CN2185958Y

CN2185958Y - Intercom by using broadcasting line communication

Info

Publication number: CN2185958Y
Application number: CN 93234905
Authority: CN
Inventors: 刘应佳; 石金凯
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-10-26
Filing date: 1993-10-26
Publication date: 1994-12-21
Anticipated expiration: 2003-10-26

Abstract

The utility model relates to an intercom by using broadcasting line communication. A ringing circuit, a ringing identifying circuit, a microphone amplifying circuit, a sound receiving amplifying circuit and a current limiting voltage stabilizing circuit are arranged in an intercom to realize the goal of mutual calling and conversation by a broadcasting line. The utility model has the advantages of simple structure, stable performance and lamprophony of conversation; one broadcasting line can be hung with three intercoms simultaneously; various difficulties of conversation by the broadcasting line can be effectively solved. When a repeater station is provided and pluralities of broadcasting lines are provided, the mutual conversation among more users can be realized.

Description

Intercom by using broadcasting line communication

The utility model relates to an intercom, and refering in particular to is a kind of intercom that utilizes the program circuit conversation.

The area of China's rural area realization villageization also seldom, distance between family and the family is general all more than 1000 meters, contact each other is very inconvenient, in the nearly stage, it is also unrealistic to popularize rural telephone system, but, rural wired broadcast network is but very universal, how to utilize this existing resource exploitation rural area communication system, really once the someone attempts utilizing rural wired broadcast network to converse, but because device structure is too complicated, unstable properties, communication effect is not good, and equipment manufacturing cost is too high former thereby can't apply.

The purpose of this utility model be to overcome the deficiency of prior art and provide a kind of simple in structure, stable performance, call voice clear, can be on a broadcast wire intercom that utilizes the program circuit conversation of 3 intercoms of lodge simultaneously.

The utility model is to adopt following proposal to realize: ringing circuit is set in intercom, and ringing identification circuit send words side big circuit, is talked about amplifying circuit, and the current limliting voltage stabilizing circuit is to realize utilizing the purpose of the mutual call conversation of program circuit.

Concrete structure of the present utility model describes in detail below in conjunction with accompanying drawing.

Accompanying drawing 1 is a kind of electrical schematic diagram of the present utility model.

Accompanying drawing 2 is another electrical schematic diagram of the utility model ringing identification circuit.

Accompanying drawing 3 is the another kind of electrical schematic diagram of the utility model ringing identification circuit.

Referring to accompanying drawing 1, the utility model is by ringing circuit 1, ringing identification circuit 2, current limliting voltage stabilizing circuit 3, send words amplifying circuit 4, being talked about amplifying circuit 5 forms, described ringing circuit 1 is by K switch 2, K3 forms, ringing identification circuit 2 is by switch hook K1, resistance R 12, capacitor C 9, inductance T4, diode VD4, electric bell LD forms, current limliting voltage stabilizing circuit 3 is by capacitor C 0, C6--C8, resistance R 9-R11, transformer T2, diode VD5, VD6 forms, send words amplifying circuit 4 by transformer T1, resistance R 1--R7, potentiometer W1, capacitor C 1--C5, triode BG1--BG3, transmitter S forms, and is talked about amplifying circuit 5 by potentiometer W2, capacitor C 10, resistance R 14--R18, triode BG4, BG5, receiver HS forms.

Referring to accompanying drawing 2, the utility model ringing identification circuit 2 is by switch hook K1, resistance R 12, and inductance T4, capacitor C 9, electric bell LD, diode VD7 forms.

Referring to accompanying drawing 3, the utility model ringing identification circuit 2 is by switch hook K1, resistance R 12, and inductance T5, capacitor C 15, electric bell LD forms.

K switch 1 in the utility model ringing circuit 1, the bell signal that K2 exported are any one signal in direct current forward voltage, direct current reverse voltage or the alternating voltage, therefore, three kinds of ringing identification circuits 2 are set simultaneously, with the signal of this machine of identification External Call, the machine that guarantees only can receive a kind of bell signal.

Operation principle of the present utility model is sketched in following: during when this machine of External Call, bell signal is through 4, the 6 contacts input of switch hook K1, make this power ringing, mention receiver, 2,4 contacts of switch hook K1 are connected, and outside line and transformer T2 are connected, after current-limiting resistance R9 current limliting, draw signal from the centre cap d of transformer T2, this signal is limited to voltage about 0.6 volt and inputs to potentiometer W2 through diode VD5, VD6, is amplified into receiver HS through triode BG4/BG5; When this machine to sending when words outside, the audio signal of being sent by transmitter S after triode BG1--BG3 boosts, exports the outside line earphone to through transformer T2 coupling and through 2,4 contacts of switch hook after transformer T1 boosts.When calling out outside line, only need any among push switch K2, the K3, can call out the extension set of the bell signal corresponding with K2, K3.

The utility model can guarantee when program circuit is worked that owing to designed current-limiting resistance R9 even this machine is connected with outside line, broadcast singal also mainly consumes on resistance R 9, unlikely this machine part that burns out.Send words to have in the amplifying circuit in adopting potentiometer, resistance that audio signal is regulated, make its output signal not influence user's loudspeaker and this machine receiver sound is clear, this output signal is controlled at below 0.3 volt; The effect of capacitor C 6 is to cut off the forward and reverse bell signal of direct current, avoids burning out this machine part; The effect of inductance T4 is to control broadcast singal, avoids burning out this machine part.

The utility model adopts said structure, can solve all difficulties that utilize the program circuit conversation effectively, and can be implemented in the purpose of 3 intercoms of lodge on the broadcast wire, if intermediate station of configuration, the several broadcast wire is set, just can realizes communicating with each other of more users.

In sum, the utility model is simple in structure, dependable performance, sound clarity, simple to operate, small investment, is the communication tool that a kind of suitable China rural area is popularized.

Claims

1, a kind of intercom that utilizes the program circuit conversation, comprise ringing circuit 1, ringing identification circuit 2, current limliting voltage stabilizing circuit 3, send words amplifying circuit 4, talked about amplifying circuit 5, it is characterized in that ringing circuit 1 is by K switch 2, K3 forms, ringing identification circuit 2 is by adopted spring K switch 1, resistance R 12, capacitor C 9, inductance T4, diode VD4, electric bell LD forms, current limliting voltage stabilizing circuit 3 is by capacitor C 0, C6--C8, resistance R 9--R11, transformer T2, diode VD5, VD6 forms, send words amplifying circuit 4 by transformer T1, resistance R 1-R7, potentiometer W1, capacitor C 1--C5, triode BG1--BG3, transmitter S forms, and is talked about amplifying circuit 5 by potentiometer W2, capacitor C 10, resistance R 14--R18, triode BG4, BG5, receiver HS forms.

2, a kind of intercom that utilizes the program circuit conversation according to claim 1 is characterized in that ringing identification circuit 2 by switch hook K1, resistance R 12, and inductance T4, capacitor C 9, electric bell I, D, diode VD7 forms.

3, a kind of intercom that utilizes the program circuit conversation according to claim 1 is characterized in that ringing identification circuit 2 by switch hook K1, resistance R 12, and inductance T5, capacitor C 15, electric bell LD forms.