JPH0416387Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention relates to a connector for directly electrically connecting wiring boards mounted with high-frequency circuits to each other.

"Prior Art" Conventionally, as shown in FIGS. 7 and 8, connectors for directly electrically coupling wiring boards 1A and 1B have been used.

In the connector shown in FIG. 7, contact pieces 3A and 3B having spring properties are attached to conductors 2A and 2B forming microstrip lines or balanced lines formed on both sides of a wiring board 1A. The structure is such that conductors 2A and 4A and conductors 2B and 4B of wiring boards 1A and 1B are electrically connected to each other by bringing the free ends into pressure contact with conductors 4A and 4B formed on the mating wiring board 1B.

The connector shown in FIG.
put on. This contact piece 5 is lined with an elastic body 6 such as silicone rubber, and a tightening force is applied between the contact holder 7 and the board 8 with a screw or the like via this elastic body 6, and the contact piece 5 is lined with an elastic body 6 such as silicon rubber. 5 to conductor 2A and 4
This connector has a structure in which it is pressed into contact with A and maintains electrical contact.

``Problems to be Solved by the Invention'' The connector shown in FIG. 7 has a structure in which the contact pieces 3A, 3B contact the ends of the conductors 4A, 4B inwardly. Therefore, a circuit is formed in which no current flows in the conductors 4A', 4B' between the contact point P between the contact pieces 3A, 3B and the conductors 4A, 4B and the ends of the conductors 4A, 4B.
This part has the disadvantage of becoming a parasitic circuit and causing impedance mismatch. This effect is particularly noticeable when dealing with high-frequency signals such as microwaves, and is a cause of large disturbances in the signal waveform.

In the connector shown in FIG. 8, the contact pieces 5 are in contact with each other near the ends of the conductors 2A and 4A, so that impedance disturbance is less than in the previous example. However, since the contact area where the contact piece 5 contacts the conductors 2A and 4A varies greatly depending on the tightening force applied between the contact holder 7 and the board 8, it is difficult to always match the connection conditions to a constant condition. Furthermore, during practical use, the contact conditions may change and the transmission characteristics may change, resulting in poor stability.

The purpose of this invention is to provide a high frequency connector that has as little impedance mismatch as possible and can maintain a stable connection state.

``Means for solving the problem'' This invention consists of: A. A pair of wiring boards equipped with high-frequency wiring conductors to be connected to each other; B. It is fixed and electrically connected to one end, and the other end is placed in a position that matches the edge of the wiring board,
Further, at the other end thereof, there is a movable contact piece made of an elastic material which is deflected in a direction away from the board surface of the wiring board to apply a biasing force; A fixed contact piece that is electrically connected and whose other end protrudes from the edge of the wiring board and comes into contact with the movable contact piece; The deflected side of the movable contact piece and the protruding side of the fixed contact piece are overlapped with the fixed contact piece on the outside, and the fixed contact piece is pressed against the wiring board side against the biasing force of the movable contact piece. A high frequency connector is constructed by the holding means and the following.

"Function" According to the high frequency connector of this invention, the tip of the movable contact piece contacts the base of the fixed contact piece protruding from the mating wiring board, and the tip of the fixed contact piece contacts the base end side of the movable contact piece. .

As a result, there will be no portion where current does not flow between the wiring conductor of one wiring board and the wiring conductor of the other wiring board, and no impedance mismatch will occur at the connector portion. Therefore, the high frequency signal can be transmitted from one wiring board to the other wiring board without causing any disturbance in its waveform.

"Embodiment" FIG. 1 shows an embodiment of this invention. 1 in the diagram
A and 1B are wiring boards, 2A and 4A are these wiring boards 1
The wiring conductors deposited on A and 1B are shown. This example shows a case where wiring conductors 2A and 4A are formed only on one side of wiring boards 1A and 1B.

In this invention, a movable contact piece 11 is attached to the wiring conductor 4A of one wiring board, and a fixed contact piece 12 is attached to the wiring conductor 2A of the other wiring board.

The movable contact piece 11 is made of a conductive spring material, and its spring property biases its tip in a direction away from the board surface of the wiring board 1B, and the other end is attached to the wiring conductor 4A. The free end of the movable contact piece 11 is aligned with the position of the end surface of the wiring board 1B.

On the other hand, a fixed contact piece 12 is attached to the wiring conductor 2A of the other wiring board 1A. The fixed contact piece 12 is made of a hard conductive material that does not bend, and is made to protrude from the end surface of the wiring board 1A.

In the example shown in FIG. 1, wiring conductors 2A and 4A are formed on one side of wiring boards 1A and 1B, respectively.
If the signal transmission path is a microstripline or balanced signal path, wiring conductors 2 are installed on both sides of wiring boards 1A and 1B as shown in FIG.
A, 2B and 4A, 4B are adhered and formed, and movable contact pieces 11A,
11B and fixed contact pieces 12A, 12B may be attached. In this way, wiring boards 1A and 1B
Movable contact pieces 11A, 11B and fixed contact piece 12 are provided on both sides of the
A, 12B, when the movable contact piece 11A is attached to one side of the wiring board 1B, the movable contact piece 1
1B is attached to the other surface of the wiring board 1A. At the same time, the fixed contact piece 12A is attached to one side of the wiring board 1A, and the fixed contact piece 12B is attached to the other side of the other wiring board 1B.

In addition, when the transmission path has a microstripline structure, the wiring conductors 2B and 4 arranged on the back side of the wiring conductors 2A and 4A forming the signal path
B becomes a ground conductor. This ground conductor is wiring board 1
A, 1B are coated on the entire back surface, or are coated as a conductive layer with a width wider than the width of the wiring conductors 2A and 4A constituting the signal path, and a movable contact piece 11B and a fixed contact piece 12B are made to have a width equal to this width. Select the width.

In addition, if the transmission path is a balanced signal path, as shown in Figure 4, wiring conductors 2A,
4A, 2B, and 4B are formed of wiring conductors having the same width.

Alternatively, the tips of the movable contact pieces 11A, 11B may be formed into a comb-teeth shape as shown in FIG. 5, so that there can be multiple contact points.

Figure 6 shows movable contact pieces 11A, 11B and fixed contact piece 1.
A holding means for maintaining 2A and 12B in pressure contact with each other is shown. 13 indicates a holding means. The holding means 13 includes a pair of holding pieces 13A, 13B made of an insulator and this pair of holding pieces 13A, 13B.
It can be constructed by a bolt 13C and a nut 13D passing through the gap and applying a tightening force therebetween.

According to the configuration described above, the movable contact pieces 11A, 11B
The tips of the wiring boards 1A and 1B have spring properties.
Since the wiring boards 1A and 1B are joined together, the movable contact pieces 11A, 11B and the fixed contact pieces 12A, 12 are held together by the holding means 13.
By pressing against B, the movable contact pieces 11A, 1
The tip of 1B contacts the bases of fixed contact pieces 12A, 12B, that is, the bases of the portions protruding from the end surfaces of wiring boards 1A, 1B. Further, the tips of the fixed contact pieces 12A, 12B contact the other end sides of the movable contact pieces 11A, 11B.

Therefore, according to the configuration of this invention, there is no portion in either the movable contact piece or the fixed contact piece where current does not flow. Therefore, impedance mismatch does not occur at the portions where the wiring boards are connected to each other, and the high frequency signal can be transmitted without disturbing its waveform.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing one embodiment of this invention, Fig. 2 is a sectional view showing a modified embodiment of this invention, and Fig. 3 is a sectional view showing an embodiment of this invention.
5 to 5 are perspective views showing other modified embodiments of this invention, FIG. 6 is a perspective view showing an example of the holding means used in this invention, and FIGS. 7 and 8 explain this prior art. FIG. 1A, 1B...Wiring board, 2A, 2B, 4A, 4
B... Wiring conductor, 11A, 11B... Movable contact piece,
12A, 12B... Fixed contact piece, 13... Holding means.

Claims (1)

[Scope of Claim for Utility Model Registration] A: A pair of wiring boards equipped with high-frequency wiring conductors to be connected to each other; B: A pair of wiring boards provided on the edge of one wiring board, with one end fixed to one end of the wiring conductor, a movable contact piece made of an elastic material, the other end of which is connected to the edge of the wiring board, the other end of which is substantially opposite to the edge of the wiring board, and the other end of which is deflected away from the surface of the wiring board; a fixed contact side having one end fixed to and electrically connected to the wiring conductor and the other end protruding from the edge of the wiring board; The deflected side of the movable contact piece and the protruding side of the fixed contact piece are overlapped with the fixed contact piece on the outside, and the fixed contact piece is applied against the biasing force of the movable contact piece. A high frequency connector comprising: a holding means for press-contacting a contact piece to a wiring board side;