CN2036729U - Coin-operated telephone using the clearing signal of ringing return sound to collect the money - Google Patents

Abstract

The utility model provides a coin-operated telephone using the clearing signal of ringing return sound to collect the coin. The utility model is characterized in that the circuit of a coin collecting device comprises a signal extracting transformer (1), an electric voltage amplifying and amplitude limiting circuit (2), a frequency selecting, amplifying and rectifying circuit (3), a signal recognizing circuit (4), a period recognizing and coin pulse creating circuit (5), a coin collection control circuit (6), and a special-service recognizing circuit (7). Compared with an existing coin-operated telephone, the coin-operated telephone using the clearing signal of ringing return sound to collect the coin can be directly connected with the switchboard of any system. The utility model has the advantages of easy installation, convenient operation and reliable coin collection.

Description

Coin-operated telephone using the clearing signal of ringing return sound to collect the money

The utility model belongs to telephone set and receives the coin technology, particularly about a kind of coin-box telephone set that utilizes the ring-back tone termination signal to receive coin.

Present coin-box telephone set is that the polarity reversing signal that utilizes switch to provide is received coin.But the crossbar switch of the existing use of China does not possess the reversed polarity function, and the step-up exchange overwhelming majority does not possess this function yet.Use coin-box telephone set, just must reequip, not only bother time-consumingly, but also will increase customer investment all cord circuits (generally per thousand have 120-150 bar cord circuit) of switch.

Task of the present utility model is exactly a kind of novel coin-box telephone set of development, can be whenever and wherever possible connects use with the switchboard direct of any standard, has the existing above-mentioned shortcoming of coin-box telephone set now thereby overcome.

When making a phone call, when phone was put through, before the off-hook, the calling party can not hear a kind of ring-back tone to the callee in headset earpiece.Ring-back tone is the signal that a kind of any system switch can both provide, and be 5 seconds its normal period, and frequency is 450 ± 25HZ.

The utility model technique of choice scheme is the original structure that does not change the phone part, redesigns a kind of receipts coin device.This receipts coin device is that the ring-back tone termination signal of utilizing switch to provide is received coin.This receipts coin device at first extracts ringing tone signal by certain circuit, it is transformed at last again and receives the coin signal; Obey the free regulation of phone at the spy, designed special clothes phone identification circuit in this receipts coin device.

Further introduce the technical solution of the utility model and architectural feature thereof below in conjunction with accompanying drawing and example.

Fig. 1 represents structural principle block diagram of the present utility model;

Fig. 2 represents a representative instance circuit of the utility model receipts coin device.

With reference to Fig. 1, the dotted line left side is the phone part, W ₁, W ₂Connect subscribers feeder.In the phone square frame, comprise the original structure of phone, as the opto-electronic conversion controlling organization of existing phone, speaking circuit, alert mechanism etc. in limited time.

The circuit of coin device is received on dotted line the right for the utility model.Comprise 1, the signal extraction transformer, 2, the voltage amplification amplitude limiter circuit, 3, frequency-selecting amplifies rectification circuit, 4, signal recognition circuit, 5, cycle identification produces circuit with coin pulse, 6, receive the coin control circuit, 7, part such as special clothes phone identification circuit.

With reference to Fig. 2, this figure provides the utility model to receive a representative instance circuit of coin device.Receive the circuit composition of coin device by the description of each partial circuit further being introduced the utility model.

1, the circuit of these receipts coin device utilizes B ₁As extracting signal transformer.Its elementary two groups of umber of turns equate, form an anti-side-tone circuit with element in the phone, and elementary opposite end attenuation 〉=20dB can suppress the caller speech effectively and enter the circuit interference; When ringing tone signal send into by phone elementary after, the signal voltage about 7mV of secondary output.

2, this circuit utilizes T ₁, T ₂, D ₂, D ₄Constitute the voltage amplification amplitude limiter circuit Deng main element.Cause is from B ₁The signal voltage that extracts is less, can not be used for controlling the connection that slot machine is received coin and talking path, for this this circuit utilizes triode T ₁, T ₂Carry out the two-stage voltage amplification earlier, about 100 times; Signal after process is amplified is again by diode D ₂, D ₄Carry out amplitude limit, the fixed ampllitude signal of output 600mV.

3, this circuit utilizes T ₂, B ₂, D ₅, D ₆, C ₁₁, C ₁₂Main element constitutes frequency-selecting and amplifies rectification circuit.Its task is by T ₂, B ₂Select 450 ± 25HZ signal Deng the frequency selective amplifier of forming, and through D ₅, D ₆Deng voltage multiplying rectifier output, to start the next stage circuit.

4, this circuit utilizes T ₄, T ₅, C ₁₃Deng main element, constitute signal recognition circuit.Here the signal that continues deficiency of time 180ms is considered as interference signal, the duration is surpassed 180ms and can make C ₁₃The signal that last charging voltage is set up is considered as using signal.Adopt this signal recognition circuit the interference signal filtering, need are identified with signal, make it enter the next stage circuit.C ₁₃Be signal identification electric capacity.

By T ₄, T ₅And resistive element is formed an emitter-coupled trigger.When sending 450 ± 25HZ ringing tone signal, T ₅End T ₄Conducting; When stopping to send 450 ± 25HZ ringing tone signal, T ₄End T ₅Conducting.Therefore send ring signal (the at this moment called ring situation that is in) at switch back to coin-box set, at T ₅Collector electrode output be a series of square-wave signal, promptly ringing tone signal is become the cycle identification circuit that square-wave signal is sent into next stage.

5, this circuit utilizes YF ₁, YF ₂, YF ₃, F ₁, F ₂, F ₃, F ₄, C ₁₄, R ₁₉Deng identification of element formation cycle and receipts coin signal generating circuit.R wherein ₁₉, C ₁₄Be cycle recognition component, YF ₂, YF ₃Be shaping element.It is 5S that ring-back tone send the disconnected cycle, it is 0.7s that busy tone send the disconnected cycle, dialing tone is the continuous signal sound, according to cycle difference between the three, ring-back tone from busy tone, is identified in the dialing sound, and form the coin pulse signal when utilizing ring-back tone to stop, thereby avoid sending into the dialing sound effectively, the busy tone mistiming is received the coin phenomenon.

Because C ₁₄The effect that discharges and recharges, make the front and back of coin pulse signal that width is about 180ms along undesirable, therefore need be through YF ₂, YF ₃After this signal shaping, restart next stage and receive the coin circuit.CH ₂, CH ₃For fork spring contact, connect during press, make CH ₁₄The rapid discharge off of last voltage.

6, this circuit utilizes F ₅, F ₆, T ₆, J, D ₁₀, D ₁₁, D ₁₈Constitute receipts coin control circuit Deng element.For the back mistake of avoiding inserting coins is received coin, this receipts coin circuit design is for being subjected to coin-in signal simultaneously, allowing receipts coin signal and coin pulse signal controlling, promptly have only when these three kinds of signals be high level simultaneously, deliver to D respectively ₁₁, D ₁₈, D ₁₉Negative pole the time, T ₆Just conducting, the adhesive of relay J ability is opened and is received coin door receipts coin.

In order to guarantee to receive again coin, D ₁₅After receiving coin, play clamping action, make to be added to R after receiving coin ₂₅On high potential because of D ₁₅Conducting can not arrive IC ₁Clear terminal R, IC ₁Can zero clearing.Give IC ₁Reset signal has two kinds: the one, and the off-hook reset signal, promptly high potential passes through R behind the off-hook ₂₅, D ₁₃Give IC ₁Zero clearing; Another is to press fork spring reset signal, and promptly the user is when pressing the fork spring, and high potential passes through R ₂₆, D ₁₄Give IC ₁Zero clearing.The purpose that these two kinds of reset signals are set is when the user throws sufficient coin, no matter whether the user stirs dialer before this, all will give IC ₁Zero clearing so that dialing the time is counted again, avoids mistake to receive coin.

7, this circuit utilizes CH ₁, CH ₂, BH ₁, BH ₂, IC ₁, F ₈, YF ₄Constitute special clothes phone identification circuit Deng element.CH wherein ₁, CH ₂Be fork spring normally closed contact, BH ₁BH ₂Be dialer shunt contact, IC ₁Be 7 grades of serial binary counters, ∮ is a counting input end, and R is a clear terminal, Q ₃, Q ₄Output.Existing coin-box telephone set is obeyed phone to the spy and is not received coin and realized by the switch control anti-polar signal of not bothering to see me out.And coin-box telephone set of the present utility model, as long as phone puts through, callee's off-hook, ring-back tone stop, and just receive coin, thereby obey phone for the spy and do not receive the coin switch and be difficult to control, so have designed special clothes phone identification circuit in the utility model again.

City regular phone number is more than the four figures, and special clothes telephone number is below three figure places, and this spy obeys identification circuit and adopts count pulse identification dialing figure place.Count pulse is by BH ₁, BH ₂One group of dial shunt contact produces, and dial is whenever stirred and once just produced a pulse, sends into counter IC ₁∮ end counting.When the pulse that regulation produces when dialing in the design is no more than three, Q ₃End does not produce the coin pulse signal for electronegative potential, does not receive coin; In case reach four when above, Q when the dialing figure place surpasses three ₃End output high potential promptly is to allow to receive the coin signal, passes through F ₈, YF ₄Send into D ₁₆Negative pole, by BH ₁, BH ₂Produce the coin pulse signal, receive coin circuit receipts coin thereby start.For abundant surplus is arranged, introduce Q ₄Output can make the dialing figure place reach 16.

This coin-box telephone set of the present utility model, connect with the switchboard direct of any standard, through hundreds of time conversation experiments, all callees of putting through reply all accomplishes to receive coin, not all not putting through (busy tone) or put through that the callee do not connect, all do not receive coin, receiving the coin accuracy rate is 100%, compares with existing coin-box telephone set, have and install easily, easy to use, receive the advantages such as coin is reliable, be the desirable coin-box telephone set of a kind of novelty.

Claims (2)

1, a kind of coin-box telephone set has the original structure of phone and receives part such as coin device, and the circuit that it is characterized in that this receipts coin device is the circuit that a kind of ring-back tone termination signal of utilizing switch to provide is received coin, mainly comprises:

(1) signal extraction transformer;

(2) voltage amplification amplitude limiter circuit;

(3) rectification circuit is amplified in frequency-selecting;

(4) signal recognition circuit;

(5) cycle identification produces circuit with coin pulse;

(6) receive the coin control circuit;

(7) spy obeys phone identification circuit etc.

2, coin-box telephone set as claimed in claim 1 is characterized in that said (1) signal extraction transformer, is the transformer B that elementary two groups of umber of turns equate ₁, it and the interior element of phone are formed an anti-side-tone circuit; (2) voltage amplification amplitude limiter circuit is by T ₁, T ₂, D ₃, D ₄Form Deng main element; (3) rectification circuit is amplified in frequency-selecting, is by T ₂, T ₂, D ₅, D ₆, C ₁₁, C ₁₂Form Deng main element; (4) signal recognition circuit is by T ₄, T ₅, C ₁₂Form Deng main element; (5) cycle identification and receipts coin signal generating circuit are by YF ₁-YF ₂, F ₁-F ₄, C ₁₄R ₁₉Form Deng main element; (6) receiving the coin control circuit, is by F ₅, F ₆, T ₆, J, D ₁₀, D ₁₁, D ₁₅Form Deng main element; For guaranteeing that continuing conversation receives coin again, this electricity has been provided with the D of clamping action again ₁₅, make to be added to R after receiving coin ₂₅On high potential, because of D ₁₅Conducting can not reach IC ₁Clear terminal R; For zero clearing and avoid the mistake receive coin, this circuit high potential behind off-hook can pass through R ₂₅, D ₁₃Arrive IC ₁Clear terminal R or press the fork spring after high potential can pass through R ₂₆, D ₁₄Arrive IC ₁Clear terminal R; (7) special clothes phone identification circuit is by CH ₁, CH ₂, BH ₁, BH ₂, IC ₁, F ₈, YF ₄Form Deng element, it is by by BH ₁, BH ₂The count pulse that one group of dial shunt contact produces is discerned the dialing figure place, thereby realizes that the spy is obeyed phone does not receive coin.

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