JPS6125351A - Telephone set - Google Patents

Abstract

PURPOSE:To improve the operability by providing a talking circuit, a dial circuit and a control voltage generating circuit to a handset so as to generate a prescribed control voltage from a control voltage generating circuit thereby allowing the control voltage to apply on/off control to an accessory function circuit of a telephone set main body. CONSTITUTION:A telephone line is connected to the telephone set main body 11 and a handset 16 is connected by a cord 17. A talking circuit 18 connected to a transmitter 21 and a receiver 22, a dial circuit 19 and a control voltage generating circuit 20 are provided to the handset 16. When a hook switch FS connected to the circuit 20 is turned on, a prescribed voltage is outputted from the circuit 20 to activate the circuit 19. Further, a voltage discriminating circuit 14 in the main body 11 is operated at the same time, and when the switch S is turned on, a prescribed voltage from the circuit 20 brings the accessory function circuit 15 into the operating state. Then the telephone set is miniaturized and its operability is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a telephone with so-called auxiliary functions, in which auxiliary function circuits such as an answering machine and a speaker horn are provided on the main body of the telephone.

Conventional Structures and Problems Generally K. Telephones with additional functions are well known, but all of these types of telephones have a telephone main body 1 with a communication circuit 2. as shown in Fig. M1. Dial switch DI.

The accessory functional circuit 31 houses all the circuits such as the incoming call detection and display circuit 4, and the accessory functional circuit 3 is connected to the telephone line by a separately provided mechanical switch S, hook switch Fs, etc.

However, in this type of device, a transmitter 6. All the circuits, except for the handset 7, are built into the telephone main body 1, and a separately provided mechanical switch S is configured to manually switch whether or not to connect the auxiliary functional circuit 3 to the telephone line. Therefore, there were problems in that the structure and appearance of the telephone main body 1 as a whole became extremely complicated and large.

In FIG. 1, Ds is a dial shunt switch that is turned on while the dial switch Di is repeatedly turned on and off.

OBJECT OF THE INVENTION The present invention eliminates the above-mentioned drawbacks of the conventional system, and is designed so that the telephone call circuit, dial circuit, auxiliary function circuit, etc. are housed separately in the hand and the telephone body, thereby reducing the overall cost. The purpose of this invention is to provide an excellent telephone that is easy to operate and can be miniaturized.

Components of the Invention The present invention is characterized in that a handset includes a telephone communication circuit, a dial circuit, a control voltage generation circuit, etc., and generates a predetermined control voltage from the control voltage generation circuit by operating a switch provided on the handset. The control voltage from the control voltage generating circuit is used to turn on and off an auxiliary functional circuit provided on the telephone main body side.

DESCRIPTION OF EMBODIMENTS FIG. 2 is a schematic configuration diagram of an embodiment of a telephone according to the present invention. In the figure, 11 is the main body of the telephone, 12 is an incoming call detection display circuit connected to the telephone line, and 13 is a circuit for applying voltage to the telephone line. Four diodes D full-wave rectify the DC voltage
D2. D8. D. Full-wave rectifier circuit consisting of 1
Reference numeral 4 denotes a voltage discrimination circuit for discriminating a control voltage, which will be described later, to turn on and off an attached functional circuit 15 such as an answering machine and a speaker horn.

16 is a handset connected to the telephone main body 11 via a cord 17; 18 is a communication circuit housed within the telephone set 16; and 19 is a dial circuit.

A control voltage generating circuit which generates a predetermined constant control voltage by a 20 hook switch Fs or a separately provided switch S, and 21 and 22 are a transmitter and a receiver connected to the communication circuit 18, respectively.

In the above embodiment, Funokusui, Chi Fs, switch S
are off, the control voltage generation circuit 2
Since 0, no output appears, and therefore, in this state, the dial circuit j9 becomes inoperable, and the voltage discrimination circuit 14 does not operate at all. If the hook switch Fs is now turned on, a predetermined constant voltage is output from the control voltage generation circuit 20, and the dial circuit 19 becomes operable. In this state, the voltage discrimination circuit 1
4 is activated and the attached functional circuit 5 is activated, however, in this embodiment, the voltage discrimination circuit 14 still does not operate at the above-mentioned constant voltage, and the attached functional circuit 15 remains inoperative. in a state.

When the switch S is turned on, another predetermined constant voltage is output from the control voltage generation circuit 20, and the voltage discrimination circuit 14 is operated by the constant voltage, and the auxiliary function circuit 15 is put into an operating state. Therefore, if an answering machine, a speaker horn, or the like is used as the auxiliary functional circuit 15, these devices and horns become operational when the switch S is turned on.

FIG. 3 is a specific electrical wiring diagram of the main parts of another embodiment, and in the figure, TR, TR2, R, ~R4, D5° and D6 are transistors and resistors that constitute the control voltage generation circuit, respectively. , diode, Fs is a hook switch.

S is a switch, DI is a dial switch, Ds is a dial shunt switch that shunts the communication circuit]8 while the dial switch Di is in operation, TR3~TR, 7,R,~
R1□ and 23 are a transistor, a resistor, and a NAND circuit, respectively, which constitute a voltage discrimination circuit.

24 is a speaker horn circuit as an attached functional circuit.

25 is a bidirectional switch circuit controlled by the output of the NOR circuit 23, and 26 is a speaker that also serves as a microphone.

In the embodiment shown in FIG. 3, when the hook switch Fs is turned on, the transistor TR is turned on, and a predetermined voltage is applied to the telephone call circuit 18 via the transistor TR2 and the hook switch Fs, so that the telephone call circuit 18 becomes operational. . In this state, the potential at the connection point between resistor R4 and diode D is relatively low, so both transistors TR3 and TR6 are in an off state. Therefore, the inputs of the NAND circuit 23 are both at the NO level and the bidirectional switch circuit 25 is in the OFF state. In this state, the transistor TI (, is in the off state,
Since the collector potential is at Vinebell, the transistors TR, , TR, are off, the transistor TR7 is off, and the speaker horn circuit 24 is also off.

Next, the case where the switch S is turned on will be explained. When the switch S is turned on, the transistors TR, are turned on in the same way as when the hook switch Fs is turned on.

TR2 turns on, but in this case, Funkusuinochi Fs
is off, and the communication circuit 18 remains off. In this case, resistor R4 and diode D,
The potential at the connection point becomes relatively high, and both transistors TR, 3, TR, , turn on.

Therefore, both inputs of the NAND circuit 23 become low level, a high level signal is applied to the bidirectional switch circuit 25, and the bidirectional switch circuit 25 is turned on. At the same time, transistor TR4 is turned on, transistors TR6 and TR are turned on, a predetermined voltage is applied to speaker horn circuit 24 through transistor TR, and speaker horn circuit 24 is brought into operation.

In this way, according to the above embodiment, the telephone call circuit 18 provided in the handset 16 and the speaker horn circuit 24 provided in the telephone body 11 are activated when the hook switch Fs is turned off and when the separately provided switch S is turned on. It has the advantage that it can be switched and used separately and can be easily operated by the switches Fs and S provided on the handset 16 side.

In the above embodiment, when the dial switch D1 is turned on and off, the transistors TR, TR2 are turned on and off at the same time, and the communication circuit 18. Speaker horn circuit 2
Noises caused by turning on and off the transistors TR and TR2 are input to the circuit 4, but these can be easily eliminated by partially changing the connection position of the dial shunt switch Ds and other circuit connections.

According to the invention, different predetermined control voltages are output from the control voltage generation circuit by turning on and off a switch provided on the handset side, and a circuit for discriminating the control voltages on the phone body side is provided. The output of this circuit turns on the attached function circuit installed on the phone main body side.
It is configured to perform off control, and the call circuit and attached function circuit are provided separately on the handset side and the telephone body side, respectively, and can be used as a hook switch.

Since both switches are provided on the handset side, there is an advantage that the structure of the telephone main body can be relatively simple. In addition, by providing the switch on the terminal side, there is no need for space for it on the phone main body side, which has the advantage of reducing the overall size of the phone main body and greatly improving operability. have

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of a conventional telephone, Fig. 2 is a schematic diagram of an embodiment of the telephone according to the present invention, and Fig. 3 is a specific electrical wiring diagram of main parts of another embodiment. . 11...Telephone body, 12...Incoming call detection display circuit,
13. Rectifier circuit, 14. Voltage discrimination circuit, 15. Attached function circuit, 16. Handset, 17. Cord, 18.
Call circuit, 19...Dial circuit, 20...Control voltage generation circuit, 21...Telephone, 22. Receiver, 23.NAND circuit, 24.Speaker horn circuit, 25.Two-way switch circuit, 26.Speaker.

Claims (1)

[Claims] A dial circuit, a call circuit, and a control voltage generation circuit are provided on the handset side, and a hook switch and a switch provided on the handset side are configured to output different predetermined control voltages from each control voltage generation circuit, and the above control voltage is provided on the phone body side. A telephone characterized by being equipped with a voltage discrimination circuit that discriminates voltage and controls on/off an auxiliary functional circuit provided on the telephone main body side.