JPH02131337A - Miniature motor - Google Patents
Miniature motorInfo
- Publication number
- JPH02131337A JPH02131337A JP27800388A JP27800388A JPH02131337A JP H02131337 A JPH02131337 A JP H02131337A JP 27800388 A JP27800388 A JP 27800388A JP 27800388 A JP27800388 A JP 27800388A JP H02131337 A JPH02131337 A JP H02131337A
- Authority
- JP
- Japan
- Prior art keywords
- polymer film
- permanent magnet
- miniature motor
- air gap
- film
- 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.)
- Pending
Links
- 229920006254 polymer film Polymers 0.000 claims abstract description 12
- 229920006267 polyester film Polymers 0.000 abstract description 3
- 239000002253 acid Substances 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000004381 surface treatment Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007747 plating 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
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利川分野
本発明は、例えばカセットテープレコーダーやビデオテ
ープレコーダーなどのテープ駆動源、コンパクトディス
クプレーヤーやビデオディスクプレーヤーなどのディス
ク駆動源、その他カメラや家電機器などの駆動源として
用いられる小型モータに関するものである。Detailed Description of the Invention The present invention is applicable to the industrial field of Icheon, for example, tape drive sources such as cassette tape recorders and video tape recorders, disk drive sources such as compact disk players and video disk players, and other devices such as cameras and home appliances. This invention relates to a small motor used as a drive source.
従来の技術
近年、各機器の小型化によりその駆動源であるモータに
対して軽薄短小かつ高性能化という要望が強《なってき
ている。BACKGROUND OF THE INVENTION In recent years, with the miniaturization of various devices, there has been a growing demand for motors, which are the driving source of the devices, to be lighter, thinner, smaller, and have higher performance.
以下、図面を参照しながら従来の小型モータの一例につ
いて説明する。An example of a conventional small motor will be described below with reference to the drawings.
第２図は従来の小型モータの断面図である。FIG. 2 is a sectional view of a conventional small motor.
図において、１は軸方向に着磁された永久磁石で、ヨー
ク２に固定されフレーム３に嵌合されている。In the figure, reference numeral 1 denotes a permanent magnet magnetized in the axial direction, which is fixed to a yoke 2 and fitted into a frame 3.
４はロー夕で、コイル５，油切りワッシャ６，整流子７
，リング状バリスタ８及びシャフ１・９から構成され、
ヨーク２とフレーム３に設けた両軸受１０にて支えられ
ている。4 is a rotor, coil 5, oil washer 6, commutator 7
, consisting of a ring-shaped varistor 8 and shafts 1 and 9,
It is supported by both bearings 10 provided on the yoke 2 and the frame 3.
以上の様な横成で、永久磁石１として高特性のモータを
得るために、従来から使用されているＳｍＣｏ系永久磁
石に代わるものとして最近では、更に高エネルギー積を
有ずる希土類一Ｆｅ−Ｂ系永久磁石が使用される様にな
ってきた。しかしながら希土類一Ｆｅ−Ｂ系の永久磁石
は組成の大部分がＦｅであるため、非常に錆やすいので
、その表面に耐酸化性皮膜１ａとしてＡＩ蒸着２Ｎｌメ
ッキ，電着塗装などの表面処理が施されている。In order to obtain a motor with high characteristics as the permanent magnet 1 in the above-mentioned horizontal structure, recently, as a substitute for the conventionally used SmCo-based permanent magnet, rare earth-Fe-B, which has an even higher energy product, has been used. Permanent magnets have come into use. However, rare earth-Fe-B permanent magnets are very susceptible to rust because most of their composition is Fe, so surface treatments such as AI vapor deposition, 2Nl plating, electrodeposition coating, etc. are applied to the surface as an oxidation-resistant film 1a. has been done.
発明が解決しようとする課題
しかしながら上記の様な表面処理によって、定の耐酸化
性効果を得るためには、１５μｍ以上の膜厚が必要であ
る。この膜厚は、モータにこの磁石を組み込んだ場合に
エアギャップとして加算され、磁石自体の特性を十分に
活かすことができない。更に上記の表面処理方法では、
コストアップにもつながる。Problems to be Solved by the Invention However, in order to obtain a certain oxidation resistance effect by the above-mentioned surface treatment, a film thickness of 15 μm or more is required. This film thickness is added as an air gap when this magnet is installed in a motor, and the characteristics of the magnet itself cannot be fully utilized. Furthermore, in the above surface treatment method,
This also leads to increased costs.
本発明は上記問題点に鑑み、安くて高性能の小型モータ
を提供するものである。In view of the above-mentioned problems, the present invention provides an inexpensive and high-performance compact motor.
課題を解決するための手段
上記課題を解決するために本発明の小型モータはポリマ
ーフィルムで被覆した希土類一Ｆｅ−Ｂ系永久磁石を用
いたものである。Means for Solving the Problems In order to solve the above problems, the small motor of the present invention uses a rare earth-Fe-B permanent magnet coated with a polymer film.
作用
希土類−Ｆｅ−Ｂ系磁石の耐酸化性を確保するための皮
膜をポリマーフィルムで形成する場合、その皮膜厚が１
〜１０Ｉ．ｔＩｌｌと薄くできるため、モータに永久磁
石を組み込んだ時の永久磁石とコイルとのエアギャップ
を小さくすることができるため、より小型で窩特１１の
モータを得ることができる。Function When forming a film using a polymer film to ensure the oxidation resistance of rare earth-Fe-B magnets, the film thickness is 1
~10I. Since it can be made as thin as tIll, it is possible to reduce the air gap between the permanent magnet and the coil when the permanent magnet is incorporated into the motor, so it is possible to obtain a smaller motor with a diameter of 11.
実施例
以下本発明の実施例について、図面を参照しながら説明
する。EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例における小型モータの断面図
である。FIG. 1 is a sectional view of a small motor according to an embodiment of the present invention.
本実施例は、希土ｉｆ４ − Ｆ ｅ − Ｂ系永久磁
石１の耐酸化性皮膜として膜厚が１〜１０μｍのポリエ
ステルフィルム１ｂを用いたものである。ポリマーフィ
ルムによる被覆の方法としては、袋状にしたポリマーフ
ィルムの中に永久磁石を入れ、真空にひいて密着させた
状態でパックする方法、あるいは、永久磁石の上にポリ
マーフィルムを乗せ、熱で溶着する方法を用いる、なお
、図中の他の構成は、従来例と同じであり同一番号を用
いてその説明を省略する。In this example, a polyester film 1b having a thickness of 1 to 10 μm is used as the oxidation-resistant film of the rare earth if4-Fe-B permanent magnet 1. Coating with polymer film can be done by placing a permanent magnet in a bag-shaped polymer film, vacuuming it and packing it tightly, or placing the polymer film on top of the permanent magnet and heating it. Note that the other configurations in the figure are the same as those of the conventional example, so the same numbers will be used and the description thereof will be omitted.
発明の効果
以上の様に本発明は、表面をポリマーフィルムで被覆し
た希土類−Ｆｅ−Ｂ系永久磁石を用いることにより、被
覆層を薄くでき、エアギャップを小さくすることができ
るので、磁石の特性を有効に利用する事ができ、小型で
高特性のモータを得ることができる。Effects of the Invention As described above, by using a rare earth-Fe-B permanent magnet whose surface is coated with a polymer film, the coating layer can be made thinner and the air gap can be made smaller, which improves the characteristics of the magnet. can be used effectively, and a small motor with high characteristics can be obtained.
第１図は本発明の一実施例における小型モータの断面図
、第２図は従来の小型モータの断面図である。
１・・・・・・永久磁石、１１〕・・・・・・ポリエス
テルフィルム、２・・・・・・ヨーク、３・・・・・・
フレーム、４・・・・・・ロー夕、５・・・・・・コイ
ル、６・・・・・・油切りワッシャ、７・・・・・・整
流子、８・・・・・・リング状バリスタ、９・・・・・
・シャフト、１０・・・・・・軸受。
代理人の氏名 弁理士 粟野重孝 ほか１名（一一一、
一一一一ノFIG. 1 is a sectional view of a small motor according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional small motor. 1...Permanent magnet, 11]...Polyester film, 2...Yoke, 3...
Frame, 4...Lower, 5...Coil, 6...Oil washer, 7...Commutator, 8...Ring Barista, 9...
・Shaft, 10...Bearing. Name of agent: Patent attorney Shigetaka Awano and one other person (111,
1111no
Claims (1)
永久磁石を有する小型モータ。A small motor with a rare earth-Fe-B permanent magnet whose surface is covered with a polymer film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27800388A JPH02131337A (en) | 1988-11-02 | 1988-11-02 | Miniature motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27800388A JPH02131337A (en) | 1988-11-02 | 1988-11-02 | Miniature motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02131337A true JPH02131337A (en) | 1990-05-21 |
Family
ID=17591275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27800388A Pending JPH02131337A (en) | 1988-11-02 | 1988-11-02 | Miniature motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02131337A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0511780U (en) * | 1991-07-18 | 1993-02-12 | 東京パーツ工業株式会社 | Rotating yoke type flat brushless motor |
-
1988
- 1988-11-02 JP JP27800388A patent/JPH02131337A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0511780U (en) * | 1991-07-18 | 1993-02-12 | 東京パーツ工業株式会社 | Rotating yoke type flat brushless motor |
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