JPH02310880A - Tape recorder with timer - Google Patents

Abstract

PURPOSE:To surely reproduce the initialization of the action of a timer by providing a transistor switch by which the output of the timer is fetched only when a play switch is pushed at the time of setting a tape by the action of the timer. CONSTITUTION:The transistor switch theta1 is provided in a tape recorder provided with a timer device. When timer output is outputted from the timer device 3, control voltage is supplied to transistor switching circuits 8 and 10 through diodes D1 and D2 to actuate a motor 9 and a power amplifier 11. Meanwhile, the control voltage of the timer device 3 is supplied to the emitter of the transistor theta1 through the terminals (a) and (d) of a switch 6. However, positive voltage is supplied to the base of the transistor theta1 on the cathode side of the diode D5 through the terminals (a) and (c) of a switch 5, so that a current does not flow in the diode D5 and the transistor theta1 gets in an off-state. Thus, the initialization of the timer is surely reproduced by detecting the state of the play switch 4 by the transistor theta1.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tape recorder equipped with a timer device.

Prior art radio cassette tape recorders with timer devices are equipped with a timer selector switch and a function switch for switching between tape and radio.

A timer operation and a manual operation can be performed by a combination of switching the two switches.

For example, a timer is set to a desired time, and then the timer switch is turned from OFF to ON.

Furthermore, set the radio and tape selector switch to the desired position. If you want to operate the tape on a timer, set the funxilon switch to the tape position and press the play button to complete all settings. In other words, by making the settings as described above, the tape recorder operates at the desired time and the purpose is achieved.

Next, when using the timer to operate the radio at the desired time, set the timer in the same manner as the timer operation for the tape and switch the function switch to radio.

Next, let's consider simultaneous operation of tape and radio using a timer. That is, when the funk switch is set to the radio position and the play switch is pressed, the operation will be as follows. The timer output is O at the desired time.
When N is pressed, the radio will operate because the cylinder switch is in the radio position. However, since the play switch is also pressed, the audio is from the radio, but the cassette tape recorder is also operating at the same time. If the above-mentioned combination of operations occurs, the initially desired tape audio cannot be retrieved.

Problems to be Solved by the Invention However, in the conventional device, when setting the radio function by timer operation, if the tape play button is pressed at the same time, the audio output is the radio, but the tape also operates at the same time. There is no sound, but the tape is running. This is because the operation is undefined compared to the initial setting based on the original timer operation.

The present invention compensates for the above-mentioned drawbacks and provides a tape recorder with a timer that can reliably reproduce the initial setting of the timer operation.

Means for Solving the Problems The tape recorder with a timer of the present invention has a timer-equipped tape recorder that only when the play switch is pressed when setting the tape for timer operation.
This device is characterized by the provision of a transistor switch for taking out the output of the timer.

Function The tape recorder with a timer of the present invention has an auto/manual changeover switch and a tape/radio changeover switch. The auto/manual changeover switch is for switching the operation of the tape recorder between manual operation and automatic operation using a timer. The radio and tape selector switch is selected when the timer is activated, and the timer is further set by a combination of three switches including the tape play button switch.

When performing tape operation using a timer, set the desired time. Next, the tape play switch is pressed to enable tape operation, and the timer selector switch is set to the auto position. Completion of these settings ensures that the timer operates as initially set.

The effect when the user forgets to press the tape play switch at the initial setting stage will be explained.

The output of the timer device is connected to the next stage transistor switching circuit via a funxilane switch that switches timer operation between radio and tape. In this case, the 71 link switch is set to the tape position.

Further, a transistor switch is connected to the tape position of the funxilane switch.

The emitter of a PNP transistor is connected to that tape position, and the collector is connected to ground. On the other hand, the pace is connected to an auto/manual switch that changes the timer output via the tape play switch.

The base of the transistor is connected to the auto position of the switch via a resistor. Furthermore, its base is connected to ground via a resistor.

the funk silane switch is set to the tape position;
I will explain the operation when the tape play switch is pressed and when it is not pressed.

When the tape play switch is pressed, a 10B voltage is supplied to the auto side of the timer selector switch via the play switch, and a 10B voltage is applied to the base of the transistor via a resistor. If the timer output from the timer device is active in this state, the base and emitter of the transistor will be at the same potential, the transistor will not be in the OFF state, and the timer output will be supplied to the next stage transistor switching circuit to operate the tape. By turning the switching operation of the motor and power amplifier from OFF to ON, the tape operation is reliably performed by the timer.

On the other hand, if the tape play switch is not pressed,
The +B voltage is not supplied to the auto side of the timer selector switch and is not supplied to the base of the transistor, so that the timer output is output and the emitter is connected to the base of the transistor through a resistor. Even if it is supplied, the transistor is turned on, so
The timer output is connected to ground by a transistor, and is not supplied to the transistor switching for operating the next stage motor power amplifier, so that one tape operation by the timer is not possible.

That is, the present invention is characterized by the provision of a switching circuit that detects whether or not the tape play switch is pressed and outputs a timer output or not.

Embodiment Hereinafter, a radio cassette tape recorder with a timer according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 2 shows a timer considered prior to the present invention for a tape recorder.

1 is a timer device having a display device 2 and a digital clock LSI 3. 12 is a positive voltage for causing the timer device 1 to operate. 3b is a timer output terminal. The timer output terminal of this timer device 3 is normally at the brand level, and when the tire is on, the output terminal is 12
becomes a positive voltage level. The timer output is supplied to a radio tape switching function switch 6.

Furthermore, it is supplied to the and terminal of the transistor switching circuit 8 via the diode D1, and further supplied to the and terminal of the transistor switching circuit 1o via the diode D2. 9 is a tape drive motor; 1
1 is a power amplifier that amplifies the sound.

On the other hand, the tape play switch 1 is supplied with the positive voltage of 12, and the common terminal a of the timer changeover switch 5
is supplied to

pressure is supplied to the C terminal of the auto/manual switch Chiro. Since the auto/manual switch 5 is connected to the C terminal, the positive voltage of 12 is not supplied to the next stage circuit.

However, since the play switch 4 is pressed, the mechanism of the tape recorder is set in an operable state. If there is an output from the timer output terminal of the timer device 3 with these settings completed, the diode D1. D
A control voltage is supplied to the transistor switching circuits 8 and 10 through the transistor switching circuit 2, the motor 9 and the power amplifier 11 are operated, and the tape recorder is operated by a timer.

Considering the case where the timer is set but the play switch 4 is not pressed, the tape recorder mechanism is not in an operable state and the motor 9 and power amplifier 11 are not activated even if the timer output control voltage is output. It works, but there is no tape audio.

Next, the manual operation is selected by the auto/manual changeover switch 6 so as to operate regardless of the timer device, and the a and b terminals of the switch 6 are closed, allowing manual operation at any time.

That is, when the play switch 4 is pressed and terminals a and b are closed, 12 positive voltages are supplied to the transistor switching circuits 8 and 10 via the switch 4, the switch 6, and the diodes D4 and D2, and the motor 9 The power amplifier 11 operates and tape audio is output.

Next, the embodiment of the present invention shown in FIG. 1 will be described with reference to the drawings.

In FIG. 1, the symbols 1.27, 3, 4, 5, 6°8.
9, 10, 11, and 12 have been explained with reference to FIG. 2, so their explanation will be omitted. This example differs from the first example in that a transistor switch θ is provided.

The embodiment shown in FIG. 2 will be described with respect to the case where the play switch 4 is pressed and the case where it is not pressed due to the timer operation of the tape recorder.

Auto/manual switch 6 is set to auto side,
Terminals a and C are in a closed state.

Next, consider the case where play switch 4 is pressed. When there is a timer output from the timer device 3, the diode D1. A control voltage is supplied to the transistor switching circuits 8 and 1o via D2, and the motor 9
and the power amplifier 11 operates. On the other hand, timer device 3
The control voltage is supplied to the emitter of the transistor θ1 via the a and d terminals of the switch 6. However, since positive voltage is supplied to the cathode side of the diode D50 through the a and c terminals of the switch 5, no current flows through the diode D6, and the transistor θ
1 is in the OFF state.

That is, if the initial setting of the timer is performed normally, the timer operation can be accurately reproduced, the transistor θ1 is also in the OFF state, and normal operation is not affected.

Next, let's consider the case where the play switch 4 is not pressed.

When the play switch 4 is not pressed, the tape recorder mechanism is not operating, and positive voltage is not supplied to the a terminal of the auto/manual switch 6, and is also supplied to the e terminal on the auto side. Not done. In other words, the pace of transistor θ1 is the diode D
5. It is connected to the ground via the resistor R2°R1, and automatically turns on when a positive voltage is applied to the emitter.

If the control voltage is output from the timer device 3, the timer output control voltage is supplied to the emitter of the transistor θ1 through the a and d terminals of the switch 6, and the transistor θ1 is turned on, so that the timer output is grounded. become.

Therefore, the control voltage of the timer output is not at the ground level, and the transistor switching circuit 8.10 does not operate and remains at 1. Motor 9. Power amplifier 11 also does not operate.

The operating state of Sibley switch 4 is determined by transistor θ1.
By detecting this, you can reliably reproduce the initial settings.

Effects of the Invention As described above, the present invention can reliably reproduce the initial settings of the timer by detecting the state of the Sibley switch using a transistor.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a tape recorder with a timer according to the present invention, and FIG. 2 is a block diagram of a conventional tape recorder with a timer. 1... Timer device, 2... Display device,
3...Digital clock LSI, 4...
・Tape recorder play switch, 6... Auto/manual changeover switch for timer, 6.
...Function switch for selecting timer-operated tape and radio, 7.....Tuner, 8.
10...Transistor switching circuit, 9.
...Tape recorder drive motor, 11...
...Power amplifier for audio amplification. Name of agent: Patent attorney Shigetaka Awano and 1 other person5-
Auto F=Air A/

Claims (1)

[Claims] A timer device, an auto/manual changeover switch, a radio/tape changeover switch, and a control electrode provided between the tape position of the radio/tape changeover switch and ground, and a control electrode connected by the auto position voltage of the automanual changeover switch, A tape recorder with a timer, comprising: a transistor switch operated so that the output of the timer device is taken out only when a tape play switch is pressed and the tape recorder is in an operable state.