JP2005065378A - Rotor for coreless motor, method for manufacturing the same and axial air-gap type coreless motor having the same - Google Patents

Rotor for coreless motor, method for manufacturing the same and axial air-gap type coreless motor having the same Download PDF

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JP2005065378A
JP2005065378A JP2003290146A JP2003290146A JP2005065378A JP 2005065378 A JP2005065378 A JP 2005065378A JP 2003290146 A JP2003290146 A JP 2003290146A JP 2003290146 A JP2003290146 A JP 2003290146A JP 2005065378 A JP2005065378 A JP 2005065378A
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armature coil
core armature
air
rotor
wiring board
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JP3530182B1 (en
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Kentaro Fujii
藤井健太郎
Masahiro Takagi
正弘 高城
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Tokyo Parts Ind Co Ltd
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Tokyo Parts Ind Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a thin axial air-gap type motor which obtains a rotor that a problem, such as a short-circuit and a disconnection, does not occur with a simple configuration, as a connection can be performed easily even if it is an air core armature coil having a small inside diameter. <P>SOLUTION: The air-gap type coreless motor includes a printed wiring board 1 having regions 1h, 1n in which parts of a plurality of winding type air core armature coils which should be laid in a first surface as plainly seen, and parts 1c, 1d of outer diameters are formed so that inside diameter of the winding type air core armature coil may be applied mostly on the exterior of this regions at outside arc part. A land 1r for a first terminal wire connection is formed here, and a land 1t for a second terminal wire connection is formed between the respective regions. The beginning terminal 2a of the winding type air core armature coil 2 laid in the respective regions is connected to the land for the first terminal wire connection, and the winding end terminal is connected to the second terminal wire connection land and integrated with a resin 3 to the printed wiring board so cover the outer periphery of the winding type air core armature coil. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

この発明は、移動体通信装置の無音報知手段などに用いて好適なものでコアレスモータ用ロータと同ロータの製法及び同ロータを備えた軸方向空隙型コアレスモータに関する。   The present invention relates to a rotor for a coreless motor, a method for producing the same, and an axial gap type coreless motor equipped with the rotor.

モータ用ロータ、特に移動体通信装置の無音報知手段等に用いられる薄型な軸方向空隙型モータに使用するロータは、コアレス型で０．８ｍｍ以下の極めて薄いものとなり、落下などの衝撃に耐えられるように電機子自体を樹脂で一体成形したもの、すなわち、空心電機子コイルを印刷配線板と共に樹脂で一体成形することによって強度を得るようにしたものが多用される。
しかも、コアレスロータとして小型なものほど、空隙ロスを避けねばならず、可及的に電機子コイルの一面は樹脂で覆うことなく露出されるようになっている。（特許文献１参照）
このようなロータとしては、電機子コイル自体も小型になるので、通常、巻始め端末は該コイルの内径では結線させることが困難であってコイル辺と鎖交するように印刷配線板の間から導出せざるを得なくなる。（特許文献２参照）
しかしながら、電機子コイルの一面を露出させるように射出金型で押さえる場合、巻始め端末がコイル辺に押し潰され、ショート、断線などの問題が発生する。 Rotors used in motor rotors, particularly thin axial gap type motors used for silence notification means of mobile communication devices, etc., are coreless and extremely thin with a thickness of 0.8 mm or less, and can withstand impacts such as dropping. As described above, the one in which the armature itself is integrally molded with resin, that is, the one in which the strength is obtained by integrally molding the air-core armature coil with the printed wiring board together with the resin is often used.
Moreover, the smaller the coreless rotor, the more the gap loss must be avoided, and as much as possible, one surface of the armature coil is exposed without being covered with resin. (See Patent Document 1)
As such a rotor, the armature coil itself is also small, so it is usually difficult to connect the winding start terminal at the inner diameter of the coil, and it is led out from the printed wiring board so as to be linked to the coil side. It must be. (See Patent Document 2)
However, when pressing with an injection mold so that one surface of the armature coil is exposed, the winding start terminal is crushed by the coil side, causing problems such as short circuit and disconnection.

このようなコイル端末のショート、断線などの問題を防ぐ手段として、ロータでは、空心コイルを載置した金属製のフレームの該コイル辺の下方に設けた凹所に端末を通して該金属フレームに接続されたものがある。（特許文献３参照）
しかしながら、このものは、樹脂で成型するものでなく金属フレームがあるので薄型化は期待できない。
特許第３４０７８０３号公報 特許第３３９３８４７号公報（図４） 特開平９−３２２５０３号公報 As a means for preventing problems such as short circuit and disconnection of the coil terminal, the rotor is connected to the metal frame through the terminal in a recess provided below the coil side of the metal frame on which the air-core coil is mounted. There is something. (See Patent Document 3)
However, this product is not molded with resin and has a metal frame, so it cannot be expected to be thin.
Japanese Patent No. 3407803 Japanese Patent No. 3393847 (FIG. 4) JP-A-9-322503

また、このような振動モータは携帯電話機等の移動体通信装置に搭載される場合、サイズが極限まで薄く小型化が要求され、偏心ロータを構成する軸も０．６ｍｍ以下のものが採用せざるを得ないようになっているので、耐衝撃性に十分配慮しなくてはならない。   Further, when such a vibration motor is mounted on a mobile communication device such as a cellular phone, the size is extremely thin and the size reduction is required, and the shaft constituting the eccentric rotor must be 0.6 mm or less. Therefore, it is necessary to give sufficient consideration to impact resistance.

この発明の目的は、電機子コイルの巻始め端末を処理するに当たって、半田こてなどが入らないような小さな内径を有する空心電機子コイルであっても、内径部分に簡単な構成で容易に結線できるようにしてショート、断線などの問題がでないようにしたロータが得られ、このロータを組みあわせて軸方向空隙型モータの構成として極めて薄型なものを実現させるものである。   An object of the present invention is to easily connect an inner diameter portion with a simple configuration even in an air core armature coil having a small inner diameter so that a soldering iron or the like does not enter when processing the winding start terminal of the armature coil. Thus, a rotor in which there are no problems such as short circuit and disconnection can be obtained, and this rotor can be combined to realize an extremely thin configuration of the axial gap motor.

上記課題を解決するには請求項１に示すように、印刷配線板は第１の面に平面視で載置されるべき複数個の巻線型空心電機コイルの各有効導体部の半分以上を載置する領域があり、外径の一部がこの領域の外側で巻線型空心電機子コイルの内径の半分以上にかかるように形成され、この内径部分に第１の端末結線用ランドが形成されると共に、第２の端末結線ランドが前記各領域間に形成され、第２の面で回転中心と同心に複数個の整流子セグメントからなる整流子が配され、前記各領域に巻線型空心電機子コイルが載置されて巻始め端末が前記第１の端末結線用ランドに接続されると共に、巻き終わり端末が前記第２の端末結線ランドに接続され、該巻線型空心電機子コイルの外径を覆うもので達成できる。 具体的には、請求項２に示すように、前記巻線型空心電機子コイルは平面視で１７０度以下の配置開角で偏心して配され、前記外径の一部はほぼ前記巻線型空心電機子コイル内径の外側の辺のあたりを接線とする直線となっており、回転中心を介して前記各巻線型空心電機子コイルの反対側に配されたもので少なくとも軸方向の抜け止め手段が設けられた比重１５以上のタングステン合金製の偏心ウエイトが前記印刷配線板、前記巻線型空心電機子コイルと共に比重２以下の樹脂で一体化され、前記回転中心に備えられた１個の焼結含油軸受で軸支承されたものがよい。
別の具体的な解決手段は、請求項３に示すように、前記印刷配線板は偏心ウエイトの主要部分が配置される部分が欠除されて非円形となっているものにするのがよい。
さらに、このようなロータを製造するには、請求項４、５に示す発明のように、請求項１の印刷配線板を形成する工程と、この印刷配線板をジグに装着する工程と、空心電機子コイルを前記外径の一部の位置で前記ジグに立てて配置する工程と、この空心電機子コイルの巻始め端末を前記第１の端末結線用ランドに接続する工程と、その後、該空心電機子コイルを印刷配線板に寝かせて添設する工程と、該空心電機子コイルの巻き終わり端末を前記第２の端末結線用ランドに接続する工程と、これらを一体にモールドする工程とを備えたもので達成でき、モールド前に偏心ウエイトを一体化する工程を備えたものでもよい。 そして、請求項６に示すように、請求項１〜３のいずれか１項に記載のコアレスモータ用ロータと、このロータを格納するもので厚みがそれぞれ０．２ｍｍ以下で構成されたケースとブラケットからなるハウジングと、前記ロータは軸を介して前記ハウジングに回転自在に支承され、該軸の周囲で前記ブラケットに添設されたブラシベースはフレキシブル基板で接着層を含めた厚みが０．１８ｍｍ以下で構成され、さらに前記ブラケットにはマグネットが配される部分の一部を横切るように透孔が設けられ、この透孔を通って前記ブラシベースの一部がハウジング側方に給電電極として導出されているもので達成できる。 In order to solve the above-mentioned problem, as shown in claim 1, the printed wiring board is mounted on the first surface with more than half of each effective conductor portion of the plurality of wound type air core electric coils to be placed in plan view. And a part of the outer diameter is formed so as to cover more than half of the inner diameter of the wound air-core armature coil outside the area, and the first terminal connection land is formed in the inner diameter part. In addition, a second terminal connection land is formed between the regions, and a commutator including a plurality of commutator segments is arranged concentrically with the rotation center on the second surface, and the wound air-core armature is disposed in each region. A coil is placed and a winding start terminal is connected to the first terminal connection land, and a winding end terminal is connected to the second terminal connection land, and the outer diameter of the wound air-core armature coil is reduced. Can be achieved with a covering. Specifically, as shown in claim 2, the wound-type air-core armature coil is arranged eccentrically with an arrangement opening angle of 170 degrees or less in a plan view, and a part of the outer diameter is approximately the wound-type air-core electric machine. It is a straight line with a tangent line around the outer side of the inner diameter of the child coil, and is arranged on the opposite side of each of the winding type air-core armature coils via the center of rotation, and is provided with at least axial retaining means. An eccentric weight made of a tungsten alloy having a specific gravity of 15 or more is integrated with the printed wiring board and the wound air-core armature coil with a resin having a specific gravity of 2 or less, and is a single sintered oil-impregnated bearing provided at the center of rotation. A shaft-supported one is good.
As another specific solution means, as shown in claim 3, the printed wiring board is preferably non-circular by removing a portion where the main portion of the eccentric weight is disposed.
Further, in order to manufacture such a rotor, as in the inventions shown in claims 4 and 5, the step of forming the printed wiring board of claim 1, the step of mounting the printed wiring board on a jig, Placing the armature coil upright on the jig at a part of the outer diameter, connecting the winding start terminal of the air-core armature coil to the first terminal connection land, Laying the air core armature coil on a printed wiring board, attaching the winding end terminal of the air core armature coil to the second terminal connection land, and molding them integrally. It can be achieved with the one provided, and may be provided with a step of integrating the eccentric weight before molding. And as shown in Claim 6, the rotor for coreless motors of any one of Claims 1-3, and the case and bracket which comprised this rotor and the thickness was each 0.2 mm or less And the rotor is rotatably supported on the housing via a shaft, and the brush base attached to the bracket around the shaft is a flexible substrate having a thickness of 0.18 mm or less including an adhesive layer Furthermore, the bracket is provided with a through hole so as to cross a part of the part where the magnet is arranged, and a part of the brush base is led out to the side of the housing as a feeding electrode through the through hole. Can be achieved.

請求項１の発明によれば、空心電機子コイルは領域の外側に立てて巻始め端末を半田付した後、外径の一部を支点として寝かせて領域に接着すればよいので空心電機子コイルは内径が小なるものでも容易に内径に半田付などで接続できることになる。
したがって、端末の処理が断線やショートなどの問題がなく容易にでき、樹脂によって強度よく構成できる。
請求項２の発明によれば、銅線とタングステン合金製偏心ウエイトの重量差によってロータ自体で回転時遠心力が発生するので軸固定型振動モータにすることができる
請求項３の発明によれば、印刷配線板の厚み分だけ偏心ウエイトの重量が多く得られるので振動量が大にできる。
請求項４、５の発明によれば、半田こての入らないような内径の小さな空心電機子コイルであってもコイルを配置してから結線する製造方法ではないので容易に結線でき、空心電機子コイルの外径がばらついたものでも、外径を基準に載置できるので、弧の外径に回り込む樹脂の量が一定にできる。
請求項６の発明によれば、巻始め端末の処理の問題がクリアできるロータによって小型で、しかも、ブラシベースをハウジング側方に導出させるに当たってブラシベースの厚みが無視できることになり、極めて薄い軸方向空隙型コアレスモータが得られる。 According to the first aspect of the present invention, since the air-core armature coil stands on the outside of the region and solders the terminal at the beginning of winding, the air-core armature coil may be bonded to the region with a part of the outer diameter as a fulcrum. Even if the inner diameter is small, it can be easily connected to the inner diameter by soldering or the like.
Therefore, processing of the terminal can be easily performed without problems such as disconnection and short circuit, and can be configured with high strength by the resin.
According to the invention of claim 2, a centrifugal force is generated at the time of rotation in the rotor itself due to the weight difference between the copper wire and the tungsten alloy eccentric weight, so that the shaft-fixed vibration motor can be obtained. Since the weight of the eccentric weight is increased by the thickness of the printed wiring board, the amount of vibration can be increased.
According to the fourth and fifth aspects of the present invention, even an air core armature coil having a small inner diameter that does not contain a soldering iron is not a manufacturing method in which a coil is arranged and then connected, so that it can be easily connected. Even if the outer diameter of the child coil varies, it can be placed on the basis of the outer diameter, so that the amount of resin that wraps around the outer diameter of the arc can be made constant.
According to the sixth aspect of the present invention, the rotor that can clear the processing problem at the winding start terminal is small, and the thickness of the brush base can be neglected when the brush base is led out to the side of the housing. An air gap type coreless motor is obtained.

印刷配線板に一体に樹脂成形するロータであって巻線型空心電機子コイルの巻き始め端末を逆転の発想により端末結線の後、該空心電機子コイルを印刷配線板に載置する手段を採用して断線、ショートなどの問題が出ないようにした。   A rotor that is integrally molded with a printed wiring board using a means for placing the air-core armature coil on the printed wiring board after the terminal connection of the winding-type air-core armature coil with the idea of reverse rotation. To avoid problems such as disconnection and short circuit.

図１は、本発明のコアレスモータ用ロータとして振動発生用に応用した場合の平面図である。（実施例１）
図２は、図１の印刷配線板の第２面側の平面図である。
図３は、図１の巻線型空心電機子コイルの巻き始め端末処理の製造方法を説明するもので図１をＡ−Ａ線で切断した場合の要部断面図である。
図４は、図１のロータを格納した軸固定型の軸方向空隙型コアレス振動モータの縦断面図である。（実施例２）
図５は、本発明のコアレスモータ用ロータを通常回転型に応用した場合の平面図である。（実施例３） FIG. 1 is a plan view of the coreless motor rotor according to the present invention when applied for generating vibrations. (Example 1)
FIG. 2 is a plan view of the second surface side of the printed wiring board of FIG.
FIG. 3 is a cross-sectional view of a main part when FIG. 1 is cut along the line AA, illustrating a method for manufacturing a winding start terminal treatment of the wound air-core armature coil of FIG.
FIG. 4 is a longitudinal sectional view of a shaft-fixed axial gap type coreless vibration motor storing the rotor of FIG. (Example 2)
FIG. 5 is a plan view when the coreless motor rotor of the present invention is applied to a normal rotary type. (Example 3)

図１、図２において、印刷配線板１は第１の面１ａに平面視で複数個の巻線型空心電機コイルの各有効導体部の半分以上を１６０度程度の開角で載置できるように形成した領域１ｈ、１ｎがあり、外径の一部１ｃ、１ｄがこの領域の外側で巻線型空心電機子コイルの内径の半分以上で、ほぼ前記巻線型空心電機子コイル内径の半径方向外側の円弧のあたりを接線とする直線に形成され、この内径部分に第１の端末結線用ランド１ｒが形成されると共に、第２の端末結線ランド１ｔが前記各領域間に形成される。
この印刷配線板１の第２の面１ｂでは、回転中心と同心に複数個の整流子セグメントからなる整流子１Ｓが印刷形成され、表面が金メッキされて接触性を良好に保ち、前記各領域に巻線型空心電機子コイル２Ａ、２Ｂが載置されて巻始め端末２ａ、２ｂが前記第１の端末結線用ランド１ｒに接続されると共に、巻き終わり端末が前記第２の端末結線ランド１ｔに接続され、該巻線型空心電機子コイルの外径を覆うように前記印刷配線板１に樹脂３で一体化されるようになっている。
ここで、前記巻線型空心電機子コイル２Ａ、２Ｂの巻始め端末２ａ、２ｂが前記第１の端末結線用ランドに接続手段としては、図３に示すようなジグを利用する。すなわち、ジグＪは、前記印刷配線板１が載置される平坦部分Ｊａと、この印刷配線板１の直線で形成された外径の一部１ｃ、１ｄのところが各空心電機子コイル２Ａ、２Ｂの外側の無効導体部分の形状に合わせて彫り込まれた凹所Ｊｂが形成されたもので、このジグＪを使用するには、この凹所Ｊｂに前記各空心電機子コイル２Ａ、２Ｂを立てて収め、巻始め端末２ａ、２ｂを前記第１の端末結線用ランド１ｒに半田付し、その後、前記外径の一部１ｃ、１ｄを支点として該各空心電機子コイル２Ａ、２Ｂを９０度回転して想像線で示すように前記領域１ｈ、１ｎに寝かせて接着するようにすればよい。もし該コイルの外径がかなりばらつくなら、接着剤が硬化する前に、さらに、必要に応じて抜け止めピンＪｄで支持された可動部材Ｊｃをスライドさせて該コイル２２の外形を合わせるようにして載置する位置を一定にすることもできる。
このようにすれば、内径の小さい空心電機子コイルでも無理に半田こてを入れなくて済むので、巻始め端末の結線処理が容易にでき、空心電機子コイルはサイズがばらついても外径の位置が一定になるので、樹脂成形時に該コイルの外径に回り込む樹脂の量が一定にできる。
その後巻き終わり端末が前記第２の端末結線ランド１ｔに半田接続されるが、この部分は、巻線型空心電機子コイル２Ａ、２Ｂはオーバーラップしないように離れているので、半田こてによる半田付は容易にできる。 1 and 2, the printed wiring board 1 can be placed on the first surface 1a so that more than half of each of the effective conductor portions of the plurality of wound type air core coils can be mounted at an open angle of about 160 degrees in plan view. There are formed regions 1h and 1n, and the outer diameter portions 1c and 1d are more than half of the inner diameter of the wound-type air-core armature coil outside the region, and substantially outside the inner diameter of the wound-type air-core armature coil. A first end connection land 1r is formed in the inner diameter portion of the straight line having a tangential line around the arc, and a second end connection land 1t is formed between the regions.
On the second surface 1b of the printed wiring board 1, a commutator 1S made up of a plurality of commutator segments is printed and formed concentrically with the center of rotation, and the surface is gold-plated to maintain good contact. Winding type air-core armature coils 2A and 2B are mounted, and winding start terminals 2a and 2b are connected to the first terminal connection land 1r, and winding end terminals are connected to the second terminal connection land 1t. In addition, the printed wiring board 1 is integrated with the resin 3 so as to cover the outer diameter of the coiled air-core armature coil.
Here, a jig as shown in FIG. 3 is used as a connection means for the winding start terminals 2a and 2b of the winding type air-core armature coils 2A and 2B to the first terminal connection land. That is, the jig J has a flat portion Ja on which the printed wiring board 1 is placed, and portions 1c and 1d of the outer diameter formed by straight lines of the printed wiring board 1 at the air core armature coils 2A and 2B. In order to use this jig J, each of the air-core armature coils 2A, 2B is set up in the recess Jb. The winding start terminals 2a and 2b are soldered to the first terminal connection land 1r, and then each of the air core armature coils 2A and 2B is rotated by 90 degrees with the outer diameter portions 1c and 1d as fulcrums. Then, as shown by an imaginary line, the regions 1h and 1n may be laid and bonded. If the outer diameter of the coil varies considerably, the outer shape of the coil 22 is adjusted by sliding the movable member Jc supported by the retaining pin Jd as necessary before the adhesive is cured. The mounting position can be made constant.
In this way, even an air core armature coil with a small inner diameter does not have to be forced to insert a soldering iron, so it is easy to connect the winding start terminal, and the air core armature coil has an outer diameter even if the size varies. Since the position is constant, the amount of resin that wraps around the outer diameter of the coil during resin molding can be made constant.
Thereafter, the winding end terminal is solder-connected to the second terminal connection land 1t, but this portion is separated so as not to overlap, so that the winding type air-core armature coils 2A and 2B are separated from each other. Can easily.

前記印刷配線板１は、ロータ自体で振動を発生させるために、回転中心を介して前記空心電機子コイル反対側の広い方が欠除されていて非円形となっており、この欠除された部分に比重１５以上で軸方向抜け止め手段として第１、第２の段部４ａ、４ｂが設けられたタングステン合金製の偏心ウエイト４が配され、前記印刷配線板、軸方向空心電機子コイルと共に比重２以下の前記樹脂３で一体化され、偏心したロータＲに構成されている。
この偏心したロータは、さらに、回転中心に備えられた１個の焼結含油軸受Ｂが備えられる。この焼結含油軸受Ｂは樹脂で一体成形しても、あるいは樹脂成形後、圧入などで嵌着する手段を採用しても良い。
このようにすると、空心電機子コイルの巻き始め端末は、該コイルの内径内に収容されるので、射出金型から保護されるため、断線、ショートの問題が回避できる。 The printed wiring board 1 has a non-circular shape in which the wider side on the opposite side of the air-core armature coil is removed through the rotation center in order to generate vibrations in the rotor itself. An eccentric weight 4 made of tungsten alloy having a specific gravity of 15 or more and provided with first and second step portions 4a and 4b as an axial direction retaining means is arranged on the portion, together with the printed wiring board and the axial air-core armature coil. The rotor 3 is integrated and eccentric with the resin 3 having a specific gravity of 2 or less.
This eccentric rotor is further provided with one sintered oil-impregnated bearing B provided at the center of rotation. The sintered oil-impregnated bearing B may be integrally formed with a resin, or a means for press-fitting after resin molding may be employed.
In this case, since the winding start terminal of the air-core armature coil is accommodated within the inner diameter of the coil, it is protected from the injection mold, so that the problems of disconnection and short circuit can be avoided.

この偏心したロータＲは、図４に示すような軸方向空隙型コアレスモータとして活用される。すなわち、前記焼結含油軸受Ｂを介してブラケット５の中心に設けたバーリング部５ａに基端が圧入固着された軸６に回転自在に装着されて前記ブラケット５とケース７からなるハウジングＨに格納される。
このハウジングＨは薄型で強度はあるように構成するために厚みが０．２ｍｍ以下、好ましくは０．１５ｍｍ〜０．１ｍｍにステンレススチールで構成され、該ブラケット５に配されたリング状の軸方向空隙型マグネット８によって界磁され、このマグネットの内径部でフレキシブルブラシベース９に配された一対のブラシ１０、１０によって前記整流子Ｓを介して電力を受けるようになっている。ここで、該フレキシブルベースはポリエステルあるいはポリイミドフイルムからなり、厚みがのりを含めて０．１８ｍｍ程度のものが選定される。
前記ブラケット５には、前記マグネット８が載置された部分で該マグネットを横断するように透孔５ｂが設けられ、前記ブラシベースの一部が半径方向に延ばされ、この透孔を通って側方に給電電極として導出されるようになっている。
この透孔によってブラシベースの厚みが無視できるので、モータとして薄いものが実現できる。 The eccentric rotor R is utilized as an axial gap type coreless motor as shown in FIG. That is, it is rotatably mounted on the shaft 6 whose base end is press-fitted and fixed to the burring portion 5 a provided at the center of the bracket 5 via the sintered oil-impregnated bearing B, and is stored in the housing H including the bracket 5 and the case 7. Is done.
Since this housing H is thin and strong, it has a thickness of 0.2 mm or less, preferably 0.15 mm to 0.1 mm made of stainless steel, and a ring-shaped axial direction disposed on the bracket 5. A magnetic field is generated by the air gap type magnet 8, and power is received through the commutator S by a pair of brushes 10 and 10 disposed on the flexible brush base 9 at the inner diameter portion of the magnet. Here, the flexible base is made of polyester or polyimide film, and a thickness of about 0.18 mm including the glue is selected.
The bracket 5 is provided with a through hole 5b so as to cross the magnet at a portion where the magnet 8 is placed, and a part of the brush base is extended in the radial direction, and passes through the through hole. It is derived | led-out as a feed electrode to the side.
Since the thickness of the brush base can be ignored by this through hole, a thin motor can be realized.

図５は、通常回転型に応用したもので、すなわち、空心電機子コイル２２は同一なものを３個等分に印刷配線板１１の第１面の領域１１ｈに載置されるようになっている。この印刷配線板１１は外径の一部が前記空心電機子コイル２２の内径の外側の縁の部分まで直線状に後退していて全体として平面視３角形に形成されている。
該印刷配線板１１には、前述と同様に前記３個の空心電機子コイル２２の内径の位置に第１の端末結線ランド１１ｃ、１１ｄ及び１１ｅが印刷形成され、第２の端末結線ランド１１ｔが各空心電機子コイル間に印刷形成される。
このロータＲ１を製造するには、前述と同様にジグＪを利用してジグＪの凹所Ｊｂに前記各空心電機子コイル２２を立てて収め、巻始め端末２ａ、２ｂを前記第１の端末結線用ランド１ｒに半田付し、その後、前記外径の一部１ｃを支点として該各空心電機子コイル２２を９０度回転して前記領域に寝かせて接着するようにすればよい。ここでも、もし該コイルの外径がかなりばらつくなら、接着剤が硬化する前に、さらに、必要に応じて可動部材Ｊｃをスライドさせて該コイル２２の外形を合わせるようにして載置する位置を一定にすることもできる。
このようにすれば、内径の小さい空心電機子コイルでも無理に半田こてを入れなくて済むので、巻始め端末の結線処理が容易にできる。
前記空心電機子コイル２２の巻き終わり端末は、前述と同様に第２の端末結線ランド１１ｔに半田接続されるが、この部分は、各巻線型空心電機子コイル２２とオーバーラップしないように離れており、半田こてによる半田付はロータの外方から容易にできる。
その後、これらは一体に樹脂で成形されるものであるが、ここではロータＲ１は出力軸を有する通常回転型に構成するので、軸６はロータＲ１に固定されるように樹脂３３で一体化されている。
このようにしても、各空心電機子コイル２２の巻き始め端末は、射出金型から保護されるので、断線、ショートの問題が回避でき、前述のジグを利用した製造方法によって該コイルの外径も中心から一定にできるので、バランスがよくなる。 FIG. 5 shows an application to the normal rotary type, that is, the air-core armature coil 22 is placed in the region 11h on the first surface of the printed wiring board 11 in three equal parts. Yes. The printed wiring board 11 has a part of the outer diameter receding linearly to the outer edge of the inner diameter of the air-core armature coil 22 and is formed in a triangular shape in plan view as a whole.
On the printed wiring board 11, the first terminal connection lands 11c, 11d, and 11e are printed and formed at the inner diameter position of the three air-core armature coils 22 as described above, and the second terminal connection lands 11t are formed. Printed between each air-core armature coil.
In order to manufacture this rotor R1, using the jig J as described above, each of the air-core armature coils 22 is stood in the recess Jb of the jig J, and the winding start terminals 2a and 2b are connected to the first terminal. After soldering to the connection land 1r, each air-core armature coil 22 is rotated by 90 degrees with the part 1c of the outer diameter as a fulcrum, and is bonded to the region. Again, if the outer diameter of the coil varies considerably, before the adhesive is cured, the movable member Jc is further slid as necessary so that the outer shape of the coil 22 is matched. It can also be made constant.
In this way, even an air-core armature coil having a small inner diameter does not need to be forcedly inserted with a soldering iron, so that the wire connection process of the winding start terminal can be facilitated.
The winding end terminal of the air-core armature coil 22 is soldered to the second terminal connection land 11t in the same manner as described above, but this portion is separated so as not to overlap with each winding-type air-core armature coil 22. Soldering with a soldering iron is easy from the outside of the rotor.
After that, these are integrally molded with resin, but here the rotor R1 is configured as a normal rotary type having an output shaft, so the shaft 6 is integrated with the resin 33 so as to be fixed to the rotor R1. ing.
Even in this case, since the winding start terminal of each air-core armature coil 22 is protected from the injection mold, the problem of disconnection and short circuit can be avoided, and the outer diameter of the coil can be reduced by the manufacturing method using the above-mentioned jig. Since it can be made constant from the center, the balance is improved.

この発明によるコアレスモータ用ロータは、上述のように一体にモールドする構成にして強度を損なうことなく薄型にでき、特に軸方向空隙型コアレス振動モータに採用して極めて薄く構成できるようになり、移動体通信装置のような携帯機器に無音報知手段として産業上有意義な技術手段として奏するものである。
また、コアレスモータ用ロータとしては、実施例３のようにすれば、軸回転型であれば出力軸を有するスピンドルモータにも、また、出力軸にフアンを取り付けて冷却用フアンモータにも展開できる。さらに整流子として印刷配線板で形成したものを示したが、整流子セグメントは銅箔のままで別の整流子をこのセグメントに配したものでもよい。
なお、磁極の数は４極、２極でも組みあわせる軸方向空心電機子コイルに合わせて対応でき、コイルの数についても組みあわせるマグネットの磁極に合わせて設定できる。 The coreless motor rotor according to the present invention can be made thin without sacrificing strength by being integrally molded as described above, and can be adopted especially for axial gap type coreless vibration motors and can be made extremely thin. This is an industrially significant technical means as a silent notification means for a portable device such as a body communication device.
As the coreless motor rotor, as in the third embodiment, if it is a shaft rotation type, it can be deployed in a spindle motor having an output shaft, or in a cooling fan motor with a fan attached to the output shaft. . Furthermore, although the thing formed with the printed wiring board as a commutator was shown, the commutator segment may arrange | position another commutator to this segment with copper foil.
It should be noted that the number of magnetic poles can be adjusted according to the axial air-core armature coil to be combined even with 4 poles or 2 poles, and the number of coils can also be set according to the magnetic pole of the magnet to be combined.

本発明のコアレスモータ用ロータとして振動発生用に応用した場合の平面図である。（実施例１）It is a top view at the time of applying for a vibration generation as a rotor for coreless motors of this invention. (Example 1) 図１の印刷配線板の第２面側の平面図である。It is a top view by the side of the 2nd surface of the printed wiring board of FIG. 図１の巻線型空心電機子コイルの巻き始め端末処理の製造方法を説明するもので図１をＡ−Ａ線で切断した場合の要部断面図である。FIG. 2 is a cross-sectional view of a main part when FIG. 1 is cut along an AA line, illustrating a manufacturing method of a winding start terminal treatment of the wound air-core armature coil of FIG. 図１のロータを格納した軸固定型の軸方向空隙型コアレス振動モータの縦断面図である。（実施例２）FIG. 2 is a longitudinal sectional view of a shaft-fixed axial gap type coreless vibration motor storing the rotor of FIG. 1. (Example 2) 本発明のコアレスモータ用ロータを通常回転型に応用した場合の平面図である。（実施例３）It is a top view at the time of applying the rotor for coreless motors of this invention to a normal rotation type. Example 3

符号の説明Explanation of symbols

１、１１ 印刷配線板
２、２２ 巻線型空心電機子コイル
３ 、３３ 樹脂
４ 偏心ウエイト
Ｂ 焼結含油軸受
５ ブラケット
５ｂ 透孔
６ 軸
７ ケース
８ 軸方向空隙型マグネット
９ ブラシベース
１０ ブラシ
Ｒ、Ｒ１ 偏心ロータ DESCRIPTION OF SYMBOLS 1, 11 Printed wiring board 2, 22 Winding type | mold air-core armature coil 3, 33 Resin 4 Eccentric weight B Sintered oil-impregnated bearing 5 Bracket 5b Through-hole 6 Axis 7 Case 8 Axial direction gap type magnet
9 Brush base 10 Brush
R, R1 Eccentric rotor

Claims (6)

印刷配線板は第１の面に平面視で載置されるべき複数個の巻線型空心電機コイルの各有効導体部の半分以上を載置する領域があり、外径の一部がこの領域の外側で巻線型空心電機子コイルの内径の半分以上にかかるように形成され、この内径部分に第１の端末結線用ランドが形成されると共に、第２の端末結線ランドが前記各領域間に形成され、第２の面で回転中心と同心に複数個の整流子セグメントからなる整流子が配され、前記各領域に巻線型空心電機子コイルが載置されて巻始め端末が前記第１の端末結線用ランドに接続されると共に、巻き終わり端末が前記第２の端末結線ランドに接続され、該巻線型空心電機子コイルの外径を覆うように前記印刷配線板に樹脂で一体化され、回転中心で軸支承されたコアレスモータ用ロータ。   The printed wiring board has a region for placing more than half of each effective conductor portion of the plurality of wound type air core electric coils to be placed in a plan view on the first surface, and a part of the outer diameter is in this region. It is formed so as to cover more than half of the inner diameter of the wound air-core armature coil on the outer side, and a first terminal connection land is formed on the inner diameter portion, and a second terminal connection land is formed between the regions. A commutator comprising a plurality of commutator segments concentrically with the center of rotation on the second surface, and a winding-type air-core armature coil is placed in each region, and a winding start terminal is the first terminal It is connected to the connection land, and the winding end terminal is connected to the second terminal connection land, and is integrated with the printed wiring board so as to cover the outer diameter of the wire-wound air-core armature coil. A coreless motor rotor that is pivotally supported at the center. 前記巻線型空心電機子コイルは平面視で１７０度以下の配置開角で偏心して配され、前記外径の一部はほぼ前記巻線型空心電機子コイル内径の外側の辺のあたりを接線とする直線となっており、回転中心を介して前記各巻線型空心電機子コイルの反対側に少なくとも軸方向の抜け止め手段が設けられた比重１５以上のタングステン合金製の偏心ウエイトが前記印刷配線板、前記巻線型空心電機子コイルと共に比重２以下の樹脂で一体化され、前記回転中心に備えられた１個の焼結含油軸受で軸支承された請求項１に記載のコアレスモータ用ロータ。   The wound air-core armature coil is arranged eccentrically with an opening angle of 170 degrees or less in plan view, and a part of the outer diameter is tangent to the outer side of the inner diameter of the wound air-core armature coil. An eccentric weight made of a tungsten alloy having a specific gravity of 15 or more and provided with at least an axial retaining means on the opposite side of each of the winding type air-core armature coils via a rotation center is the printed wiring board, The coreless motor rotor according to claim 1, wherein the rotor for a coreless motor is integrated with a resin having a specific gravity of 2 or less together with a wound type air-core armature coil and is axially supported by one sintered oil-impregnated bearing provided at the rotation center. 前記印刷配線板は偏心ウエイトの主要部分が配置される部分が欠除されて非円形となっている請求項２に記載のコアレスモータ用ロータ。   The core for a coreless motor according to claim 2, wherein the printed wiring board has a non-circular shape by omitting a portion where a main portion of an eccentric weight is disposed. 請求項１の印刷配線板を形成する工程と、この印刷配線板をジグに装着する工程と、空心電機子コイルを前記外径の一部の位置で前記ジグに立てて配置する工程と、この空心電機子コイルの巻始め端末を前記第１の端末結線用ランドに接続する工程と、その後、該空心電機子コイルを印刷配線板に寝かせて添設する工程と、該空心電機子コイルの巻き終わり端末を前記第２の端末結線用ランドに接続する工程と、これらを一体にモールドする工程とを備えたコアレスモータ用ロータの製造方法。   A step of forming the printed wiring board according to claim 1; a step of mounting the printed wiring board on a jig; a step of placing an air-core armature coil on the jig at a position of the outer diameter; A step of connecting a winding start terminal of the air core armature coil to the first terminal connection land, a step of placing the air core armature coil on a printed wiring board, and a winding of the air core armature coil A method of manufacturing a rotor for a coreless motor, comprising: a step of connecting an end terminal to the second terminal connection land; and a step of molding them integrally. モールド前に偏心ウエイトを一体化する工程を備えた請求項４に記載のコアレスモータ用ロータの製造方法。   The manufacturing method of the rotor for coreless motors of Claim 4 provided with the process of integrating an eccentric weight before a mold. 請求項１〜３のいずれか１項に記載のコアレスモータ用ロータと、このロータを格納するもので厚みがそれぞれ０．２ｍｍ以下で構成されたケースとブラケットからなるハウジングと、前記ロータは軸を介して前記ハウジングに回転自在に支承され、該軸の周囲で前記ブラケットに添設されたブラシベースはフレキシブル基板で接着層を含めた厚みが０．１８ｍｍ以下で構成され、さらに前記ブラケットにはハウジングはマグネットが配される部分の一部を横切るように透孔が設けられ、この透孔を通って前記ブラシベースの一部がハウジング側方に給電電極として導出されている軸方向空隙型コアレスモータ。   The coreless motor rotor according to any one of claims 1 to 3, a housing for housing the rotor and a case and a bracket each having a thickness of 0.2 mm or less, and the rotor having a shaft. The brush base rotatably supported by the housing and attached to the bracket around the shaft is formed of a flexible substrate having a thickness including an adhesive layer of 0.18 mm or less, and the bracket includes a housing. Is an axial gap type coreless motor in which a through hole is provided so as to cross a part of the part where the magnet is disposed, and a part of the brush base is led out as a feeding electrode to the side of the housing through the through hole. .
JP2003290146A 2003-08-08 2003-08-08 Coreless motor rotor, method of manufacturing the rotor, and axial gap type coreless motor provided with the rotor Expired - Fee Related JP3530182B1 (en)

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CN 200410056557 CN1581649A (en) 2003-08-08 2004-08-09 Rotor for core-less motor and its mfg. method and core-less motor with axial clearance

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