal are connected to each other, and the first connection terminal is provided. And a connection structure between circuit boards in which the second connection terminals are crossed and connected to each other, wherein the first connection terminals are formed of a first conductor formed on a pattern on the first circuit board. The second connection terminal is a second conductor line coupled to a pattern end on the second circuit board;
The connection structure between circuit boards, wherein the first conductor line and the second conductor line cross each other and are pressed against each other. 4. The connection structure between circuit boards according to claim 1, wherein the pattern extends in a predetermined direction, and the first conductor line and the second conductor line. A connection structure between circuit boards, wherein at least one of them extends obliquely with respect to the predetermined direction.