JP3734615B2

JP3734615B2 - Spindle motor and rotating body device

Info

Publication number: JP3734615B2
Application number: JP3618598A
Authority: JP
Inventors: 博昭並木; 岩城　　忠雄; 直樹川和田; 勇竹原; 隆石田; 伸一林崎; 博匡島口; 勝重今野
Original assignee: Seiko Instruments Inc
Current assignee: Seiko Instruments Inc
Priority date: 1998-02-18
Filing date: 1998-02-18
Publication date: 2006-01-11
Anticipated expiration: 2018-02-18
Also published as: JPH11234996A

Description

【０００１】
【発明の属する技術分野】
本願発明は、モータ組み立て時にモータコイルの端末とプリント基板にプリントされた導電線とを迅速かつ簡単に電気的導通状態にすることができ、また結線スペースが極めて小さくても迅速かつ簡単に結線状態にすることができるスピンドルモータ、及び回転体装置に関する。
【０００２】
【従来の技術】
超小型の電子機械装置、例えばＨＤＤ用スピンドルモータ（ロータの直径が１５ｍｍ位）の組み立て過程でモータコイルの端末とプリント基板の導電線の結線部は極めて小さくハンダを付ける必要があるため顕微鏡を使用し熟練工が手作業でハンダ付けを行っている。このため、生産性が向上しないとともに製作コストが高く付いている。
【０００３】
スピンドルモータの組み立てでモータコイルの端末とプリント基板の導電線の結線部のハンダ付けが難しいのは、モータコイルのコイル端末がモータフレームのモータコイルと対向する面に貼設されたプリント基板にプリントされた導電線に組み立て時に結線されるスピンドルモータにあっては、ハンダ付けがモータ内部のステータの下側にハンダこてを入れてハンダ付けを行う必要があることと、コイル線径が極細であることから顕微鏡を使用してハンダを極めて小さく付ける必要がありかつその際にモータコイルの端末がブラブラしてハンダ付けする位置へ安定させられないからであり、また、モータコイルのコイル端末がモータフレームの外面に貼設されたプリント基板にプリントされた導電線に組み立て時に結線されるスピンドルモータにあっては、コイル線径が極細であることから顕微鏡を使用してハンダを極めて小さく付ける必要がありかつその際にモータコイルの端末がブラブラしてハンダ付けする位置へ安定させられないからである。
【０００４】
【発明が解決しようとする課題】
本願発明は、上述した点に鑑み案出したもので、モータ組み立て時にモータコイルの端末とプリント基板にプリントされた導電線とを迅速かつ簡単に電気的導通状態にすることができ、また結線スペースが極めて小さくても迅速かつ簡単に結線状態にすることができるスピンドルモータ、及び回転体装置を提供することにある。
【０００５】
【課題を解決するための手段】
本願発明は、モータコイルのコイル端末がモータフレームのモータコイルと対向する面に貼設されたプリント基板にプリントされた導電線に組み立て時に結線されるスピンドルモータにおいて、前記プリント基板は、前記導電線の結線部の近傍に、導電材料よりなる挟着具が予め付設され、かつ、該挟着具と前記導電線の結線部とが電気的導通状態に接続され、該プリント基板の挟着具を付設した面と反対側の面を接着剤により前記モータフレームのモータコイルと対向する面に貼設されており、該挟着具に前記モータコイルのコイル端末を挟着することにより、モータコイルとプリント基板にプリントされた導電線とが電気的導通状態になることを特徴とするスピンドルモータを提供することにある。
【０００６】
また本願発明は、モータコイルのコイル端末がモータフレームに設けた小孔に通されモータフレームの外面に貼設されたプリント基板にプリントされた導電線に結線されるスピンドルモータにおいて、前記プリント基板は、前記モータフレームに設けた小孔に通されたモータコイルのコイル端末を通す小孔が設けられ、前記導電線の結線部の近傍に、導電材料よりなる挟着具が予め付設され、かつ、該挟着具と前記導電線の結線部とが電気的導通状態に接続され、該プリント基板の挟着具と反対側の面が接着剤により前記モータフレームのモータコイルと対向する面に貼設されており、前記モータフレームに設けた小孔に通されたモータコイルのコイル端末をプリント基板に設けた前記小孔に通してから挟着具に前記モータコイルのコイル端末を挟着することにより、モータコイルとプリント基板にプリントされた導電線とが電気的導通状態であることを特徴とするスピンドルモータを提供することにある。
【０００７】
また本願発明は、モータコイルのコイル端末がモータフレームに設けた小孔に通されモータフレームの外面に貼設されたプリント基板にプリントされた導電線に結線されるスピンドルモータにおいて、前記プリント基板は、前記モータフレームに設けた小孔に通されたモータコイルのコイル端末を通す小孔が設けられ、前記導電線の結線部の近傍に、導電材料よりなる挟着具が予め付設され、該プリント基板の挟着具と反対側の面が接着剤により前記モータフレームのモータコイルと対向する面に貼設されており、前記モータフレームに設けた小孔に通されたモータコイルのコイル端末をプリント基板に設けた前記小孔に通してから挟着具に前記モータコイルのコイル端末を挟着し、さらに該挟着具と前記導電線の結線部とが電気的導通状態に接続するか、又は前記モータコイルのコイル端末とプリント基板にプリントされた導電線との結線部とが結線されていることを特徴とするスピンドルモータを提供することにある。
【０００８】
また本願発明は、モータコイルのコイル端末がモータフレームに設けた小孔に通されモータフレームの外面に貼設されたプリント基板にプリントされた導電線に結線されるスピンドルモータにおいて、前記プリント基板は、前記導電線の結線部の近傍に、挟着具が予め付設され、該プリント基板の挟着具と反対側の面が接着剤により前記モータフレームのモータコイルと対向する面に貼設されており、前記モータフレームに設けた小孔に通されたモータコイルのコイル端末をプリント基板に設けた前記小孔に通してから挟着具に前記モータコイルのコイル端末を挟着しさらに該コイル端末をプリント基板にプリントされた導電線に対してハンダ付け又はボンディングにより結線されていることを特徴とするスピンドルモータを提供することにある。
【０００９】
また本願発明は、前記スピンドルモータを駆動源とすることを特徴とする回転体装置を提供することにある。
【００１０】
【発明の実施の形態】
本願発明の第一の実施の形態を図１（ａ），（ｂ），（ｃ）を参照して説明する。
図１（ａ）は、本願発明の一つの実施の形態に係るスピンドルモータを示す。図１（ｂ）はスピンドルモータに装着される結線機能付きプリント基板を示す。図１（ｃ）はモータコイルのコイル端末と結線機能付きプリント基板の導電線との結線状態を示す。
【００１１】
スピンドルモータＭ１は、流体動圧軸受を備えた超薄型、超小型のスピンドルモータであり、モータの内部に備えたプリント基板の導電線にモータコイルのコイル端末を電気的導通状態に接続している。
スピンドルモータＭ１は、スラスト動圧発生溝が両面に刻設されたスラスト軸受部１ａの両端に、支持軸部１ｂと周面にラジアル動圧発生溝が刻設されたラジアル軸受部１ｃを有する回転軸１と、ハウジング２と、押えリング３と、前記ハウジング２を支持するモータフレーム４と、回転軸１の支持軸部１ｂに被嵌固定されたロータ５と、ハウジング２の外周に圧入固着されたステータ６と、該ステータ６に備えられた例えば四極のモータコイル７と、ロータ５に設けられた永久磁石８と、ロータ５の上面に固着されたメディアチャック用磁石９と、モータフレーム４の上面に両面テープ１０により貼着された結線機能付きプリント基板Ａを備え、回転軸１の周囲に潤滑オイルが充填され、モータコイル７のコイル端末７ａが結線機能付きプリント基板Ａに接続されている。
【００１２】
図１（ｂ），（ｃ）に示すように、該結線機能付きプリント基板Ａは、円環部と直線部からなる虫メガネのフレーム形の基板１１に両端が結線部１２ａとなっている八本の導電線１２がプリント配線され、該基板１１の前記各結線部１２ａの近傍に挟着具１３が接着剤１４で貼着されている。該挟着具１３は、導電材料より成形されていて、基部１３ａと該基部１３ａより二山状に隆起した谷状挟着部１３ｂを有する。挟着具１３の基部１３ａと前記導電線１２の結線部１２ａとがハンダ１５により電気的導通状態に接続されている。なお、極数及び線の数は限定するものではない。
【００１３】
基板１１は、紙エポキシ樹脂、ベークライト、あるいはガラスエポキシ樹脂製の硬質基板を図示している。基板１１は、ポリイミド等の耐熱性フィルムからなるフレキシブル基板でも良く、その場合は、一枚の耐熱性フィルムにプリント配線し他の一枚の耐熱性フィルムでラミネートしかつプリント配線した導電線１２の端部の結線部についてはラミネートしないで露出させると、導電線１２の耐久性が確保できるとともに電気ショートを回避でき、さらに挟着具１３を結線部１２ａの近傍の導電線１２に重なる位置への貼着を可能となるので好ましい。
【００１４】
ハンダ１５に変えてボンディングにより挟着具１３の基部１３ａと前記導電線１２の結線部１２ａとを接続しても良い。ハンダやボンディングは取り付けスペースが必要であるが、装着箇所に取り付けスペースがない場合には、ハンダ又はボンディングを予め付けておくと良い。さらに、挟着具１３が導電材料より成形されている場合には、ハンダもボンディングもしないで、接着剤１４に導電性を有する接着剤を採用し、該接着剤１４を導電線１２の結線部１２ａの端部にオーバーラップさせて挟着具１３を基板１１に接着しても良い。
【００１５】
上記構成のように、予め、基板１１に付設する挟着具１３が基板１１にプリント印刷された導電線１２に対して電気的導通状態に接続されていれば、接続すべきモータコイル７の端末７ａは、挟着具１３の二山状に隆起した谷状挟着部１３ｂに外れないようにしっかりと挟着するだけで足りる。なお、モータコイル７の端末７ａが絶縁保護膜で覆われているときは、該絶縁保護膜を除いてから挟着する。
【００１６】
なお、この接続方法は、挟着具１３が導電材料より成形されている場合にも適用される。
この実施の態様は、モータコイル７のコイル端末７ａを挟着具１３の谷状挟着部１３ｂに挟着するために必要なスペースはピンセットを水平方向から差し込めるだけの大きさでよくハンダ付けに必要なスペースよりもかなり薄くて小さい空間で足りるから結線が迅速かつ簡単に行える。
【００１７】
次に、本願発明の第二の実施の形態を図２（ａ），（ｂ），（ｃ）を参照して説明する。
図２（ａ）に示すように、この実施の形態に係るスピンドルモータＭ２は、図１（ｂ）に示す結線機能付きプリント基板Ａに替えて、図２（ｂ）に示す結線機能付きプリント基板Ｂをモータフレーム４の下面に備えた点が図１に示す第一の実施の形態のスピンドルモータと相違している。
【００１８】
以下、この実施の形態のスピンドルモータの構成要素について、第一の実施の形態のスピンドルモータに比して、同一の構成要素に同一符号を付して説明は省略し、相違する構成要素についてのみ説明する。
図２（ａ）に示すように、結線機能付きプリント基板Ｂを貼着するため、モータフレーム４の下面に形成された凹部４ａに収容されている。図２（ｂ），（ｃ）に示すように、結線機能付きプリント基板Ｂは、挟着具１３の基部１３ａに小孔１３ｃが設けられ、かつ基板１１にも小孔１１ａが設けられ、小孔１３ｃと１１ａが一致しており、さらにモータフレーム４にも基板１１の小孔１１ａに一致して小孔４ｂが設けられている。
【００１９】
従って、モータコイル７の端末７ａをモータフレーム４に穿たれた小孔４ｂに通すと、モータコイル７の端末７ａが基板１１の小孔１１ａと挟着具１３の小孔１３ｃに通すことができ、モータコイル７の端末７ａを挟着具１３の二山状に隆起した谷状挟着部１３ｂに外れないようにしっかりと挟着すれば、モータコイル７の端末７ａと基板１１にプリント印刷された導電線１２とを電気的導通状態に接続できる。なお、小孔１３ｃは必ずしも設ける必要はなく、ただしその場合には、小孔１１ａに挟着具１３が被さらないように設ける。
【００２０】
この実施の態様は、モータコイル７のコイル端末７ａをモータ外部に導いて挟着具１３の谷状挟着部１３ｂを挟着することができるので、結線作業に必要なスペースは十分に確保できて、しかも、ハンダ付けやボンディングの必要がないから結線が迅速かつ簡単に行える。
この実施の形態は、結線が外付けになるので、結線機能付きプリント基板Ｂにハンダ１５を予め付けておらず、モータコイル７のコイル端末７ａを挟着具１３に挟着した後基板１１にプリント印刷された導電線１２の結線部１２ａにコイル端末７ａをハンダ付け、又はボンディングしても良い。
【００２１】
続いて、本願発明の第三の実施の形態を図３（ａ），（ｂ），（ｃ）を参照して説明する。
図３（ａ）に示すように、この実施の形態に係るスピンドルモータＭ３は、図１（ｂ）に示す結線機能付きプリント基板Ａに替えて、図３（ｂ）に示す結線機能付きプリント基板Ｃをモータフレーム４の上面に備えた点が図１に示す第一の実施の形態のスピンドルモータと相違している。
【００２２】
以下、この実施の形態のスピンドルモータの構成要素について、第一の実施の形態のスピンドルモータに比して、同一の構成要素に同一符号を付して説明は省略し、相違する構成要素についてのみ説明する。
図３（ｂ），（ｃ）に示すように、結線機能付きプリント基板Ｃは、円環部と直線部からなる虫メガネのフレーム形の基板１１に両端が結線部１２ａとなっている八本の導電線１２がプリント配線され、基板１１の円環部に位置する結線部１２ａの近傍に挟着具１６が貼着されている。該挟着具１６は、導電板材をプレス成形して小孔１６ａと該小孔１６ａの一側に二本の切り込み線が入れられ該二本の切り込み線間が反基板側に曲げられてなる舌片部１６ｂを有している。従って、モータコイル７のコイル端末７ａを挟着具１６の小孔１６ａに差し込んで舌片部１６ｂを平らになるように曲げを戻せば、舌片部１６ｂの先端が小孔１６ａの面積を縮小し、コイル端末７ａを挟着できる。挟着具１６の挟着力は図１に示す挟着具１３の挟着力よりも大きく、かつコイル端末７ａに食い込むように強力に挟着するので、モータコイル７の絶縁保護膜を破って挟着し、従って、挟着具１６がコイル端末７ａと電気的導通状態になる。
【００２３】
この実施の態様は、モータコイル７のコイル端末７ａを挟着具１６の小孔１６ａに差し込んで舌片部１６ｂを平らになるように曲げを戻すためのスペースはハンダ付けするために必要なスペースよりも薄い小空間で足りるから結線が迅速かつ簡単に行える。
続いて、本願発明の第四の実施の形態を図４（ａ），（ｂ），（ｃ）を参照して説明する。
【００２４】
図４（ａ）に示すように、この実施の形態に係るスピンドルモータＭ４は、図３（ｂ）に示す結線機能付きプリント基板Ｃに替えて、図４（ｂ）に示す結線機能付きプリント基板Ｄをモータフレーム４の下面に備えた点が図３に示す第三の実施の形態のスピンドルモータと相違している。
以下、この実施の形態のスピンドルモータの構成要素について、第三の実施の形態のスピンドルモータに比して、同一の構成要素に同一符号を付して説明は省略し、相違する構成要素についてのみ説明する。
【００２５】
図４（ａ）に示すように、結線機能付きプリント基板Ｄを貼着するため、モータフレーム４の下面に形成された凹部４ａに収容されている。図４（ｂ），（ｃ）に示すように、結線機能付きプリント基板Ｄは、円環部と直線部からなる虫メガネのフレーム形の基板１１に両端が結線部１２ａとなっている八本の導電線１２がプリント配線され、基板１１の円環部に位置する結線部１２ａの近傍に挟着具１６が貼着されている。該挟着具１６は、導電板材をプレス成形して小孔１６ａと該小孔１６ａの一側に二本の切り込み線が入れられ該二本の切り込み線間が反基板側に曲げられてなる舌片部１６ｂを有している。そして、基板１１には、挟着具１６の小孔１６ａに対応して小孔１１ａが設けられ、またモータフレーム４には基板１１の小孔１１ａに対応して小孔４ｂが設けられている。従って、モータコイル７のコイル端末７ａをモータフレーム４に設けられた小孔４ｂに通すと、モータコイル７の端末７ａが基板１１の小孔１１ａと挟着具１６の小孔１６ａに通すことができ、挟着具１６の舌片部１６ｂを平らになるように曲げを戻せば、舌片部１６ｂの先端が小孔１６ａの面積を縮小し、コイル端末７ａを挟着でき，挟着具１６がコイル端末７ａと電気的導通状態になる。
【００２６】
この実施の態様は、モータコイル７のコイル端末７ａをモータ外部に導いて挟着具１６に挟着することができるので、結線作業に必要なスペースは十分に確保できて、しかも、ハンダ付けやボンディングの必要がないから結線が迅速かつ簡単に行える。
この実施の形態は、結線が外付けになるので、結線機能付きプリント基板Ｄにハンダ１５を予め付けておらず、モータコイル７のコイル端末７ａを挟着具１６に挟着した後基板１１にプリント印刷された導電線１２の結線部１２ａにコイル端末７ａをハンダ付け、又はボンディングしても良い。
【００２７】
図２（ｂ）に示す結線機能付きプリント基板Ｂに替えて、及び図４（ｂ）に示す結線機能付きプリント基板Ｄに替えて、図５に示す結線機能付きプリント基板Ｅを採用することができる。この導電体固定機能付きプリント基板Ｅは、虫メガネのフレーム形の基板１１に両端が結線部１２ａとなっている八本の導電線１２がプリント配線され、基板１１の円環部に挟着具１７が貼着されている。該挟着具１７は、非導電性材料から円環状に形成されていて、基板１１にプリント印刷された導電線１２の結線部１２ａに被さらないように該結線部１２ａに対応する部分に小孔１７ａが設けられているとともに、各小孔１７ａの近傍に、図４（ｂ）に示す挟着具１６の小孔１６ａと舌片部１６ｂと同様の、小孔１７ｂと舌片部１７ｃが設けられており、挟着具１７の小孔１７ｂに対応して基板１１に小孔１１ａが設けられている。従って、図４（ａ）においてモータフレーム４の小孔４ｂに通されたコイル端末７ａをさらに小孔１１ａと１７ｂに通してから舌片部１７ｃを曲げが平らになるようにカシメ戻して該舌片部１７ｃでコイル端末７ａを強力に挟着してから、さらにコイル端末７ａを小孔１７ａ内に露出する結線部１２ａに近接してハンダ付けするか、舌片部１７ｃで挟着したコイル端末７ａの余分を切除して、該コイル端末７ａの末端と小孔１７ａ内に露出する結線部１２ａとをボンディングにより接続する。
【００２８】
なお、図４（ｂ）に示す挟着具１６の小孔１６ａと舌片部１６ｂと同様の、小孔１７ｂと舌片部１７ｃを設けることに替えて、図２（ｂ）に示す挟着具１３の谷状挟着部１３ｂと同様の、谷状挟着部を設けても良い。
図６は、回転駆動源に図１のスピンドルモータＭ１を採用した回転体装置を示す。この回転体装置は、ハードディスク装置であり、スピンドルモータＭ１のロータに、磁気ディスクまたは光ディスク等の被回転円盤Ｈを被着してなる。該回転体装置は、本願発明のスピンドルモータの機能・作用・効果を有する。
【００２９】
【発明の効果】
以上説明してきたように、本願発明のスピンドルモータ、及び回転体装置によれば、モータ組み立て時にモータコイルの端末とプリント基板にプリントされた導電線とを迅速かつ簡単に電気的導通状態にすることができ、また結線スペースが極めて小さくても迅速かつ簡単に結線状態にすることができる。
【図面の簡単な説明】
【図１】本願発明の第一の実施の形態に係るスピンドルモータに係り、（ａ）はスピンドルモータの縦断面図を示し、（ｂ）は（ａ）におけるＩb −Ｉb 断面図、（ｃ）はモータコイルとプリント基板の導電線との結線箇所の拡大断面図である。
【図２】本願発明の第二の実施の形態に係るスピンドルモータに係り、（ａ）はスピンドルモータの縦断面図を示し、（ｂ）は（ａ）におけるIIb − IIb断面図、（ｃ）はモータコイルとプリント基板の導電線との結線箇所の拡大断面図である。
【図３】本願発明の第三の実施の形態に係るスピンドルモータに係り、（ａ）はスピンドルモータの縦断面図を示し、（ｂ）は（ａ）におけるIIIb−IIIb断面図、（ｃ）と（ｄ）はモータコイルとプリント基板の導電線との結線箇所の拡大断面図である。
【図４】本願発明の第四の実施の形態に係るスピンドルモータに係り、（ａ）はスピンドルモータの縦断面図を示し、（ｂ）は（ａ）におけるIVb − IVb断面図、（ｃ）はモータコイルとプリント基板の導電線との結線箇所の拡大断面図である。
【図５】本願発明の第五の実施の形態に係り、スピンドルモータに装着される電導体固定機能付きプリント基板の詳細を示す正面図。
【図６】回転駆動源に図１のスピンドルモータを採用した回転体装置の概略斜視図
【符号の説明】
Ｍ１・・・スピンドルモータ
１ａ・・・スラスト軸受部
１ｂ・・・支持軸部
１ｃ・・・ラジアル軸受部
１・・・回転軸
２・・・ハウジング
３・・・押えリング
４・・・モータフレーム
５・・・ロータ
６・・・ステータ
７・・・モータコイル
７ａ・・・コイル端末
８・・・永久磁石
９・・・メディアチャック用磁石
１０・・・両面テープ
Ａ・・・結線機能付きプリント基板
１１・・・基板
１１ａ・・・小孔
１２・・・導電線
１２ａ・・・結線部
１３・・・挟着具
１３ａ・・・基部
１３ｂ・・・谷状挟着部
１３ｃ・・・小孔
１４・・・接着剤
１５・・・ハンダ
Ｍ２・・・スピンドルモータ
Ｂ・・・結線機能付きプリント基板
４ａ・・・モータフレームの凹部
４ｂ・・・小孔
Ｍ３・・・スピンドルモータ
Ｃ・・・結線機能付きプリント基板
１６・・・挟着具
１６ａ・・・小孔
１６ｂ・・・舌片部
Ｍ４・・・スピンドルモータ
Ｄ・・・結線機能付きプリント基板
１１ａ・・・小孔
Ｅ・・・結線機能付きプリント基板
１７・・・挟着具
１７ａ・・・小孔
１７ｂ・・・小孔
１７ｃ・・・舌片部
Ｈ・・・被回転円盤[0001]
BACKGROUND OF THE INVENTION
The invention of the present application can quickly and easily bring the terminal of the motor coil and the conductive wire printed on the printed circuit board into an electrically conductive state when the motor is assembled, and can be quickly and easily connected even if the connection space is extremely small. The present invention relates to a spindle motor and a rotating body device that can be used.
[0002]
[Prior art]
Microscopes are used because ultra-small electromechanical devices, such as HDD spindle motors (rotor diameter is about 15 mm), are assembled so that the end of the motor coil and the conductive wire of the printed circuit board are extremely small. Skilled workers are soldering by hand. For this reason, productivity is not improved and production cost is high.
[0003]
It is difficult to solder the motor coil terminal and the conductive wire connection part of the printed circuit board when assembling the spindle motor. The motor coil coil terminal is printed on the printed circuit board that is attached to the surface facing the motor coil of the motor frame. In a spindle motor that is connected to a conductive wire that has been assembled, soldering must be performed by placing a soldering iron under the stator inside the motor, and the coil wire diameter is extremely thin. This is because it is necessary to attach the solder to a very small size using a microscope, and the end of the motor coil cannot be stabilized to the soldering position at that time. Spindle module connected at assembly to conductive wire printed on printed circuit board affixed to the outer surface of the frame Since the coil wire diameter is extremely thin, it is necessary to attach the solder to a very small size using a microscope, and the motor coil terminal cannot be stabilized to the soldering position. It is.
[0004]
[Problems to be solved by the invention]
The present invention has been devised in view of the above-described points, and can quickly and easily bring the terminal of the motor coil and the conductive wire printed on the printed circuit board into an electrically conductive state when the motor is assembled. It is an object of the present invention to provide a spindle motor and a rotating body device that can be quickly and easily connected even if the size is extremely small.
[0005]
[Means for Solving the Problems]
The present invention relates to a spindle motor in which a coil terminal of a motor coil is connected to a conductive wire printed on a printed circuit board affixed to a surface facing the motor coil of the motor frame, and the printed circuit board includes the conductive wire. A sandwiching tool made of a conductive material is preliminarily attached in the vicinity of the connection portion of the printed circuit board, and the sandwiching tool and the connection portion of the conductive wire are connected to each other in an electrically conductive state. The surface opposite to the attached surface is affixed to the surface facing the motor coil of the motor frame by an adhesive, and the motor coil is sandwiched between the coil end of the motor coil and the motor coil. An object of the present invention is to provide a spindle motor characterized in that a conductive line printed on a printed circuit board is in an electrically conductive state.
[0006]
The present invention also relates to a spindle motor in which a coil terminal of a motor coil is passed through a small hole provided in a motor frame and is connected to a conductive wire printed on a printed circuit board pasted on the outer surface of the motor frame. A small hole through which the coil end of the motor coil passed through the small hole provided in the motor frame is provided, and a sandwiching tool made of a conductive material is provided in the vicinity of the connection portion of the conductive wire, and The clamping tool and the connecting portion of the conductive wire are connected in an electrically conductive state, and the surface of the printed circuit board opposite to the clamping tool is attached to the surface facing the motor coil of the motor frame with an adhesive. And the coil end of the motor coil passed through the small hole provided in the printed circuit board after passing the coil terminal of the motor coil passed through the small hole provided in the motor frame The by clamped is to the conductive lines printed on the motor coil and the printed circuit board to provide a spindle motor, which is a electrically conductive.
[0007]
The present invention also relates to a spindle motor in which a coil terminal of a motor coil is passed through a small hole provided in a motor frame and is connected to a conductive wire printed on a printed circuit board pasted on the outer surface of the motor frame. A small hole through which the coil end of the motor coil passed through the small hole provided in the motor frame is provided, and a sandwiching tool made of a conductive material is previously provided in the vicinity of the connection portion of the conductive wire, The surface of the substrate opposite to the sandwiching tool is affixed to the surface facing the motor coil of the motor frame by an adhesive, and the coil end of the motor coil passed through the small hole provided in the motor frame is printed. The coil terminal of the motor coil is clamped to the clamping tool after passing through the small hole provided in the substrate, and the clamping tool and the connection portion of the conductive wire are in an electrically conductive state. It is connected, or a connection portion between the motor coil terminals and the printed printed conductive lines on the substrate of the coil is to provide a spindle motor which is characterized in that it is connected.
[0008]
The present invention also relates to a spindle motor in which a coil terminal of a motor coil is passed through a small hole provided in a motor frame and is connected to a conductive wire printed on a printed circuit board pasted on the outer surface of the motor frame. In addition, a sandwiching tool is attached in the vicinity of the connection portion of the conductive wire, and the surface of the printed circuit board opposite to the sandwiching tool is pasted on the surface facing the motor coil of the motor frame by an adhesive. The coil terminal of the motor coil passed through the small hole provided in the motor frame is passed through the small hole provided in the printed circuit board, and then the coil terminal of the motor coil is clamped to the clamping tool. And providing a spindle motor characterized by being connected to a conductive wire printed on a printed circuit board by soldering or bonding. That.
[0009]
Another object of the present invention is to provide a rotating body device using the spindle motor as a drive source.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
A first embodiment of the present invention will be described with reference to FIGS. 1 (a), (b), and (c).
FIG. 1A shows a spindle motor according to an embodiment of the present invention. FIG. 1B shows a printed circuit board with a connection function attached to a spindle motor. FIG.1 (c) shows the connection state of the coil terminal of a motor coil, and the conductive wire of a printed circuit board with a connection function.
[0011]
The spindle motor M1 is an ultra-thin, ultra-compact spindle motor equipped with a fluid dynamic pressure bearing, and a coil terminal of a motor coil is electrically connected to a conductive wire of a printed circuit board provided in the motor. Yes.
The spindle motor M1 has a rotation having a support shaft portion 1b and a radial bearing portion 1c in which a radial dynamic pressure generating groove is formed in the peripheral surface at both ends of a thrust bearing portion 1a in which a thrust dynamic pressure generating groove is formed in both surfaces. The shaft 1, the housing 2, the presser ring 3, the motor frame 4 that supports the housing 2, the rotor 5 that is fitted and fixed to the support shaft portion 1 b of the rotating shaft 1, and the outer periphery of the housing 2 are press-fitted and fixed. A stator 6, a four-pole motor coil 7 provided in the stator 6, a permanent magnet 8 provided on the rotor 5, a media chuck magnet 9 fixed to the upper surface of the rotor 5, and a motor frame 4. A printed circuit board A with a connection function adhered to the upper surface by a double-sided tape 10 is provided. Lubricating oil is filled around the rotary shaft 1 and the coil terminal 7a of the motor coil 7 is connected with a connection function. It is connected to a cement board A.
[0012]
As shown in FIGS. 1 (b) and 1 (c), the printed circuit board A with a connection function includes a frame-shaped substrate 11 of a magnifying glass composed of an annular portion and a straight portion, and both ends are connected portions 12a. A conductive wire 12 is printed on the printed circuit board, and a sandwiching tool 13 is adhered with an adhesive 14 in the vicinity of each connection portion 12 a of the substrate 11. The sandwiching tool 13 is formed of a conductive material, and has a base portion 13a and a valley-like sandwiching portion 13b that protrudes in a mountain shape from the base portion 13a. A base portion 13 a of the sandwiching tool 13 and a connection portion 12 a of the conductive wire 12 are connected to an electrically conductive state by solder 15. Note that the number of poles and the number of lines are not limited.
[0013]
The substrate 11 is a hard substrate made of paper epoxy resin, bakelite, or glass epoxy resin. The substrate 11 may be a flexible substrate made of a heat-resistant film such as polyimide. In this case, the conductive wire 12 is printed and wired on one heat-resistant film, laminated with another heat-resistant film, and printed. If the connection portion at the end is exposed without being laminated, the durability of the conductive wire 12 can be ensured and an electrical short circuit can be avoided, and the clamping tool 13 can be moved to a position overlapping the conductive wire 12 in the vicinity of the connection portion 12a. Since sticking is possible, it is preferable.
[0014]
Instead of the solder 15, the base portion 13 a of the sandwiching tool 13 and the connection portion 12 a of the conductive wire 12 may be connected by bonding. Solder or bonding requires a mounting space, but if there is no mounting space at the mounting location, it is preferable to attach solder or bonding in advance. Further, when the sandwiching tool 13 is formed of a conductive material, a conductive adhesive is used as the adhesive 14 without soldering or bonding, and the adhesive 14 is connected to the connecting portion of the conductive wire 12. The clamping tool 13 may be bonded to the substrate 11 so as to overlap the end of 12a.
[0015]
If the clamping tool 13 attached to the board | substrate 11 is previously connected to the electrically conductive state 12 with respect to the conductive wire 12 printed and printed on the board | substrate 11 like the said structure, the terminal of the motor coil 7 which should be connected It is sufficient that 7 a is firmly clamped so as not to be disengaged from the valley-shaped sandwiching portion 13 b that is raised in the shape of two peaks of the sandwiching tool 13. When the terminal 7a of the motor coil 7 is covered with an insulating protective film, it is sandwiched after the insulating protective film is removed.
[0016]
This connection method is also applied when the sandwiching tool 13 is formed of a conductive material.
In this embodiment, the space necessary for clamping the coil terminal 7a of the motor coil 7 to the valley-like clamping part 13b of the clamping tool 13 is sufficient to allow the tweezers to be inserted from the horizontal direction and is soldered. Since the space is much thinner and smaller than the space required for the connection, the connection can be made quickly and easily.
[0017]
Next, a second embodiment of the present invention will be described with reference to FIGS. 2 (a), (b), and (c).
As shown in FIG. 2 (a), the spindle motor M2 according to this embodiment is replaced with a printed circuit board A having a wiring function shown in FIG. 2B instead of the printed board A with a wiring function shown in FIG. 1B. The point that B is provided on the lower surface of the motor frame 4 is different from the spindle motor of the first embodiment shown in FIG.
[0018]
Hereinafter, with respect to the components of the spindle motor of this embodiment, the same components are denoted by the same reference numerals as those of the spindle motor of the first embodiment, and the description thereof will be omitted. Only the different components will be described. explain.
As shown in FIG. 2A, the printed circuit board B with a connection function is accommodated in a recess 4 a formed on the lower surface of the motor frame 4 in order to stick the printed circuit board B. As shown in FIGS. 2B and 2C, the printed circuit board B with a connection function is provided with a small hole 13 c in the base portion 13 a of the clamping tool 13 and a small hole 11 a in the substrate 11. The holes 13c and 11a coincide with each other, and the motor frame 4 is also provided with a small hole 4b corresponding to the small hole 11a of the substrate 11.
[0019]
Accordingly, when the terminal 7 a of the motor coil 7 is passed through the small hole 4 b formed in the motor frame 4, the terminal 7 a of the motor coil 7 can be passed through the small hole 11 a of the substrate 11 and the small hole 13 c of the clamping tool 13. If the terminal 7a of the motor coil 7 is securely clamped so as not to be disengaged from the valley-shaped clamping part 13b that is raised in the shape of two peaks of the clamping tool 13, the terminal 7a of the motor coil 7 and the substrate 11 are printed. The conductive wire 12 can be connected to an electrically conductive state. Note that the small hole 13c is not necessarily provided, but in that case, the small hole 11a is provided so as not to cover the clamping tool 13.
[0020]
In this embodiment, since the coil terminal 7a of the motor coil 7 can be guided to the outside of the motor and the valley-shaped sandwiching portion 13b of the sandwiching tool 13 can be sandwiched, a sufficient space for the wiring work can be secured. Moreover, since there is no need for soldering or bonding, the connection can be made quickly and easily.
In this embodiment, since the connection is externally attached, the solder 15 is not attached in advance to the printed circuit board B with a connection function, and the coil terminal 7a of the motor coil 7 is sandwiched between the sandwiching tool 13 and then the substrate 11 The coil terminal 7a may be soldered or bonded to the connection portion 12a of the conductive wire 12 printed and printed.
[0021]
Next, a third embodiment of the present invention will be described with reference to FIGS. 3 (a), (b), and (c).
As shown in FIG. 3A, the spindle motor M3 according to this embodiment is replaced with a printed circuit board A having a connection function shown in FIG. 3B instead of the printed circuit board A with a connection function shown in FIG. The difference from the spindle motor of the first embodiment shown in FIG. 1 is that C is provided on the upper surface of the motor frame 4.
[0022]
Hereinafter, with respect to the components of the spindle motor of this embodiment, the same components are denoted by the same reference numerals as those of the spindle motor of the first embodiment, and the description thereof will be omitted. Only the different components will be described. explain.
As shown in FIGS. 3B and 3C, the printed circuit board C with a connection function has eight magnifying glass frame-shaped substrates 11 each having an annular portion and a straight portion, and both ends are connected portions 12a. The conductive wire 12 is printed and wired, and a clamping tool 16 is attached in the vicinity of the connection portion 12 a located in the annular portion of the substrate 11. The sandwiching tool 16 is formed by press-molding a conductive plate material, two small cutting lines 16a are formed on one side of the small hole 16a, and the gap between the two cutting lines is bent toward the non-substrate side. It has a tongue piece 16b. Therefore, if the coil terminal 7a of the motor coil 7 is inserted into the small hole 16a of the clamping tool 16 and the tongue piece 16b is bent back so as to be flat, the tip of the tongue piece 16b reduces the area of the small hole 16a. And the coil terminal 7a can be clamped. The clamping force of the clamping tool 16 is larger than the clamping force of the clamping tool 13 shown in FIG. 1 and is strongly clamped so as to bite into the coil terminal 7a, so that the insulating protective film of the motor coil 7 is broken and clamped. Therefore, the sandwiching tool 16 is in electrical continuity with the coil terminal 7a.
[0023]
In this embodiment, the space for inserting the coil end 7a of the motor coil 7 into the small hole 16a of the clamping tool 16 and returning the bending so that the tongue piece 16b becomes flat is the space necessary for soldering. Since a thinner space is sufficient, the connection can be made quickly and easily.
Next, a fourth embodiment of the present invention will be described with reference to FIGS. 4 (a), (b), and (c).
[0024]
As shown in FIG. 4 (a), the spindle motor M4 according to this embodiment is replaced with a printed circuit board with connection function shown in FIG. 4 (b) instead of the printed circuit board with connection function shown in FIG. 3 (b). The point that D is provided on the lower surface of the motor frame 4 is different from the spindle motor of the third embodiment shown in FIG.
Hereinafter, with respect to the components of the spindle motor of this embodiment, as compared with the spindle motor of the third embodiment, the same components are denoted by the same reference numerals, description thereof is omitted, and only different components are described. explain.
[0025]
As shown in FIG. 4A, the printed circuit board D with a connection function is accommodated in a recess 4 a formed on the lower surface of the motor frame 4 in order to adhere the printed circuit board D. As shown in FIGS. 4B and 4C, the printed circuit board D with a connection function has eight magnifying glass frame-shaped substrates 11 each having an annular portion and a straight portion, and both ends are connected portions 12a. The conductive wire 12 is printed and wired, and a clamping tool 16 is attached in the vicinity of the connection portion 12 a located in the annular portion of the substrate 11. The sandwiching tool 16 is formed by press-molding a conductive plate material, two small cutting lines 16a are formed on one side of the small hole 16a, and the gap between the two cutting lines is bent toward the non-substrate side. It has a tongue piece 16b. The substrate 11 is provided with a small hole 11a corresponding to the small hole 16a of the clamping tool 16, and the motor frame 4 is provided with a small hole 4b corresponding to the small hole 11a of the substrate 11. . Therefore, when the coil terminal 7 a of the motor coil 7 is passed through the small hole 4 b provided in the motor frame 4, the terminal 7 a of the motor coil 7 can be passed through the small hole 11 a of the substrate 11 and the small hole 16 a of the clamping tool 16. If the tongue piece 16b of the clamping tool 16 is bent back so as to be flat, the tip of the tongue piece 16b reduces the area of the small hole 16a, and the coil terminal 7a can be clamped. Is in electrical continuity with the coil terminal 7a.
[0026]
In this embodiment, since the coil terminal 7a of the motor coil 7 can be guided to the outside of the motor and can be clamped to the clamping tool 16, a sufficient space for wire connection work can be secured, and soldering or Since there is no need for bonding, wiring can be done quickly and easily.
In this embodiment, since the connection is externally attached, the solder 15 is not attached in advance to the printed circuit board D with a connection function, and the coil terminal 7a of the motor coil 7 is sandwiched between the sandwiching tool 16 and then the substrate 11 The coil terminal 7a may be soldered or bonded to the connection portion 12a of the conductive wire 12 printed and printed.
[0027]
Instead of the printed circuit board B with the connection function shown in FIG. 2B and the printed circuit board D with the connection function shown in FIG. 4B, the printed circuit board E with the connection function shown in FIG. 5 may be adopted. it can. In this printed circuit board E with a conductor fixing function, eight conductive wires 12 having connection portions 12a at both ends are printed on a frame-shaped substrate 11 of a magnifying glass, and sandwiched between the annular portions of the substrate 11 17 is affixed. The sandwiching tool 17 is formed in an annular shape from a non-conductive material, and is small in a portion corresponding to the connection portion 12a so as not to cover the connection portion 12a of the conductive wire 12 printed and printed on the substrate 11. A small hole 17b and a tongue piece portion 17c similar to the small hole 16a and the tongue piece portion 16b of the clamping tool 16 shown in FIG. 4B are provided in the vicinity of each small hole 17a. A small hole 11 a is provided in the substrate 11 corresponding to the small hole 17 b of the sandwiching tool 17. Therefore, in FIG. 4A, the coil terminal 7a passed through the small hole 4b of the motor frame 4 is further passed through the small holes 11a and 17b, and then the tongue piece portion 17c is crimped back so that the bending becomes flat. After the coil terminal 7a is strongly clamped by the piece 17c, the coil terminal 7a is further soldered close to the connection part 12a exposed in the small hole 17a, or is clamped by the tongue piece 17c. The excess of 7a is cut off, and the end of the coil terminal 7a and the connection part 12a exposed in the small hole 17a are connected by bonding.
[0028]
In addition, it replaces with providing the small hole 17b and the tongue piece part 17c similar to the small hole 16a and the tongue piece part 16b of the clamping tool 16 shown in FIG.4 (b), and is shown in FIG.2 (b). A valley-like sandwiching portion similar to the valley-like sandwiching portion 13b of the tool 13 may be provided.
FIG. 6 shows a rotating body device that employs the spindle motor M1 of FIG. 1 as a rotational drive source. This rotating body device is a hard disk device, and is formed by attaching a rotating disk H such as a magnetic disk or an optical disk to the rotor of a spindle motor M1. The rotating body device has the functions, operations, and effects of the spindle motor of the present invention.
[0029]
【The invention's effect】
As described above, according to the spindle motor and the rotating body device of the present invention, the terminal of the motor coil and the conductive wire printed on the printed circuit board can be quickly and easily electrically connected when the motor is assembled. In addition, even if the connection space is extremely small, the connection state can be quickly and easily achieved.
[Brief description of the drawings]
FIG. 1 relates to a spindle motor according to a first embodiment of the present invention. FIG. 1 (a) is a longitudinal sectional view of the spindle motor, FIG. 1 (b) is a sectional view taken along line Ib-Ib in FIG. These are the expanded sectional views of the connection location of the motor coil and the conductive wire of a printed circuit board.
FIGS. 2A and 2B relate to a spindle motor according to a second embodiment of the present invention, wherein FIG. 2A is a longitudinal sectional view of the spindle motor, FIG. 2B is a sectional view taken along line IIb-IIb in FIG. These are the expanded sectional views of the connection location of the motor coil and the conductive wire of a printed circuit board.
FIGS. 3A and 3B relate to a spindle motor according to a third embodiment of the present invention, wherein FIG. 3A is a longitudinal sectional view of the spindle motor, FIG. 3B is a sectional view taken along line IIIb-IIIb in FIG. And (d) is an enlarged cross-sectional view of a connection portion between a motor coil and a conductive wire of a printed board.
4A and 4B relate to a spindle motor according to a fourth embodiment of the present invention, wherein FIG. 4A is a longitudinal sectional view of the spindle motor, FIG. 4B is a sectional view taken along line IVb-IVb in FIG. These are the expanded sectional views of the connection location of the motor coil and the conductive wire of a printed circuit board.
FIG. 5 is a front view showing details of a printed circuit board with a conductor fixing function attached to a spindle motor according to a fifth embodiment of the present invention.
6 is a schematic perspective view of a rotating body device employing the spindle motor of FIG. 1 as a rotational drive source.
M1 ・・・ Spindle motor 1a ・・・ Thrust bearing portion 1b ・・・ Support shaft portion 1c ・・・ Radial bearing portion 1 ・・・ Rotary shaft 2 ・・・ Housing 3 ・・・ Presser ring 4 ・・・ Motor frame 5 ... Rotor 6 ... Stator 7 ... Motor coil 7a ... Coil terminal 8 ... Permanent magnet 9 ... Media chuck magnet 10 ... Double-sided tape A ... Print with connection function Substrate 11 ... substrate 11a ... small hole 12 ... conductive wire 12a ... connection part 13 ... clamping tool 13a ... base part 13b ... valley-like clamping part 13c ... small Hole 14 ... Adhesive 15 ... Solder M2 ... Spindle motor B ... Printed circuit board 4a with connection function ... Recess 4b of motor frame ... Small hole M3 ... Spindle motor C ...・ With wiring function Printed circuit board 16 ... clamping tool 16a ... small hole 16b ... tongue piece M4 ... spindle motor D ... printed circuit board 11a with connection function ... small hole E ... with connection function Printed circuit board 17 ... clamping tool 17a ... small hole 17b ... small hole 17c ... tongue piece H ... rotated disk

Claims

In the spindle motor where the coil terminal of the motor coil is connected to the conductive wire printed on the printed circuit board pasted on the surface facing the motor coil of the motor frame,
The printed circuit board in the vicinity of the connection portion of the conductive wire, Ri name of a conductive material, clamping tool having a tongue portion which at least two score lines is placed around the stoma and the small hole in advance And the connecting part of the conductive wire is connected in an electrically conductive state, and the surface of the printed circuit board opposite to the surface where the sandwiching tool is attached is bonded to the motor frame with an adhesive. It is pasted on the surface facing the motor coil,
A spindle motor, wherein a motor coil and a conductive wire printed on a printed circuit board are brought into an electrically conductive state by sandwiching a coil terminal of the motor coil to the clamping tool.

In a spindle motor in which a coil terminal of a motor coil is passed through a small hole provided in a motor frame and connected to a conductive wire printed on a printed circuit board pasted on the outer surface of the motor frame,
The printed circuit board is a small hole is provided through a coil terminal of the motor coil through the small hole provided in the motor frame, in the vicinity of the connection portion of the conductive wire, Ri name of a conductive material, a small hole and said A sandwiching tool having a tongue piece portion in which at least two cut lines are inserted around the small hole is attached in advance, and the sandwiching tool and the connection portion of the conductive wire are connected in an electrically conductive state. are affixed to the outer surface of the motor frame by the surface opposite the clamping device of the printed circuit board is an adhesive,
By passing the coil terminal of the motor coil passed through the small hole provided in the motor frame through the small hole provided in the printed circuit board, and sandwiching the coil terminal of the motor coil in the clamping tool, A spindle motor, wherein a conductive wire printed on a printed circuit board is in an electrically conductive state.

In a spindle motor in which a coil terminal of a motor coil is passed through a small hole provided in a motor frame and connected to a conductive wire printed on a printed circuit board pasted on the outer surface of the motor frame,
The printed circuit board is provided with a small hole through which a coil terminal of a motor coil passed through a small hole provided in the motor frame, and at least around the small hole and the periphery of the small hole in the vicinity of the connection portion of the conductive wire. clamping device having two score lines are tongues encased is attached in advance, the surface opposite the clamping device of the printed circuit board are affixed to the outer surface of the motor frame by the adhesive ,
Said motor frame coil terminal of the motor coil through the small holes provided in and pinched through the small hole provided in the clamping device, further wherein the motor coil terminal and the printed circuit board to the printed conductive wire of the coil A spindle motor characterized by being connected to a wire connecting portion.

In a spindle motor in which a coil terminal of a motor coil is passed through a small hole provided in a motor frame and connected to a conductive wire printed on a printed circuit board pasted on the outer surface of the motor frame,
The printed circuit board is preliminarily provided with a pinching tool having a small hole and a tongue piece portion into which at least two cut lines are formed around the small hole in the vicinity of the connection portion of the conductive wire. opposite surface and clamping tool are affixed to the outer surface of the motor frame by an adhesive,
A coil terminal of a motor coil passed through a small hole provided in the motor frame is clamped through the small hole provided in a clamping tool, and the coil terminal is further attached to a conductive wire printed on a printed board. A spindle motor characterized by being connected by soldering or bonding.

5. A rotating body device using the spindle motor according to claim 1 as a rotational drive source.