JP3127977B2 - Thin motor - Google Patents
Thin motorInfo
- Publication number
- JP3127977B2 JP3127977B2 JP06214286A JP21428694A JP3127977B2 JP 3127977 B2 JP3127977 B2 JP 3127977B2 JP 06214286 A JP06214286 A JP 06214286A JP 21428694 A JP21428694 A JP 21428694A JP 3127977 B2 JP3127977 B2 JP 3127977B2
- Authority
- JP
- Japan
- Prior art keywords
- teeth
- magnetic
- rotational position
- armature
- thin motor
- 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 - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、薄型電動機に係り、特
にディスク状記録媒体の回転駆動に好適なブラシレスモ
ータの如くの薄型電動機に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin motor, and more particularly to a thin motor such as a brushless motor suitable for driving a disk-shaped recording medium.
【０００２】[0002]
【従来の技術】近年、コンピュータの外部記憶装置とし
て情報を記録再生するための手段としてフロッピーディ
スク及びハードディスクなどのディスク状記録媒体が多
く用いられていることは周知のことである。2. Description of the Related Art In recent years, it is well known that disk-shaped recording media such as floppy disks and hard disks are often used as means for recording and reproducing information as an external storage device of a computer.
【０００３】そして、この種のディスク状記録媒体に記
録される情報は多用化され、その情報量は益々多くなっ
てきているのが現状である。それに伴って、ディスク状
記録媒体に課せられる技術的課題も大容量、高密度とな
っていることから、駆動部である電動機の回転精度も当
然高精度であることが要求されている。そのために、構
成部品の組立て精度を高めたり、ディスク状記録媒体の
振れに大きく起因する回転主部であるベアリングの等級
を高めたり、例えば特開平１−１５２９４７号公報に示
されるようにモータの磁極形状を各種工夫して対応して
いるのが現状である。At present, information recorded on such a disk-shaped recording medium is becoming more versatile and the amount of information is increasing. Along with this, the technical problems imposed on the disk-shaped recording medium have also become large-capacity and high-density. Therefore, it is naturally required that the rotation accuracy of the electric motor, which is the drive unit, be also high in accuracy. For this purpose, the assembling accuracy of the components is increased, the grade of the bearing, which is the main rotating part, which is largely caused by the deflection of the disk-shaped recording medium, is increased. It is the present situation that various shapes are devised.
【０００４】図７は薄型電動機である３．５インチフロ
ッピーディスク駆動用の従来のブラシレスモータの断面
図であり、電機子の歯を変形させたものである。即ち、
薄型電動機は図に示すように中央に回転軸３を固定し、
内周面にマグネット１を備え、かつ上部に３．５インチ
フロッピーディスクを載置するロータヨーク２から構成
されているロータ６と、回転軸３を支持すべくベース９
上に固定された焼結含油軸受からなる軸受８と、電機子
の歯４に巻線５を巻回してベース９上に固定されたステ
ータとなる固定電機子７とから構成され、上記巻線５へ
の通電を切替えることによりロータ６が回転駆動され
る。FIG. 7 is a sectional view of a conventional brushless motor for driving a 3.5-inch floppy disk, which is a thin motor, in which teeth of an armature are deformed. That is,
For the thin motor, the rotating shaft 3 is fixed at the center as shown in the figure,
A rotor 6 comprising a magnet 1 on the inner peripheral surface and a rotor yoke 2 on which a 3.5-inch floppy disk is mounted, and a base 9 for supporting the rotating shaft 3
Bearing 8 comprising a sintered oil-impregnated bearing fixed thereon, and an armature
And a fixed armature 7 serving as a stator, which is fixed on a base 9 by winding a winding 5 around the teeth 4. The rotor 6 is rotationally driven by switching the energization to the winding 5.
【０００５】上記軸受８は焼結含油合金を用いているた
めに回転軸３と軸受との間には所定のクリアランスが必
要であるが、このクリアランスがロータ６の機械的なア
ンバランスによってロータ６が回転軸３とともに傾いて
すりこぎ運動を起こしてしまう。Since the bearing 8 is made of a sintered oil-impregnated alloy, a predetermined clearance is required between the rotating shaft 3 and the bearing. Tilts together with the rotating shaft 3 to cause a rubbing motion.
【０００６】また、コイル電流の切替えによりロータ６
が回転する際、歯４とマグネット１の磁極との吸引バラ
ンスの変化、及び回転軸３の上記したクリアランスと相
俟ってディスクに面振れが発生する。このため、ディス
クにトラックずれが生じリード／ライトエラーの原因と
なり高密度記録が困難となる。The switching of the coil current causes the rotor 6
When the disk rotates, a change in the attraction balance between the teeth 4 and the magnetic poles of the magnet 1 and the above-described clearance of the rotating shaft 3 cause the disk to run out. For this reason, a track shift occurs on the disk, which causes a read / write error, making it difficult to perform high-density recording.
【０００７】[0007]
【発明が解決しようとする課題】従って従来は上記課題
のために、図８に併せて示す如く複数の歯のうち回転位
置検出用磁気センサ１０1 と隣接する歯を含む所定の歯
４1 〜４3 のみを９０度下に、またそれそらと軸対称位
置にあるものを上に９０度屈曲させて積極的に磁気的ア
ンバランス部を設け、ロータ６が特定のステータ位置で
常に吸引されるようにして、回転軸３にクリアランスが
あってもその回転における偏芯を防止する構造が考えら
れていた。[SUMMARY OF THE INVENTION Therefore for the conventional problems described above, the predetermined tooth 4 1 comprising teeth adjacent to the magnetic sensor 10 1 for rotation position detection of the plurality of teeth, as also shown in FIG. 8 4 3 only under 90 degrees, provided actively magnetically unbalanced portion is bent 90 degrees above what it empty and axisymmetric position, the rotor 6 is always sucked in particular stator position Thus, a structure has been considered that prevents eccentricity in rotation of the rotating shaft 3 even if the rotating shaft 3 has a clearance.
【０００８】上記構造によると、図７に示すようにマグ
ネット１のベース９側への吸引によりＦ1 ，Ｆ2 なる力
が作用するが、下側に屈曲した歯４1 に作用する力Ｆ2
の方がＦ1 より大となり、回転軸３は常に歯４1 側に傾
いて回転することで上記課題の解決を図っている。[0008] According to the above structure, F 1, F 2 becomes the force by suction to the base 9 side of the magnet 1, as shown in FIG. 7 is applied, the force F 2 acting on the teeth 4 1 bent to the lower side
Large next than F 1 is toward the rotation shaft 3 is always aimed at solving the above problems by rotating inclined teeth 4 1 side.
【０００９】しかしながら、回転位置検出用磁気センサ
１０1 は９０度屈曲された歯４1 ，４2 間に配置されて
いることから、回転位置検出用磁気センサ１０1 はこれ
に極端に接近した歯４1 ，４2 による磁束の影響をうけ
てしまって、その出力は図９（Ａ）に示すようにコイル
電流が重畳してモータ駆動波形が歪むため、振動や騒音
が発生し、その結果としてディスクの面振れ、軸振れ等
によってディスク駆動用には良好な効果を発揮するに至
らなかった。However, since the rotational position detecting magnetic sensor 10 1 is disposed between the teeth 4 1 and 4 2 bent at 90 degrees, the rotational position detecting magnetic sensor 10 1 is located at the extremely close position. 4 1, 4 2 I under the influence of magnetic flux due, therefore output is distorted motor driving waveform coil current is superimposed as shown in FIG. 9 (a), vibration and noise are generated, as a result Due to disk runout, shaft runout, etc., no satisfactory effect was obtained for disk drive.
【００１０】[0010]
【課題を解決するための手段】本発明は上記課題に鑑み
てなされたものであり、磁性体からなるベース上に、放
射状に形成された複数の歯を備えた固定電機子の前記歯
間に回転位置検出用磁気センサが配置され、ディスク状
記録媒体を保持し、前記固定電機子と所定の間隔を介し
て対向配置されたマグネットを備えて回転駆動されるロ
ータを有する薄型電動機において、少なくとも前記回転
位置検出用磁気センサと隣接する特定の電機子の歯を除
いた他の歯の少なくとも１つを軸方向に変位させてなる
薄型電動機。SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has been made in consideration of the above problems, and has a fixed armature having a plurality of teeth formed radially on a base made of a magnetic material. A magnetic motor for detecting a rotational position is provided, which holds a disk-shaped recording medium, and a thin motor having a rotor rotatably driven with a magnet arranged opposite to the fixed armature with a predetermined space therebetween, at least A thin motor in which at least one of teeth other than a specific armature tooth adjacent to a rotational position detecting magnetic sensor is displaced in an axial direction.
【００１１】及び磁性体からなるベース上に、積層磁性
板を放射状に形成した複数の歯を備えた固定電機子の前
記歯間に３個の回転位置検出用磁気センサが連続して配
置され、ディスク状記録媒体を保持し、前記固定電機子
と所定の間隔を介して対向配置されたマグネットを備え
て回転駆動されるロータを有する薄型電動機において、
前記３個の回転位置検出用磁気センサと隣接する前記積
層磁性板の歯の先端部を前記ベース側とは反対側に変位
させてなる薄型電動機を提供する。And three magnetic sensors for detecting a rotational position are continuously arranged between the teeth of a fixed armature having a plurality of teeth formed by radially forming a laminated magnetic plate on a base made of a magnetic material; A thin motor that holds a disk-shaped recording medium and has a rotor that is rotationally driven with a magnet that is opposed to the fixed armature with a predetermined space therebetween,
Provided is a thin motor in which tip ends of teeth of the laminated magnetic plate adjacent to the three rotation position detecting magnetic sensors are displaced to a side opposite to the base side.
【００１２】[0012]
【実施例】以下に本発明に係る薄型電動機の一実施例を
図１乃至図６を参照して詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a thin motor according to the present invention will be described below in detail with reference to FIGS.
【００１３】図１に示すように薄型電動機は、プレス成
形等により椀型に形成されており、回転軸１３を固定し
た中央部にディスク載置部１２ｂを有し、外周部の内面
にマグネット１１を固定したロータヨーク１２とからな
るロータ１６と、回転軸１３を支持すべく磁性体からな
るベース１９上に固定された焼結含油合金からなる軸受
１８を備え、上記マグネット１１と対向し、巻線（コイ
ル）１５が巻回された電機子１４を軸受１８のフランジ
部１８ｂに固定したステータ１７とから構成されてい
る。上記ディスク載置部１２ｂは図示せぬディスクの金
属製ハブのチャツキング孔と嵌合する駆動ピン１２ａ及
び金属製ハブを吸着固定する固定用マグネット１２ｃを
有するものである。As shown in FIG. 1, the thin electric motor is formed in a bowl shape by press molding or the like, has a disk mounting portion 12b at a central portion to which a rotating shaft 13 is fixed, and has a magnet 11 on an inner surface of an outer peripheral portion. a rotor 16 consisting of a fixed rotor yoke 12. and includes a bearing 18 formed of oil-impregnated sintered alloy, which is fixed on a base 19 made of a magnetic material so as to support the rotating shaft 13, opposite to the magnet 11, the winding And a stator 17 in which the armature 14 around which the (coil) 15 is wound is fixed to the flange portion 18 b of the bearing 18. The disk mounting portion 12b has a drive pin 12a fitted into a chucking hole of a metal hub of a disk (not shown) and a fixing magnet 12c for attracting and fixing the metal hub.
【００１４】上記焼結含油合金からなる軸受１８は、回
転軸１３を支持する円筒部１８ａと下部の円盤状のフラ
ンジ部１８ｂとからなり、このフランジ部１８ｂには電
機子１４及びベース１９に対する複数の位置決め用突起
１８ｃが形成されると共に、ベース１９及び電機子１４
に対する複数の固定用突起１８ｄがそれぞれ一体形成さ
れている。このように軸受１８と各突起部を一体形成す
ることにより、従来採用されている位置決め部品及び固
定用ピンを省略できると同時に、電機子１４に対する回
転位置検出用磁気センサの取付け精度も飛躍的に向上す
るものとなる。固定用突起１８ｄはベース１９及び電機
子１４に先端をカシメることにより固定される。なお、
２２はスラスト軸受である。The bearing 18 made of the sintered oil-impregnated alloy comprises a cylindrical portion 18a for supporting the rotating shaft 13 and a lower disk-shaped flange portion 18b. Are formed, and the base 19 and the armature 14 are formed.
Are formed integrally with each other. By integrally forming the bearing 18 and the respective projections in this manner, the positioning components and fixing pins conventionally used can be omitted, and the mounting accuracy of the rotational position detecting magnetic sensor with respect to the armature 14 is dramatically improved. It will improve. The fixing projection 18d is fixed to the base 19 and the armature 14 by caulking the tip. In addition,
22 is a thrust bearing.
【００１５】また、電機子１４は図２に示す如く、複数
の磁性板を積層し放射状に形成して複数個の歯（実施例
では１５個）を備えてなり、複数個の歯のうち隣接する
歯１４ａ，１４ｂ，１４ｃの最外周部分（巻線部分より
突出する部分）は、図５に示す如くベース１９側に寸法
Ｌだけ屈曲変位させてある。As shown in FIG. 2, the armature 14 is formed by laminating a plurality of magnetic plates and forming them radially to have a plurality of teeth (15 in the embodiment). The outermost peripheral portions (protruding portions from the winding portions) of the teeth 14a, 14b and 14c are bent and displaced by a dimension L toward the base 19 as shown in FIG.
【００１６】歯１４ａ〜１４ｃの曲げ量は、歯の厚さを
Ｄとし、その変位量をＬとした時、０．１＜Ｌ／Ｄ＜２
なる関係としてある。本実施例ではＬ／Ｄ＝０．４とし
てある。The bending amount of the teeth 14a to 14c is 0.1 <L / D <2, where D is the thickness of the teeth and L is the displacement thereof.
There is a relationship. In this embodiment, L / D is set to 0.4.
【００１７】そして、ロータの位置を検出するよう等配
された回転位置検出用磁気センサ２１1 ，２１2 ，２１
3 は屈曲変位された歯１４ａ，１４ｂ，１４ｃとは隣接
しないよう他の歯間にてベース１９上に取付けられてい
る。このように構成された電動機は図１に示すように歯
１４ａ（１４ｂ，１４ｃ）側にはマグネット１１の大な
る吸引力Ｆ2 が作用し、その軸受部は図４に拡大して示
すように回転軸１３と軸受１８とのクリアランス２０が
あってもロータは常に一定の傾斜位置で回転し続け、す
りこぎ運動を発生するようなことはない。The rotational position detecting magnetic sensors 21 1 , 21 2 , 21 are arranged equally to detect the position of the rotor.
3 is mounted on the base 19 between other teeth so as not to be adjacent to the bent teeth 14a, 14b, 14c. Thus configured motor acts attraction force F 2 a large consisting of the magnet 11 to the teeth 14a (14b, 14c) side as shown in FIG. 1, the bearing portion in an enlarged manner 4 Even if there is a clearance 20 between the rotating shaft 13 and the bearing 18, the rotor always keeps rotating at a constant inclined position, and no scouring motion occurs.
【００１８】従って、電機子のコイルに通電しコイル電
流の切替えにより磁界が発生してロータ１６が回転する
際、上記した如く回転位置検出用磁気センサ２１と屈曲
変位された歯１４ａ，１４ｂ，１４ｃとの位置関係によ
り、回転位置検出用磁気センサ２１の出力波形は図９
（Ｂ）のように正弦波状になり従来問題となっていたコ
イル電流の歪による振動等の発生を抑制すると同時にす
りこぎ運動をも回避し得る。さらに、ディスクの振動や
面振れが少なく記録／再生時のリード／ライトエラーが
改善され、高密度記録が可能となる。Therefore, when the rotor 16 is rotated by energizing the coil of the armature and switching the coil current to generate a magnetic field, as described above, the rotational position detecting magnetic sensor 21 and the bent teeth 14a, 14b, 14c are displaced. 9, the output waveform of the rotational position detecting magnetic sensor 21 is shown in FIG.
As shown in FIG. 3B, it is possible to suppress the occurrence of vibration and the like due to the distortion of the coil current, which has become a sine wave shape, which has been a problem in the past, and also to avoid the rubbing motion. Furthermore, read / write errors at the time of recording / reproduction are improved with less vibration and surface deflection of the disk, and high-density recording becomes possible.
【００１９】そして、歯１４ａ〜１４ｃの変位量を０．
１＜Ｌ／Ｄ＜２とすることにより、図６に示すようにロ
ータの振れ量を小とすることができる。The displacement of the teeth 14a to 14c is set to 0.
By setting 1 <L / D <2, the runout amount of the rotor can be reduced as shown in FIG.
【００２０】図３は本発明の他の実施例を示す電機子の
平面図であり、回転位置検出用磁気センサ２１1 ，２１
2 ，２１3 が片側に集中配置されたものであり、各回転
位置検出用磁気センサ２１1 ，２１2 ，２１3 と隣接す
る歯１４ａ〜１４ｄは反ステータ側（マグネット１１の
吸引力の方向と反対の上側）に変位させてある。その変
位量は上記した条件と同様である。このように構成する
ことによっても回転位置検出用磁気センサの出力による
コイル電流の影響を少なくすることができ、上記実施例
と同様の効果を奏し得る。FIG. 3 is a plan view of an armature showing another embodiment of the present invention, and shows magnetic sensors 21 1 and 21 for detecting rotational positions.
2 and 21 3 are concentratedly arranged on one side, and the teeth 14a to 14d adjacent to the respective rotational position detecting magnetic sensors 21 1 , 21 2 and 21 3 are arranged on the opposite side of the stator (to the direction of the attraction force of the magnet 11 and (Upper side opposite). The amount of displacement is the same as the condition described above. With such a configuration, the influence of the coil current due to the output of the rotational position detecting magnetic sensor can be reduced, and the same effect as in the above embodiment can be obtained.
【００２１】なお、上記の場合、各回転位置検出用磁気
センサ２１1 ，２１2 ，２１3 の回転軸１３に対して軸
対称位置にある歯１４ｊを中心として１つ以上をベース
１９側に変位させても良い。In the above case, one or more of the magnetic sensors 21 1 , 21 2 , and 21 3 are displaced toward the base 19 around the teeth 14 j that are axially symmetric with respect to the rotation shaft 13 of each of the rotation sensors 13 1 , 21 2 , and 21 3. You may let it.
【００２２】上記実施例における歯の屈曲変位に関して
は、ロータの重量及び形状により曲げる数を増減させて
も同様の効果が得られることは勿論である。Regarding the bending displacement of the teeth in the above-described embodiment, it goes without saying that the same effect can be obtained even if the number of bendings is increased or decreased depending on the weight and shape of the rotor.
【００２３】[0023]
【発明の効果】以上詳述した本発明に係る薄型電動機に
よると、請求項１，２，３にあっては回転位置検出用磁
気センサの出力にコイル電流の影響による振動等の発生
を抑制すると同時にすりこぎ運動をも回避し得、またデ
ィスクの振動や面振れが少なく記録／再生時のリード／
ライトエラーが改善され、高密度記録が可能となる。請
求項４にあっては回転位置検出用磁気センサの位置が任
意に設定でき、請求項５にあってはロータのステータに
対する吸引力を大きくしてすりこぎ運動をより抑制し得
る効果がある。According to the thin motor according to the present invention described in detail above, according to the first, second and third aspects, it is possible to suppress the occurrence of vibrations and the like due to the influence of the coil current on the output of the magnetic sensor for detecting the rotational position. At the same time, rubbing motion can be avoided, and disk vibration and surface runout are small and read / write during recording / reproducing.
Write errors are improved, and high-density recording becomes possible. According to the fourth aspect, the position of the magnetic sensor for detecting the rotational position can be set arbitrarily, and the fifth aspect has the effect of increasing the attraction force of the rotor to the stator to further suppress the rubbing motion.
【図１】本発明の薄型電動機の一実施例を示す断面図で
ある。FIG. 1 is a sectional view showing one embodiment of a thin motor of the present invention.
【図２】本発明の薄型電動機の電機子と回転位置検出用
磁気センサとの関係を示す平面図である。FIG. 2 is a plan view showing a relationship between an armature of the thin motor of the present invention and a magnetic sensor for detecting a rotational position.
【図３】本発明の薄型電動機の他の実施例の電機子と回
転位置検出用磁気センサとの関係を示す平面図である。FIG. 3 is a plan view showing a relationship between an armature and a rotational position detecting magnetic sensor according to another embodiment of the thin motor of the present invention.
【図４】回転軸と軸受部とのクリアランスの状態を示す
部分拡大断面図である。 FIG. 4 shows a state of clearance between a rotating shaft and a bearing portion.
It is a partial expanded sectional view.
【図５】本発明の薄型電動機の歯の屈曲変位状態を示す
半断面図である。 FIG. 5 shows the bending displacement state of the teeth of the thin motor of the present invention .
It is a half sectional view.
【図６】本発明の薄型電動機の歯の変位量と振れとの関
係を示す図である。FIG. 6 is a diagram showing the relationship between the amount of tooth displacement and runout of the thin motor of the present invention.
【図７】従来の電動機の断面図である。FIG. 7 is a sectional view of a conventional electric motor.
【図８】従来の電動機の電機子と回転位置検出用磁気セ
ンサとの関係を示す平面図である。FIG. 8 is a plan view showing a relationship between an armature of a conventional electric motor and a magnetic sensor for detecting a rotational position.
【図９】従来及び本発明の薄型電動機の回転位置検出用
磁気センサの出力波形である。FIG. 9 shows output waveforms of a magnetic sensor for detecting a rotational position of a thin motor according to the related art and the present invention.
１１…マグネット、１２…ロータヨーク、１３…回転
軸、１４…歯、１５…巻線（コイル）、１６…ロータ、
１７…ステータ、２１1 ，２１2 ，２１3 …回転位置検
出用磁気センサ。11 ... magnet, 12 ... rotor yoke, 13 ... rotating shaft, 14 ... teeth, 15 ... winding (coil), 16 ... rotor,
17 ... stator, 21 1 , 21 2 , 21 3 ... magnetic sensors for detecting rotational position.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 平５−48576（ＪＰ，Ｕ) 実開 昭61−114976（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H02K 29/00 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-48576 (JP, U) JP-A-61-114976 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) H02K 29/00
Claims (5)
された複数の歯を備えた固定電機子の前記歯間に回転位
置検出用磁気センサが配置され、ディスク状記録媒体を
保持し、前記固定電機子と所定の間隔を介して対向配置
されたマグネットを備えて回転駆動されるロータを有す
る薄型電動機において、少なくとも前記回転位置検出用
磁気センサと隣接する特定の電機子の歯を除いた他の歯
の少なくとも１つを軸方向に変位させてなる薄型電動
機。A magnetic sensor for detecting a rotational position is arranged between said teeth of a fixed armature having a plurality of radially formed teeth on a base made of a magnetic material, and holds a disk-shaped recording medium. In a thin motor having a rotor rotatably driven with a magnet opposed to the fixed armature with a predetermined distance therebetween, at least teeth of a specific armature adjacent to the rotation position detecting magnetic sensor are removed. A thin motor in which at least one of the other teeth is displaced in the axial direction.
気センサと隣接しない前記歯を前記ベース側に変位させ
てなる薄型電動機。2. A thin motor according to claim 1, wherein said teeth not adjacent to said rotational position detecting magnetic sensor are displaced toward said base.
放射状に形成した複数の歯を備えた固定電機子の前記歯
間に３個の回転位置検出用磁気センサが連続して配置さ
れ、ディスク状記録媒体を保持し、前記固定電機子と所
定の間隔を介して対向配置されたマグネットを備えて回
転駆動されるロータを有する薄型電動機において、 前記３個の回転位置検出用磁気センサと隣接する前記積
層磁性板の歯の先端部を前記ベース側とは反対側に変位
させてなる薄型電動機。3. A magnetic armature for detecting a rotational position is continuously arranged between said teeth of a fixed armature having a plurality of teeth formed by radially forming laminated magnetic plates on a base made of a magnetic material. A thin motor having a rotor that holds a disk-shaped recording medium and is rotatably driven with a magnet disposed opposite to the fixed armature with a predetermined space therebetween, wherein the three rotational position detecting magnetic sensors are A thin motor in which tips of teeth of adjacent laminated magnetic plates are displaced to a side opposite to the base side.
記歯の厚さをＤとし、その変位量をＬとした時、 ０．１＜Ｌ／Ｄ＜２なる関係を満たしてなる薄型電動
機。4. The thin type according to claim 1, wherein when the thickness of the teeth is D and the displacement is L, the relationship of 0.1 <L / D <2 is satisfied. Electric motor.
出用磁気センサと隣接する前記積層磁性板の歯と軸対称
の位置にある前記積層磁性板の歯の内、少なくも１つの
歯を前記ベース側に変位させてなる薄型電動機。5. The laminated magnetic plate according to claim 3, wherein at least one of the teeth of the laminated magnetic plate at positions axially symmetric with the teeth of the laminated magnetic plate adjacent to the three rotational position detecting magnetic sensors. Is displaced toward the base side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06214286A JP3127977B2 (en) | 1994-08-16 | 1994-08-16 | Thin motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06214286A JP3127977B2 (en) | 1994-08-16 | 1994-08-16 | Thin motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0865985A JPH0865985A (en) | 1996-03-08 |
| JP3127977B2 true JP3127977B2 (en) | 2001-01-29 |
Family
ID=16653220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06214286A Expired - Fee Related JP3127977B2 (en) | 1994-08-16 | 1994-08-16 | Thin motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3127977B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006136094A (en) * | 2004-11-04 | 2006-05-25 | Funai Electric Co Ltd | Rotator drive motor and its annular magnet attaching method |
-
1994
- 1994-08-16 JP JP06214286A patent/JP3127977B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0865985A (en) | 1996-03-08 |
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