JPH0847012A - Matrix switch - Google Patents

Abstract

PURPOSE:To provide a matrix switch in which deterioration in a high frequency signal due to undesired wiring is improved. CONSTITUTION:The matrix switch consists of wires wired vertically and laterally, difference point switches each short-circuiting vertical and lateral wires at a difference point, and inter-difference point switches each interrupting vertical and lateral wires between difference points, and in the initial state, all difference point switches are open and all inter-difference point switches are closed, and vertical wires and lateral wires are respectively connected in columns and lines but vertical and lateral wires are disconnected. In the case of connecting a lateral wire 2 and a vertical wire 2, a difference point switch 2-2 is closed and inter-difference point switches R2-2, C2-2 are open to disconnect electrically the lateral wires to the right of the difference point 2-2 and the vertical wires at the lower side, then the deterioration in the high frequency signal due to undesired wiring is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a matrix switch for improving high frequency characteristics.

[0002]

2. Description of the Related Art A matrix switch is a switch that arbitrarily connects a large number of horizontal wirings and a large number of vertical wirings. A conventional matrix switch is shown in FIG. Place the switch at the difference between the vertical and horizontal wiring,
The wirings to be connected are short-circuited. In such a configuration, for example, when the horizontal wiring 2 and the vertical wiring 2 are connected like a thick line, the dotted line portion that is not necessary for the original connection is also electrically connected. Such unnecessary wiring does not pose a problem for low-frequency signals, but when high-frequency signals are passed, there is a problem in that signal quality deteriorates due to reflection from the wiring end and mixing of noise into the wiring.

The present invention is to improve the deterioration of a high frequency signal due to the above-mentioned unnecessary wiring, which is a drawback of the conventional matrix switch, and achieves the following objects. Electrically disconnect unnecessary wiring to reduce reflection from the end and mixing of noise. The disconnection of unnecessary wiring and the short-circuiting of vertical and horizontal wirings are performed only by the switches arranged at the difference points (hereinafter referred to as difference point switches), and the structure of the matrix switch is simplified. The difference point switch structure is simplified.

[0004]

A first structure of the present invention for achieving the above object is a matrix switch for electrically coupling a large number of vertically and horizontally arranged wirings, and a switch for short-circuiting the vertical and horizontal wirings at a difference point. And a switch for disconnecting vertical and horizontal wiring between the difference points.

According to a second structure of the present invention, in a matrix switch for electrically coupling a large number of vertically and horizontally arranged wirings, the connection state of the first vertical wiring and the second vertical wiring which meet at a difference point. And a switch for switching the connection state of the first horizontal wiring and the second horizontal wiring to the connection state of the first vertical wiring and the first horizontal wiring.

According to a third structure of the present invention, in the second structure, the switch at each difference point is composed of first and second changeover switches, the first switch has three coupling terminals, and the first switch has The second switch has a function of selectively connecting the terminals to the second and third terminals, the second switch has a function of connecting and disconnecting the first terminal to the second terminal, and The first terminal of the one switch is connected to the first lateral wiring which meets the difference point, and the second terminal of the first switch is connected to the second side wire which meets the difference point.
Connected to the horizontal wiring of the first switch, the third terminal of the first switch connected to the first vertical wiring meeting the difference point, the first terminal of the second switch connected to the second vertical wiring meeting the difference point The third terminal of the first switch is connected to the second terminal of the second switch, and the first terminal of the second switch is connected to the first terminal of the second switch when the first terminal and the second terminal of the first switch are connected. When the first terminal and the second terminal of the first switch are connected and the first terminal and the third terminal of the first switch are connected, the first terminal and the second terminal of the second switch are disconnected. Characterize.

According to a fourth structure of the present invention, in the second structure, the switch at each difference point is composed of two changeover switches having the same first and second structures, and each switch has three coupling terminals, It has a function of selectively coupling the first terminal to the second and third terminals, and the first terminal of the first switch is connected to the first horizontal wiring that meets the difference point, The second terminal connects to the second horizontal wire that meets the difference,
The third terminal of the first switch is connected to the first vertical wiring meeting the difference point, and the first terminal of the second switch is connected to the second vertical wiring meeting the difference point, the second switch The second terminal of the first switch is connected to the third terminal of the first switch, and when the first terminal of the first switch is coupled to the second terminal, the first terminal and the second terminal of the second switch Are coupled, and when the first terminal and the third terminal of the first switch are coupled, the first terminal and the third terminal of the second switch are coupled.

A fifth structure of the present invention is characterized in that, in the third or fourth structure, the contacts of the first switch and the second switch are driven by a common actuator.

That is, the matrix switch according to the present invention has the difference point switch that short-circuits the vertical and horizontal wirings at the difference point and the interpoint difference switch that cuts the vertical and horizontal wirings between the difference points. It was decided to improve signal deterioration.

[0010]

In the matrix switch according to the first structure,
It is possible to short-circuit the vertical and horizontal wirings at the difference point and electrically disconnect the unnecessary wiring from the difference point.
Therefore, it is possible to reduce reflection from the unnecessary wiring portion and mixing of noise.

In the matrix switch according to the second configuration, only the difference point switch is used to switch the connection state of the vertical and horizontal wirings at the difference point from vertical to vertical, horizontal to horizontal, and to vertical to horizontal pairs. As a result, it is possible to simultaneously realize a short circuit between the vertical and horizontal wirings and disconnection of the unnecessary wiring from the point of difference.

In the matrix switch according to the third structure, the difference point switch is composed of a simple combination of two switches, and both switches operate in synchronization. At one operating point of both switches, vertical and vertical, horizontal and horizontal wirings are connected, and at other operating points, vertical and horizontal wirings are short-circuited, and unnecessary wirings are disconnected. As a result, the same effect as the second structure can be obtained with a simple structure.

In the matrix switch according to the fourth structure, the difference point switch is composed of two switches having a simple structure, as in the third structure. Further, in this configuration, both switches have the same structure, and by appropriately connecting these terminals, the same effect as the third configuration can be obtained. Since the switches used are the same,
The parts supply and handling operations in the matrix switch assembly are simplified.

In the matrix switch according to the fifth structure, paying attention to the fact that the two switches in the third and fourth structures operate in synchronization, the two switches are driven by one actuator. There is. As a result, the number of parts forming the switch can be reduced.

[0015]

EXAMPLES Preferred examples according to the present invention will be described below.

[Embodiment 1] A first embodiment of the present invention is shown in FIG.
Shown in The matrix switch is composed of vertical and horizontal wirings, a difference point switch that short-circuits the vertical and horizontal wirings at the difference points, and a difference point switch that cuts the vertical and horizontal wirings between the difference points. In the initial state, all the difference point switches are open and all the difference point switches are closed. As a result, the vertical and horizontal wirings are connected for each row and column, but the vertical and horizontal wirings are all disconnected.

Next, for example, when connecting the horizontal wiring 2 and the vertical wiring 2, the difference point switch 2-2 is closed and the difference point switches R2-2 and C2-2 are opened (see FIG. 1). In this way, the horizontal wiring on the right side of the difference point 2-2 and the vertical wiring on the lower side in FIG. 1 can be electrically disconnected.

[Embodiment 2] A second embodiment of the present invention is shown in FIG.
Shown in The matrix switch is composed of vertical and horizontal wiring and a difference point switch. Further, the difference point switch has the circuit structure of FIG. 3, and the internal switch 1 and the internal switch 2
It consists of

In the internal switch 1, the terminal 1-1 is connected to the terminal 1-
2 and terminals 1-3 are selectively connected, and the internal switch 2 is
The terminal 2-1 and the terminal 2-2 are connected and disconnected. Also terminal 1
-1 and 1-2 are connected to horizontal wiring, terminals 2-1 and 1-3 are connected to vertical wiring, and terminal 2-2 is connected to terminal 1-3.

The internal switch 1 has a mechanical structure as shown in FIG. Here, the terminal 1-1 is connected to the leaf spring 11 having conductivity and soft magnetism, and the leaf spring 11 is in contact with the electrode 1-2 to which the terminal 1-2 is connected in the initial state. The leaf spring 11 is made of, for example, soft iron. When the electromagnet 13 in the case 12 is energized, the leaf spring 11 is magnetically attracted, and the leaf spring 11 comes into contact with the electrode 1-3. As a result, the terminal 1-1 is switched to the terminal 1-
2, 1-3 can be selectively connected. Although the leaf spring has been described as an example in the present embodiment, the present invention is not limited to this.

The internal switch 2 has a mechanical structure as shown in FIG. The internal switch 2 has a structure similar to that of the internal switch 1, except that the terminals 1-3 and the electrodes 1 are
-3 does not exist, and the terminals 2-1 and 2-2 are connected and disconnected by energizing the electromagnet 13.

Next, the operation of this embodiment will be described. In the initial state, the electromagnets of all the difference point switches are not energized, and as a result, the terminal 1-1 is connected to the terminal 1-2 and the terminal 2-1 is connected to the terminal 2-2. At this time, the connection state of the entire matrix switch is as shown in FIG. 6, and the vertical and horizontal wirings are connected to each row and column, but all the vertical and horizontal wirings are disconnected.

Next, consider a case where the horizontal wiring 1 and the vertical wiring 3 are connected, the horizontal wiring 2 and the vertical wiring 1 are connected, and the horizontal wiring 3 and the horizontal wiring 2 are connected. At this time, the difference point switches 1-3 and 2-
Only the electromagnets of the switches 1 and 3-2 are energized. Then
At these points of difference, the upper vertical lines and the left horizontal lines are short-circuited, and the lower vertical lines and the right horizontal lines are disconnected. Then, the circuit state of the entire matrix switch becomes as shown in FIG. As a result, the desired connection is completed and unnecessary lines are disconnected.

[Embodiment 3] Next, a third embodiment of the present invention will be described. In this embodiment, the circuit structure of the difference point switch is as shown in FIG. The two internal switches have the same structure, and each internal switch has the same mechanical structure as the internal switch 1 in the second embodiment. However, in this embodiment, the terminals 2-3 of the internal switch 2 are not connected. As a result, the same function as that of the second embodiment can be obtained as the electric circuit.

[Fourth Embodiment] Next, a fourth embodiment of the present invention will be described. In this embodiment, the circuit structure of the difference point switch is the same as that of the third embodiment, but the mechanical structure is as shown in FIG. The terminals 1-1 and 2-1 are connected to conductive leaf springs 20-1 and 20-2, and both leaf springs are connected by a non-conductive connecting body 21 near the center. An iron piece 22 is fixed to a lower portion of the connecting body 21, and an electromagnet 23 is fixed to a case 24 below the iron piece 22. In the initial state, the leaf springs 20-1 and 20-2 have terminals 1-
2, 2-2 are connected to the connected electrodes 1-2, 2-2. When the electromagnet 23 is energized, the iron piece 22 is attracted, and the leaf spring comes into contact with the electrodes 1-3 and 2-3. As a result, depending on whether or not the electromagnet 23 is energized, the terminals 1-1 and 2-1 are connected to the terminals 1-2, 1-3, 2-1 and 2-
3 can be selectively connected. As a result, vertical and horizontal wirings can be connected and disconnected as in the second and third embodiments. This is because only one electromagnet is used for one difference point switch in this embodiment. The number of matrix switch parts can be reduced.

In the above embodiments, the difference point switch is a switch for switching the connection between terminals depending on the presence / absence of energization, but this switches the connection by a current pulse.
A known self-holding switch may be used. Further, although the case where the electromagnet is used as the actuator is shown in FIGS. 4, 5 and 9, the present invention is not limited to this, and another actuator such as a pneumatic piston may be used as the piezo element.

[0027]

As described above in connection with the embodiments, in the matrix switch according to the present invention, since the vertical and horizontal wirings are connected and unnecessary wirings are cut at the same time, reflection and noise from the wiring end portion are mixed. Can be reduced, and the connection between the wirings can be performed without deteriorating the quality of the high frequency signal.

That is, in the matrix switch according to the first configuration, the vertical and horizontal wirings are short-circuited at the difference point, and the unnecessary wiring before the difference point can be electrically disconnected. Mixing can be reduced.

In the matrix switch according to the second structure, since the connection state of the vertical and horizontal wirings at the difference point is switched from vertical to vertical, horizontal to horizontal, and vertical to horizontal pair by using only the differential point switch, the vertical and horizontal pairs are connected. Short-circuiting of wiring and disconnection of unnecessary wiring from the point of difference can be realized at the same time, and the structure of the matrix switch can be simplified.

In the matrix switch according to the third structure, the difference switch is composed of a simple combination of two switches so that both switches operate in synchronization, and at one operating point of both switches. Since the vertical and vertical lines and the horizontal and horizontal lines are connected and the vertical and horizontal lines are short-circuited at other operating points and the unnecessary lines are disconnected, the same effect as the second configuration can be obtained with a simple structure. .

In the matrix switch according to the fourth structure, the difference point switch has a simple structure as in the third structure.
Since both switches have the same structure and these terminals are properly connected, the same effect as the third structure can be obtained and the switches used are the same. The supply of components and the handling operation in the assembly of the matrix switch are simplified.

In the matrix switch according to the fifth structure, the two switches in the third and fourth structures operate in synchronization with each other, and the two switches are driven by one actuator. The number can be reduced.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of a difference point switch according to a first embodiment of the present invention.

FIG. 2 is a circuit configuration diagram of a difference point switch according to a second embodiment of the present invention. .

FIG. 3 is a circuit configuration diagram of a difference point switch according to a second embodiment.

FIG. 4 is a mechanical structure diagram of an internal switch according to a second embodiment.

FIG. 5 is a mechanical structure diagram of an internal switch in the second embodiment.

FIG. 6 is a connection state diagram of circuits in the second embodiment.

FIG. 7 is a connection state diagram of circuits in the second embodiment.

FIG. 8 is a circuit structure diagram of a difference point switch according to a third embodiment.

FIG. 9 is a diagram showing a mechanical structure of a difference point switch according to a fourth embodiment.

FIG. 10 is a schematic view of a conventional matrix switch.

[Explanation of symbols]

 11, 20-1, 20-2 leaf spring 12,24 case 13,23 electromagnet 21 connected body

Claims (5)

[Claims] 1. A matrix switch for electrically coupling a large number of vertically and horizontally arranged wirings, which comprises a switch for short-circuiting the vertical and horizontal wirings at a difference point and a switch for cutting the vertical and horizontal wirings between the difference points. Matrix switch characterized by. 2. A matrix switch for electrically coupling a plurality of vertically and horizontally arranged wirings, wherein a connection state of a first vertical wiring and a second vertical wiring which meet at a difference point, and a first horizontal wiring A matrix switch having a switch for switching a connection state of the wiring and the second horizontal wiring to a connection state of the first vertical wiring and the first horizontal wiring. 3. The switch at each difference point is composed of first and second changeover switches, the first switch has three coupling terminals, and the first terminal is selectively connected to the second and third terminals. The second switch has two terminals and the first terminal has a second terminal.
Has a function of connecting and disconnecting with the terminal of the first switch, the first terminal of the first switch is connected to the first horizontal wiring which meets the difference point, and the second terminal of the first switch is connected to the second point which meets the difference point. Connected to the horizontal wiring of the first switch, the third terminal of the first switch connected to the first vertical wiring meeting the difference point, the first terminal of the second switch connected to the second vertical wiring meeting the difference point The third terminal of the first switch is connected to the second terminal of the second switch, and the first terminal of the second switch is connected to the first terminal of the second switch when the first terminal and the second terminal of the first switch are connected. The first terminal and the second terminal of the second switch are disconnected when the first terminal and the third terminal of the first switch are connected, and the first terminal and the second terminal of the second switch are disconnected. The matrix switch according to claim 2, wherein 4. The switch at each difference is composed of two changeover switches having the same structure as the first and second, each switch has three coupling terminals, and the first terminal is the second and third terminals. It has a function of selectively coupling, the first terminal of the first switch is connected to the first horizontal wiring meeting the difference point, and the second terminal of the first switch is connected to the second horizontal wire meeting the difference point. , The third terminal of the first switch is connected to the first vertical wiring meeting the difference point, and the first terminal of the second switch is connected to the second vertical wiring meeting the difference point. , The second terminal of the second switch is connected to the third terminal of the first switch, and the first terminal of the second switch is connected when the first terminal of the first switch is coupled to the second terminal When the first terminal and the third terminal of the first switch are connected, 3. The matrix switch according to claim 2, wherein the first terminal and the third terminal of the second switch are coupled to each other. 5. The matrix switch according to claim 3, wherein the contacts of the first switch and the second switch are driven by a common actuator.