CN2085583U - Practical intercom and telephone expander - Google Patents

Abstract

The utility model relates to a practical intercom and telephone expander, comprising a handset, a phone holder, a unidirectional control stand, and each user sub-end. The utility model can match either telephone. The practical intercom and telephone expander can realize telephone transferring, conversations among interior sub-ends, and conversations between a sub-end and a control stand. The practical intercom and telephone expander can be used for inhabitant households of a moderate storey, collective dormitories, and various office buildings to take the function of one household or one chamber with one telephone. The conversion circuit of the practical intercom and telephone expander can be used for the management of a scene. The utility model has the advantages of simple structure, easy installation, low cost, and far transfer distance. The practical intercom and telephone expander provides a good method for solving the difficulty of telephoning in inhabitant buildings or collective dormitories.

Description

Practical intercom and telephone expander

The utility model is the novel machine that integrates wired intercom and phone expanded function, has cost characteristics low, easy to use.Can be used for dormitory or residential building building, solve the difficult problem of making a phone call.

The dormitory of general unit has only a phone to be installed on night shift room usually, and (the internal institution extension set or the phone that directly is incorporated into the power networks) will make a phone call, and obtains night shift room and goes.Come if any phone, notify from a phone call the people and wait for that the time of coming understand not only grows but also bother two problems with regard to existence.Notifying from a phone call the people generally has loudspeaker to notify from a phone call and two kinds of wired intercoms, answers a call but the people who answers the call still need arrive night shift room.Phone is also very difficult for the moment to be solved and resident family or dormitory will generally be loaded onto.The one, Telecom Facilities does not catch up with, and the 2nd, even call capacity is enough, funds are also considerable.The user adorns a phone and wants thousands of units, and unit will adorn an exchange and generally want hundreds of thousands unit.

This machine is incorporated into one to wired intercom and phone expanded function dexterously, has saved electric bell and the dial system in the subscriber phone, has saved various expenses greatly (about 100 yuan of control desk costs; Divide about 12 yuan of end costs), and general personnel all can operate.

This machine can be complementary with arbitrary phone (exchange and completely restricted extension all can), realize forward call and between the part end and divide conversation between end and the control desk, can be used for medium floor resident family, dormitory and various office block, play the effect of one Room, a family, one phone.Its talkback circuit also can be used for field management, and in addition, each minute held the doorbell effect that has concurrently.Only need during this machine of installation the microphone of telephone set and support are separated, the corresponding junction block that then its terminals is connected to control desk respectively gets final product.Multicircuit switch is equipped with in control desk inside, has realized dexterously finishing conversion from the intercommunication state to call forwarding with a multi-joint button.And have transmission distance (can reach more than 200 meters), the characteristics that tonequality is good, and can increase and decrease the number of intercommunication end according to actual needs.

This machine by with the control desk of closing of the circuit and each minute end form.Transformational relation between control desk intercommunication end, original call machine and the branch end as shown in Figure 1.Wherein 1 represents telephone receiver; 2 expression control desk intercommunication ends; 3 expression telephone holder; The unidirectional control desk of 4 expressions.M1, M2 ... Mn represents that respectively the user divides end.Specify as follows below in conjunction with accompanying drawing:

(1) control desk structure (see figure 2)

5 are used for amplifying control desk microphone output signal among Fig. 2, and 6 are used for amplifying the signal that user's microphone transmits.5,6 are made up of 1/2 dual track power amplifier piece TDA2822 respectively, and microphone signal amplifies usefulness during as wired intercom.Microphone and loudspeaker when S1 and Y1 are respectively the control desk intercommunication among the figure.W1, W2 are used for regulating volume; 7 are made of music-integrating block IJ9300.Add trigger switch K2-1, K2-2 and play the calling effect.1,3 is respectively telephone receiver and the support of connecting with control desk.8 is the volume indicating circuit that is made of TA7666 five terminal volume indication integrated package, plays the signal indication and decorates usefulness.The 4th, unidirectional control desk is used for signal is given to designated user.J1 in it, J2 to Jn is each user's a unidirectional control switch.4 output line is received user M1 respectively, on the incoming line of M2 to Mn.4 signal input line and user's output line join.

E is the 12V power supply among the figure.Can be No. 1 battery of 8 joints or 12V stabilized voltage power supply; L1 is the power supply indication; L2 is the end of conversation indication; L3 is the wait state indication; L4 is the conversation indication; K1 is a mains switch; K2 often drives button for calling out; K3 is a change over switch; K5 is a talk-listen switch between the inner intercommunication end.

(2) user structure: ［ seeing shown in Figure 3 ］

10 is ding-dong doorbell ic circuit (needing with No. 5 baby batteries of 2 joints) among Fig. 3.Its trigger end is received on user's door, and its output meets user side inside trumpet Y2.Can have the doorbell effect concurrently.The 9th, user's microphone and earphone are equivalent to telephone receiver.K4 is the stress normal open switch, is equivalent to telephone set stress switch.User's support is made up of the other parts except that 9 among Fig. 3.Indication that BG2, R7, R8, R9, L5 constitute that the line is busy.+ 3V voltage is provided by the doorbell battery.When a user talked, this lamp of other user was bright.

Three, set forth the course of work of striking machine below in conjunction with Fig. 2, Fig. 3.

(1) control desk calling party first

The unidirectional control switch of keeper's connecting subscribers participating first is pressed then and is not locked challenge switch K2-1 and K2-2.K2-2 makes doorbell call out integrated package and triggers, and K2-1 reaches K3-3 to the doorbell call signal, passes to the loudspeaker of user's first again through unidirectional control desk.User's first hangs on and can understand.

(2) control desk and user's communication

Behind the manager call user, can microphone S1 speech, the signal of telecommunication behind amplifying circuit TDA2822M to K2-1.Arrive the user through K3-3 again.The speech of user session tube reaches amplifying circuit through K3-4, again to 1 pronunciation of control desk loudspeaker Y.

(3) user and keeper conversation

Under wait state, the user hangs on, and sound can reach control desk through K3-4 and amplifying circuit.Inform keeper's number, the keeper puts through its single-way switch can realize intercommunication.

(4) user is in and answers the call

Outer phone reaches control desk, inform that the keeper wants calling user, the keeper puts through its single-way switch, press challenge switch, informed phone, the press-to-talk K switch 3 then, can realize answering the call (telephone signal through K3-2 to unidirectional control desk to the user, K3-2 disconnects the control desk microphone simultaneously, makes to audit).User's speech signals reaches the opposing party who makes a phone call through K3-1, and K3-4 disconnects the audible warning of control desk.Also can't hear the intercommunication signal in the loudspeaker.K3-4 connects the end of conversation indicating circuit simultaneously.Behind the end of conversation,, can make the end of conversation indicator light bright because the BG1 base potential raises.

(5) user please make a phone call in keeper's commentaries on classics

The user hangs on and keeper's conversation, informs the telephone number that the keeper will beat, and presses change over switch K3 after the keeper connects and gets final product.Behind the end of conversation, it is bright to finish indicator light, and the keeper opens talk-listen switch, gets back to wait state.

(6) converse between the inner intercommunication end

User's first hangs on, and informs that the keeper wants intercommunication user second and own number, and the keeper puts through user's second single-way switch, informs and wants INCOM intercom, puts through user's first single-way switch then, presses talk-listen switch between the inner intercommunication end of K5 again, can converse.

The speech signals of user's first through K3-4, TDA2822 amplifying circuit, K5-1, K3-3 to unidirectional control desk again to user's second earphone; The signal of user's second is through the earphone (during intercommunication oneself also can hear a bit oneself sound, but influence little) of same circuit to user's first.K5-2 disconnects the control desk microphone, prevents to disturb.Behind the end of conversation, 5 sections volume indications are extinguished, and the keeper gets back to wait state to switch.

7, all branch ends have the doorbell effect concurrently

The user divides is equipped with ding-dong doorbell integrated package in the end, its trigger end causes on user's door, divides end just can have the doorbell function concurrently.

8, indication that the line is busy

Conversing if any minute end: each minute holds busy lamp bright, and other divides end inconvenience use.

This striking machine has been installed in my physics laboratory, school and has used the several months, and effect is fine.

Claims (2)

1, one connects practical intercommunication and the phone striking machine that each user divides end by telephone receiver, telephone holder, unidirectional control desk and with change over switch, it is characterized in that forming two-way amplifying circuit with dual track power amplifier piece TDA2822 in the unidirectional control desk, music-integrating block ZJ9300 constitutes call circuit, TA7666 constitutes the volume indicating circuit, the output line of unidirectional control desk can join with user's incoming line by change over switch, and the signal input line of separate unit control desk also can join with user's output line by change over switch.

2, by practical intercommunication and phone striking machine that claim 1 determined, it is characterized in that R7, R8, R9, L5 constitute that the line is busy indicating circuit by BG2.

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