WO1991002353A1

WO1991002353A1 - Record player of magnetic levitation and control type

Info

Publication number: WO1991002353A1
Application number: PCT/JP1990/000971
Authority: WO
Inventors: Tetsurou Makita
Original assignee: Tetsurou Makita
Priority date: 1989-07-31
Filing date: 1990-07-30
Publication date: 1991-02-21

Abstract

A record player of an audio system, wherein vibrations (noise and rumble) generated by the mechanical drive shaft of a turntable is completely removed and acoustic distortion and noise generated by the vibration are suppressed throughout the gamut. The turntable is levitated above the record player in a noncontact state through such processes that all the rotations and traveling motions, except the rotation of the turntable with respect to the record player around a straight line as a rotational axis passing the center (rotation center) of the circular turntable of the record player and perpendicularly intersecting the surface (plane) of the turntable, are controlled as much as possible by magnetic repulsion only, magnetic repulsion and gravity acting on the turntable, or resultant force of magnetic repulsion, attraction between an electromagnet and a ferromagnetic material, and gravity acting on the turntable, whereby the shaft and bearing of the turntable are dispensed with. A method of rotating the turntable comprises a slightly modified prior-art technique. In the case of a belt drive player, only a pulley is fixed in a position symmetrical to the driving motor with respect to the center of the turntable and driven by the motor through another pair of pulleys and lowly elastic rubber belts so that the turntable is prevented from being shifted or swung by the pulling force of the rubber belt.

Description

Detailed description

Magnetic levitation and magnetic suppression type record breaker Technical field

Regarding record / breaker of music (sound) playback device (AudioSysmt), spine: S: technology

In the conventional record-breaker, except for a part of the bonnet, the turntable has a shaft and a pedestal. However, it is necessary for the shaft and the bearing to be precisely machined in order to distort the entire sound range, generate noise, and eliminate its twisting (expenses). I was angry.

Disclosure of the invention

Rotation of the turn * table with respect to the record-breaker, where $ 3 is a straight line that passes through the center (rotation center) of the turntable circle of the record-bryer and intersects perpendicularly with the surface of the turntable (plane). Except for all rotational movements and movements (movements, vibrations) of magnetic force (preferably sandwiching the magnet surfaces of the same blade as close to each other as possible). Repulsive force and gravity applied to the turntable itself (it is desirable to make the turntable as heavy as possible), or magnetic repulsive force, electromagnet and ferromagnetic material (metal [material] that sticks to ¾5, Alternatively, the force of attraction with a magnetized ferromagnetic material or permanent magnet) and the gravity applied to the turn table itself (it is desirable to make the turn table as heavy as possible) suppress it as strongly as possible (press it down). , Fix,) Float the turntable from the record-breaker in the air without contact (in the case of the linear motor, the direct motion of the direct ♦ drive, except for the gas [atmosphere]). (Remove the shaft and bearings.) The shape of the back of the turn'table and the surface of the record 'player facing the turntable is based on the magnetic repulsion force and the gravity applied to the turntable itself. Then, make it flat, mortar-shaped, or rippled (including concentric concavo-convex shapes. See Fig. 2.] The number of waves is one or more. In the case of the above-mentioned suppression method using only magnetic repulsive force, which does not rely so much on the gravity of the turntable, it is desirable to make the shape flat. The simplest suppression method is turn-test Suppress the cylinders (true circles) that intersect with the plane parallel to the surface of the table (plane) and intersect with it perpendicularly, and whose center S ^ passes through the center of the turn'table rotation, respectively, individually or at once. Is. (Suppresses separately in the direction parallel to and perpendicular to the turn tape Λ surface.) This suppression method is performed as follows (see Fig. 1). Different ring-shaped magnets (cylindrical, plate-shaped, or a combination of both types; see Fig. 3) with opposite magnetic poles (for circular shaping). Of magnets or electromagnets and cylindrical magnets or electromagnets with different diameters, and bring them as close as possible, and strongly suppress them by magnetic repulsion force. , Repeat the sandwiching process as necessary. (No.

，：

See Figure 5. ), The magnet fixed to the turntable tilt is a permanent magnet, and the magnet fixed to the record-bryer tilt is a permanent magnet or an electromagnet. Magnetic glue, turn 'vertical movement of the table plane It is desirable that the place that suppresses is as far as possible from the ^^ line during turn table rotation, parallel to the turn table plane, and close to the plane passing through the turn ♦ table center of gravity. By doing so, the same high stability can be obtained. If the turntable is heavy, (a levitating permanent magnet is extremely necessary, economically and spatially [too large], not desirable. :)) Record for levitation 'Use an electromagnet for the magnet on the brayer side, and reduce the electric power as much as necessary until the gravity can be canceled out, and increase the magnetic force. The magnetic repulsive force, the attractive force between the electromagnet and the ferromagnet (or the magnetized υ ferromagnet, the permanent magnet, etc.) and the turn-table gravity suppression method, the turntable is strongly defeated. The magnetic force such as fifciM) of the ^ κ stone that uses an electromagnet on one side of the record breaker makes the jg separation between the turn table and the record breaker optically, and the electric circuit (electronics) ) The agate is operated by computer technology to operate the electric power of the electromagnet and keeps it constant. This is the turn-tape surface, which is? M of vertical flesh, parallel to the turn'tape surface. The repulsive force of is used to suppress the direction. (Refer to Fig. 6) Note that the turn-table square permanent magnet, ferromagnetic material, etc. In order to avoid the magnetization of the magnet, a magnet R such as a paramagnetic material that is not (i &) attached to the magnet is sandwiched and fixed () to the turntable. Permanent magnets should be molded in one piece: If the above-mentioned suppression methods are combined in two or three, and if a good effect is obtained, do so. In order to avoid the effect of magnetism, all the Alternatively, the magnet should be as far away from the turn-table surface as possible. For the same reason, the non-magnetized ferromagnetic material between the turn 'table surface and the magnet or electromagnet, or the magnetized ferromagnetic material, or the magnet, such as the barb or aluminum, does not react to the magnetism. It is desirable to make a material that blocks magnetism into a plate shape and put it in without interruption to block air. Also, all ferromagnetic materials do not attract the magnet of the magnetic cartridge (increasing needle pressure). It is desirable to keep it as far away from the table surface as possible. Alternatively, a material that does not react to magnetism, such as copper or aluminum, but that blocks magnetism, can be made into a plate shape and placed without a gap between the turn tape Λ ^ plane and all ferromagnetic materials. desirable. The magnetic shield ferromagnetic material, copper, aluminum, etc. should be made as thick as possible and the number of sheets should be increased (until magnetic influence has no adverse effect on reading information such as music). , It is desirable to increase the number of sheets.) For magnetic shutoff, the use of the above two kinds of substances is linear motor etc. Magnetic force fluctuates (commutating demon magnet, record-breaker permanent magnet *) In this case, the magnetic loss effect of both types is almost the same, so if copper or aluminum is used, the magnet of the magnetic cartridge (big 'up) will not be attracted, so it is desirable to do so. When the magnetic force does not fluctuate (DC electromagnet, permanent magnet, etc.), it is desirable to use a ferromagnetic material because it has a greater magnetic blocking effect. When the cartridge (Vicnor, Zip) does not use the piezoelectric type, the condenser type, the photoelectric type, etc., the magnetic protection measures for the magnetic cartridge (Pizuku'up. M.) Are not necessary. It seems that the rotation method of the turn table is linear motor method (direct drive method), belt drive method, idler method, etc. If a new J-movement technology is developed in the future, it will be included. In the case of the belt drive type and idler type quadrangle, the improvement means that the turntable rotation center ¾ ^ does not deviate from the rotation center of the record-bryer by pulling with a rubber belt or panel. In order to prevent the movement of the turntable, let it pass through the center of gravity of the turntable, and on the plane parallel to the turntable plane (record .player surface [plane]), It is desirable to avoid this by providing the same driving device at the same jg female (intersection point:), in the direction divided into two or more equal angles from the intersection point (center of gravity of the turntable). At that time, it is not necessary to use the same device, but it is only possible to use a pulley, an idler and a panel, or a pair of pulleys and a low elastic rubber belt from them and the motor. If all that is needed is to do so, then do so. If only one moving device is used, the above measures to prevent the turntable from slipping and shaking are not necessary. The location where the linear motor mechanism, the rubber of the belt drive 'belt is hung, and the place where the idler contacts are preferably parallel to the turn' taper plane and on the plane passing through the center of gravity of the turn * table. Inner * table-table or Tanin 'table outer circumference is acceptable. When the suppression method of only the magnetic repulsion force is used to suppress the vertical direction of the turn tape surface by sandwiching the latter number of magnets, the following procedure S is taken. If it is possible to stabilize (suppress), it is desirable to do so, the magnets on the tan 'table side are attached at equal intervals, and as the record-breaker side Di is moved downward (gravity direction), The interval is gradually narrowed. (Refer to Fig. 7) On the contrary, the magnet of the record player's side is set to the equal spacing SI, and the magnet on the turn * table side goes up (the direction opposite to the gravity direction .:). Therefore, the interval should be narrowed * (see Fig. 8), and both upper IB measures S should be performed (record. Breaker, turn-table, etc., neither! ^). And if the turn'table is more stable, it is preferable to do so (see 90,).

Simple explanation of the drawing

The magnetic levitation and restraint mechanism and the groove are separately marked to avoid complicating the drawing. (The linear'motor mechanism uses the product of the group as it is, so it is omitted.) Fig. 1 is a cross-sectional view of the most simple method of retaining by only magnetic repulsive force * Fig. 2 shows magnetic It is ¾f®, which is the most tube-like one of the repulsion method and the suppression method (levitation type) by the gravity applied to the turn table itself.

Fig. 3 is a perspective view of a plate-shaped magnet (cylindrical shape, circular shaping).

Fig. 4 is a perspective view of an example of a method to prevent slippage and blurring by pulling the rubber * belt and idler panel of the turn'table ( _β for two booleys and idlers;). The figure is a one-sided cross-sectional view of an example in which the sandwiching is returned several times by the suppression method using only the magnetic repulsive force. -No. 6 is a cross-sectional view of an example of a magnetic repulsive force, an attractive force between «a¾ and a ferromagnetic material, and a gravity suppression method applied to the turntable itself.

Fig.7, Fig.8, Fig.9 ¾… are the method of suppressing the turn-tape surface by the repulsive force of ---, magnetic repulsion. FIG. 6 is a cross-sectional view of one side of a turntable outer peripheral portion of an example of a measure for stabilizing vertical restraint.

FIG. 10 to FIG. 15 are cross-sectional views of one side of the outer circumference part of the turntable of the example of the suppressing method only by the repulsive force of the air.

Figures 16 to 20 are one-sided cross-sectional views of an example of the suppression method (levitation method) by the magnetic repulsive force and the gravity applied to the turntable itself,

1) Permanent ¾H

2) Electromagnet

3) Permanent magnet or «magnet

4) Ferromagnetic material (not magnetized)

5) Items that do not stick (do not react) to the magnet, such as paramagnetic materials

6) Turn, table

7) Record-Breaker

8) Vinyl

9) Rubber-belts

10) Boolean

1 1) Motor

1 2) Idler

1 3) Inner turn'table or turn'table

1 4) Panel

1 5) Bearing

1 6) Substances that do not react to magnetism and block magnetism, such as copper and aluminum

1 7) Non-magnetic ferromagnets, or substances that do not react to magnetism and block magnetism, such as mesh and aluminum

1 8) Non-magnetized or magnetized ferromagnetic material or permanent magnet

Claims

Claims · Recorder · Turner · Turn through the center of the circle of the tenible (center of rotation), and the turntable is the am that intersects perpendicularly with the surface of the turn'table (plane). Except for all rotational movements (movements, shaking,), only magnetic repulsion force, if magnetic repulsion force and gravity on the turntable itself, or «air repulsion The force, the attraction between the electromagnet and the ferromagnet (a metal [substance] that sticks to the magnet, or a magnetized strong magnetic substance, or the permanent magnet _β ), and the gravity applied to the turn table itself, make the transformation as strong as possible. , (Equipped with a screwdriver ¾, determine ,, :) The turn table is also record, from the record player in the air, without contact (when the linear'motor, direct'drive is motion). Let's open i ^ ap to magnetic ridge <pick-up>

, In all of the above suppression methods, all magnets or «magnets should be separated from the turn-tape Λ / ¾ surface as much as possible, and, by the same reason, turn ♦ tape Λ ¾ surface and magnet or void magnet, magnetized. A non-magnetized body or a substance that does not respond to magnetism, such as diarrhea or aluminum, but does not respond to magnetism. , And all ferromagnets should be female from the turntable Λ ¾ surface as much as possible so as not to attract the magnet of the magnetic cartridge. If you can get a good effect by combining the two, the turn table can be rotated by linear motor method (direct drive method), bell drive method, idler method, etc. If a new drive technology is developed in the future, it will also be included. The above φ-like turn'table floats in the air (rotary shaft, no bearing,) and record'breaker. And tangless tt (rubber 'pelt, idler, excluding gas. :) is a special feature, rn ^?