JPH08243113A - Magnetic axis joint and dental electrical hand piece equipped with the same - Google Patents
Magnetic axis joint and dental electrical hand piece equipped with the sameInfo
- Publication number
- JPH08243113A JPH08243113A JP7080860A JP8086095A JPH08243113A JP H08243113 A JPH08243113 A JP H08243113A JP 7080860 A JP7080860 A JP 7080860A JP 8086095 A JP8086095 A JP 8086095A JP H08243113 A JPH08243113 A JP H08243113A
- Authority
- JP
- Japan
- Prior art keywords
- driven
- transmission piece
- side transmission
- drive
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
- A61C1/08—Machine parts specially adapted for dentistry
- A61C1/18—Flexible shafts; Clutches or the like; Bearings or lubricating arrangements; Drives or transmissions
- A61C1/185—Drives or transmissions
Landscapes
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、回転軸線の方向が互い
に異なる駆動軸と従動軸との間における、駆動トルクの
伝達に適する、磁力を利用した軸継ぎ手に関し、特に、
歯科用電動のハンドピース内のトルク伝達用として好適
な軸継ぎ手、及び同軸継ぎ手を備えた歯科用電動ハンド
ピースに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft coupling utilizing a magnetic force, which is suitable for transmitting a driving torque between a driving shaft and a driven shaft whose rotating axes are different from each other.
The present invention relates to a dental electric handpiece having a shaft joint and a coaxial joint suitable for transmitting torque in a dental electric handpiece.
【０００２】[0002]
【従来の技術】従来、歯科医療に用いられている、歯科
用電動ハンドピースには、ハンドピース後方に設けられ
ている駆動源に連結された駆動軸から、ハンドピース先
端のヘッドに設けられている歯科用工具へ、駆動源の回
転を伝達するための、回転駆動系が内蔵されている。前
記回転伝達系に含まれている従動軸は、前記駆動軸の回
転軸線方向とは異なった方向の回転軸線を有する場合が
あり、その場合に、区同軸と従動軸との間で回転を伝達
する手段として、例えば、特開昭５５−１２２５４０号
公報や、実開昭５９−１０６号公報に見られるように、
駆動軸と従動軸との間を、端面に歯が形成されている歯
車を用いるものが一般的である。図６は、前記のよう
な、従来の歯車を用いて構成されている回転駆動系を示
す、一部切り欠き断面図である。歯科用電動ハンドピー
スは、同図に示すように、手で把持する把持スリーブ１
の先端に、中継スリーブ２が着脱自在に取り付けられ、
さらに、中継スリーブ２の先端側に、ヘッドスリーブ５
を介して、ヘッド３が取り付けられている。前記のよう
に構成されている歯科用電動ハンドピースは、図示して
いない把持スリーブ１側に小型の電動モータやエアモー
タ等の回転駆動源が内蔵されたり、外部に設置されてい
る電動モータ等の回転駆動源の回転を、可撓性の動力伝
達ケーブル等を介して把持スリーブ１側に伝達し、把持
スリーブ１内部の駆動軸を回転させるようにしている。
そして、前記駆動軸の連結部１０の端部に取り付けられ
ている駆動歯車６から、前記駆動歯車６と噛み合ってい
る従動歯車７へ、回転が伝達されるようになっている。
前記従動歯車７は、従動軸の連結部１１の端部に取り付
けられており、従動歯車７の回転に伴って、前記従動軸
連結部１１が回転されるようになっている。従動軸は、
中継スリーブ２と、ヘッドスリーブ５の内部を貫通して
設けられており、前記従動歯車７が取り付けられている
端部と、反対側の端部には、ヘッド３に回転自在に支持
されている、歯科用工具４を回転させるための歯車（図
示せず）が取り付けられている。ヘッド３の内部には、
前記歯車と噛み合って、前記従動軸の回転を、歯科用工
具４の回転軸線の方向に直角に向きを変えて伝達する、
工具駆動歯車が設けられている。前記工具駆動歯車は、
下端に前記歯科用工具４を保持しているチャックを有し
て、ヘッド３内に回転自在に軸受支持されている工具軸
に取り付けられている。2. Description of the Related Art Conventionally, electric dental handpieces used in dentistry are provided on a head at the tip of the handpiece from a drive shaft connected to a drive source provided at the rear of the handpiece. It has a built-in rotary drive system for transmitting the rotation of the drive source to the existing dental tool. The driven shaft included in the rotation transmission system may have a rotation axis line in a direction different from the rotation axis direction of the drive shaft, in which case the rotation is transmitted between the coaxial section and the driven shaft. For example, as disclosed in JP-A-55-122540 and JP-A-59-106,
It is common to use a gear having teeth formed on the end face between the drive shaft and the driven shaft. FIG. 6 is a partially cutaway sectional view showing a rotary drive system configured by using a conventional gear as described above. As shown in the figure, the electric dental handpiece has a gripping sleeve 1 that is gripped by hand.
The relay sleeve 2 is detachably attached to the tip of the
Further, the head sleeve 5 is provided on the tip side of the relay sleeve 2.
The head 3 is attached via. The dental electric handpiece configured as described above includes a rotary drive source such as a small electric motor or an air motor built in the grip sleeve 1 side (not shown), or an electric motor installed outside. The rotation of the rotary drive source is transmitted to the side of the gripping sleeve 1 via a flexible power transmission cable or the like to rotate the drive shaft inside the gripping sleeve 1.
Then, the rotation is transmitted from the drive gear 6 attached to the end of the connecting portion 10 of the drive shaft to the driven gear 7 meshing with the drive gear 6.
The driven gear 7 is attached to an end portion of the driven shaft connecting portion 11, and the driven shaft connecting portion 11 is rotated as the driven gear 7 rotates. The driven axis is
The head sleeve 5 is provided so as to penetrate through the inside of the relay sleeve 2 and the head sleeve 5, and is rotatably supported by the head 3 at the end opposite to the end to which the driven gear 7 is attached. A gear (not shown) for rotating the dental tool 4 is attached. Inside the head 3,
Meshing with the gear and transmitting the rotation of the driven shaft by changing the direction at right angles to the direction of the rotation axis of the dental tool 4,
A tool drive gear is provided. The tool drive gear is
It has a chuck holding the dental tool 4 at its lower end, and is attached to a tool shaft rotatably supported in the head 3 by a bearing.
【０００３】[0003]
【発明が解決しようとする課題】前記のような、回転駆
動系を備えた従来の歯科用電動ハンドピースは、駆動軸
側の回転が、駆動歯車６と従動歯車７との噛み合いによ
って、従動軸側へ伝達されるように構成されているが、
把持スリーブ１と中継スリーブ２とは、奥歯等を治療す
る際に、作業性を良くするため、屈曲して連結されてい
る。そのため、把持スリーブ１側に設けられている、駆
動軸と、中継スリーブ２と、ヘッドスリーブ５の内部を
貫通する従動軸とは、一般に、相互の回転軸線の方向が
同方向となっている。そして、特に、歯科用電動ハンド
ピースに用いられる、歯科用工具４は、小径であり、歯
を削るためには、高い回転数が必要となるため、歯科用
電動ハンドピースの使用中に、回転軸線どうしが角度を
有して噛み合っている駆動歯車６と従動歯車７との間
に、騒音や振動を発生する問題があり、歯科の治療を快
適な環境の下で行うことができなかった。また、前述し
た構造の、従来の歯科用電動ハンドピースにおいては、
駆動歯車６と従動歯車７との噛み合い伝動によって、駆
動軸側から、ヘッド３に支持されている歯科用工具４へ
回転を伝達しているため、歯科用工具４先端等に、過剰
な負荷トルクが作用した場合には、歯科用工具４から、
駆動軸に至る駆動伝動系に、前記負荷トルクが作用し、
歯科用工具４や、駆動歯車６、従動歯車７等を損傷する
恐れがあった。そこで、本発明は、回転軸線の方向が、
同方向の駆動軸と従動軸との間で、磁気吸引力を用いて
回転を円滑に伝達することができ、騒音や振動の発生が
なく、しかも、過剰な負荷トルクから、駆動伝動系を保
護できるようにした、磁気軸継ぎ手を提供することを目
的とする。In the conventional dental electric handpiece having the rotary drive system as described above, the rotation on the drive shaft side is caused by the engagement of the drive gear 6 and the driven gear 7 with each other. It is configured to be transmitted to the
The gripping sleeve 1 and the relay sleeve 2 are bent and connected to each other in order to improve workability when treating a posterior tooth or the like. Therefore, the drive shaft, the relay sleeve 2, and the driven shaft that penetrates the inside of the head sleeve 5, which are provided on the side of the grip sleeve 1, generally have the same rotational axis. In particular, since the dental tool 4 used for the dental electric handpiece has a small diameter and a high rotation speed is required for cutting the tooth, the dental tool 4 rotates during use of the dental electric handpiece. There is a problem that noise and vibration are generated between the drive gear 6 and the driven gear 7 whose axes are engaged with each other at an angle, and dental treatment cannot be performed in a comfortable environment. Further, in the conventional dental electric handpiece having the above-mentioned structure,
Since the rotation is transmitted from the drive shaft side to the dental tool 4 supported by the head 3 by the meshing transmission of the drive gear 6 and the driven gear 7, excessive load torque is applied to the tip of the dental tool 4 and the like. When the action occurs, from the dental tool 4,
The load torque acts on the drive transmission system reaching the drive shaft,
The dental tool 4, the drive gear 6, the driven gear 7, etc. may be damaged. Therefore, in the present invention, the direction of the rotation axis is
Rotation can be smoothly transmitted between the drive shaft and driven shaft in the same direction by using magnetic attraction, no noise or vibration is generated, and the drive transmission system is protected from excessive load torque. The purpose is to provide a magnetic shaft coupling that is made possible.
【０００４】[0004]
【課題を解決するための手段】上記目的のために提供さ
れる、磁気軸継ぎ手は、駆動軸端部に設けられた駆動側
伝動ピースと、前記駆動側伝動ピースの端面と、端面を
対向して従動軸端部に設けられた、従動側伝達ピースと
を備えている。そして、前記駆動側伝動ピース及び従動
側伝動ピースは、少なくとも各々の端面近傍が、強磁性
体材料によって形成されていると共に、各々の端部の組
合わせでＮ極とＳ極とからなる磁気吸引構造を構成する
ように磁化されてなり、駆動軸の伝達トルクが、駆動軸
側伝動ピースと従動側伝動ピース間の磁気吸引力によっ
て、従動軸へ伝達されるように構成されている。あるい
は、前記駆動側伝動ピース及び従動側伝動ピースは、少
なくとも各々の端面近傍が、少なくとも各々の端面近傍
が、強磁性体材料によって形成されていると共に、少な
くとも一組のＮ極とＳ極とが、回転方向に交互に配置さ
れるように磁化されており、駆動軸の伝達トルクが、駆
動軸側伝動ピースと従動側伝動ピース間の磁気吸引力に
よって、従動軸へ伝達されるように構成されている。強
磁性体材料としては、永久磁石としての合金磁石（例え
ば、ＫＳ鋼、Ｗ鋼、ＭＫ鋼、アルニコ磁石等）や化合物
磁石（例えば、コバルトフェライト等のフェライト磁
石、ＳｍＣｏ５，Ｓｍ２Ｃｏ１７，Ｎｄ１５Ｆｅ７７Ｂ
８等の希土類磁石）が好ましいものとして使用される。
前記の磁気軸継ぎ手においては、駆動側伝動ピースの端
面と、従動側伝動ピースの端面との間に滑性隔離部材が
介在されていることが望ましい。また、前記駆動側伝動
ピースの端面と、従動側伝動ピースの端面の一方は、凸
状の部分球面に形成され、他方は、前記部分球面に適合
する凹状の部分球面に形成されていることも望ましい。A magnetic shaft coupling provided for the above purpose has a drive-side transmission piece provided at an end of a drive shaft, an end surface of the drive-side transmission piece, and an end surface opposed to each other. And a driven side transmission piece provided at the end of the driven shaft. The driving-side transmission piece and the driven-side transmission piece are formed of a ferromagnetic material at least in the vicinity of each end face thereof, and the magnetic attraction including the N pole and the S pole is formed by combining the respective end portions. The structure is magnetized so that the transmission torque of the drive shaft is transmitted to the driven shaft by the magnetic attraction force between the drive shaft side transmission piece and the driven side transmission piece. Alternatively, in the drive-side transmission piece and the driven-side transmission piece, at least each of the end faces and at least each of the end faces thereof are made of a ferromagnetic material, and at least one pair of N pole and S pole is formed. The magnets are magnetized so as to be alternately arranged in the rotation direction, and the transmission torque of the drive shaft is transmitted to the driven shaft by the magnetic attraction force between the drive shaft side transmission piece and the driven side transmission piece. ing. Examples of the ferromagnetic material include alloy magnets (for example, KS steel, W steel, MK steel, alnico magnets, etc.) as permanent magnets, compound magnets (for example, ferrite magnets such as cobalt ferrite, SmCo 5 , Sm 2 Co 17 , Nd 15 Fe 77 B
8 rare earth magnets) are preferably used.
In the above-mentioned magnetic shaft coupling, it is desirable that a slippery isolation member be interposed between the end surface of the driving side transmission piece and the end surface of the driven side transmission piece. Further, one of the end surface of the driving side transmission piece and the end surface of the driven side transmission piece may be formed as a convex partial spherical surface, and the other may be formed as a concave partial spherical surface that matches the partial spherical surface. desirable.
【０００５】[0005]
【作用】本発明の磁気軸継ぎ手は、駆動軸が回転する
と、駆動軸先端の駆動側伝動ピースが、前記駆動軸と共
に回転する。前記駆動側伝動ピース及び従動側伝動ピー
スは、各々の端面近傍が強磁性体材料によって形成さ
れ、各々の端部の組合わせでＮ極とＳ極とからなる磁気
吸引構造を構成するように磁化されているため、駆動軸
の伝達トルクが、駆動軸側伝動ピースと従動側伝動ピー
ス間の磁気吸引力によって、従動軸へ伝達される。ま
た、駆動側伝動ピースの端面が、その回転方向にＮ極
と、Ｓ極とが、交互に配置されるように磁化され、ま
た、前記駆動側伝動ピースの端面に対向している、従動
側伝動ピースの端面も、駆動側伝動ピースと同様に、回
転方向に、Ｎ極と、Ｓ極とが、交互に配置されている場
合も、それぞれの伝動ピースの異極の間では、吸引力が
作用する。いずれの場合も、駆動側伝動ピースの回転に
よって、従動側伝動ピースは、前記吸引力によって引き
ずられて回転する。駆動側伝動ピースから、従動側伝動
ピースへの回転トルクの伝達作用は、磁気吸引力の作用
によるものであるので、駆動軸の回転軸線の方向と、従
動軸の回転軸線の方向が異なっている場合でも、駆動軸
から、従動軸へ回転が伝達される。したがって、歯科用
電動ハンドピースに適用すれば、モノアングル型、コン
トラアングル型、ライトアングル型等のアングル型ハン
ドピースの角度を自由に変えることができる。また、従
動軸側に、過大な負荷トルクが加わった場合には、駆動
側伝動ピースと、従動側伝動ピースとの間で、回転がス
リップし、駆動軸や従動軸等の回転伝達系の各部材は、
過大な負荷トルクから保護されて破損等が防止される。
さらに、駆動側伝動ピースの端面と、従動側伝動ピース
の端面との間に、滑性隔離部材が介在されている場合に
は、駆動側伝動ピースの端面と、従動側伝動ピースの端
面との間の摩擦が、滑性隔離部材によって低減され、両
伝動ピース間の摩耗が抑制され、また、滑性隔離部材に
よって、回転に伴う騒音や、振動が吸収される。そし
て、前記駆動側伝動ピースの端面と、従動側伝動ピース
の端面の一方は、凸状の部分球面に形成され、他方は、
前記部分球面に適合する、凹状の部分球面に形成されて
いる場合には、駆動側伝達ピースと、従動側伝達ピース
との間に作用する磁気吸引力が高まり、駆動軸の回転軸
線の方向と、従動軸の回転軸線の方向との相違が大きい
場合にも、高い伝達トルクが維持される。In the magnetic shaft joint of the present invention, when the drive shaft rotates, the drive-side transmission piece at the tip of the drive shaft rotates together with the drive shaft. The drive-side transmission piece and the driven-side transmission piece are magnetized so that the vicinity of each end face is made of a ferromagnetic material, and a combination of the end portions forms a magnetic attraction structure consisting of an N pole and an S pole. Therefore, the transmission torque of the drive shaft is transmitted to the driven shaft by the magnetic attraction force between the drive shaft side transmission piece and the driven side transmission piece. Further, the end face of the drive side transmission piece is magnetized so that N poles and S poles are alternately arranged in the rotation direction, and the driven side faces the end face of the drive side transmission piece. Similarly to the drive-side transmission piece, the end surface of the transmission piece also has a suction force between the different poles of the transmission pieces even when the N poles and the S poles are alternately arranged in the rotation direction. To work. In any case, the driven-side transmission piece is rotated by being dragged by the suction force by the rotation of the driving-side transmission piece. Since the action of transmitting the rotational torque from the drive-side transmission piece to the driven-side transmission piece is due to the action of the magnetic attraction force, the direction of the rotation axis of the drive shaft and the direction of the rotation axis of the driven shaft are different. Even in this case, the rotation is transmitted from the drive shaft to the driven shaft. Therefore, when applied to a dental electric handpiece, the angle of an angle type handpiece such as a mono-angle type, a contra-angle type and a right-angle type can be freely changed. Further, when an excessive load torque is applied to the driven shaft side, rotation slips between the drive side transmission piece and the driven side transmission piece, and each of the rotation transmission systems such as the drive shaft and the driven shaft is rotated. The member is
Protects against excessive load torque and prevents damage.
Further, when the lubricity separating member is interposed between the end surface of the driving side transmission piece and the end surface of the driven side transmission piece, the end surface of the driving side transmission piece and the end surface of the driven side transmission piece are Friction between them is reduced by the slippery isolation member, wear between both transmission pieces is suppressed, and noise and vibration due to rotation are absorbed by the slippery isolation member. Then, one of the end surface of the driving side transmission piece and the end surface of the driven side transmission piece is formed into a convex partial spherical surface, and the other is
When it is formed into a concave partial spherical surface that fits the partial spherical surface, the magnetic attraction force acting between the driving side transmission piece and the driven side transmission piece is increased, and the direction of the rotation axis of the drive shaft is changed. Even when the difference between the driven shaft and the direction of the rotation axis is large, the high transmission torque is maintained.
【０００６】[0006]
【実施例】以下、図面に基づいて本発明の実施例を詳細
に説明する。図１は、本発明の磁気軸継手を用いた、歯
科用電動ハンドピースの一部切欠断面図であって、同図
に記載している番号で、前述した、図６において用いら
れている番号と同じものについては、図６中の部材と同
一の部材を示している。図１に示す、歯科用電動ハンド
ピースの構造の特徴は、前記従来構造のものと比較し
て、駆動軸と従動軸との間の回転の伝達手段に、図６に
おける、駆動歯車６や、従動歯車７のような、歯車伝動
手段を用いていない点にある。すなわち、図１の歯科用
電動ハンドピースでは、駆動軸と従動軸との間で、回転
を伝達する手段として、駆動側伝動ピース８と従動側伝
動ピース９とから構成されている、本発明の磁気軸継手
が用いられている。図２は、図１に示す歯科用電動ハン
ドピースのＸ−Ｘ断面図で、前記磁気軸継手の、回転軸
線に沿った断面を示すものである。同図に示すように、
駆動側伝動ピース８と、従動側伝動ピース９とは、互い
に端面を対向した状態で配置されている。そして、駆動
側伝動ピース８は、図示しない駆動軸に固定された、駆
動軸連結部１０と、同部１０の端面に固定された、駆動
側磁石部材１２と、駆動側磁石部材１２の駆動軸連結部
１０側と、反対側の端面に設けられた、滑性隔離部材１
４とから構成されている。また、前記駆動側伝動ピース
８と対向した、従動側伝動ピース９は、駆動側伝動ピー
ス８と同様の構造となっており、図示しない、従動軸に
固定された、従動軸連結部１１と、従動軸連結部１１の
端面に固定された、従動側磁石部材１３と、従動側磁石
部材１３の従動軸連結部１１側と、反対側に設けられ
た、滑性隔離部材１５とから構成されている。前記の磁
気軸継手の構成において、駆動軸連結部１０と、従動軸
連結部１１は、金属、合成樹脂等の材料で形成すること
ができ、また、図示しない、駆動軸、従動軸の端部に、
一体に形成することができる。駆動側磁石部材１２及
び、従動側磁石部材１３は、永久磁石となる強磁性体材
料で形成されており、本実施例の磁気軸継手において
は、図２に示すように、駆動側磁石部材１２と、従動側
磁石部材１３とは、それぞれの直径方向に、Ｎ極とＳ極
とが生じるように磁化されている。Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a partially cutaway cross-sectional view of a dental electric handpiece using the magnetic shaft coupling of the present invention, which is the number shown in the figure and used in FIG. 6 described above. About the same thing as, the same member as the member in FIG. 6 is shown. The structure of the dental electric handpiece shown in FIG. 1 is characterized in that, as compared with the structure of the conventional structure, the driving gear 6 and the driving gear 6 in FIG. The point is that no gear transmission means such as the driven gear 7 is used. That is, in the electric dental handpiece of FIG. 1, the drive-side transmission piece 8 and the driven-side transmission piece 9 are provided as means for transmitting rotation between the drive shaft and the driven shaft. Magnetic shaft couplings are used. FIG. 2 is a cross-sectional view of the dental electric handpiece shown in FIG. 1, taken along the line XX, showing a cross section of the magnetic shaft coupling taken along the axis of rotation. As shown in the figure,
The drive-side transmission piece 8 and the driven-side transmission piece 9 are arranged with their end surfaces facing each other. The drive-side transmission piece 8 is fixed to the drive shaft (not shown), the drive-side magnet member 12 fixed to the end face of the drive-shaft connecting portion 10, and the drive shaft of the drive-side magnet member 12. The sliding isolation member 1 provided on the end surface on the side opposite to the connecting portion 10 side.
And 4. Further, the driven side transmission piece 9 facing the driving side transmission piece 8 has a structure similar to that of the driving side transmission piece 8, and a driven shaft connecting portion 11 fixed to the driven shaft (not shown), The driven-side magnet member 13 is fixed to the end surface of the driven-shaft connecting portion 11, the driven-shaft connecting portion 11 side of the driven-side magnet member 13, and the lubricous isolation member 15 provided on the opposite side. There is. In the structure of the magnetic shaft coupling described above, the drive shaft connecting portion 10 and the driven shaft connecting portion 11 can be formed of a material such as metal or synthetic resin, and the end portions of the drive shaft and the driven shaft (not shown) can be formed. To
It can be integrally formed. The drive-side magnet member 12 and the driven-side magnet member 13 are made of a ferromagnetic material serving as a permanent magnet. In the magnetic shaft coupling of this embodiment, as shown in FIG. And the driven-side magnet member 13 are magnetized so that an N pole and an S pole are generated in the respective diametrical directions.
【０００７】図３に示すように、Ｎ極とＳ極とは、駆動
側磁石部材１２及び従動側磁石部材１３の一つの直径を
境に形成されている。従って、Ｎ極とＳ極とは、駆動側
磁石部材１２及び従動側磁石部材１３の回転方向に対し
て、交互になるように配置されている。本実施例におい
ては、駆動側磁石部材１２と、従動側磁石部材１３とに
形成されるＮ極とＳ極とは、一組であるが、駆動側磁石
部材１２と、従動側磁石部材１３の回転方向に沿って、
複数組設けることも可能であり、例えば、Ｎ極とＳ極と
を、２組設ける場合には、駆動側磁石部材１２及び従動
側磁石部材１３の、それぞれの中心に対して、９０度毎
に、Ｎ極とＳ極とが交互に配列されるように磁化すれば
よい。駆動側磁石部材１２と、従動側磁石部材１３とに
設ける磁極の数は、同数とすることが好ましい。駆動側
磁石部材１２と、従動側磁石部材１３を形成する強磁性
体材料としては、強力な磁石となる、希土類系の高性能
希土類磁石素材等が好ましい。滑性隔離部材１４と、滑
性隔離部材１５とは、磁気吸引力による、駆動側磁石部
材１２と、従動側磁石部材１３との直接の接触による摩
擦を防ぐために設けられているものであって、ポリエチ
レン、ナイロン、テフロン、シリコン樹脂等の滑性のあ
る材料によって形成されている。前述したように構成さ
れている、本発明の軸継手は、図１に示すように、駆動
側伝動ピース８と、従動側伝動ピース９とを対向して配
置すると、駆動側伝動ピース８の駆動側磁石部材１２の
磁極と、従動側伝動ピース９の従動側磁石部材１３の磁
極とが、相互間の磁気吸引力によって、異極どうし対向
するように引きつけ合う。そして、図示しない駆動軸
が、モータ等の駆動源から伝達される駆動トルクによっ
て、回転すると、駆動側伝動ピース８の回転につれて、
駆動側磁石部材１２と、従動側磁石部材１３の磁極間の
吸引力によって、従動側伝動ピース９に駆動トルクが伝
達され、従動軸が回転駆動される。As shown in FIG. 3, the N pole and the S pole are formed with one diameter of the driving side magnet member 12 and the driven side magnet member 13 as a boundary. Therefore, the N poles and the S poles are arranged alternately with respect to the rotation directions of the drive-side magnet member 12 and the driven-side magnet member 13. In this embodiment, the driving-side magnet member 12 and the driven-side magnet member 13 have a pair of N pole and S-pole, but the driving-side magnet member 12 and the driven-side magnet member 13 have the same structure. Along the direction of rotation,
It is also possible to provide a plurality of sets. For example, in the case of providing two sets of N poles and S poles, the drive side magnet member 12 and the driven side magnet member 13 are provided at intervals of 90 degrees with respect to their respective centers. , N poles and S poles may be magnetized so as to be arranged alternately. It is preferable that the driving-side magnet member 12 and the driven-side magnet member 13 have the same number of magnetic poles. As the ferromagnetic material forming the drive-side magnet member 12 and the driven-side magnet member 13, a rare earth-based high-performance rare earth magnet material that becomes a strong magnet is preferable. The lubricous isolation member 14 and the lubricous isolation member 15 are provided to prevent friction due to direct contact between the drive-side magnet member 12 and the driven-side magnet member 13 due to a magnetic attraction force. It is made of a slippery material such as polyethylene, nylon, Teflon, or silicone resin. In the shaft coupling of the present invention configured as described above, when the drive side transmission piece 8 and the driven side transmission piece 9 are arranged to face each other as shown in FIG. 1, the drive side transmission piece 8 is driven. The magnetic pole of the side magnet member 12 and the magnetic pole of the driven side magnet member 13 of the driven side transmission piece 9 are attracted to each other by magnetic attraction between them so that the opposite poles face each other. Then, when the drive shaft (not shown) is rotated by the drive torque transmitted from the drive source such as the motor, as the drive side transmission piece 8 rotates,
The driving force is transmitted to the driven side transmission piece 9 by the attraction force between the magnetic poles of the driving side magnet member 12 and the driven side magnet member 13, and the driven shaft is rotationally driven.
【０００８】駆動側伝動ピース８と、従動側伝動ピース
９間の駆動トルクの伝達は、歯車伝動のように、機械的
な連結によって行われるものではないので、駆動軸と従
動軸との回転軸線の方向が異なっている場合でも、騒音
や振動が生じることなく、円滑な状態で行われる。な
お、駆動側磁石部材１２と従動側磁石部材１３とをそれ
ぞれ取り付ける、駆動軸連結部１０と、従動軸連結部１
１とを、鋼鉄等の強磁性体材料で形成すると、駆動側磁
石部材１２と、従動側磁石部材１３から出る磁束が、磁
気抵抗の小さい駆動軸連結部１０と、従動軸連結部１１
の内部をそれぞれ通過して、駆動側磁石部材１２と、従
動側磁石部材１３の、対向している側の端面の磁気吸引
力が弱まるため、駆動軸連結部１０と、従動軸連結部１
１とを、金属材料によって、形成する場合には、非磁性
金属材料を用いることが好ましい。次に、図４は、本発
明の磁気軸継手の別の実施例を示すものである。同図に
示す実施例では、駆動側磁石部材１２と、従動側磁石部
材１３との、互いに対向する端面の形状を、駆動側磁石
部材１２側では、凹状の球面の一部で形成し、従動側磁
石部材１３側では、駆動側磁石部材１２側の端面に適合
するように、凸状の球面の一部として形成している。ま
た、従動側磁石部材１３の、駆動側磁石部材１２と対向
する面には、滑性隔離部材１６が設けられている。図４
の実施例では、駆動軸の回転軸線の方向と、従動軸の回
転軸線の方向との相違が大きい場合でも、駆動側磁石部
材１２と、従動側磁石部材１３との間の隙間が小さくな
り、両者の間に作用する磁気吸引力が低下しないので、
高い伝達トルクを維持することができる。本実施例で
は、駆動側磁石部材１２の端面を、凹状に、従動側磁石
部材１３の端面を、凸状に形成しているが、逆に従動側
磁石部材１３側を、凹状に、駆動側磁石部材１２側を、
凸状に形成してもよい。また、本実施例では、滑性隔離
部材１６を、従動側磁石部材１３側に設けているが、逆
に駆動側磁石部材１２側に設けてもよい。The transmission of the driving torque between the driving side transmission piece 8 and the driven side transmission piece 9 is not performed by mechanical connection unlike the gear transmission, so that the rotation axis of the driving shaft and the driven shaft is Even if the directions are different, the operation is performed smoothly without noise or vibration. The drive-side magnet member 12 and the driven-side magnet member 13 are attached to the drive-shaft connecting portion 10 and the driven-shaft connecting portion 1, respectively.
When 1 is formed of a ferromagnetic material such as steel, the magnetic flux generated from the drive-side magnet member 12 and the driven-side magnet member 13 has a small magnetic resistance, that is, the drive shaft connecting portion 10 and the driven shaft connecting portion 11
Of the drive-side magnet member 12 and the driven-side magnet member 13, the magnetic attraction force between the facing end surfaces of the drive-side magnet member 12 and the driven-side magnet member 13 is weakened.
When 1 and 2 are formed of a metal material, it is preferable to use a non-magnetic metal material. Next, FIG. 4 shows another embodiment of the magnetic shaft coupling of the present invention. In the embodiment shown in the figure, the end faces of the driving-side magnet member 12 and the driven-side magnet member 13 which face each other are formed by a part of a concave spherical surface on the driving-side magnet member 12 side. On the side magnet member 13 side, it is formed as a part of a convex spherical surface so as to match the end surface on the drive side magnet member 12 side. Further, a sliding isolation member 16 is provided on the surface of the driven-side magnet member 13 facing the driving-side magnet member 12. FIG.
In the embodiment, even if the direction of the rotation axis of the drive shaft and the direction of the rotation axis of the driven shaft are large, the gap between the drive-side magnet member 12 and the driven-side magnet member 13 becomes small, Since the magnetic attraction force acting between the two does not decrease,
A high transmission torque can be maintained. In the present embodiment, the end surface of the drive-side magnet member 12 is formed in a concave shape, and the end surface of the driven-side magnet member 13 is formed in a convex shape. The magnet member 12 side,
It may be formed in a convex shape. In addition, in the present embodiment, the lubricous isolation member 16 is provided on the driven side magnet member 13 side, but it may be provided on the drive side magnet member 12 side conversely.
【０００９】また、図５は、本発明の磁気軸継手の別の
実施例の図１におけるＸ−Ｘ断面図であり、すなわち
前記駆動側磁石部材１２と、従動側磁石部材１３とは、
それらの端部の組合わせで一対のＮ極とＳ極とからなる
磁気吸引構造を構成しているもので、駆動軸の伝達トル
クが、駆動軸側伝動ピース８と従動側伝動ピース９間の
磁気吸引力によって、従動軸へ伝達される。本実施例の
場合においても、前記実施例において示したごとき構
造、例えば図４に示すごとく、駆動側磁石部材１２と、
従動側磁石部材１３との、互いに対向する端面の形状
を、駆動側磁石部材１２側では、凹状の球面の一部で形
成し、従動側磁石部材１３側では、駆動側磁石部材１２
側の端面に適合するように、凸状の球面の一部として形
成し、また、従動側磁石部材１３の、駆動側磁石部材１
２と対向する面には、滑性隔離部材１６を設けて構成し
てもよい。FIG. 5 is a sectional view taken along the line XX in FIG. 1 of another embodiment of the magnetic shaft coupling of the present invention.
The drive-side magnet member 12 and the driven-side magnet member 13 are
A combination of these ends constitutes a magnetic attraction structure consisting of a pair of N pole and S pole. The transmission torque of the drive shaft is between the drive shaft side transmission piece 8 and the driven side transmission piece 9. It is transmitted to the driven shaft by the magnetic attraction force. Also in the case of this embodiment, the structure as shown in the above embodiment, for example, as shown in FIG.
The end faces of the driven magnet member 13 facing each other are formed by a part of a concave spherical surface on the driving magnet member 12 side, and on the driven magnet member 13 side, the driving magnet member 12 side.
The driving-side magnet member 1 of the driven-side magnet member 13 is formed as a part of a convex spherical surface so as to conform to the end face on the side.
You may comprise by providing the lubricous isolation member 16 in the surface which opposes 2.
【００１０】さらに、前述した各実施例においては、滑
性隔離部材を、駆動側磁石部材１２と、従動側磁石部材
１３との間に介在させているが、駆動側磁石部材１２
と、従動側磁石部材１３との間の摩擦抵抗が小さい場合
には、必ずしも介在させる必要はない。特に、駆動側磁
石部材１２と、従動側磁石部材１３の材料として、合成
樹脂材料中に、磁性粉を混入して形成した、プラスチッ
ク磁石等を用いる場合には、材料自体の滑性が大きいた
め、滑性隔離部材は不要となる。また、前記滑性隔離部
材は、駆動側磁石部材１２や、従動側磁石部材１３の対
向する端面に、被覆層として、薄膜状にコーティングし
て形成することもできる。以上の説明において、本発明
の磁気軸継手の実施例として、歯科用電動ハンドピース
内部の、駆動伝動系に用いた例を示したが、本発明の磁
気軸継手の用途は、歯科用電動ハンドピースに限定され
るものではなく、他の機械・器具類の駆動伝動系の軸継
手として、幅広いの分野で利用することが可能である。Further, in each of the above-mentioned embodiments, the sliding isolation member is interposed between the drive side magnet member 12 and the driven side magnet member 13. However, the drive side magnet member 12 is used.
And when the frictional resistance between the driven magnet member 13 and the driven magnet member 13 is small, it is not always necessary to intervene. In particular, when a plastic magnet or the like formed by mixing magnetic powder into a synthetic resin material is used as the material of the driving-side magnet member 12 and the driven-side magnet member 13, the material itself has large slipperiness. No need for a lubricious isolation member. Further, the slipping isolation member may be formed by coating the opposing end surfaces of the drive-side magnet member 12 and the driven-side magnet member 13 in a thin film form as a coating layer. In the above description, as an example of the magnetic shaft coupling of the present invention, an example of use in a drive transmission system inside a dental electric handpiece was shown, but the application of the magnetic shaft coupling of the present invention is a dental electric hand. The present invention is not limited to the piece, and can be used in a wide variety of fields as a shaft coupling for a drive transmission system of other machines and instruments.
【００１１】[0011]
【発明の効果】以上に説明したように、本発明の、磁気
軸継ぎ手によれば、回転軸線方向の、互いに異なった駆
動軸から従動軸へ、例えば各種アングル型の歯科用電動
ハンドピース等において、角度を可変にして、回転の伝
達を円滑に行うことができる。そして、駆動軸と従動軸
との間の、駆動トルクの伝達は、磁気吸引力を利用した
ものであるので、歯車の噛み合いによる、伝動手段を用
いた場合のように、回転時に、騒音や振動を発生するこ
とがない。従って、特に、歯科用の電動ハンドピース内
部の回転伝達系に用いた場合には、快適な環境で治療を
行うことができる。また、本発明の磁気軸継ぎ手によれ
ば、従動軸側に、過大な負荷トルクが加わった場合に
は、駆動側伝動ピースと、従動側伝動ピースとの間で、
回転がスリップし、駆動軸や、従動軸等の回転伝達系の
各部材を、過大な負荷トルクによる破損から、保護する
ことができる。しかも、本発明の磁気軸継ぎ手では、通
常の、負荷トルクを制限するために用いられている、ス
リップクラッチや、トルクリミッタのように、経時的な
劣化を起こし易い、摩擦部材間で、駆動トルクを伝達す
る構造によらず、磁気吸引力によって、駆動トルクを伝
達する構造であるため、長期にわたって使用しても、伝
達トルクの低下をきたす恐れがない。As described above, according to the magnetic shaft coupling of the present invention, from different drive shafts to driven shafts in the rotation axis direction, for example, in various angle type electric dental handpieces and the like. By changing the angle, the rotation can be smoothly transmitted. Since the driving torque is transmitted between the drive shaft and the driven shaft by using the magnetic attraction force, noise and vibration are generated during rotation as in the case of using the transmission means by meshing the gears. Never occurs. Therefore, in particular, when used in a rotation transmission system inside a dental electric handpiece, treatment can be performed in a comfortable environment. Further, according to the magnetic shaft coupling of the present invention, on the driven shaft side, when an excessive load torque is applied, between the drive side transmission piece and the driven side transmission piece,
The rotation slips, and each member of the rotation transmission system such as the drive shaft and the driven shaft can be protected from damage due to excessive load torque. Moreover, in the magnetic shaft coupling of the present invention, the drive torque between the friction members, which is likely to be deteriorated with time, such as a slip clutch or a torque limiter which is usually used for limiting the load torque, is used. Since the drive torque is transmitted by the magnetic attraction force regardless of the transmission structure, there is no fear that the transmission torque will decrease even if the drive torque is used for a long period of time.
【００１２】さらに、駆動側伝動ピースの端面と、従動
側伝動ピースの端面との間に、滑性隔離部材を介在され
ている場合には、前記の効果に加えて、駆動側伝動ピー
スの端面と、従動側伝動ピースの端面との間の摩擦が低
減され、回転時の騒音や振動を、さらに少なくすること
ができる。また、駆動軸と、従動軸との間で、回転軸線
方向の差によって、駆動側伝動ピースの端面と、従動側
伝動ピースの端面との間で滑りが大きくなっても、滑性
隔離部材によって、両者は直接接触しないので、摩耗が
防止され、高速回転に対する耐久性を向上させることが
できる。また、駆動側伝動ピースの端面と、従動側伝動
ピースの端面の一方は、凸状の部分球面に形成され、他
方は、前記部分球面に適合する、凹状の部分球面に形成
されている場合には、駆動側伝達ピースと、従動側伝達
ピースとの間に作用する磁気吸引力を高めることがで
き、駆動軸の回転軸線の方向と、従動軸の回転軸線の方
向との相違が大きい場合にも、高い伝達トルクを維持す
ることができる。In addition to the above-mentioned effects, when a sliding isolation member is interposed between the end surface of the driving side transmission piece and the end surface of the driven side transmission piece, the end surface of the driving side transmission piece is added. And the friction between the driven side transmission piece and the end surface of the driven side transmission piece are reduced, and noise and vibration during rotation can be further reduced. In addition, even if the slippage between the end surface of the drive-side transmission piece and the end surface of the driven-side transmission piece becomes large due to the difference in the rotational axis direction between the drive shaft and the driven shaft, the sliding isolation member prevents Since the two do not come into direct contact with each other, abrasion is prevented and durability against high-speed rotation can be improved. Further, when one of the end surface of the driving side transmission piece and the end surface of the driven side transmission piece is formed into a convex partial spherical surface, and the other is formed into a concave partial spherical surface that matches the partial spherical surface. Is capable of increasing the magnetic attraction force acting between the drive-side transmission piece and the driven-side transmission piece, and when the difference between the direction of the rotation axis of the drive shaft and the direction of the rotation axis of the driven shaft is large. Also, a high transmission torque can be maintained.
【図１】本発明実施例の磁気軸継ぎ手を内蔵した歯科用
電動ハンドピースの一部切り欠き断面図である。FIG. 1 is a partially cutaway sectional view of an electric dental handpiece incorporating a magnetic shaft joint according to an embodiment of the present invention.
【図２】本発明実施例の磁気軸継ぎ手の構造を示す断面
図である。FIG. 2 is a cross-sectional view showing the structure of a magnetic shaft joint according to an embodiment of the present invention.
【図３】本発明実施例の磁気軸継ぎ手の磁極の配置を示
す図である。FIG. 3 is a diagram showing an arrangement of magnetic poles of the magnetic shaft coupling of the embodiment of the present invention.
【図４】本発明実施例の磁気軸継ぎ手の別の実施例を示
す図である。FIG. 4 is a view showing another embodiment of the magnetic shaft coupling of the embodiment of the present invention.
【図５】本発明実施例の磁気軸継ぎ手の他の実施例の構
造を示す断面図である。FIG. 5 is a cross-sectional view showing the structure of another embodiment of the magnetic shaft coupling of the embodiment of the present invention.
【図６】従来の歯科用電動ハンドピースの構造を示す、
一部切り欠き断面図である。FIG. 6 shows the structure of a conventional dental electric handpiece,
It is a partially cutaway sectional view.
１ 把持スリーブ ２ 中継スリーブ ３ ヘッド ４ 歯科用工具 ５ ヘッドスリーブ ６ 駆動歯車 ７ 従動歯車 ８ 駆動側伝動ピース ９ 従動側伝動ピース １０ 駆動軸連結部 １１ 従動軸連結部 １２ 駆動側磁石部材 １３ 従動側磁石部材 １４、１５、１６ 滑性
隔離部材DESCRIPTION OF SYMBOLS 1 Gripping sleeve 2 Relay sleeve 3 Head 4 Dental tool 5 Head sleeve 6 Drive gear 7 Driven gear 8 Drive side transmission piece 9 Driven side transmission piece 10 Drive shaft connecting portion 11 Driven shaft connecting portion 12 Drive side magnet member 13 Driven side magnet Member 14, 15, 16 Sliding isolation member
Claims (5)
スと、前記駆動側伝動ピースの端面と、端面を対向して
従動軸端部に設けられた、従動側伝達ピースとを備え、
前記駆動側伝動ピース及び従動側伝動ピースは、少なく
とも各々の端面近傍が、強磁性体材料によって形成され
ていると共に、各々の端部の組合わせでＮ極とＳ極とか
らなる磁気吸引構造を構成するように磁化されてなり、
駆動軸の伝達トルクが、駆動軸側伝動ピースと従動側伝
動ピース間の磁気吸引力によって、従動軸へ伝達される
ように構成されていることを特徴とする磁気軸継ぎ手。1. A drive-side transmission piece provided at an end of a drive shaft, an end surface of the drive-side transmission piece, and a driven-side transmission piece provided at an end of the driven shaft with the end surfaces facing each other.
The drive-side transmission piece and the driven-side transmission piece have a magnetic attraction structure in which at least their respective end faces are made of a ferromagnetic material, and a combination of the respective ends forms an N pole and an S pole. Be magnetized to make up,
A magnetic shaft coupling characterized in that the transmission torque of the drive shaft is transmitted to the driven shaft by a magnetic attraction force between the drive shaft side transmission piece and the driven side transmission piece.
スと、前記駆動側伝動ピースの端面と、端面を対向して
従動軸端部に設けられた、従動側伝達ピースとを備え、
前記駆動側伝動ピース及び従動側伝動ピースは、少なく
とも各々の端面近傍が、強磁性体材料によって形成され
ていると共に、少なくとも一組のＮ極とＳ極とが、回転
方向に交互に配置されるように磁化されており、駆動軸
の伝達トルクが、駆動軸側伝動ピースと従動側伝動ピー
ス間の磁気吸引力によって、従動軸へ伝達されるように
構成されていることを特徴とする磁気軸継ぎ手。2. A drive-side transmission piece provided at the end of the drive shaft, an end surface of the drive-side transmission piece, and a driven-side transmission piece provided at the end of the driven shaft with the end surfaces facing each other.
The drive-side transmission piece and the driven-side transmission piece are formed of a ferromagnetic material at least in the vicinity of their respective end faces, and at least one set of N poles and S poles are alternately arranged in the rotational direction. The magnetic shaft is characterized in that the transmission torque of the drive shaft is transmitted to the driven shaft by the magnetic attraction force between the drive shaft side transmission piece and the driven side transmission piece. Fitting.
伝動ピースの端面との間に滑性隔離部材が介在されてい
ることを特徴とする請求項１又は２に記載された磁気軸
継ぎ手。3. The magnetic shaft coupling according to claim 1, wherein a slipping isolation member is interposed between the end surface of the drive-side transmission piece and the end surface of the driven-side transmission piece. .
伝動ピースの端面の一方は、凸状の部分球面に形成さ
れ、他方は、前記部分球面に適合する凹状の部分球面に
形成されていることを特徴とする請求項１ないし３のい
ずれかに記載された磁気軸継ぎ手。4. An end surface of the driving-side transmission piece and one of the end surfaces of the driven-side transmission piece are formed as convex partial spherical surfaces, and the other is formed as a concave partial spherical surface that matches the partial spherical surfaces. The magnetic shaft coupling according to any one of claims 1 to 3, wherein
用軸継ぎ手として、請求項１ないし４のいずれかに記載
の磁気軸継ぎ手を備えてなることを特徴とする歯科用電
動ハンドピース。5. A dental electric handpiece comprising the magnetic shaft joint according to claim 1 as a torque transmitting shaft joint in the dental electric handpiece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7080860A JPH08243113A (en) | 1995-03-14 | 1995-03-14 | Magnetic axis joint and dental electrical hand piece equipped with the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7080860A JPH08243113A (en) | 1995-03-14 | 1995-03-14 | Magnetic axis joint and dental electrical hand piece equipped with the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08243113A true JPH08243113A (en) | 1996-09-24 |
Family
ID=13730101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7080860A Pending JPH08243113A (en) | 1995-03-14 | 1995-03-14 | Magnetic axis joint and dental electrical hand piece equipped with the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08243113A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10061900A1 (en) * | 2000-12-12 | 2002-06-27 | Sirona Dental Systems Gmbh | Dental instrument with a powered tool and a transmission device with magnetic coupling elements |
| JP2009226176A (en) * | 2008-03-24 | 2009-10-08 | Yoshida Dental Mfg Co Ltd | Power transmission system of dental handpiece |
| EP2596760A1 (en) * | 2011-11-24 | 2013-05-29 | Nakanishi Inc. | Dental handpiece |
| JP2015502181A (en) * | 2011-09-13 | 2015-01-22 | メドロボティクス コーポレイション | Highly articulated probe having anti-twist link arrangement, formation method thereof, and medical procedure execution method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5875545A (en) * | 1981-10-08 | 1983-05-07 | コルモ−ゲン・テクノロジイズ・コ−ポレイシヨン | Manipulation tool equipped with integrated motor |
| JPH06101745A (en) * | 1991-06-12 | 1994-04-12 | Mitsubishi Materials Corp | Article driving device |
| JPH06351210A (en) * | 1993-06-08 | 1994-12-22 | Ibiden Co Ltd | Brushless motor |
| JPH07308060A (en) * | 1994-05-11 | 1995-11-21 | Yaskawa Electric Corp | Magnetic coupling device |
-
1995
- 1995-03-14 JP JP7080860A patent/JPH08243113A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5875545A (en) * | 1981-10-08 | 1983-05-07 | コルモ−ゲン・テクノロジイズ・コ−ポレイシヨン | Manipulation tool equipped with integrated motor |
| JPH06101745A (en) * | 1991-06-12 | 1994-04-12 | Mitsubishi Materials Corp | Article driving device |
| JPH06351210A (en) * | 1993-06-08 | 1994-12-22 | Ibiden Co Ltd | Brushless motor |
| JPH07308060A (en) * | 1994-05-11 | 1995-11-21 | Yaskawa Electric Corp | Magnetic coupling device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10061900A1 (en) * | 2000-12-12 | 2002-06-27 | Sirona Dental Systems Gmbh | Dental instrument with a powered tool and a transmission device with magnetic coupling elements |
| DE10061900B4 (en) * | 2000-12-12 | 2007-10-31 | Sirona Dental Systems Gmbh | Dental instrument with a driven tool and a transmission device with magnetic coupling elements |
| JP2009226176A (en) * | 2008-03-24 | 2009-10-08 | Yoshida Dental Mfg Co Ltd | Power transmission system of dental handpiece |
| JP2015502181A (en) * | 2011-09-13 | 2015-01-22 | メドロボティクス コーポレイション | Highly articulated probe having anti-twist link arrangement, formation method thereof, and medical procedure execution method |
| US9757856B2 (en) | 2011-09-13 | 2017-09-12 | Medrobotics Corporation | Highly articulated probes with anti-twist link arrangement, methods of formation thereof, and methods of performing medical procedures |
| EP2596760A1 (en) * | 2011-11-24 | 2013-05-29 | Nakanishi Inc. | Dental handpiece |
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