JPS5819704A - Tone arm construction for record reproducer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tone arm structure of the type used with a sound reproduction device such as a record reproduction device.
m assembly). To be more specific,
The present invention provides an extremely balanced tonearm structure that is capable of tracking significantly distorted record surfaces without causing distortion.

Conventional bit support tie (pivoting-type)
The middle part of the tone arm structure e) is usually used for a record playback device (phonograph assembly).
y) has an elongated arm member attached to the support housing by the bidet. pickup cartridge
A cartridge and needle arrangement is attached to one end of an elongated arm, and a counterweight is adjustably attached to the other end of the arm.

ing. Pivot connect the arm to the housing assembly (21
) This allows the needle to move both vertically and horizontally as necessary when tracking a distorted record surface. highfibrity
ty) In order to reproduce sound, it is important to have the needle accurately follow each peak and depression formed on the surface of the record. When the stylus deviates from the normal tracking position of the record surface, a certain amount of distortion occurs, and the magnitude of this distortion (1) is directly proportional to the size of the stylus produced. Therefore, in the prior art,
Intercondyle occurs in which the tone arm must be balanced on the I/Coco surface so that the needle can move as freely as possible relative to the peaks and depressions of the record surface.

Early BiJ? ) 7) Support/Eve tone arm support structure 1d, a always employed individual independent support slides to control the vertical and lateral movement of the tone arm relative to the record surface. For example, it has often been done to form one or both of the independent support mechanisms with one north, knife, and bar (simple IJ-bar (22) material). However, the support mechanisms of such counts are sufficiently (satisfactorily) to the extent that it is practically impossible to prevent the support mechanisms from influencing each other. It is known that the support mechanism controlling the lateral movement is not
The support mechanism that controls vertical movement tends to impede the tonearm's free movement in the vertical direction, and as a result, the support mechanism that controls the vertical movement tends to impede the tonearm's free movement in the vertical direction, resulting in one chord. This resulted in an overall reduction in the fibrity of the sound reproduced from the . Furthermore, such independent support (
Since the structure of the 9 structure is generally complicated, maintaining the tone arm in a balanced state for a long period of time requires
It was difficult, if not impossible.

Overcoming the above problems when using multiple bearing mechanisms,
5, a single unit that can support the tone arm both vertically and horizontally with respect to the record surface? , UniPivotBearing
It has been proposed that the entire tone arm ÷ 1 binary body be balanced and supported by the qssembly. In order to balance and support the tone arm above the support housing, in the conventional technology, the pivot point of the Univipo+, l-011 receiving elbow 4 is placed at the bottom of the tone arm. The so-called beam-balanced mounting system 11 is located vertically upward.
alance munting as assembly
) was considered to be a form of power (Iyo de/). If such If4 is achieved, the pivoting movement of the tone arm generates a restoring force that returns the tone arm to its initial balanced state. It was considered to be stable in both vertical and horizontal planes. actually,
Due to the pitch movement of the tone arm, the tone arm structure is displaced toward the rising end, and there is a fi direction that causes the center of gravity f to wander back to its initial position. However, in such a beam-balanced mounting system, there is a problem with the distortion that occurs during vertical movement of the tonearm. The main side is the vertical direction of the needle.

The disadvantage of interfering with King's 11 is that the needle is deflected from the normal tracking point.

In contrast to such instruments, the sound played from the record produces distortion, thereby reducing the frequency of the tone arm structure.

Achieving beam balance by positioning the bit point perpendicularly above the center of gravity of the tonearm provides some lateral or lateral stability to the tonearm. In particular, the rolling motion in the direction of the tone arm structure generates a restoring force that attempts to return the p, ) -y arm to its proper position.

A typical example of such a beam-balanced, unipivot-supported tonearm is U.S. Pat. No. 5.25, issued to Nutanton on January 25, 1966.
There is a tone arm structure disclosed in No. 1,283. This US patent clearly states that the pivot point is located vertically above the plane passing through the center of gravity of the tone arm, and furthermore, this (25) plane d: between the center of gravity of the balance weight and the herad shell (head shell).
It is defined as extending through the center of gravity of d 5hell ). This US patented device? Since beam balance occurs when the tone arm is
Either or both of these movements will produce a shift proportional to the magnitude of the movement. Since these forces try to return the tone arm to its original position, they have a negative effect on the desired tracking force acting on the button. When the tonearm described in the above-mentioned U.S. patent is tracking on a distorted record surface, the relatively large vertical movement of the tonearm causes the tonearm to move away from its initial position. A significant opposing restoring force is generated. Although this US patent provides the tonearm with the desired lateral balance, the overall tonearm structure is Satisfying work! It will not be possible to do this.

(26) The inventor determined that the pivot point of the UniPig bearing assembly is
Tonearm subassembly II
If possible, position the top and bottom of the tone arm so that they match the virtual horizontal njj that intersects the heavy knob b of the sub-assembly and extends orthogonally to the axis that connects the head felt rear balance weight. It has been found that the directional tracking movement does not cause a significant restoring force. Via 1 in the vertical direction while the tone arm tracks the record surface? When performing a horizontal pick-up, only the vertical force acting on the tone arm is a force, which is determined selectively by the placement of the rear balance weight.

Another solution to the problem of trying to get the right balance is shown in U.S. Pat. No. 4,113,265, issued September 12, 1978 to Iyeta; suggests the use of a pair of side balance weights to control the lateral or lateral swing of the tonearm.

In this American state of mind, is Balance Weight Happy Month? Since it is arranged on the 7''11 side of the throat point, there is a tendency to significantly increase the number of arms.

Furthermore, the inertial force of the ton arm j・jl! '+1- Since it is the product of the square of the distance from the point and the quality of 1°1, the balance weight attached to the front LJ7 described in this US/M permit generates an excessive level of twitching force. There is a tendency to Historically, in this seven U.S. permit, the lateral balance weight d
-, there is a drawback that when the tone arm tracks the distorted record surface in the direction of the stop, the tone arm rotates around the 1#l+ line in the longitudinal direction. This phenomenon reduces the wear of the record and the stylus, and also reduces the channel thickness 11 between the left signal and the right signal No. 4N, resulting in a reduction in the stereo effect from the speakers.

The inventors (2) designed a laterally disposed tonearm to provide sufficient lateral stability to the tonearm and to eliminate the problems faced by the device described in U.S. Pat. No. 4,113,265. The center of gravity of the pair of balance weights is located below the l-vertical direction relative to the tone arm's bi+1r cloud point.
I found out what I should do. Furthermore, in order to prevent the tone arm from swinging 1#' when tracking a distorted record, K is set so that the axis KM connecting the path to the tone arm extends perpendicularly to the cantilever of the needle. I know what I should do.・Is the center of gravity of the Grank weight Bi? Since it is located slightly below the hit point, the restoring force that occurs during the vertical movement of the L-arm is significantly smaller. For example, in the - embodiment, the restoring force generated for every Ifl+ <2 when the tonearm is approximately 6.35 mm (.1/4 inch) downward is 1.
It was between 5 mm and 11 grams (m2). This restoring force is the same as the conventional measurement of tracking force (in Durham units).
It can be considered as negligible compared to 9. In fact, the lateral balance weights specifically constructed by the inventors provide the tonearm with stability in the tilj direction that minimizes the increase in inertia.
The LJ, I- point is substantially coincident with the center of gravity and is similar to conventional 1-points of the type disclosed in the Stanton patent.
- The vertical culm force, which was a drawback of the arm structure, can be effectively removed.

(29) As will become clear from the following description of this specification, the one-arm structure of the present invention further includes another structural feature that further reduces distortion scenery during sound reproduction processing. . For example, the tone arm itself is formed from a pair of tubular members extending from one center to the other, and a plurality of sound attenuating bands are spaced apart from each other in the tubular portion. This reduces the transmission of resonance.

It is an object of the present invention to provide a unique uni-pivot bearing assembly that pivotally supports a tonearm subassembly, the bearing assembly intersecting the center of gravity of the tonearm subassembly and perpendicular to the longitudinal axis of the subassembly. 4) A tone arm mounting structure having a pivot point and a point T positioned on a horizontal line extending from 4) to ! It is about providing.

Another object of the present invention is to provide a pair of side notches extending from opposite sides of the two-weight balance weights of the uni-pivot bearing assembly.
An object of the present invention is to provide a tone-arm (:10)-me structure having a 1F center aligned vertically downward with respect to the 3p point.

Another object of the present invention is to provide a tone arm structure comprising a pair of side balance weights positioned in a vertical plane substantially parallel to the main axis of the tone arm needle and extending substantially perpendicular to the cantilever of the needle. It's all about providing.

Another object of the invention is that the tone arm itself includes a pair of concentrically arranged tubular shaft members, and a plurality of acoustic damping bands between the tubular shaft members to damp resonances within the tone arm. An object of the present invention is to provide a tone arm structure arranged at regular intervals.

Another object of the present invention is to arrange the front part of the tone arm in a row. Quiet 1 attached near the cut silk solid body. Ri/Release joint (
is removably attached to the central housing introductory body via a quick-release coupling to prevent excess weight of the connector from adding significant weight to the arm even when the connector is attached to the front end of the arm. At the same time, it has been made easy to disassemble the tone arm structure during transportation and replace the pickup cartridge, which has already been added to the 2-door assembly, to the front.・To provide four arm structures.

Another object of the present invention is to provide a tone arm supplementary solid body that can be easily adjusted both vertically and horizontally with respect to the frame portion of the chord reproducing device.

Another object of the present invention is to place a first relatively thick signal line at the front of the tone arm to facilitate handling by the user, while also providing a relatively thin signal line.

A tone arm structure in which the Litz-type signal line is arranged in the remaining part of the tone arm and the tone arm mounting assembly to reduce the resistance of the signal line against the tone arm's pivotal movement. It is about providing.

Yet another object of the present invention is that by employing a rack and pinion drive mechanism, the position of the balance weight relative to the needle can be adjusted without rotating the rear balance weight. An object of the present invention is to provide a rear balance weight assembly.

Yet another object of the invention is to support the entire rear balance weight added to the tone arm on a resilient material disposed between the balance weight and a support collar extending through the balance weight. Accordingly, it is an object of the present invention to provide a tone arm structure which can be effectively removed from a rear balance weighted tone arm.

The foregoing objects of the present invention are directed to a preferred embodiment of the tone arm structure of the present invention comprising a tone arm subassembly, the subassembly having one pivot pin extending therefrom. achieved. The pizzet pin pivotally engages a cup-shaped recess formed in the support member, and the hisp point extends across the center of gravity of the tonearm subassembly and extends through the subassembly to one end. It lies in a horizontal plane perpendicular to an axis extending from the disposed pickup cartridge to the rear balance weight disposed at the other end. The tone arm structure further includes a 1-arm subassembly (33
) The center of gravity of the front balance weight is in the vertical direction of the pitch point of the tone arm subassembly. The front balance weight is positioned 7 downwardly such that the vertical plane intersecting the balance weight extends approximately parallel to the longitudinal axis of the needle, i.e., principal tlIIl+i, and perpendicular to the cantilever of the needle. Preferably, the tonearm subassembly further includes a tonearm comprising a pair of concentrically disposed tubular members, with a plurality of acoustic damping members spaced apart from each other between the tubular members. The acoustic damping members are preferably spaced apart from each other to absorb vibrations over a wide range of frequencies.A silicone fluid is placed between adjacent damping members. Resonances appearing within the tonearm can be further reduced.The uni-pivot bearing structure allows the tonearm structure to be biased relative to the support member.
Immersion in a container of fluid, such as 1f (34) silicone, lubricates the contact surfaces of the bits to reduce the force required to support the bits, as well as permanently dampen any residual resonances that may be present. be done.

That is, such an Mf body improves the effective quality of the tone arm and the compliance of the needle assembly.
As a result of the interaction of I'LI'l, it has the effect of attenuating low frequency resonance called CM (Compliance x Mass) resonance that exists throughout the tone arm. Such a fluid can control the rapid vertical movement of the tone arm caused by the warping of the record surface by increasing resistance to the rapid vertical movement of the tone arm.
This works to improve the tracking of the arm. As a result, the pitch of the tone arm that has not been subjected to attenuation processing can be reduced. This is caused by the phenomenon that occurs when the needle sticks into the troughs of the warp on the record surface, or comes off the crests of the warp on the record surface, as occurs when using a record cutter. When the arm is moving normally, this damping resistance is substantially absent and does not interfere with the movement of the arm.

The present invention provides a unique rear balance weight assembly that is adapted to be removably attached to a tone arm housing assembly. Round-shaped balance sea urchin "Ito" is "Sorgokun J ("5
The band is supported by a band or ring made of a damping material such as the material sold under the trade name J17. It is convenient to use a rack and pinion drive assembly to determine the distance between the rear balance weight and the needle.The balance weight assembly is mounted on a tone arm assembly. Because it can be easily removed from the

Benefit from the weight of the backup cartridge! Balance weights of different weights can be used.

Another embodiment of the invention, in an eleventh embodiment, is a uniquely constructed balance having a relatively thin ring of elastically deformable material disposed within a vortex formed in a through hole in the center of the balance weight. A weight support string solid body is used with the tone arm Sugi and Shintai. The deformable ring engages a support collar passing through the balance weight to support the entire balance weight. As a result, the balance weight resonates at approximately the same frequency as the CM resonance of the pickup cartridge mentioned above.

In addition, the tracking behavior of the Tonearm+ has been significantly improved, and the occurrence of low frequency overloads has been reduced.
Moreover, the tone arm's low frequency reproduction is improved overall. In yet another embodiment of the invention, b) instead of a single ring of elastically deformable material, the ring is fixed to the support collar and inserted into a radially extending hole formed in one of the balance weights. Multiple deformable plugs are used. By adjusting the degree of compression of the deforming plug, the resonance of the French weight can be adjusted to compensate for the different resonant frequencies produced by various pick and tube cartridges. As the amount of compression of the deforming plug in one direction increases, the resonant frequency of the balance weight becomes more active. As the plug extends radially outward from the balance weight, the resonant frequency of the balance weight decreases.

The present invention further provides a method and apparatus for correctly positioning the tone arm structure relative to the turntable and for accurately attaching the needle to the tone arm (37). A substrate assembly supporting the body is solidly attached to the turntable. By selectively rotating the leadscrew extending from the board assembly, the opening of the empty shell or the spindle of the turntable can be rotated vertically with the additional fasteners at will. The tone arm structure can be repositioned until alignment is achieved. Once the tonearm structure is properly aligned and the tonearm is lowered, a portion of the mounting fasteners enters the opening formed in the headshell.

After the tonearm structure is properly positioned relative to the turntable, the tonearm is released and the pickup cartridge can be attached to the headshell. 1. Attach the alignment fasteners. 5 mF until the tip of the needle aligns with the predetermined mark on the fastener. By adjusting the position of the cartridge, the cantilever of the needle can be aligned with predetermined marks on the alignment fastener. Once the pickup cartridge is properly aligned (38), it is M5i mounted in the head shell by tightening conventional fastening screws or the like.

Hereinafter, the main body will be explained in detail based on drawing 771J, and similar members are indicated by similar reference numerals in the page I:'/1.

Referring first to FIG. 1 of the drawings, a tone arm structure according to the invention is designated generally by the reference numeral 10. Tone arm structure 10 includes a housing assembly 12 and a pitching assembly 12 has an arm 14 extending generally straight therefrom. Housing assembly 1
2 is adjustable and supported above the frame portion 16 of the record playback device V or the like in a manner described in detail below.

The arm 14 is attached to the outer tubular member 1 as shown in No. 4I.
8 and the tubular member 8. The tubular member 8 has an inner tubular member 20 extending concentrically within the tubular member 8. The tubular member 20 has an outer diameter equal to that of the tubular member 1.
A plurality of band-shaped acoustic damping members 22 can be arranged between the inner tubular member 20 and the outer tubular member 8, respectively. It looks like this. 'I end part H, i.e. band 22 (dimension,
It serves to hold the former parts 18 and 20 aligned with iF and W7p so as to be out of concentricity, and to prevent resonance from being transmitted through the arm 14. In a preferred embodiment, the band 22 may be formed from an energy absorbing material, such as the material sold under the designation "5orbothane". . Alternatively, each band could be formed from 11 pieces of conventional rubber-like material and placed between the tubular members 18 and 20 i''!+'.

Further, at least some of the bands are about 2.54 to 4
．． N1.08 cm (1 to 2 inches) apart from each other at irregular intervals. If'+' is preferably dried to suppress the formation of resonant nodes.A layer of rubber material such as silicone is injected into the gap between adjacent pans I-'''22. As a result, resonance can be further suppressed and the Japanese pattern of the arm 14 can be made easier.

As shown in FIGS. 1 and 2, the end of pickup arm 14 is firmly engaged with a cartridge support member or head shell 24. As shown in FIGS. Naturally, the head shell 24 must be strong and lightweight. Is the head shell 24 that meets these conditions made of machined aluminum or Du? Du
Pont)'s "Rynite J"
It can be made from materials such as molded resin formulations such as. Head shell 24 kebi 1. Cup arm 14
It has a sleeve-shaped end 26 surrounding a portion of the arm and engaging the arm. A gusset 28 in the shape of at least one web is attached to the first leg 30A.
and the leg portion 30B of the chiku 2 attached to the leg portion. The leg portion 30A is connected to the end portion 26 and extends in two directions perpendicular to the pickup arm 14, and the leg portion 30B extends substantially parallel to the arm 14. As clearly shown in FIG.
It includes a portion 32 of the brush 1 connected to A, and a second portion 34 forming an oblique angle with the first portion 32. Further, the head shell 24 is integrally attached to the second portion 34 (
41) The rising end 36 having a curved lower surface is fixed so that the operator can easily lift the arm 14 by grasping the end 36 and exerting an excessive force on the record surface as shown in the figure. This is so that it can be done. In order to reduce the weight of the entire head shell 24, the legs 30BK of the head shell 24 are provided with a plurality of hook holes 38. The head shell 24 is
No that will be mentioned later! Pick up from 1” Yu’ζ -) -
) Adjust the width L so that the height of the ridge is aligned with the center of the ring 1'' of the arm 14 and balance weight 136 in the horizontal direction.
It is shaped like a letter.

The procedure for aligning the tips of the needles in installing the cartridge will be described in detail later.

Here, 3rd A is a cross-sectional view of the Unong silk solid body 12.
Ri1' will be explained based on the figure. While the arm 14 is making a tracking movement on the uneven record surface, the tone arm structure 10 generates a force in the vertical direction. You may do 7-point exercise, but how many steps does it take? 1. Univipa that can support the entire tone arm structure during exercise? The solid bearing silk solid body is surrounded and supported by the solid body 12 (42). νIJchi,)1
The housing assembly 12 includes a generally cup-shaped lid member 40 and a separate sleeve-shaped body or support member 42 disposed in contact with the lid member. Members 40 and 42 have a plurality of corresponding threads 44 cut along their opposing ends to threadably attach the members together. The interior walls of members 40 and 42 define a hollow chamber 46 that extends longitudinally through most of the housing body 12. The lid member 40 also has a threaded hole 48 therethrough aligned with a longitudinal axis extending through the center of the lid member 40 . Additionally, there is a bin member 50 having a threaded portion extending within the bore 48 and a conical hollow portion 52 extending through a portion of the chamber 46.

The support shaft 54 is the frame part 1 of the record playback device.
6, the shaft 54 has an elongated cup-shaped portion 56 disposed within the chamber 46 so as to surround the hollow portion 52 of the bottle member 50.

Cup-shaped] The cutout 56 has a cup-shaped depression 62 half (-Y
It has a conical end portion 58 formed in the center of the direction. Furthermore, there is a pivot pin member 60, the pin tree round material 60d: 1T1 in the hollow part 52 of the pin member 50.
3A, and has an end with a tee i9 for pivoting engagement with the recess 62, as clearly shown in FIG. 3A. In a preferred embodiment of the present invention, the pivot introducer body is polished smooth to a degree comparable to sapphire and the pin and I bit assembly has a large load and impact capacity. Both member 60 and conical end portion 58 are formed from an extremely hard material, such as carbide tungsten.

Heavy-weight 5ili
cone) type fluid into the cup-shaped portion 56 to a level sufficient to submerge the chimney end of the pivot bin member 60. The silicone fluid acts to reduce friction between the engaging surfaces of the vial member 60 and the indentation 62 by forming a film of lubricant between the vial member 60 and the indentation 62.

More importantly, the fluid also has Biy+? The purpose of the present invention is to attenuate resonances that enter the record assembly, thereby improving the tracking of distorted records as described above.

The support shaft 54 also has a slot or aperture 64 perpendicular to its longitudinal direction in the portion that contacts the cup-shaped portion 56 . The shaft 54 also has a cup-shaped portion 5.
Portion 68 opposite 6 is threaded and a hollow passageway 70 extends through portion 68 the length of slot 64 . Portion 68 of shaft 54 extends through a through hole 72 formed in frame portion 16 of the record player. To support support shaft 54 in the proper position relative to frame 16, a substrate assembly surrounds shaft 54 and is secured to frame 16 in the manner described below. The board assembly includes a generally rectangular board member 74 having an elongated slot 76 extending through the center thereof.
is formed. Substrate 74 is secured to frame portion 16 by a plurality of conventional connecting fasteners 78. The base assembly (45) body further includes a pusher member 80 having a hollow sleeve portion 82 of sufficient inner diameter for the support shaft 54 to pass therethrough. The bushing member 80 includes a flange-shaped end 8 integrally attached to and extending radially outwardly from the sleeve portion 82.
There are 4. The substrate assembly further includes a slide member 86;
The slide member 86 is formed with a hole having a diameter sufficient for the member to surround the sleeve portion 82 of the pusher portion 80. Bushing member 80 also includes a rib-shaped portion 81 extending radially inwardly within a slot-shaped opening 83 formed in the outer surface of portion 68, as best seen in FIG. The rib-shaped portion 81 serves to prevent the shaft 54 from rotating when the shaft 54 undergoes vertical and horizontal position adjustment.

Reference numeral 88 designates the vertical position adjustment member, which comprises a thumbscrew with a central opening that is threaded for encircling engagement with the threaded portion 68 of the support shaft 54. By turning screw 88 either clockwise (46) or counterclockwise, shaft 54 is moved longitudinally. This causes housing assembly 12 to be raised or lowered relative to frame portion 16.

In another embodiment shown in FIG. 3B, the bushing member 8
A locking mechanism is provided to prevent accidental movement of the shaft 54 relative to the 0. That is, a threaded hole 85 extends generally radially through the end 84 of the bushing member 80. A plug 87 made of a ceramic material such as nylon can now be placed in the hole 85 and the section 68 of the shaft 54 can be inserted into the hole 85 by introducing a set screw 89 into the hole 85. be pressed against. Plug 87 is pressed against portion 68 with sufficient force to prevent inadvertent movement of the shaft;
Thread the set screw 89 into the hole 85. In the embodiment of FIG. 3B, rib portion 81 and slot 83 are not provided, and set screw 89 and plug 87 prevent misalignment of the tonearm structure.

Referring again to the embodiment shown in FIGS. 3A, 5A and 5B, the slide member 86 and bushing member 80
The flange end 84 overlaps the slot 76 on both sides, and a pair of connecting pins 94 extend between the slide member 86 and the flange end 84 to engage the slide member 86 and the flange end 84 with each other. There is. That is, the slide member 8
6 has a pair of lower lips 90A and 90B that engage knurled walls 92A and 92B formed on the underside of base member 74 on opposite sides of slot 76, while flange end 84 A pair of overlapping or pad portions 93A and 9 engage the underside of base member 74 on opposite sides of slot 76.
It has 3B. Flange end 84 and slide member 8
This unique overlapping structure with 6 prevents the slide member 86 from vertically separating from the base member 74 while simultaneously allowing the slide member 86 and flange end 84 to move laterally along the slot 76. I have to. A first support sleeve assembly 100 is fixedly mounted to the base member 74 and a second threaded sleeve assembly 102 is fixedly mounted to the slide member 86. The first sleeve assembly 100 has a connecting pin 104 and the pin 104 has an unthreaded portion extending through the sleeve assembly 100 to receive the end of a key member extending from the sleeve assembly. A circumferentially extending groove is formed in the bottle 104. The bin member 104 further has a threaded end that extends through the threaded support sleeve assembly 102.

To adjust the horizontal position of the support shaft 54 relative to the base member 74, simply rotate the bin 104 either clockwise or counterclockwise. As the key member extending from the sleeve assembly 100 engages the groove formed in the bottle 104, the bottle 104 rotates relative to the sleeve assembly 100, but the sleeve assembly 100
longitudinal movement is restricted. In fact, the engagement of the key member and the groove fixes the position of the shear bin 104 relative to the base member 74. However, because the second sleeve assembly 102 and the bin 104 are threaded together (49), rotation of the bin 104 causes horizontal movement of the sleeve assembly 102 and the slide member 86 to which the assembly 102 is attached. This movement of the slide member 86 causes a similar movement of the υ push member 80 and the shaft member 54 passing therethrough.

In another preferred embodiment of the present invention, the bushing member 80 and the takeoff screw 88 are mounted in an alignment assembly generally designated 69' in FIG. ing. The alignment assembly includes substrate member 74 of FIG. 3A.
It is provided with a substantially rectangular mounting block 70' slidably mounted on the mounting block 70'. The mounting block 70' has a pair of shoulder
bolt (shoulderbolt) extra edition block 7
0' and has a pair of open lowers 1' and 72' large enough to enter a slide member, such as slide member 86, located on the opposite side of the base member.

With such a configuration, the supplement blocks 70' can be located in both directions coincident with the longitudinal axis Q--Q extending through the blocks. To initiate the movement of the mounting block 70', a threaded adjustment pin (not shown) is inserted through the mounting block into a screw extending in a direction parallel to the longitudinal axis i1Q-Q. Insert it into the hole 75' which is the cut.

Selective rotation of such threaded pins may change the position of the mounting block 70' relative to the fixedly disposed base member.

Mounting block 70' serves to support the tonearm support shaft in a manner described below. That is,
The mounting block 70' has a cavity 80' whose plane is approximately rectangular.
have. Cavity 80' longitudinal axis Q-
It has an end surface 81' that is parallel to Q and is provided along a plane that approximately divides the extending mounting block into two equal parts. End face 81'
is a semicircle extending outward from the cavity 80' and a back surface part 8.
2', which portion has a radius of curvature approximately equal to the radius of curvature of the tone arm support shaft (not shown). Within the cavity 80' is a clamping block 83 having a semicircular radial portion 84' aligned with and extending away from the radial portion 82' of the cavity 80'.
' is arranged so as to be slidable. When the opposing circular and circular face portions 82' and 84' are aligned to form a round/cone shaped opening, the tone arm support shaft is attached to the mounting block 7.
0' allows complete insertion.

Tightening block 83' is tightened by rotating a set screw that extends through block 70' into contact with tightening block 83' in some cases, so that it is in frictional engagement with the tone arm support shaft. Let's go.

If you wish to change the vertical position of the one-arm support shaft held within the mounting block 70', turn the setscrew 85' to release the pair of bias springs 86' and 8.
It is only necessary to push the clamping block 83' away from the end face 81' of the cavity 80'. Each biasing spring extends between a hole formed in clamping block 83' and a portion of end face 81'. However, it will be appreciated that the holes could also be formed in the end face 81' rather than in the clamping block 83'.

Preferably, the clamping block 83' is formed from a material such as nylon that will not scratch or damage the tonearm support shaft.

As shown in FIG. 3A, a hollow mounting assembly 110 is connected to the side of the body or support member 42 of the housing assembly by a plurality of connecting members 112, such as bolts. A mounting assembly 110 extends directly outward from the housing assembly 12 and has a screw 1 on the outer surface as shown in FIG.
16 is provided with a hollow)-shaped member 114 having a cutout.

The pickup arm 14 has an end member 1 consisting of a conical portion having an outer diameter slightly smaller than the outer diameter of the knob-shaped member 114 and a truncated conical portion extending from the conical portion.
It has 18. A radially extending flange 120 is formed on the end surface of the rounded portion of the end member 118, and a rotatable clamping ring 122 surrounds the end member 118.

The inner surface of the clamping ring 122 is threaded to correspond to the threads 116 formed in the hub-shaped member 114. Furthermore, the end member 118 of the pickup arm 14 supports a plurality of female electrical connectors having a shape corresponding to the number of female electrical connectors provided on the hub-shaped portion 114.

(53) The pickup arm 14 is connected to the housing assembly 12 as follows. First, the end phase 11 is engaged by engaging the L-shaped connector 124 with the corresponding template connector.
8 is brought into contact with the hub shape control 4. Next, the threads on the inner surface of the tightening ring 112 are engaged with the threads formed on the hub-shaped member [14]. Then, the inward flange formed on the outer end of the clamping ring 122 abuts against the stop flange 120 formed on the end member 118, and the clamping ring 122 is prevented from moving any further. Turn.

Returning to FIG. 3A, a balance arm 130 extends across the page from the body or support side 42 and is disposed 180° opposite the mounting assembly 110. . A support collar 132 surrounds a portion of the arm 130 and includes a hub feature and a sleeve feature integral with the hub feature.

A set screw 134 is inserted into a radially extending hole formed in the hub-shaped portion of the collar 132 .
4 (54) is screwed to the extent that it contacts the arm 130, and the collar 132
is fixed to the arm 130. A balance weight 136 is attached to the arm, but the balance weight 136
has a through hole extending in the direction of the shaft opening, and the negative through hole has a diameter larger than the outer diameter of the sleeve-shaped portion of the collar 132.

The groove 137A is located in the through hole 11 of the balance weight 136.
．． 3, or in a preferred embodiment of the invention, groove 137A has a depth of approximately 1/16 inch and a width of approximately 1/8 inch. . A ring 138 made of an elastically deformable phase material forms the groove 1.
37A, and the ring 138 is connected to the collar 132.
3-shaped groove 1 formed in the sleeve-shaped part of
37B has an inner diameter that can be engaged with the groove.

The ring 138 is the only support for the balance weight 136, and the vibrations between the balance weight 136 and the arm 1
30 can be suppressed. In embodiments of the present invention, arm 1
The longitudinal axis of arm 4 is coincident with the longitudinal axis of arm 130. Furthermore, arms 14 and 130 and housing assembly 12 form a tonearm subassembly having a 7H center that lies in a horizontal plane passing through the centers of gravity of tonearm 14 and arm 130.

By adjusting the positions of the pin member 50 and the cup-shaped portion 56, the uni-pi pair? 7.Put the pit point of the three-dimensional bearing,
It may be aligned with a horizontal plane that intersects the center of gravity of the tonearm subassembly and extends orthogonally to the longitudinal axis of the tonearm subassembly. When these conditions are met, the tone arm/sub assembly
The tonearm subassembly can be pivoted vertically without affecting the position of the assembly, resulting in a balanced position. Even if the run weight 136 could be moved to apply a tracking force to the pickup cartridge attached to the pickup arm 14, it would not create a tracking force or restoring force as described above. In other words, the restoring force acts in the opposite direction to the direction in which the big assozo arm 14 performs the pivot movement.
This is because the tracking force is always directed toward the record surface.

Another embodiment of the invention is shown in FIG. 9, in which the pickup arm 14' is permanently engaged with the mounting assembly 110'; Fasteners 112 are attached to the housing assembly 12. In the embodiment of Figure 9, the balance weight 136 and resilient ring are similar to those of the embodiment of Figure 3A. A thread is formed on the inner surface of the collar 132' that corresponds to a thread formed on the outer surface of the balance arm 130'. When rotated, collar 132' and balance weight 136 move longitudinally relative to arm 130'.

In yet another embodiment, shown in FIGS. 11A and 118, grooves 137A and 137B and an elastically deformable ring 138
is not provided. In its place, a plurality of suitably sized four conical deformable plugs 139A to 139D are connected to the collar 132, respectively.
It is fixed to the sleeve-shaped part of. Plugs 139A-139D may be spaced ~1'f apart with approximately 90° spacing to the mating plugs 113FD around collar 132, with each plug having a separate radially extending hole 141A formed in balance weight 136. noff114
It has grown to 1D. Further, a plurality of rounded nylon plugs 143A to 143D are inserted into the radial outer ends of the holes 141A to 141D, respectively. Furthermore,
A plurality of setscrew fastening bodies 145A to 145D are introduced into the holes 141A to 141D, respectively.

When the setscrews 145A to 145D are rotated clockwise, the setscrews will advance and the ends or nylon plugs 143
Contact A to 143DK. Set screws 145A to 14
When 5D is further rotated clockwise, plug 143A
The plugs 143A to 143D abut and compress the deformable plugs 139A to 139D, respectively, by pressing the plugs 143A to 143D. Varying the size (58) of each plug 139A-139D also changes the vibration damping characteristics of the plug, which allows Schizorag to vary or adjust the resonant frequency of the balance weights used in various tonearm structures. Can be matched with pickup cartridges. In particular, since the initial size of the plugs 139A-139D is compressed and reduced, a higher resonant frequency can be obtained for the balance weight. Similarly, when set screws 145A to 145D are pulled back, plugs 139A to 139D
can return to its original shape, obtain the lowest frequency, and the upper one.

In the balance weight assembly described in connection with FIG. 3A, the center of gravity of the balance weight 136 is
It can only operate properly if it coincides with the zero longitudinal axis. Balance weight 136 or ring 1
38 is not properly adjusted, rotating the balance weight 136 will cause the balance weight 13
This results in displacing 7Lu of 6 from its proper position. .

To eliminate such problems, the preferred balance weight assembly 200' shown in FIGS. 12-16 is constructed such that the balance weight does not rotate. 1st
As shown in FIG. 5, the balance arm 202' is attached to a mounting shoe 204', which is attached to the sleeve-shaped body side 42. A substantially T-shaped retaining notch (206') extending vertically is formed in the shutter part. The holding pocket 206' extends from the top i'i71 of the shoe part side 204' to the bottom surface of the shoe part 204'.
It is provided in a direction perpendicular to the longitudinal axis of the. During assembly, insert the normal tightening screw 210' into the opening 208'.
The shoe member 204' can be secured to the member 42 by insertion through a hole formed in the member 42 that aligns with the opening 208'.

The balance arm 202/ is formed in a substantially rectangular cross-sectional shape, and has a T-shaped pocket formed on one side 204' of the mounting shoe.
T-shaped end 212' matching the size and shape of 206'
It is preferable to have However, making the cross-sectional shape of the balance arm 202' the same as the conventional one
This is outside the scope of the present invention. The pocket 2 has a shape that can accommodate an end portion 212' of another shape.
06', the end 212' can be formed into a conventional shape.

Indicating cursor (jndexing cursor) 2
14' is slidably attached to a portion of the lance arm 202' remote from the end 212'. cursor 2
14' includes a hollow body portion 216' surrounding a portion of balance arm 202' and an elongated rod portion 218' extending parallel to balance arm 202'. Guidelines 220
Although a pointer 220' is provided at the end of the rod portion 218', the pointer 220' is preferably aligned with a scale 222' provided on the surface of the balance arm 202'. Additionally, an adjustment screw 224' extends through the body portion 216' in frictional engagement with the balance arm 202' to adjustably position the cursor 214' relative to the scale 222' in a manner described below.

(61) Reference numeral 230' indicates a carrier assembly, and the assembly includes a substantially U-shaped slot IJ-7' as shown in FIG.
23i', and surrounds a part of the balance arm 2o2'. The sleeve 231' has legs 232A' and 232B' extending into a pair of flat legs and a middle section 232C' connecting the legs 141 to each other. The legs and intermediate portions 232A' through 232C' are sized for dynamic engagement with opposing surfaces of the balance arm 202' when the balance arm 202' is fully inserted into the gear rear assembly. The binion gear 234' is connected to the leg 2.
A drive shaft 236 extending between 32 A' and 232 B'
’ is mounted so that it rotates with the Drive shaft 23
61 engages an adjustment handle 238', partially shown in FIG. 16 and clearly shown in FIG. Turning the handle 238' clockwise or counterclockwise will rotate the binion gear 234' in the corresponding direction. Wave spring washer (wave-spr
ing washer) 239' is inserted between the vtutAi handle 238' and the leg 232A',
Preventing undesired rotation of the pinion gear 234' (
62) Provides clamping friction. Washer 239' can be made from metal, Teflon or other conventional materials. Furthermore, if the washer 2391 contacts a relatively fixed surface to provide a frictional braking force, the washer can be placed on any portion of the drive shaft 2361.

A hollow, round-shaped balance weight 2401 surrounds the end of the carrier assembly opposite the mounting shell '240'. The balance weight 240' can be formed as a single piece or, as shown in FIG. 15, from a pair of laterally disposed ring-shaped pieces. When forming from a pair of parts, it is preferable to insert the delivery ring 245' into a face provided on the periphery of each part. balance way) 240' to 1
The entire gun run weight, whether formed from one, two, or multiple pieces, is assembled into the carrier assembly 230.
The ring 24 '6' is preferably formed from an energy absorbing material of the type sold under the trade name ``Tsurugatan'', but any conventional energy absorbing material may be used. This is also included within the scope of the present invention.

・In order to change the position of the balance weight 2401, a binion gear 2 is installed on the underside of the balance arm 202'.
A rack gear 248' is provided which meshes with 34'. Appropriate rotation of handle 23B', drive shaft 236' and pinion gear 234' relative to rack gear 248' causes the carrier assembly and balance weight mounted along relatively fixed balance arm 202' to The position of can be nH+.

To properly adjust the balance weight assembly 200', the tone arm must be at the zero balance position.
Adjust the position of the balance weight 240'. Such zero balance is achieved by holding the tone arm at its own stop position. Once the zero balance position is determined, the pointing cursor 214' is slid along the balance arm 202' until the pointer 220' is at the zero position on the scale 222'. To apply a positive tracking force to the tonearm needle, handle 238' is rotated to position carrier assembly 230/and balance weight 240' toward body member 42 and away from pointing cursor 214'. It is only a matter of adjusting the balance arm 202' along the balance arm 202'. When carrier assembly 230' is moved a predetermined distance, the pointer changes to the number on scale 2221, often between 1 and 3.
refers to This position may also conveniently correspond to the desired tracking force in grams, depending on the scale used.

One of the significant advantages of the balance weight assembly 200' is that the balance weight being used can be quickly changed, should such change be required due to the weight of the pickup cartridge being used. There is.

Depending on the weight of the pickup cartridge (often 25 to 20 grams), it is possible to remove some of the balance weights by removing the second balance weight assembly and replacing it with a completely separate second balance weight assembly. You can use one of the following. In prior assemblies using a single balance weight, the balance weight must be located a certain distance from the pivot point to properly balance the cartridge. Such a configuration significantly increases the overall inertia of the tone arm structure. On the other hand, if the balance weight can be changed as in the present invention, a correctly selected balance weight can be placed significantly closer to the pivot point, thereby minimizing the inertia of the tone arm structure. Can be made smaller.

In order to provide lateral stability to the tone arm structure shown in Figures 1.2 and 6, a pair of lateral balance weights 1 are provided.
a pair of shafts 148 with threads 44 and 146;
and 150, respectively, and the shaft 148
and 150 extend in a direction 180 degrees away from both sides of body member 42.

Immediately, shafts 148 and 150 are big up a (66
) extends in a plane bisected by a longitudinal axis extending between the arm 14 and the lance arm 130;

Further, the shafts 148 and 150 are aligned with each other and the centers of gravity of the balance weights 144 and 146 are located on a line extending vertically downward relative to the pivot point formed by the pivot bin member 60 and the wedge 62. It is attached to a part of the main body member, ie, the support member 42, so that As a result, a beam-balanced mounting system is created for lateral bipitting movement of the housing assembly 12 and pickup arm 14. This is because the lateral bi+1 pot movement of the pick-up arm 14 toward either the no-pull run weight 144 or 146 causes a yaw motion that attempts to return the pi-dot bin 60 to its initial vertical position. It means that. However, the backlash created by balance weights 144 and 146 has a significant effect on the vertical pivoting of the tonearm subassembly, such as occurs when tracking vertically over a record surface. When I give it, I don't have it. In an advantageous embodiment of the invention, the weights of balance weights 144 and 146 are mounted 1.50K concentrically with their respective shafts 148. However, it seems that the center of gravity of the balance way l-assembly is Unipia+? U1゛, balance weight]
It is also within the scope of the present invention to mount 44 and 146 eccentrically.

The preferred embodiment of the tonearm subassembly shown in FIG. 12 has a -21 balance weight 144.
' and 146' are tone arm subassembly 310'
The axis R-R intersects a line extending vertically downward from the center of gravity of
is located along. In order to prevent the stylus (not shown) from swaying when vertically tracking a distorted record surface, the axis R-R can be displaced by an angle α from the horizontal axis T-T. I feel safe. The angle α corresponds to the offset angle α of the needle cantilever, which is aligned with the axis S-S of FIG. It is displaced by α. Actually, the side balance weights 146' and 144Tj: Lateral! H'il T-
It is displaced by an angle α in the clockwise direction from T. The angle α is inversely proportional to the actual measured distance between a vertical plane extending through the tip of the needle and another vertical plane extending through the pivot assembly at the center of the housing assembly. For example, if the actual distance is 240 degrees, the angle α is 229 degrees.

1. If the distance is 235111111, then the angle α is 234°. The angle α is therefore determined by the position of the needle tip relative to the pivot point. and the axis R-R
are positioned so as to be perpendicular to the axis 5-SK plane defined by the angle α. Balance weights 144' and 14
6' is supported by the bit at an angle α as shown in FIG. Extends parallel to the main axis. This (69) ensures that the stylus is always kept in an accurate upright position even when vertically tracking on a distorted record surface. In contrast, if you mount the side balance weights so that they extend across the longitudinal axis of the tonearm subassembly, the tonearm will move laterally as the stylus moves vertically along the skewed record surface. Unable to prevent rolling motion. Thus, by displacing the axis of the lateral balance weights in this manner, a significant advantage is obtained that the needle can be held upright with or without vertical tracking movement. It will be done.

As shown in Figures 1, 2 and 3A, a holder assembly preferably formed from aluminum is provided.
assembly) 160 is fixed to the support shaft 54 at a position adjacent to the XO@4 so as to surround the support shaft 54. The holder assembly 160 has an anti-slip mechanism attached to the assembly.
maehanjsrn), supporting manual arm lift assemblies and arm stationary assemblies. That is, Borda (
70) The assembly 160 has a front portion 161 that extends substantially parallel to and spaced downward from the pickup arm 14 when the arm is at rest. Forward portion 161 has horizontal leg portions 162 that extend at generally right angles, with leg portions 162 and support shunt 148 extending generally parallel to each other when the support shaft is in the rest position. The leg portion 162 has a flange 1 extending vertically at the end thereof.
64 is attached, the flange extending generally parallel to the support shaft 54. As shown in FIG.
4 is a longitudinal axis Z-Z extending through leg portion 162;
The K mark is inclined at a certain angle. 7 lamps 164
It further has a through hole 166 at its upper end, and a screw 168.
is rotatably supported in the hole 166 (FIG. 7). As shown in FIG. 7, a small precision bearing assembly 170 is mounted on screw 168, and a ring-shaped sleeve 172 is rotatably mounted on bearing assembly 170. The washer part side 174 is also a groove, the bearing assembly 170 and the flange 16
4 and is secured to a screw 168. The ring-shaped sleeve 172 has a pair of radially extending holes 176 and 178, and the holes 176 and 178 are spaced 900 degrees apart from each other. 1st
The pin part 180 is inserted into the hole 176, and the second
A bottle member 82 is inserted into the hole 178 with supports 1-6. Both the pin portions 180 and 182 extend substantially toward the cow radial direction side from the ring-shaped sleeve 172. Notsuchi 18
4 is the evening of the bottle part month 180) It is cut in the circumferential direction near the end, it is sweet, the balance weight 186 is the pin part month 182
This is due to several cases. Balance weight 186 is in hole 19
Pin part 182 by set screw 188 inserted into 0
The first end of the thread 192 is secured to the notch 184 of the pin 180 and the balance arm 13.
0 and has a second end secured around the 0.

The operation of the anti-slip mechanism will be described with reference to FIG. 6, which shows three positions of the anti-slip mechanism during operation of the tone arm structure 10. That is, when the pickup arm 14 is in the rest position 1, the pin and balance weight are at the positions indicated by 180'' and 186'', respectively. When the pick-up arm 14 is pivoted to bring the stylus into contact with the beginning of the record surface, the pin and balance weight of the anti-slip mechanism are moved as shown at 180' and 186', respectively, by the thread 192 pulling on the pin 180. Move to position. Furthermore, when the needle approaches the end of the record, the pin and balance weight of the anti-slip mechanism each move to 180 mm.
and comes to the position indicated by 186. Adjusting the position of balance weight 186 relative to pin 182 creates an anti-slip force that holds tone arm structure 10 in the proper lateral position relative to the record surface (not shown). Because the thread 192 exerts a rolling action against the outer surface of the housing assembly 12, no friction occurs between the thread and the housing assembly.

The thread 192 is connected to the uni-pivot bearing assembly when the pin and balance weight of the anti-slip mechanism are in positions 180 and 86, respectively. Extend inside the same horizontal door 1 that includes cut point (73), 1.
Twisting of the body 10 about the shaft 54 should be prevented.

Another preferred embodiment of the anti-slip mechanism used in the present invention is shown in FIGS. 12 and 20.

In the embodiment of FIG. 12, the leg portion 162 and the seven lanterns 1641':J are not provided. Instead, a bias bearing holder
holder) 180' is face-screwed into the holder assembly 160'. As shown in detail #ll+ in FIG. 20, the bearing holder 180' has a threaded end 181.
', and the other end has a cup-shaped portion 182'. A ball bearing assembly 183' is press fit into the cavity 148' defined by the cup-shaped portion 182'. Some examples of screws 184
' extends through a central opening in bearing assembly 183' and is threadedly engaged with bias bearing collar 186';
is aligned with holder 180'. The collar 186' has a conical shape and has a pair of holes 187/ and 188 on its outer surface.
' are provided spaced apart in the circumferential direction. Preferably, the holes 187' and 188' are formed circumferentially at approximately 90° intervals, similar to the holes 176 and 178 formed in the sleeve 172 of the embodiment of FIG. Yes. A first lever 189' extends outwardly from opening 1871 and a second lever 190' extends outwardly from opening 188'. Each lever has a threaded end that engages a thread formed in each 011 port. Furthermore,
Preferably, the aperture 188' is oblique so that an acute angle less than 9o0 is formed between the second lever 190' and the longitudinal axis of the holder 180'. A substantially identical balance way 191' is provided, and the balance way 191' completely inserts the second lever 190' into a passage 192' formed through the balance weight in the axial direction. It is supposed to be done. Spring-loaded ball silanja 193' is balance weight 191
' extends through a radial opening provided in lever 1
90' in thick frictional engagement to prevent undesirable slippage of the balance weight 191'.

A pair of notches or grooves 194A' and 194B' are formed in spaced apart portions of the lever 190' and serve to adjust the end width of the balanceway 1.91'. Balance weight 191' is lever 190'
When the blank is moved along the I
Provides J song resistance. Grooves 194 A' and 194 B/
When the balance weight is aligned, the plunger is spring-fitted into the groove, preventing further movement of the balance weight.

The first lever 189' is formed with a notch or groove 195' at a position spaced from the collar 186'.
' receives a separate thread 196/, such as polyester, extending from mounting shoe member 204' (FIG. 21). The opposite end of thread 196' is held in a jig 197' attached to mounting shoe member 204'. boss 197
' is large enough to pass the thread through, but thread 1
Aluminum crimp (c
rimp) 199' is provided with an opening 198' having an insufficiently sized slot.

Manual arm lift assembly (arm 1 if t
The assembly, generally indicated at 194 in FIGS. 1 and 2, includes an upright lift member 196 and a horizontally extending support member 198 attached to the side of the lift member. ing. control arm 200
is attached to the lift member 196 via conventional cam means, and a predetermined pivoting movement of the control arm 200 moves the lift member 196 and the support phase 198 in a vertical direction.
The pickup arm 14 is lifted up. The abbreviated stationary member 202 is the pickup arm 14
One end of the member 202 is attached to the front portion 161 of the holder assembly 160. The stationary member 202 has a cradle-shaped end to which a flap 204 is hinged. The flap 204 and cradle-shaped end surround a portion of the pickup arm 14, and the flap 204 is pivoted upright to allow the pickup arm 14 to be removed from the stationary member 202.

Returning again to FIG. 3A, a hollow conduit 210 extends through the sleeve-shaped body member 42 and slot (77) 64. Conduit 210 from needle to inner tubular side 18. A portion of a signal line, designated by the reference numeral 212, extends through the example assembly 110 and the conduit 210. From here the signal line reaches a hollow passage 70 provided in the shaft 54. In a preferred embodiment of the invention, strong signal wire, such as 30-wire wire, is used within the tubular phase 18 and the mounting assembly 11 is
0 and conduit 210 are used to significantly reduce the overall resistance of the wire to pivoting movement of pick-up arm 14, such as 44-dirty wire. I can do it. Since 30R-ji and 40R-ji wires are examples of the types of signal wires that can be used, we will use regular R-ji signal wires to carry the signal through the tonearm structure. This is within the scope of the present invention. For example, in place of Litz type wire,
A 44 r-ge wire consisting of five strands can be used.

(78) Support Shirt) 54 i: Yellow F111, while the lid A'40 of the housing assembly 12 is made of plexiglass.
), can be made from aluminum or a plastic-based compound such as that sold under the trade name ``Rinite'', and can be made from aluminum or a resin-based plastic compound, such as the one sold under the trade name ``Linite''.
2 can be formed from aluminum.

However, a variety of other similar materials may be used to construct housing assembly 12 and shaft 54.

The present invention provides an apparatus and method for properly attaching a tonearm structure and pickup cartridge. It is understood that the effective length of the tonearm, ie the distance along an imaginary line drawn between the pot support point, such as horizontally, and the tip of the needle is known.

Additionally, the offset angle, ie, the angle formed by the longitudinal axis of the needle cantilever and an imaginary line defining the effective length of the tonearm, is believed to be known.

One additional overhang, i.e.
The distance that the needle tip extends beyond the rotatable spindle is also considered known. However, even though these geometrical relationships can be readily determined for a particular tonearm structure, traditional tonearm manufacturers may I don't have enough knowledge about how to install it correctly.
)Ta. Accordingly, the present invention provides a quick and highly accurate method for installing tonearms with minimal error.

For purposes of explaining the present invention, it will be assumed that the ten tone arm structures shown in FIGS. 17-19 have an effective length of 235 meters, an offset angle of 23.5 degrees, and an overhang of 17.638 m1+1.

And the goods? For the sake of clarity, let us express the effective length by EL, the eccentric angle by angle α, and the overhang by OR.

The alignment nipple 30' is connected to a turntable (not shown).
It is provided with a body portion 31/ having a conical opening 32' of sufficient size to fit a nipple 30' into a spindle S extending therefrom. Bottle-shaped protrusion 33'
extends from the body member 31/ in a direction coinciding with the longitudinal axis of the spindle S. The protrusion 33' is connected to a hole 34' provided through a portion 30B' of the head shell 24'.
It also has a slightly smaller diameter.

The alignment nipple 30' is removably attached to the spindle S, and the l-arm structure 10, including the head shell 24', is pivoted until the bore 34' is vertically aligned with the bottle-shaped projection 33'. be moved. head shell 24'
is properly positioned on the spindle S, the protrusion 33
' can be inserted into the hole 34'. A template can be used to accurately position the tone arm base relative to the turntable and then align the head shell 24' with the spindle S.

The pickup cartridge can be attached to the head shell 24' by removing the ridge and arm chives that accurately position the tone arm structure relative to the turntable.

Preferably, alignment fixtures 40/ are used to accurately position the pickup cartridge. The alignment fixture 40' has a pair of legs 42' and 4 extending orthogonally to each other.
Preferably, it comprises an L-shaped member formed by 4'. Leg 42' has three outwardly extending seven spaced apart flange portions 45A', 45B' and 45C'.

The flange portions (81) 458' and 45C' are of similar shape and are at a sufficient distance from the 7-run section 45B' so that a tool such as a screwdriver can be inserted between them. There is a separation device at the end. The flange portion 45B' has a substantially rectangular shape, a circle extending parallel to the leg portion 44', and a box-shaped boss 46'. The diameter of the disk 46' is also slightly smaller than the diameter of the common hole 48' of the head shell 24/. The alignment fixture 40' further includes legs 42'.
A generally rectangular transparent plate 50' is pivotally coupled to an end of leg 44' spaced from the leg 44'. Plate 50'id is preferably formed from Plexiglas and is pivotally supported at 810 on one of the legs 44'. Board 50
A cross-shaped mark 54/ having an intersection point 53/ is formed at 17.638 m in front of the spindle S in correspondence with the proper opening of the tip of the needle. ing.

Head shell 24' is inverted so that boss 46' projects through hole 48'. Next, a pickup cartridge (not shown) is placed on the headshell 24' to bring the tip of the needle into contact with the intersection 53'. Next, adjust the pickup cartridge (82) so that the cantilever of the needle is at the cross mark 54'.
The longitudinal axis of the plate 50' represented by . After the pickup cartridge is properly installed on the headshell 24', a suitable tightening tool is inserted between the Franz parts 458' and 45B' and between the 7-runno parts 45B' and 45C' to tighten the pickup.・Tighten the regular tightening screw extending from the cartridge to firmly engage the head shell.

The invention is not limited to the embodiments described above, but only by the claims.

Preferred embodiments of the present invention are listed below.

(1) A record player having a pivotable tone arm O subassembly having a longitudinal axis extending from a pickup cartridge mounted at one end to a balance weight mounted at the other end, supported by the record player. Unibi? 1.
, the Unibi? 4. set bearing means supports said tone arm subassembly to pivot said tone arm subassembly about said bearing means; *, the l l i+ party means is disposed on an imaginary horizontal gauze extending through the center of gravity of the arm-leave assembly and perpendicular to the longitudinal axis of the tone arm subassembly. Uni): ,)
A record reproducing device that is unique in that it has a flat bearing.

(2) The receiving means is attached to the tone arm subassembly and is attached to the pivot bin silk solid body in which the end portion with the tenor 4 is formed, and the record player is attached to the same unit. and a cup-shaped support member whose part is filled with a fluid such as silicone, and the curved end portion of the tenor extends into the fluid and mates with the cup-shaped support member barb toy. 2. The record reproducing device' according to item 1 above.

(3) In a record player 6 equipped with a substantially rigid tonearm-leave assembly to which an IJ is attached, the l-arm-leave assembly is has a first tubular member and a second tubular member surrounding the first tubular member and spaced apart from the first tubular member, both of which are connected to the housing. The tonearm subassembly extends between the pickup cartridge and is further positioned between the first and second tubular portions to prevent resonance from being transmitted through the tonearm subassembly. A record playback device characterized by comprising a plurality of attenuation means.

(4) The plurality of damping means comprises a plurality of separate bands of plastic-like material spaced apart from each other with irregular spacing between the first and second tubular members. The record playback device according to item 3 above.

(5) In a record playback device equipped with a support assembly that pivotally supports a tone arm structure, the one-arm structure passes through a support collar and a balance weight that surrounds the support collar and a portion of the support collar. a pair of radially aligned grooves (85) formed in opposing surfaces of the support collar and balance weight; a pair of radially aligned grooves extending in the radially aligned grooves to support the balance weight and prevent forces and vibrations from being transmitted between the balance weight and the forward thrust lance arm; A record reproducing device characterized in that it has a damping means consisting of a deformable ring.

(6) In a record player including a support assembly that pivotally supports a tone arm structure, the tone arm structure passes through a support collar and a balance weight surrounding the support collar and a portion of the support collar. the tone arm structure further supports the balance weight and has a plurality of radially extending holes circumferentially spaced apart from each other; damping means extending between the balance weight and the support collar to prevent vibrations from being transmitted between the balance weight and the balance arm, the damping means extending through the radially extending hole; Record 1ξP) Raw fitting, characterized in that it consists of a plurality of conical plugs formed from an elastically deformable phase material, each of which is inserted (86) in alignment within the housing.

(7) the damping means further comprises a screw and plug assembly disposed in each of the radially extending holes, the anal plug contacting the firing plug to select the plug relative to the support collar; 7. The record playback device according to item 6, wherein the record playback device performs compression.

(8) A device that balances and supports the tonearm subassembly without generating a restoring force in the opposite direction when the tonearm subassembly tracks a significantly distorted record surface in the vertical direction, which A record playback device having a frame from which the solid body extends, and a support assembly Kl having a longitudinal axis and said supporting assembly Kl.
placed adjacent to each other.・A pick-up car including a housing part and extending outward from the housing part and supporting a ridge and a stylus cut in the cartridge, and the opposite side of the housing part. a tonearm subassembly having a balance support section extending outwardly from the side and supporting a balance weight having a central axis; through the center of gravity of the tonearm subassembly and in the longitudinal direction of the tonearm subassembly so that the tonearm subassembly can pivot in the vertical direction r (r) without creating an opposing restoring force. and uni-pivot bearing means having a pivot point coincident with an imaginary horizontal line extending perpendicular to the axis.

(9) The tone arm portion includes a first tubular member and a second tubular member surrounding the first tubular member and spaced apart from the first tubular member in the radial direction, The tone arm section further includes m between the first and second tubular members.
9. The device according to claim 8, further comprising a plurality of separate damping elements spaced apart from one another.

At 0:00, the damping member is formed from a plurality of sections of the type sold under the tradename Sorbothane so as to surround the first tubular member and contact support the second tubular member. 10. A device according to claim 9, characterized in that it consists of bands spaced apart from each other at irregular intervals.

0]) The first tubular member is disposed concentrically within the second tubular member, and the signal line extends between both ends of the first tubular member. The equipment described in section.

11. The device according to claim 10, wherein a layer of silicone rubber fills a plurality of gaps formed between the adjacent bands.

03. A cartridge support means is engaged with one end of the tone arm part so as to support the cartridge and the needle at a position of the center of gravity of the cartridge that is horizontally aligned with the center of gravity of the tone arm part. 9. The device according to item 8 above.

The cartridge support means has a sleeve-shaped end fixed to the opposite end of the tone arm section (89), and the sleeve-shaped bracket member has a sleeve-shaped end fixed to the opposite end of the tone arm section. a first leg attached to the sleeve feature and extending generally vertically above the tone arm; and a second leg attached to the first leg and extending generally parallel to the tone arm. 14. The device according to claim 13, characterized in that the device has a section.

θ Valley The second leg is the first IJJ41 =1<
and a second portion extending at an oblique angle to the first portion and connecting to the first portion; The above-mentioned first and Q of the legs.
15. The device of claim 14, wherein the device is in constant engagement with the second portion and extends at an angle to a longitudinal axis extending through the tonearm portion.

OQ. The apparatus of claim 8, wherein coupling means are attached to the tonearm subassembly for releasably engaging the tonearm portion with the housing portion.

θno The coupling means is connected to the enlarged end (9) of the tone arm section.
0) a clamping ring rotatably mounted on the section and threaded along the inner surface thereof, and a hollow section fixed to the housing section and threaded on the outer surface of the end opposite the tone arm section; and a retaining member, wherein the tightening ring engages with the threaded portion of the hollow mounting member to engage the tone arm portion with the housing portion. The device described.

0, the enlarged end portion of the tone arm portion has a radially outwardly extending flange, the tightening ring has a radially inwardly extending flange, and the tightening ring has a radially inwardly extending flange; 18. The apparatus of claim 17, wherein the locking ring engages the radially inwardly extending seven runs of the clamping ring to retain the clamping ring on the tonearm portion.

θ The housing portion has a hollow lid-shaped end member and a sleeve-shaped main body member attached to the end portion.
9. The device of claim 8, further comprising a chamber extending longitudinally within the song.

The support assembly has a raised cup-shaped end extending into the chamber formed in the housing portion, and a fluid, such as silicone, fills a portion of the cup-shaped end of the support assembly. 20. The device according to item 19, characterized in that:

(b) said uni-pivot bearing means comprises a vertically extending pivot pin assembly attached to said cap-shaped end member of said housing portion and extending into said cup-shaped end of said support assembly; 21. The device of claim 20, wherein the body has a tapered end that pivots into a notch formed in the end face of the cup-shaped end.

(a) the pivot pin assembly includes a support pin member secured to the fish-shaped end member of the housing portion; a circle extending within the circular end of the support pin member; and a tapered pivot having a conical portion; 22. The device according to item 21, characterized in that it comprises a pin.

21. The apparatus of claim 20, wherein a point of contact between the pivot pin assembly and the corner coincides with the center of gravity of the tonearm/sub assembly.

(c) The housing portion has a conical outer surface, and the tone arm portion and the balance arm portion extend substantially straight from the outer surface of the housing portion and are spaced apart from each other at an interval of 180° on the outer surface. 9. The device according to claim 8, characterized in that:

Q. What is the horizontal direction of the tone arm subassembly? 9. The apparatus of claim 8, wherein lateral balancing means extend outwardly from opposite sides of the tonearm subassembly to provide a restoring force to counteract the tonearm subassembly.

(c) The side balance means is a pair of threaded threads extending from the howe song section to both sides of the longitudinal axis of the tonearm subassembly and supporting balance weights attached to each side. (93) wherein the threaded shaft members each form an angle with the tone arm portion and the balance arm portion; 1.- when the assembly is in the rest position.
26. The apparatus of claim 25, wherein the apparatus is in a horizontal plane that is vertically above a horizontal plane that passes through the longitudinal axis of the arm subassembly.

(b) a first portion having a first cage of signal lines extends from the cartridge through the tone arm portion of the tone arm subassembly; 9. The apparatus of claim 8, wherein a second portion having an opening extends from the tonearm portion through the housing portion and contacts the support assembly.

(c) The first portion of the signal line has a thickness of about 30 9-
and wherein the second portion of the signal line is formed by a Litz-type wire having an r-ge value of about 44. The device described.

(c) Each of the shaft members that are threaded is (
Q4) The device b' according to item 26, characterized in that it forms a substantially right angle with the balance arm portion and the balance arm portion.

(3) Each threaded shaft member and balance weight assembly attached to the shaft member have a center of gravity that varies with an imaginary vertical plane extending through the one-arm subassembly. , wherein the virtual vertical plane extends substantially parallel to the longitudinal axis of the needle and substantially perpendicular to the cantilever of the needle.
Equipment described in Section.

0. Each threaded shaft member and balance weight assembly attached to the shaft member has a center of gravity relative to an imaginary vertical plane extending through the tonearm subassembly, and is offset in a clockwise direction by an angle of about 23 degrees with respect to another imaginary vertical plane extending perpendicular to a longitudinal axis through the tonearm subassembly. equipment.

The support assembly includes a straight support shaft extending vertically downwardly from the housing portion and an elongated slot secured to the record player and large enough to pass the support shaft. 9. The apparatus according to item 8, wherein the substrate on which it is formed costs 11 yen 5.

0→ The trading assembly further includes -( of the substrate surrounding the support shaft and spaced from the housing portion)
1111 and a mounting block assembly slidably attached to the base plate and secured to the slide member, the mounting block assembly and the slide member overlapping on opposite sides of the elongated slot. 33. The device according to claim 32, characterized in that:

041 The mounting block assembly has a cavity in which a tightening block is pulsatably disposed, and the cavity and the tightening block have a sufficient length to insert the support shaft into the mounting block assembly. the mounting block further includes an engagement means for sliding the opposing semicircular chamfers into frictional contact with the support shaft; 34. The device according to item 33, characterized in that:

0→ The engagement means comprises a set screw and extends through a hole in the mounting block assembly such that rotation of the set screw generates a force that presses the tightening block into frictional contact with the support shaft. 35. The device according to claim 34, characterized in that it is in contact with the tightening block.

OQ Apparatus according to paragraph 35, characterized in that the clamping block is formed from a material such as nylon.

071 Item 35, characterized in that a detachment means for pushing the tightening block out of contact with the support shaft when the set screw is pulled is disposed between the side wall of the cavity and the tightening block. The device described in.

(b) The device according to item 37, wherein the detachment means comprises at least one spring compressed between the side wall of the cavity and the clamping block.

(97) 01 A screw is attached to a support flange extending from the base plate so that the claw side block assembly can be selectively rotated to change the position of the mounting block assembly and the slide member relative to the base plate. 34. The device of claim 33, further comprising a threaded aperture of sufficient size to receive a threaded pin member.

(40) A carrier assembly supporting the hollow balance weight assembly in interlocking manner at least partially surrounds the balance arm portion; engaging the balance arm to selectively change the position of the carrier assembly and balance weight assembly without changing the center of gravity of the balance weight assembly relative to a longitudinal axis passing through the arm; 9. The device according to claim 8, characterized in that it has drive means.

0li. The device according to item 40 (98), characterized in that an indicating cursor is slidably attached to a portion of the balance arm portion that is spaced apart from the housing portion.

0→ The 40th aspect, wherein the balance arm portion is removably attached to a shutter member fixed to the housing portion and has a substantially rectangular cross-sectional shape.
Equipment described in Section.

01 The gear rear assembly has a hub portion that completely surrounds a first portion of the balance arm portion and a U-shaped sleeve portion that partially surrounds a second portion of the balance arm portion, the hub portion having a groove of sufficient size to receive a ring of energy absorbing material extending radially outwardly between the hub portion and the balance weight assembly. equipment.

0→ The ring extending in the radial direction is the Sol button (So
43. The device of claim 42, wherein the device is made of a material sold under the trade name RBOTHANE.

The driving means is rotatably supported between both legs of the U-shaped sleeve part and includes a pinion gear and a pinion gear that engage with a relatively fixed rack gear formed on the lower surface of the balance arm part. A handle attached to the pinion gear is rotatably engaged, and when the handle and the pinion gear C1 are rotated, the carrier assembly is moved longitudinally along the rack gear. Apparatus according to paragraph 43.

(1→ A holder assembly is fixed to the support assembly,
9. The mounting of claim 8, wherein the holder assembly extends substantially parallel to the tonearm subassembly when the tonearm subassembly is in the rest position.

@71f#h A prevention means is attached to the holder assembly and the tone arm subassembly so as to maintain a predetermined lateral force on the needle supported by the tone arm section. 47. The apparatus according to paragraph 46.

No. 0: The anti-slip means is located outside (1) from the holder assembly.
1) a bearing holder having a cup-shaped end portion that extends over the ball bearing assembly and is large enough to accommodate the ball bearing assembly; and a matching collar assembly that is attached to the ball bearing assembly by a mounting screw. and the matching collar assembly includes a first bin extending generally vertically from the assembly and a second bin extending generally horizontally, and a portion of the first bin and the tone arm. - A thread-like member extends between a portion of the subassembly adjacent to the balance arm portion, and the slip prevention means further includes a balance weight attached to the second bin. 47 above
Equipment described in Section.

θ) The thread-like member is arranged to rotate the bearing means when the tonearm subassembly is pivoted a maximum distance from a rest position to prevent twisting of the tonearm subassembly about the support assembly. 49. The device of claim 48, wherein the device extends substantially in a horizontal plane intersecting the points , ).

a balance arm removably attached to the housing that supports the tone arm in a bidet manner; the balance arm supports an adjustable carrier assembly to which a balance weight is attached; position of the carrier assembly and balance weight along the balance arm without rotating the balance weight and without changing the position of the center of gravity of the balance weight with respect to the longitudinal axis of the balance arm due to nuclear rotation; 1. A removable balance weight assembly for applying a predetermined tracking force to a tone arm in which a pin is supported at the throat, the balance weight assembly having a drive means that engages with the balance arm to selectively change the balance weight.

(51) The instruction cursor is 1Jf of the balance arm.
51. The removable balance weight assembly according to item 50, wherein the removable balance weight assembly is slidably attached to a portion remote from the housing.

(52) A part of the mounting shoe is fixed to the housing, and the shoe member corresponds in size and shape to the substantially T-shaped flange extending from the balance arm, and when the 7 langes are inserted, the balance arm is attached to the housing. The removable balance weight assembly according to item 50 (102), characterized in that it has a generally T-shaped pocket that is removably attached to the housing.
) The carrier assembly includes a hub portion that completely surrounds a portion of the balance arm and a generally U-shaped sleeve portion that partially surrounds another portion of the balance arm, the hub portion being connected to the balance weight. 51. A removable balance according to claim 50, characterized in that the removable balance has a groove of sufficient size to receive a ring of energy-absorbing material that engages and provides sole support for the balance weight. weight assembly.

(54) The ring is made of Sordethane (Sorbothan).
54. The removable balance weight assembly according to item 53, characterized in that it is made of a material having the trade name e).

(55) The driving means is rotatably supported between the U-shaped sleeve portions and is located on the lower surface of the balance arm! A pinion gear meshing with a lug gear formed in the same manner as above, and a pinion gear attached to the pinion gear so as to rotate together with the pinion gear. and a control handle, the binion there being adapted to rotate the carrier assembly and balance weight relative to the rack gear to vary the tracking force on the pivotable tone arm. 54. The removable balance weight assembly according to clause 53.

(56) A method of attaching a pivoting tone arm and tone arm support assembly to a turntable support assembly for properly aligning a needle attached to the tone arm with respect to a rotating turntable, the method comprising: affixing a substrate of an arm support assembly to a surface of the turntable support assembly; vertically aligning the tone arm with an alignment nipple removably attached to a spindle extending from the turntable; A tone arm comprising the steps of: pivotally supporting the tone arm; and adjusting the position of the tone arm support assembly relative to the substrate to vertically align the indicated amount of the tone arm's head shell with the nipple. and how to attach the tone arm support assembly to the turntable support assembly.

57. The method of claim 56, further comprising the step of: G'7) lowering the tone arm with the nipple protruding from the indicator opening so as to properly align the tone arm with the nipple.

φ8) removing the pivoting tonearm from the support assembly and positioning an alignment fixture such that a boss extending from the fixture projects through another indicator opening in the helad shell. 57. The method according to paragraph 56 above.

(59) Place the pickup cartridge of the heradshell in a position where the cross mark formed on the transparent plate pivotally coupled to the alignment fixture aligns with the tip of the needle protruding from the pickup cart. 59. The method of clause 58, comprising the step of aligning.

[Brief explanation of the drawing]

1 is a side view of a tone arm structure constructed according to an embodiment of the present invention, FIG. 2 is a plan view of the tone arm structure shown in FIG. 1, and FIG. 3A is a tone arm structure shown in FIG. 1. Body tone arm support string (105) Three-dimensional part h [Top view, Figure 3B shows a different aspect
; Partial rono r-view of the completed tone arm support assembly;
FIG. 4 is a sectional view of the front part of the tone arm taken along line A-A' in FIG. 1, and FIG. 5A is a sectional view of the tone arm support assembly taken along line 13-B in FIG. 3A. Fifth
Figure B is a cross-sectional view of the tone arm support section taken along line C-C in Figure 3A, Figure 6 is a side view of the tone arm structure with several examples of anti-slip mechanisms, and Figure 7. 6 is an exploded view of the bearing mounting assembly adopted in the anti-slip mechanism shown in FIG. 6, and FIG. 8 is a partial side view of the quick release coupling assembly used in the embodiment of FIG. 1. The coupling assembly is shown in a separated state, FIG. 9 is a partially cut-away side view of a tone arm structure constructed in accordance with another embodiment of the invention, and FIG. FIG. 11A is a side view of a portion of the support shaft used in the embodiment; FIG. 11A is a perspective view of another embodiment of a balance weight assembly constructed in accordance with the present invention; FIG. 12 is a partial plan view of a tone arm structure constructed in accordance with a preferred embodiment of the present invention; FIG. 13 is a cross-sectional view of the balance weight assembly (1,06) taken along a plane; FIG. 14 is a top view of the balance weight assembly of FIG. 13, and FIG. 15 is a section taken along line E--E of FIG. 14. A side sectional view of the balance weight assembly;
Figure 16 is a cut end view of the balance weight assembly taken along line F-E in Figure 15, Figure 17 is a plan view of the tone arm structure in the installation process, and Figure 18 is the tone arm installation assembly. A three-dimensional exploded view; FIG. 19 is a perspective view of a needle alignment assembly suitable for coupling a pickup cartridge within a tonearm headshell; FIG.
FIG. 21 is an exploded view of the anti-slip structure used in the preferred embodiment shown in FIG. 22 is an exploded view of a preferred tone arm support assembly for use with the embodiment of FIG. 12, and FIG. 23 is a cross-sectional view taken along line G--G of FIG. 22. 10...l・-nuano, assembly, 12...no-using assembly, 14-. 14'... Big radius arm, 16... Frame portion, 18... Outer tubular member, 20... Inner tubular member, 22... Band, 24.
24'... Head shell, 30/... Nirasol for alignment, 40... Indigo part side, 40/... Fixture for alignment, 4
2...Supporting member, 46...Hollow chamber, 54...Payment shaft, 56...Cup-shaped member, 58...Conical end surface portion, 60...Pi? Tobin member, 681...
・Alignment assembly, 70'...Mounting block, 80...
- Bushing member, 80'...Cavity, 82'. 84'...Semicircular surface part, 83'...Tightening block, 86...Slide member, 88...1 screw, 1
00°102... Sleeve assembly, 110, 110'
...Mounting assembly, 114...Hub-shaped member, 12
2... Tightening ring, 130... Balance arm, 1
32... Support collar, 136... Balance weight, 138... Elastic ring, 143A to 143D...
Nylon plug, 145A-145D...Set screw tightening assembly, 144°144', 146,146'--
・Balance weight, 148°150...shaft,
16o...Holder assembly, 17°...Bearing assembly,
180, 182... Bin member, 1801... Bearing holder, 182'... Cup shaped part, 1831... Ball bearing assembly, 186... Balance weight, 186'
... Bearing collar, 192, 192' ... Thread, 194
... Arm lift assembly, 202 ... Stationary member, 2
04'...Mounting shoe member, 210...Conduit. (109)

Claims (1)

Claims: (1) A record player with a pivotable tonearm subassembly having a longitudinal axis extending from a pickup cartridge mounted at one end to a balance weight mounted at the other end. A tonearm structure for use in a recording medium W, comprising a uni-pivot bearing means supported by a record player, the uni-pivot bearing means for pivoting the tone arm subassembly about the bearing means. supporting the tone arm subassembly;
Moreover, the uni-pivot bearing means is the tone arm.
A tone arm 13 structure for a record player, characterized by having a uni-pivot bearing disposed on an imaginary horizontal line extending through the center of gravity of the subassembly υ and perpendicular to the longitudinal axis of the tone arm subassembly. body. (2) Said Yu Pipa? The tone arm sub-assembly IIVCJ is fitted with a tapered end and a tapered end. a cup-shaped support body 1 filled with fluid, the tapered end extending into the oil body and in peer-judge engagement with the cup-shaped support member. A tone arm construction body for a record reprocessing device P1 as described in Item 1 of the scope of patent application No. 81, characterized in that: (3) One end is attached to the housing and pinned to the other end. 1. A tonearm structure for a record player comprising a substantially rigid tonearm subassembly having a tonearm subassembly attached thereto, the tonearm subassembly comprising a first tubular member and a first tubular member. a second tubular member surrounding the tubular member and spaced apart from the first tubular member, both of which are connected to the housing and the pickup cartridge 1. extending between the first and second tubular members, the tonearm subassembly further includes a plurality of tubular members disposed between the first and second tubular members to prevent resonance from being transmitted through the tonearm subassembly. A tone arm structure for a record playback device, characterized by comprising attenuation means. (4) The plurality of damping means comprises a plurality of separate bands of plastic-like material spaced apart from each other at irregular intervals between the first and second tubular members. A tone arm structure for a record playback device according to claim 3. (5) The tone arm structure is a tone arm structure for a record playback device including a support assembly for pot-supporting the tone arm structure, and the tone arm structure includes a support collar and a balance weight surrounding the support collar and a part of the support collar. a balance arm extending therethrough, a pair of radially aligned grooves being formed in opposing surface portions of the support collar and balance weight; a resilient deformation extending between the pair of radially aligned grooves and engaging u'If'<+ to support and prevent vibrations from being transmitted between the balance weight and the balance arm; 1. A ring arm structure for a record playback device, the key feature being that the structure is equipped with a damping means consisting of a ring capable of reducing noise. (6) A tone arm structure for a record playback device, which includes a support assembly that supports the tone arm structure in a fixed manner, and surrounds a support collar, the supporting force →-, and a part of the support collar. and a balance arm extending through balance weights 7'1, which are spaced apart from each other in the circumferential direction. The tone arm structure further has a hole extending in a radial direction with a vertical radius, and the tone arm structure further supports the balance weight and prevents force and vibration from being transmitted between the balance weight and the balance arm. damping means extending between said balance weight and said support horn, said damping means being formed from an elastically deformable material inserted in alignment within said radially extending holes; A tone arm structure for a record playback device, characterized by comprising a circular plug. (7) The damping means further includes a screw and plug assembly disposed in each of the semi-transverse holes, the plugs contacting the deformable plug to move the front F plug against the support collar. 7. The tone arm structure for a record reproducing device according to claim 6, wherein the tone arm structure is selectively compressed. (8) a support assembly extending from 71/- of the record player; and a housing portion having a longitudinal axis and disposed adjacent the support assembly and extending outwardly from one side of the housing portion. a tone arm portion extending to the housing portion and supporting a pickup cartridge and a needle attached to the cartridge; and a Luharance arm portion extending outwardly from the opposite side of the housing portion and supporting a balance weight having a central axis. arm·
a subassembly extending between the tonearm subassembly and the support assembly and capable of vertically pivoting the tonearm subassembly without generating an opposing restoring force; so that the tone arm subassembly (5) passes through the center of the assembly and is connected to the longitudinal axis of the tonearm subassembly. ; Unipier 1 with a pi-bit point that coincides with a virtual horizontal helix extending across f;
', 7) A tone arm structure for a record reproducing device, comprising a bearing means. (9) The tone arm part includes a first tubular member and a second tubular part surrounding the tubular member of Part 1 and disposed at a distance of #L from the first tubular member in the radial direction. Have %
8. The tone arm further comprises a plurality of separate damping members spaced apart from each other between the first and second tubular members. The tone arm structure for a record playback device described in . αO The damping member comprises a plurality of irregularly spaced bands formed from an energy damping material so as to surround the first tubular member and contact and support the second tubular member. A tone arm structure for a record playback device according to claim 9. a) The first tubular member is connected to the second tubular member (6
) is concentric within the 1. 10. The tone arm structure for a record reproducing apparatus i<7 according to claim 9, characterized in that the signal line extends between both ends of the first tubular member. (l) The layer of silicone rubber is the lit 13
The tone arm structure for a record reproducing device according to item 10 of the scope of patent MWf, characterized in that the tone arm structure is filled in a plurality of gaps formed between the thread and the groove. The cartridge support means is engaged with one end of the tone arm portion so as to support the cartridge and the needle at a center of gravity of the cartridge that is horizontally aligned with one center of the tone arm portion. A tone arm structure for a record playback device according to claim 8. 1) The edge supporting means is comprised of a bracket member in the shape of an abbreviation having a sleeve-shaped end fixed to the opposite end of the tone arm portion, and the bracket member in the shape of an abbreviation is fixed to the opposite end of the tone arm portion. A leg portion of the brush 1 has several edges at its end and extends substantially vertically above the tone arm portion, and a second leg portion to which an IC is attached to the first leg portion and extends substantially parallel to the tone arm portion. 451 to have legs (
That's it! i! r
: fiif': Tone arm structure for record playback device. 0→ said second leg is connected to said first leg
and a second part extending at an angle to the part K of 14110 and the part K of 14110, and the cartridge 7 and the needle 1]1r of the second leg. Claim 2, characterized in that it is in fixed engagement with the tone arm portion 1 and the second portion and extends at an angle Jjl'7 with respect to a longitudinal axis extending through the tone arm portion. A tone arm structure for a 17-cord re-coupling device as described in item 14 of the writing brush. (]l'I)T'ii A coupling means for removably merging the tonearm portion with the housing portion is attached to the tonearm subassembly. The tone arm structure for a record playback device according to item 8. The coupling means α is rotatably attached to the enlarged end portion of the tone arm portion, is threaded along the inner surface (with a locking ring), is fixed to the housing portion, and is fixed to the tone arm portion. and a hollow mounting member threaded on an outer surface of an opposite end thereof, the tightening ring being adapted to engage the first arm portion with the housing portion. 17. The tone arm structure for a record playback device according to claim 16, wherein the tone arm structure engages with the threaded portion. The enlarged end portion of the tonearm portion has a radially outwardly extending flange, the tightening ring has a radially inwardly extending flange, and the radially outwardly extending flange of the tonearm portion has a radially outwardly extending flange. 18. The apparatus of claim 17, wherein the device engages the radially inwardly extending flange of the clamping ring to retain the clamping ring on the tonearm portion. A patent characterized in that the Hau Nong part has a hollow lid-shaped end member and a sleeve-shaped body member attached to the end member, forming a chamber extending longitudinally within the housing part. The tone arm structure for a one-node playback device according to claim 8(9). (a) the support assembly has an upright cup-shaped end extending into the chamber formed in the housing portion, and a fluid such as silicone is directed to one of the Tsyzzo-shaped ends of the support assembly; 20. The tone arm structure for a record reproducing device according to claim 19, wherein the tone arm structure satisfies the following. (c) the uni-bi-jet bearing means comprises a vertically extending pivot bin assembly attached to the cap-shaped end member of the housing and extending into the cup-shaped end of the support assembly; , the pivot bin assembly is capable of handling said force 5. ．． 21. The tone arm structure for a record reproducing apparatus according to claim 20, further comprising an end portion with a cheek that pivotably engages with a recess formed at the end of the tap-like end portion. ) Said BiyJ? The bin assembly includes a support bin member secured to the lid-shaped end member of the nozzle part, and a tipped bin having a rounded portion extending into the conical end of the support bin member. 22. The tone arm structure for a record playback device according to claim 21, comprising: (10). (c) Contact M between the pivot bin assembly and the recess
21. The tone arm structure for a record reproducing apparatus according to claim 20, wherein the Jt point coincides with the center of gravity of the tone arm subassembly. (c) The housing portion has a conical outer surface, and the tone arm portion and the balance arm portion extend substantially straight from the outer surface of the housing portion, and the outer surface VCl30
9. The tone arm structures for a record reproducing apparatus according to claim 8, wherein the tone arm structures are arranged at intervals of .degree. (c) The side portions are arranged so as to generate a restoring force that opposes the lateral piaget movement of the tone arm subassembly.
9. A tonearm structure for a record player as claimed in claim 8, wherein 9977 means extend outwardly from both sides of said tonearm subassembly. 0Q said lateral balance means extends from said housing portion on either side of the longitudinal axis of said one-arm subassembly and extends from a shaft member which is a pair of threaded threads supporting respective attached balance weights; No, each of the threaded shaft members forms an angle with the tone arm section and the balance arm section, and the threaded shaft members form a common '7J of the pair of shaft members.
A patent characterized in that the center is located in a horizontal plane vertically above a horizontal plane passing through the H-direction axis of the tone arm subassembly when the one-arm subassembly is in a rest position. A toe/arm structure for a record player according to claim 25. (b) a first portion having a first gauge of a signal line extends from the cartridge through the tonearm portion of the tonearm subassembly; A tone arm structure for a record player as set forth in claim 8 of the patent, wherein a second portion extends from the tone arm portion through the housing portion and is in contact with the support assembly. body. (c) the first portion of the signal line is formed by a wire having a gauge value of about 30, and the second portion of the signal line is formed by a wire having a gauge value of about 44;
28. The tone arm structure for a record reproducing device according to claim 27, wherein the tone arm structure is formed of a type of wire. (c) Claim 8g2, wherein the threaded shaft members form substantially right angles with the tone arm section and the balance arm section, respectively.
The tone arm structure for a record playback device according to item 6. (Inc.) Each of the threaded shaft members and the balance weight attached to the shaft members have a center of gravity that corresponds to an imaginary vertical plane extending through the tone arm subassembly, and The record stated in item 26 of the scope of the patent application, characterized in that the vertical plane extends substantially parallel to the longitudinal axis of the needle and substantially orthogonal to the cantilever of the needle (13) Tone arm structure for playback equipment. (31) each threaded shaft member and balance weight assembly attached to the shaft member has a center of gravity that is different from a virtual vertical plane extending through the tone arm subassembly; 11, wherein the surface is displaced in a clockwise direction by an angle of approximately 23 degrees with respect to another imaginary vertical plane extending orthogonally to a longitudinal line east through said tonearm subassembly. 26. The tone arm structure for a record playback device according to item 26. (32) The support assembly has a substantially straight support shaft extending vertically downwardly from the housing portion, and an elongated slot secured to the record player and large enough to pass the support shaft. 9. The tone arm structure for a record reproducing device according to claim 8, further comprising a substrate. (33) The support assembly further includes the support shaft (1
4) A cover 01q l, and a sliding part side provided on one side of the substrate separated from the housing part by M, is slidably attached to the substrate and fixed to the slide member. 33. The tone arm for a record playback device f& according to claim 32, further comprising a mounting block assembly and a mounting block assembly, wherein the mounting block assembly and the slide section side overlap on both sides of the elongated slot. Structure. (34) The mounting block assembly has a cavity in which a tightening block is slidably disposed, and the cavity, the tightening professional, and the support shaft are inserted into the mounting block assembly. the mounting block further includes an engagement means for biasing the opposed semicircular round surfaces into frictional contact with the support shaft; 34. A tone arm structure for a record playback device according to claim 33, further comprising: (35) the engagement means comprises a set screw, the set screw being inserted through a hole in the mounting block assembly so as to generate a force that, when rotated, presses the clamping block into frictional contact with the support shaft; 35. The tone arm structure for a record reproducing apparatus according to claim 34, wherein the tone arm structure extends and comes into contact with the tightening block. 06) The tone arm structure for a record reproducing device according to claim 35, wherein the tightening block is made of a material such as nylon. (37) A patent characterized in that, when the set screw is pulled, a disengagement means for pushing the retainer out of contact with the support shaft is disposed between a side wall of the cavity and the tightening block. The tone arm structure for a record playback device according to item 35, 't'fJ range. (38) The one-saw regeneration device according to claim 37, wherein the detachment means comprises at least one spring compressed between the side wall of the cavity and the clamping block. Yukikawa tone arm structure. 09) The mounting block assembly has nI to the substrate.
The repositioning lock assembly and the slide member 1c are sufficient to accommodate a threaded bin member mounted on a support flange extending from the base plate for selective rotation. 34. The tone arm structure for a cord reproducing device according to claim 33, wherein the tone arm structure has a threaded hole having a size of a thread. (40) A carrier supporting the hollow balance weight assembly so as to follow the balance weight assembly, Ir
! a solid body at least partially surrounds the balance arm M, and the carrier assembly maintains the position of the center of gravity IL of the balance weight assembly with respect to the longitudinal line )1ζ11 passing through the balance arm. The record reproducing device as set forth in claim 8, further comprising a drive means that engages with the balance arm portion so as to selectively change the positions of the carrier assembly and the balance weight assembly. Tone arm structure for. (41) The housing part (1) of the balance arm part
7) Record playback according to claim 40, characterized in that an indicating cursor is slidably placed in several positions at a portion away from the record playback = 1! ! ,, useful tone arm structure. (42) Claim 40, characterized in that the balance arm portion is arranged and freely attached to a mounting shoe member fixed to the C17 song portion, and has a substantially rectangular cross-sectional shape. The tone arm structure for the record playback device 5 as described in 2. (13) the carrier assembly has a hub portion that completely surrounds the first portion of the balance arm portion and a U-shaped sleeve portion that partially surrounds the second portion of the balance arm portion; The hub portion has a groove of energy absorbing material extending radially outwardly between the hub portion and the balance weight assembly; and a groove sufficiently large to receive a mating ring.゛Tone arm structure for a record reproducing device according to item 42. (44) The drive means is rotatably supported between both legs of the U-shaped sleeve part and engages with a relatively fixed rack gear formed on the lower surface of the balance arm (18). a pinion gear and a handle attached to the pinion gear for rotation therewith, the handle and the pinion gear being adapted to longitudinally move the carrier assembly along the rack gear when rotated; A tone arm structure for a record playback device according to claim 43. (45) a holder assembly is fixed to the support assembly;
9. The tone arm structure for a record player according to claim 8, wherein the holder assembly extends substantially parallel to the tone arm subassembly when the tonearm subassembly is in a rest position. body. (46) Anti-slip means is attached to the holder assembly and the tone arm subassembly so as to maintain a predetermined lateral force on the needle supported by the tone arm section. Scope of patents sought No. 45
A tone arm structure for a record playback device as described in 2. (47) said anti-slip means (Q) extending outwardly from said holder assembly (η) with a force of sufficient magnitude to accommodate a ball bearing assembly; A collar assembly for one unit is attached to the ball bearing assembly without mounting. and a pin of the organ 2 extending in the horizontal direction, and the first
A thread-like portion extends between a portion of the second bin and a portion of the tone arm subassembly adjacent to the balance arm portion, and the anti-slip means is further attached to the second bin. 47. The tone arm structure for record reproduction wave fEf according to claim 46, characterized in that the tone arm structure is provided with a balanced weight. 08) The thread-like member prevents the tension of the bearing means when the tonearm subassembly is pivoted a maximum distance from a rest position to prevent the tonearm subassembly from twisting about the support assembly. 47. The tone arm structure for a record reproducing device according to claim 47, wherein the tone arm structure extends substantially within a horizontal plane intersecting the point G.