DE3046712A1 - TURNTABLE ARRANGEMENT - Google Patents

Description

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The invention relates to a turntable assembly and to improved components for turntables.

For a long time it was believed that all improvements made to the elements of the turntable structure of a turntable could be made, only a better functioning of the mechanics in the area of the pickup system would result. Recently, however, it has been shown that the turntable has improved in this sense can be that he gets a more complete information out of the record. '

The music information on a record is in the serpentine lines locates the sound groove that spirals inward on the record; the serpentine lines are a mechanical analogue of the waveforms originally, when recorded, by the instruments emitted into the surrounding air and then picked up by a microphone, wherein the ultimate goal is to transfer them from the vinyl record to the turntable system without the slightest change to let pass. The stylus vibrates mechanically in exact accordance with the groove deflections; this mechanical vibration is converted into an electrical signal within the pickup body, which is fed to the turntable preamplifier. From it it follows that any mechanical vibration that is not part of the information in the sound grooves is picked up by the stylus and inserted into the

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Playback system is directed. For this reason, of course, the isolation of the stylus is against External mechanical vibrations are paramount when designing a turntable. In other words: the stylus may only play the sound groove, not the actual record or the surface of the Turntable or the chassis; just as little is it allowed through its acoustic environment, through speaking Sound energy released into the air by people passing by, by vibrations in the engine and suspension etc. can be influenced. These performance criteria have so far been few of the manufacturers of turntables have been taken into account, and they have neglected the most important source of external mechanical vibrations: the record itself.

Vinyl is an excellent means of storing information in the form of deflections within a spiral running groove; however, the process of playing the record calls for some of the peculiarities of this Material caused serious side effects. When the stylus when scanning the groove deflections is accelerated in the lateral and vertical directions, forces on the order of 1000 g are generated. All materials have a natural resonance, which is excited when sufficiently high energy is supplied can, and vinyl is a very living material in that regard. Much of the brittle harshness in modern music systems is actually due to the fact that the pickup scans these mechanical vinyl resonances produced by the pickup needle itself.

Vinyl is also an elastic material, as a result

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has that energy carried into the material is absorbed for a period of time and then for a period of time is released again. The one disadvantage is that there is a transient response from the stylus is played and a shock wave is transmitted into the record. The transient process is audible and its return echo can also be heard because the vinyl releases the stored shock wave after a while. One serious acoustic effect is a blurring and smearing of all musical details because of this The process continues for as long as the record is playing. Because of the liveliness and The elasticity of the vinyl of the record is acoustic energy in the room that permeates the air and acts on the Record hits (mostly by speakers, actually but originating from all noises and sound events in the room), reflected or stored by the vinyl and passed on to the stylus as an undesired vibration. So there are more Smearings of details that usually go hand in hand with roaring bass.

Warping of the vinyl disturbs the stability of the entire playback system, initially leads to a distortion of the pitch of the music in the sound grooves, which is deformed by the warping are, and leads overall within the entire playback chain to considerable problems with frequencies that be below the listening frequency. Warping also causes part of the record to be exposed in the air, thereby causing it their susceptibility to suggestions of all kinds is considerably increased.

So only the one contained in the sound groove

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Information is sampled, the sound groove of the Plate to be insulated? in other words: the sound groove must be isolated from all vibrations that act on it can be transferred from any part of the turntable.

The invention is therefore based on the object of an improved To develop a turntable assembly which does not have the disadvantages mentioned above.

The invention also aims to create a device in which the pickup needle is undesirable mechanical vibrations in the vinyl of the record and against undesired vibrations in the turntable system is isolated.

These objects are achieved in one embodiment by providing a device on the turntable by which the record is lifted a little in the label field, and by placing a device on the spindle is attached, with which a pressure is exerted on the label field in order in this way an even pressure distribution to be achieved over the entire sound groove area of the record. This causes the vinyl resonances steamed; Furthermore, the vinyl as a storage element is thereby switched off, rather the stored energy is passed to the mat, which comes in intimate contact with the vinyl because of suction caused by one underneath the negative pressure generated by the record is caused. Because the vinyl is under too much tension to be could respond noticeably to external energy, the transmission of sound energy through the vinyl to the

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The stylus is tied and there is none Warping the record more on. Thus, the sound groove is isolated and the stylus can only sample the information in the sound groove.

The present invention thus relates to a disc player assembly comprising; a spindle, one Plate, which is rotatably arranged on the spindle, a mat on the plate to hold a record, which has a label field on its top and bottom and a playback area provided with the sound groove, over which a stylus can run, a device located under the record that is limited to the label field of the record and lifts the record in its center, and one on the Spindle mounted above the record for applying a pressure force to the edge of the label field on the top of the record, so that the playback area provided with the sound groove on the underside in absorbent contact with the mat, causing vibrations in the record to enter the mat and no longer onto the Pickup needle are transferred.

The invention also provides to suppress unwanted vibrations in the entire turntable area; the The invention therefore also provides improvements for certain components of the disk player arrangement.

A turntable platter is generally made of metal and always has a large surface area that covers it whole generally makes it very susceptible to resonance and mechanical vibrations. Most turntables are operated to dampen the plate of a mat.

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It is an aim of the invention to make the plate inherently free of resonance.

The invention therefore relates to a turntable platter with the following individual features: a circular one Main part made of a stiff metallic material with a flat surface to hold the record and a downwardly directed circumferential wall part extending from the surface, grooves in the circumferential wall part and a vibration-absorbing material in the groove, which acts as a wave trap for vibrations caused by the metal body hike.

The spindle that carries the plate usually rests on its part on a support bearing, which is arranged on the main part of the turntable. In some cases the spindle is arranged on a printing piece. When the latter bends, there is a vertical movement of the entire plate of very small dimensions, which means that the stylus scans a signal below the audio frequency: rumbling noises arise.

The invention provides a tip made of extremely hard material at the lower end of a spindle; the tip rests on a pressure piece made of ceramic material, which is also extremely hard; this results in vertical movements of the Spindle avoided. Because of the hardness of the material, there is no wear and tear on this pressure piece. Warehousing also has bushes made of extremely hard plastic, so that there is a perfect fit between the spindle and Storage results. When using such a plastic material there is almost no friction, which is extremely important

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for the relief of the engine 1st and also constantly ensures smooth rotation of the spindle in the bearing. This material does not make any noise but instead absorbs all vibrations that could be caused by the rotation processes, and derives it into the sub-chassis. This absorption of vibrations naturally makes a significant contribution to isolate the sound groove, because it helps to prevent mechanical vibrations coming from outside cannot get to the record and thus to the stylus.

The invention thus relates to a bearing arrangement for record players, comprising: a housing with an open end and in the housing a cavity, - the through a cylindrical inner wall and a lower end wall is defined; a spindle arranged axially in the housing, the upper end of which protrudes from the housing and takes a turntable there; a tip made of hard, wear-resistant material that is firmly attached to the lower end of the spindle Material; a pressure piece arranged on the lower end wall of the housing for receiving the tip, which is made of hard, wear-resistant material; and vibration absorbing means between the spindle and the cylindrical housing wall for maintaining the axial position of the spindle in the cavity.

The basic purpose of a turntable suspension is to provide a mechanical filter against the outside To form vibrations; in other words: all vibration energy with above the frequency of the tuned suspension lying frequency is prevented from penetrating the playback system. In general, it is all the more advantageous

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the lower the tuning frequency of the suspension: the closer to 0 Hz, the less energy can that occurs in the environment affect the turntable.

The invention therefore also relates to an improved suspension, in which the center of gravity of the entire floating arrangement is at exactly the same height as the Points at which the turntable sub-chassis is attached to the suspension assembly.

In the turntables known today, the attachment points of their suspension springs are in one whole different height than the center of gravity of the playback system. There is also a wide vertical distance between the Center of gravity of the moving mass and the spring attachment points; the latter therefore represent fulcrums in order to which the entire subgroup can fluctuate acoustically. That is of course not possible with the suspension according to the invention, because the center of gravity and the spring attachment points coincide. In other words, the entire floating subset is inherently stable, so it can be very little affected by bumps such as people walking near the Shelf or table on which the turntable is placed, and also by fluctuations caused by Rotation can be generated.

The invention also relates to and relates to a suspension system for receiving a turntable sub-chassis on: a plurality of suspension devices, each an upper case with a means for mounting of the sub-chassis; one vertically through each

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Housing extending rod; a spring assembly one end of which is suspended from the rod; and means for the absorption of vibrations in which one part is suspended from the lower end of the spring assembly, while a second part supports the upper housing in order to decouple the spring assembly from the sub-chassis.

In a preferred embodiment of the invention, the springs are effective from the housing supporting the sub-chassis decoupled with the help of two different materials. The carrying nylon liner is the primary insulator between the springs and the floating assembly; however, the nylon bushing is also detached from the top of the spring housing (i.e. the sub-chassis bracket) is insulated by a layer of foam rubber. The latter is in connection with the carrier made of nylon is an effective barrier that prevents the passage of all vibrations occurring in the springs themselves into the sub-chassis. In addition, the foam rubber cushions the upper part of the spring housing that supports the sub-chassis. On the other hand, the foam rubber layer actually represents another "spring", which in connection (in series) works with the main spring, but in the other direction: the main spring acts by stretching in the downward direction, while the foam rubber acts upwards as a result of compression. The combination of these two modes into a double-acting The spring works very effectively and in turn makes a significant contribution to isolating the sound groove The invention works with a spring support rod extending from the upper end of the spring housing and the sub-chassis adjustment and leveling from above is possible, very different from other turntables where the Base plate bottom must be removed and an extremely tedious and time-consuming adjustment of the internal Springs is required. It also results in usual

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Turntables of this type adjust the suspension by compressing and stretching the springs; through this the suspension tuning will of course be changed in an unpredictable manner. With the turntable at hand the entire spring assembly is raised or lowered by turning the spring support rod for leveling, without the springs being compressed or stretched. This of course has the consequence that the leveling the suspension has no influence on the tuning of the suspension.

The invention also relates to a sub-chassis for receiving a turntable for a record player; this sub-chassis has an even layer structure with a plurality of arm extensions which are intended to cooperate with suspension devices for the turntable and are held by them; the layer structure consists of a plurality of metal layers between which there are vibration-absorbing connecting layers.

Acoustic performances that can be achieved with a turntable arrangement according to the invention are: better intelligibility, increased dynamics, droning-free mid-range bass, bass control and stretching, improved Responding to transient processes without any sharp accentuation, smooth and stepless balance control of deep bass to extreme highs, accurate image without exceptional focus, natural depth ratio (depth perspective), transparency, no blurring of position and a new measure of audibility of calm between strong tones.

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Further features and possible uses of the invention emerge from the following description of preferred embodiments of the invention. The associated Drawings represent:

Fig. 1 is a perspective view of a turntable assembly according to the invention, some not details essential to the invention have been omitted for the sake of clarity of the drawing;

Figure 2 is a top plan view of the disc player assembly of Figure 1;

FIG. 3 is a side view partially cut along line 3-3 of FIG. 2; FIG.

FIG. 4 shows a modified form of the spacer according to FIG. 3;

Flg. Figure 5 shows a modified form of the vibration absorbing device in the suspension arrangement according to FIG. 3.

In Figs. 1 to 3, a turntable assembly is with reproduced the essential components of the invention. The record player has a base plate 10 with two rear, upright hinge straps 12 to which a cover 14 is pivotably articulated. At the front At the edge of the base plate 10 is a plate 16 on which the front part of the cover 14 can rest. This gives the turntable arrangement a ventilation when the lid is closed, because the lid is at a distance

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from the base plate 10. Base plate IO and cover 14 exist preferably made of acrylic plastic or another plastic.

The turntable assembly also has a sub-chassis 18, which has a large planar part and a Series of projections shows, to which three extension tubes 20, 22 and 24, a pickup extension arm 26 and a spirit level arm 28 belong. The three extension arms 20, 22, 24 each have a circular opening, with which they rest on associated suspension devices 30, 32, 34 and encompass them.

The record player arrangement includes a plate 35 for receiving and playing a record 38 by means of a pickup 36; the record is divided into a playback area 40 with a sound groove and a label field 42 (see Fig. 3). Apart from its outer edge, the record lies over a mat 46, which in turn rests on it the top of the plate 35 is located.

The plate 35 is mounted centrally on a spindle 48; a shoulder 50 is formed on the spindle on which the Plate rests on it. The lower portion of the spindle 48 is received in a bearing 52, the lower part in a Opening 54 in the base plate 10 protrudes.

A cone-shaped component 56 is located above the record and is connected to the spindle by means of a button 58 connected, which is screwed onto the upper part of the spindle 48. With the conical component is the button by a spring clip 59 on the lower part of the button shaft

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tied together. A small ring 60 is intended to lift the record in its center; in the embodiment shown, the ring is located between the record and the mat and is so large that it does not protrude beyond the label field. Of course that could be lifting with one Spacer ring are made, which is located between the mat and the plate 35, or simply by means of a higher-reaching zone formed on mat 46 or plate 35. In the case of the one shown in FIG The spacer ring 60 is a modified embodiment beveled to support the suction between the mat and the record.

Now the individual components are to be described in more detail and their meaning explained, which they for the weakening of vibrations, which in the known systems of this type usually affect the stylus of the pickup arm be transmitted.

An essential feature of the invention is the exclusion of vibrations caused by the record itself on the Pickup needle are transferred. The outer edge 62 of the conical component 56 touches the record 38 approximately on the outer edge of the label field 42 of the plate. Turning the knob 58 on the spindle applies pressure exerted on the record 38, which is held in its center by the spacer ring 60 raised. By the Action of a uniform force on the edge of the label field of the record in the direction against the support element 60 the entire playing surface, i.e. the sound groove area 40 of the record, is pressed against the mat 46. The sound groove area 40 actually adheres to the mat under suction, because under the saddle as a result of the

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applied pressure a negative pressure is generated. The mat should therefore be flat and not have any protruding ribs, so that no air pockets can arise under the plate; such air pockets would in turn get into resonance and stimulate the vinyl above them. In turn, the mat should be made of a material that clings to vinyl to keep vibrations in the vinyl before they can be transferred to the stylus. The diameter of the mat is slightly smaller than that of the record, so that the thickened edge 64 of the record does not have its outer area lifts up in the air. The end result is the entire sound groove area of the record because of the applied Pressure against the elasticity of the vinyl in intimate contact brought with the mat. As mentioned above, this results in attenuation of the vinyl resonance itself by adding the Vinyl as a storage medium is turned off by the transmission of sound energy through the vinyl to the stylus and by practically eliminating any warping.

The conical component 56 has a plurality of openings 65 to allow air to circulate under the cone and prevent air from being trapped under the component.

The plate 35 of the turntable must be precision machined and is preferably made of a magnesium Al uminiura alloy, due to its rigidity and strength is achieved at the same time. The plate is designed as a flywheel, with the majority of the mass at the edge 44 is concentrated (see Fig. 3); the kinetic energy of the

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rotating flywheel overcomes the instability, which is thereby introduced into a turntable that the pickup needle scans a transient process. if If the stylus goes through a wide transient process, the force generated is so great that a lighter one Plate is temporarily slowed down; servo control is useless with this type of instability because it would apply the fix after the error occurred.

Record players made of metal and with a large surface area are susceptible to resonance and mechanical vibrations. The plate according to the invention is in contrast to known arrangements in which the mat is used to dampen the plate is used, preferably provided with two parallel circumferential grooves on its side wall,!: the bands 66, 68 are inserted from a foam compound; the bands act as a wave trap for any vibration, which penetrates the metal of the plate. These bands feed in connection with the alloy used a plate that shows less resonance than the currently known systems. Comparable results are natural to be achieved if the plate is equipped with one or more than two grooves, with foam rubber or one other damping material are filled.

The turntable has an internal flange 70 around which a belt 72 is guided, which leads to a on the Motor attached to the base plate (not shown) leads.

The spindle 48 is made of high strength steel that is inside A specified tolerance is precisely machined and has experienced a special chrome plating of the surface, so that

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a particularly good hardness value of approximately 70 Rockwell degrees of hardness results. The lower edge of the spindle has a circular opening in which a spherical tip 74 is firmly attached; the tip is preferably made of tungsten carbide, an extremely hard material. The spherical tip 74 rests on a pressure piece 76 made of wear-resistant, extraordinarily hard (about 93 Rockwell degrees of hardness) ceramic material, for example the material known under the trade name Amlox-68, because absolutely no "yielding" must occur in this part of the turntable. As mentioned above, if the pressure piece could bend, there would be a very slight vertical movement of the entire platter, and the stylus would interpret this as a signal (rumbling) below the audio frequency. The combination of a carbide tip with a ceramic pressure piece significantly reduces wear on the pressure piece. The spindle 48 rests with its lower part in a cylindrical pressure housing 78 which is attached to the sub-chassis 18 with a press fit or in some other way and the upper flange part of which rests on the upper side of the sub-chassis. This lower spindle part is held vertically aligned in the pressure housing 78 by means of two bushings 80, 82, which are preferably made of nylon. If self-lubricating nylon is used, as it is commercially available under the name OILON-PV-80, there is almost no friction, which is just as important for relieving the load on the motor as it is for smooth running of the spindle in the bearing. In absolute contrast to normal bushings, this material does not produce any noise but actually absorbs all vibrations that could be caused by the rotation process and guides them into the sub-chassis. This vibration absorption contributes

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very essential to the isolation of the sound groove, because it helps that coming from the outside mechanical Vibrations do not get into the record and from there into the stylus. Another feature of this Type of bushes is their self-lubricating property.

The pressure piece 76 can be replaced if necessary by the lower end wall 77, which is fixed to the housing with screws 79, is removed.

The "suspension" component of the turntable assembly will be described with reference to the suspension assembly 34 of Figure 3; the other two suspension arrangements 30 and 32 naturally have the same structure and properties. The suspension assembly 34 includes a spring housing having an upper part 100 in the form of an inverted cylinder with an opening 102 in the upper Top wall; The shaft part 110 of an adjusting knob 104, which has a threaded connection with it, enters through this opening a threaded spindle 106 has. A shoulder 108 is formed on the outer wall of the upper housing 100 which the sub-chassis arm 24 rests on. The shaft part 110 is provided with a thickened lower part 112 on which a nylon ring 114 rests. The upper end of a spring 116 is carried by the nylon ring 114, and its lower The end receives a second nylon ring 118. The special shape of the spring prevents rocking in the resonance frequency, as it is a property of a cylinder spring, or a linearity error as it is with conical springs occurs.

In another embodiment shown in FIG. 5, there is a rubber ring 120 between one

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Nylon support 121 and the inner shoulder 122 of the spring housing 100. This foam rubber, together with the nylon support, forms an effective barrier which prevents all vibrations from the spring itself from passing into the sub-chassis. The foam rubber also cushions the spring housing assembly and sub-chassis bracket. This rubber layer also acts as a further "spring", which works in conjunction with the main spring, but in a different direction: the main spring works by stretching in the downward direction, the rubber spring works by compressing it in the upward direction. The combination of these two working methods contributes significantly to the isolation of the sound groove.

The lower part of the spring support rod 106 is in a foot part 120 screwed in, which can be adjusted by hand in order to be able to level the base plate. The rod 106 penetrates also the lower portion 123 of the suspension housing.

In a? Embodiment of the invention is the sub-chassis 18 a layer construction with four layers 124 made of magnesium-aluminum alloy, between which three layers a binder, such as an epoxy resin, that is attached to the metal layers by applying very high pressure is connected so that an arrangement is formed that is both rigid and neutral at the same time. This is very important because the sub-chassis has an area that is susceptible to vibrations. This is counteracted by the three inner binder layers that mutually decouple the four metal layers and therefore act as a barrier act against vibration transmission. These binder layers also serve to absorb and destroy

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Vibrations. This creates a sub-chassis of very high rigidity that is also very sound-absorbing is. The geometry of the sub-chassis is important. The surface area must be kept as small as possible, because any extensive surface acts as a membrane, while at the same time most of the mass is around storage must be concentrated in order to absorb and dissipate all vibrations from the bearing. The mass distribution of the sub-chassis is generally very critical.

End of description.

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Claims (35)

DR.-ING.WALTER ABITZ DR. DIETER F. MORF DIPL.-PHYS. M. GRITSCHNEDER patent attorneys ^{iU December 198} ° POKtanachrlrt / Post »! Addron » P.O. Box 86Ο1ΟΘ, 8OOO Munich 86 I'H-nzemuierstraU «28 Τι'Ιΐ'Γοη 98U2 22 ΤοΙβκΓΗΐηηιρ: Chnmindua Munich T ₁ -UX (0) 5 23998 RIEN 1 Marcel RIENDEAU 2561 Portland Boulevard Sherbrooke Quebec / Canada Turntable arrangement Patent claims: Record player arrangement, characterized by - a spindle (48), - One rotatably arranged on the spindle (48) Plate (35), - A mat (46) on the plate (35) for receiving a record (38), which has a label field (42) on its top and bottom and a playback area (40) provided with a sound groove over which the pickup needle runs, OUHÜ / I L RIEN 1 - One located under the record (38) and limited to the label field (42) of the record (38) Device for lifting the record (38) in its central area, - A device mounted on the spindle (48) above the record (38) for exerting pressure on the edge of the label field (42) on the top of the record (38), around the one with a sound groove to bring the play area (40) provided on the underside into absorbent contact with the mat (46), whereby vibrations in the record (38) are transmitted to the mat (46) instead of to the stylus can be. 2. Record player arrangement according to claim 1, characterized in that that the pressure-exerting device is designed as a conical component (56) whose Outer edge (62) rests on the outer edge of the label field (42) of the record (38). 3. Record player arrangement according to claim 2, characterized in that that the conical component (56) has a centrally arranged head (58) which on the one end of the spindle (48) is screwed to remove the pressure exerted by the record (38) on the mat (46) to adjust. 4. Record player arrangement according to claim 1, characterized in that that the device for lifting the record (38) has a spacer (60) in its central area - 2 ORIGINAL INSPECTED RIEN 1 between the record (38) and the mat (46). 5. Record player arrangement according to claim 4, characterized in that that the spacer (60) is beveled. 6. turntable arrangement according to claim 2 or 3, characterized in that the conical component (56) with openings (65) is provided, which allow air to circulate through the component (56) and over the top of the Allow label field (42). 7. record player arrangement according to claim 1, characterized in that that the turntable (35) has a circumferential edge (44) that in this edge (44) Grooves are cut and that a vibration-absorbing material (66, 68) inserted into the grooves serves as a wave trap for vibrations that migrate through the turntable (35). 8. Record player arrangement according to claim 7, characterized in that that the turntable (35) made of a magnesium-aluminum alloy is made. 9. turntable arrangement according to claim 7, characterized in that that the vibration absorbing material RIEN 1 (66, 68) consists of open-cell foam rubber. 10. Record player arrangement according to claim 1, characterized by a base plate (10) on the base plate (10) attached suspension devices (30, 32, 34), one of the suspension devices (30, 32, 34) supported sub-chassis (18), a bearing (52) suspended from the sub-chassis (18) and having a housing (78), which rotatably receives part of the spindle (48). 11. Record player arrangement according to claim 10, characterized in that that on the lower end wall (77) of the housing (78) a pressure piece (76) made of hard, wear-resistant Material is arranged, and that the lower part of the spindle (48) at its lower end has a spherical tip (74) which rests on the pressure piece (76) and is made of hard, wear-resistant Material. 12. Record player arrangement according to claim 11, characterized in that the pressure piece (76) consists of a Ceramic material and that the tip (74) consists of tungsten carbide. 13. Record player arrangement according to claim 10, characterized characterized in that the suspension (34) comprises a housing of an upper part (100) and a separate one therefrom has lower part (123), and that the sub-chassis (18) ORIGINAL INSPECTED RIEN 1 is suspended from the upper part (100), which further a rod (106) extends through the suspension housing (34) and the base plate (10), and that a spring arrangement with its one end carried by the rod (106) and with the other end the upper part (100) carries. 14. Record player arrangement according to claim 11, characterized by a vibration-absorbing device between said other spring end and the upper part (100) of the suspension housing (34). 15. Record player arrangement according to claim 12, characterized in that that the vibration-absorbing device is a nylon support (121) on attached to the other end of the spring (116), and a layer of foam rubber (120) between the nylon support (121) and the upper part (100) of the suspension housing, and that the spring (116) is in a downward direction acts by stretching, while the foam rubber (120) acts in the upward direction by compression. 16. Record player arrangement according to claim 12, characterized in that that the other end of the spring (116) is flared outwards and the diameter of the spring (116) at said one end is less than the diameter at said other end, and that the nylon support (121) is bevelled at its inner edge in order to accommodate the expansion of said other end Juiu / I RIEN 1 adapt the spring (116). 17. Record player arrangement according to claim 11, characterized characterized in that the rod (106) has a threaded part (104th) screwed thereon, with which the Height of the upper part (100) of the housing (34) for leveling the sub-chassis (18) can be adjusted can. 18. Record player arrangement according to claim 13, characterized in that the rod (106) one under the Base plate (10) reaching threaded part with a screwed-on foot part (120) to the height of the To be able to adjust the base plate (10). 19. Record player arrangement according to claim 10, characterized characterized in that the sub-chassis (18) has a layer structure composed of a plurality of layers (124) of magnesium-aluminum alloy shows, which are separated from one another by layers of a binder, so that a rigid and neutral unitary component results, and that the binder layers lead to mutual decoupling of the alloy layers and act as barriers against the transmission of vibrations. 20. Suspension system for supporting a turntable sub-chassis, marked by - 6 ORIGINAL INSPECTED RIEN 1 a) a plurality of suspension arrangements (30, 32, 34), each having an upper housing part (100) on which the sub-chassis (18) is received can be, b) a rod (106) extending vertically through each housing, c) a spring (116) one end of which is suspended from the rod (106), and d) means for vibration absorption having one carried by the lower end of the spring (116) Part and a second part supporting the upper housing (100) to remove the spring (116) from the sub-chassis (18) to decouple. 21. Suspension system according to claim 20, characterized in that the spring (116) is bell-shaped is, wherein the turns at said one end have a smaller diameter than the turns at said lower end, and that the spring (116) winds with a diameter on a central portion has, which increases slightly towards the lower end of the spring. 22. Suspension system according to claim 20 or 21, characterized in that the vibration absorbing means comprises a bracket (121) mounted on the lower end of the spring (116) and a layer of foam rubber (120) between the other end of the Bracket (121) and the upper housing part (100), wherein the foam rubber layer cushions the housing OUHU / I L B * μ ■ m «* · RIEN 1 and acts as a compression spring. 23. Suspension system according to claim 20 or 21, characterized by a nylon ring (114) between said one end of the spring (116) and the rod (106). 24. Suspension system according to claim 20 or 21, characterized by means on the rod (106) for adjusting said one end of the spring (116) 25. Suspension system according to claim 20 or 21, characterized by a level adjustment device (120) at the foot of the rod (106) for adjusting the height of the base plate (10) on which the suspension devices (30, 32, 34) are attached. 26. Suspension system according to claim 24, characterized by a lower housing (123) resting on the base plate (10) rests, the rod (106) through the lower housing (123), the base plate (10) and the level adjustment foot (12O) is performed. 27. Storage for a turntable, characterized by a housing (78) which is open at the top and which has a cavity defined by a cylindrical inner wall and a lower end wall (77), one in the housing (78) ORIGINAL INSPECTED RIEN 1 axially arranged spindle (48) with a spindle (48) arranged axially out of the housing (78) with a from the housing (78) protruding upper part which receives a turntable (35), one on the lower End of the spindle (48) firmly attached tip (74) made of hard, wear-resistant material on the lower end wall (77) of the housing (78) arranged, the tip (74) receiving pressure piece (76) made of hard, wear-resistant material, and vibration-absorbing Means between the spindle (48) and the cylindrical wall of the housing (78) for axial mounting of the spindle (48) in the cavity. 28. Storage according to claim 27, characterized in that the pressure piece (76) made of ceramic material and the tip (74) consists of tungsten carbide. 29. Storage according to claim 27 or 28, characterized in that the vibration-absorbing device is formed by two nylon bushings (80, 82) placed at the top and bottom of the cavity are. 30. Storage according to claim 27 or 28, characterized in that the tip (74) is spherical and is firmly inserted into an opening at the lower end of the spindle (48). 31. Sub-chassis to accommodate the turntable of a OUHU / IZ. RIEN 1 Record player, characterized by a flat layer structure with a plurality of extension arms (20, 22,24), those with suspension devices (30, 32, 34), which are assigned to the turntable, cooperate and are carried by them, wherein the layer structure consists of a plurality of metal layers (124) between which vibration-absorbing Binder layers lie. 32. sub-chassis according to claim 31, characterized in that that the body can be extended by another '(28) which protrudes beyond the area occupied by the turntable (35) and the leveling to facilitate the construction. 33. Platter, characterized by a circular body (35) made of rigid metal with a flat top? surface for receiving the record (38) and with a circumferential edge (44) from said surface is directed downwards, by grooves in the edge part and by arranged in the grooves vibration absorbing Material (66, 68) that is intended to act as a wave trap for vibrations that pass through the metal body (35) hike. 34. Turntable according to claim 33, characterized in that the body of the turntable (35) consists of a magnesium-aluminum alloy consists. - 10 - ORIGINAL INSPECTED · * # ■ m ■ * - 11 - RIEN 1 35. Turntable according to claim 33 and 34, characterized in that the edge (44) is thick-walled , so that the majority of the mass of the turntable (35) is gathered at its outer edge. - 11 -