JPS6253105B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a signal recording/erasing method for returning from remote control in an answering machine equipped with a remote control device.

For answering machines with remote control devices,
When a remote control signal is detected, a signal (mark signal) is first recorded on the same track on which the tape is recorded, or on a separate control track, to indicate the current position of the tape. It rewinds to the beginning, and after completion of rewinding, it moves to playback operation, sends the recorded content to the line, and stops playback operation when the aforementioned mark signal is detected. Furthermore, in order to prevent malfunctions in the next remote control operation, it was necessary to erase the aforementioned mark signal at the end of the remote control operation. Conventionally, the tape is rewound for a certain period of time and deleted when the next call is recorded. However, when rewinding is performed for a certain period of time, there is a considerable difference in the amount of tape actually rewound between the beginning and end of the tape. Specifically, it is about 2.5 times as large as the starting end and the ending end. For this reason, there were problems such as unerased mark signals and the end of the previous message being erased.

The present invention provides an answering machine that overcomes the above-mentioned conventional drawbacks.

This will be explained below with reference to the drawings.

FIG. 1 is a diagram showing the main part of an embodiment of the present invention. In FIG. 1, numeral 1 is a control circuit which is composed of a microcomputer and the like and monitors and controls all operations of the apparatus, and numerals 1-1 to 1-10 are its input/output terminals. 2 is an incoming signal detection circuit, 3 is a capacitor, 4 is a communication transformer, 5 is a mark signal detection circuit, 6 is a remote control signal detection circuit, 7 is a line relay, 17 is its switch, 8 is a reproducing amplifier, and 9 is a recording/reproducing circuit. 10 is a mark signal generation circuit; 11 is a bias generation circuit for erasing and recording; 1
2 is an erasing head, 13 is a plunger drive circuit for recording/reproduction, 14 is a plunger drive circuit for rewinding, 15 is a motor drive circuit, and 16 is a tape end detection circuit for detecting the beginning and end of the tape.
The plunger and other mechanical parts are omitted.

First, in the incoming call standby state, when an incoming signal from the line is input to the incoming signal detection circuit 2 via the capacitor 3 and the communication transformer 4, the detection output is input to the input terminal 1-3 of the control circuit 1 to detect the arrival of the incoming signal. It is detected and outputs an on signal from the output terminal 1-4, drives the line relay 7, turns on the line switch 17, and completes the incoming call. In this state, it performs a series of operations as an answering machine, such as sending response messages and recording message messages.

Here, when a remote control signal is input from the line, it is detected by the remote control signal detection circuit 6 and a series of operations by remote control is started. First, output end 1-
6, 1-7, and 1-9 output an on signal, turn on the bias generation circuit 11, turn on the recording/reproducing plunger drive circuit 13 and the motor drive circuit 15, and supply the erase bias to the erase head 12 for erasing. Start recording. Immediately after erasing for a preset time, the output terminals 1-5 are turned on, the mark signal generation circuit 10 is turned on, and the mark signal is recorded by the recording/reproducing head 9 for a certain period of time. Here, the mark signal is given a recording bias by a bias generation circuit 11. As shown in FIG. 2, if the recording time of the mark signal M is T, and the ratio of the amount of tape rewound at the beginning and end of the tape is n, the erasing time mentioned above is (n-
1) It should be T.

When the mark signal is recorded in the above manner, the on signals of output terminals 1-5, 1-6, 1-7, and 1-9 are released, and subsequently from output terminals 1-8 and 1-9. The on signal is output, the rewind plunger drive circuit 14 and the motor drive circuit 15 are turned on, and the rewind operation is started. When rewinding is performed to the beginning of the tape, a detection output is generated from the tape end detection circuit 16, and the rewind is started. It is detected that the process has been completed, and the output terminal 1-
8 and 1-9 to stop the rewinding operation, immediately output an on signal from output terminals 1-7 and 1-9, and turn on the recording/playback plunger drive circuit 13 and motor drive circuit 15. and start playback operation. The message signal is reproduced by the recording/reproducing head 9, amplified by the reproducing amplifier 8, and transmitted to the line via the telephone transformer 4 and the line switch 17.

The message signal is constantly monitored by the mark signal detection circuit 5, and when the mark signal is reproduced, a detection output is generated from the mark signal detection circuit 5, and the ON signal of the output terminals 1-7 and 1-9 is released. Stop playback operation. If there is no new remote control signal and the remote control operation is to be terminated, an on signal is output from the output terminals 1-8 and 1-9 to perform a rewind operation in order to erase the mark signal.

Here, if the rewind time is set to the time to rewind by the recording time T of the mark signal at the end of the tape,
At the beginning of the tape, the tape is rewound by nT without reaching the end of the previous message, and the mark signal can be completely erased by recording the message due to the next incoming call, whether at the beginning or end of the tape.

As described above, according to the present invention, it is possible to construct an answering machine in which a part of a mark signal for remote control does not remain or the end of a message is not missing.

[Brief explanation of the drawing]

FIG. 1 is a main part configuration diagram showing an embodiment of the present invention,
FIG. 2 is a diagram illustrating recording and erasing of mark signals in this embodiment. 1... Control circuit, 2... Incoming signal detection circuit, 3
... Capacitor, 4 ... Call transformer, 5 ... Mark signal detection circuit, 6 ... Remote control signal detection circuit, 7 ... Line relay, 8 ... Regenerative amplifier, 9 ...
... Recording/playback head, 10... Mark signal generation circuit, 1
1... Bias generation circuit, 12... Erase head,
13...Plunger drive circuit for recording/playback, 14...Plunger drive circuit for rewinding, 15...Motor drive circuit, 16...Tape end detection circuit, 17...
line switch.

Claims (1)

[Claims] 1. A remote control signal detection circuit that detects a remote control signal that arrives via a telephone line, a mark signal generation circuit, and an output of the detection circuit that detects the output of the detection circuit and performs erasing recording on the recording tape for a preset time. a recording means for immediately recording the mark signal generated by the mark signal generating means; a reproducing means for rewinding and reproducing the recording tape to the starting end after recording the mark signal; a mark signal detection circuit for detecting the mark signal; and a rewinding means for stopping the running of the recording tape when the mark signal is detected by the mark signal detection circuit and rewinding the recording tape for the recording time of the mark signal. When the recording time of the signal is T, and the ratio of the amount of rewinding at the same rewinding time at the beginning and end of the recording tape used is n (n = amount of rewinding at the beginning end/amount of rewinding at the end). , the time of the erasure recording made on the recording tape ((n-
1)×T) An answering machine characterized by the above.