JPH0626398B2 - Public telephone - Google Patents

Description

TECHNICAL FIELD The present invention relates to a public telephone that can cope with a charge for directory assistance.

[Conventional technology]

A conventional public telephone has a charge unit of 10 yen, for example, 1
If you insert one 0 yen and dial the number guide (114), a call loop is formed and you can talk with the exchange.

[Problems to be Solved by the Invention]

However, it has been pointed out that the problems that cannot be solved by the conventional public telephones will be accompanied by the charge for the number guidance in the future. That is, when the caller uses the directory assistance, if the call charge is 10 yen, there is no problem as before, but if the call charge is 10 yen or more, it is determined whether it is a general call or number guide until dialed. However, it is necessary to put in at least 10 yen to form a call loop and enable dialing. That is, in the case of a conventional public telephone in which the dial number is not identified, when dialing for number guidance, all dial signals are sent out and the operator responds. In this case, the call can be made by the response of the switcher, but at this point the switcher does not know how much the call charge has been put in, so a billing signal for storing the call charge of the directory guidance is sent out. I can't judge whether it's good or not. For this reason, for example, if a billing signal is sent from the exchange side when coins with an amount less than a predetermined amount (number guidance charge) have been inserted, the line will be forcibly opened during the call, and In addition to being unable to meet the demands, the call charges that were thrown in are not returned, resulting in a great deal of damage to the user.

[Means for Solving the Problems]

The public telephone according to the present invention includes a detecting means for detecting that a predetermined amount of coins has been inserted and accumulated, a dial number transmitting means for automatically transmitting a preset dial number for number guidance after the detection, and a dial number for this dial. After the number is sent out, an additional device is provided which is provided with a call loop forming means for forming the call loop and a charge storing means for storing the inserted coins according to a charge signal.

[Action]

When the addition device detects that a predetermined amount of coins has been inserted, a call loop is formed, a preset number guidance dial number is automatically transmitted, and the inserted coins are stored by a billing signal.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a schematic diagram of a coin storage unit according to the present invention. In the figure,
3a is a detection position of a photocoupler for detecting that five coins 21 have been inserted and accumulated, 22 is an oblique path for rolling the coins 21, 23 is a storage lever, and 24 is a return lever.

Further, FIG. 3 is a sectional view of the photo-cutting plastic of the coin accumulating portion in FIG. In the figure, 3b is a photocoupler light emitting portion, 3c is a photocoupler light receiving portion, and 22a is a coin 21.
Is the passage through which

By the way, after the off hook, the coin 21 inserted from the not-shown insertion port rolls in the oblique path 22 and moves to the storage lever 23,
It pushes against the return lever 24 and is sequentially accumulated and held. Then, when the fifth coin is inserted, the light from the light emitting portion 3b of the photocoupler is continuously blocked by the coin, so that the light does not reach the light receiving portion 3c for a predetermined time or longer. This allows
It is possible to judge that a predetermined amount (50 yen) of coins has been inserted. It should be noted that even if the coin 21 simply rolls on the oblique path 22 and passes the detection position 3a to block the light, it is not judged that the fifth coin has been inserted. Further, coins 21 are dropped and stored one by one in accordance with the storing operation of the storage lever 23 in response to the arrival of the charging signal, as shown by the arrow B, in a storage safe (not shown). On the other hand, if an on-hook operation is performed in response to the end of the call, the return lever 24 operates, and if there is a residual coin, it drops in the direction of arrow A and is discharged to a return port (not shown).

Next, FIG. 1 is a circuit diagram of a public telephone showing a first embodiment according to the present invention. In the figure, L ₁ and L ₂ are line terminals to which a telephone line is connected, HS ₁ , HS ₂ and HS ₃ are fax switches, CCL is a coin detection contact that is turned on when coins are inserted and accumulated, and Di is a dial. pulse contact, D1 to D8 diode, ZD is a Zener _diode, C 1 -C ₃ capacitors, B Bell, M is self-holding type relay using a permanent magnet or the like, m ₁ ~m ₃ is the contact of the relay M , Ds is a dial short-circuit contact, T is a transformer,
R ₁ and R ₂ are resistors, and N ₁ is a logic gate. Also, 1
Is a power supply circuit of a public telephone device, 2 is a call circuit, 3 is a photocoupler for detecting coins having the light emitting part 3b and the light receiving part 3c shown in FIG. 3, 4 is a control circuit, and 5 is a line terminal via a transformer T. It is an oscillation circuit connected between L ₂ and the cathode of the diode D 4.

Next, the operation of the public telephone will be described. 5 here
A case of directory assistance requiring a call charge of 0 yen will be described. First, if the caller goes off hook
_{When 1} , HS ₂ and HS ₃ are switched, and then a coin is inserted, the coin detection contact CCL is also turned on and a DC loop is formed. Since the DC voltage from the station side line terminal L ₁ as a positive electrode is applied, the line terminals L ₁ - Futsukusuitsuchi HS ₁ - diode D5- coin detection contact CCL- power supply circuit via the pulse contact Di- diode D1 dial 1 is supplied with a DC voltage. At this time, a voltage of about 6 V is generated in the Zener diode ZD of the power supply circuit 1, and this voltage is charged in the capacitors C ₂ and C ₃ via the diodes D7 and D8 and supplied to the control circuit 4 and the oscillation circuit 5 as a power source. To be done.
Next, the control circuit 4 starts operating when power is supplied,
Check the output signal of the photo coupler 3 and confirm the fifth coin (5
It is determined whether or not (0 yen) has been input. Here, when the fifth coin is inserted as described with reference to FIG. 2, the light sent from the light emitting section 3b to the light receiving section 3c is continuously blocked by the coin 21, so that the control circuit 4 is instructed. The “H” signal is input via the resistor R ₂ . When this signal is input, the control circuit 4 confirms that a predetermined amount of coins have been inserted, and the oscillating circuit 5 allows the tone and volume (for example, an intermittent tone of 400 Hz) through the transformer T to such an extent that the telephone call is not hindered. ) Coin detection signal is sent to the exchange side. Next, when the caller performs dialing guidance for number guidance, the pulse contact Di repeatedly turns on and off, while the short-circuit contact Ds of the dial maintains the on state and a dial pulse is sent out. The exchange responds to this and the exchange responds. Normally, the line is not poled when the switch responds, so the switch can confirm the coin detection signal and determine that the call charge of a predetermined amount has been inserted. As a result, the operator sends a billing signal to store 5 coins and stores the call charge of 50 yen. Then, it corresponds to the directory guidance requested by the caller. On the other hand, if the coin detection signal is not confirmed, the operator informs the caller that additional coins will be inserted, and after confirming the coin detection signal, the call charge is stored by the billing signal and the caller requests. Corresponding to the number guidance to do. It should be noted that a model that allows one-way calling because there is no reversal of the line requires modification to cancel one-way calling.

When the caller makes a general pay call, the line is repolarized by the response of the other party after dialing. Therefore, the relay M
The power of the control circuit 4 is cut off by the operation of. That is,
When the relay M operates, the contact m ₂ is turned on and the Zener diode ZD is short-circuited, so that the diodes D7, D
The capacitors C ₂ and C ₃ are no longer charged via 8. Therefore, the power supply from the power supply circuit 1 to the control circuit 4 is cut off, and the coin detection signal is not sent out even if the fifth coin is inserted.

In this way, the public telephone in the first embodiment detects the fifth coin with the photo coupler 3, and the photo coupler 3
Since the coin detection signal is transmitted from the oscillation circuit 5 in response to the signal from, the exchange can determine that the call charge of a predetermined amount has been inserted.

Next, FIG. 4 is a circuit diagram of a public telephone showing a second embodiment according to the present invention. In the figure, parts that are the same as or correspond to those in FIG. R _{4 to} R ₈ are resistors,
Q _{1 to} Q ₂ are transistors, N ₂ is a logic gate, PC
1 and PC2 are photo couplers. Further, 6 constitutes a call loop opening circuit.

Now, as in Fig. ₁ , the off-hook hook switch HS ₁ ,,
When HS ₂ and HS ₃ are switched, and then a coin is inserted, the coin detection contact CCL is also turned on and a DC loop is formed. At this time, the power supply circuit 1 supplies power to the control circuit 4 to start control. Then, the control circuit 4 detects the dial transmission of the caller by the ON / OFF signal DC of the photocoupler PC1, and identifies the number and digit of this dial transmission. As a result of this dial identification, when the dial destination is the number guidance, the control circuit 4 determines from the signal from the photo coupler 3 whether or not a predetermined call charge has been put. Here, when the energization charge is insufficient, that is, when “L” is input from the photocoupler 3 to the control circuit 4 via the resistor R ₂ , a call is made via the resistor R ₄ and the logic gate N ₂ by the LC signal. The photo coupler PC2 of the loop opening circuit 6 is turned on. As a result, the base and the emitter of the transistor Q ₂ are short-circuited,
The transistors Q ₂ and Q ₁ are turned off and the call loop is opened. On the other hand, when the predetermined call charge (50 yen) is put in, the control circuit 4 does not operate the call loop opening circuit 6, so that the call loop is held and the call for the number guidance can be made by the response of the exchange.

As a result of the dial identification in the control circuit 4, if the dial transmission destination is a general pay call, the control circuit 4 does not judge the signal from the photocoupler 3, so that the call loop remains held. Then, as in the case of FIG. 1, the relay M operates due to the reversal of the line in the callee response, and the power supply to the control circuit 4 is cut off, which does not affect the subsequent calls.

In this way, the public telephone in the second embodiment identifies the caller's dialing call, and when the destination is directory assistance, it is determined whether a predetermined call charge has been put,
When the call charge is insufficient, the call loop opening circuit 6 opens the call loop. Therefore, the calling party can talk with the exchange only when the predetermined call charge is put in, and the exchange can store the predetermined call charge by the billing signal.

FIG. 6 is a schematic diagram of a coin accumulating section showing a third embodiment according to the present invention. In the figure, 31 is a slot, 32 is a sorting mechanism for sorting coins, 33 is a storage lever, 34 is a cooling lever, 35b is a movable contact of a coin detection contact ccl, and 35a is a coin pressing roller provided on the movable contact 35a. , 35c are fixed contacts of the coin detection contact ccl, and 36 is a coin.

Now, coins 3 inserted from the slot 31 after off-hook
6 is sorted by the sorting mechanism 32, and for example, only 50-yen coins are accumulated and pressed against the storage lever 33. At this time, when the coin pressing roller 35a is pushed by the coin 36, the movable contact 35b comes into contact with the fixed contact 35c.
As a result, it can be determined that a predetermined amount of coins has been inserted and accumulated. Then, the coin 36 is stored in a storage safe (not shown) by the operation of the storage lever 33 in response to the arrival of the charging signal. On the other hand, if the on-hook operation is performed in response to the end of the call, the cooling lever 34 is actuated and the remaining coins are discharged to the cooling port (not shown).

Next, FIG. 5 is a circuit diagram of a public telephone showing a third embodiment according to the present invention. In the figure, the same or corresponding parts as those in FIGS. 1 and 2 are designated by the same reference numerals. I is an existing public telephone, IIa is an additional circuit connected to the existing public telephone I, IIb is a line terminal L ₁ of the existing public telephone I,
It is an additional device connected in parallel to L ₂ . In addition, R ₈ ~
R ₁₂ is a resistor, Q ₃ and Q ₄ are transistors, PC3 is a photocoupler, IN is an inductor, OL is a loop forming relay, ol
Is a contact of the loop forming relay OL, KP is a charging relay kp
Is a contact of the charging relay K, L is a relay, l is a contact of the relay L, and HS is a fax switch. Further, numeral 7 constitutes an automatic dial circuit for automatically transmitting the dial number.

Next, the operation of this public telephone will be described.

First, the off-hook hook turns the hook switch HS on,
Then, when a coin is inserted into the insertion port shown in FIG. 5, the coin detection point ccl is also turned on, and a DC loop is formed by the addition device IIb. A DC voltage is supplied from the station to the power supply circuit 1 via the line terminal L _{1, the} coin detection contact ccl, the transistor Q _3, and the diode D ₁ . The power supply circuit 1 supplies power to the control circuit 4 as described with reference to FIG.
Seconds) has elapsed, on such a dialing directory assistance emitting diodes of Fuotokapura PC3 via logic gates N ₁ and resistor R ₁ (104 number), thereby turning off. Thus, the transistors Q _3, Q ₄ of the automatic dialing circuit 7 is turned on, directory assistance in line performs off (104) automatically sends. After this automatic transmission, the control circuit 4 operates the loop forming relay OL through the logic gate N ₂ for a prescribed time to switch the contact ol of the additional circuit IIa. As a result, the self-holding type relay L operates to turn on the contact 1 that short-circuits the coin detection contact CCL. The relay L can be restored by a circuit in the telephone as in the conventional case. ON of contact l is detection contact
The same as when the CCL is turned on, a call circuit (not shown) and a call loop are formed, and the call can be made by the response of the exchange. Then, when the exchange checks the number and then sends out the charging signal, the charging relay KP of the additional device IIb operates to turn on the contact kp. The control circuit 4 receives the signal for turning on the contact kp via the resistor R ₁₀ and operates the storage lever drive relay (not shown) to store the coin 36 shown in FIG. Then, the operator informs the calling party of the checked number.

Since the coins are stored according to the judgment of the control circuit 4, a plurality of coins can be stored at one time even with one billing signal.

Also, it goes without saying that if a coin is inserted by mistake, the coin can be returned by operating the cooling lever.

In this way, the public telephone provided with the additional device in the third embodiment can automatically send the dial number of the number guide (104) when a predetermined coin is inserted into the additional device to form a call loop. . As a result, the exchange can provide the calling party with number guidance after billing.

The number of coins stored can be changed easily by changing the addition device. The loop forming method on the public telephone side may not be the method of the above embodiment.

〔The invention's effect〕

As described above, in the public telephone according to the present invention, the predetermined amount of call charge is put into the additional device, and the inserted coins are stored by the billing signal from the station connected to the number guidance. It is possible to securely store a predetermined amount of call charges based on the guide, and it is possible to prevent the situation where the user is unjustly disadvantaged due to a drastic failure due to insufficient charges, and it is possible to secure a charge for the number guide The effect is that it can be dealt with. Further, the configuration of the present invention can be easily implemented on an existing public telephone, and if all the various public telephones have the same configuration when paying for directory assistance, the calling party and the exchange can also operate. The effect is tremendous without being confused.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a public telephone showing a first embodiment according to the present invention, FIG. 2 is a schematic diagram of a coin storage unit thereof, FIG. 3 is a sectional view of a photo coupler thereof, and FIG. Second pertaining to
FIG. 5 is a circuit diagram of the public telephone showing the embodiment of FIG. 5, FIG. 5 is a circuit diagram of the public telephone showing the third embodiment, and FIG. 6 is a schematic diagram of the coin storage unit. 3 ... Photo coupler, 4 ... Control circuit, 5 ... Oscillation circuit, 6 ... Call loop open circuit, 7 ... Automatic dial circuit.

Claims (1)

[Claims] 1. A coin storage type public telephone, which forms a communication loop by inserting coins, in accordance with detection means for detecting that a predetermined amount of coins has been inserted and accumulated, and detection output of the detection means. An addition provided with a call loop forming means for forming the call loop, a dial number sending means for automatically sending a dial number for preset number guidance, and a bill storing means for storing the inserted coins by a billing signal. A public telephone, which is provided with a device.