JPH0416657Y2

JPH0416657Y2 -

Info

Publication number: JPH0416657Y2
Application number: JP10143687U
Authority: JP
Priority date: 1987-06-30
Filing date: 1987-06-30
Publication date: 1992-04-14
Also published as: JPS646917U

Description

【考案の詳細な説明】（産業上の利用分野）この考案はエアーモータを駆動源とするハンド
ピースに関する。[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a handpiece using an air motor as a driving source.

（従来技術）エアーモータを駆動源とする従来のハンドピー
スは、エアー供給用ホースから供給された圧搾空
気でエアーモータを回転させ、使い終えたエアー
をハンドピース本体周面に開設した排気口より直
接的に排気していた。(Prior art) Conventional handpieces that use an air motor as a drive source rotate the air motor with compressed air supplied from an air supply hose, and exhaust the used air from an exhaust port provided on the periphery of the handpiece body. It was directly exhausted.

従つて、上記排気口からの排気ノイズは大き
く、しかも作業している手元で直接的に発せられ
るので非常に不快である。 Therefore, the exhaust noise from the exhaust port is large and is emitted directly from the worker's hands, making it extremely unpleasant.

（技術的課題）本考案の技術的課題は、ハンドピースが発する
排気ノイズを低減せしめることである。(Technical Problem) A technical problem of the present invention is to reduce the exhaust noise generated by the handpiece.

（技術的課題を解決する為の手段）本考案が上記した技術的課題を解決する為に講
ずる手段は、エアーモータを駆動源とするハンド
ピースにおいて、上記ハンドピース本体後端にエ
アーモータの給気部及び排気部を設け、このハン
ドピース本体後端に二重構造の給排気ホースを接
続して、給気部と同給排気ホース内管内の給気路
とを連絡し、且つ給排気ホース接続部外周に消音
管を遊嵌しその一端口をハンドピース本体後端に
嵌着して、排気部を消音管一端口と給排気ホース
内外管の間の排気路とに分岐させて連絡し、上記
消音管は中間部を蛇腹状に成形すると共に同管他
端側に第１排気口を開設し、且又、給排気ホース
基端にて排気路を開放して第２排気口を構成し、
該排気口に多孔性材質の消音フイルターを装着し
たものである。音フイルターを装着したものであ
る。(Means for solving the technical problems) The means taken by the present invention to solve the above-mentioned technical problems is that in a hand piece that uses an air motor as a drive source, an air motor is connected to the rear end of the hand piece body. An air supply section and an exhaust section are provided, and a double-structured supply/exhaust hose is connected to the rear end of the handpiece body to connect the air supply section and the air supply path in the inner pipe of the supply/exhaust hose. A silencer tube is loosely fitted around the outer periphery of the connection part, and one end of the tube is fitted to the rear end of the handpiece body, and the exhaust section is branched into one end of the silencer tube and an exhaust path between the inner and outer tubes of the supply/exhaust hose. The middle part of the muffling pipe is formed into a bellows shape, and a first exhaust port is provided at the other end of the pipe, and an exhaust path is opened at the base end of the supply/exhaust hose to form a second exhaust port. death,
A noise filter made of porous material is attached to the exhaust port. It is equipped with a sound filter.

（作用）以上の手段によれば、給排気ホース内管内の給
気路から供給される圧搾空気は、ハンドピース本
体後端の給気部から同本体内に流入してエアーモ
ータを回転せしめる。(Function) According to the above means, the compressed air supplied from the air supply path in the inner tube of the supply/exhaust hose flows into the handpiece body from the air supply portion at the rear end of the handpiece body and rotates the air motor.

エアーモータを回転させた空気は、ハンドピー
ス本体後端の排気部に至り、給排気ホース内外管
の間の排気路と消音管の一端口内とに分流する。 The air that rotates the air motor reaches the exhaust section at the rear end of the handpiece body, and is divided into an exhaust path between the inner and outer tubes of the supply/exhaust hose and into one end of the muffling tube.

消音管の一端口内に流れ込んだ圧搾空気は給排
気ホース外管と消音管との間に形成される流路中
を流れ、同消音管の蛇腹状でもつて膨張・収縮を
繰返して消音された後、第１排気口より排気され
る。 The compressed air that flowed into the mouth of one end of the muffling tube flowed through the flow path formed between the outer tube of the supply/exhaust hose and the muffling tube, and the bellows-like shape of the muffling tube repeatedly expanded and contracted, thereby muffling the sound. After that, the air is exhausted from the first exhaust port.

一方、給排気ホースの排気路内に流れ込んだ圧
搾空気は同ホース基端の第２排気口に装着された
消音フイルターの多孔構造中を通過しながら消音
されて排気される。 On the other hand, the compressed air that has flowed into the exhaust path of the supply/exhaust hose is muffled and exhausted while passing through the porous structure of the noise filter attached to the second exhaust port at the base end of the hose.

（効果）本考案は以上の様に、エアーモータからの排気
流を排気部にて分流させ、一方の排気流を消音管
を通過させて第１排気口より排気し、また、もう
一方の排気流を第２排気口の消音フイルターを通
過させて排気しているので、第１及び第２排気口
から発する排気ノイズを十分に消音することがで
きる。(Effects) As described above, the present invention divides the exhaust flow from the air motor at the exhaust part, passes one exhaust flow through the muffler pipe and exhausts it from the first exhaust port, and Since the flow is exhausted by passing through the noise filter of the second exhaust port, exhaust noise emitted from the first and second exhaust ports can be sufficiently muffled.

そして、第２排気口の排気ノイズに限つては作
業者の手元より距離を置いた給排気ホース基端の
排気口より発せられるので、作業者が実際に感じ
る排気ノイズはさらに低減することができる。 As for the exhaust noise from the second exhaust port, it is emitted from the exhaust port at the base end of the supply and exhaust hose, which is located at a distance from the worker's hand, so the exhaust noise that the worker actually feels can be further reduced. .

さらに、エアーモータからの排気流を排気部に
て分流すると共に、分流した一方の排気流を排気
部から近い第１排気口より排気しているので、排
気抵抗が少なく、排気効率の低下を招くことがな
い。 Furthermore, the exhaust flow from the air motor is divided at the exhaust part, and one of the divided exhaust flows is exhausted from the first exhaust port close to the exhaust part, so there is little exhaust resistance, which leads to a decrease in exhaust efficiency. Never.

（実施例）以下、本考案の一実施例を図面に基づいて説明
する。(Example) Hereinafter, an example of the present invention will be described based on the drawings.

第１図及び第２図にて示すハンドピースＡはエ
アーモータa₁を内設したハンドピース本体A′の
後端に、上記エアーモータa₁に連通する給気部１
ａと排気部１ｂとを設け、このハンドピース本体
A′後端に給排気ホース２を接続してある。 The handpiece A shown in FIGS. 1 and 2 has an air supply section ₁ connected to the air motor A1 at the rear end of the handpiece body A' in which an air motor _A1 is installed.
a and an exhaust part 1b, and this handpiece body
The supply and exhaust hose 2 is connected to the rear end of A'.

給排気ホース２は第２図にて示す如く、内管２
ａと外管２ｂとから成る二重構造と成して、内管
２ａ内に給気路２a′を、また内管２ａと外管２ｂ
との間に排気路２b′を構成し、そして、両管２
ａ，２ｂは第３図にて示す如く支持片２ｃによつ
て一体化して内管２ａを外管２ｂの中芯部にて保
持せしめている。 The supply/exhaust hose 2 is connected to the inner pipe 2 as shown in FIG.
It has a double structure consisting of a and an outer tube 2b, with an air supply path 2a' inside the inner tube 2a, and an air supply path 2a' between the inner tube 2a and the outer tube 2b.
An exhaust passage 2b' is formed between the pipes 2b' and 2b'.
As shown in FIG. 3, a and 2b are integrated by a support piece 2c to hold the inner tube 2a at the center of the outer tube 2b.

上記給排気ホース２をハンドピース本体A′後
端に接続するには、内管２ａを竹の子ニツプル状
に形成した給気部１ａの外周に嵌合させ、内管２
ａ内の給気路２a′と給気部１ａとを連絡する。 To connect the supply/exhaust hose 2 to the rear end of the handpiece body A', fit the inner tube 2a onto the outer periphery of the air supply section 1a formed in the shape of a bamboo nipple.
The air supply path 2a' in a is connected to the air supply section 1a.

また、給排気ホース２の接続部外周には中間部
に蛇腹部３ａを成形した消音管３を遊嵌し、その
接続側端口をハンドピース本体A′後端外周に嵌
着せしめる。 Further, a muffling pipe 3 having a bellows portion 3a formed in its intermediate portion is loosely fitted onto the outer periphery of the connecting portion of the supply/exhaust hose 2, and its connecting end is fitted onto the outer periphery of the rear end of the handpiece body A'.

これにより、給排気ホース２と消音管３との間
には流路４が形成されると共に、排気部１ｂが給
排気ホース２の排気路２b′と上記流路４とに分岐
され、排気部１ｂを通過する排気流がこの排気路
２b′と流路４とに分流される様に構成する。 As a result, a flow path 4 is formed between the supply and exhaust hose 2 and the muffler pipe 3, and the exhaust section 1b is branched into the exhaust path 2b' of the supply and exhaust hose 2 and the flow path 4, and the exhaust section The exhaust flow passing through 1b is divided into exhaust path 2b' and flow path 4.

そして、上記消音管３の終端口の内径を給排気
ホース２の外径よりも幾分大径に形成することに
より第１排気口５を開設し、消音管３内に流れ込
んだ排気流が蛇腹部３ａを通過して第１排気口５
から排気される様にする。 Then, by forming the inner diameter of the terminal end of the muffler pipe 3 to be somewhat larger than the outer diameter of the supply/exhaust hose 2, a first exhaust port 5 is opened, and the exhaust flow flowing into the muffler pipe 3 is made into a bellows. The first exhaust port 5 passes through the section 3a.
so that it is exhausted from the

給排気ホース２は作業を行なうのに十分な長さ
を確保し、その基端側の内管２ａ端部にコンプレ
ツサーのエアー圧送管（図示せず）に接続する為
の接続プラグ８を嵌装すると共に、外管２ｂの端
部付近を切欠して排気路２b′を開放し、排気口６
を開設する。 The supply/exhaust hose 2 should be long enough to perform the work, and a connection plug 8 for connecting to the air pressure feed pipe (not shown) of the compressor is fitted to the end of the inner pipe 2a on the base end side. At the same time, the vicinity of the end of the outer tube 2b is cut out to open the exhaust passage 2b', and the exhaust port 6 is opened.
will be established.

そして、排気口６外周にはプラスチツクや焼結
金属ビース、若しくは木織布などから成る多孔性
材質を用いて形成した円筒状の消音フイルター７
が被嵌してある。 On the outer periphery of the exhaust port 6, a cylindrical sound deadening filter 7 is formed using a porous material such as plastic, sintered metal beads, or wood woven cloth.
is fitted.

尚、ハンドピース本体A′は工業用であつても、
若しくは歯科用であつても良い。 Furthermore, even if the handpiece body A′ is for industrial use,
Alternatively, it may be used for dentistry.

上記構成のハンドピースＡにコンプレツサーか
ら圧搾空気を供給すると、この圧搾空気は内管２
ａ内の給気路２a′を通過して、給気部１ａよりハ
ンドピース本体A′内の給気流路a₂に流れ込みエ
アーモータa₁を回転させる。 When compressed air is supplied from the compressor to the hand piece A having the above configuration, this compressed air is supplied to the inner tube 2.
The air passes through the air supply path 2a' in the air supply section 1a and flows into the air supply flow path _a2 in the handpiece body A', rotating the air motor _a1 .

エアーモータa₁から出た圧搾空気は排気流路a₃
を通過して排気部１ｂに至り、ここで排気路２
b′と流路４とに分流する。 The compressed air coming out of air motor a ₁ goes to exhaust flow path a ₃
and reaches the exhaust section 1b, where the exhaust path 2
b' and flow path 4.

消音管３内に流れ込んだ排気流は蛇腹部３ａ内
でもつて膨張と収縮を繰り返して消音され、第１
排気口５から排気される。 The exhaust flow that has flowed into the muffler pipe 3 is muffled by repeating expansion and contraction within the bellows part 3a.
The air is exhausted from the exhaust port 5.

一方、排気路２b′に流れ込んだ排気流は給排気
ホース２基端の第２排気口６に至り、該排気口６
に被装した消音フイルター７の多孔構造中を通過
する際に消音されて排気される。 On the other hand, the exhaust flow that has flowed into the exhaust path 2b' reaches the second exhaust port 6 at the base end of the supply/exhaust hose 2, and the exhaust flow flows into the exhaust port 6.
When passing through the porous structure of the sound deadening filter 7 covered with the air, the sound is muffled and exhausted.

而して、ハンドピースＡはエアーモータa₁から
の排気流を排気部１ｂから第１排気口５と第２排
気口６側とに分流し、両排気流を消音管３と消音
フイルター７を介して排気しているので、第１排
気口５及び第２排気部６から発せられる排気ノイ
ズを十分に消音することができる。 Thus, the handpiece A divides the exhaust flow from the air motor _a1 from the exhaust part 1b to the first exhaust port 5 and the second exhaust port 6 side, and distributes both exhaust flows through the muffler pipe 3 and the muffler filter 7. Since the air is exhausted through the exhaust port 5, exhaust noise emitted from the first exhaust port 5 and the second exhaust portion 6 can be sufficiently muffled.

また、第２排気口６の排気ノイズに限つては、
作業者の手元から給排気ホース２の長さ分だけ離
れた所で発せられるので作業者及び患者が実際に
感じる排気ノイズはさらに低減される。 Furthermore, as far as the exhaust noise from the second exhaust port 6 is concerned,
Since the exhaust noise is emitted at a distance from the worker's hand by the length of the supply/exhaust hose 2, the exhaust noise actually felt by the worker and the patient is further reduced.

さらに、エアーモータからの排気流を分流する
と共に分流した一方の排気流を分岐点（排気部）
から近い第１排気口５から排気しているので、排
気抵抗が少なく排気効率の低下を防止し得る。 Furthermore, the exhaust flow from the air motor is divided, and one of the divided exhaust flows is connected to a branch point (exhaust section).
Since the exhaust is discharged from the first exhaust port 5 which is close to the exhaust gas, there is little exhaust resistance and a decrease in exhaust efficiency can be prevented.

尚、排気部１ｂにおける排気流は第１排気口５
側と第２排気口６側とに二分するだけではなく、
その分流比は消音効果や排気効率に応じて任意に
設定するものであり、この為には分岐部における
流路４と排気路２b′との面積比を上記分流比に応
じて設定するものである。 Note that the exhaust flow in the exhaust part 1b is the first exhaust port 5.
Not only is it divided into two parts: the side and the second exhaust port 6 side,
The diversion ratio is arbitrarily set according to the silencing effect and exhaust efficiency, and for this purpose, the area ratio between the flow path 4 and the exhaust path 2b' at the branch part is set according to the above-mentioned diversion ratio. be.

[Brief explanation of the drawing]

第１図は本考案を実施したハンドピースを一部
省略して示す縦断正面図、第２図は同ハンドピー
スの拡大縦断面図、第３図は第２図の−線断
面図である。図中、Ａ……ハンドピース、A′……ハンドピ
ース本体、a₁……エアーモータ、１ａ……給気
部、１ｂ……排気部、２……給排気ホース、２ａ
……内管、２ｂ……外管、２a′……給気路、２
b′……排気路、３……消音管、３ａ……蛇腹部、
５……第１排気口、６……第２排気口、７……消
音フイルター。 FIG. 1 is a partially omitted vertical sectional front view of a hand piece embodying the present invention, FIG. 2 is an enlarged vertical sectional view of the same hand piece, and FIG. 3 is a sectional view taken along the line -- in FIG. In the figure, A...handpiece, A'...handpiece body, a1...air motor, _1a ...air supply section, 1b...exhaust section, 2...supply/exhaust hose, 2a
...Inner pipe, 2b...Outer pipe, 2a'...Air supply path, 2
b'... Exhaust path, 3... Silence pipe, 3a... Bellows part,
5...first exhaust port, 6...second exhaust port, 7...silence filter.

Claims

[Scope of utility model registration request]

In a handpiece that uses an air motor as a drive source, an air supply part and an exhaust part of the air motor are provided at the rear end of the handpiece body, and a double-structured supply and exhaust hose is connected to the rear end of the handpiece body. Connect the air section and the air supply path in the inner pipe of the supply and exhaust hose, loosely fit a silencer tube around the outer periphery of the connection section of the supply and exhaust hose, and fit one end of the tube to the rear end of the handpiece body to open the exhaust section. One end of the muffling pipe is branched and connected to an exhaust path between the inner and outer pipes of the supply/exhaust hose, and the middle part of the muffling pipe is formed into a bellows shape, and a first exhaust port is opened at the other end of the pipe, In addition, the exhaust passage is opened at the base end of the supply/exhaust hose to form a second exhaust port, and a noise filter made of a porous material is attached to the exhaust port.