JPH0132233Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a tape recorder with a radio, and particularly relates to an auto-sleep mechanism.

Conventionally, in a cassette-type tape recorder with a radio, if the selector switch is set to the radio position and the tape recorder is in a driving state (playback or recording state), power is supplied to the radio while the tape is running, and when the end of the tape is reached. A so-called auto-sleep mechanism is used, which automatically cuts off the power supply to the radio when the tape recorder is switched to a non-driving state by a well-known automatic stop device. There are devices that can be used as radio listening or recording timers, but in such conventional auto-sleep mechanisms, the switch for operating this mechanism is separate from the tape recorder's operation button system (or The power switch also serves as the power switch for the entire device), making it difficult to operate and requiring an additional operating switch.

This invention was made to eliminate these drawbacks, and its feature is that when the end of the tape is reached in the tape recorder, the power to the entire device is automatically cut off, and the operation status of the tape recorder (playback For those with a so-called full silent off structure in which the recording setting state (or recording setting state) is maintained in the same state, an auto-sleep mechanism is provided with a simple configuration by adding an operation function of the auto-sleep mechanism to the playback button. An object of the present invention is to provide a new auto-sleep mechanism for a tape recorder with a radio, in which a playback button has a control function for the radio.

An embodiment of this invention shown in the drawings will be described in detail below.

The figure is a circuit configuration diagram of the auto-sleep mechanism of this invention.A transistor Tr and its bias circuit 2 are connected to the reproduction power line formed between the amplifier 1 and the power supply B as shown in the figure. A switch S11 (for example, a combination of a Hall element and a relay switch, which is configured to be closed when the tape is running and opened when the tape is stopped) is controlled to open and close depending on the tape running state between the tape and the ground. Connect in parallel a series circuit of a radio (AR) and a tape recorder (TP) with a selector switch _S3 as shown in the diagram and a normally closed contact switch _S2 that opens when the playback button is pressed. , Furthermore, a series circuit consisting of a radio circuit 3, a tape drive motor 4, and a switch S12, which is controlled to open and close together with a switch _S11 depending on the tape running state, is connected in parallel between the collector of the transistor _Tr and the ground air. This is what I did.

The auto-sleep mechanism of this invention has the above-mentioned configuration, and the operation of this circuit will be explained below.

First, when the selector switch _S3 is set to the tape recorder (TP) side, the bias circuit 2 is not connected to the ground, so the transistor Tr is also in an inactive state, so current from the power supply B is supplied to the motor 4. Not done.

In this state, when the playback button of the tape recorder is operated, switches _S11 and _S12 are closed, so the bias circuit 2 is connected to the ground by switch _S11 , the transistor Tr is operated, and the motor 4 is supplied with power. A power supply current is supplied from B, so that a tape running state is obtained.

When the running of the tape stops due to the arrival of the end of the tape, the stop of tape running is detected and switch _S11 is activated.
and S ₁₂ is switched to the open state, thereby disconnecting the motor 4 from the earth, and also disconnecting the bias circuit 2 from the earth, making the transistor Tr inactive. , which cuts off the supply of power supply current to the motor 4, and as a result,
A state in which the power is cut off while the playback button is operated (set to the playback state), that is, a full silent off mode is obtained.

Next, when the selector switch S ₃ is set to the radio (AR) side, the bias circuit 2 is connected to the ground through the selector switch S ₃ - switch S ₂ , the transistor Tr operates, and conduction occurs between the emitter and collector, and the radio Power supply current from power supply B is supplied to circuit 3, and the radio becomes in an operating state (ON state).

In the radio listening state described above, the automatic sleep mode can be achieved by operating the playback button of the tape recorder to obtain a tape running state.

That is, when the playback button of the tape recorder is operated, the switch _S2 is opened, but _S11 and _S12 are switched to the closed state, so the bias circuit 2 is connected to the ground by the switch _S11 , and the transistor Tr is connected to the ground. Since the motor 4 operates, the power supply current B continues to be supplied to the motor 4 and the radio circuit 3.

Therefore, an auto-sleep mode is obtained in which the radio can be listened to while the tape is running.

When the running of the tape stops due to the arrival of the end of the tape, the stop of tape running is detected and the switch S ₁₁ is activated.
S ₁₂ is switched to open, which causes motor 4 to open.
is cut off from the ground, and the bias circuit 2 is also cut off from the ground, causing the transistor Tr to become inactive and supplying current to the radio circuit 3, motor 4, and amplifier 1. As a result, when the playback button is pressed, the power supply to the entire device is cut off while the playback mode is set, and the radio is automatically turned into a non-operating state (OFF state). The so-called auto-sleep function can be achieved by simply operating the playback button.

Now, if you want to cancel the auto-sleep mechanism and listen to the radio on a device that is in a fully silent off state (the power is cut off when the playback button is pressed) due to the operation of the auto-sleep mechanism described above, you can turn off the tape recorder. If you press the stop button and release the play button (return to original position), switch S ₂ returns to the closed state and bias circuit 2 is switched to switch 3 and switch S ₂
The transistor Tr can be connected to the ground through the ground, and the transistor Tr can be operated to supply power to the amplifier 1 and the radio circuit 3.

As mentioned above, in this invention, a tape running state is obtained by operating the playback button of a tape recorder, and when the tape reaches its end from this tape running state and is brought to a tape running stop state, The tape recorder with a radio has a full silent off mechanism configured to cut off the power while the operation state of the playback button is maintained, and the radio and tape recorder have a power supply supplied to the motor of the radio and the tape recorder, a control means provided between the motor and the power supply for controlling the power supply to the motors of the radio and tape recorder; It supplies power to the motor of the radio and the tape recorder, and opens when the tape reaches its end from the tape running state and comes to a tape running stop state, cutting off the power supply to the motors of the radio and tape recorder via the control means. a first switch, a selector switch provided in parallel with the first switch for selecting between a radio and a tape recorder, and a selector switch provided in series with the selector switch that is normally closed and opened by operating a playback button. and a third switch installed in series with the motor of the tape recorder and controlled to open and close together with the first switch. From the tape running state obtained by operating the button, closing the first and third switches, opening the second switch, and supplying power to the motors of the radio and tape recorder through the control means,
When the tape reaches its end and is stopped, the first and third switches are opened to cut off power supply to the motors of the radio and tape recorder via the control means. With this structure, the playback button can also be used as a selector switch for the auto-sleep mechanism, and the auto-sleep mechanism and full silent off mechanism can be combined with a simple configuration, which is convenient in practice. have an effect.

[Brief explanation of drawings]

The figure is a circuit diagram of an auto-sleep mechanism that is an embodiment of this invention. Explanation of symbols, B...Power supply, Tr...Transistor, 1...Amplifier, 2...Bias circuit, 3...
Radio circuit, 4...Motor, _S11 , _S12 ...Tape running state sensitive switch, _S2 ...Playback button interlocking switch, _S3 ...Radio/tape recorder selection switch.

Claims (1)

[Scope of utility model registration request] A tape running state is obtained by operating a playback button on a tape recorder, and when the tape reaches its end from this tape running state and is brought to a tape running stop state, the operating state of the playback button is maintained. A tape recorder with a radio having a full silent off mechanism configured to cut off power at any time, the tape recorder being provided between a power supply supplied to the motor of the radio and tape recorder, and the motor of the radio and tape recorder and the power supply. a control means for controlling the power supply to the motors of the radio and tape recorder; and a control means that is closed by operating a playback button of the tape recorder, and supplies power to the motors of the radio and tape recorder through the control means, and runs the tape. a first switch that opens when the tape reaches its end and stops running, and cuts off power supply to the motor of the radio and tape recorder via the control means; a selector switch provided in parallel with the switch for selecting between the radio and the tape recorder; a second switch provided in series with the selector switch, which is normally closed and opened by operating the playback button;
A third switch is provided in series with the motor of the tape recorder and is controlled to open and close together with the first switch, and when the radio is selected by the selector switch and the playback button of the tape recorder is operated, The third switch is closed, the second switch is opened, and power is supplied to the motors of the radio and tape recorder through the control means. From the tape running state obtained, the tape reaches its end and the tape running is stopped. For use in a tape recorder with a radio, characterized in that the first and third switches are opened to cut off the power supply to the radio and the motor of the tape recorder via the control means when the power is removed. Auto sleep mechanism.