JPS5950650A - Automatic answering telephone set - Google Patents

Abstract

PURPOSE:To detect whether or not a tape is run and whether or not the tape is set, by monitoring whether or not the running system of tape is in operation. CONSTITUTION:When the tape is run, a reel stand is turned and a signal attended by running is generated with a Hall element provided under the reel stand. A microprocessor monitors the state when this signal is generated. When the stopping of signal is detected, it is discriminated that the tape is at the originator at the end. In setting the device to the automatic answering mode, the microprocessor commands to wind up once the tape. A counter circuit is started at the same time. When a signal is being generated from the tunning system of the tape even after a prescribed time is elapsed, the microprocessor discriminates that the tape is not set to the device.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to an answering machine.

(Structure and problems of the prior art) The conventional answering machine has a means for detecting whether or not the tape is running (rotation detecting means), and a tape presence/absence means for detecting whether or not the tape is attached to the device. A detection switch was provided, and these means were constructed completely separately, increasing mechanical complexity.

(Object of the Invention) An object of the present invention is to provide an improved answering machine that can detect the presence or absence of a tape without the need for the conventional tape presence/absence switch.

(Structure of the Invention) The present invention is an answering machine in which the conventional tape presence/absence switch can be omitted by using the same signal generation means for detecting tape running and detecting whether tape is attached. A tape that is attached to a movable part of a running system and is equipped with a signal generating means that detects the operation of the movable part and generates a signal, and a means that determines whether or not the tape is running based on the presence or absence of a signal from the means. A running detection means, a means for activating a tape rewinding means of a tape running system when the answering machine is set to the answering machine, and a means for measuring the elapsed time from the time when the tape rewinding means is activated Table 1; The present invention is characterized by comprising tape presence/absence detection means for determining that there is no tape when the signal generation means is generating a signal even if the elapsed time exceeds a certain value.

(Explanation of Examples) An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, ] is the erasing head, 2 is the recording/reproducing head, and 3 is the erasing head.
4 is a pinch ruler, 4 is a capstan, 5 is a cassette tape, 6 is a supply reel stand, and 8 is a pole element that generates pulses by changing the polarity of the magnet 7. 9 in Figure 2
1 is the Hall element shown in FIG.
), 11 is a timer activated by MPUl0 and transmits the elapsed time from the time of activation to MPU 1.0;
12 is a motor drive circuit, 13 is a regeneration plunger drive circuit, 14 is a rewind plunger drive circuit, 15 is a motor, 16 is a regeneration plunger, and 17 is a rewind plunger.

When the tape runs in modes such as playback, fast forward, and rewind, the supply reel stand 6 rotates. When the supply reel stand 6 and the magnet 7 are integrated and the Hall element 8 is placed under the magnet 7, the rotation of the supply reel stand 6 generates a rectangular wave as shown in FIG. 3. The period of this rectangular wave varies depending on the rotation speed of the supply reel table 6, and the maximum value of the cycle is, for example, 1 second. When this square wave is sent, MPUl0 determines that the supply reel is rotating,
When the square wave is sent one after another, the tape is the origin or EN
Decide that it is D.

When the device is set to the away mode, MPU10 commands the tape to be rewound to the origin. First, for example, rewind the response tape. When the rectangular wave is sent from the Hall element 9, the MPU 10 determines that the supply reel is rotating, and when the signal is no longer sent, it determines the end of rewinding the response tape, and activates the rewind plunger. Turn off circuit 14. If the tape is not loaded, if automatic rewinding is performed while the user is away, the Hall element 9 continues to send rectangular waves. The MPU10 starts the timer counter 11 at the same time as rewinding the tape, and if the square wave continues to be sent from the Hall element 9 until the timer counter [1] counts, for example, 150 seconds, it is determined that there is no tape and the rewinding plan is started. Turn off the jar circuit 14. The same operation is performed for the business recording tape. This makes it possible to always detect the presence or absence of a tape when performing a rewinding operation.

(Effects of the Invention) As detailed above, the signal generating means for generating a running detection signal attached to the movable part of the tape running system is used for both detecting tape running and detecting whether or not the tape is attached. However, whether or not the tape is attached is detected when the duration of the running detection signal during rewinding exceeds a certain period of time.
There is no need to provide a conventional tape presence/absence switch, and the mechanism is simple.

[Brief explanation of drawings]

FIG. 1(a) is a diagram showing an example of the mounting state of the cassette tape, FIG. 1(b) is a diagram showing an example of the configuration of the supply reel stand, and FIG.
The figure is an electrical wiring diagram in an embodiment of the present invention, and FIG. 3 is a diagram showing the form of a rectangular wave generated by a Hall element. 1 ・・・・・・Erase head, 2 ・・・・・・
・・・・・・Recording head, 3 ・・・・・・Pinch roller, 4 ・・・・・・Capstan, 5 ・
・・・・・・Cassette tape, 6 ・・・・・・
...Supply reel stand, 7... Magnet, 8
,9...Hall element,10...
...Microcomputer unit (MPU), 1
1......Timer, 12...Motor drive circuit, 13...Regeneration plunger drive circuit, ]4...... ... Rewinding plunger drive circuit, 15...Motor, 16.
...... Regeneration plunger, 17...
...Rewind plunger. =6-

Claims (1)

[Claims] A signal generating means attached to a movable part of a tape running system, which detects the operation of the movable part and generates a signal, and determines whether or not the tape is running depending on the presence or absence of a signal from the signal generating means. a tape running detection means for determining whether the answering machine is running, a means for activating a tape rewinding means of a tape running system when an answering machine is set to an answering mode, and a means for measuring the elapsed time from the time when the tape rewinding means is activated. and tape presence/absence detection means for determining that there is no tape when the signal generation means is generating a signal even if the elapsed time exceeds a certain value.