JPH0458752A - Rotary yoke type brushless motor subjected to noise reduction - Google Patents
Rotary yoke type brushless motor subjected to noise reductionInfo
- Publication number
- JPH0458752A JPH0458752A JP16895490A JP16895490A JPH0458752A JP H0458752 A JPH0458752 A JP H0458752A JP 16895490 A JP16895490 A JP 16895490A JP 16895490 A JP16895490 A JP 16895490A JP H0458752 A JPH0458752 A JP H0458752A
- Authority
- JP
- Japan
- Prior art keywords
- stator
- hole
- magnet
- brushless motor
- type brushless
- 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.)
- Granted
Links
- 239000002184 metal Substances 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 229910001369 Brass Inorganic materials 0.000 abstract description 4
- 239000010951 brass Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000005534 acoustic noise Effects 0.000 description 1
- 239000003522 acrylic cement Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Motor Or Generator Frames (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Brushless Motors (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、携帯用音響機器に用いて好適な低ノイズ化
した回転ヨーク型ブラシレスモータに間する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a low-noise rotary yoke type brushless motor suitable for use in portable audio equipment.
（従来の技術）
従来より、ヘッドホンステレオ等の音響機器に搭載され
る偏平な回転ヨーク型ブラシレスモータは、基本構造と
して第４図に示すようなものがある。(Prior Art) Conventionally, a flat rotary yoke type brushless motor mounted on an audio device such as a headphone stereo has a basic structure as shown in FIG.
すなわち、複数個の電機子コイルを有する薄いステータ
ｌと、このステータ１を間にそれぞれ空隙を介して配し
たマグネット２、回転ヨーク３とからなるロータＲと、
このロータＲを前記ステータ１の透孔１１ａに透したロ
ータホルダ４を介して支持するシャフト５と、このシャ
フト５を軸受６．７およびこの軸受６．７を支持するメ
タルホルダ８を介して回転自在に支承すると共に、前記
ステータの外周部分を保持したブラケット９からなるも
ので、図中１０はメタルホルダに配された受板て、シャ
フト５０基端をピボット支承するものである。That is, a rotor R is made up of a thin stator L having a plurality of armature coils, a magnet 2 and a rotating yoke 3, each of which has the stator 1 interposed therebetween, and
A shaft 5 supports this rotor R via a rotor holder 4 passed through a through hole 11a of the stator 1, and this shaft 5 is rotatable via a bearing 6.7 and a metal holder 8 that supports this bearing 6.7. The shaft 50 is supported by a bracket 9 which holds the outer circumferential portion of the stator. In the figure, reference numeral 10 denotes a receiving plate disposed on a metal holder, which pivotally supports the base end of the shaft 50.
〈発明が解決しようとするｆｉｌｌ）
ヘッドホンステレオプレーヤー等の携帯用音響機器の最
近の薄型志向に伴ない、上記のような回転ヨーク型ブラ
シレスモータも、厚み３ＩｌｌＩ台の薄型化が要求され
るようになると、ステータ１も巻線コイルを一部モール
ドしたものより、厚膜ファインパターンコイル等の印刷
配線板が多用されている。<Fill to be Solved by the Invention) With the recent trend toward thinner portable audio equipment such as headphone stereo players, the rotating yoke type brushless motor as described above is also required to be as thin as 3IllI in thickness. Therefore, for the stator 1, a printed wiring board such as a thick film fine pattern coil is often used rather than a partially molded winding coil.
ところが、この厚膜ファインパターンコイルからなるス
テータｌは、厚みが０．４履閤程度しかないので、通電
時に全体的に振動してスピーカの役目をしてしまい、比
較的大きな音響ノイズが発生する。この振動の一部は空
隙を介して回転ヨーク３を振動させ、メカニカルノイズ
として外部に放射される。回転ヨーク娶ブラシレスモー
タは、図面から判断てきるようにオーブン型のため、こ
のメカニカルノイズを閘じ込めることができず、大きな
問題のひとつとしてクローズアップされている。このメ
カニカルノイズが外方に漏れないようにするには、モー
タ全体をカバーで被う必要があるが、完全ではなく高さ
面で不利となる。However, since the stator l made of thick-film fine pattern coils is only about 0.4 mm thick, the entire stator vibrates when energized and acts as a speaker, generating relatively large acoustic noise. . A part of this vibration vibrates the rotary yoke 3 through the gap and is radiated to the outside as mechanical noise. As can be seen from the drawings, brushless motors with rotating yoke are oven-type, so this mechanical noise cannot be contained, and this has been highlighted as one of the major problems. In order to prevent this mechanical noise from leaking outward, it is necessary to cover the entire motor with a cover, but it is not completely covered and is disadvantageous in terms of height.
二の発明は上記のような課題を簡単な構造により解決し
、極めて低ノイズ化した回転ヨーク型ブラシレスモータ
を提供しようとするものである。The second invention aims to solve the above problems with a simple structure and provide a rotating yoke type brushless motor with extremely low noise.
（課題を解決するための手段）
この発明は、厚膜ファインパターンコイルのり一ト引回
しの関係上、効率を落とすことなくステータの透孔がマ
グネットの内径よりさらに内側にてきることに着眼して
創成したもので、すなわち、上記従来のような構成の回
転ヨーク型ブラシレスモータにおいて、前記ステータの
自由端である透孔近傍に高密度金属部材を配したもので
ある。(Means for Solving the Problems) This invention focuses on the fact that the through holes of the stator can be placed further inward than the inner diameter of the magnet without reducing efficiency due to the routing of thick film fine pattern coil glue. In other words, in the rotary yoke type brushless motor having the conventional structure described above, a high-density metal member is arranged near the through hole at the free end of the stator.
（作用）
上記のようにすると、高密度金属部材はステータの通電
による振動を減衰させる働きがある。(Function) When configured as described above, the high-density metal member has a function of damping vibrations caused by energization of the stator.
（実施例）
以下、この発明の実施例を第１図に基づいて説明するが
、従来例である第４図と同等なものこよ同一符号を記し
である。(Example) Hereinafter, an example of the present invention will be described based on FIG. 1, and the same reference numerals are used to indicate the same parts as those in FIG. 4, which is a conventional example.
第１図においてステータ１１は中央に透孔１１ａを設け
ると共に、複数個の電機子コイルを印刷配線した厚膜フ
ァインパターン板で形成され、外周部分がブラケット９
に一部モールドで設けたステータ保持部９ａに固着され
る。このブラケットの中央には、含油軸受６．７を嵌着
した黄銅製のメタルホルダ８がかしめ等の手段により固
着される。この含油軸受６．７にシャフト５が回転自在
に支承され、このシャフト５には出力部をプーリーに形
成したロータホルダ４が前記ステータ１１の透孔１１ａ
を透して圧入されており、このロータホルダ４の段部４
ａには希土類マグネット２がマグネットケース２ａを介
して、さらにケイ素鋼板製の回転ヨーク３が前記ステー
タ１１を間にして、それぞれ空隙を介して製着されてい
る。In FIG. 1, the stator 11 has a through hole 11a in the center and is formed of a thick film fine pattern board on which a plurality of armature coils are printed and wired, and the outer peripheral portion is formed by a bracket 9.
It is fixed to a stator holding portion 9a which is partially molded. A brass metal holder 8 fitted with an oil-impregnated bearing 6.7 is fixed to the center of the bracket by caulking or other means. A shaft 5 is rotatably supported by this oil-impregnated bearing 6.7, and a rotor holder 4 having an output portion formed as a pulley is attached to the shaft 5 through the through hole 11a of the stator 11.
The stepped portion 4 of the rotor holder 4 is press-fitted through the rotor holder 4.
A rare earth magnet 2 is attached via a magnet case 2a, and a rotating yoke 3 made of a silicon steel plate is attached to the magnet case 2a with a gap therebetween, with the stator 11 in between.
このステータ１１の透孔１１ａは、電機子コイルの引回
しリード配置パターン用として、さらにマグネット２の
内径２ｂより内側になるように設定されてあり、ここに
（すなわち、マグネットケース２ａとマグネット２の厚
み及びロータホルダ４の段部４ａて囲まれた空間に）黄
銅リングからなる高密度金属部材１２をアクリル系粘着
材１３て固着したものである。The through hole 11a of the stator 11 is set so as to be inside the inner diameter 2b of the magnet 2 for the armature coil routing lead arrangement pattern. A high-density metal member 12 made of a brass ring is fixed with an acrylic adhesive material 13 in the space surrounded by the stepped portion 4a of the rotor holder 4.
第２図は上記実施例のモータの騒音特性を示したもので
、第３図に示す従来のモータの騒音特性に比へ、大幅な
ノイズ減少が得られたことが判断できる。FIG. 2 shows the noise characteristics of the motor of the above embodiment, and it can be seen that a significant reduction in noise has been obtained compared to the noise characteristics of the conventional motor shown in FIG.
上記高密度金属部材は、黄銅に限らず５ＵＳ３０４クラ
スの非磁性ステンレスや鉛、タングステン等の応用も考
えられる。The high-density metal member is not limited to brass, but may also be made of 5US304 class non-magnetic stainless steel, lead, tungsten, etc.
（発明の効果）
この発明は、上記のように厚膜ファインパターンコイル
からなるステータの透孔近傍に、高密度金属部材を配す
るという簡単な構成により、ロータの通電時に発するス
テータの振動によるメカノイズを封し込めることができ
、オーブン型である回転ヨーク型ブラシレスモータであ
っても低ノイズ化が図られることになる。(Effects of the Invention) As described above, this invention has a simple configuration in which a high-density metal member is placed near the through hole of the stator made of thick-film fine pattern coils, thereby reducing the mechanical noise caused by the vibration of the stator when the rotor is energized. This means that noise can be reduced even in oven-type rotary yoke-type brushless motors.
なお、上記高密度金属部材は、電機子コイルのトルクの
発生に寄与する部分に配置するものではないので、性能
上特に問題になることはない。Note that the high-density metal member is not placed in a portion that contributes to the generation of torque in the armature coil, so it does not pose any particular problem in terms of performance.
第１Ｉ！Ｉは本発明の回転ヨーク型ブラシレスモータの
要部断面図、第２図は本発明の同モータの騒音特性図、
第３図は従来の同モータの騒音特性図、そして第４図は
従来の同モータの要部断面図である。
２はマグネット
３は回転ヨーク
４はロータホルダ
５はシャフト
６．７は軸受
８はメタルホルダ
９はブラケット
１１はステータ
１２は高密度金属部材
特許出願人 東京パーツ工業株式会社
図面の浄書（内容に変更なし）
第
図
第
図
手続補正音（方式）
手続補正音1st I! I is a cross-sectional view of the main parts of the rotating yoke type brushless motor of the present invention, FIG. 2 is a noise characteristic diagram of the same motor of the present invention,
FIG. 3 is a noise characteristic diagram of the conventional motor, and FIG. 4 is a sectional view of the main part of the conventional motor. 2 is a magnet 3 is a rotating yoke 4 is a rotor holder 5 is a shaft 6. 7 is a bearing 8 is a metal holder 9 is a bracket 11 is a stator 12 is a high-density metal member Patent applicant Tokyo Parts Kogyo Co., Ltd. Reprint of drawings (no changes to the content) ) Diagram diagram procedural correction sound (method) procedural correction sound
Claims (1)
ァインパターンからなるステータと、このステータを間
にそれぞれ空隙を介して配したマグネットと、回転ヨー
クとからなるロータと、このロータを前記ステータに設
けた透孔に透したロータホルダを介して支持するシャフ
トと、このシャフトを軸受及びこの軸受を支持するメタ
ルホルダを介して回転自在に支承すると共に、前記ステ
ータの外周部分を保持したブラケットからなる回転ヨー
ク型ブラシレスモータにおいて、前記ステータの自由端
である透孔近傍に高密度金属部材を配したことを特徴と
する低ノイズ化した回転ヨーク型ブラシレスモータ。(1) A stator consisting of a thick film fine pattern formed by printing and wiring a plurality of armature coils, a rotor consisting of a magnet with the stator arranged with a gap in between, and a rotating yoke, and this rotor. A shaft supported via a rotor holder passed through a through hole provided in the stator, and a bracket rotatably supporting this shaft via a bearing and a metal holder supporting the bearing, and holding an outer peripheral portion of the stator. 1. A rotary yoke type brushless motor with reduced noise, characterized in that a high-density metal member is arranged near the through hole at the free end of the stator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16895490A JP3046612B2 (en) | 1990-06-27 | 1990-06-27 | Rotary yoke type brushless motor with low noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16895490A JP3046612B2 (en) | 1990-06-27 | 1990-06-27 | Rotary yoke type brushless motor with low noise |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0458752A true JPH0458752A (en) | 1992-02-25 |
| JP3046612B2 JP3046612B2 (en) | 2000-05-29 |
Family
ID=15877633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16895490A Expired - Fee Related JP3046612B2 (en) | 1990-06-27 | 1990-06-27 | Rotary yoke type brushless motor with low noise |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3046612B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9209656B2 (en) | 2012-05-22 | 2015-12-08 | Nidec Corporation | Brushless motor and disk drive apparatus |
| US9318928B2 (en) | 2012-04-03 | 2016-04-19 | Nidec Corporation | Brushless motor, disk drive apparatus and brushless motor manufacturing method |
-
1990
- 1990-06-27 JP JP16895490A patent/JP3046612B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9318928B2 (en) | 2012-04-03 | 2016-04-19 | Nidec Corporation | Brushless motor, disk drive apparatus and brushless motor manufacturing method |
| US9209656B2 (en) | 2012-05-22 | 2015-12-08 | Nidec Corporation | Brushless motor and disk drive apparatus |
| US9667108B2 (en) | 2012-05-22 | 2017-05-30 | Nidec Corporation | Brushless motor and disk drive apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3046612B2 (en) | 2000-05-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |