JP5888809B2 - Dental suction device - Google Patents

Dental suction device Download PDF

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JP5888809B2
JP5888809B2 JP2011251365A JP2011251365A JP5888809B2 JP 5888809 B2 JP5888809 B2 JP 5888809B2 JP 2011251365 A JP2011251365 A JP 2011251365A JP 2011251365 A JP2011251365 A JP 2011251365A JP 5888809 B2 JP5888809 B2 JP 5888809B2
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suction amount
valve
valve box
suction
valve body
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JP2013106623A (en
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岩崎　哲也
哲也 岩崎
小川　和伸
和伸 小川
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Morita Tokyo Manufacturing Corp
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本発明は、吸引量調整機構を備えた歯科用吸引装置に関する。   The present invention relates to a dental suction apparatus provided with a suction amount adjusting mechanism.

従来、歯科治療において、口腔内の歯牙や補綴物の切削や除去等の際に生ずる粉塵や、唾液、薬液等を吸引する歯科用吸引装置には、吸引量調整機構を有するものがあり、一般的に、円柱状の弁体が採用されていた。ここでいう吸引量とは、単位時間当たりの吸引する量である。   Conventionally, in dental treatment, dental suction devices that suck dust, saliva, chemicals, etc. generated when cutting or removing teeth or prostheses in the oral cavity have a suction amount adjustment mechanism, In particular, a cylindrical valve element was employed. The amount of suction here is the amount of suction per unit time.

実用新案登録第３１６５５７１号公報Utility Model Registration No. 3165571

しかし、従来の吸引量調整機構を有する歯科用吸引装置は、長期間使用すると吸引量調整がしにくくなる場合があった。
これは、吸引量調整の際に回転する円柱状の弁体とそれを収納する弁箱側との間の狭い隙間に、口腔内から吸引された切削粉等が挟まり、回転が阻害されるためである。
本発明では、長期間使用しても吸引量調整がしにくくならない歯科用吸引装置を提供する。 However, a dental suction device having a conventional suction amount adjustment mechanism may be difficult to adjust the suction amount when used for a long period of time.
This is because cutting powder or the like sucked from the oral cavity is caught in a narrow gap between the columnar valve body that rotates when adjusting the suction amount and the valve box side that houses it, and rotation is hindered. It is.
The present invention provides a dental suction device that does not make it difficult to adjust the amount of suction even after long-term use.

上記に鑑み本発明者等は鋭意実験研究の結果、下記の手段により課題を解決した。
（１）口腔内の流体を吸引する手持ち型歯科用吸引装置において、流体通路に、吸引量調整用の板体部（２１ａ）とその両端部に直交し、外端面に中心から半径方向へ削成されたガイド溝（２１ｃ）が設けられた円板部（２１ｂ）を有する弁体（２１）と、
前記弁体（２１）を回動自在に摺接・支承する円穴状支持部（２２ａ）を具有する円筒状の弁箱本体（２２ｂ）と、
前記弁箱本体（２２ｂ）が挿嵌され側壁にスリット（２２ｄ）を有する円筒状の弁箱ケース（２２ｃ）とからなる弁箱（２２）と、
前記弁箱ケース(２２ｃ)の側面に被装された、内壁に突起桿（２３ａ）を有する半円筒状のスライド式吸引量調整レバー（２３）とからなる開閉弁を備えてなることを特徴とする歯科用吸引装置。 In view of the above, the present inventors have solved the problem by the following means as a result of intensive experimental research.
(1) In a hand-held dental suction device that sucks fluid in the oral cavity, the fluid passage is perpendicular to the plate portion (21a) for adjusting the suction amount and both ends thereof, and the outer end surface is cut from the center in the radial direction. A valve body (21) having a disc portion (21b) provided with a formed guide groove (21c);
A cylindrical valve box body (22b) having a circular hole-shaped support portion (22a) for slidingly contacting and supporting the valve body (21) in a freely rotatable manner ;
A valve box (22) comprising a cylindrical valve box case (22c) having a slit (22d) on the side wall into which the valve box body (22b) is inserted;
An on-off valve comprising a semi-cylindrical slide type suction amount adjusting lever (23) having a protruding rod (23a) on the inner wall, which is mounted on the side surface of the valve case (22c), is provided. dental suction device to.

本発明によれば次のような優れた効果を発揮することができる。
口腔内の流体を吸引する手持ち型歯科用吸引装置において、流体通路に、
Ａ．吸引量調整用の板体部（２１ａ）とその両端部に直交し、外端面に中心から半径方向へ削成されたガイド溝（２１ｃ）が設けられた円板部（２１ｂ）を有する弁体（２１）と、
Ｂ．前記弁体（２１）を回動自在に摺接・支承する円穴状支持部（２２ａ）を具有する円筒状の弁箱本体（２２ｂ）と、
Ｃ．前記弁箱本体（２２ｂ）が挿嵌されかつ、側壁にスリット（２２ｄ）を有する円筒状の弁箱ケース（２２ｃ）
とからなる弁箱（２２）と、
Ｄ．前記弁箱ケース(２２ｃ)の側面に被装された、内壁に突起桿（２３ａ）を有する半円筒状のスライド式吸引量調整レバー（２３）
とからなる開閉弁を備えてなり、
Ａ弁体（２１）とＢ弁箱本体（２２ｂ）とＣ弁箱ケース（２２ｃ）とＤスライド式吸引量調整レバー（２３）との簡単な構造の各ユニットから成っていて、それらの組立・分解が極めて容易である。
よって、清掃や取替等のメンテナンスも容易であり、また前記吸引量調整レバーの直線運動を前記弁体の回転運動に変換する機構を備えてなり、弁体を回動自在に摺接・支承する円穴状支持部（２２ａ）の支承幅は極小さいため、弁体保持用の円板部と弁箱の間の狭い隙間ができる面積が小さく、そこに切削粉等が挟まり回転を阻害することはほとんどなく、したがって、長期間使用しても吸引量の調整がしにくくならない。
また、前記吸引量調整レバーの移動量に比例して吸引量を直線的に増減することができる。
さらに、施術者が手元で吸引量調整レバーを直線的に操作することにより吸引量の調整ができるので操作性に優れ、例えば口腔内の粘膜を吸引してしまった場合等でも、速やかに吸引を停止することができ、患者の負担も大幅に減少する。 According to the present invention, the following excellent effects can be exhibited.
In a hand-held dental suction device that sucks fluid in the oral cavity,
A. A valve body having a plate part (21a) for adjusting a suction amount and a disk part (21b) provided with a guide groove (21c) which is orthogonal to both end portions thereof and is formed in the outer end surface in a radial direction from the center. (21) and
B. A cylindrical valve box body (22b) having a circular hole-shaped support portion (22a) for slidingly contacting and supporting the valve body (21) in a freely rotatable manner;
C. Cylindrical valve box case (22c) into which the valve box body (22b) is inserted and has a slit (22d) on the side wall
A valve box (22) comprising:
D. A semi-cylindrical slide type suction amount adjusting lever (23) mounted on the side surface of the valve case (22c) and having a protrusion (23a) on the inner wall.
An on-off valve consisting of
It consists of simple units of A valve body (21), B valve box body (22b), C valve box case (22c), and D slide type suction amount adjusting lever (23). Decomposition is extremely easy.
Therefore, maintenance such as cleaning and replacement is easy, and a mechanism for converting the linear motion of the suction amount adjusting lever into the rotational motion of the valve body is provided so that the valve body can be freely slidably contacted and supported. Since the bearing width of the circular hole-shaped support portion (22a) is extremely small, the area where a narrow gap is formed between the disc portion for holding the valve element and the valve box is small, and cutting powder or the like is caught there to inhibit rotation. it is most rather than name, and therefore, not a long period of time difficult to adjust the even suction amount used.
Further, the suction amount can be linearly increased or decreased in proportion to the movement amount of the suction amount adjustment lever.
Furthermore, since the operator can adjust the suction amount by linearly operating the suction amount adjustment lever at hand, it is excellent in operability.For example, even if the mucous membrane in the oral cavity is sucked, the suction is promptly performed. Can be stopped and the burden on the patient is greatly reduced.

また、吸引量調整レバーを直線的にスライドさせると吸引量調整レバーの突起は、スリットを通してガイド溝の側面を押しながらスライドするため、連動してガイド溝の回転角度が変わり、弁体の回転運動に変換されるため、回転直線運動変換を、前記スライドと連動して吸引装置の内部において変換効率良く行なうことができる。 When the suction amount adjustment lever is slid linearly, the protrusion of the suction amount adjustment lever slides while pushing the side of the guide groove through the slit, so the rotation angle of the guide groove changes accordingly, and the valve body rotates. to be converted into a rotational rectilinear motion conversion, as possible out to perform well conversion efficiency inside of the suction device in conjunction with the slide.

歯科用吸引装置の外観斜視図External perspective view of dental suction device 歯科用吸引装置構成分解模式図Disassembled schematic diagram of dental suction device 弁体と吸引量調整レバーの突起との嵌合部分を示す縦断面模式図Longitudinal cross-sectional schematic diagram showing the fitting part between the valve body and the protrusion of the suction amount adjustment lever 弁体の外観斜視図Appearance perspective view of valve body 吸引量最大時の歯科用吸引装置の縦断面図Longitudinal section of dental suction device at maximum suction volume 吸引量最大時の歯科用吸引装置の横断面模式図Cross-sectional schematic diagram of a dental suction device at the maximum suction volume 吸引量最小時の歯科用吸引装置の縦断面図Longitudinal cross section of dental suction device with minimum suction volume 吸引量最小時の歯科用吸引装置の横断面模式図Cross-sectional schematic diagram of a dental suction device with the minimum suction volume 吸引量最大時の吸引量調整レバーと弁体との連動作用説明図Explanatory drawing of interlocking action between suction amount adjustment lever and valve body at maximum suction amount 吸引量中間時の吸引量調整レバーと弁体との連動作用説明図Interlocking action explanatory diagram of the suction amount adjustment lever and the valve body at the middle of the suction amount 吸引量最小時の吸引量調整レバーと弁体との連動作用説明図Interlocking action explanatory diagram of the suction amount adjustment lever and valve body when the suction amount is minimum 従来の歯科用吸引装置の外観斜視一部透視図External perspective partial perspective view of conventional dental suction device 従来の円柱状の弁体を示す外観斜視図External perspective view showing a conventional cylindrical valve body

発明を実施するための形態を以下順次説明する。
図１は本発明の歯科用吸引装置の外観斜視図である。
図において、２は歯科用吸引装置、２２は弁箱、２２ｃは弁箱ケース、２３は吸引量調整レバー、２５はホース、２７はノズル継ぎ手、２８ａカバーａ、２８ｂはカバーｂ、２８ｃはカバーｃを示す。
施術者は吸引量調整用の吸引量調整レバー２３を手指で操作することにより、吸引量を調整することができる。
なお、本図では後記弁体（２１）及び弁箱本体（２２ｂ）は図示されない。 Modes for carrying out the invention will be sequentially described below.
FIG. 1 is an external perspective view of a dental suction apparatus according to the present invention .
In the figure, 2 is a dental suction device, 22 is a valve box, 22c is a valve box case, 23 is a suction amount adjusting lever, 25 is a hose, 27 is a nozzle joint, 28a is a cover a, 28b is a cover b, and 28c is a cover c. Indicates.
The practitioner can adjust the suction amount by operating the suction amount adjustment lever 23 for adjusting the suction amount with fingers.
In addition, a postscript valve body (21) and a valve box main body (22b) are not shown in the drawing.

図２は歯科用吸引装置構成分解模式図。
図において、２２ａは円穴状支持部、２２ｂは弁箱本体、２２ｄはスリット、２３ａは突起桿、２４は流体通路を示す。
なお、本図では弁箱２２に継合されるノズル継ぎ手及びホース側の部分は省略されている。
図示したように、歯科用吸引装置２の吸引量調整機構は、弁体２１と、弁箱本体２２ｂと弁箱ケース２２ｃからなる弁箱２２と、吸引量調節レバー２３によって構成される。
弁体２１は弁箱本体２２ｂの側面に設けられた円穴状支持部２２ａに挿嵌され、
弁箱本体２２ｂと一体としてから、円筒状の弁箱ケース２２ｃの中に挿嵌される。
そして、弁箱ケース２２ｃの外壁面には、その長手方向にスライド可能な半円筒状の吸引量調整レバー２３が設けられてなる。 FIG. 2 is an exploded schematic view of a dental suction apparatus configuration.
In the figure, 22a is a circular hole-shaped support part, 22b is a valve box main body, 22d is a slit, 23a is a protrusion rod , and 24 is a fluid passage.
In this figure, the nozzle joint and hose side portion joined to the valve box 22 are omitted.
As shown in the figure, the suction amount adjusting mechanism of the dental suction device 2 includes a valve body 21, a valve box 22 including a valve box main body 22b and a valve box case 22c, and a suction amount adjusting lever 23.
The valve body 21 is inserted into a circular hole-shaped support portion 22a provided on the side surface of the valve box body 22b,
After being integrated with the valve box body 22b, it is inserted into a cylindrical valve box case 22c.
A semi-cylindrical suction amount adjusting lever 23 slidable in the longitudinal direction is provided on the outer wall surface of the valve case 22c.

図３は弁体と吸引量調整レバー突起との嵌合部分を示す縦断面模式図である。
吸引量調整レバー２３の内壁に垂設された突起桿２３ａ(図２)は、弁箱ケース２２ｃの側壁に開けられたスリット２２ｄを貫挿して、弁体２１のガイド溝２１ｃに遊嵌されている。
吸引量調整レバー２３を弁箱ケースの長手方向にスライドさせると、弁体２１は連動して回転する(図９〜１３参照)。
また、前記弁箱本体２２ｂの円穴状支持部２２ａにおいて、弁体２１の円板部２１ｂの外周の一部が小面積で摺接・支承されていることを示す。 FIG. 3 is a schematic longitudinal sectional view showing a fitting portion between the valve body and the suction amount adjusting lever protrusion.
A protrusion rod 23a ( FIG. 2 ) suspended from the inner wall of the suction amount adjusting lever 23 is inserted through a slit 22d opened in the side wall of the valve case 22c and is loosely fitted in the guide groove 21c of the valve body 21. Yes.
When the suction amount adjusting lever 23 is slid in the longitudinal direction of the valve box case, the valve body 21 rotates in conjunction (see FIGS. 9 to 13 ).
Moreover, in the circular hole-shaped support part 22a of the said valve box main body 22b, it shows that a part of outer periphery of the disc part 21b of the valve body 21 is slidably contacted and supported by a small area.

図４は弁体の外観斜視図である。
図において、２１は弁体、２１ａは板体部、２１ｂは円板部、２１ｃはガイド溝を示す。
図示したように、円板部２１ｂにはその外端面に中心から半径方向へ削成されたガイド溝２１ｃが設けられている。
そして、前記のように円板部２１ｂを回転させると板体部２１ａの角度が変わり、吸引量が変化する。 FIG. 4 is an external perspective view of the valve body.
In the figure, 21 is a valve body, 21a is a plate body part, 21b is a disk part, and 21c is a guide groove.
As shown in the figure, a guide groove 21c is formed on the outer end surface of the disc portion 21b in a radial direction from the center.
And if the disc part 21b is rotated as mentioned above, the angle of the plate part 21a will change and a suction amount will change.

図５は、吸引量最大時の歯科用吸引装置の縦断面図である。
図示したように、流体通路２４に対し吸引量調整用の板体部２１ａは平行となっており、吸引量は最大となる。 FIG. 5 is a vertical cross-sectional view of the dental suction device at the maximum suction amount.
As shown in the drawing, the plate portion 21a for adjusting the suction amount is parallel to the fluid passage 24, and the suction amount is maximized.

図６は吸引量最大時の歯科用吸引装置の横断面模式図で、前記図５のＡ−Ａ断面である。
弁体２１が弁箱本体２２ｂ内に挿着された後、弁箱ケース２２ｃの中に挿着され、さらに、吸引量調整レバー２３が弁箱ケース２２ｃの外壁側面に装着されて、一体となった状態を示す。
また、弁体２１の板体部２１ａは弁箱本体２２ｂの流体通路２４と平行で、板体部２１ａの左右に開口部ができる。
流体通路２４は各構成部品の形状を簡素化するとともに、限られたスペースの中でより大きな流体通路断面積を得るために方形としている。
さらに、弁体２１の円板部２１ｂの外周の一部が小面積で弁箱本体２２ｂの円穴状支持部２２ａに摺接・支承されていることを示している。 Figure 6 is a schematic cross-sectional view of the dental suction device during the suction amount up to an A-A cross section of FIG 5.
After the valve body 21 is inserted into the valve box body 22b, it is inserted into the valve box case 22c, and the suction amount adjusting lever 23 is attached to the side of the outer wall of the valve box case 22c so as to be integrated. Indicates the state.
Further, the plate body portion 21a of the valve body 21 is parallel to the fluid passage 24 of the valve box body 22b, and openings are formed on the left and right sides of the plate body portion 21a.
The fluid passage 24 is rectangular in order to simplify the shape of each component and obtain a larger fluid passage cross-sectional area in a limited space.
Further, it is shown that a part of the outer periphery of the disc portion 21b of the valve body 21 has a small area and is slidably contacted and supported by the circular hole support portion 22a of the valve box body 22b.

図７は吸引量最小時の歯科用吸引装置の縦断面図である。
図示したように、流体通路２４に対し吸引量調整用の板体部２１ａは垂直で流体通路２４を塞ぐため吸引量は最小となる。 FIG. 7 is a longitudinal cross-sectional view of the dental suction device when the suction amount is minimum.
As shown in the drawing, the suction amount adjusting plate body portion 21a is perpendicular to the fluid passage 24 and closes the fluid passage 24, so that the suction amount is minimized.

図８は吸引量最小時の歯科用吸引装置の横断面模式図で、図７のＢ−Ｂ断面である。
構成は前記図６と同様であるが、弁体２１の板体部２１ａは図６の場合から９０°回動し、流体通路２４と垂直となって流体通路を塞いでいるため吸引量は最小となる。 Figure 8 is a schematic cross-sectional view of the dental suction device during the suction amount minimum, a B-B cross section of FIG.
Although the configuration is the same as in FIG. 6 , the plate portion 21a of the valve body 21 is rotated by 90 ° from the case of FIG. 6 and is perpendicular to the fluid passage 24 so as to block the fluid passage. It becomes.

図９は、吸引量最大時の吸引量調整レバーと弁体との連動作用説明図である。
前述したように、弁体２１の保持用の円板部２１ｂは、その両端面に中心から半径方向に削成されたガイド溝２１ｃを有しており、吸引量調整レバー２３は、その内壁の両側に垂設された突起桿２３ａを有している。
また、弁箱ケース２２ｃの側面にはスリット２２ｄが開孔されており、突起桿２３ａはスリット２２ｄを通してガイド溝２１ｃに垂直に遊嵌されている。
そして、吸引量調整レバー２３を可動範囲一杯にスライドさせると、円穴状支持部２２ａによって支持された弁体２１は、突起桿２３ａを介して回動し、図のように吸引量調整用の板体部２１ａは流体通路２４に対して平行となり、吸引量は最大になる。
前記の吸引量調整レバーと弁体との連動作用は、前述した本装置の直線回転運動変換機構によるもので、吸引量調整レバーを直線的にスライドさせると突起は、スリットを通してガイド溝の側面を押しながらスライドするため、連動してガイド溝の回転角度が変わり、弁体の回転運動に変換される。 FIG. 9 is an explanatory view of the interlocking action between the suction amount adjusting lever and the valve body when the suction amount is maximum.
As described above, the disc portion 21b for holding the valve body 21 has the guide grooves 21c cut in the radial direction from the center on both end faces, and the suction amount adjusting lever 23 is formed on the inner wall. It has a protrusion 23a suspended from both sides.
In addition, a slit 22d is opened in the side surface of the valve box case 22c, and the protruding rod 23a is loosely fitted perpendicularly to the guide groove 21c through the slit 22d.
Then, when the suction amount adjusting lever 23 is slid to the full movable range, the valve body 21 supported by the circular hole-shaped support portion 22a rotates through the projection rod 23a, and the suction amount adjusting lever is adjusted as shown in the figure. The plate body portion 21a is parallel to the fluid passage 24, and the suction amount is maximized.
The interlocking action of the suction amount adjusting lever and the valve body is due to the linear rotational motion conversion mechanism of the device described above. When the suction amount adjusting lever is slid linearly, the protrusions pass through the side of the guide groove through the slit. Since it slides while being pushed, the rotation angle of the guide groove changes in conjunction with it and is converted into the rotational motion of the valve element.

図１０は、吸引量中間時の吸引量調整レバーと弁体との連動作用説明図である。
吸引量調整レバー２３を可動範囲の中央付近にスライドさせると、
円穴状支持部２２ａによって支持された弁体２１は、突起桿２３ａを介して回動し、図のように吸引量調整用の板体部２１ａは流体通路２４に対し斜めになり、吸引量は中くらいになる。 FIG. 10 is an explanatory view of the interlocking action between the suction amount adjusting lever and the valve body at the middle of the suction amount.
When the suction amount adjusting lever 23 is slid near the center of the movable range,
The valve body 21 supported by the circular hole-shaped support portion 22a is rotated through the protrusion rod 23a, and the plate body portion 21a for adjusting the suction amount is inclined with respect to the fluid passage 24 as shown in FIG. Is about medium.

図１１は、吸引量最小時の吸引量調整レバーと弁体との連動作用説明図である。
吸引量調整レバー２３を図１３とは反対方向の可動範囲一杯にスライドさせると、円穴状支持部２２ａによって支持された弁体２１は、突起桿２３ａを介して回動し、図のように吸引量調整用の板体部２１ａは流体通路２４に対し垂直となり、吸引量は最小になる。 FIG. 11 is an explanatory view of the interlocking action between the suction amount adjusting lever and the valve body when the suction amount is minimum.
When the suction amount adjusting lever 23 is slid to the full movable range in the direction opposite to that shown in FIG. 13, the valve body 21 supported by the circular hole-shaped support portion 22a rotates via the projection rod 23a, as shown in the figure. The plate portion 21a for adjusting the suction amount is perpendicular to the fluid passage 24, and the suction amount is minimized.

図１２は、従来の歯科用吸引装置の外観斜視一部透視図である。
図において、３は歯科用吸引装置、３１は弁体、３２は弁箱、３２ａは円穴状支持部、３３は吸引量調整レバー、３４は流体通路を示す。
図示したように、弁箱３２の側面に円穴状支持部３２ａが設けられ弁体３１が嵌装されている。
また、前記弁体３１の両外側端は、弁箱３２の外壁に露出されている。
かつ、弁箱３２の外壁に露出された片方の外側面端には、吸引量調整レバー３３が突設されている。
施術者は、吸引量調整レバー３３を操作し、弁体３１を回転させることにより吸引量を調整することができる。 FIG. 12 is a partial perspective view of an external appearance of a conventional dental suction apparatus.
In the figure, 3 is a dental suction device, 31 is a valve body, 32 is a valve box, 32a is a circular hole-shaped support portion, 33 is a suction amount adjusting lever, and 34 is a fluid passage.
As shown in the drawing, a circular hole-shaped support portion 32 a is provided on the side surface of the valve box 32, and the valve body 31 is fitted therein.
Further, both outer ends of the valve body 31 are exposed on the outer wall of the valve box 32.
Further, a suction amount adjusting lever 33 protrudes from one outer surface end exposed on the outer wall of the valve box 32.
The practitioner can adjust the suction amount by operating the suction amount adjustment lever 33 and rotating the valve body 31.

図１３は、従来の円柱状の弁体を示す外観斜視図である。
図において、３１ａは吸引量調整孔、３１ｂは円柱部、３６はＯリングを示す。
図示したように、弁体３１の円柱部３１ｂの側面から吸引量調整孔３１ａが貫通する形で設けられている。
施術者が前記吸引量調整レバー３３を操作することにより、弁体３１は回動される。
それにともない前記流体通路３４に対する吸引量調整孔３１ａの向きが変わり吸引量を調整することができる。
しかし、円柱部３１ｂが弁体３１のほぼ全体を占めるため、弁箱３２と弁体３１との間にできる狭い隙間が常時広い面積にわたって存在し、口腔内から吸引された切削粉等が詰まり、回転が阻害される可能性が高かった。このため吸引量の調整がしにくくなる場合があった。 FIG. 13 is an external perspective view showing a conventional cylindrical valve body.
In the figure, 31a is a suction amount adjusting hole, 31b is a cylindrical portion, and 36 is an O-ring.
As shown in the figure, the suction amount adjusting hole 31a is provided so as to penetrate from the side surface of the cylindrical portion 31b of the valve body 31.
When the practitioner operates the suction amount adjusting lever 33, the valve body 31 is rotated.
Accordingly, the direction of the suction amount adjusting hole 31a with respect to the fluid passage 34 changes, and the suction amount can be adjusted.
However, since the cylindrical portion 31b occupies almost the entire valve body 31, there is always a narrow gap formed between the valve box 32 and the valve body 31 over a wide area, clogged with cutting powder sucked from the oral cavity, Rotation was likely to be inhibited. For this reason, it may be difficult to adjust the suction amount.

２：歯科用吸引装置
２１：弁体
２１ａ：板体部
２１ｂ：円板部
２１ｃ：ガイド溝
２２：弁箱
２２ａ：円穴状支持部
２２ｂ：弁箱本体
２２ｃ：弁箱ケース
２２ｄ：スリット
２３：吸引量調節レバー
２３ａ：突起桿
２４：流体通路
２５：ホース
２７：ノズル継ぎ手
２８ａ：カバーａ
２８ｂ：カバーｂ
２８ｃ：カバーｃ
３：従来の歯科用吸引装置
３１：弁体
３１ａ：吸引量調整孔
３１ｂ：円柱部
３２：弁箱
３２ａ：円穴状支持部
３３：吸引量調整レバー
３４：流体通路
３５：ホース
３６：Ｏリング 2: Dental suction device 21: Valve body 21a: Plate body portion 21b: Disk portion 21c: Guide groove 22: Valve box 22a: Circular hole support portion 22b: Valve box body 22c: Valve box case 22d: Slit 23: Suction amount adjusting lever 23a: protrusion 24: fluid passage 25: hose 27: nozzle joint 28a: cover a
28b: Cover b
28c: Cover c
3: Conventional dental suction device 31: Valve body 31a: Suction amount adjustment hole 31b: Column portion 32: Valve box 32a: Circular hole support portion 33: Suction amount adjustment lever 34: Fluid passage 35: Hose 36: O-ring

Claims (1)

口腔内の流体を吸引する手持ち型歯科用吸引装置において、流体通路に、
吸引量調整用の板体部（２１ａ）とその両端部に直交し、外端面に中心から半径方向へ削成されたガイド溝（２１ｃ）が設けられた円板部（２１ｂ）を有する弁体（２１）と、
前記弁体（２１）を回動自在に摺接・支承する円穴状支持部（２２ａ）を具有する円筒状の弁箱本体（２２ｂ）と、
前記弁箱本体（２２ｂ）が挿嵌され側壁にスリット（２２ｄ）を有する円筒状の弁箱ケース（２２ｃ）とからなる弁箱（２２）と、
前記弁箱ケース(２２ｃ)の側面に被装された、内壁に突起桿（２３ａ）を有する半円筒状のスライド式吸引量調整レバー（２３）とからなる開閉弁を備えてなることを特徴とする歯科用吸引装置。 In a hand-held dental suction device that sucks fluid in the oral cavity,
A valve body having a plate part (21a) for adjusting a suction amount and a disk part (21b) provided with a guide groove (21c) which is orthogonal to both end portions thereof and is formed in the outer end surface in a radial direction from the center. (21) and
A cylindrical valve box body (22b) having a circular hole-shaped support portion (22a) for slidingly contacting and supporting the valve body (21) in a freely rotatable manner;
A valve box (22) comprising a cylindrical valve box case (22c) having a slit (22d) on the side wall into which the valve box body (22b) is inserted ;
It is covered state to the side surface of the valve box casing (22c), and characterized in that it comprises an opening and closing valve consisting of a semi-cylindrical sliding suction amount adjusting lever (23) having a projection rod (23a) on the inner wall Dental suction device to do.
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CH165434A (en) * 1932-08-20 1933-11-30 Egloff David Throttle valve on smoke exhaust pipes.
JPS63135662A (en) * 1986-11-25 1988-06-08 Hitachi Ltd Combined butterfly valve
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US5165891A (en) * 1991-01-18 1992-11-24 Rily Young High-volume ejector with valves and spacing fin
JPH0564575U (en) * 1992-02-05 1993-08-27 岩井機械工業株式会社 Flow control valve
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