JPH0434618Y2 - - 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, in order to increase the number of inputs and outputs in such a select distributor configuration, the number of wires and switches corresponding to the product of the number of inputs and outputs is required. The number of amplifiers or the amplification factor had to be increased accordingly, and since they were generally custom-made products, they were 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/output terminals by connecting them together. This is what I am trying to do.

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. An adapter for interconnecting and merging at least two video signal select distributors in which one or more outputs are respectively connected to one desired input via each line amplifier, , at least two groups of true input terminal arrays divided into groups corresponding to the at least two select distributors, each group consisting of the same number of true input terminals corresponding to the input terminals of each select distributor; At least two groups of relay terminal rows each consisting of an array of a plurality of relay terminals to be respectively connected to the plurality of input terminals in each select distributor, and each of the same numbered relay terminal rows in the at least two groups of true input terminal rows. When arbitrarily and selectively connecting at least one of the terminals to each corresponding terminal with the same number in the at least two groups of relay terminals via a distribution amplifier, two terminals are connected to one relay terminal. At least two input selection switches respectively connected to the same numbered relay terminals of at least two groups, in order to carry out the connection provided that two true input terminals are not connected in a stacked manner; a merging switch circuit comprising at least two distribution amplifiers each having an output commonly connected to the input side of the two selection switches and an input respectively connected to each corresponding true input terminal of the same number; This is an adapter for connecting multiple select distributors equipped with the following functions to each other for combined use.

Effect According to the above configuration, the number of input terminals is equal to the total number of inputs of multiple select distributors installed in parallel, and the number of outputs is also equal to the total number of outputs of each select distributor, and these input/output It is possible to provide a select distributor with expanded input and output, which has a substantially satisfactory matrix switching function between the two.

Embodiment Figure 1 shows an extension adapter and two 6-input devices connected to it in one embodiment of this invention.
This shows the wiring circuit of a 6-output select distributor.

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 ⁶ on the left side of the figure are the six line input terminals of the select distributor, and Sa ¹ , Sa ² ...Sa ⁶ selectively select the signals from the line input terminals as desired. The accessory switches Sm ¹ , Sm ² ... Sm ⁶ are used to route the input signals from each line input terminal A ¹ , A ² ... A ⁶ connected through the accessories as desired to the line outputs, respectively. A monitor switch for connecting to a monitor TV if desired, AMPm is an amplifier in the monitor circuit, and Amon is a monitor terminal. ^The output sides ^{of the} accessory switches Sa ¹ , Sa ^{2 .} Each of the five inputs of these select switches So ¹ , So ² ... So ⁶ is connected to the own number input line (for example, switch So ¹
Input terminal A is connected to each input line other than the ¹ line). Each switch So ¹ , So ²
...The output lines from the single selection contact in So ⁶ are respectively line amplifiers AMP ¹ , AMP ² ...
AMP ⁶ , and the outputs of these amplifiers are connected to line output terminals Ao ¹ , Ao ² . . . Ao ⁶ .
This select distributor assumes that the output and input of each VTR, etc. are connected to the input/output terminals with the same number, and in this case, the select distributor has its own number to prevent its own output from being accepted as input. This is a configuration of an exclusion type select distributor. However, even if each select switch So ¹ , So ² ... So ⁶ has 6 selection input contacts and is a select distributor that can also select the input line of its own number, the expansion adapter described below It can be applied as is.

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 center of the figure, whose input terminal group becomes the true input terminal when the adapter is connected, and its output terminal group serves as the input terminal of each corresponding select distributor. It is used as a relay terminal to be connected to. Relay terminals A ¹ ′, A ² ′...A ⁶ are selection switches respectively.
SWA ¹ , SWA ² ... are connected to the selection or pole contacts of SWA ⁶ , and the relay terminals B ¹ ′, B ² ′ ... B ⁶ ' are connected to the selection or pole contacts of SWB ¹ , SWB ² ...SWB ⁶ , respectively. connected to the contacts. These selection switches have two selected contacts, and the selected contacts of each of the switches SWAi and SWBi with corresponding numbers are connected to the output of the same relay terminal amplifier Mai or Mbi. A relay amplifier having an output connected to the selected contact of one select switch SWAi and one select switch SWBi of the same number.
The inputs of Mai or Mbi are each connected to a plurality of corresponding true input terminals. That is, in the figure,
The lower selected contact of each select switch is an amplifier.
Ma ¹ , Ma ² ... Ma ⁶ are connected to the true input terminals a ¹ , a ² ... a ⁶ shown on the left side of the figure, and the selected contacts on the upper side of the figure are connected to the amplifiers Mb ¹ , Mb ² ... It will be connected to the true input terminals b ¹ , b ² . . . b ⁶ shown on the right side of the figure via Mb ⁶ .

In the above configuration, relay terminals A ¹ ′, A ² ′...
A ⁶ ' is the input terminal A ¹ , A ² . . . of the select distributor A.
^A6 , and the relay terminals ^B1 ', ^B2 '... ^B6 ' are connected to the input terminals ^B1 , ^B2 ... ^B6 of the select distributor B, respectively. True input terminals a ¹ , a ² ... a ⁶ and b ¹ , b ² of the extension adapter 1 connected in this way
...b ⁶ has multiple video sources, e.g.
VTRa ¹ , VTRa ² ...VTRa ⁶ and VTRb ¹ ,
VTRb ² ...The outputs of VTRb ⁶ are connected respectively. Therefore, each output terminal Ao ¹ , Ao ² ... Ao ⁶ and
Appropriate display devices such as TV screens are connected to Bo ¹ , Bo ^{2 .} . . Bo ⁶ , respectively. In such a connection configuration, normally only a single video source output is connected to the input terminal Ai or
Bi can be selectively connected to one of the two video sources connected to the two true input terminals ai and bi, each having the same subscript number as its own number. For example, input terminal A ¹ is
By setting SWA ¹ to the upper position as shown in the figure, the output of VTRb ¹ is received via amplifier Mb ¹ , and by setting switch SWA ¹ to the lower position, the output of VTRa ¹ is received via amplifier Ma ¹ . can be received. In this case, amplifiers Ma ¹ and Mb ¹ are inserted to prevent the corresponding video signals from being attenuated by being divided into two when switches SWA ¹ and SWB ¹ receive output from the same amplifier. This is to compensate. This applies to all other amplifiers Ma ¹ , Ma ² ... Ma ⁶ and Mb ¹ , Mb ² ...
The same applies to Mb ⁶ .

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. However, in Fig. 3, each adjacent pair of thick vertical lines on the side of machine A and machine B means that either the a source side or the b source side input is selected at once, and the inputs in the same select distributor are the same. This means that the other input of the number (for example, bi for ai) cannot be selected, and the present invention performs the expansion matrix switching function under such constraints.

Effects of the invention As described above, the present invention uses a select distributor expansion adapter with a simple circuit configuration to reduce the number of wiring and amplifiers by a much smaller amount than when custom-ordering a single select distributor with multiple inputs and outputs. This enables almost complete matrix switching distribution between multiple inputs and multiple outputs without any increase in number.

Note that this expansion adapter has an input type structure that connects to the input side of the select distributor, so if you only want to increase the number of inputs in one existing select distributor, use another select distributor. By combining only an expansion adapter with a larger number of terminals with that one select distributor (typically, by combining adapter 1 with either select distributor A or B as shown in Figure 1). combination) can perform its function.

[Brief explanation of the drawing]

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 claim for utility model registration] A plurality of input terminals A ¹ , A ² ..., B ¹ , B ² ...,
It has a plurality of output terminals Ao ¹ , Ao ² ..., Bo ¹ , Bo ² ..., and one or more desired outputs are connected to each desired one through a matrix switching circuit between these input and output terminals. An adapter for mutually connecting at least two video signal select distributors A, B, which are connected to one input via each line amplifier for combined use, Select distributor A, B...
Each group has the same number of true input terminals a ¹ , a ² ... corresponding to the input terminals of each select distributor.
..., b ¹ , b ² ..., at least two groups of true input terminal arrays, and a plurality of input terminals A ¹ , in each select distributor.
A plurality of relay terminals A ^{1 ′} , A 2 ′…, B ¹ ′, B ² ′… to be connected to A ² ……, ^{B 1 ,} B ² ……, respectively
at least two groups of relay terminal rows consisting of an arrangement of at least two groups, and at least one of the terminals ai, bi, . . . with the same number in the at least two groups of true input terminal rows, and When arbitrarily and selectively connecting terminals Ai′, Bi′, etc. with the same corresponding numbers in the relay terminals via a distribution amplifier, two true input terminals should not be connected to one relay terminal in an overlapping manner. In order to perform the connection on the condition that at least two groups of relay terminals Ai', Bi'...
at least two input selection switches SWAi, SWBi, respectively connected to the input selection switches SWAi, SWBi..., outputs commonly connected to the input sides of the at least two selection switches, and corresponding true input terminals of the same number. A merging switch circuit for merging a plurality of select distributors connected to each other, characterized in that the merging switch circuit includes at least two distribution amplifiers Mai, Mbi, etc., each having an input connected to adapter.