JP2513425B2 - Matrix switch - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch structure for switching connection between multiple inputs and multiple outputs.

[0002]

2. Description of the Related Art FIG. 2 is a circuit diagram showing an example of a conventional switch of this type. In FIG. 2, this switch is
It is a switch with four poles, that is, four inputs and four outputs, and has input terminals 210 _{1 to} 210 ₄ and an output terminal 220 _1.
And 220 _4, and a switch portion 230 _{1-230 4} comprising contacts plurality openable between each input terminal and the output terminal (4 in the case of FIG. 2).

This switch is used by performing an operation of closing a switch portion between an input terminal and an output terminal to be connected for each output terminal.

Such a switch is sometimes called a matrix switch because its circuit has a matrix shape.

[0005]

In this conventional switch, the inputs may be connected to each other by setting the connection incorrectly, that is, by closing a plurality of contacts in one switch. There is a problem that a short circuit occurs in a circuit on the input side when the inputs are connected to each other. Further, since the number of contacts that can be opened and closed is equal to the product of the number of inputs and the number of outputs, there is a problem that the structure is complicated and the operation is complicated.

An object of the present invention is to provide a matrix switch in which the inputs are not connected to each other and the safety of the circuit on the input side can be ensured.

Another object of the present invention is to provide a matrix switch which has a simple structure and is easy to operate even if the number of inputs and outputs is large.

[0008]

According to the present invention, m (m
Is a positive integer) input terminals and n (n is a positive integer including m) output terminals, in a matrix switch, a common terminal, a spring contact having the common terminal as a fulcrum, and the spring contact. There are n contact rows in which m switches each consisting of a connection terminal that is opened and closed between are arranged, and in these contact rows, the m common terminals of the first contact row correspond to the corresponding m terminals. It is connected to the input terminal and m
Connection terminals are respectively connected to the corresponding common terminals of the next contact row, are arranged in parallel with the contact row, and are provided with electrodes at positions corresponding to the spring contacts, and all electrodes in one row N electrode rows that are commonly connected to the corresponding output terminals, and one each is slidably disposed between the contact rows and the electrode rows, and is connected to the spring contact of one switch and the connection. A matrix switch is obtained, which is characterized in that it has an opening between the terminal and a slide contact portion for electrically connecting the spring contact and the corresponding electrode.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A matrix switch according to an embodiment of the present invention will be described below with reference to the drawings.

The matrix switch according to the present invention has m
It has (m is a positive integer) input terminals and n (n is a positive integer including m) output terminals.

FIG. 1 is a diagram showing a matrix switch according to an embodiment of the present invention. This matrix switch is
When the number of input terminals m and the number of output terminals n are each three, that is, a matrix switch of 3 input and 3 output type.

In FIG. 1, the matrix switch is
Input terminals 10 ₁ to 10 ₃ and the output terminals 20 ₁ to 20 ₃
And contact rows 30 ₁ to 30 ₃ and electrode rows 40 ₁ to 40
₃ and slide contact portions 50 ₁ to 50 ₃ .

The contact rows 30 ₁ to 30 ₃ are arranged in parallel with each other, and each includes a common terminal 31 and a spring contact 32 with the common terminal 31 as a fulcrum, and a connection terminal 33 that is opened and closed between the spring contacts 32. It is equipped with three switches. In these contact arrays, the three common terminals 31 of the first contact array 30 ₁ respectively correspond to the corresponding input terminals 10 ₁ to ₁ 1.
0 ₃ , and three connection terminals 33 are connected to the corresponding common terminals 31 of the next contact row, respectively. However, since the contact row 30 ₃ is the last row and there is no next contact row, the connection terminal 33 of the contact row 30 ₃ is not connected to the common terminal 31.

The electrode arrays 40 ₁ to 40 ₃ are connected to the contact arrays 30 ₁ to 30 _3.
Arranged in parallel to the 30 _3, provided with a respective electrode 41 at a position corresponding to the spring contact 32 are commonly connected to the output terminal 20 ₁ to 20 ₃ where all the electrodes 41 of one row corresponds.

The sliding contact portions 50 ₁ to 50 ₃ are slidably arranged one by one between the contact rows 30 ₁ to 30 ₃ and the electrode rows 40 ₁ to 40 _3, and one switch spring contact 32 is provided. And the connection terminal 33 are opened. With this,
Electrodes 51 provided at both ends and electrically connected to each other
The electrode 52 short-circuits the spring contact 32 and the electrode 41.

That is, the slide contact parts 50 ₁ to 50 ₃ are
When the position of one switch is reached, the spring contact 32 is engaged with the spring contact 32 and biased in a direction away from the connection terminal 33 to open the space between the spring contact 32 and the connection terminal 33. Moreover, the spring contact 32 and the electrode 41 corresponding thereto are short-circuited. In other words, the slide contact parts 50 ₁ , 50 ₂ , 50 ₃ are respectively connected to the output terminals 20 ₁ ,
20 ₂ and 20 ₃ , and the input terminals 10 ₁ to 10 ₃ correspond to the respective slide contact positions 50 ₁ to 50 _{3 in} the sliding direction, and these are regarded as a matrix. The short-circuit connection is made by arranging the slide contact portions at the intersections of the extension lines of and the extension lines of the output terminals. Moreover, the short-circuit connection between each input terminal and each output terminal is one-to-one, and the other connection is designed to be broken by the spring contact being urged. Therefore, FIG.
In this matrix switch, only the input terminal 10 ₁ and the output terminal 20 ₂ , the input terminal 10 ₂ and the output terminal 20 ₁ , and the input terminal 10 ₃ and the output terminal 30 ₃ are connected to each other.

As described above, in the matrix switch according to this embodiment, only the desired portion of the input terminal and the output terminal can be connected by a simple operation.

Although the matrix switch according to the present embodiment has three input terminals m and three output terminals n, the matrix switch according to the present invention has the same number of input terminals m and output terminals n. It is not limited and may be a positive integer.

[0019]

In the matrix switch according to the present invention, the input terminal and the output terminal can be connected to each other only at a desired time, so that the inputs are not connected to each other and the circuit of the input side is not connected. Safety is secured.

Further, since the connection between the input terminal and the output terminal which are not desired to be connected is automatically cut off, the structure is simple and the number of operating steps is the number of outputs even if the number of inputs and outputs increases. Good and easy to operate.

[Brief description of drawings]

FIG. 1 is a diagram showing a matrix switch according to an embodiment of the present invention.

FIG. 2 is a circuit diagram showing a matrix switch according to a conventional example.

[Explanation of symbols]

10 ₁ to 10 ₃ Input terminal 20 _{1 to} 20 ₃ Output terminal 30 ₁ to 30 ₃ Contact row 40 ₁ to 40 ₃ Electrode row 50 ₁ to 50 ₃ Slide contact portion 31 Common terminal 32 Spring contact 33 Connection terminal 41 Electrode 51, 52 Electrode 210 _{1 to} 210 ₄ Input terminal 220 _{1 to} 220 ₄ Output terminal 230 _{1 to} 230 ₄ Switch unit

Claims (2)

(57) [Claims] 1. m (m is a positive integer) input terminals and n
In a matrix switch having (n is a positive integer including m) output terminals, the matrix switch includes a common terminal, a spring contact having the common terminal as a fulcrum, and a connection terminal which is opened and closed between the spring contact. N contact rows with m switches
In these contact rows, the m common terminals of the first contact row are connected to the corresponding m input terminals, and the m connection terminals correspond to the next contact row, respectively. N connected to the common terminal, arranged in parallel to the contact row, each having an electrode at a position corresponding to the spring contact, and commonly connecting all the electrodes in one row to the corresponding output terminal. The electrode row and the contact row and the electrode row are slidably arranged one by one between the rows to open the spring contact and the connection terminal of one switch, and A matrix switch having a contact and a slide contact portion for electrically connecting the corresponding electrode. 2. The slide contact part engages with the spring contact when the position of the one switch is reached, and urges the spring contact in a direction separating from the connection terminal to connect the spring contact and the connection terminal. 2. The matrix switch according to claim 1, wherein the matrix switch is configured to be opened between the spring contact and the electrode, and the spring contact and the corresponding electrode are short-circuited.