JP2007104796A - Step motor - Google Patents
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Abstract
Description
本発明は、小型でコイン型の外形を有する振動モータあるいは小型のファンモータに適用できるステップモータに関する。 The present invention relates to a step motor applicable to a vibration motor having a small coin-shaped outer shape or a small fan motor.
まず、振動モータの従来の技術について説明する。 First, the prior art of a vibration motor will be described.
図３に従来の振動モータの平面図（ａ）とＣ−Ｃ断面図（ｂ）を示す。従来の振動モータ３０は、矩形の外形を有し、２極の扁平ステータ３１と、該扁平ステータ３１に設けられたロータ穴３１ａに配置され、該扁平ステータ３１とギャップ３１ｂを介して磁気結合し、ロータ穴３１ａに設けられた段差３１ｃと３１ｄによって発生するディテントトルクによって静止する永久磁石３２ａから成るロータ３２と、該扁平ステータ３１に磁気結合する、コイル巻心３３ａに巻き回されたコイル３３ｂとから成る駆動コイル３３から構成され、ロータ軸３２ｂには偏心重り３５が取り付けられており、該振動モータ３０は、電源のみの外部端子（図示せず）を持つ１チップに集積化されたドライバＩＣ３６に電源を印加すると、図１０の従来のステップモータの磁気回路に示すように、図３に示す駆動コイル３３の起磁力ｎｉ（ｎはコイル３３ｂの巻数、ｉは駆動電流）１０１は、主にギャップ３１ｂの磁気抵抗Ｒｇ１０３ａと１０３ｂを通して永久磁石３２ａの起磁力Ｍｍ１０２に働き、ロータ３２は高速に回転し、該偏心重り３５に遠心力が働いて振動を発生し振動モータとして機能するが、該偏心重り３５は前記ロータ軸３２ｂと駆動コイル３３の間に配置されており、その半径が制限されているので、該偏心重り３５に働く遠心力をその半径を大きくすることによってではなくその厚みを厚くすることによって出しているために、振動モータ３０の厚みは大きくなってしまっている。なお、該振動モータ３０を高速回転させる駆動方法は特許文献１に詳しく説明されているのでその説明は省略する。 FIG. 3 shows a plan view (a) and a CC sectional view (b) of a conventional vibration motor. The conventional vibration motor 30 has a rectangular outer shape, is disposed in a two-pole flat stator 31 and a rotor hole 31a provided in the flat stator 31, and is magnetically coupled to the flat stator 31 via a gap 31b. A rotor 32 composed of a permanent magnet 32a that is stationary by a detent torque generated by steps 31c and 31d provided in the rotor hole 31a, and a coil 33b wound around a coil core 33a that is magnetically coupled to the flat stator 31. The rotor shaft 32b is provided with an eccentric weight 35. The vibration motor 30 is a driver IC 36 integrated on a single chip having an external terminal (not shown) for power supply only. As shown in the magnetic circuit of the conventional stepping motor in FIG. The force ni (n is the number of turns of the coil 33b, i is the driving current) 101 acts on the magnetomotive force Mm102 of the permanent magnet 32a mainly through the magnetic resistances Rg103a and 103b of the gap 31b, and the rotor 32 rotates at high speed, and the eccentric weight The centrifugal force acts on the shaft 35 to generate vibration and function as a vibration motor. However, the eccentric weight 35 is disposed between the rotor shaft 32b and the drive coil 33, and its radius is limited. Since the centrifugal force acting on the weight 35 is generated not by increasing its radius but by increasing its thickness, the thickness of the vibration motor 30 has increased. The driving method for rotating the vibration motor 30 at a high speed is described in detail in Patent Document 1, and therefore the description thereof is omitted.
次に、図４に従来の他の振動モータの平面図（ａ）とＤ−Ｄ断面図（ｂ）を示す。図３に示す従来の振動モータ３０と異なる点は、２極の扁平ステータ４１のロータ穴４１ａであって、ディテントトルクを発生するために前記ロータ穴３１ａに設けられた段差３１ｃと３１ｄに変わってノッチ４１ｃと４１ｄが設けられている。それ以外の構造は同一なので説明を省略する。 Next, FIG. 4 shows a plan view (a) and a DD sectional view (b) of another conventional vibration motor. The difference from the conventional vibration motor 30 shown in FIG. 3 is the rotor hole 41a of the two-pole flat stator 41, which changes to steps 31c and 31d provided in the rotor hole 31a to generate detent torque. Notches 41c and 41d are provided. Since other structures are the same, description thereof is omitted.
さらに、図５に従来の他の振動モータの平面図（ａ）とＥ−Ｅ断面図（ｂ）を示す。従来の振動モータ５０は、図３に示す従来の振動モータ３０と同様に矩形の外形を有し、それと異なる点は、平板形状の偏心重り５５であって、それは駆動コイル５３とハウジング５８の間に配置されており、その半径は前記振動モータ３０の偏心重り３５の半径より２倍ほど大きく、その厚みは１／４ほどに薄く、回転時に偏心重り５５に働く遠心力はその半径の３乗に、また、その厚みの1乗に比例することから、回転数が同じでは、振動モータ５０では、遠心力、言い換えれば、振動力が２倍ほど大きくなるが、一方、厚みは若干薄くなるが平面サイズは大きくなってしまっている。それ以外の構造は同一なので説明を省略する。 Further, FIG. 5 shows a plan view (a) and an EE cross-sectional view (b) of another conventional vibration motor. The conventional vibration motor 50 has a rectangular outer shape similar to the conventional vibration motor 30 shown in FIG. 3, and is different from that in a flat plate-shaped eccentric weight 55 between the drive coil 53 and the housing 58. The radius is about twice as large as the radius of the eccentric weight 35 of the vibration motor 30, the thickness is about 1/4, and the centrifugal force acting on the eccentric weight 55 during rotation is the cube of the radius. In addition, since it is proportional to the first power of the thickness, the centrifugal motor, in other words, the vibration force becomes twice as large in the vibration motor 50 at the same rotation speed, whereas the thickness is slightly reduced. The plane size has become larger. Since other structures are the same, description thereof is omitted.
また、さらに、図６に従来の他の振動モータの平面図（ａ）とＦ−Ｆ断面図（ｂ）を示す。図５に示す従来の他の振動モータ５０と異なる点は、２極の扁平ステータ６１のロータ穴６１ａであって、ディテントトルクを発生するために前記ロータ穴５１ａに設けられた段差５１ｃと５１ｄに変わってノッチ６１ｃと６１ｄが設けられている。それ以外の構造は同一なので説明を省略する。 Further, FIG. 6 shows a plan view (a) and a cross-sectional view FF of another conventional vibration motor (b). A different point from the other conventional vibration motor 50 shown in FIG. 5 is a rotor hole 61a of a flat stator 61 having two poles, and steps 51c and 51d provided in the rotor hole 51a to generate detent torque. Instead, notches 61c and 61d are provided. Since other structures are the same, description thereof is omitted.
しかしながら、図３に示す従来の振動モータ３０、あるいは図４に示す従来の他の振動モータ４０では、偏心重り３５あるいは偏心重り４５の半径をこれ以上大きくできないので、振動力が大きくならないという問題があった。そこで、振動力を大きくしようとすると、その厚みを厚くしなければならないので、振動モータ３０あるいは振動モータ４０の厚みが厚くなってしまうという問題が発生した。また、図５に示す従来の他の振動モータ５０、あるいは図６に示す従来の他の振動モータ６０では、おおむね振動力は出せるが、平面図（ａ）において形状が矩形の駆動コイル５３あるいは駆動コイル６３の両端が邪魔になって、振動モータ５０あるいは振動モータ６０の外形を矩形からコイン型にはできないので、コイン型への要求には応えられないという問題があった。また、振動力をさらにアップするには、偏心重り５５あるいは偏心重り６５の外周部を肉厚にすればよいが、そうすると、回転時に駆動コイル５３あるいは駆動コイル６３と干渉してしまうので、振動力のアップへの要求には応えられないという問題もあった。 However, in the conventional vibration motor 30 shown in FIG. 3 or another conventional vibration motor 40 shown in FIG. 4, the radius of the eccentric weight 35 or the eccentric weight 45 cannot be increased any more, so that the vibration force does not increase. there were. Thus, when the vibration force is increased, the thickness of the vibration motor 30 or the vibration motor 40 is increased because the thickness of the vibration motor 30 or the vibration motor 40 is increased. Further, the other conventional vibration motor 50 shown in FIG. 5 or the other conventional vibration motor 60 shown in FIG. 6 can generally generate a vibration force, but in the plan view (a), the shape of the drive coil 53 or drive is rectangular. Since both ends of the coil 63 get in the way and the outer shape of the vibration motor 50 or the vibration motor 60 cannot be changed from a rectangle to a coin type, there is a problem that the demand for the coin type cannot be met. Further, in order to further increase the vibration force, the outer peripheral portion of the eccentric weight 55 or the eccentric weight 65 may be thickened. However, this causes interference with the drive coil 53 or the drive coil 63 during rotation. There was also a problem that it was not possible to meet the demands for the improvement.
２極の扁平ステータと、該２極の扁平ステータとギャップを介して磁気結合しディテントトルクによって静止する、ロータ軸に固定された２極の永久磁石から成るロータと、駆動コイルから構成されるステップモータにおいて、前記駆動コイルは、コイル巻心を有して前記２極の扁平ステータと磁気結合する、少なくとも１個の第１の駆動コイルと、該２極の扁平ステータに設けられたコイル巻心部にマグネットワイヤーを巻回して形成された、少なくとも１個の第２の駆動コイルからなる。 A step composed of a two-pole flat stator, a rotor composed of a two-pole permanent magnet fixed to the rotor shaft, which is magnetically coupled to the two-pole flat stator via a gap and stationary by detent torque, and a drive coil In the motor, the drive coil has a coil core and is magnetically coupled to the two-pole flat stator, and at least one first drive coil, and a coil core provided on the two-pole flat stator. It consists of at least one second drive coil formed by winding a magnet wire around the part.
前記第１の駆動コイルと第２の駆動コイルはそれぞれ２個の駆動コイルからなり、前記ステップモータの磁気回路において、前記第１の駆動コイルの２個の駆動コイルの起磁力は並列に接続し、その合成起磁力は前記第２の駆動コイルの２個の駆動コイルの起磁力と直列に接続し、前記永久磁石の起磁力に働く。 Each of the first drive coil and the second drive coil comprises two drive coils. In the magnetic circuit of the step motor, the magnetomotive forces of the two drive coils of the first drive coil are connected in parallel. The combined magnetomotive force is connected in series with the magnetomotive forces of the two drive coils of the second drive coil, and acts on the magnetomotive force of the permanent magnet.
前記第１の駆動コイルはお互いに前記ロータを挟んでそのロータの中心を通る線分に対して線対称になるように配置され、該第２の駆動コイルはお互いに前記ロータを挟んで前記コイル巻心部のそれぞれに配置され、前記第１の駆動コイルの２個の駆動コイルのコイル巻数は同一で、該第１の駆動コイルと前記第２の駆動コイルの４個の駆動コイルのコイルは直列に接続されて１つのコイルを形成している。 The first drive coils are arranged so as to be line-symmetric with respect to a line segment passing through the center of the rotor with the rotor sandwiched therebetween, and the second drive coils sandwich the rotor with each other. The number of coil turns of the two drive coils of the first drive coil is the same as that of the four drive coils of the first drive coil and the second drive coil. They are connected in series to form one coil.
前記ステップモータは、前記ロータのロータ軸に固定された回転オモリの外周部の最肉厚部が前記駆動コイルと厚み方向で重ならない構造の振動モータである。 The step motor is a vibration motor having a structure in which the thickest portion of the outer peripheral portion of the rotating weight fixed to the rotor shaft of the rotor does not overlap the drive coil in the thickness direction.
前記ステップモータは、前記ロータのロータ軸に固定されたファンが前記駆動コイルと厚み方向で重ならない構造のファンモータである。 The step motor is a fan motor having a structure in which a fan fixed to a rotor shaft of the rotor does not overlap with the drive coil in the thickness direction.
小型でコイン型の外形を有しながら、振動力も出せる振動モータを提供できる効果がある。また、ファンモータにも本発明の技術を適用して、小型のファンモータを提供できる効果がある。 There is an effect that it is possible to provide a vibration motor that can generate vibration force while having a small and coin-shaped outer shape. In addition, the present invention can be applied to the fan motor to provide a small fan motor.
以下、本発明の実施の形態を図面に基づいて詳述する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
図１に本発明の第１の振動モータの平面図（ａ）とＡ−Ａ断面図（ｂ）を示す。本発明の振動モータ１０は、コイン型の外形を有し、２極の扁平ステータ１１と、該扁平ステータ１１に設けられたロータ穴１１ａに配置され、該扁平ステータ１１とギャップ１１ｂを介して磁気結合し、ロータ穴１１ａに設けられた段差３１ｃと３１ｄによって発生するディテントトルクによって静止する、ロータ軸１２ｂに固定された永久磁石１２ａから成り、ハウジング１８と基板１７で支持されたロータ１２と、該扁平ステータ１１に設けられたコイル巻心部１４１ｂに巻き回されたコイル１４１ａとから成る駆動コイル１４１と、前記ロータ１２を挟んで配置された、該扁平ステータ１１に設けられたコイル巻心部１４２ｂに巻き回されたコイル１４２ａとから成る駆動コイル１４２と、該扁平ステータ１１に磁気結合する、コイル巻心１３１ｂに巻き回されたコイル１３１ａとから成る駆動コイル１３１と、前記ロータ１２を挟んでそのロータ１２の中心を通る線分Ｘ１−Ｘ１に対して、駆動コイル１３１と線対称になるように配置された、コイル巻心１３２ｂに巻き回されたコイル１３２ａとから成る駆動コイル１３２から構成され、ロータ軸１２ｂには偏心重り１５が取り付けられ、その肉厚部１５ａは断面図（ｂ）に示すようにコイル１３１あるいは１３２に重ならないように配置されている。 FIG. 1 shows a plan view (a) and a cross-sectional view AA of a first vibration motor of the present invention. The vibration motor 10 of the present invention has a coin-shaped outer shape, and is disposed in a two-pole flat stator 11 and a rotor hole 11a provided in the flat stator 11, and magnetically passes through the flat stator 11 and a gap 11b. The rotor 12 is composed of a permanent magnet 12a fixed to the rotor shaft 12b and supported by the housing 18 and the substrate 17, and is fixed by the detent torque generated by the steps 31c and 31d provided in the rotor hole 11a. A drive coil 141 comprising a coil 141a wound around a coil core portion 141b provided on the flat stator 11 and a coil core portion 142b provided on the flat stator 11 disposed with the rotor 12 interposed therebetween. A drive coil 142 comprising a coil 142 a wound around the coil stator and a coil that is magnetically coupled to the flat stator 11. A drive coil 131 composed of a coil 131a wound around a winding core 131b and a line segment X1-X1 passing through the center of the rotor 12 across the rotor 12 so as to be symmetrical with the drive coil 131. The drive coil 132 is composed of a coil 132a wound around a coil winding core 132b. An eccentric weight 15 is attached to the rotor shaft 12b, and a thick portion 15a is shown in a sectional view (b). Thus, they are arranged so as not to overlap the coils 131 or 132.
なお、前記駆動コイル１３１と１３２はコの字型の別体となっているが、一体のリング型の駆動コイルに形成することもでき、さらに、扁平ステータ１１に駆動コイル１３１、１３２、１４１、１４２を一体に形成することも可能である。 The drive coils 131 and 132 are U-shaped separate bodies. However, the drive coils 131 and 132 can be formed as an integral ring-type drive coil. Further, the drive coils 131, 132, 141, It is also possible to form 142 integrally.
前記第１の駆動コイルの２個の駆動コイル１３１と１３２のコイル１３１ａと１３２ａのコイル巻数は同一で、該第１の駆動コイルと前記第２の駆動コイルの４個の駆動コイル１３１、１３２、１４１、１４２のコイル１３１ａ、１３２ａ、１４１ａ、１４２ａは直列に接続されて１つのコイルを形成している。 The two drive coils 131 and 132 of the first drive coil have the same number of coil turns of the coils 131a and 132a, and the four drive coils 131 and 132 of the first drive coil and the second drive coil, The coils 131a, 132a, 141a, 142a of 141, 142 are connected in series to form one coil.
該振動モータ１０は、電源のみの外部端子（図示せず）を持つ１チップに集積化されたドライバＩＣ１６に電源を印加すると、前記コイル１３１ａ、１３２ａ、１４１ａ、１４２ａには同一の駆動電流が印加され、図１０に示す従来のステップモータの磁気回路とは異なり、図９の本発明のステップモータの磁気回路に示すように、図１に示すコイル１３１ａ、１３２ａ、１４１ａ、１４２ａに同一の駆動電流ｉが印加された時、駆動コイル１３１の起磁力ｎ１ｉ、９１ａ（ｎ１はコイル１３１ａの巻数）と駆動コイル１３２の起磁力ｎ１ｉ、９１ｂ（ｎ１はコイル１３２ａの巻数）の並列な合成起磁力は、駆動コイル１４１の起磁力ｎ２ｉ、９２ａと、駆動コイル１４２の起磁力ｎ２ｉ、９２ｂと直列に、主にギャップ１１ｂの磁気抵抗Ｒｇ９４ａと９４ｂを通して永久磁石１２ａの起磁力Ｍｍ９３に働き、ロータ１２は高速に回転し、該偏心重り１５に遠心力が働いて振動を発生し振動モータとして機能する。なお、該振動モータ１０を高速回転させる駆動方法は特許文献１に詳しく説明されているのでその説明は省略する。 The vibration motor 10 applies the same drive current to the coils 131a, 132a, 141a, and 142a when the power is applied to the driver IC 16 integrated on one chip having an external terminal (not shown) having only a power supply. Unlike the conventional step motor magnetic circuit shown in FIG. 10, the same drive current is applied to the coils 131a, 132a, 141a, 142a shown in FIG. 1, as shown in the step motor magnetic circuit of FIG. When i is applied, the resultant magnetomotive force n1i, 91a (n1 is the number of turns of the coil 131a) of the drive coil 131 and the magnetomotive force n1i, 91b (n1 is the number of turns of the coil 132a) of the drive coil 132 are parallel. The magnetoresistance R of the gap 11b is mainly in series with the magnetomotive forces n2i and 92a of the drive coil 141 and the magnetomotive forces n2i and 92b of the drive coil 142. Work through 94a and 94b to the magnetomotive force Mm93 of the permanent magnet 12a, a rotor 12 is rotated at high speed, working centrifugal force generates a vibration acts as a vibration motor eccentric weight 15. Note that a driving method for rotating the vibration motor 10 at a high speed is described in detail in Japanese Patent Application Laid-Open No. 2004-133830, and thus the description thereof is omitted.
ここで、本発明の第１の振動モータ１０と従来の振動モータ３０の振動力をそれぞれの永久磁石１２ａと３２ａ、また、それぞれの扁平ヨーク１１と３１のロータ穴１１ａと３１ａが同一である時に比較してみる。 Here, when the vibration forces of the first vibration motor 10 of the present invention and the conventional vibration motor 30 are the same in the permanent magnets 12a and 32a and the rotor holes 11a and 31a in the flat yokes 11 and 31, respectively. Let's compare.
まず、駆動コイルの起磁力を決めるコイル巻数と駆動電流のうちでコイル巻数では、コイル１３１ａ、１３２ａ、１４１ａ、１４２ａに同一の駆動電流が印加された時コイル１３１ａの起磁力と１３２ａの起磁力の並列な合成起磁力がコイル１４１ａの起磁力、１４２ａの起磁力と直列に合成して永久磁石１２ａに働くことを考慮して、図１において、コイル１３１ａと１４１ａと１４２ａのコイル巻数の総数あるいは、コイル１３２ａと１４１ａと１４２ａのコイル巻数の総数は駆動コイル３３のコイル３３ａのコイル巻数と同一なっている。 First, out of the number of coil turns and the drive current that determine the magnetomotive force of the drive coil, the number of coil turns is determined by the magnetomotive force of the coil 131a and the magnetomotive force of the 132a when the same drive current is applied to the coils 131a, 132a, 141a, 142a. Considering that the combined magnetomotive force in parallel is combined in series with the magnetomotive force of the coil 141a and the magnetomotive force of the 142a and acts on the permanent magnet 12a, in FIG. 1, the total number of coil turns of the coils 131a, 141a, and 142a, or The total number of coil turns of the coils 132a, 141a, and 142a is the same as the number of coil turns of the coil 33a of the drive coil 33.
次に、駆動電流を決めるコイル抵抗について説明する。振動モータ１０では振動モータ３０の駆動コイル３３に相当して駆動コイル１３１、１３２、１４１、１４２に分割されている。永久磁石１２ａからの磁束が駆動コイル１４１と１４２と通って駆動コイル１３１と１３２に２分されるので、そのコイル巻心１３１ｂと１３２ｂの断面積は振動モータ３０の駆動コイル３３のコイル巻心３３ｂの断面積の１／２にできるので、図１に示す平面図（ａ）においてコイル巻心１３１ｂと１３２ｂの幅はコイル巻心３３ｂの幅の１／２にでき、コイル１３１ａ、１３２ａ、１４１ａ、１４２ａの直列接続のコイルのコイル抵抗は駆動コイル３３のコイルのコイル抵抗の１５％程度増加にとどまるが、振動モータ１０では、同一の電圧印加で駆動電流は１５％程度減少し、回転数は駆動トルクの１５％程度の減少に伴って減少し、振動力は減小する。そこで、回転オモリ１５に働く遠心力がその片重り量と回転数の２乗に比例することを考慮して、回転オモリ１５の肉厚部１５ａの厚みを厚くし回転オモリ１５の片重り量を増やすことで振動力を同程度まで大きくしている。 Next, the coil resistance that determines the drive current will be described. The vibration motor 10 is divided into drive coils 131, 132, 141, 142 corresponding to the drive coil 33 of the vibration motor 30. Since the magnetic flux from the permanent magnet 12a passes through the drive coils 141 and 142 and is divided into two by the drive coils 131 and 132, the cross-sectional area of the coil cores 131b and 132b is the coil core 33b of the drive coil 33 of the vibration motor 30. 1, the width of the coil cores 131b and 132b in the plan view (a) shown in FIG. 1 can be ½ of the width of the coil core 33b, and the coils 131a, 132a, 141a, The coil resistance of the 142a series connection coil is only increased by about 15% of the coil resistance of the drive coil 33. However, in the vibration motor 10, the drive current decreases by about 15% when the same voltage is applied, and the rotational speed is driven. As the torque decreases by about 15%, the vibration force decreases. Therefore, considering that the centrifugal force acting on the rotating weight 15 is proportional to the amount of the single weight and the square of the number of rotations, the thickness of the thick portion 15a of the rotating weight 15 is increased so that the amount of the weight of the rotating weight 15 is reduced. Increasing the vibration force to the same extent.
次に、図２に本発明の第２の振動モータの平面図（ａ）とＢ−Ｂ断面図（ｂ）を示す。本発明の第２の振動モータ２０は、図１に示す本発明の第１の振動モータ１０と同様にコイン型の外形を有し、それと異なる点は、２極の扁平ステータ２１のロータ穴２１ａであって、ディテントトルクを発生するために前記ロータ穴１１ａに設けられた段差１１ｃと１１ｄに変わってノッチ２１ｃと２１ｄが設けられている。それ以外の構造は同一なので説明を省略する。 Next, FIG. 2 shows a plan view (a) and a BB sectional view (b) of the second vibration motor of the present invention. The second vibration motor 20 of the present invention has a coin-shaped outer shape as in the case of the first vibration motor 10 of the present invention shown in FIG. 1, and is different from that in the rotor hole 21a of the two-pole flat stator 21. In order to generate detent torque, notches 21c and 21d are provided in place of the steps 11c and 11d provided in the rotor hole 11a. Since other structures are the same, description thereof is omitted.
図７に本発明の第１のファンモータの平面図（ａ）とＧ−Ｇ断面図（ｂ）を示す。本発明のファンモータ７０は、２極の扁平ステータ７１と、該扁平ステータ７１に設けられたロータ穴７１ａに配置され、該扁平ステータ７１とギャップ７１ｂを介して磁気結合し、ロータ穴７１ａに設けられた段差７１ｃと７１ｄによって発生するディテントトルクによって静止する、ロータ軸７２ｂに固定された永久磁石７２ａから成り、ベアリング軸受７９ａと７９ｂで支持されたロータ７２と、該扁平ステータ７１のコイル巻心部７４１ｂに巻き回されたコイル７4１ａとから成る駆動コイル７４１と、前記ロータ７２を挟んで配置された、該扁平ステータ７１のコイル巻心部７４２ｂに巻き回されたコイル７4２ａとから成る駆動コイル７４２と、該扁平ステータ７１に磁気結合する、コイル巻心７３１ｂに巻き回されたコイル７３１ａとから成る駆動コイル７３１と、前記ロータ７２を挟んでそのロータ７２の中心を通る線分Ｙ１−Ｙ１に対して、駆動コイル７３１に線対称になるように配置された、コイル巻心７３２ｂに巻き回されたコイル７３２ａとから成る駆動コイル７３２から構成され、ロータ軸７２ｂにはファン体７５が取り付けられ、そのファン７５ａはコイル７３１あるいは７３２に重ならないように配置されている。 FIG. 7 shows a plan view (a) and a GG sectional view (b) of the first fan motor of the present invention. The fan motor 70 of the present invention is disposed in a two-pole flat stator 71 and a rotor hole 71a provided in the flat stator 71, and is magnetically coupled to the flat stator 71 via a gap 71b to be provided in the rotor hole 71a. A rotor 72 supported by bearing bearings 79a and 79b, which is stationary by a detent torque generated by the stepped portions 71c and 71d and which is fixed to the rotor shaft 72b, and a coil core portion of the flat stator 71 A drive coil 742 composed of a coil 741a wound around 741b and a coil 742a wound around the coil core portion 742b of the flat stator 71 disposed with the rotor 72 interposed therebetween; The coil 73 wound around the coil winding core 731b is magnetically coupled to the flat stator 71. A coil winding core 732b arranged symmetrically to the driving coil 731 with respect to a driving coil 731 consisting of a and a line segment Y1-Y1 passing through the center of the rotor 72 across the rotor 72. The fan body 75 is attached to the rotor shaft 72b, and the fan 75a is disposed so as not to overlap the coil 731 or 732.
前記ファン７５ａは軸流ファンであるが、径流ファンにすることもできる。また、前記ベアリング軸受７９ａと７９ｂは動圧軸受にすることも可能である。 The fan 75a is an axial fan, but may be a radial fan. The bearings 79a and 79b can be dynamic pressure bearings.
次に、図８に本発明の第２のファンモータの平面図（ａ）とＨ−Ｈ断面図（ｂ）を示す。図７に示す本発明の第１の振動モータ７０と異なる点は、２極の扁平ステータ８１のロータ穴８１ａであって、ディテントトルクを発生するために前記ロータ穴７１ａに設けられた段差７１ｃと７１ｄに変わってノッチ８１ｃと８１ｄが設けられている。それ以外の構造は同一なので説明を省略する。 Next, FIG. 8 shows a plan view (a) and a HH sectional view (b) of the second fan motor of the present invention. 7 differs from the first vibration motor 70 of the present invention shown in FIG. 7 in a rotor hole 81a of a two-pole flat stator 81, which is different from a step 71c provided in the rotor hole 71a to generate detent torque. Instead of 71d, notches 81c and 81d are provided. Since other structures are the same, description thereof is omitted.
以上の詳細な説明により示されたように、本発明によれば、従来の振動モータの振動力と同程度に維持しながら、矩形の外形を有する従来の振動モータに比べて小型でコイン型の外形を有する振動モータを提供でき（例えば、矩形の外形とコイン型の外形のそれぞれの辺の長さと径の長さが等しい場合には、コイン型の外形では平面の面積は約７２%と小さくなる）、該振動モータが搭載される携帯電話等の携帯電子機器を小型化できる効果がある。また、同様なステッピングモータに回転オモリに変えてファン体を回転軸に取り付けることにより小型のファンモータを提供でき、同様に、該ファンモータが搭載される携帯電話等の携帯電子機器を小型化できる効果がある。 As indicated by the detailed description above, according to the present invention, while maintaining the same level as the vibration force of the conventional vibration motor, it is smaller and more coin-shaped than the conventional vibration motor having a rectangular outer shape. A vibration motor having an outer shape can be provided (for example, when the length of each side and the length of the diameter of a rectangular outer shape and a coin-shaped outer shape are equal, the plane area of the coin-shaped outer shape is as small as about 72%. There is an effect that a portable electronic device such as a mobile phone on which the vibration motor is mounted can be downsized. In addition, a small fan motor can be provided by replacing the same stepping motor with a rotating weight instead of a rotating weight, and a portable electronic device such as a mobile phone on which the fan motor is mounted can be miniaturized. effective.
１０ ２０ ３０ ４０ ５０ ６０ 振動モータ
７０ ８０ ファンモータ
１１ ２１ ３１ ４１ ５１ ６１ ７１ ８１ 扁平ステータ
１２ ２２ ３２ ４２ ５２ ６２ ７２ ８２ ロータ
１３１ １３２ ２３１ ２３２ ７３１ ７３２ ８３１ ８３２
第１の駆動コイル
１３１ａ １３２ａ ２３１ａ ２３２ａ ７３１ａ ７３２ａ ８３１ａ
８３２ａ コイル
１４１ １４２ ２４１ ２４２ ７４１ ７４２ ８４１ ８４２
第２の駆動コイル
１４１ａ １４２ａ ２４１ａ ２４２ａ ７４１ａ ７４２ａ ８４１ａ
８４２ａ コイル
３３ ４３ ５３ ６３ 駆動コイル
１５ ２５ ３５ ４５ ５５ ６５ 回転オモリ
１５ａ ２５ａ 回転オモリの肉厚部
７５ ８５ ファン体
７５ａ ８５ａ ファン
９１ａ、９１ｂ、９２ａ、９２ｂ、１０１ 駆動コイルの起磁力
９３、１０２ 永久磁石の起磁力
９４ａ、９４ｂ、１０３ａ、１０３ｂ 磁気抵抗
10 20 30 40 50 60 Vibration motor 70 80 Fan motor 11 21 31 41 51 61 71 81 Flat stator 12 22 32 42 52 62 72 82 Rotor 131 132 231 232 731 732 831 832
First drive coil 131a 132a 231a 232a 731a 732a 831a
832a Coil 141 142 241 242 741 742 841 842
Second drive coil 141a 142a 241a 242a 741a 742a 841a
842a Coil 33 43 53 63 Drive coil 15 25 35 45 55 65 Rotating weight 15a 25a Thick part 75 of rotating weight 85 Fan body 75a 85a Fans 91a, 91b, 92a, 92b, 101 Magnetomotive force 93, 102 Permanent magnet of driving coil Magnetomotive force of 94a, 94b, 103a, 103b
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005290602A JP4251457B2 (en) | 2005-10-04 | 2005-10-04 | Step motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005290602A JP4251457B2 (en) | 2005-10-04 | 2005-10-04 | Step motor |
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| Publication Number | Publication Date |
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| JP2007104796A true JP2007104796A (en) | 2007-04-19 |
| JP4251457B2 JP4251457B2 (en) | 2009-04-08 |
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| JP2005290602A Expired - Fee Related JP4251457B2 (en) | 2005-10-04 | 2005-10-04 | Step motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2172252A3 (en) * | 2008-10-03 | 2010-12-22 | Nintendo Co., Ltd. | Hand-held information processing apparatus |
| US8125174B2 (en) | 2006-08-07 | 2012-02-28 | Norio Miyauchi | Motor driven electronic apparatus |
-
2005
- 2005-10-04 JP JP2005290602A patent/JP4251457B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8125174B2 (en) | 2006-08-07 | 2012-02-28 | Norio Miyauchi | Motor driven electronic apparatus |
| EP2172252A3 (en) * | 2008-10-03 | 2010-12-22 | Nintendo Co., Ltd. | Hand-held information processing apparatus |
| US8081428B2 (en) | 2008-10-03 | 2011-12-20 | Nintendo Co., Ltd. | Hand-held information processing apparatus |
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|---|---|
| JP4251457B2 (en) | 2009-04-08 |
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