JP3590987B2 - Switch for 2-wire TV intercom - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a two-wire television intercom used in a television intercom system, for example, installed in an apartment house, a building, or the like, and connects and sends and connects a communication line, a video line, and a signal line configured as a pair line. The present invention relates to a branching device.
[0002]
[Prior art]
Conventionally, in a two-wire television intercom switch used in a television intercom system for connecting and sending and wiring a communication line, a video line, and a signal line configured as a pair line, installed in an apartment house, a building, and the like, In some cases, some output terminals and branch terminals are not used and become empty. Thus, between the unused and unused branch terminals, for example, an F-type plug-in dummy resistor (75Ω) is connected and terminated at the time of construction. Moreover, in the above-mentioned branching devices (there is a one-branching device and a two-branching device), the terminal arrangements thereof are different from each other, so that a necessary number of branching devices are prepared in advance for the construction.
[0003]
[Problems to be solved by the invention]
However, when installing the above-described two-wire TV intercom switch, the termination process of connecting the dummy resistor (75Ω) for F-type plugging to an unused branch terminal that is not used must be done by soldering the dummy resistor. In addition, this soldering work has significantly reduced the work efficiency in the entire construction. In addition, if the number of branch devices is incorrectly prepared, it is practically difficult to quickly prepare these missing devices, and the terminal arrangements are different from each other. It was practically impossible to change from a branch to a two-branch, and conversely, to change from a two-branch to a one-branch.
The present invention has been made in view of the above points, and can perform one-touch termination processing in a case where terminals such as a branch terminal are empty, and perform a one-touch operation between a one-split device and a two-split device. It is an object of the present invention to provide a two-wire television intercom switch capable of quickly changing a terminal arrangement.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, a first aspect of the present invention is a television intercom system for connecting and sending and connecting a communication line, a video line, and a signal line, which are installed in an apartment house, a building, or the like, and configured as a pair line. In the main body, the input terminal block for inputting the communication line, the video line, the signal line, and the output terminal block for sending and wiring the communication line, the video line, the signal line. A branch terminal block connected to the attenuation circuit built in the main body, and provided to a plurality of terminals for connecting the communication line, the video line, and the signal line input from the input terminal block to the television monitor through the attenuation circuit. If, between the output terminals of the damping circuit, and a dummy terminator connected via a contact, and a dummy resistor switch for closing the contacts, the dummy switches the output terminal Bro Click is characterized by providing on the surface and the same plane exposed to the outside.
[0005]
The invention according to claim 2 is a two-wire television set used in a television intercom system for connecting and sending and connecting a communication line, a video line, and a signal line, which are installed in an apartment house, a building, or the like, and configured as a pair line. An interphone branching device, in which an unused terminal block is covered with a blind plate so that the arrangement of the terminal blocks before being covered with the blind plate is made common so that the terminal block can be properly used as a one-branch or a two-branch. It is characterized by:
[0006]
[Action]
According to the first aspect of the present invention, a dummy terminator is connected between the output terminals of the attenuation circuit via a contact, and a dummy resistance switch for closing the contact is provided. Therefore, by turning on the dummy resistor switch, a dummy resistor can be easily connected to an unused unused branch terminal in the branch terminal block. Therefore, by selecting ON / OFF of the dummy resistance switch, it is possible to easily select the termination processing of the unused branch terminal or the connection with another device such as a monitor, and the use thereof is increased. Moreover, since the termination process is not performed by soldering the F-type plug dummy resistor (75Ω) as in the past, the workability is remarkably improved.
[0007]
According to the second aspect of the present invention, the arrangement of the terminals is commonly used for both the branching device and the two-way branching device, so that the unused terminal block is simply covered with the blind plate to be easily formed as a one-way branching device or a two-way branching device. And the convenience is extremely good .
[0008]
【Example】
An embodiment according to the present invention will be described below with reference to the drawings.
(First embodiment)
FIG. 1 is a layout view of a dummy resistance switch used in a two-wire television intercom branch device according to the present invention, FIG. 2 is a circuit configuration diagram of the switch, FIG. 3 is an enlarged view of a connection portion of the switch, and FIG. It is a perspective view of the splitter for two-wire television intercoms according to the present invention.
The dummy resistance switch A shown in FIG. 1 is used for a two-wire television intercom branch unit B as shown in FIG. As shown in FIG. 1, this dummy resistance switch A is provided, for example, in the vicinity of a branch 2 requiring termination processing indicated by reference numeral 2, and switches the switch on and off by sliding the switch up and down. You can do it. The contacts of the dummy terminator 10 shown in FIG. 2 are opened and closed in conjunction with the ON / OFF of the dummy resistance switch A. As shown in FIG. 2, the dummy terminator 10 is connected through a contact 10a between output terminals of an attenuation circuit 8 provided on the branch 2 side. Specifically, a capacitor C and a resistor R are connected. The circuit configuration is as shown in FIG. Reference numeral 9 denotes an attenuation circuit on the branch 1 side.
[0009]
In the branching device for a two-wire television intercom according to the above embodiment, the termination process can be performed by turning on the dummy resistance switch A, and the circuit can be easily and reliably connected.
[0010]
Next, a description will be given of a case where the termination processing in a case where the output terminal is in an empty state is applied to a two-wire TV intercom branch system in an apartment house. That is, FIG. 4 shows a case where one branch wiring has an empty output terminal. In this case, as shown in FIG. Since the output terminal of the branch unit 11a is not used and is in an empty state, as shown in (B), wiring that can connect the monitor TV 11b on the top floor and the output terminal of the single branch unit 12a on the floor below it. Form. As a result, there is an effect that the first branch 11a on the top floor can be omitted, and the number of parts can be reduced. In addition, 12b and 13b are monitor televisions.
[0011]
In FIG. 5 exemplifying a case where the output terminal is empty in the two-branch wiring, as shown in FIG. 5A, the output terminal of the two-way splitter 11a on the top floor is not used and is empty. As shown in B), a dummy terminator is connected between the output terminals, the monitor TV 11c on the top floor is connected to the output terminal, and the dummy resistance switch A is turned on, whereby The output terminal can be easily terminated.
[0012]
Further, in FIG. 6 exemplifying a case where the branch terminal is empty in the two-branch wiring, as shown in FIG. 6A, the branch terminal of the two-way branching unit 12a on the middle floor is not used and is empty. As shown in (B), a dummy terminator is connected between the branch terminals of the two-branch device 12a, and the dummy resistor switch A is turned on to easily terminate the branch terminal. be able to.
[0013]
(Second embodiment)
FIGS. 7 to 9 show a 2-wire television intercom splitter that can be used as a splitter or a splitter. FIG. 7 shows a terminal arrangement when used as a single splitter, and FIG. FIG. 9 shows a terminal arrangement when used as a two-way distributor. In these drawings, 1 is a branch terminal block 1, 2 is a branch terminal block 2, 3 is an output terminal block, 4 is an input terminal block, and in the case of embedded wiring construction, it is led out from the electric wire insertion hole 22. The core wires of the electric wires (communication lines, video lines and signal lines) are inserted into the terminals of the terminal blocks. Note that the terminals in this case are assumed to be quick connection terminals.
[0014]
Here, the terminal arrangement shown in FIG. 7 will be specifically described. A terminal block that is not used (a portion of the branch terminal block 2 surrounded by the imaginary line 14 in the figure) is extracted or the portion is blinded as it is. Cover completely with plate 15. Although not shown, it goes without saying that a dummy resistance switch is connected between the branch terminals of the terminal block so that the termination processing is performed and the switch is turned on. This makes it possible to easily realize the terminal arrangement when used as a one-branch device, and it is possible for the end user to carry out the construction without worrying about a connection mistake or the like.
[0015]
Further, specifically explaining FIG. 8, all the terminal blocks are used, and there is no unused terminal block. In this case, there is no need to cover the terminal block with a blind plate, and the dummy resistor is not used. No switch connection is required. As described above, when the terminal block is not covered with the blind plate or the dummy resistor switch is not connected between the branch terminals, the terminal arrangement of the two-branch device is used, so that the terminal block can be used immediately as a two-branch device. .
[0016]
Further, referring to FIG. 9, terminal blocks that are not used (portions surrounded by broken lines 16 in the figure) are either removed or completely covered with blind plates 15 as they are, so that each terminal block is By adopting a wiring structure that can be used as a distributor, it can be easily used as a two-divider.
[0017]
According to the embodiment configured as described above, when the output terminal of the attenuation circuit of the branching device is vacant, a dummy resistance switch is connected between the terminals and the switch is turned on to have a simple configuration. Since the termination of the terminals can be performed, there is no need to perform an inefficient work of soldering a dummy resistor between the terminals as in the related art. Also, by sharing the terminal arrangement and covering only unnecessary terminal blocks with blind plates, it is possible to easily obtain a terminal arrangement of a one-branch, a two-branch, or a two-divider. In addition to being excellent in workability, it is possible to use the product in common and eventually standardize it, and it is possible to greatly reduce the manufacturing cost.
[0018]
【The invention's effect】
As described above, according to the splitter for a two-wire television intercom according to the first aspect of the present invention, the dummy terminator is connected between the output terminals of the attenuation circuit of the splitter, and the contact of the dummy terminator is When the dummy resistance switch is turned on, the connection can be established, and the terminal can be terminated. By this, if it is necessary to terminate the vacant terminal at the construction site, the terminal can be immediately terminated by the above switch-on, while there is no need to terminate the terminal, and when a TV monitor or the like is connected to the vacant terminal, It is possible to respond flexibly at the construction site, for example, by responding immediately by turning off the switch. In addition, as described above, the termination of the terminal can be performed with one touch by turning on the switch, and there is no need to solder an F-type plug dummy resistor between the terminals, so that the workability can be significantly improved. There is an effect that can be.
[0019]
According to the branching device for a two-wire television intercom according to the second aspect of the present invention, the unused terminal block is covered with a blind plate so that the terminal block can be easily used as a single branching device or a double branching device. The terminal arrangement before being covered with is all common. As a result, one branching device can be properly used at the construction site as needed, and there is an effect that the construction method can be unified and the construction can be reduced. And, as described above, the terminal arrangement is all common, so the housing is common, and the rational design of the 2-wire TV intercom splitter is possible, and the product can be standardized. There is an effect that the down can be measured.
[Brief description of the drawings]
FIG. 1 is a layout view of a dummy resistance switch used in a branching device for a two-wire television intercom according to the present invention.
FIG. 2 is a circuit configuration diagram showing a connection state of a dummy resistance switch in the branching device shown in FIG.
FIG. 3 is an enlarged view of a connection portion of a dummy resistance switch in FIG. 2;
FIG. 4 is a diagram for explaining empty output terminal processing in one branch wiring;
FIG. 5 is a diagram for explaining empty output terminal processing in two-branch wiring;
FIG. 6 is a diagram for explaining processing of an empty branch terminal in two-branch wiring;
FIG. 7 is a terminal arrangement diagram of a single branch device.
FIG. 8 is a terminal arrangement diagram of a two-branch device.
FIG. 9 is a terminal arrangement diagram of a two-way distributor.
FIG. 10 is an external view of a splitter for a two-wire TV intercom.
[Explanation of symbols]
Reference Signs List A A dummy resistance switch B Two-wire TV intercom branch unit 1, 2 Branch terminal block 3 Output terminal block 4, 5 Input terminal block 10 Dummy terminator 10a Contact 15 Blind plate

Claims (2)

A switch used in a television intercom system for connecting and sending and wiring a communication line, a video line, and a signal line that are installed in an apartment house, a building, and the like, and are configured as a pair line,
In its body,
An input terminal block for inputting a communication line, a video line, and a signal line;
An output terminal block for sending and wiring communication lines, video lines, and signal lines;
A branch terminal block connected to the attenuation circuit built in the main body, and a plurality of communication terminals, video lines, and signal lines input from the input terminal block , which are provided for a plurality of connections to the television monitor through the attenuation circuit; ,
A dummy terminator connected via a contact between output terminals of the attenuation circuit,
A dummy resistance switch for closing the contact,
The branch switch for a two-wire intercom, wherein the dummy switch is provided on the same surface as the surface on which the output terminal block is exposed to the outside . In claim 1,
A splitter for a two-wire television intercom, which has a structure in which the arrangement of the input terminal block, the output terminal block, and the branch terminal block is shared, and further includes a blind plate for covering an unused terminal block.

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