JPS6338363A - Doorphone device - Google Patents

Abstract

PURPOSE:To form a doorphone device which can be easily connected a remote side and excels in the talking performance by providing an amplifier for received sound volume at the doorphone side together with a battery that can charge the power supply needed for a talking function. CONSTITUTION:When channel selection switches S1 and S2 are pushed and a handset is picked up through a remote side device (master device), a transistor TR2 is turned on via a route of a BAT a terminal L2- the S2 a transmitter microphone M1 a hybrid transformer HC1 the S1 a terminal L1 a diode D2 a resistance R2 the TR2 the BAT. Thus the power is supplied to an amplifier Amp and a microphone M2 and therefore the voices received from the microphone M1 are supplied to both terminals L1 and L2 through the HC1 and amplified by the amplifier Amp via a hybrid transformer HC2 to be loudly broadcasted through a telephone receiver RC2. The voice of the M1 is also heard through the RC1, therefore, the HC1 is provided to minimize the voice as small as possible.

Description

[Detailed description of the invention] Industrial applications Unreleased rv+ relates to a doorbell device used at home.

f5Y East's technology Conventionally, this type of device uses a power source sent from the other party as shown in Figure 1, and the other party now has an amplifier to amplify the received sound. ing.

While the invention is trying to solve the problem, the current device has a structure in which the other side has the functions of power supply and amplification, so +i
If the IT side is '<Pl', it becomes complicated, and the connection with the home phone is most likely to be made as a device on the side.
There was a time when the problem was very difficult to solve.

The present invention solves the problems of the prior art, and it is an object of the present invention to provide a door intercom device that facilitates connection with the other party and has excellent communication performance.

Means for Solving the Problems In order to achieve the object [0], the present invention provides an amplifier for amplifying the reception sound (7F) of the doorphone on the doorphone side, and a means for supplying power to the amplifier. It has a rechargeable battery, and even when the other party calls from a home phone, the doorbell amplifies the sound on the doorbell side, making it possible to make amplified calls inside the cylinder.In addition, the rechargeable battery can be charged and operated repeatedly. In this example, solar cells may be used on the doorbell side as a means to withstand this, or it is natural that the other party's solar cell may be supplied as a medium. There is a 4-wire → 2-wire conversion circuit that allows simultaneous calls on the line (('l:!T) as IIf.

(If the action iY-1 is not issued and 11J-1 is not followed, the other party will be sent.)
7) Even if a call is made using a bell, the doorbell side has the effect that simultaneous calls can be made by amplification.

Embodiment FIG. 2 shows the configuration of an embodiment of the present invention. In FIG. 2, T and R are terminals connected to a telephone line, C1 is a capacitor for blocking direct current, and ■ is a bell. In a normal telephone line, an alternating current with a frequency of 16 Hz and a voltage of about 70 V is used as a calling signal, which causes a bell to ring.

R51 and R52 are hook switches, and the illustrated state indicates standby. SL and SP are used for IQ to select a telephone line or a doorbell with a channel selection switch.

HCl is for 2-wire to 4-wire conversion... Hybrid transformer, R
Cl is a receiver, Ml is a transmitter, and C2 is a DC blocking capacitor, and these constitute the telephone communication circuit. I) 1 is a Zener diode for voltage discrimination, R
1 is a current adjustment resistor, Trl is a transistor that controls the power supply to the oscillator oSC, SP is a speaker,
A call from the doorbell is detected and an oscillating sound is generated via the oscillator OSC.

Ll, L2 are connection terminals f for doorphone, HC2 is 2-wire →
Transformer for 4-wire conversion, C3 is DC blocking converter V
, R3 is an impedance matching resistor, RC2 is a receiver, Amp is an amplifier, and M2 is a transmitter, which constitutes a communication circuit to the door phone.

D2 is a diode for voltage discrimination, R2 is a resistor for current adjustment, and Tr2 is a transistor for controlling power supply to the communication circuit. AT indicates a rechargeable battery, and ■ indicates a solar battery.
I'm here. Cs is a call switch for calling the other party's device.

Next, the operation of the above embodiment will be explained. When you press the call switch Cs, BATC5-FLl->Dl
Current flows through the path of r1 and transistor Tr1 turns on, which causes 8AT→L2->Trl >oSC→L
Power is supplied to the oscillator OSC through the path 1-iCs-iBAT, causing the speaker sp to sound. When you press the channel selection switch 51 or 52 on the other party's device (called the base device) and pick up the handset, BAT, L2, SP, M1 →
HC1→S1→L1->D2) R2 play Tr2 is turned on in the path of Tr2→BAT, amplifier Amp and microphone M2
supply power to the As a result, the audio from the microphone M1 is passed through the hybrid transformer HC1 to 11. The signal is supplied to L2, is amplified by the amplifier Amρ by the hybrid transformer HC2, and is amplified by the receiver RC2. Furthermore, M
The HCl is provided so that the voice of 1 can be heard through the RCl, but it is as quiet as possible. Also, the voice from the transmitter M2 is transmitted to Ll and L through the hybrid transformer HC2.
2 and sounds the receiving SRCI via HC1. The sound from the transmitter M2 leaks to the amplifier, but due to impedance matching by R3, the sound M is...
It is kept as small as possible so as not to cause ringing.

When the JIFI conversation ends, the handset is returned to the standby state by returning the handset and the tuning switch.

In addition, if the handset is turned off without pressing the channel selection switch S1, 52,
-Gerto T1→H91★S1 〉HC1→M1→S2→
) A call is established with the telephone line via the route 1s2・R.

The rechargeable battery SAT is designed to be constantly charged by the solar type a[F] and to withstand repeated operations.

Effects of the Invention As is clear from the above embodiments, the present invention has a receiver sound amplification amplifier and a rechargeable battery for supplying power to the amplifier on the doorbell side, thereby simplifying the device and making it possible to exhibit excellent performance. Because of this structure, it has the advantage that it can be easily connected to telephones used in ordinary homes.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic circuit diagram of a conventional door intercom device. FIG. 2 is a circuit diagram of a main part in one embodiment of the present invention. T, R...Telephone line connection terminal, ■ Bell, R51,
R52 Hook switch, 51.52... Tuning switch, C5... Calling switch, HCl. HO2, hybrid transformer, RCl, RC2 receiver, Ml, M2, transmitter, C1, C2, C3 condenser, R1, R2, R3...resistance, DI. D2...Diode, Trl, Tr2 ・Transistor, OSC-1 oscillator, SP ・Speaker, A
mp... Amplifier, BAT... Rechargeable battery, ■... Solar battery.

Claims (1)

[Claims] A door intercom device characterized by being equipped with an amplifier for amplifying the volume of a received call on the door intercom side, and a rechargeable battery as a power source necessary for the call function.