JPH0212765Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an answering machine in which the line connection time of a telephone line is set according to the length of an endless tape for recording and reproducing outgoing messages.

[Prior art]

Conventionally, so-called simple answering machines use an endless tape partially provided with a sensing section made of sensing foil etc. to record and reproduce outgoing messages, and use an endless tape separate from the tape to record and reproduce incoming messages. It is configured to use a recording tape consisting of an ordinary recording/reproducing tape, and in this case, in order to effectively utilize the previous recording/reproducing tape, the transmitted message is reproduced by the length of the recording section other than the sensing section of the endless tape. A line connection period is set for sending and recording received messages.

An example of a conventional simple answering machine is configured as shown in Fig. 1, in which Ia and Ib are connection terminals connected to a telephone line, and T
is a transformer with one end of one winding connected to terminal Ia, and the other end of one winding connected to capacitor C1,
It is connected to the terminal Ib via the cathode and anode of the diode D1 and the cathode and anode of the Zener diode ZD. Ne is a neon lamp whose one end is connected to the terminal Ib, and the other end is connected to the anode of the diode D1. RS is a relay switch whose one end is connected to terminal b, and whose other end is connected to the other end of one winding of transformer T.

C2 and D2 are capacitors and diodes for backflow prevention that are connected in parallel between both ends of the other winding of the transformer T, and Q1 is an NPN type transistor whose base is connected to one end of the other winding of the transformer T. 1 transistor, and its emitter is grounded. R
1 and C3 are resistors and capacitors provided in parallel between the other end of the other winding of the transformer T and the ground.

C4 is an integration capacitor provided between the collector of transistor Q1 and ground, and A1 is a diode D whose non-inverting input terminal (+) is for preventing backflow.
The first comparator amplifier is connected to the cathode of a diode D2 through a resistor R2, and its inverting input terminal (-) is connected to a resistor R3 and a first answering switch S1.
It is connected to the power supply terminal (+B) via the response contact a and the switching piece. R4 and D4 are resistors and diodes for backflow prevention that are connected in series between the output terminal of amplifier A1 and the non-inverting input terminal (+), and R5 and C5 are the non-inverting input terminal (+) of amplifier A1 and the ground. This is an integrating resistor and capacitor installed in parallel between the

Xa and Xb are a pair of sensing post terminals, one post terminal Xa is connected to the output terminal of the amplifier A1 via a diode D5 and a resistor R6 for preventing backflow, and the other post terminal Xb
is grounded, and when the sensing portion of the endless tape is reproduced, the sensing portion short-circuits between both post terminals Xa and Xb. C6 is a capacitor provided between the post terminal Xa and the non-inverting input terminal (+) of the amplifier A1.

S2a is a second sending message recording/reproducing switch having a recording contact r and a reproducing contact p, the reproducing contact p is connected to the non-inverting input terminal (+) of the amplifier A1 via a resistor R7, and the switching piece is connected to the non-inverting input terminal (+) of the amplifier A1. It is connected to contact a of switch S1a via a message recording/reproducing switch S3. Q2 is a PNP type second transistor whose collector is connected to the regeneration contact p of the switch S1, and whose emitter is connected to the regeneration contact p of the switch S1.
is connected to the switching piece of the base resistor R
8. Grounded through a series circuit of capacitor C7. R9 is a resistance of a bias circuit provided between the emitter and base of transistor Q2.

Q3 is an NPN type third transistor whose collector is connected to the collector of transistor Q1 via resistor R10.
It is a transistor, and its emitter is grounded and its base is grounded via an integrating capacitor C8. RL is a relay coil provided between the collector of transistor Q3 and the power supply terminal (+B), and C9 is an integrating capacitor provided in parallel with relay coil RL.

The base of Q4 is connected to amplifier A1 via resistor R11.
This is the fourth NPN type transistor connected to the output terminal of the transistor, and its emitter is grounded. Q5
The emitter is connected to the power terminal (+B)
It is a PNP type fifth transistor, and its base is connected to the collector of transistor Q4 via resistor R12, the collector is connected to the base of transistor Q3 via resistor R13, and is connected to switch S3, and the base and emitter are connected to each other. A bias resistor R14 is provided between the two.

H1 is a received message erasing head whose one end is connected to the collector of transistor Q5 via resistor R15, and the other end is grounded. A2
is a second comparison amplifier whose non-inverting input terminal (+) is connected to the collector of the transistor Q5 via a resistor R16, and a resistor R17 and a capacitor C10 are connected in parallel between the inverting input terminal (-) and the output terminal. It is provided. PW is a power amplifier whose input terminal is connected to the output terminal of the amplifier A2 via a resistor R18, and whose output terminal is connected to the speaker SP.

S2b is a second message recording/reproducing switch whose recording contact r is connected to the power supply terminal (+B), and the switching piece is grounded via a resistor R19 and a capacitor C11. BV is a beep sound oscillator circuit whose trigger terminal is connected to the regeneration contact p of switch S2b, and H2 is a diode D at one end for preventing backflow.
This is a beep sound control head for beep sound recording and playback connected to the oscillation circuit BV through 6, and the other end is grounded. For PR, the input terminal is head H.
A preamplifier connected to the other end of the amplifier A2 through a rectifying diode D7 at the output terminal.
is connected to the non-inverting input terminal (-) of

H3 is a sent message recording/reproducing head whose one end is connected to the output terminal of the oscillation circuit BV, and the other end is grounded. MC is a microphone for recording outgoing messages, S1b is a second answering switch, the response contact a is connected to the output terminal of the microphone, and the playback contact p is connected to the other winding of the transformer T via a resistor R20 and a capacitor C12. connected to one end of the line. For D8, the cathode is switch S1
It is a rectifying diode connected to the regeneration contact p of B, and the anode is connected to the amplifier A via the resistor R21.
It is connected to the second output terminal. C13 is an integrating capacitor provided between the anode of diode D8 and ground.

A3 is a third comparator amplifier whose non-inverting input terminal (+) is connected to the collector of the transistor Q5 via a resistor R22, and whose inverting input terminal (-) is connected to the switching piece of the switch S1b via a resistor R23. At the same time, the output terminal is connected to the amplifier PW via a resistor R24, and a parallel circuit of a resistor R25 and a capacitor C14 is provided between the inverting input terminal (-) and the output terminal. D9 is a rectifier diode whose anode is connected to the oscillation circuit BV,
The cathode is connected to the switching piece of switch S1b.

S1c is a third answering switch whose switch piece is grounded, and a regeneration contact p is connected to the output terminal of the amplifier A3 via a parallel circuit of a resistor R26 and a capacitor C15. H4 is a received message recording/reproducing head whose one end is connected to the reproducing contact p of the switch S1c, and the other end is connected to the response contact a of the switch S1c. S2c is a third sending message recording/reproducing switch whose switching piece is connected to one end of the head H3, and the recording contact r is connected to the resistor R2.
7, connected to the output terminal of amplifier A3 via a parallel circuit of capacitor C16.

S1d is a fourth answering switch, the response contact a is connected to the regeneration contact p of the switch S2c, the regeneration contact p is connected to the other end of the head H4, and the switching piece is connected to a resistor R28 and a capacitor C17.
It is connected to the inverting input terminal (-) of the amplifier A2 via the inverting input terminal (-) of the amplifier A2.

The reproducing contact p of the switch S1a is connected to the motor of a tape recorder for recording and reproducing received messages.

Further, the switches S1a to S1d are switched to contact a in the answering answer mode, and the contact p is switched to the incoming message playback mode, and the switches S2a to S2c are switched to the contact r in the outgoing message recording mode. It is switched to p in the outgoing message playback mode and the answering machine response mode, respectively.

Further, the switch S3 is turned on when recording and reproducing the transmitted message.

Heads H2, H3, etc. provide a means for recording and reproducing outgoing messages.
1, H4, etc., form a received message recording and reproducing means.

In addition, amplifiers A2 and A3, switches S1b to S1
1d, S2c, etc., form a common recording and reproducing path for sent messages and received messages, and an amplifier PW, speaker SP, etc. form an audio output means.

Furthermore, amplifier A1, transistors Q1 to Q
5. Line connection/disconnection control means is formed by relay coil RL, relay switch RS, etc.

When the outgoing message recording/reproducing means has an endless tape in which a sensing section is formed in a part and is in a outgoing message recording mode in which outgoing messages are recorded on the endless tape, a switch S is selected.
2a to S2c are switched to recording contact r, and switch S3 is turned on. In addition, switch S1a~
S1d is held at response contact a.

Therefore, the voltage at the power supply terminal (+B) is applied to the non-inverting input terminal (+) of amplifier A1 via contact a of switch S1a, switch S3, and resistor R7, and the level at the output terminal of amplifier A1 becomes high level. become.

When the level of the output terminal of amplifier A1 becomes high level, transistors Q4 and Q5 are turned on, transistor Q5 is turned on, transistor Q3 is turned on, and transistor Q3 is turned on, relay coil RL is energized and relay switch RS is turned on. It turns on and the telephone line is connected.

Meanwhile, endless tapes began to be recorded,
At this time, the transmitted message from the microphone MC is inputted to the head H3 via the switch S1b and the amplifier A3, and the transmitted message is recorded by the head H3 on the audio track at the beginning of the endless tape.

Also, the transmitted message of amplifier A3 is transmitted to amplifier A.
2. It is also supplied to the speaker SP via the PW, and the outgoing message being recorded is output as audio.

When the switches S2a to S2c are switched to the playback contact p after the recording of the transmitted message is finished, the oscillation circuit is activated by the charging voltage of the capacitor C11.
BV is activated, a beep sound is output from the oscillator circuit BV to the control track of the endless tape via the head, and a beep sound to notify the start of recording of the received message is output to the control track of the endless tape immediately after recording the outgoing message. recorded.

In addition, the beep sound of the oscillation circuit BV is caused by the diode D.
The signal is also supplied to the inverting input terminal (-) of the amplifier A3 via the amplifier A3, and at this time, the level of the output terminal of the amplifier A3 is held at a low level.

Further, the oscillation circuit BV continues to oscillate only for a period until the charging voltage of the capacitor C11 is discharged and lowered to a predetermined voltage, and when the charging voltage of the capacitor C11 becomes lower than the predetermined voltage, the oscillating circuit BV stops oscillating and the beep sound is emitted. Recording ends.

When the beep sound recording is finished, the switch S
1a, S2a to S2c are switched to contact p, and the sending message recording mode ends.

By the way, if the endless tape continues to run even after the beep sound has finished recording,
At the end of the cycle, the sensing part of the endless tape shorts the post terminals Xa and Xb.

Then, when the post terminals Xa and Xb are short-circuited, the level of the output terminal of amplifier A1 becomes low level, transistors Q4 and Q5 are turned off, transistor Q5 is turned off, transistor Q3 is turned off, and relay coil RL is energized. The relay switch RS is turned off and the telephone line is disconnected.

Next, when the transmission message reproduction mode is set to confirm the transmission message recorded on the endless tape, the switches S2a to S2c are held at the contact point p, and the endless tape starts recording from the beginning.

Then, the endless tape transmission message output from head H3 is sent to switches S2c and S1d.
The message is inputted to the speaker SP via the amplifiers A2 and PW, and the transmitted message recorded on the endless tape is outputted as a sound from the speaker SP.

Also, the beep sound of the endless tape output from the head H1 is input to the diode D7 via the amplifier PR, and from the diode D7 to the amplifier A2.
A rectified signal of the reproduced beep sound is output to the inverting input terminal (-) of the amplifier A2, and the level of the output terminal of the amplifier A2 is maintained at a low level.

Furthermore, even in the transmission message playback mode, the switch S3 is turned on, the level of the output terminal of the amplifier A1 is held at a high level, the relay coil RL is energized, and the relay switch RS is turned on.
The telephone line remains connected until the sensing section shorts post terminals Xa and Xb.

Next, when in the received message playback mode for reproducing the received message recorded on the recording tape of the received message recording/reproducing means, switches S1a to
S1d switches to contact p.

Then, the recording tape is played back, and the reproduced received message is outputted from the head H4 to the speaker SP via the switch S1d, the amplifier A2, and the PW, and the reproduced received message is outputted as a sound from the speaker SP.

In addition, since switch S3 is off in the received message playback mode, if no telephone call is received, the level of the output terminal of amplifier A1 becomes low level, transistors Q4 and Q5 are turned off, and head H1 is turned off. No erasing current flows through the recording tape, and the contents of the recording tape are not erased.

By the way, when in the recording mode and playback mode of the sent message, the telephone line remains connected as mentioned above, and in this case, the called party and the line are not connected, so a busy tone (BUSSYTONE) is input from the telephone line. It turns out.

The input busy sound is then input to the inverting input terminal (-) of amplifier A3 via transformer T, capacitor C12, and resistor R20, and the busy sound is output from the output terminal of amplifier A3 to head H4, and the received message is recorded. Busy sounds may be recorded on the tape.

For example, in the outgoing message playback mode, when a beep sound is played from the head H2 after the outgoing message is played back, the beep sound is rectified by the diode D7, and the rectified output of the diode D7 outputs the output terminal of the amplifier A2. The level becomes low.

When the level of the output terminal of amplifier A2 becomes low level, diode D8 is turned off and the busy sound is input to amplifier A3, and the busy sound output from amplifier A3 is recorded on the received message recording tape via head H4. At the same time, audio is output from speaker SP.

On the other hand, in the case of Fig. 1, since the head H1 does not operate in the incoming voice playback mode, it is impossible to erase, for example, an incoming message that you want to delete after listening to it while in the mode. This is extremely inconvenient.

[Purpose of invention]

This invention was made with the above points in mind, and it prevents the recording of the busy tone input from the telephone line while the outgoing message is being recorded and played back, and also prevents the recording of the busy tone input from the telephone line while the outgoing message is being recorded and played back. The purpose is to enable the deletion of received messages.

[Structure of the idea]

This invention consists of an endless tape for recording and reproducing outgoing messages to be sent to a called party, a sending message recording/reproducing means having a recording/playing head for the tape, a tape for recording received messages from the called party, and a tape for recording and reproducing the outgoing messages from the called party. an incoming message recording/reproducing means having a recording/reproducing head and an erasing head; a common recording/reproducing path for outgoing messages and incoming messages; In an answering machine, the telephone answering machine is equipped with a voice output means for outputting sound, and a line disconnection control means for connecting a telephone line for a line connection time set by the length of the endless tape when the endless tape is being recorded and replayed. muting means for muting an input signal from the telephone line to the shared recording/reproducing path while a message is being recorded and played back; and actuating the erasing head by an erasing command operation while an incoming message is being played back from the recording tape; This answering machine is equipped with an incoming message erasing means for erasing recorded contents on a recording tape.

[Effect of idea]

Therefore, according to the answering machine of this invention, since the input signal from the telephone line to the shared recording/reproducing path is muted while the outgoing message is being recorded/replayed, the input signal from the telephone line to the shared recording/reproducing path is transmitted from the telephone line via the shared recording/reproducing path. The busy tone is not input to the recording/playback head for received messages.
It is possible to prevent the recording of a busy tone by the recording/reproducing head of received messages.

In addition, since the erase head is operated by the erase command operation while the received message is being played, the received message that you want to erase can be erased while the received message is being played back, improving usability. Can be done.

〔Example〕

Next, this invention will be explained in detail with reference to FIG. 2 showing one embodiment thereof.

In Fig. 2, the same symbols as in Fig. 1 indicate the same or equivalent elements, and D10 is a backflow prevention diode whose anode is connected to switch S3, and whose cathode is connected to the switching piece of switch S2a. . D11 has a cathode switch S3
A backflow prevention diode D12 connected to the transistor Q5 is a backflow prevention diode whose anode is connected to the collector of the transistor Q5, and whose cathode is connected to one end of the head H1 via a resistor R15. D13 is a backflow prevention diode whose cathode is connected to the cathode of diode D12.

Q6 is an NPN transistor whose base is connected to the anode of diode D13 via resistor R29, whose collector is connected to the cathode of diode D8, and whose emitter is grounded.

S2d is a fourth message recording/reproducing switch having a recording contact r and a reproducing contact p, and the switching piece is connected to the power supply terminal (+B). A4
is a fourth comparator amplifier whose inverting input terminal (-) is connected to the switching piece of the switch S2d via a resistor R30, and whose non-inverting input terminal (+) is connected to the contact r of the switch S2d via a resistor R31. A resistor R33 is connected to the cathode of the diode D11 via a resistor R32, and is provided between the non-inverting input terminal (+) and the output terminal.

Q7 is an NPN type seventh transistor whose base is connected to the output terminal of amplifier A4 via resistors R34 and R35.
It is a transistor, and its emitter is grounded. R36 is a bias resistor provided between the connection point of resistors R34 and R35 and the ground, Q8 is an eighth transistor of PNP type whose base is connected to the collector of transistor Q7 via resistor R37, and the emitter is connected to the collector of transistor Q7. is connected to the power supply terminal (+B), the collector is connected to the anode of the diode D13, and a bias resistor R38 is provided between the base and the emitter.

and amplifier A4, transistors Q6 to Q8,
The switch S2d forms a muting means and a received message erasing means.

That is, in the recording mode and the playback mode of the transmitted message, since the switch S3 is on, the voltage of the power supply terminal (+B) is applied to the non-inverting input terminal (of the amplifier A4) via the diode D11 and the resistor R32. +), the level of the output terminal of amplifier A4 becomes high level, transistors Q7 and Q8 are kept on, and transistor Q
8, the voltage of the power supply terminal (+B) is applied to the base of the transistor Q6 via the transistor Q8, and the transistor Q6 is kept on.

When the transistor Q6 is turned on, the cathode of the diode D8 and the contact p of the switch S1b are grounded via the transistor Q6, and at this time, the telephone line is connected to the transformer T and the capacitor C1.
2. The busy sound input through the resistor R20 is muted by the transistor Q6, so that the busy sound does not flow to the head H4 via the amplifier A3, and the busy sound is not recorded on the recording tape of the received message by the head H4. At the same time, the output of the busy sound from the speaker SP is also prevented.

By the way, in the answering mode, when a telephone call is received, transistor Q1 is turned on and the level of the output terminal of amplifier A4 becomes high level, and this high level causes transistors Q3 to Q
5 is turned on, relay coil RL is energized, relay switch RS is turned on, and the telephone line is connected.
At this time, the level of the non-inverting input terminal (+) of the amplifier A4 increases due to the telephone call, but since the diode D10 is provided, the level of the non-inverting input terminal (+) of the amplifier A4 increases.
The level of the output terminal of is held at a low level and the transistor Q6 is held off, and the received message inputted from the telephone line via the transformer T, the capacitor C12, and the resistor R20 is output to the transistor Q.
You can't be muted on a 6.

On the other hand, in the received message playback mode, by switching the switch S2d to contact r by the erase command operation, the voltage of the power supply terminal (+B) is inputted to the non-inverting input terminal (+) of the amplifier A4 via the switch S2d. As a result, the level of the output terminal of amplifier A4 becomes high level, and transistors Q7 and Q8
turns on.

When the transistor Q8 is turned on, a current from the power supply terminal (+B), that is, an erase current flows to the head H1 through the emitter and collector of the transistor Q8, the diode D13, and the resistor R15.
The head H1 is activated to erase the recorded contents of the recording tape.

Therefore, according to the embodiment, during the recording and reproduction of the outgoing message, the amplifier A2 is connected via the telephone line.
It is possible to mute the busy sound inputted to the common recording/reproducing path provided with the transistor Q6 to prevent the recording of the busy sound and the audio output. By switching to , the recorded message can be erased by operating the head H1, which is particularly effective when applied to a simple answering machine.

[Brief explanation of the drawing]

Figure 1 is a wiring diagram of a conventional answering machine;
The figure is a wiring diagram of one embodiment of the answering machine of this invention. A1 to A4...first to fourth comparison amplifiers,
BV...Beep sound oscillation circuit, D1-D13...Diode, H1...Erasing head, H2...Control head, H3...Outgoing message recording/playback head, H4...Receiving message recording/playback head, Q1...
Q8...first to eighth transistors, S1a~
S1d, S2a~S2d...Switch, PW...
Power amplifier, PR...previous stage amplifier, SP...speaker.

Claims (1)

[Scope of utility model registration request] An outgoing message recording/reproducing means having an endless tape for recording and reproducing an outgoing message to be sent to a called party and a recording/playing head for the tape, a recording tape for recording an incoming message from the called party, and a recording/playing head for the tape; A received message recording/reproducing means having an erasing head, a common recording/reproducing path for the transmitted message and the received message, and a voice output for the transmitted message reproduced from the endless tape and the received message reproduced from the recording tape. and a line disconnection control means for connecting a telephone line for a line connection time set by the length of the endless tape when the endless tape is being recorded and replayed. a muting means for muting an input signal from the telephone line to the shared recording/reproducing path while a received message is being played back from the recording tape; and a muting means for activating the erasing head by an erasing command operation while an incoming message is being played back from the recording tape; An answering machine equipped with an incoming message erasing means for erasing the contents.