JPS6245740B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION When a calling signal arrives from a telephone line, the present invention detects the calling signal, performs an incoming call operation, and sends a response message recorded on an answering tape to the caller. This invention relates to an automatic answering machine that records messages on a recording tape. The automatic answering machine automatically sends a message to the caller as soon as the telephone line is connected. There is no problem if the caller makes the call using a telephone that is not a public telephone, but if the caller uses a public telephone to make the call, as soon as the telephone line is closed, a signal called a paytone is sent. Since the signal comes from the telephone line, the beginning of the response message is masked by the signal, and the caller cannot clearly hear that part. In order to solve this problem, in the past, a silent section was provided at the beginning of the response tape, after which a response message was recorded. Although it is possible to prevent masking by paytone signals in this way, automatic answering machine answering system uses endless tape as the answering tape, and the answering recording time is determined by the time required for one round of the answering tape. The problem with the device was that the recording time was shorter for the silent portions. Furthermore, the length of the paytone signal that arrives when the telephone line is closed varies from several seconds to more than ten seconds depending on the country.
As the length of this paytone signal becomes longer, not only does it become necessary to lengthen the silent portion, but also the recording time becomes shorter accordingly. The present invention aims to provide an automatic answering machine that improves the above points, and will be described in detail below with reference to the drawings. The illustrated circuit is an embodiment of the present invention, and in the figure (1) is a connection terminal with a telephone line, (2) and (3) are line transformers, and (4) is amplification of the calling signal arriving from the telephone line. 5 is a rectifier circuit that rectifies the signal amplified by the amplifier circuit 4; 6 is a transistor that performs on/off operation according to the output signal of the rectifier circuit 5 ; 7 is the transistor 6;
This is a calling signal identification circuit that identifies the type of a calling signal based on the signal obtained by the on/off operation of the circuit, and outputs a signal corresponding to the type to output terminals 7a and 7b. Reference numeral 8 denotes a constant power supply circuit that supplies power to each circuit that is in an operating state in a standby state, such as the amplifier circuit 4 that amplifies a calling signal. Reference numeral 9 denotes a resistor 10 and a capacitor 1 connected between the power supply line of the constant power supply circuit 8 and the ground.
1. A first transistor 12, etc., which controls charging and discharging of the capacitor 11 and to which the output signal of the rectifying circuit 5 is applied to its base.
This is a station line control circuit. 13 is the output terminal 7a of the calling signal identification circuit 7 and the first station line control circuit;
a transistor 14 whose base is connected to the connection point between the resistor 10 and the capacitor 11 forming the transistor 9 ;
This is a second station line control circuit configured as follows. Reference numeral 15 denotes a third office line control circuit which is operated by a signal obtained from the output terminal 7b of the calling signal identification circuit 7; The application to is controlled by the second station line control circuit 13 . Reference numeral 16 denotes an LS relay circuit which is activated by the output signal of the third office line control circuit 15 and switches a switch 17 for closing the telephone line. Reference numerals 18 and 19 are recording and reproducing amplifier circuits connected to the line transformer 3, which amplify the response message and send it to the caller, as well as amplify the message from the caller. Reference numeral 20 denotes an endless response tape on which a response message is recorded.
A control signal called a beep tone that switches the TR relay is recorded, and the tape switch 2
A conductive foil 22 cooperating with 1 is provided. 23
is a response tape recording/playback magnetic head which records a response message on the response tape 20 and also plays back the message. Reference numeral 24 indicates a beep tone detection circuit that detects and amplifies the beep tone recorded on the response tape 20 when it is reproduced, and 25 indicates changeover switches 26 and 27 operated by the output of the beep tone detection circuit 24. This is a TR relay drive circuit that drives a TR relay (not shown) that switches the state to the opposite side and also switches the recording and reproducing amplifier circuits 18 and 19 from the reproducing state to the recording state. 28
a tape control circuit that generates a high level DC output when the tape switch 21 is in an open state;
Reference numeral 29 denotes a starting signal generating circuit which outputs a starting signal for a predetermined period of time when the output signal of the third station line control circuit 15 is applied. 30 is the response tape 2
The first motor control circuit controls the operation of the electric motor 31 that drives the drive transistor 32 and the operation of the drive transistor 32, and also controls the circuit necessary for the operation of the automatic answering machine after receiving a call. Power supply circuit 33 that supplies power
A power supply control transistor 34 that controls the operation of
It is composed of etc. The base of the power supply control transistor 34 is connected to the tape control circuit 28 and the activation signal generation circuit 29, and is configured such that its on/off operation is controlled by the output signal thereof. 35 is a recording tape on which a message from the caller is recorded; 36 is a magnetic head for recording and reproducing the recording tape that records the message on the recording tape 35 and also plays back the message; 37 is the recording tape. 35 is an electric motor that drives the TR relay drive circuit 25; 38 is the TR relay drive circuit 25;
A second electric motor control circuit is activated by the output signal of the electric motor 37 to control the operation of the electric motor 37. 39 is a central office line protection timer circuit that starts operating when an incoming call is received, and includes a resistor 40 and a capacitor 4.
1, and a diode 42 and a resistor 43 connected in parallel to the capacitor 41 and in series with each other to control the charging potential of the capacitor 41. Power is constantly supplied to the station line protection timer circuit 39 from the power supply circuit 8, and in a standby state, the charging potential of the capacitor 41 is set to a low level by a diode 42 and a resistor 43. The connection point between the diode 42 and the resistor 43, that is, the cathode of the diode 42, is connected to the driving transistor 32 constituting the first motor control circuit 30 .
is connected to the collector of the circuit via a diode 44. Therefore, when the driving transistor 32 is conductive and drives the motor 31, the diode 4
A high voltage is applied to the cathode of the diode 42 through the capacitor 4, and the diode 42 is reverse biased, and charging of the capacitor 41, that is, a timer operation is started. The set time of the office line protection timer circuit 39 is set to be longer than the time required for the response tape 20 to go around once. Reference numeral 45 denotes a magnet ring which rotates in conjunction with the reel shaft 46 which rotates when the recording tape 35 is running, and has the function of opening and closing the switch 47. 48 is the switch 4
This is a rotation detection circuit that detects the rotational state of the reel shaft 46 by opening and closing the switch 47, and generates an output signal in response to the opening and closing of the switch 47. 49 is a recording tape protection circuit that starts operating when the recording tape 35 starts running, and includes a time constant circuit consisting of a resistor 50 and a capacitor 51;
1 to control the charging potential of the capacitor 51.
The diode 52 and the resistor 53 are connected in parallel to each other and connected in series to each other.
Power is constantly supplied to the recording tape protection circuit 49 from the power supply circuit 8, and the charging potential of the capacitor 51 is set to a low level by a diode 52 and a resistor 53 in the standby state and response message sending state. has been done. The connection point between the diode 52 and the resistor 53, that is, the diode 52
The cathode of is connected to the output terminal of the second motor control circuit 38. Therefore, when the second motor control circuit 38 operates to drive the motor 37, a high voltage is applied to the cathode of the diode 52, and the diode 52 is reverse biased, so that charging of the capacitor 51 is started. Ru. However, the connection point between the capacitor 51 and the resistor 50 is connected to the rotation detection circuit 48, and while the reel shaft 46 is rotating, the charge in the capacitor 51 is discharged by the rotation detection circuit 48.
The charging potential of the capacitor 51 is configured not to rise above a predetermined level. Reference numeral 54 indicates a compulsory device that enters an operating state when the charged potential of the capacitor 41 constituting the office line protection timer circuit 39 or the capacitor 51 constituting the recording tape protection circuit 49 exceeds a predetermined value, and maintains that state thereafter. It is a disconnection holding circuit, and its output terminal is connected to the base of the transistor 14 constituting the second station line control circuit 13 , the reset terminal 15a of the third station line control circuit 15, and the reset terminal 33a of the power supply circuit 33. There is. Reference numeral 55 indicates a tape end detection circuit for detecting that the recording tape 35 approaches the end based on a signal obtained from the rotation detection circuit 48, and 56 indicates an operating state when an output signal is issued from the tape end detection circuit 55. This circuit is a tape end detection/holding circuit which holds the state after the end of the tape, and its output terminal is connected to the base of the transistor 14 constituting the second station line control circuit 13 . The operating point of the tape end detection circuit 55 is set at a point where the remaining amount of the recording tape 35 is slightly larger than the amount of tape required for one call controlled by the response tape 20. 57 oscillates when the recording operation is completed due to one round of the answering tape 20 and when the connection with the telephone line is released due to the operation of the forced disconnection holding circuit 54, and the caller is notified of the completion of the recording operation, etc. This is a notification circuit that will help you. Reference numeral 58 denotes a DC erasing type magnetic head for erasing the signal recorded on the recording tape 35. When a message from a caller is recorded, a DC current is supplied through the switch 27 to perform the erasing operation, resulting in a high-speed erasing operation. At times, DC current is supplied via the high-speed erase switch 59 to perform an erase operation. A paytone detection and amplification circuit 60 detects and amplifies a paytone signal arriving from a telephone line, and has filter characteristics. 61 is a NAND circuit whose output terminal becomes L (low level) level when the amplified paytone signal is output from the paytone detection amplifier circuit 60; 62 is a NAND circuit whose output terminal becomes H level for a predetermined time when the signal level of the input terminal becomes L level; 63 is an inverting circuit that inverts the output signal of the control signal generating circuit 62. 64 is a paytone control transistor whose collector and emitter are connected between the signal path on the input side of the control signal generation circuit 62 and the ground, and its base is connected to the third station line control circuit through a capacitor 65 and a resistor 66. 15 output terminals. Therefore, the paytone control transistor 64 is inverted to the on state by the output signal of the third station line control circuit 15, and is inverted back to the off state when the capacitor 65 is completely charged. Reference numeral 67 denotes a paytone pause circuit which enters an operating state and maintains that state when the output signal of the third office line control circuit 15 is applied, and its output terminal is connected to the first motor control circuit 30 as shown in the figure. ing. That is, when the paytone pause circuit 67 is in operation, its output signal, which is an H level signal, is applied to the base of the driving transistor 32 through the diode 68, reverse biasing the transistor 32, and is applied through the resistor 69 and the diode 70. Diode 42 of the office line protection timer circuit 39
is applied to the cathode of the diode 42 to reverse bias the diode 42. 71 is the paytone pause circuit 67
This is a release transistor that returns the inverter to an inoperable state, and its base is connected to the output terminal of the inverter circuit 63 . 72 is the response tape 20
This circuit outputs an H level signal when the tape switch 21 is closed by the conductive foil 22, and outputs an L level signal when the tape switch 21 is opened. Reference numeral 73 designates an incoming call operation control transistor that controls the signal application operation to the LS relay circuit 16 and paytone pause circuit 67 of the third office line control circuit 15, and its base is connected to the output terminal of the conductive foil escape detection circuit 72. connected, the collector of which is a diode 74,7
5 to control signal paths 76, 77. Reference numeral 78 denotes a noise prevention transistor whose collector and emitter are connected between the signal path 79 of the recording and reproducing amplifier circuits 18 and 19 and the ground, and whose base is connected to the output terminal of the paytone pause circuit 67. When the paytone pause circuit 67 is in operation, it becomes conductive and serves to prevent noise from being transmitted to the caller. Although the present invention is configured as described above, the calling signal identification circuit 7 will be explained. If the calling signal arriving from the telephone line is an intermittent signal, an H level signal is output from output terminals 7a and 7b, and after a predetermined time, e.g. 10 seconds, the output signal of output terminal 7a is inverted to L level, and the calling signal is resumed. When the signal is a continuous signal, an H level signal is output from the output terminals 7a and 7b, and in this case, compared to the case of an intermittent signal, the output signal of the output terminal 7a is reversed to the L level after a short time, for example, 2 seconds. The calling signal identification circuit 7 is configured to do this. The present invention is constructed as described above, and its operation will be explained next. In the standby state, the tape switch 21 is closed by the conductive foil 22, and the switches 17, 26, 27, 59 are in the state shown. Further, since the transistor 12 constituting the first station line control circuit 9 is in an off state, the charging potential of the capacitor 11 is at a high level, and the transistor 14 constituting the second station line control circuit 13 is in an on state. Also, the release transistor 71 and the incoming call operation control transistor 73 are both in the on state, and the paytone control transistor 64 is in the off state. In such a standby state, when a calling signal arrives from the telephone line, the calling signal is sent to switch 17.
is led to the line transformer 2 through the amplifier circuit 4
is amplified by The call signal amplified by the amplifier circuit 4 is rectified by the rectifier circuit 5 and then applied to the bases of the transistors 6 and 12, turning the transistors 6 and 12 on and off. When the calling signal is an intermittent signal, the transistor 12 repeats on and off operations according to the signal cycle, but the charging time constant of the capacitor 11 is set to be larger than the off-operation time of the transistor 12 due to the calling signal. Furthermore, if the discharge time constant of the transistor 12 is set to be small, the charging potential of the capacitor 11 will not rise to a predetermined potential, that is, a potential that turns on the transistor 14 while the calling signal is arriving. . If the calling signal is an intermittent signal, as described above, an H level signal is output from the output terminals 7a and 7b of the calling signal identification circuit 7, and after a predetermined time, the output from the output terminal 7a becomes an L level. Therefore, when the signal at the output terminal 7a is at H level, the transistor 14 is in an on state, and the signal at the output terminal 7b is not applied to the third station line control circuit 15. and output terminal 7
When the signal a inverts to L level after a predetermined time,
Since the transistor 14, which was in the on state, is inverted to the off state, the H level signal at the output terminal 7b is applied to the third station line control circuit 15, and the third station line control circuit 15 is inverted to the operating state and remains in that state. hold. Further, when the calling signal is a continuous signal, the transistor 12 constituting the first station line control circuit 9 is in an on state, and the charging potential of the capacitor 11 does not rise to a predetermined potential. In this case, the output of the output terminal 7a becomes the L level a short time after the output terminals 7a and 7b of the calling signal identification circuit output the H level signal. Third station line control circuit 1
5, the third station line control circuit 15 inverts to the operating state and maintains that state. As described above, the operation of inverting the operating state of the third office line control circuit 15 according to the type of the calling signal is performed, and the subsequent operation will be explained below. When the third station line control circuit 15 becomes operational, an H level signal is output from its output terminal, but since the incoming call operation control transistor 73 is in the on state at this time, the H level signal is transmitted to the LS relay circuit 1.
6 and paytone pause circuit 67. The H level signal which is the output of the third station line control circuit 15 is applied to the activation signal generation circuit 29, and the activation signal generation circuit 29 causes the conductive foil 22 of the response tape 20 to escape from the tape switch 21 for a predetermined period of time. The H-level output signal of the activation signal generating circuit 29, which outputs an H-level signal for the time required for
4 is turned on. When the power supply control transistor 34 is turned on, the power supply circuit 33 becomes operational and the first motor control circuit 30
etc. starts power supply operation. When power is supplied to the first motor control circuit 30 , the driving transistor 32 is turned on and the motor 31 is rotated. When the electric motor 31 starts rotating, the response tape 20 starts running and the tape switch 2
1 is made open. As a result, an H level signal is output from the tape control circuit 28 and applied to the base of the power supply control transistor 34, and after the output signal from the activation signal generation circuit 29 disappears, the power supply control transistor 34 is The output signal from the tape control circuit 28 keeps it in the on state. Further, the output signal from the third office line control circuit 15 is applied to the base of the paytone control transistor 64 to turn the transistor 64 on for a predetermined period of time. As a result, the control signal generation circuit 62 is triggered by the control transistor 64 and becomes operational;
An H level signal is output to the output terminal for a predetermined period of time, for example, 2 seconds. The H level signal is an inverting circuit
63 , the release transistor 71, which was in the on state, is inverted to the off state. As described above, when the third station line control circuit 15 becomes operational, each part operates, and when the tape switch 21 becomes open, the conductive foil escape circuit 72
is activated to reverse the incoming call operation control transistor 73, which was in the on state, to the off state. As a result, the output signal of the third station line control circuit 15 is applied to the LS relay circuit 16 and the paytone pause circuit 67. When the LS relay circuit 16 is activated, the switch 17 is switched to close the telephone line, and when the paytone pause circuit 67 is activated, the H level signal output from the paytone pause circuit 67 is sent to the first motor control circuit. applied to 30 ,
The drive transistor 32 is reverse biased to turn it off. Therefore, motor 31 stops rotating immediately after tape switch 21 is released. The incoming call operation according to the present invention is carried out as described above. Next, the operation depending on the presence or absence of a paytone signal will be explained. A case where the caller does not use a public telephone or a case where the paytone signal is shorter than the operation time of the control signal generation circuit 62 even if the caller uses a public telephone will be explained. In this case, the telephone line is closed by the above-mentioned operation and the response tape 20 stops running, but after a predetermined period of time, the output signal from the control signal generation circuit 62 becomes H.
The level is reversed to L bell. The resulting inverting circuit
The output level of 63 becomes H level, turning on the release transistor 71 and resetting the paytone pause circuit 67. Therefore, the paytone pause circuit 67 is reversed to a non-operating state and the electric motor 31 starts rotating. Next, the caller uses a public telephone, and the paytone signal is transmitted to the control signal generation circuit 6.
A case where the operation time is longer than 2 will be explained. In this case, after the connection with the telephone line is established, a paytone signal arrives from the telephone line, and the paytone signal is detected and amplified by the paytone detection and amplification circuit 60. The signal amplified to the H level by the detection amplifier circuit 60 is inverted to the L level by the NAND circuit 61. As a result, the control signal generation circuit 62 continues to be triggered while the paytone signal continues to arrive.
2 outputs an H level signal. Therefore, during that time, the release transistor 71 is in an off state, and the response tape 20 is in a stopped state. When the paytone signal from the telephone line disappears, the canceling transistor 71 is turned on, resetting the paytone pause circuit 67, and the response tape 20 starts running as described above. Note that when the response tape 20 is stopped by the paytone pause circuit 67, the noise prevention transistor 78 is turned on by the output of the paytone pause circuit 67, so that induced noise etc. are amplified for recording and playback. It is not amplified by circuits 18 and 19 and sent to the caller. After the above operations are performed, the response tape 20 starts running. When the response tape 20 starts running, the response message recorded on the tape 20 is transferred to the response tape recording/playback magnetic head 23. After being reproduced, it is sent to the caller via the switch 26, the recording and reproduction amplifier circuits 18 and 19, and the line transformer 3. After the response message is sent to the caller, the beep tone signal recorded on the response tape 20 is played back, and when the beep tone signal is detected by the beep tone detection circuit 24, the TR relay drive circuit 25 operates and switches 26, 27 to the opposite side from the illustrated state, and the recording and reproducing amplifier circuits 18 and 19 are also switched from the reproducing state to the recording state. At the same time, the second motor control circuit 38 becomes operational and rotates the motor 37 to run the recording tape 35. Therefore, the message from the caller is sent to line transformer 3.
- Recording/playback amplifier circuit 18, 19 - Switch 26
Magnetic head 3 for recording and playback of recording tape through
6 and is recorded on the recording tape 35. In this state, the message from the caller is recorded on the recording tape 35, but in this recording state, the response tape 20 goes around once and the tape switch 2 is turned off.
1 is closed by the conductive foil 22, the output of the tape control circuit 28 becomes L level, and the output of the conductive foil escape detection circuit 28 becomes H level. As a result, the power supply control transistor 34 is reversed from the on state to the off state, and the power supply circuit 33 is brought into a non-operating state and no power supply operation is performed. Therefore, both the electric motors 31 and 37 stop rotating, and the response tape 20 stops with the conductive foil 22 closing the tape switch 21. Further, since the output of the conductive foil escape detection circuit 72 becomes H level, the incoming operation control transistor 73 is turned on, and the LS relay circuit 16 is inverted and returned to the non-operating state. This restoration of the LS relay circuit 16 releases the connection with the telephone line, but
At this time, the notification circuit 57 operates to notify the caller that the recording operation has been completed. After such an operation is performed, the automatic answering machine returns to the standby state. Further, by returning to the standby state, the third station line control circuit 15 is inverted and returned to the non-operating state. Next, when the caller uses a public telephone to make a call, what happens when a paytone signal, which is a toll reminder, arrives from the telephone line while the caller is sending a response message or recording the caller's message. I will explain about it. The length of the paytone signal that arrives in this case is shorter than the paytone signal that arrives at the time of arrival, and shorter than the operating time of the control signal generation circuit 62. When a paytone signal arrives while the automatic answering machine is operating, the paytone signal is detected and amplified by the paytone detection and amplification circuit 60 and triggers the control signal generation circuit 62 as described above. As a result, the control signal generating circuit 62 is inverted to the operating state for a predetermined time and then returns to the non-operating state. Therefore, the response tape 20 stops running for a predetermined period of time and then starts running again every time a paytone signal arrives. As is clear from the above explanation, when an incoming call is received, the running of the response tape 20 is temporarily stopped regardless of the presence or absence of a paytone signal, and if the paytone signal is longer than a predetermined time, the paytone signal is not received. Response tape 20 while you are there
Since the response tape 20 is stopped for a predetermined period of time when a paytone signal arrives during operation, the response message recorded on the response tape 20 is masked by the paytone signal. The caller can clearly hear the response message. Next, the operation of the office line protection timer circuit 39 will be explained. In the standby state, the charging potential of the capacitor 41 is maintained at a low potential by the diode 42 and the resistor 43. When an incoming call operation is performed and the first motor control circuit 30 becomes operational, a high voltage is applied to the cathode of the diode 42 through the driving transistor 32 and the diode 44, and the diode 42 is reverse biased. As a result, the capacitor 41 is charged through the resistor 40, and the station line protection timer circuit 39 starts its timer operation. Further, when a paytone signal arrives or for a predetermined period of time immediately after an incoming call operation, the drive transistor 32 constituting the first electric control circuit 30 is turned off due to the operation of the paytone pause circuit 67, and the electric motor 31 is brought into a stopped state. However, in this state, the output signal of the paytone pause circuit 67 is applied to the cathode of the diode 42 through the diode 70, and the diode 42 is maintained in a reverse bias state, so that the station line protection timer circuit 39 is not reset and the timer is activated. Keep it working. Since the set time of the station line protection timer circuit 39 is set to be longer than the time required for the response tape 20 to go around once, during normal operation, the tape does not reach a predetermined value until the charging potential of the capacitor 41 reaches a predetermined value. The switch 21 is closed and the automatic answering machine returns to the standby state by the operation described above. As a result, the reverse bias voltage applied to the diode 42 disappears, the charge in the capacitor 41 is discharged through the diode 42 and the resistor 43, and the station line protection timer circuit 39 is reset to its initial state. Next, the operation in the case where an accident such as cutting or wrapping of the response tape 20 or a faulty contact of the tape switch 21 occurs will be explained. When such an accident occurs, the operation of disconnecting the telephone line by one rotation of the response tape 20 is not performed, but the operation of resetting the office line protection timer circuit 39 is also not performed. Therefore, the station line protection timer circuit 39
The charging potential of the capacitor 41 that constitutes the capacitor 41 gradually rises, and after a predetermined period of time, the capacitor 41
The charging potential reaches a predetermined potential, and its output signal is applied to the forced disconnection holding circuit 54, which inverts to the operating state and maintains that state. As a result, the output signal of the forced disconnection holding circuit 54 is transmitted to the third station line control circuit 15 and the power supply circuit 33.
The signal is applied to the reset terminals 15a and 33a of the circuit and the base of the transistor 14 constituting the second station line control circuit 13 . Therefore, both the third office line control circuit 15 and the power supply circuit 33 are reversed from the operating state to the non-operating state, and the telephone line is forcibly disconnected. Further, since the transistor 14 constituting the second office line control circuit 13 is kept in an on state from now on, even if a calling signal arrives, the automatic answering machine will not operate. As described above, the operation is performed when an accident occurs in the response tape 20.Next, we will explain the operation when an accident occurs in the paytone pause circuit system and the response tape 20 is held in a stopped state. . In such a state, the output signal of the paytone pause circuit 67 reverse biases the diode 42 constituting the office line protection timer circuit 39 , so the office line protection timer circuit 39 performs a timer operation and performs a predetermined timing. After a period of time has elapsed, the forced disconnection holding circuit 54 is inverted to the operating state. Therefore, the same operation as in the case where an accident occurs in the response tape 20 is performed, and the connection with the telephone line is released, and it becomes impossible to receive calls from now on. Next, the operation when an accident such as cutting or winding of the recording tape 35 occurs will be explained. While the recording tape 35 is running, that is, while a message from the caller is being recorded, the diode 52 constituting the recording tape protection circuit 49 is in a reverse bias state, and the capacitor 51 is charged, but the recording tape 35 is not running. Since the reel shaft 46 is rotating during this period, its charging potential does not rise to a predetermined voltage. That is, as the magnet ring 45 rotates as the reel shaft 46 rotates, the switch 47 repeats opening and closing, and the opening and closing of the switch 47 activates the rotation detection circuit 48, which protects the recording tape. The charging and discharging of the capacitor 51 of 49 is controlled to prevent its charging potential from rising to a predetermined voltage. The above-described operation is performed when the recording tape 35 is running normally, but the operation when an accident occurs in the recording tape 35 will be described next. When an accident occurs, the reel shaft 46 stops rotating, and as a result, the switch 47 cannot be opened or closed by the magnet ring 45. Therefore, the rotation detection circuit 48 becomes inactive and the discharging action of the capacitor 51 stops.
The capacitor 51 is only charged. Then, after a predetermined period of time, the capacitor 5
1 rises to a predetermined potential, and the forced cut holding circuit 54 is inverted to the operating state. When the forced disconnection holding circuit 54 is reversed to the operating state, the same operation as in the case where an accident occurs in the answering tape 20 is carried out, and the connection with the telephone line is released, and the incoming call is subsequently disabled. As described above, a protective operation is performed in case an accident such as cutting occurs in the response tape 20 and the recording tape 35, but if the response operation is performed normally and the remaining amount of the recording tape 35 becomes low, The operation will be explained. When messages from the caller are recorded one after another and the remaining amount of recording tape 35 becomes slightly longer than one call, the tape end detection circuit 5
5 operates to invert the tape end detection/holding circuit 56 to the operating state, and at the same time, the detection/holding circuit 56 maintains the operating state. As a result, the output signal of the tape end detection holding circuit 56 is transmitted to the second station line control circuit 1.
3 to the base of transistor 14 to keep transistor 14 in the on state. When the recording of the message from the caller on the recording tape 35 is completed, the automatic answering machine returns to the standby state, but after this operation, the transistor 14 is activated by the tape end detection holding circuit 56. Therefore, since it is kept in the on state, even if a paging signal arrives thereafter, the third office line control circuit 15 will not operate, and no incoming call operation will be performed. Note that the forced disconnection holding circuit 54 is activated by the output signals of the office line protection timer circuit 39 and the recording tape protection circuit 49 , and when the telephone line is forcibly disconnected, the notification circuit 57 is activated. A notification sound is sent to the caller. While a message from a caller is being recorded on the recording tape 35, current from the power supply circuit 33 is supplied to the DC erase type magnetic head 58 through the switch 27 and the diode 80, and the magnetic head 58 performs an erase operation. . Further, during the high-speed erasing operation, the recording tape 35 is rapidly forwarded by the high-speed erasing operation, and the high-speed erasing switch 5 is
9 is closed and the switch 59 and diode 81
A current is constantly supplied from the power supply circuit 8 to the DC erase type magnetic head 58 through the DC erase type magnetic head 58, and the magnetic head 58 performs an erase operation for high speed erase. As explained above, the present invention provides a response tape that has a response message recorded thereon and is provided with a conductive foil that closes a tape switch when the tape switch is in standby mode. The telephone line is closed by opening the now tape switch, and immediately after the telephone line is closed, the paytone pause circuit is activated to stop the running of the response tape, thereby preventing the sending of the response message. After a predetermined time, the tape is run again to send a response message to the caller, and when the paytone signal continues for longer than the predetermined time, the paytone pause circuit is maintained in an operating state, and during that time the response tape is maintained in a non-running state. Therefore, regardless of whether there is a paytone signal or not, and whether the length is long or short, the response message is not masked by the paytone signal, and the caller can hear the response message clearly from the beginning. . Also, since the response tape stops running immediately when the tape switch is released, the length of the response tape can be effectively utilized by recording the response message from the position where the response tape stops. The present invention has the advantage of being able to. Furthermore, since the answering tape is stopped for a predetermined time or while a paytone signal arrives and does not run unnecessarily, the answering machine is configured to set the answering recording operation time using the answering tape. If implemented in an automatic response device, the response recording operation time can be used effectively, and the present invention has a very high utility value.

[Brief explanation of the drawing]

The illustrated circuit is one embodiment of the automatic answering machine of the present invention. Explanation of main drawing numbers, 2, 3...Line transformer,
7... Calling signal identification circuit, 8... Constant power supply circuit, 9 ... First station line control circuit, 13 ... Second station line control circuit, 15... Third station line control circuit, 16...
...LS relay circuit, 18, 19...Amplifying circuit for recording and playback, 20...Response tape, 21...Tape switch, 22...Conductive foil, 23...Magnetic head for recording and playback for response tape, 24... Beep tone detection circuit, 25...TR relay drive circuit, 28
...tape control circuit, 29 ... starting signal generation circuit, 30 ... first motor control circuit, 31, 37...
...Electric motor, 32...Drive transistor, 33
... Power supply circuit, 34 ... Power supply control transistor, 35 ... Recording tape, 36 ... Magnetic head for recording and playback of recording tape, 38 ... Second motor control circuit, 39 ... Station line protection timer Circuit, 45... Magnet ring, 48... Rotation detection circuit, 49 ... Recording tape protection circuit, 54...
... Forced cutting holding circuit, 55 ... Tape end detection circuit, 56 ... Tape end detection holding circuit, 57
...Notification circuit, 59...High-speed erasing switch, 6
0... Paytone detection amplification circuit, 62... Control signal generation circuit, 63 ... Inversion circuit, 64... Paytone control transistor, 67... Paytone pause circuit, 71... Cancellation transistor, 72...
. . . Conductive foil escape detection circuit, 73 . . . Incoming operation control transistor, 78 . . . Noise prevention transistor.

Claims (1)

[Claims] 1. A response tape on which a response message is recorded and is provided with a conductive foil that closes a tape switch when in a standby state, and an electric motor that becomes operational upon arrival of a calling signal and causes the response tape to run. means for closing the telephone line by opening the tape switch as the answering tape runs; a paytone pause circuit for stopping the running of the motor, a release means for making the paytone pause circuit inactive when it is in an operating state, and a reversal operation when switching the motor control circuit to the operating state upon arrival of a call signal. and a control signal generating circuit which outputs a signal to make the release means inoperative for a predetermined period of time, and when the telephone line is closed due to opening of the tape switch, the control signal generating circuit generates a signal output from the control signal generating circuit. activating the paytone pause circuit by switching the release means to a non-operating state, thereby stopping the response tape from running for a predetermined period of time;
When a paytone signal arrives, the control signal generation circuit is held in an operating state by the paytone signal, and the response tape is run while keeping the paytone pause circuit in an operating state while the paytone signal continues to arrive. An automatic answering machine is characterized in that it is maintained in a stopped state.