JP3661369B2 - Vibration type linear actuator - Google Patents

Vibration type linear actuator Download PDF

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Publication number
JP3661369B2
JP3661369B2 JP29472097A JP29472097A JP3661369B2 JP 3661369 B2 JP3661369 B2 JP 3661369B2 JP 29472097 A JP29472097 A JP 29472097A JP 29472097 A JP29472097 A JP 29472097A JP 3661369 B2 JP3661369 B2 JP 3661369B2
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Prior art keywords
spring
fulcrum
mover
linear actuator
vibration type
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JP29472097A
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JPH11136920A (en
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良 本橋
宏明 清水
文朗 谷口
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Panasonic Electric Works Co Ltd
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Matsushita Electric Works Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、往復式電気かみそり等に利用できる振動型リニアアクチュエータに関するものである。
【0002】
【従来の技術】
従来から振動型リニアアクチュエータを用いた往復式電気かみそりとして、特開平7ー265559号公報が知られている。
このものは、固定子に対して可動子を往復動させるための往復運動式の電動機において、可動子と固定子を非接触構造にし、運動方向にのみ変位可能で運動方向以外には変位不能の連結体で可動子を固定部に堅持して可動子を固定子に対して非接触状態に保持したものである。そして、このように連結体で固定子に対して可動子を非接触状態に保持することで、可動子を非接触で、運動することができて、摺動部が無くなり、高速で動かすことができ、摺動部がないので、長寿命化が図れるようにしている。
【0003】
しかしながら、上記の従来例にあっては、単一の連結体により構成してあるため、このタイプでは単一の連結体が振子運動した場合、可動子の上下方向に移動する移動量が大きく、この結果、上下方向の振動が発生するという問題がある。
【0004】
【発明が解決しようとする課題】
本発明は上記の従来例の問題点に鑑みて発明したものであって、可動子の上下方向の振動を抑えることができる振動型リニアアクチュエータを提供することを課題とするものである。
【0005】
【課題を解決するための手段】
上記従来例の問題点を解決して本発明の目的を達成するため、本発明の振動型リニアアクチュエータは、固定子1に対して可動子2を往復動させるための往復運動式の電動機であって、運動方向にのみ変位可能で運動方向以外には変位不能の連結体13で可動子2を固定部に堅持して可動子2と固定子1とを非接触構造にし、この連結体13は少なくとも一つの支点部50を持ち、支点部50を境にして両側に取付け部51を備え、一方の取付け部51に固定部を、他方の取付け部51に可動子2を取付けて可動子2を固定子1に対して非接触状態に保持すると共に、可動子2の移動により可動子2に取付けた取付け部51が運動すると支点部50を支点にして固定部に取付けた方の取付け部51が上記可動子2に取付けた取付け部51の運動方向と逆方向に運動するように構成して成ることを特徴とするものである。このような構成とすることで、連結体13の支点部50を境にして両側の取付け部51が互いに逆方向に運動するものであり、この場合、つまり、一方の取付け部51が振子運動すると、この振子運動した一方の取付け部51の非固定端である支点部50を支点にして他方の取付け部51が振子運動し、互いの振子運動がお互いに逆方向であるため、両側の取付け部の運動方向の変位が少なく、全体として可動子2の上下方向の振動を抑えることができるものである。
【0006】
また、連結体13が支点部を境にして両取付け部を180°逆方向に延設して構成してあることが好ましい。このような構成とすることで、連結体13の上下長さを短くすることができるものである。
また、連結体13が板ばねからなることが好ましい。このような構成とすることで、連結体13を可動子2の振動周波数を決定する際における固有振動数を求めるためのばね定数の項として利用することができるものである。
【0007】
また、連結体13が薄い板ばねを複数枚重ね合わせて構成してあることが好ましい。このような構成とすることで、上記可動子2の振動周波数を決定する際における固有振動数を求めるためのばね定数の項を調整できるとともに非運動方向の動きに対して剛性を持たせることができるものである。
また、連結体13が固定子1に蝶番により回動自在に取付けられる変位不能の板体と、固定部に蝶番により回動自在に取付けられる変位不能の板体と、両板体を支点部を構成する蝶番を境にして回動自在に連結して構成してあることが好ましい。このような構成とすることで、非運動方向の剛性が非常に強くなるものである。
【0008】
また、連結体13が支点部を境に第1ばね部と第2ばね部とから構成してあることが好ましい。このような構成とすることで、単一ばねで構成するよりも各ばね部の長さが短くてよいものである。
また、連結体13の第1ばね部と第2ばね部との長さが略同一であることが好ましい。このような構成とすることで、可動子2の上下動きを無くし、上下方向の振動が無くなるものである。
【0009】
また、連結体13が一方のばね部の隣りに他方のばね部が隣接して配置され、両ばね部の端部同士が支点部において連続していることが好ましい。このような構成とすることで、連結体13の構成を簡略化できることになる。
また、連結体13が環状をした一方のばね部と、該環状をした一方のばね部の内部に他方のばね部が位置し、この他方のばね部の一端部が一方の環状をしたばね部の一部と連続して該連続部分が支点部となっていることが好ましい。このような構成とすることで、リニアアクチュエータの厚み(前後)方向における連結体の剛性が上がるものである。
【0010】
【発明の実施の形態】
以下本発明を添付図面に示す実施形態に基づいて詳述する。図1には本発明の振動型リニアアクチュエータである電動機Aを駆動源として用いている往復式電気かみそりの要部の正面断面図を示し、電動機Aは電気かみそり本体B内に組み込んである。図2には電動機A及び内刃体3の組立状態の斜視図を示し、図3には電動機Aの分解斜視図を示している。
【0011】
電動機Aは固定子1に対して可動子2を往復動させるための往復運動式のものである。可動子2は永久磁石8とヨーク9とこれらを一体化する骨組み部材10とで構成してある。ヨーク9は磁性材料であって永久磁石8が接着してある。固定子1は磁性材料の焼結体や磁性材料の鉄板を積層したものに巻線11を施した電磁石により構成してある。電磁石により構成した固定子1は可動子2に設けた永久磁石8とギャップ12を隔てて面対向している。
【0012】
13は可動子2を固定子1に対して非接触状態に保持して上記ギャップ12を確保するための連結体であり、連結体13はばね鋼あるいは成形品からなる板ばねである。連結体13は伸びの少ない材料からなり、上記ギャップ12を保持するものである。連結体13は少なくとも一つの支点部50を持ち、支点部50を境にして両側に取付け部51を備え、一方の取付け部51を固定部であるシャーシ14にねじ具15又は溶接により固定してあり、他方の取付け部51を可動子2にねじ具15又は溶接により固着してある。図2、図3に示す実施形態においては、板ばねよりなる連結体13に切り欠きを設けることで固定部であるシャーシ14と一つの可動子2とを連結する連結体13に支点部50を境にして2つの取付け部51となる第1ばね部53aと第2ばね部53bとが設けてある。図2、図3に示す実施形態においては、可動子2が2つ設けてあり、このため、各可動子2を固定部であるシャーシ14に連結して支持するために2つの連結体13があるが、この2つの連結体13は連設部54により連設してある。しかしながら、連設部54で連設することなく2つの連結体13を別体として分離したものであってもよい。連設部54で連設したものは2つの連結体13を一度の打抜きで同時に形成することができる。連結体13は支点部50を境にして2つの取付け部51が180°逆方向に延設してある(つまり、支点部50を境にして一つの取付け部51の延長線上に他の一つの取付け部51を延設するのではなく、支点部50を境にして一つの取付け部51の延長線とは180°逆方向に延設してある)。
【0013】
固定子1を構成する電磁石はねじ具14によりシャーシ7に固定してある。この実施例では図2に示すように可動子2は固定部を構成するシャーシ7から連結体13を構成する板ばねにより吊り下げられた構成となっている。ここで、固定子1である電磁石の電流方向を交番にすることで、可動子2に取付けた永久磁石8が往復方向に移動するようになっていていわゆるリニアモータと称される往復運動式の電動機Aを構成しており、この往復運動式の電動機Aは上記のように可動子2、固定子1が連結体13、シャーシ7を介して位置固定されてブロック化してある。
【0014】
尚、連結体13を構成するばね板を薄板を複数枚重ね合わせて構成してもよい。この場合、薄板にすることで板金の応力を低減することができる。
尚、固定子1をシャーシ7に固定せず、可動子2、連結体13、シャーシ7のブロックとは別として固定子1をかみそり本体Bのハウジングに固定するようにしてもよい。
【0015】
可動子2は添付図面に示す実施例では複数個設けてあるが可動子2は1個でもよい。可動子2には駆動子17が設けてあり、駆動子17には内刃を有する内刃体3を上下移動自在に取付けてあって、内刃体3は押し上げばねにより上方に弾性的に押し上げられていて内刃体3の内刃を外刃21に弾接している。
本実施形態の電動機Aを駆動源として用いた往復式電気かみそりにおいて駆動周波数は系の固有振動数により決まる。したがって、この場合は、可動子2と駆動子17と内刃体3の合計重量Mと連結体13を構成する板ばねのばね定数Kbと磁石の吸引力によるばね定数成分Kmとの合計のばね定数Kから、周波数f=(1/2π)・(K/M)1/2 が決定される。
【0016】
しかして、固定子1である電磁石の電流方向を交番にすることで、可動子2が往復方向に移動するのであるが、可動子2が往復方向に移動すると、連結体13は支点部50を境にして両側に第1ばね部53aを構成する取付け部51と第2ばね部53bを構成する取付け部51とを備え、一方の取付け部に固定部を、他方の取付け部に可動子2を取付けて可動子2を固定子1に取付けているので、連結体13の支点部50を境にして一方の取付け部51を構成する第1ばね部53aと、他方の取付け部51を構成する第2ばね部53bが運動することになる。この場合、第2ばね部53bが振子運動すると、この振子運動した第2ばね部53bの非固定端である支点部50を支点にして第1ばね部53aが振子運動する。このように振子運動がお互いに逆方向であるため全体として可動子2の上下動が無くなるものである。また、従来のように、一つのもので板ばねを構成する場合と比べて、各ばね部53a、53bの変位は半分でよくて、ばねの長さも短縮できるものである。
【0017】
この場合、第1ばね部53aと第2ばね部53bとの長さが略同じであると、可動子2の上下移動をゼロにできるものである。
ここで、板ばねよりなる連結体13に切り欠きを設けて固定部であるシャーシ14と一つの可動子2とを連結する連結体13に支点部50を境にして2つの取付け部51となる第1ばね部53aと第2ばね部53bとを設けるに当たり、ばね板の打抜きにより連結体13を形成するのであるが、この場合、図2、図3に示す実施形態においては、一方のばね部53aの隣りに他方のばね部53bが切り欠きを介して隣接して配置され、両ばね部53a、53bの端部同士が支点部50において連続している。このような構成とすると、切り欠きを介してばね部53aとばね部53bとを隣接させると共に支点部50部分に連続させるという簡単な構成で簡略な連結体13を得ることができるものである。
【0018】
図4、図5には本発明の他の実施形態が示してあり、本実施形態においては、連結体13が環状(実施形態においては矩形環状)をした一方のばね部53aと、該環状をした一方のばね部53aの内部に他方のばね部53bが位置し、この他方のばね部53bの一端部が一方の環状をしたばね部53aの一部と連続していてこの連続部分が支点部50となっている例である。
【0019】
このものにおいては、一方の環状のばね部53aの内部に他方のばね部53bが位置しているので、連結体13のねじれに対して強いものであり、電動機Aの厚み方向(前後方向)における連結体13の剛性が上がるものである。
次に、図6に基づいて本発明の他の実施形態につき説明する。この実施形態においては、連結体13が固定子1に蝶番13cにより回動自在に取付けられる変位不能の板体13aと、固定部に蝶番13dにより回動自在に取付けられる変位不能の板体13bと、両板体13aを支点部50構成する蝶番13eを境にして回動自在に連結して構成してある。そして、上記変位不能な2つの板体13a、13b、蝶番13c、蝶番13d、蝶番13eとよりなる蝶番機構の連結体13は運動方向にのみ変位可能で、ギャップ12を保持している。この時のばね定数K=Km(磁石の吸引力によるばね定数)となる。この実施形態においては、非運動方向の剛性が非常に強くなる。なお、この実施形態においても、図6のように一方の板体13aの隣りに他方の板体13aを隣接させて、支点部50となる蝶番13eに両板体13aの他端部をそれぞれ回動自在に連結するように配置する場合と、図示は省略しているが、一方の板体13aを環状とし、この環状の一方の板体13aの一端部を蝶番13cで固定部又は可動子2の一方に取付け、環状をした一方の板体13a内に他方の板体13bを配置し、他方の板体13bの一端部蝶番13dにより可動子2又は固定部の他方に取付け、他方の板体13bの他端部を環状の板体13aの他端部に支点部50となる蝶番13eにより回動自在に取付ける構成とする場合とがある。
【0020】
次に、図7、図8に基づいて本発明の更に他の実施形態を説明する。すなわち、前述の各実施形態においては、連結体13が固定部から可動子2を吊り下げるように構成したものであるが、図7、図8に示す実施形態においては、連結体13により固定部から可動子2を持ち上げるように構成したものである。すなわち、図7、図8に示す実施形態においては、固定部となるシャーシ7から連結体13により可動子2を持ち上げる構造となっている。ここで、連結体13は板ばねにより構成してあり、可動子2及びシャーシ7に溶接してある。このように連結体13により固定部から可動子2を持ち上げるように構成したものも、前述の連結体13により固定部から可動子2を吊り上げるように構成したものと同じ効果を有している。なお、図7に示すものは連結体13が環状(実施形態においては矩形環状)をした一方のばね部53aと、該環状をした一方のばね部53aの内部に他方のばね部53bが位置し、この他方のばね部53bの一端部が一方の環状をしたばね部53aの一部と連続していてこの連続部分が支点部50となっている例である。また、図8に示すものは、一方のばね部53aの隣りに他方のばね部53bが切り欠きを介して隣接して配置され、両ばね部53a、53bの端部同士が支点部50において連続している例である。
【0021】
次に、図9、図10に基づいて本発明の更に他の実施形態を説明する。この実施形態においては、連結体13が固定部より伸びて可動子2を側面から支持するように構成したものである。すなわち固定部を構成するシャーシ7から側方に板ばねよりなる連結体13が伸びて可動子2を側面から支持するようになっている。連結体13は可動子2及びシャーシ7に溶接して固着してある。この実施形態においては、可動子2の上下方向の変位がなくなるものである。なお、図10に示すものは連結体13が環状(実施形態においては矩形環状)をした一方のばね部53aと、該環状をした一方のばね部53aの内部に他方のばね部53bが位置し、この他方のばね部53bの一端部が一方の環状をしたばね部53aの一部と連続していてこの連続部分が支点部50となっている例である。また、図9に示すものは、一方のばね部53aの隣りに他方のばね部53bが切り欠きを介して隣接して配置され、両ばね部53a、53bの端部同士が支点部50において連続している例である。
【0022】
【発明の効果】
本発明の請求項1記載の発明にあっては、固定子に対して可動子を往復動させるための往復運動式の電動機であって、運動方向にのみ変位可能で運動方向以外には変位不能の連結体で可動子を固定部に堅持して可動子と固定子とを非接触構造にし、この連結体は少なくとも一つの支点部を持ち、支点部を境にして両側に取付け部を備え、一方の取付け部に固定部を、他方の取付け部に可動子を取付けて可動子を固定子に対して非接触状態に保持してあるので、可動子を非接触で運動することができて、摺動部が無くなり高速で動かすことができ、摺動部がないので長寿命で騒音も小さのは勿論のこと、可動子の移動により可動子に取付けた取付け部が運動すると支点部を支点にして固定部に取付けた方の取付け部が上記可動子に取付けた取付け部の運動方向と逆方向に運動するように構成してあるので、つまり、連結体の支点部を境にして両側の取付け部が互いに反対方向に運動するため、両側の取付け部の運動方向の変位が少なく、可動子の上下方向に移動する量を少なくして、全体として可動子の上下方向の振動の発生を抑制することができるものである。
【0023】
また、請求項2記載の発明にあっては、上記請求項1記載の発明の効果に加えて、連結体が支点部を境にして両取付け部を180°逆方向に延設して構成してあるので、連結体の長さが短くてよいものである。
また、請求項3記載の発明にあっては、上記請求項1記載の発明の効果に加えて、連結体が板ばねからなるので、連結体を可動子の振動周波数を決定する際における固有振動数を求めるためのばね定数の項として利用することができるものである。
【0024】
また、請求項4記載の発明にあっては、上記請求項1記載の発明の効果に加えて、連結体が薄い板ばねを複数枚重ね合わせて構成してあるので、上記ばね定数の項の調整ができると共に、非運動方向に対する剛性を持たせることができて、非運動方向への変位を防止できるものである。
また、請求項5記載の発明にあっては、上記請求項1記載の発明の効果に加えて、連結体が固定子に蝶番により回動自在に取付けられる変位不能の板体と、固定部に蝶番により回動自在に取付けられる変位不能の板体と、両板体を支点部を構成する蝶番を境にして回動自在に連結して構成してあるので、非運動方向の剛性が非常に強く、非運動方向への変位を防止できるものである。
【0025】
また、請求項6記載の発明にあっては、上記請求項1記載の発明の効果に加えて、連結体が支点部を境に第1ばね部と第2ばね部とから構成してあるので、単一ばねで構成するよりも各ばね部の長さが短くてよいものである。
また、請求項7記載の発明にあっては、上記請求項1記載の発明の効果に加えて、連結体の第1ばね部と第2ばね部との長さが略同一であるので、可動子の上下動をできるだけ無くすことができるものである。
【0026】
また、請求項8記載の発明にあっては、上記請求項3又は請求項4記載の発明の効果に加えて、連結体が一方のばね部の隣りに他方のばね部が隣接して配置され、両ばね部の端部同士が支点部において連続しているので、連結体の構成を簡略化できるものである。
また、請求項9記載の発明にあっては、上記請求項3又は請求項4記載の発明の効果に加えて、連結体が環状をした一方のばね部と、該環状をした一方のばね部の内部に他方のばね部が位置し、この他方のばね部の一端部が一方の環状をしたばね部の一部と連続して該連続部分が支点部となっているので、電動機の厚み方向(前後方向)における連結体の剛性が向上し、電動機の厚み方向の変位を防止できるものである。
【図面の簡単な説明】
【図1】本発明の電動機を使用した往復式電気かみそりの要部の正面断面図である。
【図2】同上の往復運動式の電動機及び内刃体の組立状態の斜視図である。
【図3】同上の往復運動式の電動機の分解斜視図である。
【図4】本発明の他の実施例の往復運動式の電動機及び内刃体の組立状態の斜視図である。
【図5】同上の往復運動式の電動機の分解斜視図である。
【図6】本発明の更に他の実施例の往復運動式の電動機及び内刃体の組立状態の斜視図である。
【図7】本発明の更に他の実施例の往復運動式の電動機及び内刃体の組立状態の斜視図である。
【図8】本発明の更に他の実施例の往復運動式の電動機及び内刃体の組立状態の斜視図である。
【図9】本発明の更に他の実施例の往復運動式の電動機及び内刃体の組立状態の斜視図である。
【図10】本発明の更に他の実施例の往復運動式の電動機及び内刃体の組立状態の斜視図である。
【符号の説明】
A 電動機
1 固定子
2 可動子
3 内刃体
13 連結体
50 支点部
51 取付け部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vibration type linear actuator that can be used for a reciprocating electric shaver or the like.
[0002]
[Prior art]
Japanese Patent Laid-Open No. 7-265559 is known as a reciprocating electric shaver using a vibration type linear actuator.
This is a reciprocating motor for reciprocating the mover with respect to the stator, and the mover and the stator have a non-contact structure and can be displaced only in the movement direction and not in the movement direction. In this connection body, the mover is firmly fixed to the fixed part and the mover is held in a non-contact state with respect to the stator. And by holding the mover in a non-contact state with respect to the stator with the connecting body in this way, the mover can be moved in a non-contact manner, the sliding part is eliminated, and it can be moved at high speed. In addition, since there are no sliding parts, the life can be extended.
[0003]
However, in the above conventional example, since it is configured by a single connecting body, in this type, when the single connecting body performs a pendulum motion, the moving amount of the mover in the vertical direction is large. As a result, there is a problem that vertical vibration occurs.
[0004]
[Problems to be solved by the invention]
The present invention was invented in view of the problems of the above-described conventional example, and an object of the present invention is to provide a vibration type linear actuator that can suppress vibration in the vertical direction of the mover.
[0005]
[Means for Solving the Problems]
In order to solve the problems of the conventional example and achieve the object of the present invention, the vibration type linear actuator of the present invention is a reciprocating motor for reciprocating the movable element 2 with respect to the stator 1. Thus, the movable body 2 is fixed to the fixed portion by the connecting body 13 that can be displaced only in the movement direction and cannot be displaced in any direction other than the movement direction, thereby making the movable body 2 and the stator 1 non-contact structure. It has at least one fulcrum 50, a mounting portion 51 on both sides with a fulcrum 50 as a boundary, the fixing portion on one of the mounting portion 51, the movable element 2 is attached to the movable element 2 to the other attachment portion 51 While holding the stator 1 in a non-contact state, and when the attachment portion 51 attached to the mover 2 moves due to the movement of the mover 2, the attachment portion 51 attached to the fixed portion with the fulcrum portion 50 as a fulcrum is provided. Operation of the attachment portion 51 attached to the mover 2 It is characterized in that formed by configured to move in a direction opposite to the direction. By adopting such a configuration, the attachment parts 51 on both sides move in opposite directions with respect to the fulcrum part 50 of the coupling body 13. In this case, that is, when one attachment part 51 moves in a pendulum manner. Since the other mounting portion 51 performs pendulum motion with the fulcrum portion 50 being the non-fixed end of the one mounting portion 51 that has undergone pendulum movement as the fulcrum, and the mutual pendulum motion is opposite to each other, Therefore, the vertical movement of the mover 2 can be suppressed.
[0006]
Moreover, it is preferable that the connection body 13 is constituted by extending both attachment portions in the opposite direction by 180 ° with the fulcrum portion as a boundary. By setting it as such a structure, the up-down length of the connection body 13 can be shortened.
Moreover, it is preferable that the connection body 13 consists of a leaf | plate spring. With such a configuration, the coupling body 13 can be used as a term of a spring constant for obtaining the natural frequency when determining the vibration frequency of the mover 2.
[0007]
Moreover, it is preferable that the connection body 13 is configured by overlapping a plurality of thin leaf springs. By adopting such a configuration, it is possible to adjust the term of the spring constant for obtaining the natural frequency when determining the vibration frequency of the mover 2 and to give rigidity to the motion in the non-motion direction. It can be done.
Further, a non-displaceable plate body in which the connecting body 13 is rotatably attached to the stator 1 by a hinge, a non-displaceable plate body that is rotatably attached to the fixed part by a hinge, and both plate bodies are provided with fulcrums. It is preferable that the hinges are configured to be pivotably connected with respect to the hinges. By adopting such a configuration, the rigidity in the non-motion direction becomes very strong.
[0008]
Moreover, it is preferable that the connection body 13 is comprised from the 1st spring part and the 2nd spring part on the boundary. By setting it as such a structure, the length of each spring part may be shorter than it comprises with a single spring.
Moreover, it is preferable that the length of the 1st spring part of the connection body 13 and a 2nd spring part is substantially the same. By adopting such a configuration, the movable element 2 is prevented from moving up and down, and vibrations in the vertical direction are eliminated.
[0009]
Moreover, it is preferable that the connection body 13 is arrange | positioned adjacent to one spring part and the other spring part, and the edge parts of both spring parts are continuing in the fulcrum part. By setting it as such a structure, the structure of the coupling body 13 can be simplified.
In addition, one spring portion in which the connecting body 13 has an annular shape, and the other spring portion is positioned inside the one annular spring portion, and one end portion of the other spring portion has one annular shape. It is preferable that this continuous part becomes a fulcrum part continuously with a part of the above. With such a configuration, the rigidity of the coupling body in the thickness (front-rear) direction of the linear actuator increases.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings. FIG. 1 shows a front sectional view of a main part of a reciprocating electric shaver using the electric motor A which is a vibration type linear actuator of the present invention as a drive source. The electric motor A is incorporated in an electric shaver body B. FIG. 2 shows a perspective view of the assembled state of the electric motor A and the inner blade body 3, and FIG. 3 shows an exploded perspective view of the electric motor A.
[0011]
The electric motor A is of a reciprocating motion type for reciprocating the movable element 2 with respect to the stator 1. The mover 2 includes a permanent magnet 8, a yoke 9, and a skeleton member 10 that integrates them. The yoke 9 is a magnetic material and has a permanent magnet 8 bonded thereto. The stator 1 is composed of an electromagnet in which a winding 11 is formed on a laminate of a sintered magnetic material or an iron plate of magnetic material. The stator 1 composed of an electromagnet faces the permanent magnet 8 provided on the mover 2 with a gap 12 therebetween.
[0012]
Reference numeral 13 denotes a connecting body for holding the mover 2 in a non-contact state with respect to the stator 1 and securing the gap 12. The connecting body 13 is a leaf spring made of spring steel or a molded product. The connecting body 13 is made of a material with little elongation, and holds the gap 12. The connecting body 13 has at least one fulcrum part 50 and includes attachment parts 51 on both sides of the fulcrum part 50 as a boundary. One attachment part 51 is fixed to the chassis 14 as a fixing part by a screw 15 or welding. The other mounting portion 51 is fixed to the mover 2 by the screw 15 or welding. In the embodiment shown in FIG. 2 and FIG. 3, the fulcrum part 50 is provided on the connecting body 13 that connects the chassis 14, which is a fixed part, and one movable element 2 by providing a cutout in the connecting body 13 made of a leaf spring. A first spring portion 53a and a second spring portion 53b are provided as two attachment portions 51 at the boundary. In the embodiment shown in FIGS. 2 and 3, two movers 2 are provided. For this reason, in order to connect and support each mover 2 to a chassis 14 which is a fixed portion, two connecting bodies 13 are provided. However, the two connecting bodies 13 are connected by the connecting portion 54. However, the two connecting bodies 13 may be separated as separate bodies without being connected at the connecting portion 54. In the case where the connecting portions 54 are continuously provided, the two connecting bodies 13 can be simultaneously formed by one punching. In the connecting body 13, two attachment portions 51 are extended in the opposite direction by 180 ° with the fulcrum portion 50 as a boundary (that is, another attachment line 51 extends on the extension line of one attachment portion 51 with the fulcrum portion 50 as a boundary. Rather than extending the mounting portion 51, the mounting portion 51 extends 180 degrees opposite to the extension line of one mounting portion 51 with the fulcrum portion 50 as a boundary.
[0013]
The electromagnet constituting the stator 1 is fixed to the chassis 7 by a screw tool 14. In this embodiment, as shown in FIG. 2, the mover 2 is suspended from the chassis 7 constituting the fixed portion by the leaf spring constituting the coupling body 13. Here, by making the current direction of the electromagnet which is the stator 1 alternate, the permanent magnet 8 attached to the mover 2 moves in the reciprocating direction, and is a reciprocating motion type so-called linear motor. The electric motor A is configured, and the reciprocating electric motor A is configured such that the movable element 2 and the stator 1 are fixed in position via the coupling body 13 and the chassis 7 as described above.
[0014]
In addition, you may comprise the spring board which comprises the connection body 13 by laminating | stacking several thin plates. In this case, the stress of the sheet metal can be reduced by using a thin plate.
Instead of fixing the stator 1 to the chassis 7, the stator 1 may be fixed to the housing of the razor main body B separately from the movable element 2, the coupling body 13, and the block of the chassis 7.
[0015]
In the embodiment shown in the accompanying drawings, a plurality of movers 2 are provided, but one mover 2 may be provided. The movable element 2 is provided with a driving element 17. An inner blade body 3 having an inner blade is attached to the driving element 17 so as to be movable up and down, and the inner blade body 3 is elastically pushed upward by a push-up spring. The inner blade of the inner blade body 3 is in elastic contact with the outer blade 21.
In the reciprocating electric razor using the electric motor A of this embodiment as a drive source, the drive frequency is determined by the natural frequency of the system. Accordingly, in this case, the total weight M of the movable element 2, the driver element 17, and the inner blade body 3, the spring constant Kb of the leaf spring constituting the coupling body 13, and the spring constant component Km due to the attractive force of the magnet are combined. From the constant K, the frequency f = (1 / 2π) · (K / M) 1/2 is determined.
[0016]
Thus, by alternating the current direction of the electromagnet that is the stator 1, the mover 2 moves in the reciprocating direction. However, when the mover 2 moves in the reciprocating direction, the connecting body 13 moves the fulcrum 50. An attachment part 51 constituting the first spring part 53a and an attachment part 51 constituting the second spring part 53b are provided on both sides of the boundary, and the fixed part is provided on one attachment part and the mover 2 is provided on the other attachment part. Since the mover 2 is attached to the stator 1 by attaching, the first spring portion 53a constituting one attachment portion 51 and the other attachment portion 51 constituting the other attachment portion 51 with the fulcrum portion 50 of the coupling body 13 as a boundary. The two spring parts 53b will move. In this case, when the second spring portion 53b moves in a pendulum manner, the first spring portion 53a moves in a pendulum manner using the fulcrum portion 50, which is the non-fixed end of the second spring portion 53b that has moved in the pendulum manner, as a fulcrum. Thus, since the pendulum motion is opposite to each other, the movable element 2 does not move up and down as a whole. Further, as compared with the conventional case where a single plate spring is used, the displacement of each of the spring portions 53a and 53b can be halved, and the length of the spring can be shortened.
[0017]
In this case, if the lengths of the first spring portion 53a and the second spring portion 53b are substantially the same, the vertical movement of the mover 2 can be made zero.
Here, a cutout is provided in the connecting body 13 made of a leaf spring to form two attachment portions 51 with the fulcrum 50 as a boundary to the connecting body 13 that connects the chassis 14 as a fixed portion and one movable element 2. In providing the first spring portion 53a and the second spring portion 53b, the connecting body 13 is formed by punching out a spring plate. In this case, in the embodiment shown in FIGS. The other spring portion 53b is disposed adjacent to the adjacent spring portion 53a through a notch, and the ends of the spring portions 53a and 53b are continuous at the fulcrum portion 50. With such a configuration, the simple coupling body 13 can be obtained with a simple configuration in which the spring portion 53a and the spring portion 53b are adjacent to each other through the notch and are continuous with the fulcrum portion 50.
[0018]
4 and 5 show another embodiment of the present invention. In this embodiment, the connecting body 13 has one spring portion 53a having an annular shape (in the embodiment, a rectangular annular shape), and the annular shape. The other spring portion 53b is located inside the one spring portion 53a, and one end portion of the other spring portion 53b is continuous with a part of one annular spring portion 53a, and this continuous portion is a fulcrum portion. This is an example of 50.
[0019]
In this, since the other spring part 53b is located inside one annular spring part 53a, it is strong against torsion of the coupling body 13, and in the thickness direction (front-rear direction) of the electric motor A. The rigidity of the coupling body 13 is increased.
Next, another embodiment of the present invention will be described with reference to FIG. In this embodiment, a non-displaceable plate 13a in which the connecting body 13 is rotatably attached to the stator 1 by a hinge 13c, and a non-displaceable plate 13b in which the connecting body 13 is rotatably attached to the fixed portion by a hinge 13d. The two plate bodies 13a are rotatably connected with a hinge 13e constituting the fulcrum 50 as a boundary. The connecting body 13 of the hinge mechanism including the two plate bodies 13a and 13b, the hinge 13c, the hinge 13d, and the hinge 13e that cannot be displaced is displaceable only in the movement direction and holds the gap 12. At this time, the spring constant K = Km (spring constant by the attractive force of the magnet). In this embodiment, the rigidity in the non-motion direction is very strong. Also in this embodiment, as shown in FIG. 6, the other plate body 13a is adjacent to one plate body 13a, and the other end portions of both plate bodies 13a are rotated around the hinge 13e serving as the fulcrum portion 50, respectively. Although not shown in the figure, the plate body 13a is annular, and one end of the annular plate body 13a is fixed to the fixed portion or the movable element 2 with a hinge 13c. The other plate body 13b is arranged in one annular plate body 13a, and is attached to the other one of the movable element 2 or the fixed portion by one end hinge 13d of the other plate body 13b. There is a case where the other end portion of 13b is configured to be rotatably attached to the other end portion of the annular plate body 13a by a hinge 13e serving as a fulcrum portion 50.
[0020]
Next, still another embodiment of the present invention will be described with reference to FIGS. That is, in each of the above-described embodiments, the connecting body 13 is configured to suspend the mover 2 from the fixed portion. In the embodiments shown in FIGS. It is comprised so that the needle | mover 2 may be lifted from. That is, in the embodiment shown in FIGS. 7 and 8, the movable element 2 is lifted by the coupling body 13 from the chassis 7 serving as a fixed portion. Here, the connecting body 13 is constituted by a leaf spring and is welded to the mover 2 and the chassis 7. The structure in which the movable element 2 is lifted from the fixed portion by the connecting body 13 in this way has the same effect as the structure in which the movable element 2 is lifted from the fixed portion by the connecting body 13 described above. In the structure shown in FIG. 7, the connecting body 13 has an annular shape (in the embodiment, a rectangular annular shape), and the other spring portion 53b is located inside the annular spring portion 53a. In this example, one end portion of the other spring portion 53 b is continuous with a part of one annular spring portion 53 a, and this continuous portion is a fulcrum portion 50. 8, the other spring part 53b is arranged adjacent to one spring part 53a via a notch, and the ends of both spring parts 53a and 53b are continuous at the fulcrum part 50. This is an example.
[0021]
Next, still another embodiment of the present invention will be described with reference to FIGS. In this embodiment, the coupling body 13 extends from the fixed portion and supports the mover 2 from the side surface. That is, the connecting body 13 made of a leaf spring extends from the chassis 7 constituting the fixed portion to the side to support the movable element 2 from the side surface. The connecting body 13 is welded and fixed to the mover 2 and the chassis 7. In this embodiment, the movable element 2 is not displaced in the vertical direction. 10 shows one spring portion 53a in which the connecting body 13 has an annular shape (in the embodiment, a rectangular annular shape), and the other spring portion 53b is located inside the one annular spring portion 53a. In this example, one end portion of the other spring portion 53b is continuous with a part of one annular spring portion 53a, and this continuous portion is the fulcrum portion 50. 9, the other spring part 53b is arranged adjacent to one spring part 53a via a notch, and the ends of both spring parts 53a and 53b are continuous at the fulcrum part 50. This is an example.
[0022]
【The invention's effect】
According to the first aspect of the present invention, there is provided a reciprocating electric motor for reciprocating the movable element with respect to the stator, and the electric motor can be displaced only in the movement direction and cannot be displaced except in the movement direction. In this connection body, the mover is firmly fixed to the fixed part to make the mover and the stator non-contact structure, this connection body has at least one fulcrum part, and has attachment parts on both sides with the fulcrum part as a boundary, Since the fixed part is attached to one attachment part, the mover is attached to the other attachment part, and the mover is held in a non-contact state with respect to the stator, the mover can be moved without contact, Since there is no sliding part, it can be moved at high speed, and since there is no sliding part, it has a long service life and low noise, and when the mounting part attached to the movable element moves due to the movement of the movable element, the fulcrum part becomes the fulcrum. The mounting part attached to the fixed part is attached to the mover. Since parts are constituted of for movement in the direction of motion opposite to the direction, that is, since the attachment portions on both sides in the boundary fulcrum portion of the coupling body move in opposite directions, on both sides of the mounting portion of the motion direction The displacement is small, and the amount of movement of the mover in the vertical direction can be reduced to suppress the occurrence of vibration in the vertical direction of the mover as a whole .
[0023]
In addition, in the invention described in claim 2, in addition to the effect of the invention described in claim 1, the connecting body is configured by extending both attachment portions 180 ° in reverse direction with the fulcrum portion as a boundary. Therefore, the length of the connecting body may be short.
Further, in the invention described in claim 3, in addition to the effect of the invention described in claim 1, since the connecting body is made of a leaf spring, the natural vibration when the connecting body determines the vibration frequency of the mover. It can be used as a term of a spring constant for obtaining a number.
[0024]
In addition, in the invention according to claim 4, in addition to the effect of the invention according to claim 1, the coupling body is formed by superposing a plurality of thin leaf springs. In addition to being able to be adjusted, it is possible to provide rigidity in the non-motion direction and prevent displacement in the non-motion direction.
In the invention according to claim 5, in addition to the effect of the invention according to claim 1, the non-displaceable plate body in which the connecting body is rotatably attached to the stator by a hinge, and the fixing portion The non-displaceable plate body, which can be pivotally attached by a hinge, and the two plate bodies, which are pivotally connected with a hinge constituting the fulcrum as a boundary, are extremely rigid in the non-motion direction. It is strong and can prevent displacement in the non-motion direction.
[0025]
In addition, in the invention described in claim 6, in addition to the effect of the invention described in claim 1, the connecting body is constituted by the first spring portion and the second spring portion with the fulcrum portion as a boundary. The length of each spring portion may be shorter than that of a single spring.
According to the seventh aspect of the invention, in addition to the effect of the first aspect of the invention, the lengths of the first spring portion and the second spring portion of the coupling body are substantially the same. The vertical movement of the child can be eliminated as much as possible.
[0026]
In the invention according to claim 8, in addition to the effect of the invention according to claim 3 or claim 4, the coupling body is arranged adjacent to one spring part and the other spring part adjacent thereto. Since the end portions of both spring portions are continuous at the fulcrum portion, the structure of the coupling body can be simplified.
In addition, in the invention according to claim 9, in addition to the effect of the invention according to claim 3 or claim 4, one spring portion in which the coupling body has an annular shape and one spring portion in the annular shape. The other spring part is located inside, and one end part of the other spring part is continuous with a part of one annular spring part, and the continuous part serves as a fulcrum part. The rigidity of the coupling body in the (front-rear direction) is improved, and displacement in the thickness direction of the electric motor can be prevented.
[Brief description of the drawings]
FIG. 1 is a front sectional view of an essential part of a reciprocating electric shaver using an electric motor of the present invention.
FIG. 2 is a perspective view of the assembled state of the reciprocating electric motor and the inner blade body of the above.
FIG. 3 is an exploded perspective view of the same reciprocating motor.
FIG. 4 is a perspective view of an assembled state of a reciprocating electric motor and an inner blade body according to another embodiment of the present invention.
FIG. 5 is an exploded perspective view of the same reciprocating motor.
FIG. 6 is a perspective view of an assembled state of a reciprocating electric motor and an inner blade body according to still another embodiment of the present invention.
FIG. 7 is a perspective view of an assembled state of a reciprocating electric motor and an inner blade body according to still another embodiment of the present invention.
FIG. 8 is a perspective view of an assembled state of a reciprocating electric motor and an inner blade body according to still another embodiment of the present invention.
FIG. 9 is a perspective view of an assembled state of a reciprocating electric motor and an inner blade body according to still another embodiment of the present invention.
FIG. 10 is a perspective view of an assembled state of a reciprocating electric motor and an inner blade body according to still another embodiment of the present invention.
[Explanation of symbols]
A Electric motor 1 Stator 2 Movable element 3 Inner blade 13 Linked body 50 Supporting point portion 51 Mounting portion

Claims (9)

固定子に対して可動子を往復動させるための往復運動式の電動機であって、運動方向にのみ変位可能で運動方向以外には変位不能の連結体で可動子を固定部に堅持して可動子と固定子とを非接触構造にし、この連結体は少なくとも一つの支点部を持ち、支点部を境にして両側に取付け部を備え、一方の取付け部に固定部を、他方の取付け部に可動子を取付けて可動子を固定子に対して非接触状態に保持すると共に、可動子の移動により可動子に取付けた取付け部が運動すると支点部を支点にして固定部に取付けた方の取付け部が上記可動子に取付けた取付け部の運動方向と逆方向に運動するように構成して成ることを特徴とする振動型リニアアクチュエータ。A reciprocating electric motor for reciprocating the mover with respect to the stator. The motor can be displaced only in the direction of movement and cannot be displaced in any direction other than the direction of movement. The connector and the stator have a non-contact structure, and this coupling body has at least one fulcrum part, and has attachment parts on both sides with the fulcrum part as a boundary, and the fixing part on one attachment part and the attachment part on the other attachment part. Install the mover to hold the mover in a non-contact state with respect to the stator , and when the mounting part attached to the mover moves due to the movement of the mover, the attachment to the fixed part with the fulcrum as the fulcrum A vibration type linear actuator characterized in that the portion moves in the direction opposite to the direction of movement of the attachment portion attached to the mover . 連結体が支点部を境にして両取付け部を180°逆方向に延設して構成してあることを特徴とする請求項1記載の振動型リニアアクチュエータ。 2. The vibration type linear actuator according to claim 1, wherein the connecting body is constructed by extending both attachment portions in the opposite direction by 180 [deg.] With the fulcrum portion as a boundary. 連結体が板ばねからなることを特徴とする請求項1記載の振動型リニアアクチュエータ。 2. The vibration type linear actuator according to claim 1, wherein the coupling body is made of a leaf spring. 連結体が薄い板ばねを複数枚重ね合わせて構成してあることを特徴とする請求項1記載の振動型リニアアクチュエータ。 2. The vibration type linear actuator according to claim 1, wherein the coupling body is formed by overlapping a plurality of thin leaf springs. 連結体が固定子に蝶番により回動自在に取付けられる変位不能の板体と、固定部に蝶番により回動自在に取付けられる変位不能の板体と、両板体を支点部を構成する蝶番を境にして回動自在に連結して構成してあることを特徴とする請求項1記載の振動型リニアアクチュエータ。 A non-displaceable plate that is pivotally attached to the stator by a hinge, a non-displaceable plate that is pivotally attached to the fixed portion by a hinge, and a hinge that constitutes the fulcrum of both plates. 2. The vibration type linear actuator according to claim 1, wherein the vibration type linear actuator is configured to be pivotably connected to a boundary. 連結体が支点部を境に第1ばね部と第2ばね部とから構成してあることを特徴とする請求項1記載の振動型リニアアクチュエータ。 2. The vibration type linear actuator according to claim 1, wherein the coupling body includes a first spring portion and a second spring portion with the fulcrum portion as a boundary. 連結体の第1ばね部と第2ばね部との長さが略同一であることを特徴とする請求項6記載の振動型リニアアクチュエータ。 The vibration type linear actuator according to claim 6, wherein the first spring portion and the second spring portion of the coupling body have substantially the same length. 連結体が一方のばね部の隣りに他方のばね部が隣接して配置され、両ばね部の端部同士が支点部において連続していることを特徴とする請求項3又は請求項4記載の振動型リニアアクチュエータ。 5. The connection body according to claim 3, wherein the coupling body is disposed adjacent to one spring portion and the other spring portion is adjacent to each other, and ends of both spring portions are continuous at a fulcrum portion. Vibration type linear actuator. 連結体が環状をした一方のばね部と、該環状をした一方のばね部の内部に他方のばね部が位置し、この他方のばね部の一端部が一方の環状をしたばね部の一部と連続して該連続部分が支点部となっていることを特徴とする請求項3又は請求項4記載の振動型リニアアクチュエータ。 One spring part in which the connecting body is annular, and the other spring part is located inside the one spring part, and one end of the other spring part is part of one annular spring part 5. The vibration type linear actuator according to claim 3, wherein the continuous portion is a fulcrum portion.
JP29472097A 1997-10-28 1997-10-28 Vibration type linear actuator Expired - Fee Related JP3661369B2 (en)

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JP3707421B2 (en) * 2001-10-26 2005-10-19 松下電工株式会社 Vibration type linear actuator
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