JP2009247122A - Fixing tool and method of annular magnet, electric motor using the same, information device - Google Patents

Fixing tool and method of annular magnet, electric motor using the same, information device Download PDF

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JP2009247122A
JP2009247122A JP2008091127A JP2008091127A JP2009247122A JP 2009247122 A JP2009247122 A JP 2009247122A JP 2008091127 A JP2008091127 A JP 2008091127A JP 2008091127 A JP2008091127 A JP 2008091127A JP 2009247122 A JP2009247122 A JP 2009247122A
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annular magnet
magnet
jig
spacer
side yoke
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Takahisa Furuta
喬久 古田
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Panasonic Corp
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Panasonic Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To prevent an annular magnet constituting an electric motor for use in an information device from being scratched or chipped upon assembly, and to prevent thermal demagnetization when a thermosetting adhesive is cured. <P>SOLUTION: When assembling the annular magnet and a back yoke which constitute an electric motor for use in an information recording/reproducing device, the annular magnet 2 is prevented from being scratched or chipped by setting the annular magnet 2 while the columnar portion 4a at the distal end is lowered with respect to a spacer 3 by using a magnet fixing tool 30 consisting of a tool side yoke 4 composed of a magnetic material and arranged opposite to the magnetized surface of the annular magnet 2 with a gap in the radial direction, and the spacer 3 composed of a nonmagnetic material and arranged between the tool side yoke 4 and the magnetized surface in order to hold the tool side yoke 4 movably in the central axis direction of the annular magnet 2, thus preventing thermal demagnetization when the adhesive is cured. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、モータ等に用いられる環状磁石をバックヨークに固定する取り付け治具および、その固定方法、およびそれを用いて組み立てられたモータ、情報機器に関するものである。   The present invention relates to a mounting jig for fixing an annular magnet used for a motor or the like to a back yoke, a fixing method thereof, a motor assembled using the same, and an information device.

従来のハードディスク装置（以下、ＨＤＤと略記）において、環状磁石とバックヨークを精度良く固定する方法としては、例えば特許文献１に示すように、軟磁性体材料製の芯出し治具に軟磁性体製のバックヨーク部と複数極に着磁した回転磁石とを嵌合配置し、ＨＤＤで問題になるアウトガスやコンタミネーションが発生する可能性が低い熱硬化性接着剤を塗布し、高温状態に加熱して接着剤を硬化させ、バックヨーク部と回転磁石を固定する取り付け方法がある。この方法ではバックヨークにマグネットを固定するために軟磁性材料製治具を用いているので、マグネットを加熱する際のマグネットの熱減磁を防止することができる。   In a conventional hard disk device (hereinafter abbreviated as HDD), as a method for accurately fixing the annular magnet and the back yoke, for example, as shown in Patent Document 1, a soft magnetic material is placed on a centering jig made of a soft magnetic material. The back yoke unit made of magnets and rotating magnets magnetized on multiple poles are fitted and placed, and a thermosetting adhesive that is unlikely to cause outgas and contamination that causes problems with HDDs is applied and heated to a high temperature state. Then, there is an attachment method in which the adhesive is cured and the back yoke portion and the rotating magnet are fixed. In this method, since a jig made of a soft magnetic material is used to fix the magnet to the back yoke, thermal demagnetization of the magnet when the magnet is heated can be prevented.

しかし、環状磁石のバックヨークに対する芯出し精度を高くする為に、環状磁石と芯出し治具の半径隙間を小さく設定し、かつ取り付け治具を磁性体にすると、取り付け治具と環状磁石の脱着の際に互いに衝突やこすれを起こしやすくなり、環状磁石に傷や欠けが生じてしまう。そこで環状磁石の表面に傷などが入らないように保護する技術として、例えば特許文献２に示すように、環状磁石に熱収縮性フィルムを被せる方法を用いることが考えられる。この方法は、環状磁石を傷や欠けから保護するために熱収縮性フィルムを、環状磁石の外周面に被覆させ加熱空気に接触させることにより、熱収縮性フィルムを環状磁石に密着させ環状磁石の傷や欠けを防止することができる。
特開２００２−３１５２７８号公報 実開平０４−０９７４５８号公報 However, if the radial gap between the annular magnet and the centering jig is set small and the mounting jig is made of a magnetic material in order to increase the centering accuracy of the annular magnet with respect to the back yoke, the attachment jig and the annular magnet can be detached. In this case, it becomes easy to cause collision and rubbing with each other, and the annular magnet is damaged or chipped. Therefore, as a technique for protecting the surface of the annular magnet from being damaged, it is conceivable to use a method of covering the annular magnet with a heat-shrinkable film, as shown in Patent Document 2, for example. In this method, in order to protect the annular magnet from scratches and chipping, the outer periphery of the annular magnet is coated and brought into contact with the heated air, whereby the heat shrinkable film is brought into close contact with the annular magnet. Scratches and chipping can be prevented.
JP 2002-315278 A Japanese Utility Model Publication No. 04-097458

しかしながら、前記従来の技術では、環状磁石の外周側には熱収縮性フィルムを被覆させられるが、内周側には熱収縮性フィルムを被覆させることが困難であり、環状磁石内側の傷や欠けを防止できない。また、加熱空気に環状磁石を接触させるため環状磁石の熱減磁を防ぐことができない。   However, in the conventional technique, the outer periphery side of the annular magnet can be coated with a heat-shrinkable film, but it is difficult to cover the inner periphery side with the heat-shrinkable film, and scratches or chips on the inner side of the annular magnet are difficult. Cannot be prevented. In addition, since the annular magnet is brought into contact with the heated air, thermal demagnetization of the annular magnet cannot be prevented.

また、熱収縮性フィルムを一旦付着させると剥がすことは困難であり、さらに熱収縮性フィルムにしわなどが寄って見かけ上フィルムの厚みがばらついた状態となる。そのような状態でも環状磁石とステータ（電機子）とが回転中に衝突しないようにする為に、環状磁石とステータ間の空隙を大きくする必要が生じる。その結果モータの電磁変換効率が低下して消費電流が増大したり定格トルクが不足したりするといった性能上の問題が発生する。   Further, once the heat-shrinkable film is attached, it is difficult to peel off, and the heat-shrinkable film is wrinkled and the thickness of the film apparently varies. Even in such a state, in order to prevent the annular magnet and the stator (armature) from colliding during rotation, it is necessary to increase the gap between the annular magnet and the stator. As a result, the electromagnetic conversion efficiency of the motor is reduced, resulting in performance problems such as increased current consumption and insufficient rated torque.

そこで、本発明は、環状磁石の傷や欠け及び熱減磁を防止できる取り付け治具及び固定方法を提供することを目的とする。   Then, an object of this invention is to provide the attachment jig | tool and fixing method which can prevent the damage | damage and chip | tip of an annular magnet, and thermal demagnetization.

そして、この目的を達成するために本発明の磁石取り付け治具は、円筒形状をなすと共に内周円筒面もしくは外周円筒面を着磁面として着磁した環状磁石を、着磁面とは反対側にあたる環状磁石の円筒面においてバックヨークに嵌合して熱硬化性接着剤によって固定する磁石取り付け治具であって、環状磁石の着磁面に半径方向隙間を介して対向配置される磁性材料製の治具側ヨークと、治具側ヨークと着磁面との間に配置されると共に、治具側ヨークを環状磁石の中心軸方向に移動自在に保持する非磁性材料製のスペーサとを備えている。   In order to achieve this object, the magnet mounting jig of the present invention has a cylindrical shape and an annular magnet magnetized with the inner or outer cylindrical surface as a magnetized surface, on the side opposite to the magnetized surface. A magnet mounting jig that is fitted to a back yoke on a cylindrical surface of an annular magnet to be fixed and fixed by a thermosetting adhesive, and is made of a magnetic material that is opposed to the magnetized surface of the annular magnet via a radial gap. A jig-side yoke, and a spacer made of a non-magnetic material that is disposed between the jig-side yoke and the magnetized surface and movably holds the jig-side yoke in the central axis direction of the annular magnet. ing.

そして、第１の発明の磁石取り付け治具を用いると共に、治具側ヨークを着磁面に対して対向する位置よりも中心軸方向に離間させた状態で、環状磁石をスペーサに対してセットして、そのあとで治具側ヨークを着磁面に対して対向する位置まで移動し、その後に環状磁石にバックヨークを嵌合して固定する。   Then, the magnet mounting jig of the first invention is used, and the annular magnet is set with respect to the spacer in a state where the jig side yoke is separated from the position facing the magnetized surface in the central axis direction. After that, the jig side yoke is moved to a position facing the magnetized surface, and then the back yoke is fitted and fixed to the annular magnet.

また、第１の発明の磁石取り付け治具を用いると共に、環状磁石をバックヨークに固定した後で、環状磁石をスペーサに対してセットした状態で、治具側ヨークを着磁面から中心軸方向に離間させ、しかる後にスペーサから環状磁石を取り外す。   In addition, while using the magnet mounting jig of the first invention and fixing the annular magnet to the back yoke, the jig side yoke is moved from the magnetized surface to the central axis direction with the annular magnet set to the spacer. And then remove the annular magnet from the spacer.

また、この目的を達成するために本発明の磁石取り付け治具は、環状磁石の着磁面に半径方向隙間を介して対向配置される磁性材料製の治具側ヨーク本体部と、この治具側ヨーク本体部から環状磁石の着磁面に向かって半径方向に突出する複数個のリブ部とを備えている。   In order to achieve this object, a magnet mounting jig according to the present invention includes a jig-side yoke main body made of a magnetic material and disposed opposite to a magnetized surface of an annular magnet via a radial gap, and the jig. And a plurality of rib portions projecting radially from the side yoke main body portion toward the magnetized surface of the annular magnet.

以上のように本発明の磁石取り付け治具によれば、治具側ヨークを軸心方向に移動自在に保持する非磁性体材料製のスペーサを有しているので、それを用いて磁石を取り付けることによって、環状磁石と治具側ヨーク間における吸引力が小さくなるような状態でスペーサに環状磁石をセットし、その後治具側ヨークを着磁面に対して対向する位置まで移動させるので、環状磁石に治具側ヨークが衝突したり、こすれによる傷や欠けが発生したりすることを防止出来ると共に、接着剤を硬化させる際の高温状態における環状磁石の熱減磁を確実に防ぐことができる。   As described above, according to the magnet mounting jig of the present invention, since the jig-side yoke is provided with a spacer made of a non-magnetic material that is movable in the axial direction, the magnet is mounted using the spacer. As a result, the annular magnet is set on the spacer in a state where the attractive force between the annular magnet and the jig side yoke is reduced, and then the jig side yoke is moved to a position facing the magnetized surface. The jig side yoke can be prevented from colliding with the magnet, and scratches and chips caused by rubbing can be prevented, and thermal demagnetization of the annular magnet can be reliably prevented at a high temperature when the adhesive is cured. .

また、本発明の磁石取り付け方法によれば、環状磁石をバックヨークに固定した後で、環状磁石をスペーサに対してセットしたままの状態で、先に治具側ヨークを着磁面から中心軸方向に離間させて、治具側ヨークと環状磁石との間の吸引力を小さくして、しかる後にスペーサから環状磁石を取り外すようにするので、環状磁石に治具側ヨークが衝突したり、こすれによる傷や欠けが発生したりすることを防止出来ると共に、接着剤を硬化させる際の高温状態における環状磁石の熱減磁を確実に防ぐことができる。   Further, according to the magnet mounting method of the present invention, after fixing the annular magnet to the back yoke, the jig side yoke is first moved from the magnetized surface to the central axis while the annular magnet is set on the spacer. Since the ring magnet is removed from the spacer after the suction force between the jig side yoke and the ring magnet is reduced, and the ring magnet is removed from the spacer, the jig side yoke collides with the ring magnet. It is possible to prevent the occurrence of scratches and chipping due to the occurrence of heat, and to reliably prevent thermal demagnetization of the annular magnet in a high temperature state when the adhesive is cured.

以下に、本発明の環状磁石の取り付け治具、固定方法、それを用いたモータ、情報機器を図面とともに詳細に説明する。   Below, the attachment jig | tool of the annular magnet of this invention, the fixing method, the motor using the same, and information equipment are demonstrated in detail with drawing.

（実施の形態１）
図１は本発明の第１の実施の形態における磁石取り付け治具で組み立てた環状磁石２と磁気回路の一部を構成するバックヨークを兼ねたハブ１とを用いたＨＤＤ用のモータ１６の横断面図である。図１に示すようにこのモータ１６は、記録ディスク９を回転駆動するための装置であって、回転部材１２と静止部材１３と流体軸受装置１０とを備えている。 (Embodiment 1)
FIG. 1 shows the crossing of a motor 16 for HDD using an annular magnet 2 assembled by a magnet mounting jig and a hub 1 serving also as a back yoke constituting a part of a magnetic circuit in the first embodiment of the present invention. FIG. As shown in FIG. 1, the motor 16 is a device for rotationally driving the recording disk 9, and includes a rotating member 12, a stationary member 13, and a hydrodynamic bearing device 10.

本実施の形態における環状磁石２は略円環形状を成すと共に、磁性材料よりなるハブ１の内周側に熱硬化性接着剤にて固定されており、ステータ７と共に磁気回路を構成しモータ１６の回転駆動力を発生する。   The annular magnet 2 in the present embodiment has a substantially annular shape, and is fixed to the inner peripheral side of the hub 1 made of a magnetic material by a thermosetting adhesive, and constitutes a magnetic circuit together with the stator 7 to constitute a motor 16. Generates a rotational drive force.

なお、ハブ１には記録媒体である記録ディスク９が固定される。また環状磁石２はその内周円筒面が回転駆動用磁極として着磁される着磁面を有している。   Note that a recording disk 9 as a recording medium is fixed to the hub 1. The annular magnet 2 has a magnetized surface whose inner peripheral cylindrical surface is magnetized as a rotation driving magnetic pole.

ここで、環状磁石２をハブ１に固定するに当たって熱硬化性接着剤を使用する理由は下記による。   Here, the reason why the thermosetting adhesive is used for fixing the annular magnet 2 to the hub 1 is as follows.

すなわち、ハードディスクドライブ装置（以下、ＨＤＤと示す。）のように、高い記録密度で情報信号を記録再生する装置の場合、近年では記録再生用のヘッドと記録媒体であるディスクなどのメディア間の隙間は１０ｎｍ以下という極めて小さい値になってきている。このような状況においてわずかでもアウトガスによるコンタミネーション（汚染など）やパーティクル（異物など）がヘッドとメディア間に付着すると、ヘッドがコンタミネーションやパーティクルによってクラッシュする。そのため、アウトガスが少ない熱硬化性接着剤を用いることが必要になってきている。   That is, in the case of an apparatus that records and reproduces information signals at a high recording density, such as a hard disk drive apparatus (hereinafter referred to as HDD), in recent years, a gap between a recording / reproducing head and a medium such as a disk that is a recording medium. Has become an extremely small value of 10 nm or less. In this situation, if even slight outgas contamination (contamination, etc.) or particles (foreign matter, etc.) adhere between the head and the medium, the head will crash due to contamination or particles. Therefore, it has become necessary to use a thermosetting adhesive with little outgas.

なお、環状磁石２のサイズはＨＤＤでは、例えば外径φ１３〜φ２１ｍｍ、内径φ１０〜φ２０ｍｍ、高さは１〜８ｍｍ程度で、着磁極数は８〜１２極程度である。   In the HDD, the size of the annular magnet 2 is, for example, an outer diameter of φ13 to φ21 mm, an inner diameter of φ10 to φ20 mm, a height of about 1 to 8 mm, and the number of magnetic poles of about 8 to 12 poles.

またハブ１は記録媒体としての記録ディスク９を受ける役目を果たしており、そのサイズは、例えば最外径φ１４〜３３ｍｍ、環状磁石２を固定する内径はφ１０〜２２ｍｍ、高さは２〜１９ｍｍ程度である。   The hub 1 serves to receive a recording disk 9 as a recording medium. The size of the hub 1 is, for example, an outermost diameter φ14 to 33 mm, an inner diameter to fix the annular magnet 2 is φ10 to 22 mm, and a height is about 2 to 19 mm. is there.

次に、ハブ１に環状磁石２を熱硬化性接着剤で固定する工程を以下に説明する。図２は、磁石取り付け治具３０に環状磁石２が取付けられた状態の横断面図である。     Next, the process of fixing the annular magnet 2 to the hub 1 with a thermosetting adhesive will be described below. FIG. 2 is a cross-sectional view of the magnet attachment jig 30 with the annular magnet 2 attached thereto.

同図に示すように、磁石取り付け治具３０の上部には非磁性材料製のスペーサ３が配置されている。着磁治具側ヨーク（図示せず）によって事前に着磁された環状磁石２の着磁面側（内周面側）に、スペーサ３の上部を挿入する。スペーサ３は耐摩耗性の熱硬化性樹脂または液晶ポリマーなど、アウトガスが少ない材料で、弾性を有する物が好ましいが、金属製でも良い。   As shown in the figure, a spacer 3 made of a nonmagnetic material is disposed on the top of the magnet mounting jig 30. The upper part of the spacer 3 is inserted into the magnetized surface side (inner peripheral surface side) of the annular magnet 2 magnetized in advance by a magnetizing jig side yoke (not shown). The spacer 3 is made of a material with less outgas, such as a wear-resistant thermosetting resin or a liquid crystal polymer, and preferably has elasticity, but may be made of metal.

スペーサ３は断面がおよそＬ字形状を成し、図３に斜視図で示すように、スペーサ３の上部側は複数のスリット３ｄが設けられると共に、複数の円筒面からなる浮き上がり防止部３ａを形成している。   The spacer 3 has an approximately L-shaped cross section, and as shown in a perspective view in FIG. 3, a plurality of slits 3d are provided on the upper side of the spacer 3 and a lifting prevention portion 3a composed of a plurality of cylindrical surfaces is formed. is doing.

また、図２に示すようにスペーサ３の下方内周部には雌ねじ部３ｅが形成されている。この雌ねじ部３ｅと浮き上がり防止部３ａの円筒面とは同心状に配置されている。   Further, as shown in FIG. 2, a female screw portion 3 e is formed on the lower inner peripheral portion of the spacer 3. The female thread portion 3e and the cylindrical surface of the lifting prevention portion 3a are disposed concentrically.

さらに、スペーサ３には非磁性材料製の第２スペーサ２０が固着されている。この第２スペーサ２０は後述するようにスペーサ３の浮き上がり防止部３ａが弾性変形し易くするように変形部長さＨを大きく取ると共に、ハブ１に対する環状磁石２の相対位置を設計の狙い目の位置に設定するために設置する。   Further, a second spacer 20 made of a nonmagnetic material is fixed to the spacer 3. As will be described later, the second spacer 20 has a large deformed portion length H so that the floating preventing portion 3a of the spacer 3 is easily elastically deformed, and the relative position of the annular magnet 2 with respect to the hub 1 is the position of the design target. Install to set.

また、スペーサ３の内周には、先端円柱部４ａを有する磁性材料製の治具側ヨーク４が、さらに配置されている。この治具側ヨーク４の下方には、雄ねじ部４ｅが形成され、スペーサ３の雌ねじ部３ｅと螺合する。そして、治具側ヨーク４はスペーサ３に対して上下動可能に配設されている。なお、治具側ヨーク４はその下端で治具の基台であるベース６に接着固定されている。   In addition, a jig side yoke 4 made of a magnetic material having a tip cylindrical portion 4 a is further arranged on the inner periphery of the spacer 3. A male screw portion 4e is formed below the jig side yoke 4 and is screwed into the female screw portion 3e of the spacer 3. The jig side yoke 4 is arranged so as to be movable up and down with respect to the spacer 3. The jig side yoke 4 is bonded and fixed to a base 6 which is a base of the jig at the lower end.

環状磁石２をスペーサ３に嵌合させる際には、治具側ヨーク４の先端円柱部４ａを浮き上がり防止部３ａよりも下方に位置するように、ベース６とスペーサ３とを互いに回転させて雌ねじ部３ｅと雄ねじ部４ｅとを相対的に移動させる。この状態で環状磁石２をスペーサ３に嵌合させても、環状磁石２と治具側ヨーク４との間は離れているので両者間に磁気による強い吸引力は作用しない。その結果、環状磁石２とスペーサ３の隙間は数ミクロン〜１０数ミクロン程度の直径隙間まで小さくしてもスムーズに嵌合させることが出来る。   When the annular magnet 2 is fitted to the spacer 3, the base 6 and the spacer 3 are rotated relative to each other so that the tip cylindrical portion 4a of the jig-side yoke 4 is positioned below the lifting prevention portion 3a. The part 3e and the external thread part 4e are moved relatively. Even if the annular magnet 2 is fitted to the spacer 3 in this state, since the annular magnet 2 and the jig side yoke 4 are separated from each other, a strong attractive force due to magnetism does not act between them. As a result, even if the gap between the annular magnet 2 and the spacer 3 is reduced to a diameter gap of about several microns to several tens of microns, it can be smoothly fitted.

すなわち、環状磁石２とスペーサ３とが嵌合する際に、磁気による吸引力が作用しないので、傷、欠け、こすれなどは発生しない。   That is, when the annular magnet 2 and the spacer 3 are fitted, the magnetic attractive force does not act, so that no scratches, chips, or rubbing occurs.

そして、環状磁石２をスペーサ３にセットした後に、ベース６とスペーサ３とを互いに回転させて、図４に示すように先端円柱部４ａをスペーサ３の浮き上がり防止部３ａの上部に設けた突起部３ｂの内周側に食い込ませ、浮き上がり防止部３ａを弾性変形させて外周側（径方向外側）に拡径させる。その結果、浮き上がり防止部３ａの外周は環状磁石２の内周に当接し、環状磁石２は浮き上がり防止部３ａによってしっかりと保持される。   Then, after the annular magnet 2 is set on the spacer 3, the base 6 and the spacer 3 are rotated with each other, and as shown in FIG. 4, the tip cylindrical portion 4a is provided on the upper portion of the rising prevention portion 3a of the spacer 3. 3b is made to bite into the inner peripheral side, and the floating prevention portion 3a is elastically deformed to expand the diameter to the outer peripheral side (radially outer side). As a result, the outer periphery of the lifting prevention portion 3a abuts on the inner periphery of the annular magnet 2, and the annular magnet 2 is firmly held by the lifting prevention portion 3a.

次に、図５に示すように、ハブ１を環状磁石２に嵌合させる。環状磁石２が固定されるハブ１の内周円筒面には熱硬化性接着剤を塗布している。ここで、ハブ１が環状磁石２に軸方向上方から近接すると両者間には磁気による吸引力が働き、環状磁石２は接近してきたハブ１に向かって浮き上がろうとする。   Next, as shown in FIG. 5, the hub 1 is fitted to the annular magnet 2. A thermosetting adhesive is applied to the inner peripheral cylindrical surface of the hub 1 to which the annular magnet 2 is fixed. Here, when the hub 1 approaches the annular magnet 2 from above in the axial direction, a magnetic attractive force acts between the two, and the annular magnet 2 tends to float toward the approaching hub 1.

しかし、本実施の形態によれば、環状磁石２は浮き上がり防止部３ａによってしっかりと保持されているので、スペーサ３から離脱することは無い。   However, according to the present embodiment, the annular magnet 2 is firmly held by the lifting prevention portion 3a, and therefore does not detach from the spacer 3.

この状態で有天円筒状のハブ１は、天面中央部に設けられた位置決め用孔と治具側ヨーク４の先端円柱部４ａ上方に設けたハブガイド部４ｆによって芯出しされると共にスムーズに降下して磁石取り付け治具３０にセットされる。   In this state, the cylindrical hub 1 is centered by a positioning hole provided at the center of the top surface and a hub guide 4f provided above the tip cylindrical portion 4a of the jig side yoke 4 and smoothly. Lower and set on the magnet mounting jig 30.

なお、ハブガイド部４ｆと先端円柱部４ａとは一体加工されて互いの同軸度が高くなるように加工されている。またスペーサ３の浮き上がり防止部３ａと、突起部３ｂとの間も同軸度が高くなるように加工されている。その結果、ハブ１と環状磁石２は互いに高い同軸度を確保して治具上で保持される。   The hub guide portion 4f and the tip cylindrical portion 4a are integrally processed so as to increase the degree of coaxiality with each other. Also, the space between the spacer 3 and the protrusion 3b is processed so that the degree of coaxiality is high. As a result, the hub 1 and the annular magnet 2 are held on a jig while ensuring a high degree of coaxiality.

このようにハブ１が環状磁石２に対して芯出し嵌合して磁石取り付け治具３０にセットされた状態で、磁石取り付け治具３０全体を図示しない加熱炉内に入れて所定時間加熱して、接着剤を硬化させる。通常、ＨＤＤに使用される熱硬化性接着剤は８０〜８５℃程度の環境で１〜２時間程度で硬化する。   In this manner, with the hub 1 centered and fitted to the annular magnet 2 and set in the magnet mounting jig 30, the entire magnet mounting jig 30 is placed in a heating furnace (not shown) and heated for a predetermined time. , Cure the adhesive. Usually, the thermosetting adhesive used for HDD hardens in about 1 to 2 hours in an environment of about 80 to 85 ° C.

このとき、ハブ１と治具側ヨーク４と環状磁石２との間で閉磁路Ｌを形成しているので、加熱炉内の高温環境下に長時間曝露されても環状磁石が熱減磁を生ずることを防止することが出来ると共に、モータの効率を劣化させずに環状磁石２をハブ１（バックヨーク）に精度良く固定できる。   At this time, since the closed magnetic path L is formed between the hub 1, the jig side yoke 4, and the annular magnet 2, the annular magnet is thermally demagnetized even if exposed to a high temperature environment in the heating furnace for a long time. It can be prevented from occurring, and the annular magnet 2 can be accurately fixed to the hub 1 (back yoke) without deteriorating the efficiency of the motor.

なお、加熱中における環状磁石の動作点（パーミアンス係数）は、磁石材料の抗磁力ｉＨｃと残留磁束密度Ｂｒにもよるが、おおむね１以上に設定することが望ましい。より望ましくは２以上であれば、加熱硬化時間を短縮するために１００℃程度の加熱炉を用いてもほとんどの磁石材料において熱減磁を防止することが出来る。   The operating point (permeance coefficient) of the annular magnet during heating depends on the coercive force iHc and the residual magnetic flux density Br of the magnet material, but is preferably set to 1 or more. More preferably, if it is 2 or more, most magnet materials can prevent thermal demagnetization even if a heating furnace of about 100 ° C. is used to shorten the heat curing time.

そして、接着剤が加熱硬化したあと、加熱炉から磁石取り付け治具３０全体を取り出し、治具が冷却されてから環状磁石２と一体化したハブ１を治具から取り外す。このとき、ベース６とスペーサ３とを反対方向に回転させて、図６に示すように治具側ヨーク４の先端円柱部４ａをスペーサ３の突起部３ｂから軸方向に離間させることで浮き上がり防止部３ａを縮径させる。   Then, after the adhesive is heat-cured, the entire magnet attachment jig 30 is taken out from the heating furnace, and the hub 1 integrated with the annular magnet 2 is removed from the jig after the jig is cooled. At this time, the base 6 and the spacer 3 are rotated in opposite directions, and the tip cylindrical portion 4a of the jig side yoke 4 is axially separated from the protrusion 3b of the spacer 3 as shown in FIG. The diameter of the part 3a is reduced.

その結果、浮き上がり防止部３ａの外周と環状磁石２の内周の間に隙間ができるので、大きな力を加えることなく容易にスペーサ３から環状磁石２を外すことが可能になる。   As a result, since a gap is formed between the outer periphery of the lifting prevention portion 3a and the inner periphery of the annular magnet 2, the annular magnet 2 can be easily detached from the spacer 3 without applying a large force.

ここで、環状磁石２を磁石取り付け治具３０から取り外す際は、環状磁石２と治具側ヨーク４の先端円柱部４ａとは軸方向にずれた状態にあるので、治具側ヨーク４と環状磁石２の間に磁気による大きな吸引力が働くことはない。したがって、環状磁石２がスペーサ３から離間する際に、傷、欠け、こすれなどは発生しない。   Here, when the annular magnet 2 is removed from the magnet attachment jig 30, the annular magnet 2 and the tip cylindrical portion 4a of the jig side yoke 4 are in a state of being shifted in the axial direction. A large magnetic attraction force does not work between the magnets 2. Therefore, when the annular magnet 2 is separated from the spacer 3, no scratch, chipping, rubbing or the like occurs.

なお、上記実施の形態の説明においては、治具側ヨーク４とスペーサ３とは雄ねじ部４ｅ，雌ねじ部３ｅとが螺合して、相対的に移動自在な構成としたが、本発明はこれに限定される物ではない。例えば図７に示すように、スペーサ３は治具側ヨーク４のガイド軸部４ｇで支持され、スペーサ３とベース６間に圧縮バネ１５を配置して、スペーサ３と治具側ヨーク４とが相対的に移動自在な構成としても良い。   In the description of the above embodiment, the jig side yoke 4 and the spacer 3 are configured such that the male screw portion 4e and the female screw portion 3e are screwed together to be relatively movable. It is not a thing limited to. For example, as shown in FIG. 7, the spacer 3 is supported by a guide shaft portion 4g of the jig side yoke 4, and a compression spring 15 is disposed between the spacer 3 and the base 6, so that the spacer 3 and the jig side yoke 4 are connected. A relatively movable configuration may be used.

ここで、接着剤を硬化させるときには治具側ヨーク４の先端円柱部４ａが環状磁石２の内周側に位置するように、圧縮バネ１５の反力に打ち勝つおもり（図示せず）をハブ１の上から載せる。このように構成することで、ネジ形成が不要になり、治具部品の製造が容易になり、製造コストの抑制が可能になる。またネジ部からパーティクルが発生することも抑制できる。なお圧縮バネの代わりに電磁プランジャなどを用いて上下動する構成としても良い。   Here, when the adhesive is hardened, a weight (not shown) that overcomes the reaction force of the compression spring 15 is placed on the hub 1 so that the tip cylindrical portion 4a of the jig side yoke 4 is located on the inner peripheral side of the annular magnet 2. Put it on the top. Such a configuration eliminates the need for screw formation, facilitates manufacture of jig parts, and reduces manufacturing costs. Further, generation of particles from the screw portion can be suppressed. In addition, it is good also as a structure which moves up and down using an electromagnetic plunger etc. instead of a compression spring.

また上記実施の形態の説明においては、環状磁石２がスペーサ３にて保持された状態においてハブ１が近接したときに、環状磁石２が浮き上がることを防止するために、図３に示すように複数箇所のスリット３ｄを有するスペーサ３を用いたが、本発明はこれに限定される物ではない。例えば図８に示すように、第２スペーサ１２０内周部で、環状磁石２の下端面が当接する位置に複数個のエアー吸い込み口１５０を設けても良い。   Further, in the description of the above embodiment, in order to prevent the annular magnet 2 from being lifted when the hub 1 approaches in the state where the annular magnet 2 is held by the spacer 3, as shown in FIG. Although the spacer 3 having the slits 3d is used, the present invention is not limited to this. For example, as shown in FIG. 8, a plurality of air suction ports 150 may be provided at a position where the lower end surface of the annular magnet 2 abuts on the inner periphery of the second spacer 120.

この場合、スペーサ１０３は単純な断面Ｌ字形状であり、上記実施の形態のように弾性変形させるためのスリットは有していない。そして環状磁石２をスペーサ１０３上に配置した後で、治具側ヨーク１０４の先端円柱部１０４ａが環状磁石２の内周面に対向する位置まで移動させてからエアー吸い込み口１５０からエアー吸引する構成としても良い。   In this case, the spacer 103 has a simple L-shaped cross section, and does not have a slit for elastic deformation as in the above embodiment. And after arrange | positioning the annular magnet 2 on the spacer 103, after moving the front-end | tip cylindrical part 104a of the jig | tool side yoke 104 to the position which opposes the internal peripheral surface of the annular magnet 2, air is sucked from the air suction port 150. It is also good.

なお、ハブ１と環状磁石２とが嵌合したあとはエアー吸引を停止しても構わない。またこの構成の場合、環状磁石２をエアー吸引させつつハブ１と環状磁石２とを嵌合させ、しかる後に治具側ヨーク１０４の先端円柱部１０４ａが環状磁石２の内周面に対向する位置まで移動させても良い。このような構成とすることでスペーサ１０３の先端形状は弾性変形を考慮する必要が無くなるので、治具の設計自由度が高くなり、治具の、特に高さ方向の寸法低減を図ることが可能になる。これにより加熱炉内に、より多くの台数の磁石取り付け治具１３０を配置することが可能になり、バッチ処理における処理数の増加が可能になる。   Note that air suction may be stopped after the hub 1 and the annular magnet 2 are fitted. Further, in the case of this configuration, the hub 1 and the annular magnet 2 are fitted while the annular magnet 2 is attracted by air, and then the tip cylindrical portion 104a of the jig side yoke 104 is opposed to the inner peripheral surface of the annular magnet 2. It may be moved to. By adopting such a configuration, the shape of the tip of the spacer 103 does not need to be considered for elastic deformation, so the design freedom of the jig is increased, and the jig can be reduced particularly in the height direction. become. As a result, a larger number of magnet mounting jigs 130 can be arranged in the heating furnace, and the number of processes in batch processing can be increased.

（実施の形態２）
図９（ａ）は本発明の実施の形態２の磁石取り付け治具の平面図、図９（ｂ）は同治具に環状磁石がセットされた状態の断面図である。本実施の形態における磁石取り付け治具２３０は図９（ｂ）に示すように、ベース２０６上に治具側ヨーク２０４が植立されている。この治具側ヨーク２０４は磁性材料製の治具側ヨーク本体部２０４ａと、ハブガイド部２０４ｆと、図９（ａ）に示すようにリブ部２０４ｈとを有している。治具側ヨーク本体部２０４ａは円柱形状また円筒形状をなしている。 (Embodiment 2)
FIG. 9A is a plan view of a magnet mounting jig according to Embodiment 2 of the present invention, and FIG. 9B is a cross-sectional view of a state where an annular magnet is set on the jig. As shown in FIG. 9B, the magnet attachment jig 230 in the present embodiment has a jig-side yoke 204 planted on the base 206. The jig side yoke 204 has a jig side yoke main body 204a made of a magnetic material, a hub guide part 204f, and a rib part 204h as shown in FIG. 9A. The jig side yoke main body 204a has a columnar shape or a cylindrical shape.

さらに、この治具側ヨーク本体部２０４ａの外周からは、環状磁石２の着磁面に向けて、半径方向に複数個のリブ部２０４ｈが突出している。このリブ部２０４ｈは非磁性材料製であり、治具側ヨーク本体部２０４ａに接着や圧入などの手段で適宜固着されてから図９（ｂ）に示すハブガイド部２０４ｆと共に旋削されてハブガイド部２０４ｆとの高い同軸度が確保されている。   Further, a plurality of rib portions 204 h protrude in the radial direction from the outer periphery of the jig-side yoke body portion 204 a toward the magnetized surface of the annular magnet 2. The rib portion 204h is made of a non-magnetic material, and is appropriately fixed to the jig-side yoke body portion 204a by means such as adhesion or press fitting, and then turned together with the hub guide portion 204f shown in FIG. A high degree of coaxiality with 204f is ensured.

ここで、リブ部２０４ｈは弾性変形できるように薄肉に形成してある。またリブ部２０４ｈの軸方向高さの中央付近には、環状磁石２との接触領域の面積を小さくする為に逃げ部２０４ｉを設けている。   Here, the rib portion 204h is formed thin so as to be elastically deformable. Further, an escape portion 204i is provided near the center of the height in the axial direction of the rib portion 204h in order to reduce the area of the contact area with the annular magnet 2.

治具側ヨーク本体部２０４ａと環状磁石２の間の半径隙間は、図示しないハブが環状磁石２に嵌合した状態で、環状磁石２の動作点（パーミアンス係数）が１以上１０未満程度になるように設定してある。   The radial gap between the jig-side yoke body 204a and the annular magnet 2 is such that the operating point (permeance coefficient) of the annular magnet 2 is about 1 or more and less than 10 in a state where a hub (not shown) is fitted to the annular magnet 2. It is set as follows.

以上のように構成された本実施の形態における磁石取り付け治具２３０を用いた磁石取り付け方法に関して以下説明する。   A magnet mounting method using the magnet mounting jig 230 in the present embodiment configured as described above will be described below.

治具側ヨーク本体部２０４ａから突出したリブ部２０４ｈは治具側ヨーク本体部２０４ａと環状磁石の間の半径隙間を一定に維持するように一定ピッチで配設されている。そしてハブガイド部２０４ｆに対して高い同軸度をもって配置されているので、環状磁石２をハブガイド部２０４ｆに対して精度良くセットすることが可能になる。ここでリブ部２０４ｈは環状磁石２の内周面と接触する領域はわずかであるので、リブ部２０４ｈの外径が環状磁石２の内径よりも数ミクロン〜数１０ミクロン程度大きくとも、環状磁石２にリブ部２０４ｈを挿入する際に発生する摩擦力を極めて小さくすることが出来る。また治具側ヨーク本体部２０４ａと環状磁石２との間も一定の半径隙間を介しているので、環状磁石２と治具側ヨーク本体部２０４ａとの間の磁気による吸引力も小さくできる。   The ribs 204h protruding from the jig-side yoke body 204a are arranged at a constant pitch so as to maintain a constant radial gap between the jig-side yoke body 204a and the annular magnet. And since it is arrange | positioned with high coaxiality with respect to the hub guide part 204f, it becomes possible to set the annular magnet 2 with respect to the hub guide part 204f with high precision. Here, since the rib portion 204h has a small area in contact with the inner peripheral surface of the annular magnet 2, even if the outer diameter of the rib portion 204h is about several microns to several tens of microns larger than the inner diameter of the annular magnet 2. The frictional force generated when the rib portion 204h is inserted into can be made extremely small. In addition, since a fixed radial gap is provided between the jig-side yoke main body 204a and the annular magnet 2, the magnetic attractive force between the annular magnet 2 and the jig-side yoke main body 204a can be reduced.

したがって環状磁石２を磁石取り付け治具２３０に配置する際、または取り外す際に環状磁石２の内周円筒面に傷や欠けを生ずることはほとんど無い。さらにハブを嵌合させて熱硬化性接着剤を用いて加熱炉内で加熱する際も、環状磁石２の動作点を１以上１０未満程度になるように設定してあるので、熱減磁を生ずる心配もない。   Therefore, when the annular magnet 2 is arranged on the magnet mounting jig 230 or removed, the inner peripheral cylindrical surface of the annular magnet 2 is hardly damaged or chipped. Further, when the hub is fitted and heated in a heating furnace using a thermosetting adhesive, the operating point of the annular magnet 2 is set to be about 1 to less than 10, so that the thermal demagnetization is reduced. There is no worry about it.

また、リブ部と治具側ヨーク本体部を一体化できるので治具の精度がより高くでき、バックヨークに対する環状磁石の芯出し精度を高くすることが可能になる。   Further, since the rib portion and the jig side yoke main body can be integrated, the accuracy of the jig can be further increased, and the centering accuracy of the annular magnet with respect to the back yoke can be increased.

この結果、環状磁石に傷や欠けを生ずることなく、環状磁石をハブに精度良く固定できる。また熱減磁など生ずることなく、電磁変換効率が高いモータ並びにＨＤＤを提供することが可能になる。   As a result, the annular magnet can be accurately fixed to the hub without causing damage or chipping to the annular magnet. In addition, it is possible to provide a motor and an HDD having high electromagnetic conversion efficiency without causing thermal demagnetization.

なお、上記説明においてはリブ部２０４ｈを非磁性材料製としたが、本発明はこれに限定されるものではない。リブ部２０４ｈの厚みが小さければ磁性材料製としても良い。   In the above description, the rib portion 204h is made of a nonmagnetic material, but the present invention is not limited to this. If the thickness of the rib portion 204h is small, it may be made of a magnetic material.

またベース２０６上には薄い軟磁性材料製の吸引板（図示せず）またはエアー吸い込み口（図示せずを設けて、ハブを環状磁石に嵌合させる際の環状磁石２の浮き上がりを防止する構成としても良い。   Further, a thin soft magnetic material suction plate (not shown) or air suction port (not shown) is provided on the base 206 to prevent the annular magnet 2 from being lifted when the hub is fitted to the annular magnet. It is also good.

なお、上記実施の形態の説明においては、環状磁石の内周円筒面を駆動用磁極の着磁面とした構成を例に挙げたが、本発明はこれに限定される物ではない。例えば、環状磁石の外周面側に駆動用磁極を設けて、さらにその外周側にステータを配置したいわゆるインナーロータタイプのモータにも適用できることは言うまでもない。   In the description of the above embodiment, the configuration in which the inner peripheral cylindrical surface of the annular magnet is the magnetized surface of the driving magnetic pole is taken as an example, but the present invention is not limited to this. For example, it goes without saying that the present invention can also be applied to a so-called inner rotor type motor in which a driving magnetic pole is provided on the outer peripheral surface side of an annular magnet and a stator is further disposed on the outer peripheral side.

また、本発明の実施形態はＨＤＤを例に挙げて説明してきたが、本発明はこれに限定されるものではない。例えば記録媒体として光ディスク、光磁気ディスク等の光学式のディスク装置用に用いられるスピンドルモータでも良い。さらに、レーザスキャナなどに用いられるポリゴンミラーを駆動するスピンドルモータなどに適用しても良い。   Further, although the embodiments of the present invention have been described by taking the HDD as an example, the present invention is not limited to this. For example, a spindle motor used for an optical disk device such as an optical disk or a magneto-optical disk may be used as a recording medium. Furthermore, the present invention may be applied to a spindle motor that drives a polygon mirror used in a laser scanner or the like.

さらに、図１０に示すように、上記構成を有するモータ１６を搭載しており、記録ヘッド１１によって記録ディスク９に記録された情報を再生したり、記録ディスク９に対して情報を記録したりするＨＤＤなどの情報装置８に対して本発明を適用することもできる。これによりモータ１６を組み立てる際に環状磁石２上に傷、欠けなどの発生とそれに伴って生ずるパーティクルの発生を確実に防止できると共に、熱減磁が発生せず、しかもモータの電磁変換効率が高く消費電流が小さいＨＤＤを提供することが出来る。   Further, as shown in FIG. 10, the motor 16 having the above-described configuration is mounted, and information recorded on the recording disk 9 is reproduced by the recording head 11 and information is recorded on the recording disk 9. The present invention can also be applied to an information device 8 such as an HDD. As a result, when the motor 16 is assembled, it is possible to surely prevent the occurrence of scratches, chips, etc. on the annular magnet 2 and the generation of particles accompanying it, and no thermal demagnetization occurs, and the electromagnetic conversion efficiency of the motor is high. An HDD with low current consumption can be provided.

本発明にかかる環状磁石の取り付け治具、固定方法は、モータ等に用いられる円筒状環状磁石の傷や欠け、熱減磁を防止できるので、情報記録再生装置等の情報機器に用いるスピンドルモータに有用である。   The mounting jig and fixing method of the annular magnet according to the present invention can prevent scratches and chipping of the cylindrical annular magnet used in the motor and the like, and thermal demagnetization, so that the spindle motor used in information equipment such as an information recording / reproducing apparatus can be used. Useful.

本発明の実施の形態１に係る流体軸受装置を含むモータの断面図Sectional drawing of the motor containing the hydrodynamic bearing apparatus which concerns on Embodiment 1 of this invention 本発明の実施の形態１の磁石取り付け治具の断面図Sectional drawing of the magnet attachment jig | tool of Embodiment 1 of this invention 本発明に実施の形態１のスペーサの斜視図The perspective view of the spacer of Embodiment 1 in this invention 本発明の実施の形態１の磁石取り付け治具に環状磁石をセットした状態の断面図Sectional drawing of the state which set the annular magnet to the magnet attachment jig | tool of Embodiment 1 of this invention 本発明の実施の形態１の磁石取り付け治具に環状磁石とハブとをセットした状態の断面図Sectional drawing of the state which set the annular magnet and the hub to the magnet attachment jig of Embodiment 1 of this invention 本発明の実施の形態１の磁石取り付け治具において環状磁石浮き上がり防止機能を解除した状態の断面図Sectional drawing of the state which cancelled | released the annular magnet floating prevention function in the magnet attachment jig | tool of Embodiment 1 of this invention 本発明の他の実施の形態における磁石取り付け治具の断面図Sectional drawing of the magnet attachment jig in other embodiment of this invention 本発明の他の実施の形態における磁石取り付け治具の断面図Sectional drawing of the magnet attachment jig in other embodiment of this invention （ａ）本発明の実施の形態２における磁石取り付け治具の平面図、（ｂ）本発明の実施の形態２における磁石取り付け治具の断面図(A) A plan view of a magnet mounting jig according to Embodiment 2 of the present invention, (b) a sectional view of a magnet mounting jig according to Embodiment 2 of the present invention. 本発明の実施の形態１に係る記録再生装置の構成を示す断面図Sectional drawing which shows the structure of the recording / reproducing apparatus which concerns on Embodiment 1 of this invention

符号の説明Explanation of symbols

１ ハブ（バックヨーク）
２ 環状磁石
３，１０３ スペーサ
３ａ 浮き上がり防止部
３ｂ 突起部
３ｄ スリット
３ｅ，１０３ｅ 雌ねじ部
４，１０４，２０４ 治具側ヨーク
４ａ，１０４ａ 先端円柱部
４ｅ 雄ねじ部
４ｆ，２０４ｆ ハブガイド部
４ｇ ガイド軸部
２０４ｈ リブ部
２０４ｉ 逃げ部
６ ベース
７ ステータ
８ 情報装置
９ 記録ディスク
１０ 流体軸受装置
１１ 記録ヘッド
１２ 回転部材
１３ 静止部材
１５ 圧縮バネ
１６ モータ
２０，１２０ 第２スペーサ
３０，１３０，２３０ 磁石取り付け治具
１５０ エアー吸い込み口 1 Hub (back yoke)
2 Ring magnet 3, 103 Spacer 3a Lifting prevention portion 3b Protruding portion 3d Slit 3e, 103e Female thread portion 4, 104, 204 Jig side yoke 4a, 104a End cylindrical portion 4e Male thread portion 4f, 204f Hub guide portion 4g Guide shaft portion 204h Rib portion 204i Escape portion 6 Base 7 Stator 8 Information device 9 Recording disk 10 Fluid bearing device 11 Recording head 12 Rotating member 13 Stationary member 15 Compression spring 16 Motor 20, 120 Second spacer 30, 130, 230 Magnet mounting jig 150 Air Suction mouth

Claims (7)

円筒形状をなすと共に内周円筒面もしくは外周円筒面を着磁面として着磁した環状磁石を、前記着磁面とは反対側にあたる前記環状磁石の円筒面においてバックヨークに嵌合して熱硬化性接着剤によって固定する磁石取り付け治具であって、
前記環状磁石の着磁面に半径方向隙間を介して対向配置される磁性材料製の治具側ヨークと、
前記治具側ヨークと前記着磁面との間に配置されると共に、前記治具側ヨークを前記環状磁石の中心軸方向に移動自在に保持する非磁性材料製のスペーサとを備えている磁石取り付け治具。 An annular magnet having a cylindrical shape and magnetized with the inner or outer cylindrical surface as a magnetized surface is fitted into a back yoke on the cylindrical surface of the annular magnet opposite to the magnetized surface, and is thermoset. A magnet mounting jig that is fixed by a adhesive,
A jig-side yoke made of a magnetic material disposed opposite to the magnetized surface of the annular magnet via a radial gap;
A magnet that is disposed between the jig side yoke and the magnetized surface and includes a spacer made of a nonmagnetic material that holds the jig side yoke movably in the central axis direction of the annular magnet. Mounting jig. 請求項１に記載の磁石取り付け治具を用いて前記バックヨークに前記環状磁石を固定する磁石取り付け方法であって、
前記治具側ヨークを前記着磁面に対して対向する位置よりも前記中心軸方向に離間させた状態で、前記環状磁石を前記スペーサに対してセットし、
前記治具側ヨークを前記着磁面に対して対向する位置まで移動し、
その後に前記環状磁石に前記バックヨークを嵌合して固定する磁石取り付け方法。 A magnet mounting method for fixing the annular magnet to the back yoke using the magnet mounting jig according to claim 1,
In a state where the jig side yoke is spaced apart in the central axis direction from the position facing the magnetized surface, the annular magnet is set with respect to the spacer,
Move the jig side yoke to a position facing the magnetized surface,
A magnet mounting method for fitting and fixing the back yoke to the annular magnet. 請求項１に記載の磁石取り付け治具を用いて前記バックヨークに前記環状磁石を固定する磁石取り付け方法であって、
前記環状磁石を前記バックヨークに固定した後で、前記環状磁石を前記スペーサに対してセットした状態で、前記治具側ヨークを前記着磁面から前記中心軸方向に離間させ、
その後に前記スペーサから前記環状磁石を取り外す磁石取り付け方法。 A magnet mounting method for fixing the annular magnet to the back yoke using the magnet mounting jig according to claim 1,
After fixing the annular magnet to the back yoke, with the annular magnet set with respect to the spacer, the jig side yoke is separated from the magnetized surface in the central axis direction,
A magnet mounting method for subsequently removing the annular magnet from the spacer. 請求項２または請求項３に記載の磁石取り付け方法を用いて、前記環状磁石と前記バックヨークとを互いに固定したモータ。   The motor which fixed the said annular magnet and the said back yoke mutually using the magnet attachment method of Claim 2 or Claim 3. 円筒形状をなすと共に内周円筒面もしくは外周円筒面を着磁面として着磁した環状磁石を、前記着磁面とは反対側にあたる前記環状磁石の円筒面においてバックヨークに嵌合して熱硬化性接着剤によって固定する磁石取り付け治具であって、
前記環状磁石の着磁面に半径方向隙間を介して対向配置される磁性材料製の治具側ヨーク本体部と、
この治具側ヨーク本体部から前記環状磁石の着磁面に向かって半径方向に突出する複数個のリブ部とを備えている磁石取り付け治具。 An annular magnet having a cylindrical shape and magnetized with the inner or outer cylindrical surface as a magnetized surface is fitted into a back yoke on the cylindrical surface of the annular magnet opposite to the magnetized surface, and is thermoset. A magnet mounting jig that is fixed by a adhesive,
A jig-side yoke main body made of a magnetic material disposed opposite to the magnetized surface of the annular magnet via a radial gap;
A magnet mounting jig comprising a plurality of rib portions projecting radially from the jig-side yoke main body portion toward the magnetized surface of the annular magnet. 請求項５に記載の磁石取り付け治具を用いて、前記環状磁石と前記バックヨークとを互いに固定したモータ。   A motor in which the annular magnet and the back yoke are fixed to each other using the magnet mounting jig according to claim 5. 請求項４または請求項６に記載のモータを備えた情報機器。   An information device comprising the motor according to claim 4.
JP2008091127A 2008-03-31 2008-03-31 Fixing tool and method of annular magnet, electric motor using the same, information device Pending JP2009247122A (en)

Priority Applications (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8780493B1 (en) 2013-02-13 2014-07-15 Samsung Electro-Mechanics Co., Ltd. Spindle motor and recording disk driving device including the same
JP2017082150A (en) * 2015-10-30 2017-05-18 アズビル株式会社 Adhesion method
CN109698592A (en) * 2019-02-26 2019-04-30 邵阳学院 Permanent magnet machine rotor pastes magnetic shoe auxiliary device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8780493B1 (en) 2013-02-13 2014-07-15 Samsung Electro-Mechanics Co., Ltd. Spindle motor and recording disk driving device including the same
JP2014155433A (en) * 2013-02-13 2014-08-25 Samsung Electro-Mechanics Co Ltd Spindle motor and recording disk drive device including the same
JP2017082150A (en) * 2015-10-30 2017-05-18 アズビル株式会社 Adhesion method
CN109698592A (en) * 2019-02-26 2019-04-30 邵阳学院 Permanent magnet machine rotor pastes magnetic shoe auxiliary device

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