JPH0434619Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to an adapter for interconnecting a plurality of select distributors for combined use.

BACKGROUND OF THE INVENTION Conventionally, multiple input/multiple output select distributors have been used as connection adapters for selectively connecting or distributing multiple video sources to multiple TV screens. This select distributor selectively connects a plurality of input terminals and a plurality of output terminals via a matrix switching circuit, and preferably includes a line amplifier having an amplification factor according to the allowable number of distributions from one input. It is configured to have as many inputs as there are.

Problems to be Solved by the Invention However, if you try to increase the number of inputs in such a select distributor configuration, you will need the number of wires and switches corresponding to the increase in the number of inputs, and the number of amplifiers or The amplification factor must also be increased accordingly, and since they are generally custom-made products, they are extremely expensive.

In order to solve the above problem, this invention provides an expansion adapter that allows multiple existing select distributors to function as a single select distributor with an increased number of input terminals by connecting them together. That is.

Means for Solving the Problems In order to achieve the above object, the present invention has a plurality of input terminals and a plurality of output terminals, and provides desired switching between these input and output terminals via a matrix switching circuit. One or more output terminals each have one or more desired output terminals.
An expansion adapter for jointly using at least two video signal select distributors each having the same number of output terminals connected to one input terminal via each line amplifier, A row of true output terminals of the same number corresponding to the select distributor output terminals, and a plurality of rows of true output terminals that are divided into groups corresponding to each select distributor, and each group is connected to the same number of output terminals in each select distributor. at least two groups of relay terminal rows consisting of relay terminals; and one of the terminals with the same number in the at least two groups of relay terminal rows is connected to the terminal with the corresponding number in the true output terminal row. This is an adapter for adding a select distributor, which is equipped with a merging switch circuit including a plurality of input selection switches provided corresponding to each true input terminal row in order to selectively connect to the true input terminal row.

Effect According to the above configuration, the number of input terminals is equal to the total number of inputs of the multiple select distributors installed together, and the number of outputs is equal to the number of outputs of the expansion adapter, and a complete matrix is created between these inputs and outputs. It is possible to use a select distributor with expanded inputs having a switching function.

Embodiment Figure 1 shows an extension adapter and two 4-input devices connected to it in one embodiment of this invention.
This shows the wiring circuit for a 16-output select divider.

First, the two select distributors A and B will be explained. These select distributors have exactly the same configuration except for being distinguished by the reference characters A and B in the figure, so the select distributor A shown on the left side will be described here. A ¹ , A ² , A ³ , and A ⁴ at the left end of the diagram are the four line input terminal blocks of the select distributor, and within each block, each terminal IN is used as a terminal to actually connect a video source, and the output The and in terminals are accessory connection terminals for selectively guiding signals from the line input terminal IN to the line output through desired accessories, and are short-circuited when no accessories are used. However, in the following explanation
A ¹ , A ² , A ³ , and A ⁴ will be simply referred to as "input terminals." DIS ¹ , DIS ² , DIS ³ , DIS ⁴ are distribution circuits for distributing 16 input signals from each line input terminal A ¹ , A ² , A ³ , A ⁴ connected through accessories as desired, AMPa,
AMPb, AMPc, and AMPd are amplifiers in charge of 4 distributions in each distribution circuit, and in Figure 1,
Although only DIS ¹ is shown, it is assumed that the other three distribution circuits are similarly equipped.
Select switch located on the output side of the distribution circuit
SW ¹ , SW ² ...SW ¹⁶ each have 4 inputs,
i.e. it has selected contacts, to which each corresponding one of the 16 input distribution lines (via a distribution amplifier) from the input terminals A ¹ , A ² , A ³ and A ⁴ is connected. . Among the distribution lines from each distribution circuit to each switch, the one with its own number (for example, DIS ¹
On ^- off switches SWa, SWb, SWc,
When SWd is inserted and it is set to the "open" position, the distribution line will not be able to select its own number line input. Select switch SW ¹ ,
Each output side of ^SW2 ... ^SW16 , ie, the selection or polar contact, is connected to the line output terminals ^Ao1 , ^Ao2 ... ^Ao16 , respectively.

The select distributor B shown on the right side of the figure is the same as the aforementioned A.
It has already been stated that the structure is similar to that of , and accordingly, the corresponding parts will be given the corresponding subscripts or numbers and the explanation will be omitted.

The expansion adapter 1 of the embodiment has a connection circuit as shown in the lower center of the figure, and its output terminal group becomes the true output terminal when the adapter is connected, and its input terminal group serves as the output of each corresponding select distributor. It is used as a relay terminal connected to a terminal. Relay terminals a ¹ , a ² ... a ¹⁶ are respectively connected to one selected contact of two-way selection switches SWo ¹ , SWo ² ... SWo ¹⁶ , and relay terminals b ¹ , b ² ...
...b ¹⁶ are the selection switches SWo ¹ and SWo ² , respectively.
...Connected to the other selected contact of SWo ¹⁶ . The output sides of these selection switches, ie selection contacts, are connected to adapter output terminals (true output terminals) o ¹ , o ^{1 .} . . o ¹⁶ having corresponding appended numbers.

In the above configuration, relay terminals a ¹ , a ² ... a ¹⁶
are the output terminals Ao ¹ , Ao ² ... of select distributor A.
The relay terminals b ¹ , b ² . ^. . b ¹⁶ are connected to the output terminals Bo ¹ , Bo ^{2 .} . . Bo ¹⁶ of the select distributor B, respectively. The true output terminals o ¹ , o ² ... o ¹⁶ of the expansion adapter 1 connected in this way are connected to the input terminals of multiple video displays, such as recorders, monitors, RM ¹ , RM ² ... RM ¹⁶ , respectively. Connected. Therefore, a VTR or the like as a video source is connected to each input terminal A ¹ , A ² ...A ¹⁶ and B ¹ , B ² ...B ¹⁶ of the select distributors A and B used together. . In such a connection configuration, the select distributors A and B, which selectively distribute only the (in this case, four) video source outputs connected to the own machine's input, are usually given the same number as the own machine's output terminal. The true output terminal of the adapter 1 can be selectively connected to any of the video sources of the AB2 machines. For example, by setting the switch SWo ¹⁶ to the upper position as shown in the diagram, the true output terminal a ¹⁶ is connected to the switch SW ¹⁶ of the A machine.
Receive any of the inputs A ¹ , A ² , A ³ , A ⁴ through the switch SW ¹⁶ of the B machine by setting the switch SWo ¹⁶ to the lower position.
You can receive any of the B ¹ , B ² , B ³ , or B ⁴ diagrams.

In the end, the functions of the two select distributors A and B using the expansion adapter of the present invention are summarized as follows.
Select distributors with matrix switching circuits as schematically illustrated in FIGS. 2A and 2B can be combined to obtain a matrix switching circuit as schematically illustrated in FIG. 3. That is, in Fig. 3, adapter output terminals o ¹ , o ² ... om are connected to machine A and machine B.
Corresponding output lines Ao ¹ , Ao ² ... on the machine side
...Aom or Bo ¹ , Bo ² ... Since the signal input from either Bom is selectively supplied, this means that all inputs of machine A and machine B can be arbitrarily selected to any output terminal of the adapter. The present invention exhibits such an expanded matrix switching function.

Effects of the invention As described above, the present invention is simple and uses a select distributor extension adapter with a circuit configuration that does not include a power supply, which makes wiring wiring easier than when custom-ordering a single select distributor with multiple inputs and outputs. This enables almost perfect matrix switching distribution between multiple inputs and multiple outputs without significantly increasing the number of amplifiers.

In addition, this expansion adapter has an output type structure that connects to the output side of multiple select distributors, so it can be used when you want to increase only the number of inputs in a select distributor that has more outputs than the existing inputs. (Typically, for example, if two select distributors both have n inputs and 2n outputs, an adapter 1 with the same number of relay terminals and true output terminals
(by using a complete matrix switching circuit) an effective expansion function can be achieved.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing an example of connection and use of an embodiment of this invention, Fig. 2 is a schematic diagram of two select distributors used together, and Fig. 3 is a schematic diagram of two select distributors used together with the adapter of this invention. FIG. 3 is a connection principle diagram when used in combination. A, B...Select distributor, 1...Adapter.

Claims (1)

[Scope of claims for utility model registration] Multiple input terminals A ¹ , A ² ... and B ¹ , B ² ...
and multiple output terminals Ao ¹ , Ao ² ... and Bo ¹ , Bo ²
..., each of which has one or more desired output terminals connected to each desired input terminal via a line amplifier via a matrix switching circuit between these input and output terminals. An expansion adapter for the combined use of at least two video signal select distributors A, B... having the same number of output terminals Ao ¹ , Ao ^{2 .}
. . . and Bo ¹ , Bo ^{2 .} . . corresponding to the same number of true output terminals o ¹ , o ² . A plurality of relay terminals a ^{1 , a 2 . . . to be respectively connected to the same number of output terminals Ao 1 ,} Ao ^{2 .} . . and Bo ¹ , Bo ^{2 . .} . in the select distributor.
..., b ¹ , b ² ..., at least two groups of relay terminal rows, and at least two groups of relay terminal rows a ¹ , a ² ...,
b ¹ , b ² ... to each true input terminal in order to selectively connect one of the same numbered terminals ai and bi to the corresponding numbered terminal oi in the true output terminal row. Multiple input selection switches provided correspondingly
A selection distributor expansion adapter characterized by being equipped with a merging switch circuit including SWo ¹ , SWo ² ...