JP4487650B2 - Vibrating linear actuator and reciprocating electric shaver using the same - Google Patents

Vibrating linear actuator and reciprocating electric shaver using the same Download PDF

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JP4487650B2
JP4487650B2 JP2004176157A JP2004176157A JP4487650B2 JP 4487650 B2 JP4487650 B2 JP 4487650B2 JP 2004176157 A JP2004176157 A JP 2004176157A JP 2004176157 A JP2004176157 A JP 2004176157A JP 4487650 B2 JP4487650 B2 JP 4487650B2
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mover
connecting plate
linear actuator
type linear
vibration
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JP2005354879A (en
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宏明 清水
良 本橋
英一 薮内
孝宏 西中
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Panasonic Corp
Panasonic Electric Works Co Ltd
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Panasonic Corp
Matsushita Electric Works Ltd
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Description

本発明は、往復式電気かみそり等の駆動源として利用することができる振動型リニアアクチュエータと、これを往復駆動用の動力源として用いる往復式電気かみそりに関するものである。   The present invention relates to a vibration type linear actuator that can be used as a drive source for a reciprocating electric razor or the like, and a reciprocating electric razor using the same as a power source for reciprocating driving.

従来から電磁石を備えた固定子ブロックと、永久磁石とバックヨークを備え且つ固定子ブロックに対して可動する可動子と、複数の可動子を連結する連結ばね部と、可動子を固定子ブロックに取付けるためのばね性を有する連結板とを備え、固定子ブロックにおける電磁石の磁極面と可動子に設けた永久磁石の磁極面とのギャップを一定に保持しつつ電磁石に交互方向に供給される電流により可動子が振動する振動型リニアアクチュエータが知られている。（例えば、特許文献１参照）
ところが、この従来例にあっては、可動子と、連結ばね部と、連結板とが別部材であるため、振動型リニアアクチュエータの組み立て性が悪く、しかも、これら別部材の可動子と、連結ばね部と、連結板とをそれぞれ結合するための結合スペースが必要となって、振動型リニアアクチュエータの小型化が困難になるという問題があった。 Conventionally, a stator block having an electromagnet, a mover having a permanent magnet and a back yoke and movable with respect to the stator block, a connecting spring portion for connecting a plurality of movers, and a mover to the stator block Current that is supplied to the electromagnet in alternating directions while maintaining a constant gap between the pole face of the electromagnet in the stator block and the pole face of the permanent magnet provided on the mover. There is known a vibration type linear actuator in which a mover vibrates. (For example, see Patent Document 1)
However, in this conventional example, since the mover, the connecting spring portion, and the connecting plate are separate members, the assembling property of the vibration type linear actuator is poor, and the movable member and the connecting member are connected to each other. There is a problem in that it is difficult to reduce the size of the vibration type linear actuator because a coupling space for coupling the spring portion and the connecting plate is necessary.

また、従来から連結板はばね性を有する金属により形成してあり、金属製とすることで振動型リニアアクチュエータが発熱しても、この熱の影響を受けることなく、固定子ブロックにおける電磁石の磁極面と可動子に設けた永久磁石の磁極面とのギャップを金属製の連結板で一定状態に保持するようにしているが、連結板を合成樹脂により形成すると振動型リニアアクチュエータが発熱し、この熱の影響により上記合成樹脂製の連結板により上記ギャップを一定に保持できなくなるおそれがある。
特開２００４−０１６５２４号公報 Conventionally, the connecting plate has been formed of a metal having a spring property, and even if the vibration type linear actuator generates heat by being made of metal, the magnetic pole of the electromagnet in the stator block is not affected by this heat. The gap between the surface and the magnetic pole surface of the permanent magnet provided on the mover is kept constant by a metal connecting plate, but if the connecting plate is made of synthetic resin, the vibration type linear actuator generates heat. There is a possibility that the gap cannot be held constant by the connecting plate made of synthetic resin due to the influence of heat.
JP 2004-016524 A

本発明は上記の従来の問題点に鑑みて発明したものであって、小型化が図れ、組み立て性が向上し、しかも、簡単な構成で固定子ブロックにおける電磁石の磁極面と可動子に設けた永久磁石の磁極面とのギャップを保持できる振動型リニアアクチュエータ及びこれを用いた往復式電気かみそりを提供することを課題とするものである。   The present invention has been invented in view of the above-described conventional problems, and can be reduced in size, improved in assemblability, and provided on the magnetic pole face and the mover of the electromagnet in the stator block with a simple configuration. It is an object of the present invention to provide a vibration type linear actuator capable of maintaining a gap with a magnetic pole surface of a permanent magnet and a reciprocating electric shaver using the same.

上記課題を解決するために本発明に係る振動型リニアアクチュエータは、電磁石１を備えた固定子ブロック２と、永久磁石３とバックヨーク４を備え且つ固定子ブロック２に対して可動する可動子５と、複数の可動子５を連結する連結ばね部６と、可動子５を固定子ブロック２に取付けるためのばね性を有する連結板７とを備え、固定子ブロック２における電磁石１の磁極面と可動子５に設けた永久磁石３の磁極面とのギャップを一定に保持しつつ電磁石１に交互方向に供給される電流により可動子５が振動する振動型リニアアクチュエータ８において、複数の可動子５と連結板７と連結ばね部６とを合成樹脂により一体成形し、連結板７のばね定数の合計を連結ばね部６のばね定数の合計よりも大きく設定して成ると共に、複数の可動子５にそれぞれ一体化された連結板７の固定子ブロック２に取付けられる側の端部同士が一体に繋がった一体結合部１２となっており、さらに複数の可動子５にそれぞれ設けた上連設部２０に対して、連結板７の一端部と連結ばね部６の一端部とをそれぞれ連設し、連結板７の他端部を固定ブロック２に取り付けられる下連設部２１に連設し、これら複数の可動子５、上連設部２０、連結板７、連結ばね部６、下連設部２１を合わせて合成樹脂により一体成形して可動ブロック２２を構成し、且つ、固定子ブロック２における電磁石１の磁極面と可動子５に設けた永久磁石３の磁極面とのギャップを、上記連結ばね部６のばね定数の合計よりも大きく設定されたばね定数を有する連結板７により保持したことを特徴とするものである。 In order to solve the above problems, a vibration type linear actuator according to the present invention includes a stator block 2 having an electromagnet 1, a permanent magnet 3, a back yoke 4, and a mover 5 movable with respect to the stator block 2. And a connecting spring portion 6 for connecting the plurality of movers 5 and a connecting plate 7 having spring properties for attaching the movers 5 to the stator block 2, and the magnetic pole surface of the electromagnet 1 in the stator block 2. In the vibration type linear actuator 8 in which the mover 5 is vibrated by the current supplied to the electromagnet 1 in an alternate direction while maintaining a constant gap with the magnetic pole surface of the permanent magnet 3 provided on the mover 5, a plurality of movers 5 are provided. The connecting plate 7 and the connecting spring portion 6 are integrally formed of synthetic resin, and the total spring constant of the connecting plate 7 is set to be larger than the total spring constant of the connecting spring portion 6. End portions on the side of the connecting plate 7 attached to the stator block 2 that are attached to each other are integrally connected portions 12 that are integrally connected, and upper connecting portions 20 that are respectively provided on the plurality of movable elements 5. In contrast, one end of the connecting plate 7 and one end of the connecting spring 6 are connected to each other, and the other end of the connecting plate 7 is connected to the lower connecting portion 21 attached to the fixed block 2. A plurality of movers 5, an upper connecting portion 20, a connecting plate 7, a connecting spring portion 6, and a lower connecting portion 21 are combined and formed integrally with a synthetic resin to form a movable block 22 , and in the stator block 2 The gap between the magnetic pole surface of the electromagnet 1 and the magnetic pole surface of the permanent magnet 3 provided on the mover 5 is held by the connecting plate 7 having a spring constant set larger than the total spring constant of the connecting spring portion 6. It is characterized by.

このように複数の可動子５と連結板７と連結ばね部６とを合成樹脂により一体成形することで、それぞれ別体の可動子５と連結板７と連結ばね部６とを結合手段で結合するものに比べて、結合スペースが必要でなくて振動型リニアアクチュエータ８の小型化が図れるものであり、また、振動型リニアアクチュエータの組み立て性が向上するものであり、しかも、このように、小型化、組み立て性を向上させるために可動子５と連結板７と連結ばね部６とを合成樹脂により一体成形したにもかかわらず、連結板７のばね定数の合計を連結ばね部６のばね定数の合計よりも大きく設定して、固定子ブロック２における電磁石１の磁極面と可動子５に設けた永久磁石３の磁極面とのギャップを、上記連結ばね部６のばね定数の合計よりも大きく設定されたばね定数を有する連結板７により保持してあるので、合理的な構成で連結板７が振動型リニアアクチュエータの発熱による影響を受け難くして、連結板７による固定子ブロックにおける電磁石の磁極面と可動子に設けた永久磁石の磁極面とのギャップの保持しつつ、振動系の必要なばね定数を確保することができるものである。
また、複数の可動子５にそれぞれ一体化された連結板７の固定子ブロック２に取付けられる側の端部同士が一体に繋がった一体結合部１２となっており、さらに複数の可動子５にそれぞれ設けた上連設部２０に対して、連結板７の一端部と連結ばね部６の一端部とをそれぞれ連設し、連結板７の他端部を固定ブロック２に取り付けられる下連設部２１に連設し、これら複数の可動子５、上連設部２０、連結板７、連結ばね部６、下連設部２１を合わせて合成樹脂により一体成形して可動ブロック２２を構成したことにより、複数の可動子５間の位置を一定にでき、固定子ブロック２に連結板７を介して可動子５を取付ける際に、各可動子５の位置が簡易に且つ安定して決まり、振動型リニアアクチュエータ８の組み立てが簡単になり、組み立てばらつきが減少するものである。 In this way, the plurality of movers 5, the connecting plate 7, and the connecting spring portion 6 are integrally formed of synthetic resin, so that the separate movers 5, the connecting plate 7, and the connecting spring portion 6 are coupled by the coupling means. Compared to what is to be achieved, a coupling space is not required, and the vibration type linear actuator 8 can be reduced in size, and the assembly property of the vibration type linear actuator can be improved. Although the mover 5, the connecting plate 7 and the connecting spring portion 6 are integrally formed of synthetic resin in order to improve the efficiency and assemblability, the total spring constant of the connecting plate 7 is calculated as the spring constant of the connecting spring portion 6. And the gap between the magnetic pole surface of the electromagnet 1 in the stator block 2 and the magnetic pole surface of the permanent magnet 3 provided on the mover 5 is larger than the total spring constant of the connecting spring portion 6. Setting Since the are held by a connecting plate 7 having a spring constant, the connecting plate 7 in a rational structure is hardly affected by heat generation of the vibratory linear actuator, the magnetic pole surface of the electromagnet in the stator block by connecting plate 7 The necessary spring constant of the vibration system can be ensured while maintaining a gap between the magnetic pole surface of the permanent magnet provided on the movable element.
Further, end portions on the side attached to the stator block 2 of the connecting plate 7 integrated with the plurality of movers 5 are integrally connected portions 12 integrally connected to each other, and further to the plurality of movers 5. One lower end of the connecting plate 7 and one end of the connecting spring 6 are connected to the upper connecting portion 20 provided, and the other end of the connecting plate 7 is attached to the fixed block 2. The movable block 22 is configured by integrally forming the plurality of movable elements 5, the upper continuous portion 20, the connecting plate 7, the connecting spring portion 6, and the lower continuous portion 21 together with a synthetic resin. Thus, the position between the plurality of movers 5 can be made constant, and when the mover 5 is attached to the stator block 2 via the connecting plate 7, the position of each mover 5 is determined easily and stably, The assembly of the vibration type linear actuator 8 is simplified and assembled. In which the variation is reduced.

また、連結ばね部６で連結する複数の可動子５を振動方向Ａと直交する方向に並設し、可動子５にそれぞれ駆動子９を設け、一方の可動子５における駆動子９が他方の可動子５の直上に位置すると共に他方の可動子５における駆動子が一方の駆動子９の直上に位置し、且つ、各駆動子をそれぞれ可動子５の振動方向Ａにおいて中央位置に設け、且つ、連結ばね部６及び連結板７のばねの平衡状態において振動方向Ａと直交し且つ可動子５が並ぶ方向において駆動子９が同じ位置に位置するように設定してあることが好ましい。   In addition, a plurality of movers 5 connected by the connection spring portion 6 are arranged in parallel in a direction orthogonal to the vibration direction A, and a drive element 9 is provided on each of the movers 5, and the drive element 9 in one mover 5 is the other. The drive element in the other mover 5 is located immediately above one of the drive elements 9, and each of the drive elements is provided at a central position in the vibration direction A of the mover 5, and In the equilibrium state of the springs of the connection spring portion 6 and the connection plate 7, it is preferable that the drive element 9 is set at the same position in the direction orthogonal to the vibration direction A and in the direction in which the movable elements 5 are arranged.

このような構成とすることで、複数の可動子５を往復振動を行わせたとき、余分な振動が発生せず、振動バランスがきわめて良好となる。   With such a configuration, when the plurality of movable elements 5 are reciprocally oscillated, extra vibration is not generated, and the vibration balance is extremely good.

また、駆動子９を可動子５に磁性体よりなるねじ１０により結合し、可動子５に設けたバックヨーク４のねじ孔１１に磁性体よりなるねじ１０を螺着することが好ましい。   Further, it is preferable that the driving element 9 is coupled to the movable element 5 with a screw 10 made of a magnetic material, and the screw 10 made of a magnetic material is screwed into the screw hole 11 of the back yoke 4 provided in the movable element 5.

このような構成とすることで、バックヨーク４の機能を損なうことなくバックヨーク４内部で結合できて、結合部のスペースを他の部分に設ける必要がなく、振動型リニアアクチュエータ８の小型化が図れることになる。   By adopting such a configuration, the back yoke 4 can be coupled without impairing the function of the back yoke 4, and it is not necessary to provide a space for the coupling portion in other portions, and the vibration type linear actuator 8 can be downsized. It will be planned.

また、一端部側が可動子５に一体化された側となり且つ他端部側が固定子ブロック２に取付けられる側となる連結板７において、該連結板７の上記両端間の中間部分の厚みを両端部側よりも薄くすることが好ましい。   Further, in the connecting plate 7 whose one end is the side integrated with the mover 5 and whose other end is the side attached to the stator block 2, the thickness of the intermediate portion between the both ends of the connecting plate 7 is set to the both ends. It is preferable to make it thinner than the part side.

このような構成とすることで、可動子５の往復振動時に連結板７に発生する応力が分散され、最大応力が低減し、連結板７の疲労強度が向上して振動型リニアアクチュエータ８の寿命が向上し、また、振動型リニアアクチュエータ８の寿命の向上を選択しなければ、最大発生応力が低減するから連結板７の両端間の長さを短くして小型化を図ることができる。   With this configuration, the stress generated in the connecting plate 7 during the reciprocating vibration of the mover 5 is dispersed, the maximum stress is reduced, the fatigue strength of the connecting plate 7 is improved, and the life of the vibration type linear actuator 8 is increased. If the improvement of the life of the vibration type linear actuator 8 is not selected, the maximum generated stress is reduced, so that the length between both ends of the connecting plate 7 can be shortened to reduce the size.

また、可動子５の両側にそれぞれ複数の連結板７を振動方向Ａと同方向に並設し、可動子５の両側にそれぞれ複数設けた連結板７のうち振動方向Ａにおいて可動子５の中央位置に近い方の内側の連結板７が可動子５の中央位置から遠い方の外側の連結板７よりも厚みが薄いことが好ましい。   Further, a plurality of connecting plates 7 are arranged on both sides of the mover 5 in the same direction as the vibration direction A, and the center of the mover 5 in the vibration direction A among the plurality of connecting plates 7 provided on both sides of the mover 5. It is preferable that the inner connecting plate 7 closer to the position is thinner than the outer connecting plate 7 far from the center position of the mover 5.

しかして、内側の連結板７の厚みと外側の連結板７の厚みとが同じ場合には内側の連結板７が外側の連結板７よりも最大発生応力が大きいので、最大発生応力が大きい内側の連結板７の厚みを薄くして内側の連結板７の最大発生応力を下げると共に、最大発生応力が小さい外側の連結板７の厚みを厚くして外側の連結板７の最大発生応力を上げ、複数の連結板７に発生する応力を複数の連結板７に分散して連結板７の疲労強度が向上して、振動型リニアアクチュエータ８の寿命が向上し、また、振動型リニアアクチュエータ８の寿命の向上を選択しなければ、最大発生応力が低減するから連結板７の両端間の長さを短くして小型化を図ることができる。   If the inner connecting plate 7 and the outer connecting plate 7 have the same thickness, the inner connecting plate 7 has a larger maximum generated stress than the outer connecting plate 7. The thickness of the connecting plate 7 is reduced to reduce the maximum generated stress of the inner connecting plate 7, and the thickness of the outer connecting plate 7 having a small maximum generated stress is increased to increase the maximum generated stress of the outer connecting plate 7. The stress generated in the plurality of connection plates 7 is distributed to the plurality of connection plates 7 to improve the fatigue strength of the connection plates 7, thereby improving the life of the vibration type linear actuator 8. If the improvement of the life is not selected, the maximum generated stress is reduced, so that the length between the both ends of the connecting plate 7 can be shortened to reduce the size.

また、本発明の往復式電気かみそりは、上記請求項１乃至請求項５のいずれかに記載の振動型リニアアクチュエータ８を可動刃１３の往復駆動用の動力源としていることを特徴とするものである。 The reciprocating electric shaver according to the present invention is characterized in that the vibration type linear actuator 8 according to any one of claims 1 to 5 is used as a power source for reciprocating driving of the movable blade 13. is there.

このような構成とすることで、可動刃１３の駆動源として上記のような小型化ができる振動型リニアアクチュエータ８を用いることで、往復式電気かみそりの小型化が図れることになる。   With such a configuration, the reciprocating electric shaver can be miniaturized by using the vibration type linear actuator 8 that can be miniaturized as described above as a drive source of the movable blade 13.

本発明は、それぞれ別体の可動子と連結板と連結ばね部とを結合手段で結合するものに比べて、結合スペースが必要でなくて簡単な構成で振動型リニアアクチュエータの小型化が図れ、また、振動型リニアアクチュエータの組み立て性の向上するという効果があり、しかも、連結板が振動型リニアアクチュエータの発熱による影響を受け難くして、連結板による固定子ブロックにおける電磁石の磁極面と可動子に設けた永久磁石の磁極面とのギャップの保持しつつ、振動系の必要なばね定数を確保することができるという効果がある。さらに複数の可動子間の位置を一定にでき、固定子ブロックに連結板を介して可動子を取付ける際に、各可動子の位置が簡易に且つ安定して決まり、振動型リニアアクチュエータの組み立てが簡単になり、組み立てばらつきが減少するものである。 The present invention can reduce the size of the vibration type linear actuator with a simple configuration without requiring a coupling space, as compared with the case where the separate movable element, coupling plate and coupling spring portion are coupled by coupling means. In addition, there is an effect that the assembling property of the vibration type linear actuator is improved, and the connecting plate is hardly affected by the heat generated by the vibration type linear actuator, and the magnetic pole surface of the electromagnet and the mover in the stator block by the connecting plate There is an effect that a necessary spring constant of the vibration system can be ensured while maintaining a gap with the magnetic pole surface of the permanent magnet provided in. Furthermore, the position between the plurality of movers can be made constant, and when the mover is attached to the stator block via the connecting plate, the position of each mover is determined easily and stably, and the assembly of the vibration type linear actuator is facilitated. This simplifies and reduces assembly variations.

以下、本発明を添付図面に示す実施形態に基いて説明する。   Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

図１乃至図４には振動型リニアアクチュエータ８の一例を示している。振動型リニアアクチュエータ８は、電磁石１を備えた固定子ブロック２と、永久磁石３とバックヨーク４を備え且つ固定子ブロック２に対して可動する可動子５と、複数の可動子５を連結する連結ばね部６と、可動子５を固定子ブロック２に取付けるためのばね性を有する連結板７とで構成してある。   1 to 4 show an example of the vibration type linear actuator 8. The vibration type linear actuator 8 connects a stator block 2 having an electromagnet 1, a mover 5 having a permanent magnet 3 and a back yoke 4 and movable relative to the stator block 2, and a plurality of movers 5. The connecting spring portion 6 and a connecting plate 7 having a spring property for attaching the mover 5 to the stator block 2 are configured.

固定子ブロック２は、磁性材料の焼結体や磁性材料の鉄板を積層した固定子コア１６にボビン１４を介して電線よりなる巻線１５を施して形成した電磁石１により固定子を構成し、この固定子を構成する上記電磁石１の磁石面と反対側に基台１７をねじ具または圧入により固定することで固定子ブロック２を構成してある。基台１７は後述の可動子５の振動方向Ａ（往復振動方向）と同方向の両端部が固定子である電磁石１の両端部から外方向（可動子５の振動方向Ａと同方向において電磁石１から離れる方向）に突出していて固定部１８となっている。また、基台１７の可動子５の振動方向Ａと直交する方向で且つ電磁石１と重ねる方向（つまり電磁石１の磁極面と可動子５に設けた永久磁石３の磁極面とが対向する方向Ｂと同方向）と直交する方向（つまり後述の可動子５の並設方向Ｃと同方向）の両端部は図１、図３に示すように電磁石１における同方向の両端部と略同じ位置となっている。   The stator block 2 comprises a stator by an electromagnet 1 formed by applying a winding 15 made of an electric wire through a bobbin 14 to a stator core 16 in which a sintered body of magnetic material or an iron plate of magnetic material is laminated, The stator block 2 is configured by fixing the base 17 by screwing or press-fitting to the opposite side of the electromagnet 1 constituting the stator. The base 17 is an electromagnet in the outward direction from both ends of the electromagnet 1 whose both ends in the same direction as the vibration direction A (reciprocating vibration direction) of the mover 5 which will be described later are the stator (the same direction as the vibration direction A of the mover 5). Projecting in a direction away from 1) and serving as a fixing portion 18. The direction B is perpendicular to the vibration direction A of the mover 5 of the base 17 and overlaps the electromagnet 1 (that is, the direction B in which the magnetic pole surface of the electromagnet 1 and the magnetic pole surface of the permanent magnet 3 provided on the mover 5 face each other. And both ends of the direction orthogonal to the direction (that is, the same direction as the parallel arrangement direction C of the movable element 5 described later) are substantially the same positions as both ends of the electromagnet 1 in the same direction as shown in FIGS. It has become.

複数の可動子５と、各可動子５に一端を連設した連結板７と、各可動子５を連結する連結ばね部６とが合成樹脂により一体に形成してある。   A plurality of movers 5, a connecting plate 7 having one end connected to each mover 5, and a connecting spring portion 6 that connects each mover 5 are integrally formed of synthetic resin.

可動子５は固定子である電磁石１の磁石面と対向する側の面（つまり下面）に永久磁石３が設けてあり、更に、可動子５には永久磁石３の背面側（つまり永久磁石３の上面）にバックヨーク４が埋設してある。また、可動子５の永久磁石３を設ける部分と反対側の面は駆動子取付け部１９となっている。   The mover 5 is provided with a permanent magnet 3 on the surface (that is, the lower surface) facing the magnet surface of the electromagnet 1 that is a stator. Further, the mover 5 has a back surface (that is, the permanent magnet 3) on the mover 5. The back yoke 4 is embedded in the upper surface). The surface of the mover 5 opposite to the portion where the permanent magnet 3 is provided is a driver mount 19.

可動子５の振動方向Ａの両側にはそれぞれ振動方向Ａと同方向の外方に向けて上連設部２０が一体に連設してあり、該可動子５の振動方向の両側の上連設部２０にそれぞれ複数の連結板７の一端部（上端部）を一体に連設して複数の連結板７を振動方向Ａと同方向に並設してあり、両側においてそれぞれ並設した連結板７の他端部（下端部）がそれぞれ下連設部２１に一体に連設してある。連結板７はばね性を有する板状をしていて連結板７の厚み方向が振動方向と同方向となっており、両端部に並設した連結板７は互いの板面が振動方向において対向し合うようになっていて、該連結板７は振動方向（往復動方向）にのみ変位可能となっている。   On both sides of the vibration direction A of the mover 5, upper continuous portions 20 are integrally connected outwardly in the same direction as the vibration direction A. One end (upper end) of each of the plurality of connecting plates 7 is integrally connected to the installation portion 20, and the plurality of connecting plates 7 are arranged in the same direction as the vibration direction A, and are connected in parallel on both sides. The other end portion (lower end portion) of the plate 7 is integrally connected to the lower connecting portion 21. The connecting plate 7 has a spring shape, and the thickness direction of the connecting plate 7 is the same as the vibration direction. The connecting plates 7 arranged in parallel at both ends face each other in the vibration direction. The connecting plate 7 can be displaced only in the vibration direction (reciprocating direction).

複数の可動子５は振動方向Ａと直交する方向で且つ永久磁石３の磁極面と電磁石１の磁極面とが対向する方向と直交する方向に並設してあり、この並設する複数の可動子５を連結ばね部６により一体に連設してある。   The plurality of movers 5 are arranged in parallel in a direction orthogonal to the vibration direction A and in a direction orthogonal to the direction in which the magnetic pole surface of the permanent magnet 3 and the magnetic pole surface of the electromagnet 1 face each other. The child 5 is integrally connected by a connecting spring portion 6.

連結ばね部６は可動子５の振動方向Ａ（往復振動方向）にばね性を有するもので、可動子５の振動方向と直交する面上に位置するＵ字形の板ばねにより形成してあり、この連結ばね部６を並設する可動子５の振動方向の両端部にそれぞれ配置して振動方向の両側に配置し、振動方向の一方の端部側に配置した上記連結ばね部６のＵ字形の両端部（両上端部）をそれぞれ隣接する可動子５の各一方の端部に設けた上連設部２０の先端部に一体に連設し、振動方向の他方の端部側に配置した別の連結ばね部６のＵ字形の両端部（両上端部）をそれぞれ隣接する可動子５の各他方の端部に設けた上連設部２０の先端部に一体に連設してある。Ｕ字状をした連結ばね部６は高さ方向（電磁石１の磁極面と可動子５に設けた永久磁石３の磁極面とが対向する方向Ｂと同方向）の両端及び巾方向（つまり可動子５の並設方向Ｃと同方向）の両端が振動方向Ａから見て隣接する２枚の連結板７の投影面の高さ方向（つまり電磁石１の磁極面と可動子５に設けた永久磁石３の磁極面とが対向する方向Ｂと同方向）の両端及び巾方向の両端にほぼ重なるようになっている。   The connecting spring portion 6 has a spring property in the vibration direction A (reciprocating vibration direction) of the mover 5 and is formed by a U-shaped leaf spring located on a surface orthogonal to the vibration direction of the mover 5. The connection spring portions 6 are arranged at both ends in the vibration direction of the movable element 5 arranged side by side, arranged on both sides in the vibration direction, and the U-shape of the connection spring portion 6 disposed on one end side in the vibration direction. Both end portions (both upper end portions) are integrally connected to the distal end portion of the upper connecting portion 20 provided at one end portion of each of the adjacent movable elements 5 and arranged on the other end side in the vibration direction. The U-shaped both ends (both upper end portions) of another connecting spring portion 6 are integrally connected to the distal end portion of the upper connecting portion 20 provided at each other end portion of the adjacent movable element 5. The U-shaped connecting spring portion 6 has both ends in the height direction (the same direction as the direction B in which the magnetic pole surface of the electromagnet 1 and the magnetic pole surface of the permanent magnet 3 provided on the mover 5 face each other) and the width direction (that is, movable). The height direction of the projection surface of the two connecting plates 7 adjacent to each other when viewed from the vibration direction A (the same direction as the juxtaposed direction C of the child 5) (that is, the permanent surface provided on the magnetic pole surface of the electromagnet 1 and the mover 5). The magnetic pole surface of the magnet 3 substantially overlaps both ends in the opposite direction B and the width direction.

また、可動子５の並設方向Ｃにおいて隣接する上記下連設部２１同士が一体結合部１２により一体に連設してある。したがって、本実施形態では、並設した可動子５は振動方向の両側において、それぞれ、連結ばね部６により一体に連設してあると共に、下連設部２１同士を一体に連設する一体結合部１２によっても一体に連設してある。これら複数の可動子５、連結板７、連結ばね部６、一体結合部１２を合わせて合成樹脂により一体成形して可動ブロック２２が構成してある。また、上記一体結合部１２は可動ブロック２２を上記固定子ブロック２の基台１７に取付けるための取付け部となっている。   Further, the lower connecting portions 21 adjacent to each other in the parallel direction C of the mover 5 are integrally connected by the integral coupling portion 12. Therefore, in the present embodiment, the movable elements 5 arranged side by side are integrally connected to each other by the connecting spring portions 6 on both sides in the vibration direction, and the lower connecting portions 21 are integrally connected to each other. The unit 12 is also continuously provided. The movable block 22 is configured by combining the plurality of movable elements 5, the coupling plate 7, the coupling spring portion 6, and the integral coupling portion 12 and integrally molding the synthetic resin. The integral coupling portion 12 is an attachment portion for attaching the movable block 22 to the base 17 of the stator block 2.

可動子５には後付けで駆動子取付け部１９に可動子５とは別部材である駆動子９を図２、図７に示すねじ１０により取付けるようになっている。   A driver element 9, which is a separate member from the movable element 5, is attached to the movable element 5 by a screw 10 shown in FIGS. 2 and 7.

可動ブロック２２は振動方向Ａの両側に一体に設けた一体結合部１２をそれぞれ固定子ブロック２の基台１７両側に設けた固定部１８の上に重ねた状態で図２に示すねじ具２４により固着して振動型リニアアクチュエータ８を構成し、このように組み立てられた振動型リニアアクチュエータ８は図１、図３、図４に示すように一つのブロックとして構成される。この場合、本発明における振動型リニアアクチュエータ８は、複数の可動子５と連結板７と連結ばね部６とを合成樹脂により一体化してあるので、可動子５と連結板７と連結ばね部６がそれぞれ別部材で各部材を結合手段によりそれぞれ結合するものに比べて、各部材を結合する作業が必要でなくて組み立てが簡略化され、更に、結合に要するスペースが必要でなくてその分振動型リニアアクチュエータ８の小型化が図れることになる。   The movable block 22 is formed by a screw tool 24 shown in FIG. 2 in a state where the integral coupling portions 12 provided integrally on both sides in the vibration direction A are overlapped on the fixing portions 18 provided on both sides of the base 17 of the stator block 2. The vibration type linear actuator 8 is fixed to form the vibration type linear actuator 8, and the vibration type linear actuator 8 assembled in this way is configured as one block as shown in FIGS. In this case, in the vibration type linear actuator 8 according to the present invention, the plurality of movers 5, the connecting plate 7, and the connecting spring portion 6 are integrated with synthetic resin, and therefore the mover 5, the connecting plate 7, and the connecting spring portion 6 are integrated. Compared with the case where each member is a separate member and the member is joined by the joining means, the work for joining the members is not required, and the assembly is simplified. The mold linear actuator 8 can be downsized.

また、上記のように一体結合部１２により平行並設して隣接する可動子５にそれぞれ連結板７を介して連設された下連設部２１を一体に連設した実施形態においては、隣接する複数の可動子５間の位置を一体結合部１２により一定にでき、固定子ブロック２に連結板７を介して可動子５を取付ける際に、各可動子５の位置が簡易に且つ安定して決まり、振動型リニアアクチュエータ８の組み立てが簡単になり、組み立てばらつきを減少させることができるものである。勿論、本発明において、下連設部２１同士を一体結合部１２により一体に連設することなく（つまり一体結合部１２を設けることなく）、隣接する下連設部２１をそれぞれ基台１７の固定部１８に取付けるようにしてもよいものである。   Further, in the embodiment in which the lower connecting portions 21 connected in parallel by the integrated coupling portions 12 and connected to the adjacent movable elements 5 via the connecting plates 7 are integrally connected as described above, The position between the plurality of movable elements 5 can be made constant by the integral coupling portion 12, and when the movable elements 5 are attached to the stator block 2 via the connecting plate 7, the position of each movable element 5 is easily and stably. As a result, the assembly of the vibration type linear actuator 8 can be simplified, and assembly variations can be reduced. Of course, in the present invention, the lower connecting portions 21 are not integrally connected to each other by the integral coupling portion 12 (that is, the integral coupling portion 12 is not provided), and the adjacent lower connecting portions 21 are respectively connected to the base 17. The fixing part 18 may be attached.

このようにして固定子ブロック２の基台１７に可動ブロック２２を取付けることで、基台１７に対して複数の可動子５がそれぞれ連結板７により吊り上げ支持された状態となり、この吊り上げ支持された状態で固定子ブロック２における電磁石１の磁極面と可動子５に設けた永久磁石３の磁極面とのギャップが形成されるようになっている。言いかえれば、固定子ブロック２における電磁石１の磁極面と可動子５に設けた永久磁石３の磁極面とのギャップは可動子５と一体に成形された連結板７により保持されることになる。   By attaching the movable block 22 to the base 17 of the stator block 2 in this manner, the plurality of movable elements 5 are lifted and supported by the connecting plate 7 with respect to the base 17, respectively. In this state, a gap is formed between the magnetic pole surface of the electromagnet 1 in the stator block 2 and the magnetic pole surface of the permanent magnet 3 provided on the mover 5. In other words, the gap between the magnetic pole surface of the electromagnet 1 and the magnetic pole surface of the permanent magnet 3 provided on the mover 5 in the stator block 2 is held by the connecting plate 7 formed integrally with the mover 5. .

しかして、上記のように、平行に並設された隣接する可動子５の永久磁石３の極性を逆にしてあるので、隣接する２つの可動子５は、固定子ブロック２の固定子を構成する電磁石１の電流方向を交番にすることで、上記可動子５の永久磁石３と固定子である電磁石１との間で吸引・反発が作用し、連結板７を撓ませつつ可動子５が往復振動を行なうものであり、また、平行並設した隣合う可動子５の永久磁石３の極性を逆にしているので、隣合う可動子５同士は１８０°ずれた振動位相を有することになり、隣接する可動子５の往復振動のバランスを取るようになっている。   As described above, since the polarities of the permanent magnets 3 of the adjacent movable elements 5 arranged in parallel are reversed, the two adjacent movable elements 5 constitute the stator of the stator block 2. By making the current direction of the electromagnet 1 to be alternated, attraction / repulsion acts between the permanent magnet 3 of the mover 5 and the electromagnet 1 as a stator, and the mover 5 is bent while the connecting plate 7 is bent. The reciprocating vibration is performed, and the polarities of the permanent magnets 3 of the adjacent movable elements 5 arranged in parallel are reversed, so that the adjacent movable elements 5 have vibration phases shifted by 180 °. The reciprocating vibration of the adjacent mover 5 is balanced.

そして、振動方向の両側に設けた上記連結ばね部６は、一方の可動子５の負荷が大きく振幅が急激に減少しようとした時、他方の可動子５の動きでこの減少を抑えるものであり、このため、片方のみの振幅減少を防ぎ、常にバランスの取れた均一な振幅量を発生させるようになっている。また、この連結ばね部６は、前述の連結板７と共に各可動子５の固有振動数を一定にするための固有振動数設定ばねとなるようにしてある。   And the said connection spring part 6 provided in the both sides of the vibration direction suppresses this reduction | decrease by the movement of the other needle | mover 5 when the load of one needle | mover 5 is large and an amplitude tends to reduce rapidly. For this reason, the amplitude reduction of only one side is prevented, and a balanced and uniform amplitude amount is always generated. Further, the connecting spring portion 6 is a natural frequency setting spring for making the natural frequency of each movable element 5 constant together with the connecting plate 7 described above.

ここで、本発明における振動型リニアアクチュエータ８は、複数の可動子５と連結板７と連結ばね部６とを合成樹脂により一体化することで、上記のように小型化を図ると共に組み立て性を向上させるようにしたものにおいて、本発明においては、更に、連結板７のばね定数の合計を連結ばね部６のばね定数の合計よりも大きく設定してある。   Here, the vibration type linear actuator 8 according to the present invention integrates the plurality of movable elements 5, the connecting plate 7, and the connecting spring portion 6 with a synthetic resin, thereby reducing the size and assembling as described above. In the present invention, the total spring constant of the connecting plate 7 is set larger than the total spring constant of the connecting spring portion 6 in the present invention.

すなわち、振動型リニアアクチュエータ８が発熱すると、複数の可動子５と連結板７と連結ばね部６とを合成樹脂により一体化した場合、特に、可動子５を固定子ブロック２の基台１７に対して吊り上げ支持することで電磁石１の磁極面と永久磁石３の磁極面とのギャップを一定状態に保持している合成樹脂製の連結板７が熱の影響を受けてギャップを一定状態に保持できなくなるおそれがある。このため、本発明においては、できるだけ合成樹脂製の連結板７が熱の影響を受け難いように、連結板７のばね定数の合計を連結ばね部６のばね定数の合計よりも大きく設定したものである。これにより、基台１７に対して吊り上げ支持する合成樹脂製の連結板７が振動型リニアアクチュエータ８の発熱の影響を受け難くして電磁石１の磁極面と永久磁石３の磁極面とのギャップを一定状態に保持できることになる。   That is, when the vibration type linear actuator 8 generates heat, when the plurality of movers 5, the connecting plate 7, and the connecting spring portion 6 are integrated with a synthetic resin, in particular, the mover 5 is attached to the base 17 of the stator block 2. On the other hand, the synthetic resin connecting plate 7 holding the gap between the magnetic pole surface of the electromagnet 1 and the magnetic pole surface of the permanent magnet 3 in a constant state by being lifted and supported by the influence of heat maintains the gap in a constant state. There is a risk that it will not be possible. For this reason, in the present invention, the sum of the spring constants of the connecting plate 7 is set larger than the sum of the spring constants of the connecting spring portion 6 so that the connecting plate 7 made of synthetic resin is not affected by heat as much as possible. It is. As a result, the connecting plate 7 made of synthetic resin that is lifted and supported with respect to the base 17 is hardly affected by the heat generated by the vibration type linear actuator 8, and the gap between the magnetic pole surface of the electromagnet 1 and the magnetic pole surface of the permanent magnet 3 is increased. It can be held in a constant state.

図８には、振動型リニアアクチュエータ８に必要なばね定数を満たし且つ連結板７のばね定数の合計を連結ばね部６のばね定数の合計よりも大きく設定するために、板厚の薄い連結板７を複数設け、連結ばね部６を極力少なくしている例を示している。これにより振動方向に小型化して必要なばね定数を満たすことが可能となる。   In FIG. 8, in order to satisfy the spring constant necessary for the vibration type linear actuator 8 and to set the sum of the spring constants of the connecting plate 7 to be larger than the sum of the spring constants of the connecting spring portion 6, the connecting plate having a thin plate thickness is used. 7 shows an example in which a plurality of 7 are provided and the number of connecting spring portions 6 is reduced as much as possible. As a result, it is possible to reduce the size in the vibration direction and satisfy the necessary spring constant.

図３には本発明における振動型リニアアクチュエータ８の側面図（可動子５の振動方向Ａから見た図面）が示してあり、Ｕ字状をした連結ばね部６は高さ方向の両端及び巾方向の両端が振動方向Ａから見て隣接する２枚の連結板７の投影面の高さ方向（電磁石１の磁極面と可動子５に設けた永久磁石３の磁極面とが対向する方向Ｂと同方向）の両端及び巾方向の両端にほぼ重なるようになっているので、振動型リニアアクチュエータ８は、外形形状が略直方体のブロックのような形状となって、種々の機器に本振動型リニアアクチュエータ８を組み込む際にデットスペースが生じないように組み込むことが可能となり、振動型リニアアクチュエータ８を組み込んだ機器の小型化が可能となる。   FIG. 3 is a side view of the vibration type linear actuator 8 according to the present invention (drawing viewed from the vibration direction A of the movable element 5). The U-shaped connecting spring portion 6 has both ends and widths in the height direction. The height direction of the projection surfaces of the two connecting plates 7 adjacent to each other when viewed from the vibration direction A (direction B in which the magnetic pole surface of the electromagnet 1 and the magnetic pole surface of the permanent magnet 3 provided on the mover 5 face each other) The vibration type linear actuator 8 is shaped like a substantially rectangular parallelepiped block so that the vibration type linear actuator 8 can be applied to various devices. When the linear actuator 8 is assembled, it can be assembled so as not to generate a dead space, and the apparatus incorporating the vibration type linear actuator 8 can be downsized.

ところで、振動方向Ａと直交する方向に平行に並設した可動子５にはそれぞれ駆動子９を取付けるが、各可動子５の駆動子取付け部１９に駆動子９のＬ状をした連結部９ａをねじ１０で取付けるものであり、この場合、駆動子取付け部１９に取付ける連結部９ａは各可動子５の振動方向Ａにおける中央位置を中心にした線対称の形状をしている。また、図５に示すように、一方の可動子５における駆動子９が他方の可動子５の直上（つまり、可動子５の永久磁石３を設けた側の面の反対側の面と対向する位置）に位置し、また、他方の可動子５における駆動子９が一方の駆動子９の直上に位置するようになっていて、両駆動子９は振動方向Ａに対して直交し且つ隣接する可動子５間の中心線Ｘ（図５参照）に対して対称となっており、更に、各駆動子９がそれぞれ可動子５の振動方向Ａにおいて中央位置に位置するようになっていて、両駆動子９は、連結ばね部６及び連結板７のばねの平衡状態において振動方向Ａと直交し且つ可動子５が並ぶ方向における中心線Ｙ（図６参照）上に位置している。ここで、隣接する可動子５にそれぞれ取付けられる駆動子９のＬ状をした連結部９ａは一方の駆動子９の連結部９ａが二股状となっていて、このＬ状をした二股状の連結部９ａの中間の隙間部分に他方の駆動子９のＬ状をした連結部９ａが挿通してある。上記のような構成とすることで、連結板７、連結ばね部６のばねの平衡状態において、隣接する駆動子９の重心を合わせることができ、複数の可動子５を往復振動を行わせたとき、余分な振動が発生せず、振動バランスをきわめて良好にすることができる。ここで、Ｌ状をした二股状の連結部９ａの中間の隙間部分に他方の駆動子９のＬ状をした連結部９ａが挿通して、上記のように隣接する駆動子９の重心を合わせるようにするに当たって、これらの駆動子９を隣接する可動子５、連結板７、連結ばね部６と共に合成樹脂で一体に成形することも考えられるが、この場合には、金型構造が複雑となり、また、Ｌ状をした二股状の連結部９ａの中間の隙間部分に他方の駆動子９のＬ状をした連結部９ａが挿通する部分を成形するには両連結部９ａ間に比較的大きな隙間を形成しなければならず、その分上下高さが高くなるが、本実施形態のように別体とすることで、後付けでＬ状をした二股状の連結部９ａの中間の隙間部分に他方の駆動子９のＬ状をした連結部９ａが挿通するようにして各駆動子９をそれぞれ隣接する可動子５に簡単に取付けることができ、両連結部９ａ間に金型部を抜くための比較的大きな隙間を形成する必要がなく、高さ方向の寸法を短くできて小型化が図れることになる。   By the way, each of the movers 5 arranged in parallel in the direction orthogonal to the vibration direction A is attached with a drive element 9, but the drive element mounting portion 19 of each mover 5 has an L-shaped connection portion 9 a. In this case, the connecting portion 9a attached to the driver attachment portion 19 has a line-symmetric shape with the center position in the vibration direction A of each movable element 5 as the center. Further, as shown in FIG. 5, the driver 9 in one of the movable elements 5 faces directly above the other movable element 5 (that is, the surface opposite to the surface of the movable element 5 on which the permanent magnet 3 is provided). The driver 9 of the other movable element 5 is positioned immediately above one of the driver elements 9, and both the driver elements 9 are orthogonal to and adjacent to the vibration direction A. The drive elements 9 are symmetrical with respect to the center line X (see FIG. 5) between the movers 5, and each driver element 9 is positioned at the center position in the vibration direction A of the mover 5. The driver element 9 is positioned on the center line Y (see FIG. 6) in the direction orthogonal to the vibration direction A and in the direction in which the movable elements 5 are arranged in the equilibrium state of the springs of the connection spring portion 6 and the connection plate 7. Here, the L-shaped connecting portion 9a of the driver element 9 attached to each of the adjacent movable elements 5 has a bifurcated connecting portion 9a of one driver element 9, and this L-shaped bifurcated connection. An L-shaped connecting portion 9a of the other driver element 9 is inserted into a gap portion in the middle of the portion 9a. By adopting the configuration as described above, the center of gravity of the adjacent driver element 9 can be matched in the equilibrium state of the springs of the connecting plate 7 and the connecting spring portion 6, and the plurality of movable elements 5 are caused to reciprocate. At this time, no excessive vibration is generated, and the vibration balance can be made extremely good. Here, the L-shaped connecting portion 9a of the other driver element 9 is inserted into the intermediate gap portion of the L-shaped bifurcated connecting section 9a, and the centers of gravity of the adjacent driver elements 9 are aligned as described above. In doing so, it may be considered that these driver elements 9 are integrally formed of synthetic resin together with the adjacent movable element 5, connecting plate 7, and connecting spring portion 6, but in this case, the mold structure becomes complicated. In addition, in order to form a portion through which the L-shaped connecting portion 9a of the other driver element 9 is inserted into the intermediate gap portion of the L-shaped bifurcated connecting portion 9a, the two connecting portions 9a are relatively large. A gap must be formed, and the vertical height is increased accordingly, but by making it a separate body as in this embodiment, it is added to the intermediate gap portion of the bifurcated connecting portion 9a that is L-shaped later. Each driver element is inserted so that the L-shaped connecting portion 9a of the other driver element 9 is inserted. Can be easily attached to the adjacent movers 5, and it is not necessary to form a relatively large gap between the connecting portions 9a for removing the mold portion, and the size in the height direction can be shortened to reduce the size. Can be planned.

また、駆動子９を可動子５に対してねじ１０により結合して取付けるに当たって、図７に示すようにねじ１０を磁性体により構成し、更にバックヨーク４にねじ孔１１を設け、駆動子９の連結部９ａに設けた孔から磁性体よりなるねじ１０を挿入し、合成樹脂により形成した可動子５に設けた孔を挿通してバックヨーク４に設けたねじ孔１１に螺着することで駆動子９を可動子５に取付けるようにするのが好ましい。このようなねじ結合をすると、ねじ１０が磁性材料であるためねじ１０の結合部がバックヨーク４の機能を有することになる。このようにバックヨーク４の中に駆動子９の結合部を設けるため、他に結合部を設ける必要がなく、振動型リニアアクチュエータ８の小型化が可能となるものである。なお、駆動子９をバックヨーク４に結合するには上記磁性体よりなるねじ１０以外に、磁性体よりなるピンなどによる溶接、接着等により駆動子９をバックヨークに結合するようにしてもよい。要は磁性体よりなる結合部材により駆動子９をバックヨーク４に結合すると、磁性体よりなる結合部材がバックヨーク４の機能を有することになる。   Further, when the driver element 9 is attached to the movable element 5 by connecting with the screw 10, the screw 10 is made of a magnetic material as shown in FIG. 7, and the screw hole 11 is provided in the back yoke 4. A screw 10 made of a magnetic material is inserted from a hole provided in the connecting portion 9a, and a hole provided in the mover 5 formed of a synthetic resin is inserted and screwed into a screw hole 11 provided in the back yoke 4. The driver 9 is preferably attached to the mover 5. When such a screw connection is made, since the screw 10 is a magnetic material, the connecting portion of the screw 10 has the function of the back yoke 4. Since the connecting portion of the driver element 9 is provided in the back yoke 4 in this way, there is no need to provide another connecting portion, and the vibration type linear actuator 8 can be reduced in size. In order to couple the drive element 9 to the back yoke 4, in addition to the screw 10 made of the magnetic material, the drive element 9 may be joined to the back yoke by welding, bonding or the like with a pin made of a magnetic material. . In short, when the driving element 9 is coupled to the back yoke 4 by a coupling member made of a magnetic material, the coupling member made of a magnetic material has the function of the back yoke 4.

図８には本発明の他の実施形態が示してある。本実施形態においては、一端部側が可動子５に一体化された側となり且つ他端部側が固定子ブロック２に取付けられる側となる連結板７において、連結板７の上記両端間の中間部分の厚みを両端部側よりも薄くしてある。   FIG. 8 shows another embodiment of the present invention. In the present embodiment, in the connecting plate 7 whose one end is the side integrated with the mover 5 and whose other end is the side attached to the stator block 2, the intermediate portion between the both ends of the connecting plate 7. The thickness is made thinner than both ends.

図１０（ｃ）には、図１０（ａ）のように連結板７の各部の厚が一定となっている場合と、図１０（ｂ）のような連結板７の両端間の中間部分の厚みが両端部側よりも薄い場合における連結板７の各位置と、各位置における発生応力との関係をグラフで示している。図１０（ｃ）において、連結板７が両端間の各部において厚が一定の場合の最大応力がσＭＡＸ１で、連結板７の両端間の中間部分の厚みを両端部側よりも薄い場合の最大応力がσＭＡＸ２である。   10 (c) shows a case where the thickness of each part of the connecting plate 7 is constant as shown in FIG. 10 (a) and an intermediate portion between both ends of the connecting plate 7 as shown in FIG. 10 (b). The relationship between each position of the connecting plate 7 and the generated stress at each position when the thickness is thinner than both end portions is shown in a graph. In FIG. 10C, the maximum stress when the connecting plate 7 has a constant thickness at each part between both ends is σMAX1, and the maximum stress when the thickness of the intermediate part between both ends of the connecting plate 7 is thinner than the both end sides. Is σMAX2.

ところで、連結板７の長さと最大発生応力との関係は図９（ａ）に示すグラフのようになり、また、最大発生応力と製品寿命との関係は図９（ｂ）に示すグラフのようになる。   Incidentally, the relationship between the length of the connecting plate 7 and the maximum generated stress is as shown in the graph of FIG. 9A, and the relationship between the maximum generated stress and the product life is as shown in the graph of FIG. 9B. become.

したがって、上記のように連結板７の両端間の中間部分の厚みを両端部側よりも薄くなるように偏肉にすることで、最大応力をσＭＡＸ２に下げることで、連結板７の長さはそのままで長寿命化を図ったり、あるいは連結板７を短くして小型化が図ることが選択できることになる。   Therefore, the length of the connecting plate 7 is reduced by reducing the maximum stress to σMAX2 by making the thickness of the intermediate portion between both ends of the connecting plate 7 thinner than the both end sides as described above. It can be selected to extend the life as it is, or to shorten the connecting plate 7 to reduce the size.

また、図８においては、可動子５の両側にそれぞれ複数の連結板７を振動方向Ａと同方向に並設してあるが、この可動子５の両側にそれぞれ複数並設した連結板７のうち振動方向Ａにおいて可動子５の中央位置に近い方の内側の連結板７（図８において連結板７ａで示す）が可動子５の中央位置から遠い方の外側の連結板７（図８において連結板７ｂで示す）よりも厚みを薄くしてある。   In FIG. 8, a plurality of connecting plates 7 are arranged on both sides of the mover 5 in the same direction as the vibration direction A. However, a plurality of connecting plates 7 arranged on both sides of the mover 5 are arranged. Among them, the inner connecting plate 7 (indicated by the connecting plate 7a in FIG. 8) closer to the center position of the mover 5 in the vibration direction A is the outer connecting plate 7 (in FIG. 8) farther from the center position of the mover 5. The thickness is smaller than that of the connecting plate 7b.

すなわち、内側の連結板７ａの厚みと外側の連結板７ｂの厚みとが同じ場合（共に厚みがＴ０の場合）には図１１（ａ）に示すように内側の連結板７ａが外側の連結板７ｂよりも最大発生応力が大きい（σ０；内側の連結板７ａの最大発生応力）ものである。したがって、図１１（ｂ）に示すように、最大発生応力が大きい内側の連結板７ａの厚みをＴ０からＴ１に薄くして最大発生応力をσ０からσ１に下げ、一方、最大発生応力が小さい外側の連結板７ｂの厚みをＴ０からＴ２に厚くして最大発生応力をσ１まで上げることで、内側の連結板７ａ、外側の連結板７ｂの最大発生応力をσ１にして複数の連結板７に発生する応力を複数の連結板７に均等に分散して連結板７の疲労強度が向上することができる。そして、複数の連結板７全体における最大発生応力をσ０からσ１に低下できるので、図９（ａ）（ｂ）のグラフから明らかなように連結板７の長さはそのままで長寿命化を図ったり、あるいは連結板７を短くして小型化が図ることが選択できることになる。   That is, when the thickness of the inner connecting plate 7a and the thickness of the outer connecting plate 7b are the same (both when the thickness is T0), the inner connecting plate 7a becomes the outer connecting plate as shown in FIG. The maximum generated stress is larger than 7b (σ0; maximum generated stress of the inner connecting plate 7a). Therefore, as shown in FIG. 11 (b), the thickness of the inner connecting plate 7a having the largest maximum generated stress is reduced from T0 to T1 to reduce the maximum generated stress from σ0 to σ1, while the maximum generated stress is small. By increasing the thickness of the connecting plate 7b from T0 to T2 and increasing the maximum generated stress to σ1, the maximum generated stress of the inner connecting plate 7a and the outer connecting plate 7b is set to σ1 and is generated in a plurality of connecting plates 7. Thus, the fatigue strength of the connecting plate 7 can be improved by uniformly distributing the stress to the connecting plates 7. Since the maximum stress generated in the whole of the plurality of connecting plates 7 can be reduced from σ0 to σ1, the length of the connecting plate 7 remains as it is as shown in the graphs of FIGS. Alternatively, it is possible to select to reduce the size by shortening the connecting plate 7.

図１２には上記のような構成の振動型リニアアクチュエータ８を可動刃１３の駆動源として用いた往復式電気かみそりが示してあり、図１２においては往復式電気かみそりの上部ブロックのみが示してあり、使用時にグリップとなる電源部を内蔵した本体部は省略している。つまり、図１２に示す上部ブロックは本体部の上部に上下移動自在で且つ左右に揺動自在に取付けられるものである。振動型リニアアクチュエータ８はこの往復式電気かみそりの上部ブロックのハウジング２５内に配置して取付けられ、駆動子９に内刃としての可動刃１３を取付け、ハウジング２５の上開口を覆うように外刃２６が設けてある。そして、振動型リニアアクチュエータ８を往復振動させることで、駆動子９に取付けた可動刃１３が外刃２６の下面側を往復動して外刃２６の刃孔から導入した毛を可動刃１３により切断するようになっている。   FIG. 12 shows a reciprocating electric razor using the vibration type linear actuator 8 configured as described above as a drive source for the movable blade 13, and FIG. 12 shows only the upper block of the reciprocating electric razor. The main body part with a built-in power supply part that becomes a grip when used is omitted. That is, the upper block shown in FIG. 12 is attached to the upper part of the main body so as to be movable up and down and swingable to the left and right. The vibration type linear actuator 8 is disposed and mounted in the housing 25 of the upper block of the reciprocating electric razor. The movable blade 13 as an inner blade is attached to the driver 9, and the outer blade is covered so as to cover the upper opening of the housing 25. 26 is provided. Then, by reciprocatingly vibrating the vibration type linear actuator 8, the movable blade 13 attached to the driver 9 reciprocates on the lower surface side of the outer blade 26, and the hair introduced from the blade hole of the outer blade 26 is moved by the movable blade 13. It is designed to cut.

このような振動型リニアアクチュエータ８を内装した往復式電気かみそりは、前述のように小型化した振動型リニアアクチュエータ８を可動刃１３の駆動源として用いることで、往復式電気かみそりの小型化が図れるものである。   Such a reciprocating electric razor with a built-in vibration type linear actuator 8 can reduce the size of the reciprocating electric shaver by using the vibration type linear actuator 8 reduced in size as a driving source of the movable blade 13 as described above. Is.

本発明の振動型リニアアクチュエータの斜視図である。It is a perspective view of a vibration type linear actuator of the present invention. 同上の分解斜視図である。It is an exploded perspective view same as the above. 同上の側面図である。It is a side view same as the above. 同上の正面図である。It is a front view same as the above. 同上の隣合う可動子にそれぞれ駆動子を取付けた状態の側面図である。It is a side view in the state where a driver was attached to each adjacent mover same as the above. 同上の隣合う可動子にそれぞれ駆動子を取付けた状態の平面図である。It is a top view of the state which attached the drive element to each adjacent needle | mover same as the above. 同上の可動子に駆動子を取付ける例を示す分解斜視図である。It is a disassembled perspective view which shows the example which attaches a drive element to the needle | mover same as the above. 同上の連結板の実施形態を示す要部正面図である。It is a principal part front view which shows embodiment of the connection board same as the above. （ａ）は連結板の長さと最大発生応力との関係を示すグラフであり、（ｂ）は最大発生応力と製品寿命との関係を示すグラフである。(A) is a graph which shows the relationship between the length of a connection board, and the maximum generation stress, (b) is a graph which shows the relationship between the maximum generation stress and a product lifetime. （ａ）は連結板が両端間の各部にの厚が一定となっている場合を示す説明図であり、（ｂ）は連結板の両端間の中間部分の厚みが両端部側よりも薄い場合を示す説明図であり、（ｃ）は（ａ）と（ｂ）の各場合における連結板の各位置と、各位置における発生応力との関係をグラフで示している。(A) is explanatory drawing which shows the case where the thickness of each part between both ends of a connecting plate is constant, (b) is the case where the thickness of the intermediate part between both ends of a connecting plate is thinner than the both ends side (C) is a graph showing the relationship between each position of the connecting plate and the generated stress at each position in each case of (a) and (b). （ａ）は内側の連結板の厚みと外側の連結板の厚みとが同じ場合におけるブレード厚と最大発生応力との関係を示すグラフであり、（ｂ）は内側の連結板の厚みを薄くすると共に外側の連結板の厚みを厚くした場合のブレード厚と最大発生応力との関係を示すグラフである。(A) is a graph which shows the relationship between the blade thickness and the maximum generated stress when the thickness of the inner connecting plate is the same as the thickness of the outer connecting plate, and (b) reduces the thickness of the inner connecting plate. 6 is a graph showing the relationship between the blade thickness and the maximum generated stress when the thickness of the outer connecting plate is increased. 同上の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の要部正面断面図である。It is principal part front sectional drawing of a reciprocating electric shaver using the vibration type linear actuator same as the above.

符号の説明Explanation of symbols

１ 電磁石
２ 固定子ブロック
３ 永久磁石
４ バックヨーク
５ 可動子
６ 連結ばね部
７ 連結板
８ 振動型リニアアクチュエータ
９ 駆動子
１０ ねじ
１１ ねじ孔
１２ 一体結合部
１３ 可動刃 DESCRIPTION OF SYMBOLS 1 Electromagnet 2 Stator block 3 Permanent magnet 4 Back yoke 5 Movable element 6 Connecting spring part 7 Connecting plate 8 Vibrating linear actuator 9 Driver 10 Screw 11 Screw hole 12 Integrated coupling part 13 Movable blade

Claims (6)

電磁石を備えた固定子ブロックと、永久磁石とバックヨークを備え且つ固定子ブロックに対して可動する可動子と、複数の可動子を連結する連結ばね部と、可動子を固定子ブロックに取付けるためのばね性を有する連結板とを備え、固定子ブロックにおける電磁石の磁極面と可動子に設けた永久磁石の磁極面とのギャップを一定に保持しつつ電磁石に交互方向に供給される電流により可動子が振動する振動型リニアアクチュエータにおいて、複数の可動子と連結板と連結ばね部とを合成樹脂により一体成形し、連結板のばね定数の合計を連結ばね部のばね定数の合計よりも大きく設定して成ると共に、複数の可動子にそれぞれ一体化された連結板の固定子ブロックに取付けられる側の端部同士が一体に繋がった一体結合部となっており、さらに複数の可動子にそれぞれ設けた上連設部に対して、連結板の一端部と連結ばね部の一端部とをそれぞれ連設し、連結板の他端部を固定ブロックに取り付けられる下連設部に連設し、これら複数の可動子、上連設部、連結板、連結ばね部、下連設部を合わせて合成樹脂により一体成形して可動ブロックを構成し、且つ、固定子ブロックにおける電磁石の磁極面と可動子に設けた永久磁石の磁極面とのギャップを、上記連結ばね部のばね定数の合計よりも大きく設定されたばね定数を有する連結板により保持したことを特徴とする振動型リニアアクチュエータ。 A stator block having an electromagnet, a mover having a permanent magnet and a back yoke and movable with respect to the stator block, a connecting spring portion for connecting a plurality of movers, and a mover to be attached to the stator block A connecting plate having the spring property of the magnet, and movable by the current supplied to the electromagnet in alternate directions while maintaining a constant gap between the magnetic pole surface of the electromagnet in the stator block and the magnetic pole surface of the permanent magnet provided on the mover. In a vibration type linear actuator that vibrates, a plurality of movers, connecting plates, and connecting springs are integrally formed of synthetic resin, and the total spring constant of the connecting plates is set larger than the total spring constant of the connecting springs. In addition, the end portions on the side of the connecting plate attached to the stator block of the connecting plate integrated with each of the plurality of movers are integrally connected to each other. A lower continuous arrangement in which one end of the connecting plate and one end of the connecting spring are connected to the upper connecting portion provided on each of the plurality of movable elements, and the other end of the connecting plate is attached to the fixed block. The plurality of movers, upper connection portions, connection plates, connection spring portions, and lower connection portions are combined and formed integrally with a synthetic resin to form a movable block , and in the stator block A vibration characterized in that the gap between the magnetic pole surface of the electromagnet and the magnetic pole surface of the permanent magnet provided on the mover is held by a connecting plate having a spring constant set larger than the total spring constant of the connecting spring portion. Type linear actuator. 連結ばね部で連結する複数の可動子を振動方向と直交する方向に並設し、可動子にそれぞれ駆動子を設け、一方の可動子における駆動子が他方の可動子の直上に位置すると共に他方の可動子における駆動子が一方の可動子の直上に位置し、且つ、各駆動子をそれぞれ可動子の振動方向において中央位置に設け、且つ、連結ばね部及び連結板のばねの平衡状態において振動方向と直交し且つ可動子が並ぶ方向において駆動子が同じ位置に位置するように設定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 plurality of movers connected by a connecting spring portion are arranged in a direction perpendicular to the vibration direction, and a drive element is provided on each of the movers. The drive element in one of the movers is positioned immediately above the other mover and the other The movable element of the movable element is located immediately above one movable element, and each of the movable elements is provided at a central position in the vibration direction of the movable element, and vibrates in the equilibrium state of the spring of the coupling spring and the coupling plate. 2. The vibration type linear actuator according to claim 1, wherein the drive element is set at the same position in a direction orthogonal to the direction and in which the movers are arranged. 駆動子を可動子に磁性体よりなるねじにより結合し、可動子に設けたバックヨークのねじ孔に磁性体よりなるねじを螺着して成ることを特徴とする請求項１又は請求項２記載の振動型リニアアクチュエータ。   3. The drive element is coupled to the mover by a screw made of a magnetic material, and a screw made of a magnetic material is screwed into a screw hole of a back yoke provided in the mover. Vibration type linear actuator. 一端部側が可動子に一体化された側となり且つ他端部側が固定子ブロックに取付けられる側となる連結板において、該連結板の上記両端間の中間部分の厚みを両端部側よりも薄くして成ることを特徴とする請求項１乃至請求項３のいずれかに記載の振動型リニアアクチュエータ。   In the connecting plate in which the one end side is the side integrated with the mover and the other end side is the side attached to the stator block, the thickness of the intermediate portion between both ends of the connecting plate is made thinner than the both end sides. The vibration type linear actuator according to any one of claims 1 to 3, wherein the vibration type linear actuator is formed. 可動子の両側にそれぞれ複数の連結板を振動方向と同方向に並設し、可動子の両側にそれぞれ複数設けた連結板のうち振動方向において可動子の中央位置に近い方の内側の連結板が可動子の中央位置から遠い方の外側の連結板よりも厚みが薄いことを特徴とする請求項１乃至請求項４のいずれかに記載の振動型リニアアクチュエータ。   A plurality of connecting plates are arranged on both sides of the mover in the same direction as the vibration direction, and a plurality of connecting plates provided on both sides of the mover are arranged on the inner side closer to the center position of the mover in the vibration direction. 5. The vibration type linear actuator according to claim 1, wherein the thickness is thinner than the outer connecting plate far from the center position of the mover. 請求項１乃至請求項５のいずれかに記載の振動型リニアアクチュエータを可動刃の往復駆動用の動力源としていることを特徴とする往復式電気かみそり。   A reciprocating electric shaver characterized in that the vibration type linear actuator according to any one of claims 1 to 5 is used as a power source for reciprocating driving of a movable blade.
JP2004176157A 2004-06-14 2004-06-14 Vibrating linear actuator and reciprocating electric shaver using the same Expired - Lifetime JP4487650B2 (en)

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