JPH0731120A - Rotor structure having synthetic resin molded structure - Google Patents
Rotor structure having synthetic resin molded structureInfo
- Publication number
- JPH0731120A JPH0731120A JP5194292A JP19429293A JPH0731120A JP H0731120 A JPH0731120 A JP H0731120A JP 5194292 A JP5194292 A JP 5194292A JP 19429293 A JP19429293 A JP 19429293A JP H0731120 A JPH0731120 A JP H0731120A
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical magnet
- rotor
- rotary shaft
- synthetic resin
- side plate
- 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
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、回転電機の回転子構造
に関し、特にステッピングモータの回転子構造に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor structure of a rotary electric machine, and more particularly to a rotor structure of a stepping motor.
【０００２】[0002]
【従来の技術】ステッピングモータは、ＯＡ機器、コン
ピュータの周辺機器その他の産業機器などに使用されて
おり、ステッピングモータはいまやこれ等の機器と切っ
ても切れないものとなっている。ステッピングモータ
は、回転子の構造によって、ＰＭ型、ＶＲ型、ＨＢ型に
分類されるが、このうちＰＭ型およびＨＢ型は、回転子
に永久磁石を使用している。2. Description of the Related Art Stepping motors are used in office automation equipment, computer peripheral equipment, and other industrial equipment. Now, stepping motors are inseparable from these equipments. Stepping motors are classified into PM type, VR type, and HB type according to the rotor structure. Among them, PM type and HB type use permanent magnets for the rotor.
【０００３】図３は従来から用いられているステッピン
グモータの回転子の一例を示す断面図である。図３にお
いて、１は回転子本体である。回転子本体１の中央に
は、回転軸２が圧入されている。回転子本体１の外周に
は、リング状の薄型マグネット３が嵌め込まれており、
このリング状で薄型マグネットは回転子本体１に対して
接着剤４により固定されている。薄型マグネット３の表
面には、Ｎ極とＳ極が交互に多数極着磁されている。FIG. 3 is a sectional view showing an example of a rotor of a stepping motor which has been conventionally used. In FIG. 3, reference numeral 1 is a rotor body. A rotary shaft 2 is press-fitted in the center of the rotor body 1. A ring-shaped thin magnet 3 is fitted on the outer periphery of the rotor body 1,
The ring-shaped thin magnet is fixed to the rotor body 1 with an adhesive 4. A large number of N poles and S poles are alternately magnetized on the surface of the thin magnet 3.
【０００４】図４は従来から用いられている別のステッ
ピングモータの回転子の一例を示す断面図である。図４
において、５はリング状の薄型マグネットであり、その
内部は、合成樹脂の射出成型により形成された回転子本
体６で埋められており、その中心には、表面にロレット
７が切られた回転軸８が挿通している。FIG. 4 is a sectional view showing an example of a rotor of another stepping motor which has been conventionally used. Figure 4
5, reference numeral 5 denotes a ring-shaped thin magnet, the inside of which is filled with a rotor body 6 formed by injection molding of synthetic resin, and a rotary shaft having a knurled surface 7 cut at the center thereof. 8 is inserted.
【０００５】[0005]
【発明が解決しようとする課題】上述の如き従来の回転
子は、回転子本体１をアルミニウムの削りだしにより形
成し、欠け易く硬度が高くて加工が困難であるリング状
の薄型マグネット３を回転子本体１の外周に嵌め込み、
これらを接着剤４で固定して薄型マグネット３を強度的
にサポートしているが、回転子本体１を切削加工により
形成しているので、加工に多くの手間を要し、また加工
費が嵩むという問題があった。In the conventional rotor as described above, the rotor main body 1 is formed by shaving aluminum, and the thin ring-shaped magnet 3 that is easily chipped and has high hardness and is difficult to process is rotated. Fitted on the outer circumference of the child body 1,
These are fixed with an adhesive 4 to strongly support the thin magnet 3, but since the rotor body 1 is formed by cutting, a lot of labor is required for processing, and the processing cost is high. There was a problem.
【０００６】図４に示す従来例においては、回転子本体
６が合成樹脂の射出成型品であるため、成型時に収縮が
起こり、薄型マグネット５と回転子本体６との間に隙間
を生じるという欠点がある。In the conventional example shown in FIG. 4, since the rotor body 6 is an injection-molded product of synthetic resin, contraction occurs during molding, and a gap is created between the thin magnet 5 and the rotor body 6. There is.
【０００７】またこれ等２つの従来例では、薄型マグネ
ットの硬度が高く欠け易いため、組立ての際に薄型マグ
ネットの縁が何かに強く接触したような場合、薄型マグ
ネットにクラックなどが生じ、回転子組立体の組立て歩
止まりが低下するという欠点もある。Further, in these two conventional examples, since the hardness of the thin magnet is high and it is easy to chip, when the edge of the thin magnet comes into strong contact with something at the time of assembly, a crack or the like occurs in the thin magnet, and the thin magnet rotates. There is also a drawback that the assembly yield of the child assembly is reduced.
【０００８】本発明は、上述のような従来の欠点を改善
しようとするものであり、その目的は、構造が簡単で、
回転子と結合部と円筒型マグネットが強固に結合し、し
かも組立の際にリング状の薄型マグネットが破損せず、
安価な回転電機の回転子構造を提供することにある。The present invention seeks to remedy the above-mentioned drawbacks of the prior art, and its purpose is to have a simple structure,
The rotor, coupling part and cylindrical magnet are firmly coupled, and the ring-shaped thin magnet is not damaged during assembly,
It is to provide an inexpensive rotor structure for a rotating electric machine.
【０００９】[0009]
【課題を解決するための手段】上記のような本発明の目
的を達成するために、本発明は、円筒型マグネットを回
転軸に固定した回転電機の回転子構造において、両側面
に、外周方向から内周方向に向かって内側に傾斜した溝
とこれに続く段部が形成されている円筒型マグネット
と、中央部には内側に折曲されたリム部が形成され、前
記円筒型マグネットの側面に配置された側板と、円筒型
マグネットの内部に位置し、これと別体の回転軸部分
と、円筒型マグネットと回転軸部分とを結合すると共に
円筒型マグネットの段部を回転軸方向に押圧する力と側
板を円筒型マグネットの側部に押し付ける力を与えてい
る結合部と、を具備してなる合成樹脂モールド構造を有
する回転子構造を提供するものである。In order to achieve the above-mentioned object of the present invention, the present invention provides a rotor structure of a rotary electric machine in which a cylindrical magnet is fixed to a rotary shaft. From the side surface of the cylindrical magnet, a cylindrical magnet in which a groove inclined inward toward the inner circumferential direction and a step portion continuing from the groove are formed, and a rim portion bent inward is formed in the central portion. Located on the inside of the cylindrical magnet, the rotating shaft part which is separate from this side plate, the cylindrical magnet and the rotating shaft part are connected, and the step part of the cylindrical magnet is pressed in the rotating shaft direction. The present invention provides a rotor structure having a synthetic resin mold structure, which includes a connecting portion for applying a force for pressing and a force for pressing a side plate against a side portion of a cylindrical magnet.
【００１０】[0010]
【作用】円筒型マグネットと側板と回転軸部分とを射出
成型用の型内に載置し、結合用の合成樹脂を型内に射出
して結合部を形成し、これにより円筒型マグネットと側
板と回転軸部分とを一体に形成して回転子構造を形成す
る。[Function] The cylindrical magnet, the side plate and the rotary shaft portion are placed in a mold for injection molding, and a synthetic resin for coupling is injected into the mold to form a coupling portion, whereby the cylindrical magnet and the side plate. And a rotary shaft portion are integrally formed to form a rotor structure.
【００１１】[0011]
【実施例】次に本発明の一実施例を、図面を用いて詳細
に説明する。図１は本発明をＰＭ型ステッピングモータ
に適用した一実施例を示す回転子の断面図である。同図
において、１０は円筒型マグネットであり、フェライト
などセラミックス材料から形成されている。円筒型マグ
ネット１０の両側面には、外周方向から内周方向に向か
って内側に傾斜した溝１１、１２とこれに続く段部１
３、１４とが全周に亘って形成されている。１５および
１６は金属板からなる側板であり、中央部には内側に折
曲されたリム部１７および１８が形成されており、それ
らの中央には回転軸が挿通する穴１９、２０が設けられ
ている。An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view of a rotor showing an embodiment in which the present invention is applied to a PM type stepping motor. In the figure, 10 is a cylindrical magnet, which is made of a ceramic material such as ferrite. On both side surfaces of the cylindrical magnet 10, grooves 11 and 12 inclined inward from the outer peripheral direction toward the inner peripheral direction and the step portion 1 following the grooves 11 and 12 are formed.
3 and 14 are formed over the entire circumference. Reference numerals 15 and 16 are side plates made of a metal plate, and inwardly bent rim portions 17 and 18 are formed in the central portion, and holes 19 and 20 through which the rotary shaft is inserted are provided in the central portions thereof. ing.
【００１２】２１は回転軸保持筒であり、アルミニウム
にて形成されておりその表面にはロレットが切られてい
るとともに、中心には後に述べる回転軸が挿通する挿通
口２２が形成されている。２３は回転軸である。該回転
軸２３の直径は挿通口２２の内径よりも少し太く形成さ
れており、該回転軸２３は挿通口２２に押し込まれて回
転軸保持筒２１に強嵌合している。２４は回転軸保持筒
２１を円筒型マグネット１０に接続するための結合部で
ある。該結合部２４は合成樹脂からなり、射出成型法に
より形成される。該結合部２４は、射出成型後の冷却時
にいくらか収縮するが、この収縮作用により、円筒型マ
グネット１０と結合部２４は強固に結合される。Reference numeral 21 denotes a rotary shaft holding cylinder, which is made of aluminum, has a knurled surface, and has a through hole 22 formed at the center thereof through which a rotary shaft to be described later is inserted. Reference numeral 23 is a rotating shaft. The diameter of the rotary shaft 23 is formed to be slightly larger than the inner diameter of the insertion port 22, and the rotary shaft 23 is pushed into the insertion port 22 and tightly fitted to the rotary shaft holding cylinder 21. Reference numeral 24 is a connecting portion for connecting the rotary shaft holding cylinder 21 to the cylindrical magnet 10. The joint portion 24 is made of synthetic resin and is formed by an injection molding method. The joint portion 24 contracts to some extent during cooling after injection molding, but due to this contracting action, the cylindrical magnet 10 and the joint portion 24 are firmly joined.
【００１３】次に、円筒型マグネット１０と結合部２４
とが強固に結合される理由を詳細に説明する。図２は回
転子の一部を破断して示す一部断面図である。円筒型マ
グネット１０の内側に結合部２４となる合成樹脂が射出
され、これが冷却されて固化する際、Ａ点およびＢ点に
対し矢印方向のモールド収縮力が作用し、Ａ点に作用す
る力は円筒型マグネット１０の段部１３、１４をを回転
軸方向すなわち中心方向に締め付ける力となり、Ｂ点に
作用する力は側板１５、１６のリム部１７、１８を互い
に近ずく方向に引っ張り、結果的に側板１５、１６を円
筒型マグネット１０に押し付ける力（矢印Ｄ方向の力）
が作用し、この力は側板１５、１６が円筒型マグネット
１０を保持する力となる。Next, the cylindrical magnet 10 and the connecting portion 24
The reason why and are tightly coupled will be described in detail. FIG. 2 is a partial cross-sectional view showing a part of the rotor by breaking it. When the synthetic resin to be the coupling portion 24 is injected inside the cylindrical magnet 10 and is cooled and solidified, a mold contracting force in the arrow direction acts on the points A and B, and the force acting on the point A is The force that tightens the step portions 13 and 14 of the cylindrical magnet 10 in the rotation axis direction, that is, the center direction, and the force that acts on the point B pulls the rim portions 17 and 18 of the side plates 15 and 16 toward each other, resulting in Force to press the side plates 15 and 16 against the cylindrical magnet 10 (force in the direction of arrow D)
Acts on the side plates 15 and 16 to hold the cylindrical magnet 10.
【００１４】また、Ａ点およびＢ点で矢印方向に作用す
る力はＣ点で結合部２４の一部を側板１５、１６方向に
出張ろうとする力が作用するが、この力は側板１５、１
６により受け止められる。もし側板がない場合には、こ
れを受け止める部分がないため、Ｅ部分の厚みを増さな
ければならない。The force acting in the direction of the arrow at the points A and B acts to travel a part of the connecting portion 24 in the directions of the side plates 15 and 16 at the point C.
Taken by 6. If there is no side plate, there is no part to receive it, so the thickness of the E part must be increased.
【００１５】この実施例では、結合部２４に回転軸保持
筒２１を保持させ、これに回転軸２３を圧入する構造を
採用しているので、射出成型の金型の共通化、回転軸長
さの相違による回転子の種類の低減化が図れる。なお、
回転軸２３と回転軸保持筒２１は別体に形成することな
く一体のものであってもよい。In this embodiment, since the rotary shaft holding cylinder 21 is held by the connecting portion 24 and the rotary shaft 23 is press-fitted into the rotary shaft holding cylinder 21, the injection molding die is made common and the rotary shaft length is made longer. It is possible to reduce the types of rotors due to the difference. In addition,
The rotary shaft 23 and the rotary shaft holding cylinder 21 may be integrated without being formed separately.
【００１６】これまでに説明した本発明の実施例におけ
る側板は接地部分を持たない。このため回転時の空気と
の摩擦などの原因でリム部に高電圧の静電気が帯電する
ことがある。このような不都合を除去するため、本発明
では、回転子の結合部２４をカーボンあるいは金属の微
粉末を混入した導電性合成樹脂により構成することがで
きる。また、本発明の回転子はステッピングモータに適
用できるだけでなく、同期電動機、同期発電機など、マ
グネットを回転子に用いる回転電機にも適用できること
はいうまでもない。The side plate in the embodiments of the present invention described so far has no grounding portion. Therefore, high voltage static electricity may be charged on the rim portion due to friction with air during rotation. In order to eliminate such inconvenience, in the present invention, the coupling portion 24 of the rotor can be made of conductive synthetic resin mixed with carbon or metal fine powder. Further, it goes without saying that the rotor of the present invention can be applied not only to stepping motors, but also to rotary electric machines using magnets for rotors, such as synchronous motors and synchronous generators.
【００１７】[0017]
【発明の効果】以上詳細に説明したように、本発明は、
円筒型マグネットを回転軸に固定した回転電機の回転子
構造において、両側面に、外周方向から内周方向に向か
って内側に傾斜した溝とこれに続く段部が形成されてい
る円筒型マグネットと、中央部には内側に折曲されたリ
ム部が形成され、前記円筒型マグネットの側面に配置さ
れた側板と、円筒型マグネットの内部に位置し、これと
別体の回転軸部分と、円筒型マグネットと回転軸部分と
を結合すると共に円筒型マグネットの段部を回転軸方向
に押圧する力と側板を円筒型マグネットの側部に押し付
ける力を与えている結合部と、を具備しているので、脆
くて固いセラミックス製の円筒型マグネットの側部は側
板で保護され、組立の際に円筒型マグネットが破損する
ようなことはない。また、結合部は円筒型マグネットの
段部を回転軸方向に押圧する力と側板を円筒型マグネッ
トの側部に押し付ける力を付与しているので、円筒型マ
グネットと側板と回転軸部分を相互に強固に結合してお
り、従来のように接着剤によりこれ等を結合するような
ことはなく、構造が簡単でしかも安価な回転子を提供す
ることができる。As described in detail above, the present invention is
In a rotor structure of a rotary electric machine in which a cylindrical magnet is fixed to a rotating shaft, a cylindrical magnet having grooves on both sides which are inwardly inclined from an outer peripheral direction toward an inner peripheral direction and a step portion following the groove are formed. A rim portion bent inward is formed in the central portion, a side plate disposed on a side surface of the cylindrical magnet, a rotary shaft portion that is located inside the cylindrical magnet, and is separate from the side plate, and a cylinder. And a coupling portion for coupling the die magnet and the rotating shaft portion, and applying a force for pressing the step portion of the cylindrical magnet in the rotating axis direction and a force for pushing the side plate to the side portion of the cylindrical magnet. Therefore, the side portion of the brittle and hard ceramic cylindrical magnet is protected by the side plate, and the cylindrical magnet is not damaged during assembly. In addition, since the connecting portion gives a force for pressing the stepped portion of the cylindrical magnet in the rotation axis direction and a force for pushing the side plate against the side portion of the cylindrical magnet, the cylindrical magnet, the side plate, and the rotating shaft portion are mutually The rotors are firmly bonded and are not bonded to each other with an adhesive as in the conventional case, and a rotor having a simple structure and inexpensive can be provided.
【図１】本発明の一実施例を示す断面図FIG. 1 is a sectional view showing an embodiment of the present invention.
【図２】回転子の一部断面図FIG. 2 is a partial cross-sectional view of a rotor
【図３】従来の回転子の断面図FIG. 3 is a cross-sectional view of a conventional rotor
【図４】従来の他の回転子の断面図FIG. 4 is a sectional view of another conventional rotor.
１・・・・・回転子本体 ２・・・・・回転軸 ３・・・・・薄型マグネット ４・・・・・接着剤 ５・・・・・薄型マグネット ６・・・・・回転子本体 ７・・・・・ロレット ８・・・・・回転軸 １０・・・・・円筒型マグネット １１・・・・・溝 １２・・・・・溝 １３・・・・・段部 １４・・・・・段部 １５・・・・・側板 １６・・・・・側板 １７・・・・・リム部 １８・・・・・リム部 １９・・・・・穴 ２０・・・・・穴 ２１・・・・・回転子保持筒 ２２・・・・・挿通口 ２３・・・・・回転軸 ２４・・・・・結合部 1 ... Rotor body 2 ... Rotating shaft 3 ... Thin magnet 4 ... Adhesive 5 ... Thin magnet 6 ... Rotor body 7 ... Rollette 8 ... Rotating shaft 10 ... Cylindrical magnet 11 ... Groove 12 ... Groove 13 ... Step 14 ... ..Steps 15 ... Side plates 16 ... Side plates 17 ... Rim portions 18 ... Rim portions 19 ... Hole 20 ... Hole 21 .... Rotor holding cylinder 22 ... Insertion port 23 ... Rotating shaft 24 ... Coupling part
Claims (3)
電機の回転子構造において、 両側面に、外周方向から内周方向に向かって内側に傾斜
した溝とこれに続く段部が形成されている円筒型マグネ
ットと、 中央部には内側に折曲されたリム部が形成され、前記円
筒型マグネットの側面に配置された側板と、 円筒型マグネットの内部に位置し、これと別体の回転軸
部分と、 円筒型マグネットと回転軸部分とを結合すると共に円筒
型マグネットの段部を回転軸方向に押圧する力と側板を
円筒型マグネットの側部に押し付ける力を与えている結
合部と、 を具備してなる合成樹脂モールド構造を有する回転子構
造。1. A rotor structure of a rotary electric machine having a cylindrical magnet fixed to a rotary shaft, wherein grooves are formed on both side surfaces of the rotor, the grooves being inclined inward from the outer peripheral direction toward the inner peripheral direction, and a step portion continuing from the groove. A cylindrical magnet, a rim part that is bent inward is formed in the center, a side plate that is arranged on the side surface of the cylindrical magnet, and a side plate that is located inside the cylindrical magnet A shaft portion, a coupling portion that couples the cylindrical magnet and the rotating shaft portion together with a force that presses the step portion of the cylindrical magnet in the rotating shaft direction and a force that presses the side plate against the side portion of the cylindrical magnet, A rotor structure having a synthetic resin mold structure comprising:
れた回転軸からなることを特徴とする請求項１記載の合
成樹脂モールド構造を有する回転子構造。2. The rotor structure having a synthetic resin mold structure according to claim 1, wherein the rotary shaft portion comprises a rotary shaft holding cylinder and a rotary shaft inserted through the rotary shaft holding cylinder.
れていることを特徴とする請求項１記載の合成樹脂モー
ルド構造を有する回転子構造。3. The rotor structure having a synthetic resin mold structure according to claim 1, wherein the coupling portion is made of a conductive synthetic resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5194292A JP2992730B2 (en) | 1993-07-09 | 1993-07-09 | Rotor structure of rotating electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5194292A JP2992730B2 (en) | 1993-07-09 | 1993-07-09 | Rotor structure of rotating electric machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0731120A true JPH0731120A (en) | 1995-01-31 |
| JP2992730B2 JP2992730B2 (en) | 1999-12-20 |
Family
ID=16322172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5194292A Expired - Fee Related JP2992730B2 (en) | 1993-07-09 | 1993-07-09 | Rotor structure of rotating electric machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2992730B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5806169A (en) * | 1995-04-03 | 1998-09-15 | Trago; Bradley A. | Method of fabricating an injected molded motor assembly |
| KR100301517B1 (en) * | 1999-07-23 | 2001-11-01 | 구자홍 | Rotor for brushless d.c motor |
| KR20020046427A (en) * | 2000-12-14 | 2002-06-21 | 이충전 | Rotor assembly |
| JP2003061279A (en) * | 2001-08-08 | 2003-02-28 | Matsushita Electric Ind Co Ltd | Rotor for motor |
| EP1796252A1 (en) * | 2004-08-31 | 2007-06-13 | Nippon Seiki Co., Ltd. | Magnet rotor, movable magnet-type instrument with the magnet rotor, and stepping motor with the magnet rotor |
| CN106487137A (en) * | 2015-08-26 | 2017-03-08 | 日立金属株式会社 | Surface magnet revolving part |
| JP2017147920A (en) * | 2015-08-26 | 2017-08-24 | 日立金属株式会社 | Surface magnet rotator |
| JPWO2022054149A1 (en) * | 2020-09-09 | 2022-03-17 |
-
1993
- 1993-07-09 JP JP5194292A patent/JP2992730B2/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5806169A (en) * | 1995-04-03 | 1998-09-15 | Trago; Bradley A. | Method of fabricating an injected molded motor assembly |
| US6020661A (en) * | 1995-04-03 | 2000-02-01 | Pacific Scientific Company | Injection molded motor assembly |
| KR100301517B1 (en) * | 1999-07-23 | 2001-11-01 | 구자홍 | Rotor for brushless d.c motor |
| KR20020046427A (en) * | 2000-12-14 | 2002-06-21 | 이충전 | Rotor assembly |
| JP2003061279A (en) * | 2001-08-08 | 2003-02-28 | Matsushita Electric Ind Co Ltd | Rotor for motor |
| EP1796252A1 (en) * | 2004-08-31 | 2007-06-13 | Nippon Seiki Co., Ltd. | Magnet rotor, movable magnet-type instrument with the magnet rotor, and stepping motor with the magnet rotor |
| EP1796252A4 (en) * | 2004-08-31 | 2012-12-26 | Nippon Seiki Co Ltd | Magnet rotor, movable magnet-type instrument with the magnet rotor, and stepping motor with the magnet rotor |
| CN106487137A (en) * | 2015-08-26 | 2017-03-08 | 日立金属株式会社 | Surface magnet revolving part |
| JP2017147920A (en) * | 2015-08-26 | 2017-08-24 | 日立金属株式会社 | Surface magnet rotator |
| CN106487137B (en) * | 2015-08-26 | 2020-02-14 | 日立金属株式会社 | Surface magnet type rotary member |
| JPWO2022054149A1 (en) * | 2020-09-09 | 2022-03-17 | ||
| WO2022054149A1 (en) * | 2020-09-09 | 2022-03-17 | 三菱電機株式会社 | Rotor, electric motor, blower, and air conditioning device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2992730B2 (en) | 1999-12-20 |
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