JPH0338852B2

JPH0338852B2 -

Info

Publication number: JPH0338852B2
Application number: JP58066831A
Authority: JP
Inventors: Aibofunaa Yuugen
Original assignee: Karutenbatsuha Unto Fuoikuto Unto Co GmbH
Current assignee: Karutenbatsuha Unto Fuoikuto Unto Co GmbH
Priority date: 1982-04-23
Filing date: 1983-04-15
Publication date: 1991-06-12
Also published as: FR2525462B3; ATA139283A; FR2525462A1; AT377175B; JPS58190435A; DE3215193A1; DE3215193C2

Description

【発明の詳細な説明】本発明は、まつすぐな、あるいは屈曲した歯科
医療用ハンドピースに関し、特に、処置用工具が
取り付けられた先端と供給ホースを有する供給部
に連結された基端部とを備えた細長いハンドピー
スであつて、ハンドピース内に配置されハンドピ
ースの略全長に渡つて延び処置用工具を動かすた
めの機械的駆動要素と、処置用工具に向けられた
一端と光を受けるために光源に向けられた他端と
を有する光伝達部材と、を備えた歯科医療用ハン
ドピースに関する。この光伝達部材は例えばガラ
ス、合成樹脂等からなる繊維を束ねたものによつ
て構成することができる。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a straight or curved dental handpiece, in particular a distal end to which a treatment tool is attached and a proximal end connected to a supply section having a supply hose. an elongated handpiece having a mechanical drive element disposed within the handpiece and extending substantially the entire length of the handpiece for moving the treatment tool, one end directed toward the treatment tool and receiving light; and a light transmitting member having an opposite end facing a light source. This light transmission member can be constructed by, for example, a bundle of fibers made of glass, synthetic resin, or the like.

このようなハンドピースの１つがドイツ実用新
案第6940204号によつて開示されている。この公
知のハンドピースの場合において、光伝達部材は
水および／または空気を供給するための媒体導管
と共に可撓性のホース内に配設され、このホース
は、ハンドピースの基端部に設けられた供給部か
らハンドピースの先端に設けられた処置用工具ま
でハンドピースの外側に沿つて延びている。ハン
ドピースは、ハンドピース本体と、このハンドピ
ース本体と供給部との間に設けられた駆動部を、
を備え、供給部は駆動部に対して回転不能に連結
されている。また、ハンドピース本体と駆動部と
の間の相対的な回動を可能にするため、上記ホー
スは或る超過長さを有している。しかしながら、
上記のように、ホースがハンドピースの外側をハ
ンドピースに沿つて延びている場合、ホースによ
つてハンドピースの握りや保持が阻害され、患者
への処置作業が非常に困難になる。 One such handpiece is disclosed by German Utility Model No. 6940204. In the case of this known handpiece, the light transmission member is arranged in a flexible hose with a medium conduit for supplying water and/or air, which hose is provided at the proximal end of the handpiece. The supply section extends along the outside of the handpiece to a treatment tool provided at the distal end of the handpiece. The handpiece includes a handpiece body and a drive unit provided between the handpiece body and the supply unit.
The supply section is non-rotatably connected to the drive section. The hose also has a certain excess length to allow relative rotation between the handpiece body and the drive. however,
As mentioned above, if the hose extends along the outside of the handpiece, the hose will interfere with gripping and holding the handpiece, making patient treatment operations extremely difficult.

アメリカンミツドウエスト社の案内パンフレツ
トHP−018G−0680−20Mから別な様式の歯科治
療用ハンドピースが開示されている。すなわち、
このハンドピースは、ハンドピースの全長に渡つ
て延びる機械的駆動要素を用いるのではなくて、
ハンドピースの先端部内に設けられ処置用工具に
接続されたタービンと、ハンドピース内にその全
長に渡つて配設され、ハンドピースの基端から上
記タービンへ駆動用の空気を導く空気導管と、を
備えている。このような構成のハンドピースの場
合には、光伝達部材はハンドピース内に埋設され
ている。 Another style of dental handpiece is disclosed in American Mid-West's informational brochure HP-018G-0680-20M. That is,
Rather than using a mechanical drive element extending the entire length of the handpiece, this handpiece
a turbine provided within the distal end of the handpiece and connected to the treatment tool; an air conduit disposed within the handpiece over its entire length and guiding driving air from the proximal end of the handpiece to the turbine; It is equipped with In the case of a handpiece having such a configuration, the light transmission member is embedded within the handpiece.

ハンドピース内に光伝達部材を埋設したのは、
ハンドピース内部に存在する空気導管が比較的細
く、光伝達部材を収容するための充分な空間が存
在していたためである。 The light transmission member was embedded inside the handpiece.
This is because the air conduit within the handpiece is relatively thin and there is sufficient space to accommodate the light transmission member.

しかしながら、本文の初めにあげた種類のハン
ドピースの場合には、駆動軸等の比較的太い機械
的駆動要素およびこれらの軸受が、光伝達部材を
ハンドピース内へ埋設する際の妨げとなる。つま
り、機械駆動式のハンドピースと空気駆動式のハ
ンドピースとでは、その挙動が全く異なるもので
ある。 However, in the case of handpieces of the type mentioned at the beginning of the text, relatively thick mechanical drive elements such as drive shafts and their bearings impede the embedding of the light transmission member into the handpiece. In other words, the behavior of a mechanically driven handpiece and an air-driven handpiece is completely different.

そこで、本発明の目的は、ハンドピースの略全
長に渡つて延びる機械的駆動要素を有するハンド
ピースにおいて、光伝達部材を配置することによ
つてもたらされるハンドピースの使用の阻害や困
難性を解消することのできるハンドピースを提供
することにある。 SUMMARY OF THE INVENTION Therefore, an object of the present invention is to eliminate the obstruction and difficulty in using a handpiece caused by arranging a light transmitting member in a handpiece having a mechanical drive element extending over substantially the entire length of the handpiece. The objective is to provide a handpiece that can

上記目的を達成するため、この発明の歯科医療
用ハンドピースによれば、ハンドピースの基端
は、供給部に対して、供給部と共通の軸、つま
り、供給軸、の回りで回動可能に連結され、ま
た、ハンドピースの先端に設けられた処理工具を
駆動するための機械的駆動要素は、ハンドピース
内を略上記供給部に沿つて延びている。また、ハ
ンドピース内において上記機械的駆動要素の側方
に光伝達部材が配設されている。この光伝達部材
は、ハンドピースの先端部に位置し上記処置工具
に向けられた一端とハンドピースの基端側に位置
した他端とを有している。そして、光伝達部材の
他端は、ほぼ上記共通軸上に位置した状態で上記
供給部に向かつて延出している。また、供給部内
において、上記共通軸上に光源が設けられ光伝達
部材の他端と対向して位置している。 In order to achieve the above object, according to the dental handpiece of the present invention, the proximal end of the handpiece is rotatable with respect to the supply section around a common axis with the supply section, that is, the supply shaft. A mechanical drive element for driving a processing tool coupled to the distal end of the handpiece extends within the handpiece generally along the feed section. Further, a light transmission member is disposed within the handpiece to the side of the mechanical drive element. The light transmission member has one end located at the distal end of the handpiece and directed toward the treatment tool, and the other end located at the proximal end of the handpiece. The other end of the light transmission member extends toward the supply section while being located substantially on the common axis. Further, within the supply section, a light source is provided on the common axis and is located opposite the other end of the light transmission member.

本発明にように構成されたハンドピースによれ
ば、ハンドピース内に特別な空間を設けることな
く、機械的駆動要素の側方に光伝達部材を設ける
ことができ、内部に機械的駆動要素、すなわち、
ハンドピースのほぼ共通軸に沿つて延びる駆動軸
や駆動部および場合により伝動装置を備えたハン
ドピースの握りや保持、取り扱いに阻害や困難を
もたらすことがない。また、光伝達部材の供給部
側の端は、上記共通軸上に位置するように設けら
れていることから、ハンドピースと供給部とを相
対的に回動可能とした場合でも、光源からの光を
光伝達部材に容易に導くことができる。そして、
ハンドピースと供給部とを相対的に回動可能とす
ることにより、ハンドピースの取り扱い性が一層
向上する。 According to the handpiece configured as in the present invention, the light transmitting member can be provided on the side of the mechanical drive element without providing a special space inside the handpiece, and the mechanical drive element inside, That is,
There is no obstruction or difficulty in gripping, holding and handling the handpiece with drive shafts, drives and optionally transmissions extending substantially along a common axis of the handpieces. In addition, since the end of the light transmission member on the side of the supply section is located on the above-mentioned common axis, even if the handpiece and the supply section are made relatively rotatable, the end of the light transmission member on the side of the light source is Light can be easily guided to the light transmission member. and,
By making the handpiece and the supply section relatively rotatable, the handpiece can be handled more easily.

以下図面を参照しながらこの発明の実施例につ
いて詳細に説明する。 Embodiments of the present invention will be described in detail below with reference to the drawings.

第１図ないし第５図は、この発明の第１の実施
例に係る歯科医療用ハンドピースを示している。 1 to 5 show a dental handpiece according to a first embodiment of the present invention.

歯科医療用ハンドピースは、中間部で折曲げら
れた中空のハンドピース本体１と、後述する処置
工具を駆動するための機械的駆動要素２と、を備
えて構成されている。ハンドピース本体１の先端
には、処置用工具３としての穿孔バーが取り付け
られているとともに、ハンドピース本体１の基端
には、機械的駆動要素２の一部を構成する駆動部
１１が取り外し可能に連結されている。 The dental handpiece includes a hollow handpiece body 1 bent at the middle, and a mechanical drive element 2 for driving a treatment tool to be described later. A perforation bar serving as a treatment tool 3 is attached to the tip of the handpiece body 1, and a drive unit 11 that constitutes a part of the mechanical drive element 2 is removed from the base end of the handpiece body 1. possible to be connected.

機械的駆動要素２はハンドピースのほぼ全長に
渡つて延びている。詳細には、機械的駆動要素２
は一対の駆動軸２ｂを有し、一方の駆動軸はハン
ドピース本体１の先端、つまり、処置値用工具３
からハンドピース本体の屈曲部まで延び、他方の
駆動軸は屈曲部からハンドピース本体の基端近傍
までのびている。そして、これらの駆動軸２ｂは
屈曲部において互いに動力伝達可能な状態に連結
されている。駆動軸２ｂは、それぞれ軸受により
回転自在に支持されている。また、機械的駆動要
素２は、ハンドピース本体１の基端に連結された
駆動部１１を備えている。駆動部１１は、ハンド
ピース本体１の基端に回動不能にかつ取り外し可
能に連結されたほぼ円筒形状のケース１０ａを有
し、このケース内に駆動源としての駆動モータ２
ａが収納されている。ケース１０ａがハンドピー
ス本体１に連結された状態において、駆動モータ
２ａの回転軸１１ａは、基端側の駆動軸２ｂと同
軸的に位置し、かつ、この駆動軸に連結されるよ
うに構成されている。従つて、駆動モータ２ａに
通電さることにより、駆動軸１１ａおよび一対の
駆動軸２ｂを介して処置用工具３としての穿孔バ
ーを回転駆動することができる。なお、駆動モー
タ２ａとしては、電動モータ、流体圧モータ、フ
アイン−空気モータ等を使用することができる。 The mechanical drive element 2 extends over substantially the entire length of the handpiece. In detail, mechanical drive element 2
has a pair of drive shafts 2b, one of which is connected to the tip of the handpiece body 1, that is, the treatment value tool 3.
The drive shaft extends from the bent portion to the bent portion of the handpiece body, and the other drive shaft extends from the bent portion to near the base end of the handpiece body. These drive shafts 2b are connected to each other at the bent portions so as to be able to transmit power to each other. The drive shafts 2b are each rotatably supported by bearings. The mechanical drive element 2 also includes a drive section 11 connected to the proximal end of the handpiece body 1 . The drive unit 11 has a substantially cylindrical case 10a that is unrotatably and removably connected to the base end of the handpiece body 1, and has a drive motor 2 as a drive source inside the case.
a is stored. In a state where the case 10a is connected to the handpiece body 1, the rotation shaft 11a of the drive motor 2a is positioned coaxially with the drive shaft 2b on the proximal end side, and is configured to be connected to this drive shaft. ing. Therefore, by energizing the drive motor 2a, the drilling bar serving as the treatment tool 3 can be rotationally driven via the drive shaft 11a and the pair of drive shafts 2b. Note that as the drive motor 2a, an electric motor, a fluid pressure motor, a fine-air motor, etc. can be used.

第１図ないし第３図に示すように、ハンドピー
ス本体１と駆動部１１との間には、これらを取り
外し可能に連結するための解除可能なロツク装置
３５と、これらの相対的な回動を規制するための
第１の係合機構１２と、が設けられている。第１
の係合機構１２は、ハンドピース本体１の基端側
の端面から、この端面と向い合つたケース１０ａ
の端面に向かつて突出した１つの突出部１４と、
ケース１０ａの端面に形成され突出部１４が係合
する係合部１５と、を有している。突出部１４
は、ボール等のストツパ部材で構成され、このス
トツパ部材はハンドピース本体１内に設けられた
ばね１８ａによりケース１０ａに向かつて付勢さ
れている。また、係合部１５は凹所からなるスト
ツパ孔で構成されている。なお、突出部１４およ
び係合部１５は複数づつ設けられていてもよく、
また、ハンドピース本体１側に係合部１５を設
け、駆動部１１側に突出部１４を設けるようにし
てもよい。 As shown in FIGS. 1 to 3, a releasable locking device 35 is provided between the handpiece body 1 and the drive portion 11 to removably connect them, and a locking device 35 is provided between the handpiece body 1 and the drive portion 11 to allow their relative rotation. A first engagement mechanism 12 is provided for regulating the. 1st
The engagement mechanism 12 extends from the proximal end surface of the handpiece body 1 to the case 10a facing this end surface.
one protrusion 14 protruding toward the end face of the
It has an engaging part 15 formed on the end surface of the case 10a and with which the protruding part 14 engages. Projection part 14
is composed of a stopper member such as a ball, and this stopper member is urged toward the case 10a by a spring 18a provided within the handpiece body 1. Further, the engaging portion 15 is constituted by a stopper hole consisting of a recess. Note that a plurality of protruding portions 14 and a plurality of engaging portions 15 may be provided,
Alternatively, the engaging portion 15 may be provided on the handpiece body 1 side, and the protruding portion 14 may be provided on the drive portion 11 side.

歯科医療用ハンドピースの処置工具３と反対側
の端、つまり、駆動部１１のハンドピース本体１
と反対側の端部は、接続供給ホース８を有する供
給部９に回動可能に連結されている。つまり、こ
の連結は、ハンドピース本体１および駆動部１１
が、供給部９に対して、供給部のほぼ中心を通る
共通軸Ａの回りで可動可能となるようになされて
いる。詳細には、駆動部１１と供給部９との間に
は、これらを互いに回動可能に連結するための第
２の係合機構１３が設けられている。第２の係合
機構１３は、駆動部１１の供給部９側の端に形成
された環状溝１６と、供給部９の端に設けられ環
状溝１６に嵌合した環状のフランジ１７と、を有
している。これらの環状溝１６およびフランジ１
７は共通軸Ａと同軸的に形成されているととも
に、フランジ１７は共通軸と平行に延出してい
る。また、フランジ１７には、共通軸Ａと平行に
延びる複数の切込みが円周方向に沿つて互いに離
間して形成されている。なお、供給部９内におい
て駆動部１１側の端部内には、光源７としての白
熱灯１０が配設され、共通軸Ａ上に位置してい
る。 The end of the dental medical handpiece opposite to the treatment tool 3, that is, the handpiece body 1 of the drive unit 11
The opposite end is pivotally connected to a supply part 9 with a connecting supply hose 8 . In other words, this connection is made between the handpiece body 1 and the drive section 11.
is movable relative to the supply section 9 around a common axis A passing approximately through the center of the supply section. Specifically, a second engagement mechanism 13 is provided between the drive section 11 and the supply section 9 to rotatably connect them to each other. The second engagement mechanism 13 includes an annular groove 16 formed at the end of the drive section 11 on the supply section 9 side, and an annular flange 17 provided at the end of the supply section 9 and fitted into the annular groove 16. have. These annular grooves 16 and flanges 1
7 is formed coaxially with the common axis A, and the flange 17 extends parallel to the common axis. Furthermore, a plurality of cuts extending parallel to the common axis A are formed in the flange 17 and spaced apart from each other along the circumferential direction. Incidentally, an incandescent lamp 10 as a light source 7 is disposed within the end of the supply section 9 on the drive section 11 side, and is located on the common axis A.

ハンドピース本体１および駆動部１１内には、
これらの全長に渡つて延びる光伝達部材４が設け
られている。光伝達部材４の先端５は、ハンドピ
ース本体１の先端部において外方に露出し、処置
用工具３の範囲へ向けられている。また、光伝達
部材４の後端６は、駆動部１１の供給部９側の端
の位置において共通軸Ａと同軸的に位置している
とともに、供給部に向かつて延出し白熱灯１０と
対向している。光伝達部材４は、ガラス、合成樹
脂等からなる光学繊維束で構成されている。 Inside the handpiece body 1 and the drive section 11,
A light transmission member 4 is provided that extends over the entire length of these. The distal end 5 of the light transmission member 4 is exposed outwardly at the distal end of the handpiece body 1 and is directed towards the range of the treatment tool 3 . The rear end 6 of the light transmission member 4 is located coaxially with the common axis A at the end of the drive unit 11 on the supply unit 9 side, and extends toward the supply unit and faces the incandescent lamp 10. are doing. The light transmission member 4 is composed of an optical fiber bundle made of glass, synthetic resin, or the like.

詳細には、光伝達部材４は、その後端部を除
き、機械的駆動要素２の側方を通つて延びてい
る。そして、光伝達部材４は、ハンドピース本体
１と駆動部１１との連結部で２つに分割されてい
る。つまり、光伝達部材４は、ハンドピース本体
１内に埋設された光伝達部分２０と、駆動部１１
内に埋設された光伝達部分２１と、を有してい
る。光伝達部分２０は、ハンドピース本体１と駆
動部１１との連結部に位置した端部１８から先端
５まで駆動軸２ｂの側方を延びている。また、光
伝達部分２１は、ハンドピース本体１と駆動部１
１との連結部に位置した端部１９から駆動モータ
２ａの側方を通つて延び、更に、駆動モータ２ａ
を越えた位置から駆動部１１の中心に向かつて後
端６まで延びている。後端６の部分は、前述した
ように、共通軸Ａと同軸的に位置しているととも
に、駆動部１１の端から白熱灯１０に向かつて突
出している。そして、これらの光伝達部分２０，
２１の端部１８，１９は互いに向き合つて位置し
ている。 In particular, the light transmission member 4 extends laterally through the mechanical drive element 2 except at its rear end. The light transmission member 4 is divided into two parts at the connecting portion between the handpiece body 1 and the drive section 11. In other words, the light transmission member 4 includes a light transmission portion 20 embedded in the handpiece body 1 and a drive portion 11.
and a light transmitting portion 21 embedded therein. The light transmission portion 20 extends from the end portion 18 located at the connection portion between the handpiece body 1 and the drive portion 11 to the tip 5 on the side of the drive shaft 2b. Further, the light transmission portion 21 includes the handpiece body 1 and the drive portion 1.
1 extends from the end 19 located at the connection with the drive motor 2a, and further extends from the side of the drive motor 2a.
It extends from a position beyond , toward the center of the drive unit 11 to the rear end 6 . As described above, the rear end 6 is located coaxially with the common axis A and protrudes from the end of the drive section 11 toward the incandescent lamp 10. And these light transmission parts 20,
The ends 18, 19 of 21 are located opposite each other.

白熱灯１０と光伝達部材４の後端６との間、お
よび光伝達部分２０，２１の端部１８，１９間に
おけて光強度の減衰を生じることなく光を伝達す
るために、後端６および端部１９はそれぞれ送受
光部２２，２３として先端へ向かつて円錐状に広
がつて形成されている。同様の理由により、光伝
達部材４、つまり、光伝達部２０，２１は、複数
の光学繊維束で構成されている。 In order to transmit light without attenuation of light intensity between the incandescent lamp 10 and the rear end 6 of the light transmission member 4 and between the ends 18 and 19 of the light transmission parts 20 and 21, the rear end 6 and the end portion 19 are formed as light transmitting/receiving portions 22 and 23, respectively, and widen into a conical shape toward the tip. For the same reason, the light transmission member 4, that is, the light transmission sections 20 and 21, is composed of a plurality of optical fiber bundles.

なお、円錐状に広がつた送受光部２２，２３
は、その成形に際して例えば合成樹脂よりなる接
着剤等を用いて所望の形状を維持するようにして
もよい。 Note that the light transmitting/receiving parts 22 and 23 spread out in a conical shape.
The desired shape may be maintained during molding using an adhesive made of synthetic resin, for example.

第４図および第５図から明らかなように、ハン
ドピース本体１内に設けられた光伝達部分２０
は、駆動軸２ｂの傍を並んで走つている２本の光
繊維束４ａ，４ｂで構成されている。また、これ
らの光繊維束４ａ，４ｂ間には、媒体導管２５，
２６が設けられ、これらの媒体導管は、供給部９
から供給された冷却空気、冷却水等の媒体をハン
ドピース本体１の先端に位置した開口端２４から
処置用工具３の範囲に向けて供給する。これらの
媒体導管２５，２６には、駆動部１１内に設けら
れている供給媒体導管２７が接続されている。第
３図から明らかなように、供給媒体導管７には、
供給部９内に設けられて接続供給ホース８の中に
続いている供給部媒体導管２８，２９が接続され
ている。この場合、供給部９と駆動部１１との間
の媒体導管移行部３０は、供給部９および駆動部
１１が共通軸Ａの回りで相対回転する間、および
全ての回転位置において、連通状態と成るように
構成されている。このような構成は、公知の環状
シール、環状溝を組み合わせて使用することによ
り容易に達成することができる。 As is clear from FIGS. 4 and 5, a light transmission portion 20 provided within the handpiece body 1
consists of two optical fiber bundles 4a and 4b running side by side beside the drive shaft 2b. Moreover, between these optical fiber bundles 4a and 4b, a medium conduit 25,
26 are provided and these media conduits connect to the supply 9
A medium such as cooling air or cooling water is supplied from the open end 24 located at the tip of the handpiece body 1 toward the range of the treatment tool 3. A supply medium conduit 27 provided within the drive section 11 is connected to these medium conduits 25 and 26 . As is clear from FIG. 3, the supply medium conduit 7 includes:
A supply medium conduit 28, 29 which is provided in the supply part 9 and which leads into the connecting supply hose 8 is connected. In this case, the medium conduit transition 30 between the supply part 9 and the drive part 11 is in communication during the relative rotation of the supply part 9 and the drive part 11 about the common axis A and in all rotational positions. It is configured to be. Such a configuration can be easily achieved by using a combination of known annular seals and annular grooves.

以上のように構成された歯科医療用ハンドピー
スによれば、ハンドピース内に特別な空間を設け
ることなく、機械的駆動要素の側方に光伝達部材
を設けることができ、治療の際、患部を良好に照
明することができる。そして、光伝達部材がハン
ドピース本体の外側に設けられているものに比較
して、ハンドピースの握り、保持等の取り扱いを
大幅に向上することができる。更に、光伝達部材
を内部に備えているにも拘らず、ハンドピースの
外径の増大を防止することができる。また、光伝
達部材の供給部側の端は、ハンドピースの回動中
心である共通軸上に位置するように設けられてい
ることから、ハンドピースと供給部とを相対的に
回動可能とした場合でも、光源からの光を光伝達
部材に容易に導くことができる。そして、ハンド
ピースと供給部とを相対的に回動可能にすること
により、ハンドピースの取り扱い性が一層向上す
る。 According to the dental medical handpiece configured as described above, the light transmission member can be provided on the side of the mechanical drive element without providing a special space inside the handpiece, and the light transmission member can be provided on the side of the mechanical drive element. can be well illuminated. Moreover, compared to a case where the light transmission member is provided outside the handpiece body, handling such as gripping and holding the handpiece can be greatly improved. Furthermore, the outer diameter of the hand piece can be prevented from increasing even though the light transmission member is provided inside. Furthermore, since the end of the light transmission member on the side of the supply section is located on the common axis that is the center of rotation of the handpiece, the handpiece and the supply section can be rotated relative to each other. Even in this case, the light from the light source can be easily guided to the light transmission member. By making the handpiece and the supply section relatively rotatable, the handling of the handpiece is further improved.

次に、第６図および第７図を参照しながら、は
この発明の第２の実施例に係る歯科医療用ハンド
ピースについて説明する。なお、第２の実施例に
おいて、第１の実施例と同一の部分には同一の参
照符号を付してその詳細な説明を省略し、第１の
実施例と異なる部分についてのみ説明する。 Next, with reference to FIGS. 6 and 7, a dental handpiece according to a second embodiment of the present invention will be described. In addition, in the second embodiment, the same reference numerals are given to the same parts as in the first embodiment, detailed explanation thereof will be omitted, and only the different parts from the first embodiment will be explained.

第２の実施例によれば、駆動部１１はハンドピ
ース本体１の内部に完全に収容されているととも
に、ハンドピース本体１の基端部に、供給部９の
端部がハンドピース本体に対して相対的に回動可
能に連結されている。なお、供給部９は駆動部１
１と一体にハンドピース本体１から分離可能とな
つている。駆動部１１は係合機構１２により、ハ
ンドピース本体１に対する回動が規制されてい
る。また、駆動モータ２ａの駆動部１１ａと駆動
軸２ｂとの間は伝導装置２ｃが設けられている。 According to the second embodiment, the drive section 11 is completely housed inside the handpiece body 1, and the end of the supply section 9 is located at the proximal end of the handpiece body 1 relative to the handpiece body. are connected to be relatively rotatable. Note that the supply section 9 is connected to the drive section 1.
1 and can be separated from the handpiece main body 1. Rotation of the drive unit 11 relative to the handpiece body 1 is restricted by an engagement mechanism 12 . Further, a transmission device 2c is provided between the drive portion 11a of the drive motor 2a and the drive shaft 2b.

ハンドピース本体１内に設けられた媒体導管２
５，２６には、供給部９内に設けられて接続供給
ホース８中に続いている供給部媒体導管２８，２
９がそれぞれ接続されている。この場合、供給部
９とハンドピース本体１との間の媒体導管移行部
３０ａは、供給部９とハンドピース本体１とが供
結軸Ａの回りで相対的に回転する間、およびその
全ての回転位置において、連通状態と成るように
構成されている。媒体導管移行部３０ａも第１の
実施例と同様に公知の環状シールおよび環状溝を
組み合わせて用いることにより構成されている。 A medium conduit 2 provided within the handpiece body 1
5, 26 have supply medium conduits 28, 2 provided in the supply 9 and leading into the connecting supply hose 8.
9 are connected to each other. In this case, the medium conduit transition 30a between the supply part 9 and the handpiece body 1 is provided during the relative rotation of the supply part 9 and the handpiece body 1 about the coupling axis A, and during all In the rotational position, they are configured to be in communication. The medium conduit transition section 30a is also constructed by using a combination of a known annular seal and an annular groove, similarly to the first embodiment.

供給部９は、供給ホース８を通つて導かれた電
流供給部材３１を含んでおり、これらの電流供給
部材は供給部の外面に露出した接触子３２に接続
されている。また、駆動部１１には、駆動モータ
２ａに電気的に接続された接触子３３が設けら
れ、接触し３２と常時摺接可能となつている。従
つて、電流供給部材３１は、接触子３２，３３を
通して駆動モータ２ａに電気的に接続されてい
る。接触子３２および／または３３は滑り接触子
またはリング接触子として構成されている。ま
た、供給部９内には接続供給ホース８を通して光
源７へ通ずる電流供給部材３４が設けられてい
る。 The supply part 9 includes current supply members 31 led through the supply hose 8 and connected to contacts 32 exposed on the outside of the supply part. Further, the drive unit 11 is provided with a contactor 33 electrically connected to the drive motor 2a, so that the contactor 33 is in contact with and can be in sliding contact with the drive motor 2a at all times. Therefore, the current supply member 31 is electrically connected to the drive motor 2a through the contacts 32 and 33. Contacts 32 and/or 33 are designed as sliding or ring contacts. Further, a current supply member 34 is provided in the supply section 9 and communicates with the light source 7 through the connection supply hose 8 .

以上のように構成された第２の実施例において
も、上記第１の実施例と同様の作用効果を得るこ
とができる。 Even in the second embodiment configured as described above, the same effects as in the first embodiment can be obtained.

なお、上記電流供給部材３１，３４および接触
子３２，３３は、上記第１の実施例においても適
用されていることはいうまでもない。また、第１
及び第２の実施例において、白熱灯１０はレンズ
状電球で構成されていてもよい。 It goes without saying that the current supply members 31 and 34 and the contacts 32 and 33 are also applied to the first embodiment. Also, the first
In the second embodiment, the incandescent lamp 10 may be a lenticular light bulb.

[Brief explanation of the drawing]

第１図は本発明の一実施例に係る歯科医療用ハ
ンドピースの側面断面図、第２図はその駆動部の
工具側端より見た正面図、第３図は第２図の−
線に沿う断面図、第４図は工具側端部の斜視
図、第５図は第１図の破線で示した円の部分の拡
大図、第６図は本発明の他の実施例に係るハンド
ピースの側面図、第７図はこのハンドピースの駆
動部および供給部の断面図である。１……ハンドピース本体、２……機械的駆動要
素、２ａ……駆動用モータ、３……処置用工具、
４……光伝達部材、７……光源、８……接続供給
ホース、９……供給部、１０……白熱灯、１１…
…駆動部、１２，１３……係合機構、１４……突
出部、１５……凹所、１６……環状溝、１７……
フランジ、１８ａ……ばね、２０，２１……光伝
達部分、２２，２３……送受光部、２５，２６…
…媒体導管、２７……供給媒体導管、２８，２９
……供給部媒体導管、３０，３０ａ……媒体導管
移行部、３１，３４……電流供給部材、３２，３
３……接触子。 FIG. 1 is a side cross-sectional view of a dental handpiece according to an embodiment of the present invention, FIG. 2 is a front view of the handpiece as seen from the tool side end of the drive section, and FIG. 3 is the same as shown in FIG.
4 is a perspective view of the tool side end, FIG. 5 is an enlarged view of the circle indicated by the broken line in FIG. 1, and FIG. 6 is a diagram showing another embodiment of the present invention. The side view of the handpiece, FIG. 7, is a cross-sectional view of the drive and supply parts of this handpiece. 1...Handpiece body, 2...Mechanical drive element, 2a...Drive motor, 3...Treatment tool,
4... Light transmission member, 7... Light source, 8... Connection supply hose, 9... Supply section, 10... Incandescent lamp, 11...
... Drive portion, 12, 13... Engagement mechanism, 14... Protrusion, 15... Recess, 16... Annular groove, 17...
Flange, 18a... Spring, 20, 21... Light transmission part, 22, 23... Light transmission/reception part, 25, 26...
...Media conduit, 27...Feed medium conduit, 28, 29
... Supply section medium conduit, 30, 30a ... Medium conduit transition section, 31, 34 ... Current supply member, 32, 3
3...Contact child.

Claims

[Scope of Claims] 1. One end to which the treatment tool 3 is attached, the other end connected to the supply section 9 having the connecting supply hose 8, and the treatment tool located at the one end and attached to the treatment tool 3. a light transmitting member 4 having a front end 5 directed toward the other end and a rear end 6 located at the other end and directed toward a light source 7 provided in the supply section; In a dental medical handpiece, the other end is arranged around a common axis A, and is provided with a mechanical drive element 2 therein for driving the treatment tool. the light transmitting member 4 is provided inside the dental handpiece and extends laterally along the mechanical drive element 2; The rear end 6 of the light transmission member is located within the other end portion substantially coaxially with the common axis A, and extends from the other end toward the supply portion, and the light source 7 is located at the supply portion 9. A dental medical handpiece characterized in that the handpiece is provided substantially on the common axis A within the interior thereof and faces the rear end 6 of the light transmission member. 2. The dental medical handpiece according to claim 1, wherein the light source 7 is an incandescent lamp 10. 3 A handpiece body 1 having the one end portion to which the treatment tool 3 is attached, and a drive unit 11 provided between the handpiece body and the supply unit 9, the drive unit comprising: The light transmission member 4 is unrotatably connected to the end opposite to the one end of the handpiece body, and is rotatably connected to the supply section around the common axis A. The dental handpiece according to claim 1 or 2, wherein the handpiece extends through the piece body and the drive section. 4 A first engagement mechanism 12 is disposed between the drive unit 11 and the handpiece body 1 to prevent relative rotation of the drive unit and the handpiece body, and the first engagement mechanism 12 is disposed between the drive unit 11 and the supply unit 9. 4. The dental handpiece according to claim 3, further comprising a second engagement mechanism 13 for rotatably connecting the drive section and the supply section to each other. 5 The first engagement mechanism 12 includes at least one axial protrusion 14 provided at one end of the drive section 11 and the handpiece body 1, and the other end of the drive section and the handpiece body. 5. The dental medical handpiece according to claim 4, further comprising at least one engaging portion 15 provided at the axially extending portion and engaged with the at least one axial protrusion. 6 The second engagement mechanism 13 is connected to the drive section 11.
and at least one annular groove 16 provided at one end of the feed section 9 and at least one radial flange fitted into the annular groove provided at the other end of the drive and feed section. 17. The dental medical handpiece according to claim 4 or 5, characterized in that the handpiece comprises: 17. 7. The dental medical handpiece according to claim 5, wherein the axial protrusion 14 is biased toward the engaging portion 15. 8 The axial protrusion 14 is a stopper which is biased toward the other end of the drive part and the handpiece body by a spring 18a provided in one end of the drive part and the handpiece body 11,1. The dental medical hand according to claim 7, wherein the engaging portion 15 is a stopper hole provided at the other end. piece. 9. The dental medical handpiece according to any one of claims 3 to 7, characterized in that the connection between the drive section 11 and the handpiece body 1 is releasable. . 10. Dental care according to any one of claims 3 to 8, characterized in that the rotatable connection between the drive unit 11 and the supply unit 9 is irreleasable. hand piece. 11. The dental clinic according to any one of claims 3 to 10, characterized in that the light transmission member 4 is divided at a connecting portion between the handpiece body 1 and the drive unit 11. Medical handpiece. 12 The light transmission member 4 includes a light transmission portion 20 present in the handpiece body 1 and the drive portion 1.
Dental care according to claim 11, characterized in that the dental treatment is divided into a light transmitting part 21 present in the first part, and the mutually adjacent ends 18, 19 of the light transmitting part face each other. hand piece. 13. Claim 11 or 12, characterized in that the end 19 of the light transmission portion 21 in the drive section 11 is located at the end surface of the drive section 11 on the handpiece body 1 side. The dental medical handpiece described. 14 The mechanical drive element 2 has a drive motor 2a arranged in the drive part 11, and the light transmission part 21 in the drive part 11 has a drive motor 2a arranged in the drive part 11.
The dental handpiece according to any one of claims 11 to 13, characterized in that the handpiece extends along the drive motor on the side of a. 15. The dental medical handpiece according to claim 11 or 12, characterized in that the light transmission portion 21 within the drive section 11 extends in the radial direction of the drive section. 16 The mechanical drive element 2 has a drive motor 2a provided in the drive part 11, and the light transmission part 21 in the drive part 11 has a drive motor 2a provided in the drive part 11.
16. The handpiece for dental care according to claim 15, wherein the handpiece is disposed on the side opposite to the handpiece main body 1 of a. 17 Both ends of the light transmission section 21 are connected to the light transmission/reception section 2
14. The dental handpiece according to any one of claims 12 to 14, characterized in that the handpieces 2 and 23 are expanded into a conical shape. 18. The dental medical handpiece according to claim 17, wherein the light transmission portions 20, 21 are composed of a plurality of optical fiber bundles. 19 The light transmission member 20 has two optical fibers 4a and 4b extending along the mechanical drive element 2 within the handpiece body 1, and the treatment tool is inserted between the optical fibers. Claim 18, characterized in that one or more media conduits 25, 26 are arranged, which have one end 24 open towards 3 and communicate with the supply 9. dental handpiece. 20. Claim 19, characterized in that a supply medium conduit 27 provided within the drive unit 11 is connected to the medium conduits 25, 26 disposed within the handpiece body 1. dental handpiece. 21 a supply medium conduit 28,2 provided in the supply 9 and leading into the connecting supply hose 8;
9 is connected to the supply medium conduit 27 provided in the drive part 11, and between the supply part 9 and the drive part 11, during the rotation of the supply part and the drive part relative to each other, and all 20. The dental medical handpiece according to claim 20, further comprising a medium conduit transition section 30 that maintains communication between the supply medium conduit and the supply medium conduit at the rotational position of the handpiece. . 22 The handpiece body 1 has the drive section 11
is completely accommodated therein, and surrounds the end of the supply section 9 connected to the drive section, and the media conduits 25 and 26 provided in the handpiece body 1 are provided with the connection supply section 9. A supply medium conduit 28, 29 leading into the hose 8 is connected;
Between the supply section 9 and the handpiece body 1, the supply section medium conduit and the supply medium conduit are maintained in communication during the rotation of the supply section and the drive section relative to each other and in all rotational positions. 20. The dental medical handpiece according to claim 19, further comprising a medium conduit transition section 30a. 23 The mechanical drive element 2 has an electric drive motor 2a arranged in the drive part, the supply part 9 has a current supply member 31 extending through the connecting supply hose 8, The current supply member is electrically connected to the drive motor via a contact 32 provided in the supply section and another contact provided in the drive section and in sliding contact with the contact, and the contact and For dental medical use according to any one of claims 3 to 22, wherein the other contacts 32 and/or 33 are constructed as sliding contacts or ring contacts. hand piece. 24. According to any one of claims 1 to 23, characterized in that a current supply member 34 extending from the connection supply hose 8 to the light source 7 is arranged in the supply section 9. dental handpiece.