JP3364824B2 - Record player - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a record player having a turntable for rotating a record board, and more particularly to a record player suitable for a DJ to play like a musical instrument.

[0002]

2. Description of the Related Art A conventional record player simply reproduces and listens to music recorded on a record board. Therefore, in the conventional record player, it is required that the turntable be stably rotated at a constant speed (usually 33 · 1/2 rpm or 45 rpm). Various proposals have been made (Japanese Patent Application Laid-Open No. 55-93502), a structure in which a turntable is floated by magnetic force (Japanese Patent Application Laid-Open No. 54-12803).

[0003]

The record player of the present invention is completely different in concept from the conventional record player whose sole purpose is to reproduce the sound, and it is only necessary to appreciate the reproduced sound. Instead, it is for operating the record player like an instrument and creating new sounds with your own hands. In recent years, a special mixer called DJ mixer has been used to arrange and mix sounds and stereo signals from multiple sound sources such as record boards and compact discs (CDs), and create your own original mixed sound. Has become widely practiced, and those who operate the mixer and perform
is called. When arranging a song by operating the mixer, the DJ can turn the record board by hand, change the rotation speed of the record board and rub the record needle with the record needle to generate a sound effect (scratch). The technique called "," is used to create the original mix sound by making full use of various techniques such as suddenly changing the song being played to a new song.

In the conventional record player, all such operations are performed by hand, and considerable experience is required to generate a desired sound effect, and the turntable can be freely controlled by a simple operation. There has been a demand for a record player capable of producing a desired sound effect. Therefore, the object of the present invention is completely different from the conventional record player that stably rotates at a constant speed, and freely controls the rotation of the turntable with a simple operation to generate an original sound by playing like an instrument. Providing a record player that can

[0005]

In the present invention, a microcomputer (hereinafter referred to as a microcomputer) and a PLL (Phase Locked Loop) synthesizer are combined to control the rotation of a motor for driving a turntable. It achieves the purpose. FIG. 1 is a diagram for explaining the concept of the present invention, which enables accurate and stepless rotation speed control of the turntable and switching of the rotation direction by a combination of a microcomputer and a PLL synthesizer. In this figure, two PLL synthesizers are used.
By using this machine, more accurate rotation control of the turntable is performed, but this PLL synthesizer can be used as one machine.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will now be described in more detail with reference to the drawings. FIG. 2 is a plan view showing an example of the record player of the present invention, and FIG. 2 is a view showing a state before attaching the arm of the record player 1 and a device attached to the arm. Reference numeral 2 is a turntable, and reference numeral 3 is a pitch control fader for continuously changing the rotation speed of the turntable. When the pitch control fader 3 is slid upward, the rotation of the turntable becomes slow, and when it is slid downward, the rotation becomes fast. Reference numeral 4 is a pitch fader range in which the maximum adjustment range of the rotation speed of the pitch control fader 3 can be switched stepwise, and in this example, it is instantly switched to three steps of ± 3%, ± 6%, and ± 12%. It is possible to generate a delicate sound during performance.

Reference numeral 5 is a pitch bend range, and reference numeral 6 is a stick controller. The stick controller 6 is operated by tilting a rod-shaped manipulator in four directions of up, down, left and right. By tilting it up and down, the rotation speed of the turntable is finely adjusted (in this example, tilting it up slows down the rotation speed. However, it is set so that it can be made faster by tilting it downwards. It can be greatly adjusted by tilting left and right (in this example, within ± 50% range, tilting to the left increases the rotation speed, and tilting to the right slows it down. Can be set). The maximum range of rotation speed when the stick controller 6 is tilted in the vertical direction can be changed stepwise by the pitch bend range 5, and in this example, ± 1%, ± 2%, ± 3% and ± 6% There are four levels.

Reference numeral 7 is a reverse switch. When the switch is off, the turntable rotates in the positive direction, and when this switch is turned on, the turntable rotates in the reverse direction. Reference numeral 8 is a motor-off switch. When this switch is turned on during performance (while the turntable is rotating), all control of the turntable is released, and the turntable continues to rotate due to inertial force, but naturally stops, but the rotation speed. The method of damping can be adjusted by touching it lightly with your hand. Reference numeral 9 is a quartz lock switch. When this switch is turned on, L is irrespective of the positions of the pitch control fader 3 and the stick controller 6.
The ED (reference numeral 32 in FIG. 3) lights up, and the rotation speed of the turntable is constant (33 · 1/2 rpm or 45 rp).
locked in m). Reference numeral 10 denotes a pitch meter, which digitally displays the speed adjustment status of the turntable 2 by operating the pitch control fader 3 and the stick controller 6. This display method is
Of course, analog display is also possible. Reference numeral 11 is a start / stop switch for starting or stopping the rotation of the turntable, and reference numerals 12 and 13 are the rotation speeds of the turntable, 33.1 / 2 rpm and 45 rpm, respectively.
It is a switch for fixing to.

FIG. 3 is a schematic block diagram of the control circuit of the record player of FIG. In FIG. 3, reference numerals 2 to 1
3 represents the same thing as FIG. Further, reference numeral 20 is a microcomputer, reference numeral 21 is a motor for driving the turntable 2, reference numeral 22 is a slit plate attached to the rotation shaft of the motor 21, and reference numeral 23 is an optical sensor.
Reference numeral 24 is a forward rotation driver for the motor 21, reference numeral 25
Is a reverse rotation driver for the motor 21, reference numerals 26 and 29
Is a low pass filter (LPF), and 27 is a synthesizer IC for motor control. And
Reference numeral 28 is a voltage controlled oscillator (VCO), reference numeral 30 is a synthesizer IC, reference numeral 31 is a reference oscillator, reference numeral 32 is a light emitting diode (LED) driver, and reference numeral 33 is a display driver for the pitch meter 10.

The signal set by the pitch control fader 3 is first input to the microcomputer 20. Next, a signal is sent to the synthesizer IC 30 connected to the reference oscillator 31 and returned to the synthesizer IC 30 through the low pass filter 29 and the VCO 28, and the frequency instructed by the microcomputer 20 is always looped to be constant (PL
L-1). On the other hand, the signal from the microcomputer 20 and the PLL-1
A signal from the motor control synthesizer IC 27 is inputted, and the low pass filter 26 causes the drivers 24 and 25 to drive the motor 21 at a set pitch to rotate the turntable 2.
At this time, the slit plate 22 and the optical sensor 23 attached to the rotation shaft of the motor 21 are used to constantly return the signal of the actual rotation speed to the synthesizer IC 27 for control (PLL-2). The signal is always the microcomputer 2
It is also managed by being fed back to 0.
It controls LL. The pitch set by the pitch control fader 3 is displayed on the pitch meter 10 by the microcomputer 20 through the display driver 33. (In this example, digitally displayed in 0.1% steps)

The signal set by the stick controller 6 is input to the microcomputer 20 and is calculated in the microcomputer 20 so as to be adjusted to the rotational speed set by the stick controller 6, and thereafter, in the case of the pitch control fader 3 described above. Similarly, the rotation speed of the turntable 2 is controlled. The pitch fader range 4 and pitch bend range 5 can be switched with the fader variable width,
Bend variable width value (signal sent to microcomputer 20)
Is performed by changing the calculation method in the microcomputer 20. When the reverse switch 7 is turned on, the input signal passes through the microcomputer 20 and the normal rotation driver 24
To the reverse rotation driver 25 side. Further, when the motor off switch 8 is turned on, two control transmissions from the microcomputer 20 to the PLL are stopped, and the motor 21 that rotates the turntable 2 becomes free. The signal input from the quartz lock switch 9 acts so as to ignore the pitch control fader 3 and the stick controller 6 in the microcomputer 20, and the rotation speed of the turntable 2 is 33.1 / 2.
A command for adjusting to rpm or 45 rpm is transmitted to the motor 21 through the PLL.

It is not necessary to use a special device as the device such as the microcomputer or the synthesizer IC used in the above-mentioned embodiment, and a commercially available device may be appropriately selected and used. In the above embodiment, the pitch control fader 3, the pitch fader range 4, the pitch bend range 5, the stick controller 6, the reverse switch 7, the motor off switch 8, the quartz lock switch 9 and the pitch meter 10 are integrated with the record player 1. Although it was configured, all or part of these operators are unitized and configured separately from the main body,
You can also enable remote control. Also,
It is also within the scope of the present invention to connect a plurality of record players with connectors so that they can be operated simultaneously. It is needless to say that the above-mentioned embodiment describes one example of the present invention, and the present invention is not limited to the above-mentioned embodiment.

[0013]

As described above, the record player of the present invention has a completely different concept from the conventional record player whose sole purpose is to reproduce sounds, and it is possible to operate the record board without touching it. The rotation speed and rotation direction of the turntable can be freely controlled by a simple operation. Therefore, DJs who have experienced even ordinary people
Similar to the above, it is possible to generate desired sound effects by rubbing the record board and the record needle, making it possible to play the record player like an instrument and create original sound. It has a very remarkable effect as it opens a new field in the usage of.

[Brief description of drawings]

FIG. 1 is a diagram illustrating the concept of the present invention.

FIG. 2 is a plan view showing an example of a record player of the present invention.

FIG. 3 is a schematic configuration diagram of a control circuit of the record player of FIG.

[Explanation of symbols]

1 record player 2 turntable 3 Pitch control fader 4 pitch fader range 5 pitch bend range 6 stick controller 7 Reverse switch 8 motor off switch 9 Quartz lock switch 10 pitch meters 11 Start / Stop switch 12, 13 rotation speed fixed switch 20 Microcomputer 21 motor 22 Slit plate 23 Optical sensor 24 forward rotation screwdriver 25 Reverse rotation driver 26, 29 low pass filter 27,30 Synthesizer IC 28 Voltage controlled oscillator 31 Reference oscillator 32 LED driver 33 display driver

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G11B 3/60 G11B 19/02-19/06 JISST file (JOIS)

Claims (6)

(57) [Claims] 1. A record player equipped with a turntable capable of freely controlling a rotation speed and a rotation direction .
Rotation of the turntable by the micro computer
Control the turntable rotation.
As a workman, the rotation speed of the turntable changes continuously
Pitch control fader to turn while playing
Motor with the function to release all control of the table
Turn the switch off and adjust the tilt of the stick
Equipped with a stick controller that controls the rotation of the bull
A record player characterized by that. 2. A turntable can be rotated in both forward and reverse directions.
The record player according to claim 1. 3. The rotational speed of the pitch control fader
The feature is that the maximum adjustment range of
The record player according to claim 1 or 2. 4. An operator for controlling rotation of a turntable is provided.
The structure according to claim 1, wherein the structure is integrated with the main body.
Record player described in either. 5. An operator for controlling rotation of a turntable is provided.
Characterized by being unitized and configured separately from the main body
The record player according to claim 1. 6. A plurality of record players can be connected at the same time.
Any one of claims 1 to 5, characterized in that
Record player described there.