JP2010148188A - Eccentric rotor and axial air-gap type coreless vibrating motor equipped with the eccentric rotor - Google Patents

Eccentric rotor and axial air-gap type coreless vibrating motor equipped with the eccentric rotor Download PDF

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JP2010148188A
JP2010148188A JP2008320521A JP2008320521A JP2010148188A JP 2010148188 A JP2010148188 A JP 2010148188A JP 2008320521 A JP2008320521 A JP 2008320521A JP 2008320521 A JP2008320521 A JP 2008320521A JP 2010148188 A JP2010148188 A JP 2010148188A
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wiring board
printed wiring
eccentric rotor
eccentric
gap type
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Tadao Yamaguchi
忠男 山口
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Shicoh Engineering Co Ltd
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Shicoh Engineering Co Ltd
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Priority to JP2008320521A priority Critical patent/JP2010148188A/en
Priority to CN200910164849A priority patent/CN101752971A/en
Priority to KR1020090091385A priority patent/KR20100070287A/en
Publication of JP2010148188A publication Critical patent/JP2010148188A/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K7/00Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/06Means for converting reciprocating motion into rotary motion or vice versa
    • H02K7/061Means for converting reciprocating motion into rotary motion or vice versa using rotary unbalanced masses
    • H02K7/063Means for converting reciprocating motion into rotary motion or vice versa using rotary unbalanced masses integrally combined with motor parts, e.g. motors with eccentric rotors
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K7/00Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/06Means for converting reciprocating motion into rotary motion or vice versa
    • H02K7/065Electromechanical oscillators; Vibrating magnetic drives
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K7/00Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08Structural association with bearings
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K2203/00Specific aspects not provided for in the other groups of this subclass relating to the windings
    • H02K2203/03Machines characterised by the wiring boards, i.e. printed circuit boards or similar structures for connecting the winding terminations
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M19/00Current supply arrangements for telephone systems
    • H04M19/02Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
    • H04M19/047Vibrating means for incoming calls

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc Machiner (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Motor Or Generator Frames (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an eccentric rotor which improves durability by securing rigidity for holding a bearing which is embedded in a motor while the motor is low in back height, and the axial air-gap type coreless vibrating motor equipped with the rotor. <P>SOLUTION: The eccentric rotor includes: a printed wiring board 1 having a bearing support hole 1a at its center; a plurality of air-core armature coils 2; the bearing 3 which is arranged in the bearing support hole 1a, and joined to the printed wiring board 1 at its external periphery; an eccentric weight W which is arranged so that a main part is not overlapped with the printed wiring board 1; resin 4 integrated with these items; and a commutator 5 arranged on the printed wiring board 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

この発明は、移動体通信装置の無音報知手段等に用いて好適なもので偏心ロータと該ロータを備えた軸方向空隙型モータの改良に係り、特に軸固定型に採用して軸受の保持強度を十分に確保するものに関する。   The present invention relates to an eccentric rotor and an improvement in an axial air gap type motor provided with the rotor, and is particularly suitable for use in a silent notification means of a mobile communication device. It relates to the thing which secures enough.

移動体通信装置の無音報知手段として遠心力振動を利用した振動モータが一般的で、このような振動モータは、通常回転型筒型モータの出力軸に断面が銀杏の葉のような形状の偏心ウエイトを取り付けたものがある。また、軸方向空隙型の扁平なモータでは、内蔵するロータ自体で遠心力振動を発生するものがある。ロータ内蔵型振動モータは、出力軸が不要なので、軸回転型から近年では1個の軸受をロータに内蔵させた軸固定型にしたものが賞用されている。このような軸固定型として、特許文献1では、ブラケットにバーリング孔を設けて軸の基端を圧入固定し、ケース側で該軸の他端を受けるようにしている。   A vibration motor using centrifugal force vibration is generally used as a silence notification means of a mobile communication device, and such a vibration motor has an eccentric shape having a cross-sectional shape like a ginkgo leaf on the output shaft of a normal rotary type cylindrical motor. Some have weights attached. In addition, some axial gap type flat motors generate centrifugal force vibration in the built-in rotor itself. Since the rotor built-in type vibration motor does not require an output shaft, in recent years, a shaft-fixed type in which one bearing is built in the rotor has been awarded. As such a fixed shaft type, in Patent Document 1, a burring hole is provided in a bracket so that the base end of the shaft is press-fitted and fixed, and the other end of the shaft is received on the case side.

これらのモータは低背化のために一般的に軸方向摺接型となり、ロータとして一般的には、コミュテータを印刷配線板の一側に複数個のセグメント片を印刷で形成し数ミクロンの貴金属メッキし、1個の焼結含油軸受と共に樹脂で一体成形してなるものである。   These motors are generally axially slidable to reduce the height, and as a rotor, a commutator is generally formed by printing a plurality of segment pieces on one side of a printed wiring board, and several microns of precious metal It is plated and integrally molded with resin together with one sintered oil-impregnated bearing.

ところが、直径10mm、厚み2.5mm程度のモータが要求されるようになると、軸受も直径1.5mm程度の小型なものとなってしまい、落下などの衝撃が加わると搭載される機器の重量に応じた重力の加速度が加わり、ロータ内で軸方向に軸受が抜けてしまう問題が生ずる。   However, when a motor having a diameter of about 10 mm and a thickness of about 2.5 mm is required, the bearing also becomes a small one having a diameter of about 1.5 mm. A corresponding acceleration of gravity is applied, and a problem arises that the bearing comes off in the axial direction in the rotor.

特許第3261329号公報Japanese Patent No. 3261329

この軸受の軸方向の移動を防ぐには、軸受の外周に凹凸部を形成して樹脂に食い込むようにすればよいが、外径が1.5mm程度で、長さが1.1mmの小型化されているとこの凹凸を形成させることが困難であり、また、軸受長が少なく、軸受投影面積も少なくなって耐久性に問題がでる。   In order to prevent this axial movement of the bearing, it is only necessary to form an uneven portion on the outer periphery of the bearing so as to bite into the resin. However, the outer diameter is about 1.5 mm and the length is 1.1 mm. If this is done, it is difficult to form the irregularities, and the bearing length is short and the projected area of the bearing is also reduced, resulting in a problem in durability.

この発明の目的は、低背モータながら内蔵する軸受保持強度を十分に確保すると共に、軸受投影面積を確保して耐久性を十分に得ようとするものである。   An object of the present invention is to secure a sufficient bearing holding strength built-in in spite of a low-profile motor and to obtain sufficient durability by securing a bearing projection area.

上記課題を解決するには、基本的な構成として請求項1に示すように中心に軸支承孔が備えられた印刷配線板と、複数の空心電機子コイルと、前記軸支承孔の位置に配され、外周が前記印刷配線板に接合された軸受と、主要部が前記印刷配線板と重畳しないように配された偏心ウエイトと、これらが一体化された樹脂と、前記印刷配線板に配されたコミュテータとが備えられたもので達成できる。   In order to solve the above-mentioned problem, as shown in claim 1, as a basic configuration, a printed wiring board provided with a shaft support hole at the center, a plurality of air-core armature coils, and a position of the shaft support hole are arranged. A bearing whose outer periphery is joined to the printed wiring board, an eccentric weight arranged so that the main part does not overlap the printed wiring board, a resin in which these are integrated, and a printed wiring board. This can be achieved with a commutator.

具体的な構成として請求項2に示すように前記軸支承孔の外方に接合パターンが印刷形成され、この接合パターンに前記軸受の外周の一部が溶接で接合されたものがよい。   As a specific configuration, as shown in claim 2, it is preferable that a joining pattern is printed and formed on the outer side of the shaft support hole, and a part of the outer periphery of the bearing is joined to the joining pattern by welding.

更に、請求項3に示すように前記偏心ウエイトは前記主要部から突き出され、前記印刷配線板に重畳する舌片で前記印刷配線板に接合されたものがよい。   Further, as shown in claim 3, it is preferable that the eccentric weight protrudes from the main portion and is joined to the printed wiring board by a tongue piece overlapping the printed wiring board.

別の具体的構成としては、請求項4に示すように前記印刷配線板は空心電機子コイルと重畳しないように配されたものがよい。   As another specific configuration, as shown in claim 4, the printed wiring board is preferably arranged so as not to overlap with the air-core armature coil.

この構成は、更に請求項5に示すように前記樹脂は端末保護手段として前記空心電機子コイルの端末を覆うようになっていて前記印刷配線板には樹脂挿通孔が形成されているものがよい。   Further, as shown in claim 5, the resin preferably covers the terminal of the air-core armature coil as a terminal protection means, and the printed wiring board is formed with a resin insertion hole. .

このような軸方向空隙型ロータを使用してモータにするには、請求項6に示すように請求項1〜5の何れか1項に記載の偏心ロータを用いた軸方向空隙型コアレスモータであって、前記軸方向空隙型偏心ロータはケースとブラケットとからなるハウジングに軸を介して回転自在に支持され、前記コミュテータに先端が摺接されたブラシと、前記ブラシの基端が植設され、一部が前記ブラケットの厚み内で前記マグネットの下方を通って前記ケース側方に給電端子として導出させたブラシベースとが備えられたもので達成できる。   In order to make a motor using such an axial gap type rotor, an axial gap type coreless motor using the eccentric rotor according to any one of claims 1 to 5 as shown in claim 6. The axial gap type eccentric rotor is rotatably supported via a shaft by a housing made up of a case and a bracket, and a brush whose tip is in sliding contact with the commutator and a base end of the brush are implanted. This can be achieved by providing a brush base that is partially led out as a power supply terminal to the side of the case through the lower side of the magnet within the thickness of the bracket.

請求項1、2の発明によれば、軸受は印刷配線板に半田などの溶接で接合させたので、樹脂で一体化するに当たって印刷配線板が骨幹として機能するため、衝撃時に軸受が軸方向に動いて抜けること無く耐衝撃性が十分なものとなる。   According to the first and second aspects of the invention, since the bearing is joined to the printed wiring board by welding such as solder, the printed wiring board functions as a skeleton when integrated with the resin. The impact resistance is sufficient without moving out.

請求項3の発明によれば、前記偏心ウエイトは前記印刷配線板と重畳しない主要部によってロータ一杯に厚みが確保されるので、偏心量が大きく得られ、該主要部より薄い舌片で前記印刷配線板に溶接接合されて樹脂で覆われるので、衝撃強度が十分に得られる。   According to a third aspect of the present invention, since the thickness of the eccentric weight is ensured to the full extent of the rotor by the main portion that does not overlap with the printed wiring board, a large amount of eccentricity is obtained, and the printing is performed with a tongue piece thinner than the main portion Since it is welded to the wiring board and covered with resin, sufficient impact strength can be obtained.

請求項4の発明によれば、印刷配線板は有効磁界中にこないので、薄型ロータでもコイルにかかる有効磁束密度を高めることができる。   According to the invention of claim 4, since the printed wiring board does not enter the effective magnetic field, the effective magnetic flux density applied to the coil can be increased even with a thin rotor.

請求項5の発明によれば、空心電機子コイルの端末が金型で潰されること無く、樹脂挿通孔によって樹脂の成型時の流れが確保できるので、成型時のショートモールドなどが無くなる。   According to the fifth aspect of the present invention, since the end of the air-core armature coil is not crushed by the mold and the flow of the resin during molding can be secured by the resin insertion hole, there is no short mold during molding.

請求項6の発明によれば、内蔵する軸受保持強度を十分に確保し、ブラシに給電するに当たってマグネットの下方を利用しながらも厚みを犠牲にすること無く低背なモータが得られる。   According to the sixth aspect of the present invention, it is possible to obtain a low-profile motor without sacrificing the thickness while sufficiently securing the built-in bearing holding strength and utilizing the lower part of the magnet when supplying power to the brush.

中心に軸支承孔が備えられた印刷配線板と、複数の空心電機子コイルと、前記軸支承孔の位置に配され、外周が前記印刷配線板に接合された軸受と、主要部が前記印刷配線板と重畳しないように配された偏心ウエイトと、これらが一体化された樹脂と、前記印刷配線板に配されたコミュテータとが備えられたもので、図1は、実施例1に係る軸方向空隙型偏心ロータを備えた軸方向空隙型コアレス振動モータの断面図である。図2は図1の軸方向空隙型偏心ロータの底面図、図3は図1の軸方向空隙型偏心ロータの平面図、図4は実施例2(変形例)に係る軸方向空隙型偏心ロータの変形例の平面図、図5は図4の軸方向空隙型偏心ロータに使用するコミュテータの平面図、そして図6は、図4の軸方向空隙型偏心ロータを内蔵させた軸方向空隙型コアレス振動モータの断面図である。   Printed wiring board provided with a shaft support hole in the center, a plurality of air-core armature coils, a bearing disposed at the position of the shaft support hole, and an outer periphery joined to the printed wiring board, and a main part of the printed circuit board An eccentric weight arranged so as not to overlap with a wiring board, a resin in which these are integrated, and a commutator arranged on the printed wiring board are provided. FIG. It is sectional drawing of the axial direction air gap type coreless vibration motor provided with the direction air gap type eccentric rotor. 2 is a bottom view of the axial gap eccentric rotor of FIG. 1, FIG. 3 is a plan view of the axial gap eccentric rotor of FIG. 1, and FIG. 4 is an axial gap eccentric rotor according to the second embodiment (modified example). FIG. 5 is a plan view of a commutator used in the axial gap eccentric rotor of FIG. 4, and FIG. 6 is an axial gap coreless in which the axial gap eccentric rotor of FIG. 4 is incorporated. It is sectional drawing of a vibration motor.

この発明の実施例1に係る軸方向空隙型偏心ロータRは図1〜図3において、中心に軸支承孔1aを形成した印刷配線板1と、該印刷配線板1の半径方向外方で該印刷配線板1に重畳しないように配された複数(ここでは配置ピッチ60°で3個)の空心電機子コイル2と、前記軸支承孔1aに装着されて接合された軸受3と、前記印刷配線板1に一部で半田付けされた偏心ウエイWと共に熱変形温度が250℃以上の樹脂4で一体され、表面に貴金属をクラッドで形成させた複数(ここでは6個)のコミュテータ片5を配したものである。   1 to 3, the axial gap type eccentric rotor R according to the first embodiment of the present invention includes a printed wiring board 1 in which a shaft support hole 1a is formed at the center, and a radially outer side of the printed wiring board 1. A plurality of (here, three at an arrangement pitch of 60 °) air-core armature coils 2 arranged so as not to overlap with the printed wiring board 1, the bearing 3 mounted and joined to the shaft support hole 1a, and the printing A plurality of (in this case, six) commutator pieces 5 which are integrated with a resin 4 having a thermal deformation temperature of 250 ° C. or more together with an eccentric way W which is partially soldered to the wiring board 1 and which is formed with a noble metal clad on the surface. It is a thing arranged.

前記印刷配線板1の軸支承孔1aに装着された軸受3は、前記軸支承孔1aの周囲に印刷形成された接合パターン1bにジグを利用して鉛直度を出した後、発熱が周囲に伝わりにくいレーザ照射によって半田付け1cで溶接接合される。前記偏心ウエイトWは内方に突き出された舌片Waに半田を塗布し、やはりレーザ照射で前記印刷配線板1に半田付け1dで溶接接合される。従って、軸受3は両端が露出されていても射出成形樹脂半田付部分が覆われ、抜け強度が十分に確保される。前記コミュテータ片5は、貴金属を表面にクラッドした摺接部5aと軸方向に折れ曲がった接続部5bから成り、スリット溝4aを隔てて6個等分に配置される。前記接続部5bは前記印刷配線板1に形成したスルーホール1eに填め込まれて上面で半田付け結線される。   The bearing 3 mounted in the shaft support hole 1a of the printed wiring board 1 generates a vertical degree by using a jig on the bonding pattern 1b printed and formed around the shaft support hole 1a, and then generates heat around it. It is welded and joined by soldering 1c by laser irradiation that is not easily transmitted. The eccentric weight W is soldered to the printed wiring board 1 by soldering 1d by applying a solder to the tongue piece Wa protruding inward, and also by laser irradiation. Therefore, even if both ends of the bearing 3 are exposed, the injection-molded resin soldered portion is covered, and the pull-out strength is sufficiently secured. The commutator piece 5 is composed of a sliding contact portion 5a clad with a noble metal on the surface and a connection portion 5b bent in the axial direction, and is arranged in six equal portions with a slit groove 4a therebetween. The connecting portion 5b is inserted into a through hole 1e formed in the printed wiring board 1 and soldered on the upper surface.

更に、前記印刷配線板1は、底面から見て外周の一部が前記空心電機子コイル2の外形に合わせたガイドとなって、対向するコミュテータ片5をショートするためにスルーホール1eなどを介してショートするパターン1fが形成され、上面側に前記空心電機子コイルの各巻き始め端末a、b及びcを半田結線する端末結線パターン1gが凹所4eの位置に印刷形成され、更に、巻き終わり端末dを一括半田結線する端末結線パターン1hが印刷形成されている。このように構成された印刷配線板1は各空心電機コイルの端末を半田結線した後、前記のように軸受3の外周が接合パターン1bに半田付1cで溶接され、前記偏心ウエイトWが舌片Waで半田付け1dされることによって溶接接合され、前記空心電機子コイルの厚み内となるように前記樹脂4で一体成形される。従って、これらの部材は樹脂の内部に収められるので骨幹として機能することになり、十分な強度が確保される。特に舌片Waの上面の樹脂が薄くなってしまっても印刷配線板との間に樹脂部分が十分に確保されるので抜け強度が確保される。ここで前記軸受3は、図示の構成から判るようにロータ上下から突き出されるように長手方向が確保され、即ち、モータの厚みの85%以上、たとえばモータの厚みが2.4mm程度であっても長さが2.1mm以上確保されるので、軸と軸受間のクリアランスによるロータの傾きが少なくなり、空隙を多く取る必要が無くなるので、その分有効磁束密度が確保され、加工の容易性と回転時の耐久性が良好なものとなる。   Further, the printed wiring board 1 has a part of the outer periphery as viewed from the bottom surface serving as a guide that matches the outer shape of the air-core armature coil 2, and through a through hole 1 e to short the opposing commutator pieces 5. A short-circuit pattern 1f is formed, and terminal connection patterns 1g for soldering the respective winding start terminals a, b and c of the air-core armature coil are printed on the upper surface side and printed at the positions of the recesses 4e. A terminal connection pattern 1h for collectively soldering the terminals d is printed. In the printed wiring board 1 configured as described above, after the ends of the respective air-core electric coils are soldered, the outer periphery of the bearing 3 is welded to the bonding pattern 1b by the soldering 1c as described above, and the eccentric weight W is formed as a tongue piece. It is welded and joined by soldering 1d with Wa, and is integrally formed with the resin 4 so as to be within the thickness of the air-core armature coil. Therefore, since these members are housed in the resin, they function as a diaphysis, and sufficient strength is ensured. In particular, even if the resin on the upper surface of the tongue piece Wa becomes thin, a sufficient resin portion is secured between the printed wiring board and the removal strength is ensured. Here, the bearing 3 is secured in the longitudinal direction so as to protrude from the top and bottom of the rotor as seen from the configuration shown in the drawing, that is, 85% or more of the thickness of the motor, for example, the thickness of the motor is about 2.4 mm. Since the length of 2.1 mm or more is secured, the inclination of the rotor due to the clearance between the shaft and the bearing is reduced, and it is not necessary to take a lot of air gaps. The durability during rotation is good.

この軸方向空隙型偏心ロータRは、更に樹脂の一部で端末保護手段としてわずかな、たとえばコイル端末が隠れる程度の盛り上がり部4bが形成され、前記空心電機子コイルの各巻き始め端末a,b及びcがこの盛り上がり部に通されるようにして樹脂で覆われ、射出成型時に金型で潰されないように配慮されている。更に前記コミュテータ片5が配される側の外周全周に亘って垂下部4cが形成され、この垂下部4cには各電機子コイルの巻き終わり端末dが一括して通され、樹脂で覆われることによって端末保護手段を構成すると共に、偏心ウエイトWの落下などによる抜け止め用強度確保手段としての機能を果たしている。   The axial gap type eccentric rotor R is further formed with a part of the resin, which forms a slightly raised portion 4b as a terminal protection means, for example, the coil terminal is hidden, and each winding start terminal a, b of the air-core armature coil. And c are covered with resin so as to pass through the raised portion, and care is taken so as not to be crushed by the mold during injection molding. Further, a drooping portion 4c is formed over the entire outer periphery on the side where the commutator piece 5 is disposed, and the winding end terminals d of the armature coils are collectively passed through the drooping portion 4c and covered with resin. As a result, the terminal protection means is configured, and the function as a strength securing means for retaining the eccentric weight W due to dropping or the like is achieved.

前記偏心ウエイトWは重量を確保するためにロータの厚み一杯にする必要があり、即ち主要な両面が露出されるように成形されると共に、内外方に一体に舌片Wa、Wbが形成され、接合手段として前記舌片Waの半田付で固着されると共に、各舌片Wa、Wbと印刷配線板1が樹脂4に覆われることによって抜け強度を確保している。このようにすることによって前記空心電機子コイル2と偏心ウエイトWの比重差、体積比により十分な偏心量が得られる。   In order to secure weight, the eccentric weight W needs to be full of the rotor thickness, that is, formed so that the main both surfaces are exposed, and tongue pieces Wa and Wb are integrally formed inside and outside, As the joining means, the tongue pieces Wa are fixed by soldering, and the tongue pieces Wa and Wb and the printed wiring board 1 are covered with the resin 4 to ensure the removal strength. By doing so, a sufficient amount of eccentricity can be obtained by the specific gravity difference and volume ratio between the air-core armature coil 2 and the eccentric weight W.

この軸方向空隙型偏心ロータRは、更にまた、前記印刷配線板1の上面で前記接続部5bが半田付けできるように凹所4eが形成され、前記接続部5bと共に前記空心電機コイル2の巻き始め端末a、b及びcがレーザ照射などで半田溶接され、適当な空間に樹脂挿通孔1jが設けられ、樹脂4がよく回り込むように配慮されている。   The axial gap type eccentric rotor R is further formed with a recess 4e on the upper surface of the printed wiring board 1 so that the connecting portion 5b can be soldered, and the air core electric coil 2 is wound together with the connecting portion 5b. At first, the terminals a, b and c are solder-welded by laser irradiation or the like, and a resin insertion hole 1j is provided in an appropriate space, so that the resin 4 is well wound.

この軸方向空隙型偏心ロータRを格納するには、先に軸7の先端がケース9の中心に小径の透孔を有する凹所9aに填め込まれ、外方からレーザ溶接することによって準備される。偏心ロータRは、このようにした軸7に前記含油軸受3、スラストワッシャSを介して回転自在に装着され、ブラケット6にブラシベース10を介して90°の開角で摺接された一対のブラシBとこのブラシBの外方で前記ブラケット6に配されたマグネット8と空隙を介して対向させ、ハウジングとしてのブラケット6とケース9に格納される。その後、前記軸7はブラケット6の中央の小径の透孔を有する凹所6aにレーザ溶接で基端を固定され、前記ブラケット6の外周とケース9の開口部でやはりレーザ溶接されて組み立てられる。図中、rは、隣り合ったコミュテータ片を結ぶ火花消去用印刷形成抵抗で、4dは、射出成形時に位置決めとして利用するガイドピンよる抜け穴であり、4fはモールドゲート、更にWcは射出金型に位置決め用として設けられた偏心ウエイトの位置決め凹所である。   In order to store the axial gap type eccentric rotor R, the tip of the shaft 7 is first inserted into a recess 9a having a small-diameter through hole at the center of the case 9, and prepared by laser welding from the outside. The The eccentric rotor R is rotatably mounted on the shaft 7 having such a configuration via the oil-impregnated bearing 3 and the thrust washer S, and is slidably contacted with the bracket 6 via the brush base 10 at an opening angle of 90 °. The brush B faces the magnet 8 disposed on the bracket 6 outside the brush B through a gap, and is stored in a bracket 6 as a housing and a case 9. After that, the shaft 7 is assembled by being laser-welded at the outer periphery of the bracket 6 and the opening of the case 9 by fixing the base end to the recess 6 a having a small-diameter through hole in the center of the bracket 6. In the figure, r is a spark erasing print forming resistor that connects adjacent commutator pieces, 4d is a through hole formed by a guide pin used for positioning during injection molding, 4f is a mold gate, and Wc is an injection mold. It is a positioning recess of an eccentric weight provided for positioning.

ここでブラシBは、0.05mmの洋白板に摺接面に貴金属クラッドしたもので、前記ブラケットに添設したブラシベース10に基端が半田付け接続されているものである。このブラシBを植設したブラシベース10は図1に示すように一部10aが前記ブラケット6に空けられた透孔6cを通ってケース9の側方に導出され給電端子となっている。   Here, the brush B is a 0.05 mm white plate with a noble metal clad on the sliding contact surface, and a base end is soldered and connected to a brush base 10 attached to the bracket. As shown in FIG. 1, the brush base 10 in which the brush B is implanted has a portion 10 a led out to the side of the case 9 through a through hole 6 c formed in the bracket 6 and serves as a power supply terminal.

尚、ブラケットの厚みが0.25程度あれば、前記透孔6cの変わりに押しつぶしで形成した凹所にしてもよい。   In addition, if the thickness of a bracket is about 0.25, you may make it the recess formed by crushing instead of the said through-hole 6c.

このようにすれば、給電端子としてマグネット下方を通して前記ケース側方に導出させるに当たってブラシベース10の厚みを無視できる。   In this way, the thickness of the brush base 10 can be neglected when the power supply terminal is led out to the side of the case through the lower part of the magnet.

図4〜図6において、図4は、図3の変形例を示すもので、有効導体部分が組み合わせるマグネットの磁極の開角程度(ここでは90°)まで開いて効率を上げるようにした巻線型空心電機子コイル22を、ここでは120度程度の配置開角で2個で構成したものであり、ここでは、コイルの効率を確保することによって印刷配線板11はこれらのコイルに重畳させたもので、巻き始め結線パターン11kが形成され、巻き終わり一括結線パターン11hが各コイル間に形成され、各コイル22の巻き始め端末22a、22bが前記巻き始め結線パターン11kに、巻き終わり端末22dが前記一括結線パターンに11hにそれぞれ半田付けされる。焼結含油軸受3の外周が接合パターン11bに半田付けで溶接接合されるのは、前述の実施例1と同様である。その他の部材は前述と同等なので同一符号を付してその説明は省略するが、空心電機子コイルが2個となっているため、端末処理が少なくなって各結線パターンなどはかなり省略できる。図5に示す印刷配線板11は、コミュテータ片55が印刷で形成され、摺接表面に数ミクロンの金メッキが施されたものである。図中、11mは印刷配線板に形成した補強用パターン、55dは、印刷配線板11に設けられた空心電機子コイル取り付け位置決めガイドであり、55eは、同コイルの巻き始め端末22a、22bが射出成型時潰れてしまわないように配慮した凹所で、樹脂成形時には印刷配線板の厚み内に収まり端末保護手段を構成していることになる。その他の部材は機能が同一なものは同一符号を記してその説明を省略する。   4 to 6, FIG. 4 shows a modification of FIG. 3, and is a winding type in which the effective conductor portion is opened up to about the opening angle of the magnetic pole of the magnet combined (90 ° in this case) to increase the efficiency. Here, the air-core armature coil 22 is composed of two pieces with an arrangement opening angle of about 120 degrees. Here, the printed wiring board 11 is superimposed on these coils by ensuring the efficiency of the coils. Then, the winding start connection pattern 11k is formed, and the winding end batch connection pattern 11h is formed between the coils. It is soldered to 11h to the batch connection pattern. The outer periphery of the sintered oil-impregnated bearing 3 is welded and joined to the joining pattern 11b by soldering, as in the first embodiment. Since the other members are the same as described above, the same reference numerals are given and description thereof is omitted. However, since there are two air-core armature coils, the terminal processing is reduced and each connection pattern can be omitted considerably. The printed wiring board 11 shown in FIG. 5 has a commutator piece 55 formed by printing, and a slidable contact surface is plated with gold of several microns. In the figure, 11m is a reinforcing pattern formed on the printed wiring board, 55d is an air-core armature coil mounting positioning guide provided on the printed wiring board 11, and 55e is the winding start terminal 22a, 22b of the same coil. The recess is designed so as not to be crushed at the time of molding, and is contained within the thickness of the printed wiring board at the time of resin molding to constitute a terminal protection means. Other members having the same function are denoted by the same reference numerals and description thereof is omitted.

尚、前記空心電機子コイル22の配置開角は、偏心ウエイトの重量(平面視面積)を大にする必要があるときは、150度程度まで許容される。   The opening angle of the air-core armature coil 22 is allowed to be about 150 degrees when it is necessary to increase the weight (area in plan view) of the eccentric weight.

上記の実施例では軸受、偏心ウエイトは簡便化のため、半田付けで印刷配線板に溶接接合したものを示したが、また、焼結含油軸受は多孔質なので、オイルが含浸されていてもある程度接着力を維持できるため、これらは強力なエポキシ接着などによる接合構造にしてもよい。   In the above embodiment, the bearing and the eccentric weight are shown as welded and joined to the printed wiring board by soldering for the sake of simplicity. However, since the sintered oil-impregnated bearing is porous, the oil is impregnated to some extent. Since the adhesive force can be maintained, these may be joined by a strong epoxy adhesive or the like.

実施例1に係る軸方向空隙型偏心ロータを備えた軸方向空隙型コアレス振動モータの断面図である。1 is a cross-sectional view of an axial gap type coreless vibration motor including an axial gap type eccentric rotor according to Embodiment 1. FIG. 図1の軸方向空隙型偏心ロータの底面図である。It is a bottom view of the axial direction air gap type eccentric rotor of FIG. 図1の軸方向空隙型偏心ロータの平面図である。It is a top view of the axial direction air gap type eccentric rotor of FIG. 実施例2に係る軸方向空隙型偏心ロータの変形例の平面図である。FIG. 10 is a plan view of a modified example of the axial gap type eccentric rotor according to the second embodiment. 図4の軸方向空隙型偏心ロータに使用するコミュテータの平面図である。It is a top view of the commutator used for the axial direction space | gap type eccentric rotor of FIG. 実施例2に係る軸方向空隙型偏心ロータを備えた軸方向空隙型コアレス振動モータの断面図である。FIG. 6 is a cross-sectional view of an axial gap type coreless vibration motor including an axial gap type eccentric rotor according to a second embodiment.

符号の説明Explanation of symbols

1、11 印刷配線板
1a 軸支承孔
1b 接合パターン
1c、1d 半田付
1e スルーホール
1f、1g、1h 結線パターン
2、22 巻線型空心電機子コイル
3 焼結含油軸受
4 樹脂
4a スリット溝
4b 盛り上がり部
4c 垂下部
4e 凹所
5 コミュテータ片
5a 摺接部
5b 接続部
6 ブラケット
7 軸
8 マグネット
9 ケース
B ブラシ
R 偏心ロータ
W 偏心ウエイト
Wa 舌片
Wb 舌片
DESCRIPTION OF SYMBOLS 1,11 Printed wiring board 1a Shaft support hole 1b Joining pattern 1c, 1d Soldering 1e Through hole 1f, 1g, 1h Connection pattern 2, 22 Winding type air-core armature coil 3 Sintered oil-impregnated bearing 4 Resin 4a Slit groove 4b Swelling part 4c hanging part 4e recess 5 commutator piece 5a sliding contact part 5b connecting part 6 bracket 7 shaft 8 magnet 9 case B brush R eccentric rotor W eccentric weight Wa tongue piece Wb tongue piece

Claims (6)

中心に軸支承孔が備えられた印刷配線板と、
複数の空心電機子コイルと、
前記軸支承孔の位置に配され、外周が前記印刷配線板に接合された軸受と、
主要部が前記印刷配線板と重畳しないように配された偏心ウエイトと、
これらが一体化された樹脂と、
前記印刷配線板に配されたコミュテータとが備えられた偏心ロータ。
A printed wiring board with a shaft support hole in the center;
A plurality of air-core armature coils;
A bearing which is arranged at the position of the shaft support hole and whose outer periphery is joined to the printed wiring board;
An eccentric weight arranged so that the main part does not overlap the printed wiring board;
A resin in which these are integrated;
An eccentric rotor provided with a commutator disposed on the printed wiring board.
前記軸支承孔の外側に接合パターンが印刷形成され、この接合パターンに前記軸受の外周の一部が溶接で接合された請求項1に記載の偏心ロータ。   The eccentric rotor according to claim 1, wherein a joining pattern is printed on the outside of the shaft support hole, and a part of the outer periphery of the bearing is joined to the joining pattern by welding. 前記偏心ウエイトは前記主要部から突き出され、前記印刷配線板に重畳する舌片で前記印刷配線板に接合された請求項1に記載の偏心ロータ。   The eccentric rotor according to claim 1, wherein the eccentric weight protrudes from the main portion and is joined to the printed wiring board by a tongue piece overlapping the printed wiring board. 前記印刷配線板は空心電機子コイルと重畳しないように配された請求項1に記載の偏心ロータ。   The eccentric rotor according to claim 1, wherein the printed wiring board is arranged so as not to overlap with the air-core armature coil. 前記樹脂は端末保護手段として前記空心電機子コイルの端末を覆うようになっていて前記印刷配線板には樹脂挿通孔が形成されている請求項4に記載の偏心ロータ。   The eccentric rotor according to claim 4, wherein the resin covers a terminal of the air-core armature coil as a terminal protection means, and a resin insertion hole is formed in the printed wiring board. 請求項1〜5何れか1項に記載の偏心ロータを用いた軸方向空隙型コアレスモータであって、前記軸方向空隙型偏心ロータはケースとブラケットとからなるハウジングに軸を介して回転自在に支持され、前記コミュテータに先端が摺接されたブラシと、前記ブラシの基端が植設され、一部が前記ブラケットの厚み内で前記マグネットの下方を通って前記ケース側方に給電端子として導出させたブラシベースとが備えられた軸方向空隙型コアレス振動モータ。   An axial gap type coreless motor using the eccentric rotor according to any one of claims 1 to 5, wherein the axial gap type eccentric rotor is freely rotatable via a shaft in a housing composed of a case and a bracket. A brush supported at the tip of the commutator and a base end of the brush are planted, and a part of the brush passes below the magnet within the thickness of the bracket and is led out to the side of the case as a power supply terminal. An axial gap type coreless vibration motor provided with a brush base.
JP2008320521A 2008-12-17 2008-12-17 Eccentric rotor and axial air-gap type coreless vibrating motor equipped with the eccentric rotor Pending JP2010148188A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2008320521A JP2010148188A (en) 2008-12-17 2008-12-17 Eccentric rotor and axial air-gap type coreless vibrating motor equipped with the eccentric rotor
CN200910164849A CN101752971A (en) 2008-12-17 2009-08-11 Eccentric rotor and axial space type coreless vibration motor having the rotor
KR1020090091385A KR20100070287A (en) 2008-12-17 2009-09-26 Eccentric rotor and space formed on axial direction type coreless vibrating motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008320521A JP2010148188A (en) 2008-12-17 2008-12-17 Eccentric rotor and axial air-gap type coreless vibrating motor equipped with the eccentric rotor

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JP3261329B2 (en) * 1997-01-30 2002-02-25 東京パーツ工業株式会社 Fixed shaft type motor without output shaft
KR100511362B1 (en) * 2002-07-16 2005-08-31 엘지이노텍 주식회사 The mounting structure and mounting method of vibration motor
JP3560601B1 (en) * 2003-05-21 2004-09-02 東京パーツ工業株式会社 Molded eccentric rotor and axial gap type coreless vibration motor having the same rotor
US7800274B2 (en) * 2006-07-20 2010-09-21 Tokyo Parts Industrial Co., Ltd. Thin stator, eccentric motor and axial air-gap brushless vibration motor equipped with the same
CN101459368A (en) * 2008-12-17 2009-06-17 文登永柏微电机有限公司 Flat Type Vibration Motor

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