JPH0321099Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a telephone paging amplifier that can accommodate various specifications simply by replacing jumper wires between internal terminals.

As shown in FIG. 1, the telephone paging amplifier 7 connects a plurality of button telephones 8 (hereinafter referred to as telephones) to the drop-in line 2 from the telephone office, operates the switch of each telephone, and uses the handset of the telephone. , with the purpose of public address broadcasting.

The symbols in Figure 1 are: 1: Telephone office, 2: Service line,
3: Main telephone, 4: Disconnector, 5: Main device, 6: Broadcast coupling unit, 7: Paging amplifier, 8: Telephone, 9: Connector, 10: Speaker.

To operate the loudspeaker broadcast, press the pushbutton switch 11 of the telephone 8, the paging amplifier 7 will automatically turn on, and while the pushbutton switch 11 is held down, use the handset of the telephone 8 as a microphone, and use the speaker 10. Broadcasting can be done from here.

After the broadcast ends, when the user releases the pushbutton switch 11, the power to the paging amplifier 7 is turned off.

Currently in Figure 1, from telephone office 1, drop-in line 2,
This telephone set 3, disconnector 4, and so on are based on the unified specifications of the telephone office.

However, there are several manufacturers of the main device 5 and broadcast coupling unit 6 that are connected to the disconnector 4, and each manufacturer has a different method of connecting the paging amplifier 7.

In FIGS. 2 to 4, the electrical wiring for driving the paging amplifier 7 of the broadcast coupling unit 6 and the portion to be constructed on site are shown by broken lines.

Symbols in the figure indicate RL: relay coil, rl ₁ : relay contact, rl _1a /rl _1b : relay contact, D ₁ : diode, Q ₁ : transistor, 10: speaker.

FIG. 2 shows a broadcast coupling unit 6 and a paging amplifier 7, which have the function of supplying 100V AC power directly from the broadcast coupling unit.

The excitation of RL ₁ in the broadcast coupling unit 6 opens and closes contacts RL _1a and RL _1b , which turns on the paging amplifier 7.
Turns on and off to drive the speaker 10.

Figure 3 shows the connection from the broadcast coupling unit 6 for broadcasting.
A broadcast coupling unit 6 and a paging amplifier 7 are shown, which have the function of supplying a small-capacity DC power supply that can operate RL ₂ .

In this case, as shown by the broken lines RL ₂ and RL ₂ , it is necessary to add relay RL ₂ during on-site installation work.

In operation, when the pushbutton switch 11 of the telephone 8 is pressed, the transistor _Q1 is turned on, and the DC power source excites the relay _RL2 , closes the contact _rl2 , and drives the paging amplifier 7.

At this time, the construction contractor must purchase the relay RL ₂ specified by the broadcast coupling unit manufacturer and perform wiring work as specified.

FIG. 4 shows the case of a broadcast coupling unit 6 having a small capacity relay built therein.

At this time, the construction contractor selected relay RL ₄ that matched the capacity of the amplifier, and installed external wiring so that RL ₃ would drive relay RL ₄ of the matching capacity, which would also drive amplifier 7. .

That is, the RL ₃ relay coil is excited by the push button switch 11 of the telephone 8, and the paging amplifier 7 is driven by opening and closing the contact RL ₃ .

In this way, there are three types of broadcast coupling units 6 as shown in Figures 2 to 4, and when carrying out construction work, select a power relay with an appropriate type and capacity, and use a wiring method that is compatible with the broadcast coupling unit. This placed a heavy burden on the on-site installation workers. This has hindered the spread of telephone paging.

The present invention has been made in order to provide a paging amplifier that is easy to construct and reduces the on-site construction required for telephone paging, which is a drawback of the conventional type.

Another purpose of this invention is to reduce the burden on distribution of telephone paging amplifiers (there is no need for manufacturers to stock multiple types) by adapting one type to multiple types of broadcast coupling units. It was done.

A third purpose of the present invention is to popularize convenient telephone paging by facilitating industrial businesses and wholesalers.

The configuration of the present invention includes a power relay 15 that has a relay contact on the secondary side of a rectifier circuit 24 that converts AC power into DC and is excited by DC, and a DC power terminal between the rectifier circuit and the relay contact. The above object is achieved by providing a device (terminal board in the embodiment) for separating the wiring between the control terminals of the relay.

In other words, if the proposed paging amplifier is used for different broadcast coupling units, one model can handle three types of paging amplifiers by simply replacing the connections between the terminals, without having to select or modify the paging amplifier (from three types). To obtain a paging amplifier that can correspond to a broadcast coupling unit 6.

That is, as shown in FIG. 5, the amplifier circuit 23 includes a power transformer 13, a rectifier 14, a power relay RL ₅ 15,
Diode 16, smoothing capacitor 17, terminal board
A paging amplifier 22 is configured by attaching a TB 18, a terminal plate TB ₂ 19, a power supply terminal 20, and an amplifier input terminal (for signals) 21.

If the paging amplifier 22 is configured in this way,
Paging amplifier terminal board TB ₁ 18, terminal board TB ₂
19. Just by replacing the wiring of the power terminal 20,
It can correspond to the three types of broadcast coupling units 6 shown in FIGS. 2 to 4.

Wiring replacement between terminals is shown in FIGS. 6 to 8. FIG. 6 shows, with broken lines, the replacement portion of wiring between terminals when connecting to the conventional broadcast coupling unit 6 of FIG. 2.

Hereinafter, FIG. 7 shows the broadcast coupling unit 6 of FIG.
FIG. 8 shows the replacement part of the wiring between the terminals when connecting with the broadcast coupling unit 6 of FIG. 4 with broken lines.

The operation will be explained with reference to FIG.

This broadcast coupling unit 6 has a built-in relay RL ₁ and its contacts RL _1a and RL _1b , and has the function of directly opening and closing the power supply to the paging amplifier 22 using these contacts.

In FIG. 6, wiring between the terminals of the paging amplifier 22 is done as shown by broken lines.

That is, connect 1, 2, and 3 of TB ₁ 18 to each other,
4 and 5 to 1 and 2 of TB ₂ , and further short-circuit 1 and 2 of TB ₂ .

The power supply terminal 20 is connected to a power outlet 25 of the broadcasting coupling unit 6.

With this wiring, operating the push button switch 11 of the telephone 8 will excite the relay RL ₁ in the broadcast coupling unit 6, turning on its contacts rl _1a and rl _1b .
Then, power is supplied to the paging amplifier 22 via the power outlet 25, and the speaker 10 emits sound.

Next, the replacement of the wiring between the terminals when connecting with the conventional broadcast coupling unit 6 of FIG. 3 is shown by broken lines in FIG.

That is, 3 and 4 of TB ₁ 18, 1 each of TB ₂ 19
and 2, 1 and 2 of TB ₂ are connected to broadcast coupling unit 6.

Further, the power supply terminal 20 is connected to a 100V traffic power supply.

If you wire it like this, the push button switch 11 of the telephone 8 will turn on the transistor Q1.
The RL ₅ relay 15 is energized to close the contact RL ₅ and power is supplied to the amplifier circuit 23.

At this time, the back electromotive force prevention diode of the RL ₅ relay 15 is connected to the diode in the broadcast coupling unit 6.
Since D ₁ is used, there is no problem even if the wiring to the broadcast coupling unit 6 is connected with the wrong polarity.
RL ₅ can operate.

Next, the replacement of wiring between the terminals when connecting to the conventional broadcast coupling unit 6 of FIG. 4 is shown by broken lines in FIG.

That is, connect 1, 2, and 3 of TB ₁ 18 to each other,
4 and 5 are connected to the broadcast coupling unit 6 via TB ₂ 19 1 and 2, respectively.

The power terminal 20 is connected to an AC power source (100V).

With this wiring, the relay RL ₃ will be energized by operating the push button switch 11 of the telephone 8.
By turning on the contact rl ₅ , the speaker 10
emit a sound from.

In this way, the terminal 18 of the paging amplifier 22
If only the wiring between 19 and 19 is replaced as shown in FIGS. 6 to 8, a single paging amplifier can be used to connect the three types of broadcast coupling units 6 and amplifiers 7 shown in FIGS. 2 to 4.

This not only benefits the manufacturer of the paging amplifier 22, but also has a great effect on the installers of the main device 5, telephone 8, and speaker 10 shown in FIG.

That is, in the past, there were three types of broadcast coupling units 6, and it was necessary to modify the amplifiers 7 corresponding to different broadcast coupling units 6 for each construction, but it is possible to prepare only one type of paging amplifier 22, shown in Fig. 5 of the present proposal. I'm getting better.

[Brief explanation of the drawing]

Figure 1 shows 1. when installing the proposed paging amplifier. From the telephone office, 2. Lead line, 3. This telephone, 4. Separator, 5. Main device, 6. Broadcast coupling unit, 7. Amplifier, 8. Telephone, 9. connector,
10. Speaker, 11. The system diagram showing the wiring leading to the telephone push button switch. Figure 2 shows the conventional
7. an amplifier; 6. 6. Connection example of broadcast coupling unit. AC 100V directly from inside the broadcast coupling unit
Can supply power. The symbols in the diagram are: RL ₁ : Relay coil, RL _1a /
rl _1b , contact of RL ₁ , 8. Telephone, 11. Telephone pushbutton switch, 10. Shows the speaker. Third
The figure shows a system that has the function of supplying small-capacity DC power that can operate relay RL ₁ from the broadcast coupling unit.
6. 7. a broadcast coupling unit; The paging amplifier connection is shown. Figure 4 shows 6. In the broadcast coupling unit, 7. A relay that remotely controls the paging amplifier, with RL ₁ and same contact RL ₁ ,
6. 7. a broadcast coupling unit; The paging amplifier connection is shown. Symbol 24 in the figure indicates the power supply of RL ₄ . FIG. 5 is a wiring diagram of the 22 paging amplifier of the present invention, and is a connection diagram of the 22 paging amplifier of the present invention. The following items are included with the paging amplifier. 15: Relay RL ₅ , 1
6: Diode, 18: Terminal board TB ₁ , 19: Terminal board TB ₂ . 6 to 8 are wiring diagrams showing the relationship between the paging amplifier 22 of the present invention, 6: broadcast coupling unit, 8: telephone public address 11, and push button switch. The symbol in the diagram is the fifth
Same as figure.

Claims (1)

[Claims for Utility Model Registration] A rectifier circuit that converts alternating current into direct current, an amplifier circuit, a switch device inserted between the rectifier circuit and the amplifier circuit, a control drive circuit that controls the switch device,
The + pole output terminal and the – pole output terminal of the above rectifier circuit,
A switching device is provided for changing the connection between the + pole output terminal and the − pole output terminal of the control drive circuit, and the control drive circuit is rectified by changing the connection of the switching device according to the type of broadcast coupling unit. Connect between the + and - output terminals of the circuit, connect the AC power supply to the input of the rectifier circuit via the switch of the broadcast coupling unit, and connect the control drive circuit to the + terminal of the DC power supply of the broadcast coupling unit. Connect between the A paging amplifier device characterized in that it is connected via a connection switch of a coupling unit.