JPS6235193Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape recorder with a radio that is operated by a sleep signal and an auto signal from a timer.

In general, in conventional tape recorders with a radio, whether the switch is switched to the radio side or the tape side, those circuits operate when the time is set in advance with a timer in auto mode, and the playback mode is activated for a predetermined time using a timer. The device is configured so that during the so-called sleep period, the radio or tape can be played during that time. However,
In this case, if the sleep operation is performed while the tape is being played, the power to the tape playback circuit will be cut off after a predetermined time has elapsed with the pinch roller and capstan still in pressure contact.
This is unfavorable in terms of maintaining the performance of the tape mechanism of the tape recorder. Of course, in order to solve this problem, it is possible to provide a special plunger and operate this plunger at the end of the sleep operation to restore the play button of the tape mechanism, but in this case the cost will be considerably high, so it is not possible to use the popular type. The problem is that it is difficult to apply to products.

This invention prevents the performance of the tape mechanism from deteriorating by blocking the sleep signal from the timer when the radio tape selection switch is switched to the tape side, and preventing sleep operation in tape mode. It provides a tape recorder with an attached tape recorder.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is a terminal to which an H level signal (sleep signal) is supplied from a timer (not shown) for a preset time, and 2 is a terminal that continues to be at an H level after the time set in advance by the timer. Terminals 3 and 4 to which the signal (auto signal) is supplied
is a power supply terminal to which DC power +Vcc is applied, 5 is a radio receiving circuit, 6 is an audio circuit that commonly processes the output signals of the radio receiving circuit 5 and the tape playback circuit (not shown), and 7 is a motor for driving the tape. , 8
is a plunger for releasing the pause button, TR ₁ to _{TR 6} are transistors, R and C are resistors and capacitors that constitute a time constant circuit connected between the base and emitter of transistor TR ₅ , D is a diode, and S _{1- 1}
S _1-2 is a changeover switch that switches between the radio reception circuit 5 and the tape playback circuit in conjunction with each other, and S _2-1 and S _2-2 are operation switches that close in conjunction with operation buttons such as play, fast forward, and rewind. It is.

In the above configuration, first, the changeover switch S _1-1 ,
The operation when _S1-2 is switched to the r side, that is, the radio side, will be explained.

When a sleep signal (H level signal) is applied to terminal 1, transistors TR ₁ and TR ₂ are turned on during the period when the sleep signal exists, and power +Vcc is supplied to audio circuit 6 and radio receiving circuit 5, and the radio is activated. is played. When the sleep signal is cut off after a preset time has elapsed, the transistors TR ₁ and TR ₂ are turned off, and the power to the radio receiving circuit 5 and audio circuit 6 is cut off.

On the other hand, when the time set by the timer arrives, terminal 2
When the auto signal is applied to the transistor
TR ₃ and TR ₂ are turned on, and radio playback is performed in the same way as in the sleep mode described above. At this time, switch
Since _S2-2 is open, the motor 7 and plunger 8 are not driven.

Next, the operation when the changeover switches S _1-1 and S _1-2 are switched to the t side, that is, the tape side, will be explained.

At this time, the operation switches S _2-1 and S _2-2 are closed because the play button, etc. _is pressed to play the tape, and therefore the transistors _are The power supply +Vcc is applied to TR ₆ , and this transistor TR ₆ is turned on.

Therefore, even if the sleep signal is supplied to terminal 1, transistors TR ₁ and TR ₂ remain off,
Power is not supplied to either the tape playback circuit or the audio circuit 6.

On the other hand, when the auto signal is supplied to the terminal 2, the transistors TR ₃ and TR ₂ are turned on, power is supplied to the audio circuit 6 via the operation switch S _2-1 and the transistor TR ₂ , and the changeover switch is turned on.
Power is also supplied to the tape playback circuit via _S1-2 . In addition, since the transistor TR ₃ is turned on, the transistor TR ₄ is also turned on and the motor 7 rotates, and furthermore, the transistor TR ₅ is turned on for a time determined by the resistor R and the capacitor C, and the plunger 8 is activated, causing a temporary stop. The state is canceled and the tape is played back.

As described above, the present invention operates when the switch means for switching and supplying power to the radio receiving circuit and the tape reproducing circuit is switched to the side, and the power is supplied to either the radio receiving circuit or the tape reproducing circuit. Since the device is provided with a circuit means for blocking a sleep signal from a timer inputted to a power supply control circuit that controls on/off the power supply, there is no sleep operation in the tape mode. Therefore, even if the user accidentally sets the sleep operation state after switching the switch means to the tape side and setting the auto operation state, the sleep operation will not occur in this tape mode and the pinch roller and capstan will not be pressed together. This solves the problem of deteriorating the performance of the tape mechanism by leaving it for a long time. Furthermore, since there is no need to install a special plunger, the cost is low, which is extremely advantageous when used in a popular product.

[Brief explanation of the drawing]

The drawing is a circuit diagram of an embodiment of the present invention. 1...Sleep signal input terminal, 2...Auto signal input terminal, 3, 4...Power terminal, 5...Radio receiving circuit, 6...Audio circuit, 7...Motor, 8...Plunger, TR ₁ ~ TR ₆ ...Transistor.

Claims (1)

[Scope of utility model registration request] a radio reception circuit, a tape playback circuit, a switch means for switching and supplying power to these two circuits, a timer for outputting a sleep signal during a preset time and an auto signal at a preset time; a power supply control circuit that controls on/off the power supplied to the radio reception circuit and the tape playback circuit according to the sleep signal and auto signal from the timer; A tape recorder with a radio, comprising circuit means for blocking a sleep signal from the timer that is supplied to the power supply control circuit.