JPS5927026B2 - record player - Google Patents
record playerInfo
- Publication number
- JPS5927026B2 JPS5927026B2 JP4264475A JP4264475A JPS5927026B2 JP S5927026 B2 JPS5927026 B2 JP S5927026B2 JP 4264475 A JP4264475 A JP 4264475A JP 4264475 A JP4264475 A JP 4264475A JP S5927026 B2 JPS5927026 B2 JP S5927026B2
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- cylindrical rotor
- turntable
- record player
- stator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/20—Driving; Starting; Stopping; Control thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
- H02K41/025—Asynchronous motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electromagnetism (AREA)
- Rotational Drive Of Disk (AREA)
Description
【発明の詳細な説明】
本発明は回転子の外周縁の一部分に固定子を有するホノ
モータを使用したレコードプレーヤに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a record player using a honomotor having a stator on a portion of the outer periphery of the rotor.
従来のかかるレコードプレーヤは、第１図に示すように
、シャフト５に固定された回転子導体支持板２にアルミ
、銅等の非磁性、良導電体で作られた円筒回転子導体１
を取付け、円筒回転子導体１の円周の−部に回転子を駆
動するため公知の手段により巻線された固定子３を有し
、ターンテーブル４がシャフト５とテーパ結合によりシ
ャフトと一体に回転するものであつた。In the conventional record player, as shown in FIG. 1, a cylindrical rotor conductor 1 made of a non-magnetic, highly conductive material such as aluminum or copper is mounted on a rotor conductor support plate 2 fixed to a shaft 5.
A stator 3 is attached to the circumference of the cylindrical rotor conductor 1 and has a stator 3 wound thereon by known means for driving the rotor, and a turntable 4 is integrally connected to the shaft 5 by tapered coupling. It was a rotating thing.
この場合、円筒回転子導体１は固定子３の励磁により第
５図に示すような固定子磁極方向の力Ｆを受ける。In this case, the cylindrical rotor conductor 1 receives a force F in the direction of the stator magnetic poles as shown in FIG. 5 due to the excitation of the stator 3.
この固定子磁極方向の力Ｆは、シャフト５に対し回転力
Ｆ１とラジアル方向の力Ｆ２に分解することができる。
ラジアル方向のＦ２は電源周波数の２倍の周波数（以下
２ｆと言う）で変動し円筒回転子導体１を振動させる。
固定子が回転子の全周に設けられている普通のモータで
は、Ｆ２の力は対向位置に発生する力により打消される
が、本モータでは固定子が回転子の一部分であるがため
に、回転子に２ｆの振動が発生しレコードプレーヤのＳ
Ｎ比を悪化させる原因となる。This force F in the stator magnetic pole direction can be decomposed into a rotational force F1 and a radial force F2 with respect to the shaft 5.
F2 in the radial direction fluctuates at a frequency twice the power supply frequency (hereinafter referred to as 2f), causing the cylindrical rotor conductor 1 to vibrate.
In a normal motor in which the stator is provided around the entire circumference of the rotor, the force F2 is canceled by the force generated at the opposing position, but in this motor, the stator is a part of the rotor, so A vibration of 2f occurs in the rotor and the S of the record player
This causes deterioration of the N ratio.
そのため、従来は回転子の振動を減少させるために回転
子導体支持板２の肉厚をできるだけ厚くし、重量を重く
しているために回転子が高価になる欠点があつた。また
円筒回転子導体１は帯状アルミあるいは銅板を所定の寸
法に切断し回転子導体支持板２に巻付けその両端面を溶
接等により接続したり、あるいはドーナツ状のアルミま
たは銅板をプレスにより円筒形にし回転子導体支持板２
に取付けられているが、前者の場合には接続面の変形等
により固定子の空隙が広くなりモータ効率が悪化し、後
者では回転子導体の材料歩留りが悪くなり高価になる欠
但があつた。本発明は上記従来の欠点を解消するもので
あり、本発明のプレーヤの一実施例構成を第２図に示す
。Therefore, conventionally, in order to reduce the vibrations of the rotor, the thickness of the rotor conductor support plate 2 has been made as thick as possible and the weight has been increased, which has resulted in the disadvantage that the rotor is expensive. The cylindrical rotor conductor 1 can be made by cutting a band-shaped aluminum or copper plate into a predetermined size, wrapping it around the rotor conductor support plate 2, and connecting the two end faces by welding or the like, or by pressing a donut-shaped aluminum or copper plate into a cylindrical shape. Nishi rotor conductor support plate 2
However, in the former case, the gap in the stator widens due to deformation of the connection surface, resulting in a decrease in motor efficiency, while in the latter case, the material yield of the rotor conductor deteriorates, making it expensive. . The present invention solves the above-mentioned conventional drawbacks, and the configuration of an embodiment of the player of the present invention is shown in FIG.
本発明のプレーヤはターンテーブル４を筒形回転子６の
外周部で支持したレコードプレーヤにおいて筒形回転子
６をＯ、２ｍ７！Ｌ〜２．０ｍｍのアルミ板、銅板等の
非磁性、良導電体の円板でプレス加工により製作し、筒
形回転子６の外周部のターンテーブル支持部に複数個の
突起Ｔを設けた構成である。回転子に受けるシャフトに
対しラジアル方向の力Ｆ２はＦＯｓｉｎωｔ（但しω＝
２πＸ２ｆ）で変動し、粘性抵抗を無視すれば運動方程
式はとなる。The player of the present invention is a record player in which the turntable 4 is supported by the outer circumference of the cylindrical rotor 6, and the cylindrical rotor 6 is O, 2m7! It was manufactured by pressing a non-magnetic, good conductive disc such as an aluminum plate or a copper plate with a thickness of L~2.0 mm, and a plurality of protrusions T were provided on the turntable support part on the outer periphery of the cylindrical rotor 6. It is the composition. The force F2 in the radial direction on the shaft that is applied to the rotor is FOsinωt (where ω=
2π×2f), and if viscous resistance is ignored, the equation of motion is as follows.
但しｍ：回転子の質量、ｋ：ばね定数（Ｘ方向に単位長
さを変位させるに要する力）、ｘ：変位
この式より定常状態の振動振幅Ｘを求めるととなる。However, m: mass of the rotor, k: spring constant (force required to displace unit length in the X direction), x: displacement From this equation, the vibration amplitude X in a steady state is determined.
第４図は上記運動方程式を説明するための図である。FIG. 4 is a diagram for explaining the above equation of motion.
本ホノモータでは固有振動数ωｎ／２πは５０〜８０Ｈ
ｚ程度でありω／ωｎ〉１．０である。In this hono motor, the natural frequency ωn/2π is 50 to 80H.
z, and ω/ωn>1.0.
この場合ｍω２〉ｋであるため質量ｍを増すことにより
振幅Ｘを減少させることができる。これらのことより筒
形回転子の外周部分でターンテーブルを支持することに
より筒形回転子の質量を等価的に増したと同じ結果とな
り２ｆ振動を減少させることができる。通常ターンテー
ブル質量は回転子質量に比べ非常に大きいため回転子の
質量により２ｆ振動の大きさが変化することは少ない。
これらの結果よりターンテーブルを回転子の外周部に支
持するレコードプレーヤにおいては筒形回転子を軽量に
することが可能であり従来のように回転子導体支持板２
を設け、その肉厚をできるだけ厚くし、重量を重くする
ことなく、筒形回転子６をアルミ、銅等の非磁性、良導
電体の薄板円板でプレス加工により製作することができ
る。その板厚はターンテーブルを支持するに必要な強度
と固定子の空隙による電気的特性により決定され、０．
２ｍｍ〜２．０ｍ１のものが適当である。プレス加工に
より製作した筒形回転子６は歪を生じその外周部で支持
したターンテーブルの表面に面振れが発生する。この面
振れを防止するため第２図、第３図に示すように筒形回
転子の外周部のターンテーブル支持部に突起７を設け筒
形回転子をシャフトに取付けた後、突起面を切削加工し
筒形回転子の歪によるターンテーブルの面振れを防止す
る。本発明のレコードプレーヤでは振動特性を悪化させ
ることなく筒形回転子を薄板円板でプレス加工により製
作するため、非常に安価に製作することができ、従来の
回転子導体支持板と回転子導体を一体に製作するため回
転子導体部の仕上げ寸法精度が向上しモータ性能が向上
する。In this case, since mω2>k, the amplitude X can be decreased by increasing the mass m. From these facts, by supporting the turntable on the outer peripheral portion of the cylindrical rotor, the 2f vibration can be reduced with the same result as equivalently increasing the mass of the cylindrical rotor. Normally, the mass of the turntable is much larger than the mass of the rotor, so the magnitude of the 2f vibration hardly changes depending on the mass of the rotor.
From these results, it is possible to reduce the weight of the cylindrical rotor in a record player in which the turntable is supported on the outer periphery of the rotor.
The cylindrical rotor 6 can be manufactured by press working from a thin disc of non-magnetic, highly conductive material such as aluminum or copper without increasing the wall thickness and increasing the weight. The thickness of the plate is determined by the strength required to support the turntable and the electrical characteristics due to the gap in the stator.
A size of 2 mm to 2.0 m1 is suitable. The cylindrical rotor 6 manufactured by press working is distorted, and surface runout occurs on the surface of the turntable supported by its outer periphery. In order to prevent this surface runout, as shown in Figures 2 and 3, protrusions 7 are provided on the turntable support on the outer periphery of the cylindrical rotor, and after the cylindrical rotor is mounted on the shaft, the protruding surface is cut. This machine prevents the turntable from wobbling due to distortion of the cylindrical rotor. In the record player of the present invention, the cylindrical rotor is manufactured by pressing a thin disc without deteriorating the vibration characteristics, so it can be manufactured at a very low cost, and the rotor conductor supporting plate and rotor conductor are Because they are manufactured in one piece, the finished dimensional accuracy of the rotor conductor part is improved, which improves motor performance.
またプレス加工により生ずるターンテーブルの面振れは
筒形回転子の外周のターンテーブル支持部に複数個の突
起を設けることにより防止することができる。Further, surface runout of the turntable caused by press working can be prevented by providing a plurality of protrusions on the turntable support portion on the outer periphery of the cylindrical rotor.
第１図は従来のレコードプレーヤの一例を示す断面図、
第２図は本発明のレコードプレーヤの一実施例における
断面図、第３図は本発明のレコードプレーヤにおける筒
形回転子の上面図、第４図はターンテーブルの振動状態
を示す説明図、第５図は第１図のＡ−Ｎ線における断面
での力の方向を示す説明図である。
３・・・・・・固定子、４・・・・・・ターンテーブル
、５・・・・・・シヤフト、６・・・・・・筒形回転子
、７・・・・・・突起。FIG. 1 is a sectional view showing an example of a conventional record player.
FIG. 2 is a sectional view of an embodiment of the record player of the present invention, FIG. 3 is a top view of the cylindrical rotor in the record player of the present invention, and FIG. 4 is an explanatory diagram showing the vibration state of the turntable. FIG. 5 is an explanatory diagram showing the direction of force in a cross section taken along line AN in FIG. 1. 3... Stator, 4... Turntable, 5... Shaft, 6... Cylindrical rotor, 7... Protrusion.
Claims (1)
モータを使用し、ターンテーブルを前記筒形回転子の外
周部で支持するレコードプレーヤにおいて、前記筒形回
転子を０．２ｍｍ〜２．０ｍｍのアルミ、銅等の非磁性
、良導電体の円板でプレス加工により製作し、かつ前記
プレス加工で製作した筒形回転子の外周部のターンテー
ブル支持部に複数個の突起を設けたことを特徴としたレ
コードプレーヤ。1. In a record player that uses a honomotor having a stator on a part of the outer peripheral edge of a cylindrical rotor and supports a turntable on the outer periphery of the cylindrical rotor, the cylindrical rotor has a diameter of 0.2 mm to 2.0 mm. A cylindrical rotor was produced by press processing using a 0mm thick disc of non-magnetic, highly conductive material such as aluminum or copper, and a plurality of protrusions were provided on the turntable support portion on the outer periphery of the cylindrical rotor produced by the press processing. A record player characterized by:
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4264475A JPS5927026B2 (en) | 1975-04-07 | 1975-04-07 | record player |
| US05/672,002 US4072315A (en) | 1975-04-07 | 1976-03-30 | Turntable direct-drive system |
| CA249,283A CA1052282A (en) | 1975-04-07 | 1976-03-31 | Turntable direct-drive system |
| GB12862/76A GB1540162A (en) | 1975-04-07 | 1976-03-31 | Turntable drive systems |
| DE19762614853 DE2614853A1 (en) | 1975-04-07 | 1976-04-06 | DRIVE SYSTEM WITH ONE DIRECT DRIVE FOR A PLATTER |
| CH430676A CH611447A5 (en) | 1975-04-07 | 1976-04-06 | |
| IT7621969A IT1063859B (en) | 1975-04-07 | 1976-04-06 | DIRECT CONTROL SYSTEM OF TURNTABLE PLATE WITH CYLINDRICAL ROTOR WITH STATORS FROM OPPOSITE SIDES |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4264475A JPS5927026B2 (en) | 1975-04-07 | 1975-04-07 | record player |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS51117004A JPS51117004A (en) | 1976-10-14 |
| JPS5927026B2 true JPS5927026B2 (en) | 1984-07-03 |
Family
ID=12641710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4264475A Expired JPS5927026B2 (en) | 1975-04-07 | 1975-04-07 | record player |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5927026B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6501130B2 (en) * | 2017-07-10 | 2019-04-17 | ティアック株式会社 | Record player |
-
1975
- 1975-04-07 JP JP4264475A patent/JPS5927026B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS51117004A (en) | 1976-10-14 |
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