JPS6230167Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved remotely controlled automatic record player system.

A conventional automatic record player system (hereinafter simply referred to as record player system) controlled by remote control is constructed as shown in the block diagram of FIG. 1 is a remote control transmitter; 2 is a remote controller that receives a signal from the remote control transmitter 1 and generates a control signal; 3 is an automatic record player (hereinafter simply referred to as record player); It not only generates a control signal to the record player 3, but also generates a control signal to an amplifier that amplifies the output of the record player 3. In FIG. 1, signals other than control signals to the record player 3 are indicated by D. These control signals include a power on/off control signal for the record player system, and a so-called play cut signal, which is a control signal for stopping the play of the record player 3, that is, the play of the record midway through. Needless to say, the power on/off control signal is a signal for turning on and off the power of the record player system, and this signal turns on and off the power of the record player system. The play cut signal is a signal for lifting the tone arm of the record player 3 from above the record disc and positioning the tone arm above the arm rest. This signal causes the tone arm to move until it is located above the arm rest.

Furthermore, infrared rays or the like are used for the control signal from the remote control transmitter 1.

In such a record player system, remote control is possible regardless of the state of the record player. However, when the power is turned off, the tone arm of the record player falls.

Therefore, if the tone arm is not above the record, for example when the record has finished playing and is being moved to the armrest, if the power is accidentally turned off remotely, the tone arm will fall off the record. Also, when the tone arm was placed on a record, the tone arm remained in that position.

The present invention has been developed in consideration of the above, and it solves the above drawbacks and continues to apply power until the end of the predetermined operation even when the power is turned off. To provide an automatic record player system controlled by remote control which stops playing a record and moves a tone arm to an armrest when

This purpose, according to the present invention, includes a flip-flop circuit that is set in response to a power-on signal from a remote control transmitter and reset in response to a power-off signal; a relay circuit for on/off control; a detection means for detecting whether or not the tone arm of the record player is positioned above the armrest; an output signal when the tone arm is not located above the armrest; This is accomplished by prioritizing the output signal of the means over the power-off signal from the flip-flop circuit.

The present invention will be explained below with reference to examples.

FIG. 2 is a circuit diagram of an embodiment of the present invention. In FIG. 2, 2 and 3 indicate a remote controller and a record player, respectively, as in the case of FIG. etc.

4 is a receiving circuit that receives a signal from a remote control transmitter and outputs a positive pulse to terminal A in response to a power-on command from the remote control transmitter, and a positive pulse to terminal B in response to a power-off command; and 5 and 6
is Noah Gate. A flip-flop circuit (hereinafter referred to as FF circuit) 11 is formed by NOR gates 5 and 6.
It consists of FF circuit 11 is A of receiving circuit 4
It is set by the output pulse of the B terminal and reset by the output pulse of the B terminal. The output Q of the FF circuit 11 is applied through a diode 7 to the base of a transistor 8 constituting a drive circuit for a relay 10 for switching on and off the power supply. Transistor 9 constitutes a drive circuit for relay 10 together with transistor 8, and amplifies the output of transistor 8 to directly drive relay 10. The contact 10-1 of the relay 10 is connected in series with the power supply 15 of the record player system.
Turn 5 on and off.

On the other hand, the armrest of the record player 3 is provided with a switch 16 for detecting whether or not the tone arm is positioned above the armrest. This switch 16 may be a mechanical switch such as a limit switch, or an electronic switch using a photo couple or the like. This switch 16 generates a high potential output when the tone arm is positioned on the armrest, and generates a low potential output when it is not positioned.

Output E from switch 16 is applied to inverter 12. The output of the inverter 12 is amplified by the transistor 13 and applied to the base of the transistor 8 through the diode 14.

In addition, the output of the transistor 13 and the B of the receiving circuit 4
The output of the terminal, ie, the reset input of the flip-flop circuit 11, is input to an AND gate 17, and the output of the AND gate 17 is input to the record player 3 through a diode 18 as a play cut signal. On the other hand, the C terminal of the receiving circuit 4 is a terminal from which a high potential output is generated by a play cut operation from a remote control transmitter. The output of the C output terminal is applied to the cathode side of the diode 18 through the diode 19 and inputted to the record player 3 as a play cut signal.

Although the transistor 13, diodes 18, 19, and AND gate 17 are provided in the remote controller 4 in FIG. 2, they may also be provided in the record player 3.

In the circuit of this embodiment configured as described above,
When a command to turn on the power is issued from the remote control transmitter, the receiving circuit 4 generates a positive pulse at the A terminal. The FF circuit 11 is set by the positive pulse generated at the A terminal, the FF circuit 11 latches this positive pulse, and its output Q becomes a high potential output. Keep it on. Therefore, the relay 10 is energized and the relay contact 10-1 of the relay 10 is maintained in the on state to apply the voltage of the power supply 15 to the record player system.
Diodes 7 and 14 operate similarly to an OR circuit, and their operation in this case is independent of the signal from switch 16.

Also, when a play cut command for the record player is issued from the remote control transmitter, the receiving circuit 4
A high potential output is generated at the C terminal of the record player 3 through the diode 19. Then, the record player 3 raises the tone arm and moves the tone arm until it is positioned above the armrest.

On the other hand, a case will be described in which a command to turn off the power is issued from a remote control transmitter.

Ignoring AND gate 17, I will explain it first. In this case, it is assumed that the tone arm is not located above the armrest. Receiving circuit 4
B due to a command to turn off the power from the remote control transmitter.
A positive pulse is generated at the terminal, and this positive pulse causes
The FF circuit 11 is reset and latched, and the output Q of the FF circuit 11 becomes a low potential output. However, since the tone arm is not currently on the armrest, the switch 16 is producing a low potential output E. Therefore, this output E is inverted by the inverter 12 and output from the inverter 12 as a high potential output. Transistor 13 is then turned on, and the output from inverter 12 is amplified and applied to the base of transistor 8 through diode 14, keeping transistors 8 and 9 on. Accordingly
The relay 10 continues to be energized in priority to the power off signal from the output Q of the FF circuit 11, and the relay contact 1
0-1 remains on, and the voltage of the power supply 15 continues to be applied to the record player system. Then, when the tone arm is moved and positioned on the armrest, the switch 16 makes its output E a high potential output. Therefore, this output E is inverted by the inverter 12 and becomes a low potential, and the transistor 13 is turned off, and the output through the diode 14 becomes a low potential output. On the other hand, since the output Q of the FF circuit 11 is a low potential output, the transistors 8 and 9 are turned off, and the relay 10 is turned off. Then, the contact 10-1 of the relay 10 is turned off, and the application of the voltage of the power supply 15 to the record player system is cut off. Therefore, even if a command to turn off the power is issued from the remote control transmitter while the tone arm is moving outside the record, the tone arm will not fall outside the record, and it will not turn off when the tone arm is on the record. Even if a command is issued from the remote control transmitter, the tone arm does not remain in the position above the record, and the power supply 15 is applied until the record is completely played and the tone arm is positioned on the armrest. Become.

However, from the time the power off command is issued, it is not possible to stop playing the record and move the tone arm until it is positioned above the armrest, and the tone arm cannot be moved until the tone arm is positioned above the armrest, and only after the entire record has been played. Do not move it to a position on the armrest.

However, due to the existence of the AND gate 17, the AND gate 17 is opened by the output from the transistor 13 when the tone arm is not located above the armrest, and at this time, a command to turn off the power is issued and the B of the receiving circuit 4 is The positive pulse of the output from the terminal is output from the AND gate 17, and the signal from the AND gate 17 is input to the record player 3 as a play cut signal, so the tone arm of the record player 3 is lifted with the power off command and starts playing the record. The performance stops at that point and moves until it is positioned on top of the armrest.
When this movement is completed, that is, when the tone arm is positioned on the armrest, the power to the record player system is cut off as described above.

Next, when the output Q of the FF circuit 11 becomes a low potential output, that is, when a command to turn off the power is issued from the remote control transmitter, if the tone arm is located above the armrest, the transistor 1
Since the output of transistor 3 is a low potential output, the output Q of FF circuit 11 immediately turns transistors 8 and 9 off, and relay 10 becomes de-energized.
Then, the contact 10-1 of the relay 10 is turned off, and the voltage application of the power supply 15 to the record player system is immediately cut off after receiving the power-off command from the remote control transmitter.

Note that diodes 7, 14, 18, and 19 are for blocking backflow.

As explained above, according to the present invention, a detecting means is provided which detects whether or not the tone arm is positioned above the arm rest and outputs the output to a relay circuit that turns on and off the power of the record player system. Since the relay circuit is kept in the power-on state by the output from the detection means when the device is not located on the armrest, the power-off command is given priority over the power-off command from the remote control transmitter. No matter what time the command is issued, the tone arm will not fall outside the record.
Also, the tone arm will no longer be left on the record. Furthermore, since the AND signal of the signal from the detection means when the tone arm is not located on the armrest and the power off signal is used as the play cut signal, the power is turned off when the tone arm is not located on the armrest. When the power-off command is issued, the tone arm is immediately lifted and moved to be positioned above the armrest, and the playing of the record is stopped because the tone arm is immediately lifted after the power-off command is issued.
Power to the record player system is cut off when the tone arm is moved and positioned on the armrest. Therefore, the performance will not continue until the end of the entire performance of the record due to a command to turn off the power.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional remote-controlled automatic record player system. FIG. 2 is a block diagram of an embodiment of the present invention. 1...Remote control transmitter, 2...Remote controller, 3
...Record player, 4...Reception circuit, 10...
...Relay, 10-1...Relay contact, 11...
FF circuit, 12... Inverter, 15... Power supply,
16...Switch, 17...And Gate.

Claims (1)

[Scope of utility model registration request] In an automatic record player system controlled by remote control, a flip-flop circuit is set in response to a power-on signal from a remote control oscillator and reset in response to a power-off signal from a remote control oscillator; A relay circuit for controlling power on and off of the system, and detecting whether or not the tone arm of the record player constituting the automatic record player system is positioned above the armrest and applying an output to the relay circuit. detecting means for activating the relay circuit with an output when the tone arm is not positioned above the arm rest and maintaining the power supply in the on state; a detection means for resetting the flip-flop circuit; a gate circuit that performs an AND operation with the output from the detection means when the tone arm is not positioned above the armrest, and outputs the output as a play cut signal; An automatic record player system characterized in that a signal for activating the relay circuit and keeping the power source on has priority over a signal for turning off the power source from the flip-flop circuit.