JPH0124326B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a so-called matrix circuit network.
The present invention provides a switching device for matrix circuits that is suitable for switching high-frequency power of medium power (about several kilowatts), has a simple structure, can be manufactured at low cost, and has excellent electrical performance.

The output lines (also called input lines) of multiple high-frequency signal sources are lined up in parallel, and multiple load lines are lined up at right angles to these lines, and a high-frequency switch is placed at their intersection to switch any signal source output to any desired signal source. So-called matrix networks for connection to load lines are widely used, for example in shortwave transmitting stations.

FIG. 2 shows a part of this matrix switching network, and the signal source output lines are connected to terminals a, b, c...
..., and the load line to the antenna etc. is connected to the terminal,,.... At each intersection of these lines there is a switch a, b, c...,
a, b, c... and a, b, c are arranged, and in the connected state of switch a, b, c in Fig. 2, the input line and the load line are connected to the load line. In the switch, the input line and load line are cut off, and each line is connected directly to the other. If the control system circuit is configured so that only one switch is always connected in the same signal source output line and load line, it is possible to connect the switch at any intersection. Therefore, multiple signal source outputs can be connected to any load line. The requirements for a switch used in such a matrix circuit are as follows.

1 High frequency loss between the terminals of the switch in the connected state shall be better than -40dB.

2 Leakage between disconnected lines shall be better than -60dB.

3. The allowable power for high frequency transmission shall satisfy the required value.

4. Remote control is possible.

5. Must operate reliably, have a long life, and be easy to work with.

To date, the group control coaxial switching device suitable for circuits with high frequency power of 10 kW or more is Utility Model Registration No. 1179724, and the coaxial switching device suitable for use with 10 kW or less is Utility Model Application No. 77468. There is a high frequency switching device for small power group control, which is registered as Utility Model Registration No. 1301433, for low power for receiving circuits.

The present invention has fundamentally renewed the concept of these methods, and has simplified the structure while maintaining high performance.
This is a completed KW high frequency circuit switching device, in which a fixed electrode and a contact electrode are placed on the left and right sides of the first surface of the electromagnetic shielding board, and a leaf spring fixed to the fixed electrode is brought into contact with the contact electrode. A counter contact electrode is provided on the electromagnetic shielding substrate with which the leaf spring comes into contact when the leaf spring is pushed away from the contact electrode with an insulator, and the opposite surface (second surface) of the electromagnetic shielding substrate is provided with the electrode. The electrodes are arranged in a shape similar to that of the above-mentioned electromagnetic shielding substrate by rotating them approximately 90 degrees and inverting them, and electrically connecting the opposing contact electrodes on both sides of the electromagnetic shielding substrate. An insulator for the first surface and an insulator for the second surface are provided on the shaft, and as the rotation shaft rotates, the leaf springs on both sides are pressed and bent at the same time and connected to the opposing contact electrodes, respectively. The gist is a switching device for matrix circuits, which is configured to connect between fixed electrodes, and connects an external circuit or an adjacent switching device of the same structure to the extension of each electrode, excluding the opposing contact electrodes on both sides. do.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a principle diagram of a switching electrode section according to the present invention. That is, it was decided to place respective switching parts on both sides of the electromagnetic shielding board 7 and to connect external circuits to the extension parts of the electrodes. The switching portions provided on the first and second surfaces of the electromagnetic shielding substrate 7 are rotated approximately 90 degrees relative to each other and have an inverted configuration, and the fixed electrodes 1,
1' and contact electrode 2, and contact electrode 1' and contact electrode 2' are almost in a straight line, and between them, one end is connected to fixed electrode 1,
They are connected by plate springs 4, 4', which are good conductors and are fixed to terminal 1'. In this state, the fixed electrodes 1 and 1' on both sides of the electromagnetic shielding substrate are in a disconnected state.

The leaf springs 4, 4' are, for example, cam-shaped insulators 5,
5', the fixed electrodes 1, 1' and the opposing contact electrodes 3, 3' are connected, and the contact electrodes 2, 2' and the fixed electrodes 1, 1' are disconnected. At this time, since the opposing contact electrodes 3 and 3' on both sides are connected by the connecting wire 8, both fixed electrodes 1 and 1' are connected.

The electromagnetic shielding board 7 may be formed by, for example, covering the surface of an insulating plate with a good conductor. At this time, each electrode is implanted insulated from this.

The insulators 5, 5' are fixed to the same rotating shaft 6 passing through the electromagnetic shielding board 7 on each side of the electromagnetic shielding board, and the double-sided switching portions thereof are switched at the same time. Therefore, the rotary drive mechanism, fixed position click, changeover information switch, etc. are mounted on the extension of this rotary shaft 1. The switch for notifying the switching information may be operated at a fixed position in the connected and disconnected state. Information from this switch can be used to restrict other switches to being disconnected first so that only one switch can be connected on the same input line and load line.

FIG. 3 is an example embodying the present invention. An electromagnetic shielding board 7 with switching parts formed on both sides as shown in FIG. 1 is attached to a fixing plate 10 via a mounting rod 9 which is supported through the electromagnetic shielding board. Round holes 13 are bored in this fixed plate at positions corresponding to each electrode part, and fixed electrodes 1, 1' and contact electrodes 2,
The tip of 2' comes out from the round hole 13.

4 is a cross-sectional view taken along line A-A' in FIG. 3, showing the structure of one surface of the electromagnetic shielding board 7, and FIG. 5 is a cross-sectional view taken along line B-B' in FIG. , which shows the structure of the other side of the electromagnetic shielding board. A mounting plate 14 is attached to the mounting rod 9, and a rotary shaft drive mechanism and other accessories are attached to this mounting plate.

The required number of single switching devices are attached to fixed plates 10 with screws 11 adjacently as shown in FIG. 6, and fixed electrodes 1, contact electrodes 2, and 1' and 2' are connected by the connecting line 12 at the shortest distance.

It is necessary for the switching device and the connecting line portion to minimize the reflection of the high-frequency signals used, and this is achieved by appropriately adjusting the distance from the ground plane and the cross-sectional size and shape of the conductor portion. Test results showed that a VSWR of 1.03 or less was easily achieved at frequencies below 50MHz.

In FIGS. 3 to 5 described above, the opposing contact electrodes 3 and 3' on both sides of the electromagnetic shielding board are provided separately, and they are connected by a connecting wire 8, but one electrode rod 3 is connected to the board 7. The structure shown in FIGS. 7 to 9, which protrudes from both sides, is also possible. In this case, the connecting wire 8 becomes unnecessary, but since the bending angle in the connected state of the leaf springs 4 and 4' becomes wider than in the previous example. , the upper limit of the frequency used is restricted.

In the present invention, as mentioned above, by using the new idea of providing switching sections on both sides of the electromagnetic shielding board 7, a switching device for matrix circuits that is simple in structure, easy to work, inexpensive, and has high performance has been completed. It is something.

[Brief explanation of drawings]

Fig. 1 is a principle diagram of the present invention, Fig. 2 is a matrix switching configuration diagram, Fig. 3 is a front view showing an embodiment of the present invention, and Figs. 4 and 5 are taken along the line A-A' in Fig. 3. and a partial sectional view taken along line B-B', FIG. 6 is an explanatory diagram of the installation of the switch group, FIG. 7 is a front view showing another embodiment of the present invention, and FIGS. Diagram A
FIG. 3 is a partial cross-sectional view taken along lines -A' and B-B'. 1, 1' are fixed electrodes, 2, 2' are contact electrodes, 3,
3' is a counter contact electrode, 4 and 4' are leaf springs, and 5 and 5'
is an insulator, 6 is a fixed shaft, 7 is an electromagnetic shielding board, 8,
12 is a connecting wire, 9 is a mounting rod, 10 is a fixing plate, 11
is the mounting screw, and 13 is the mounting plate.

Claims (1)

[Scope of Claims] 1. A fixed electrode 1 and a contact electrode 2 are placed on the left and right sides of approximately the center of the first surface of the electromagnetic shielding substrate 7, and a leaf spring 4 fixed to the fixed electrode 1 is brought into contact with the contact electrode 2, A counter contact electrode 3 is provided on the electromagnetic shielding substrate 7 with which the leaf spring comes into contact when the leaf spring 4 is pushed away from the contact electrode with the insulator 5. ) are the above electrodes.
The electrodes 1', 2', and 3' are arranged in a shape that is rotated 90 degrees and inverted, and the opposing contact electrodes 3 and 3' on both sides of the electromagnetic shielding board are electrically connected. An insulator 5 for the first surface and an insulator 5' for the second surface are provided on an insulator rotating shaft 6 that penetrates the electromagnetic shielding board 7, and by rotation of this rotating shaft 6, the leaf springs 4, 4' are pressed and bent at the same time to connect them to the opposing contact electrodes 3, 3', respectively, and to connect the fixed electrodes 1, 1' on both sides of the electromagnetic shielding substrate, and
A switching device for a matrix circuit, in which an external circuit or an adjacent switching device of the same structure is connected to an extension of each electrode, except for opposing contact electrodes 3 and 3' on both sides. 2. The switching for matrix circuits according to claim 1, wherein the opposing contact electrodes on both sides of the electromagnetic shielding board are combined into one piece, and this opposing contact electrode is passed through the electromagnetic shielding board to be used on both sides of the electromagnetic shielding board. vessel.