JP4434342B2 - Cartridge dental syringe - Google Patents

Cartridge dental syringe Download PDF

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Publication number
JP4434342B2
JP4434342B2 JP27385298A JP27385298A JP4434342B2 JP 4434342 B2 JP4434342 B2 JP 4434342B2 JP 27385298 A JP27385298 A JP 27385298A JP 27385298 A JP27385298 A JP 27385298A JP 4434342 B2 JP4434342 B2 JP 4434342B2
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JP
Japan
Prior art keywords
cartridge
main body
plunger
bore
cylindrical
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.)
Expired - Lifetime
Application number
JP27385298A
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Japanese (ja)
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JP2000102606A (en
Inventor
幸雄 川岸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Showa Yakuhin Kako Co Ltd
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Showa Yakuhin Kako Co Ltd
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Priority to JP27385298A priority Critical patent/JP4434342B2/en
Publication of JP2000102606A publication Critical patent/JP2000102606A/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
    • A61M5/344—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub using additional parts, e.g. clamping rings or collets
    • A61M5/345—Adaptors positioned between needle hub and syringe nozzle
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/3129—Syringe barrels
    • A61M5/3137—Specially designed finger grip means, e.g. for easy manipulation of the syringe rod
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
    • A61M5/347—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub rotatable, e.g. bayonet or screw

Description

【０００１】
【発明の属する分野】
本発明は麻酔液等の注射液を充填したカートリッジを装填して注射操作を行うようになったカートリッジ式歯科用注射器に関する。
【０００２】
【従来の技術】
この種の歯科用注射器は、基本的には、円筒状本体と、本体の先端に螺着された針取付用口金と、本体の後部に固定された引きレバーと、円筒状本体のボア内にあってバネ付勢された芯出し管と、芯出し管を貫いて延び、先端にプランジャーヘッドを、後端に押しレバーを有するプランジャーと、を含む。円筒状本体は、注射液を封入したカートリッジをそのボアに差し込むための窓を備え、本体のボアの内径はカートリッジの外径よりも僅かに大きくなっている。
カートリッジは周知のように、ガラス管の先端を密封するゴム栓を保持し、中央にゴム栓の一部を露出させる円孔を有するアルミキャップを備え、且つガラス管の後端に嵌入され、カートリッジ内に封入される注射液を押し出すためのプランジャーゴムを含んでいる。カートリッジが注射器に装填されたとき、カートリッジは口金と芯出し管との間に確実に保持されるようになっている。両頭注射針を口金に装着してゴム栓側の針をゴム栓に刺してカートリッジの注射液と連絡させ、この段階で、引きレバーに指を掛け、押しレバーを手のひらで押すと、プランジャーが移動してプランジャーゴムを押し進める。歯科口腔治療においては注射時カートリッジ内の注射液を押し出すのに要する力は相当に大きくなければならないことが経験される。
【０００３】
【発明が解決しようとする課題】
このような構成の注射器にはいくつかの課題があった。その１つは、注射器の精度とも関係するが、プランジャーがプランジャーゴムを偏って押したときにカートリッジを構成するガラス管に偏った大きな応力が加わり、ガラス管が割れる事故がまれに発生することである。もう１つは、芯出し管がカートリッジの装填及び位置決めの際に引っ込められたり、バネ付勢により前進したりするとき、芯出し管と本体ボアの内面との大きな面接触により異様な摩擦音が発生し、これが手に不快感として伝わることであった。
本発明の目的は上記の欠点を悉く解消し、極めて理想的なカートリッジ式歯科用注射器を提供することにある。
【０００４】
【課題を解決するための手段】
本発明によれば、円筒状本体と、該本体の先端に螺着された針取付用口金と、本体の後端に固定された引きレバーと、円筒状本体のボア内にあってバネ付勢された芯出し管と、芯出し管を貫いて延び、先端にプランジャーヘッドを、後端に押しレバーを有するプランジャーと、を含み、円筒状本体が、注射液を封入したカートリッジをそのボアに差し込むための窓を備え、本体のボアの内径がカートリッジの外径よりも僅かに大きくなっていて、前記窓をとおして円筒状本体のボア内に装填されたカートリッジが口金と芯出し管との間に保持され、プランジャーヘッドでカートリッジのプランジャーゴムを押すようにした歯科用注射器において、前記芯出し管がプランジャーヘッドを受け入れる受け口を持ったカップを備え、カップの外円筒面が円筒状本体のボアの内面との接触を最小にするために中高円弧状外面として形成されていることを特徴とする、カートリッジ式歯科用注射器を提供する。
【０００５】
更に、本発明によれば、前記プランジャーヘッドの前記プランジャーゴムと接する面を凸型球面として形成したことを特徴とするカートリッジ式歯科用注射器を提供する。
【０００６】
【発明の実施形態】
図1及び２を参照すると、カートリッジ式歯科用注射器の全体が斜視図で示されており、注射器は、円筒状本体１と、本体の先端に螺着された針取付用口金２と、本体の後部に固定された引きレバー３と、円筒状本体１のボア４内にあってバネ付勢された芯出し管５と、芯出し管５を貫いて延び、先端にプランジャーヘッド６を、後端に押しレバー７を有するプランジャー８と、を含む。引きレバー３の円筒状本体１に対する固定は、図２に詳細に示されているように、引きレバー３のボア９の肩１０と円筒状本体１の後端面とを当接させた状態で押さえナット１１を円筒状本体１の後部内面にネジ込むことによって達成される。押さえナット１１は芯出し管５の後端を摺動自在に受け入れてこれを中心に支持するのにも役立つ。芯出し管５のバネ付勢は、芯出し管５の略中間に形成された環状バネ受け１２とナット１１の内端面との間に配置されたコイルバネ１３によって行われ、バネ付勢による芯出し管５の前方移動は、芯出し管５の先端に形成されたカップ１４がボア４の肩１５に当接することによって制限される。カップ１４はプランジャーヘッド６を受け入れる受け口１６を有し、その先端には好ましくは環状傾斜面１７が形成されている。プランジャー８を本体１に対して後方に引くと、そのヘッド６が受け口１６の環状肩１８に当接して芯出し管５をコイルバネ１３の作用に抗して引っ込めることができる。円筒状本体１は、注射液を封入したカートリッジ１９をそのボア４に差し込むための窓２０を備えている。本体のボア４の内径はカートリッジ１９の外径よりも僅かに大きくなっている。
【０００７】
図３及び４に明瞭に示されているように、カートリッジ１９は周知のように、ガラス管２１の先端を密封するゴム栓２２を保持し、中央にゴム栓２２の一部を露出させる円孔２３を有するアルミキャップ２４を備え、且つガラス管の後端に嵌入され、カートリッジ内に封入される注射液を押し出すためのプランジャーゴム２５を含んでいる。カートリッジを注射器に装填するには、注射器を斜め上に向けて、カートリッジをそのプランジャーゴム２５の方から窓２０を通して本体１のボア４に差し込む。この状態では、カートリッジの先端のアルミキャップ２４の方は窓２０の縁に引っかかって本体に対して斜めに待機する。プランジャー８及び芯出し管５を引っ込めると、それにつられて、カートリッジ１９は自重でボア４の中へ移動し、ついには窓２０を通り抜けてボア４の中へ落ち込む。プランジャー８から手を放すと、芯出し管５がコイルバネ１３の作用で前進してカップ１４の環状傾斜面１７でカートリッジのガラス管２１を押してカートリッジ１９を口金２と芯出し管５との間に確実に保持する。
【０００８】
口金２はその内部中央に、カートリッジ１９のゴム栓２２乃至アルミキャップ２４に作用するようになった球形凸部２６を備え、又、プランジャーヘッド６はその先端面にプランジャーゴム２５をその中心で押すようになった凸型球面２７を有する。
芯出し管５のカップ１４の外円筒面は本体１のボア４の内面との接触を最小にするために中高円弧状外面２８として形成されている。
先に述べたように、カートリッジ１９が注射器に装填されて口金２とバネ付勢された芯出し管５とで保持された状態で、口金２に両頭式注射針を装填して一方の針先でカートリッジのゴム栓２２を突き刺して注射液と連通させ、次いで、指を引きレバー３に掛け、押しレバー７を手のひらで強く押すと、プランジャー８がプランジャーゴム２５を押して注射液を針から放出させる。このような注射操作の初期の段階において、カートリッジに充填されている注射液がプランジャーゴム２５によって押出圧力を受けると、アルミキャップ２４が球形凸部２６に押しつけられてキャップ２４の円孔２３と同心に内向きに変形し、そのことによりカートリッジが僅かに首振り運動してボアの中心に固定されることになる。一方、注射操作中、プランジャー８のプランジャーヘッド６の僅かな凸型球形面により、プランジャーゴム２５にはその中心に圧力が加えられることになり、その結果、プランジャーゴム２５はガラス管に偏応力を加えることなく直線的に真っ直ぐ押される。加えて、芯出し管５のプランジャー８による引き戻しやコイルスプリングによる前進の際、芯出し管５は本体ボアの内面との最小な接触のため、摩擦抵抗なく円滑に摺動し、従来のような異様な摩擦音を発したり、手に伝わる不快なザラザラ感、微間欠的な摺動抵抗をもたらしたりすることがない。
【図面の簡単な説明】
【図１】本発明によるカートリッジ式歯科用注射器の斜視図である。
【図２】本発明によるカートリッジ式歯科用注射器の一部断面側面図である。
【図３】図１のＡ−Ａ線における拡大断面図である。
【図４】図２のＢ−Ｂ線における拡大断面図である。
【符号の説明】
１ 円筒状本体
２ 口金
３ 引きレバー
４ ボア
５ 芯出し管
６ プランジャーヘッド
７ 押しレバー
８ プランジャー
１４ カップ
１６ 受け口
１９ カートリッジ
２０ 窓
２２ ゴム栓
２３ 円孔
２４ アルミキャップ
２５ プランジャーゴム
２６ 球形凸部
２７ 凸型球面
２８ 中高円弧状外面[0001]
[Field of the Invention]
The present invention relates to a cartridge-type dental syringe in which a cartridge filled with an injection solution such as an anesthetic solution is loaded to perform an injection operation.
[0002]
[Prior art]
This type of dental syringe basically includes a cylindrical main body, a needle mounting base screwed to the tip of the main body, a pull lever fixed to the rear part of the main body, and a bore of the cylindrical main body. And a spring-biased centering tube and a plunger extending through the centering tube and having a plunger head at the front end and a push lever at the rear end. The cylindrical main body is provided with a window for inserting a cartridge enclosing an injection solution into the bore, and the inner diameter of the bore of the main body is slightly larger than the outer diameter of the cartridge.
As is well known, the cartridge includes an aluminum cap that holds a rubber stopper that seals the tip of the glass tube, has a circular hole that exposes a portion of the rubber stopper in the center, and is fitted into the rear end of the glass tube. It includes a plunger rubber for extruding the injection solution enclosed inside. When the cartridge is loaded into the syringe, the cartridge is securely held between the base and the centering tube. Attach the double-headed injection needle to the base and stab the rubber stopper side needle into the rubber stopper to contact the cartridge injection solution.At this stage, put your finger on the pull lever and push the push lever with your palm. Move and push the plunger rubber forward. In dental and oral treatment, it is experienced that the force required to push out the injection solution in the cartridge during injection must be quite large.
[0003]
[Problems to be solved by the invention]
The syringe having such a configuration has several problems. One is related to the accuracy of the syringe, but when the plunger pushes the plunger rubber biased, a large stress is applied to the glass tube constituting the cartridge, and an accident that the glass tube breaks rarely occurs. That is. The other is that when the centering tube is retracted when the cartridge is loaded and positioned, or when the centering tube is moved forward by a spring force, an unusual frictional sound is generated due to the large surface contact between the centering tube and the inner surface of the main body bore. However, this was transmitted to the hands as discomfort.
The object of the present invention is to overcome the above-mentioned drawbacks and to provide a very ideal cartridge type dental syringe.
[0004]
[Means for Solving the Problems]
According to the present invention, a cylindrical main body, a needle mounting base screwed to the front end of the main body, a pulling lever fixed to the rear end of the main body, and a spring bias in the bore of the cylindrical main body And a plunger having a plunger head at the front end and a plunger having a push lever at the rear end, and the cylindrical body includes a cartridge enclosing an injection solution therein. The inner bore of the main body is slightly larger than the outer diameter of the cartridge, and the cartridge loaded into the bore of the cylindrical main body through the window has a base and a centering tube. A dental syringe that is held between and having a plunger head that pushes the plunger rubber of the cartridge, wherein the centering tube includes a cup having a receptacle for receiving the plunger head, and an outer cylinder of the cup There, characterized in that it is formed as a convex arc-shaped outer surface to minimize contact with the bore of the inner surface of the cylindrical body, to provide a cartridge type dental syringe.
[0005]
Furthermore, according to the present invention, there is provided a cartridge type dental syringe characterized in that a surface of the plunger head that contacts the plunger rubber is formed as a convex spherical surface.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Referring to FIGS. 1 and 2, the entire cartridge type dental syringe is shown in a perspective view. The syringe includes a cylindrical main body 1, a needle mounting base 2 screwed to the tip of the main body, A pulling lever 3 fixed to the rear part, a spring-biased centering pipe 5 in the bore 4 of the cylindrical main body 1, and extending through the centering pipe 5, with a plunger head 6 at the tip, And a plunger 8 having a push lever 7 at its end. The pulling lever 3 is fixed to the cylindrical body 1 with the shoulder 10 of the bore 9 of the pulling lever 3 and the rear end surface of the cylindrical body 1 in contact with each other as shown in detail in FIG. This is accomplished by screwing the nut 11 into the rear inner surface of the cylindrical body 1. The holding nut 11 also serves to slidably receive the rear end of the centering tube 5 and support it in the center. The spring biasing of the centering pipe 5 is performed by a coil spring 13 disposed between the annular spring receiver 12 formed substantially in the middle of the centering pipe 5 and the inner end surface of the nut 11. The forward movement of the tube 5 is limited by the cup 14 formed at the tip of the centering tube 5 coming into contact with the shoulder 15 of the bore 4. The cup 14 has a receiving port 16 for receiving the plunger head 6, and an annular inclined surface 17 is preferably formed at the tip thereof. When the plunger 8 is pulled backward with respect to the main body 1, the head 6 comes into contact with the annular shoulder 18 of the receiving port 16, and the centering tube 5 can be retracted against the action of the coil spring 13. The cylindrical main body 1 includes a window 20 for inserting a cartridge 19 enclosing an injection solution into the bore 4 thereof. The inner diameter of the bore 4 of the main body is slightly larger than the outer diameter of the cartridge 19.
[0007]
As clearly shown in FIGS. 3 and 4, as is well known, the cartridge 19 holds a rubber plug 22 that seals the tip of the glass tube 21, and a circular hole that exposes a part of the rubber plug 22 in the center. 23, and includes a plunger rubber 25 which is inserted into the rear end of the glass tube and for extruding an injection solution sealed in the cartridge. In order to load the cartridge into the syringe, the cartridge is inserted into the bore 4 of the main body 1 through the window 20 from the plunger rubber 25 with the syringe directed diagonally upward. In this state, the aluminum cap 24 at the tip of the cartridge is caught by the edge of the window 20 and stands by at an angle with respect to the main body. When the plunger 8 and the centering tube 5 are retracted, the cartridge 19 is moved by its own weight into the bore 4 and finally passes through the window 20 and falls into the bore 4. When the plunger 8 is released, the centering tube 5 moves forward by the action of the coil spring 13 and the glass tube 21 of the cartridge is pushed by the annular inclined surface 17 of the cup 14 to move the cartridge 19 between the base 2 and the centering tube 5. Hold it securely.
[0008]
The base 2 is provided with a spherical convex portion 26 adapted to act on the rubber plug 22 or the aluminum cap 24 of the cartridge 19 at the center of the inside of the base 2, and the plunger head 6 has the plunger rubber 25 at its center on the tip surface thereof. And has a convex spherical surface 27 that is adapted to be pushed by the.
The outer cylindrical surface of the cup 14 of the centering tube 5 is formed as a medium-high arcuate outer surface 28 in order to minimize contact with the inner surface of the bore 4 of the main body 1.
As described above, with the cartridge 19 loaded in the syringe and held by the base 2 and the spring-biased centering tube 5, a double-ended injection needle is loaded into the base 2 and one needle tip is inserted. Then, the rubber stopper 22 of the cartridge is pierced to communicate with the injection solution, and then the finger is pulled on the lever 3 and the push lever 7 is pushed firmly with the palm of the hand. Release. In such an initial stage of the injection operation, when the injection solution filled in the cartridge is subjected to an extrusion pressure by the plunger rubber 25, the aluminum cap 24 is pressed against the spherical convex portion 26, and the circular hole 23 of the cap 24 and It is concentrically inwardly deformed, which causes the cartridge to swing slightly and be fixed in the center of the bore. On the other hand, during the injection operation, the slight convex spherical surface of the plunger head 6 of the plunger 8 causes pressure to be applied to the plunger rubber 25 at the center thereof. It is pushed straight straight without applying a bias stress. In addition, when the centering tube 5 is pulled back by the plunger 8 or advanced by the coil spring, the centering tube 5 slides smoothly without frictional resistance because of the minimum contact with the inner surface of the body bore. It does not make any unusual frictional noises or bring about unpleasant roughness and minute intermittent sliding resistance.
[Brief description of the drawings]
FIG. 1 is a perspective view of a cartridge type dental syringe according to the present invention.
FIG. 2 is a partial cross-sectional side view of a cartridge-type dental syringe according to the present invention.
FIG. 3 is an enlarged cross-sectional view taken along line AA in FIG.
4 is an enlarged cross-sectional view taken along line BB in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cylindrical main body 2 Base 3 Pull lever 4 Bore 5 Centering pipe 6 Plunger head 7 Push lever 8 Plunger 14 Cup 16 Receiving port 19 Cartridge 20 Window 22 Rubber plug 23 Circular hole 24 Aluminum cap 25 Plunger rubber 26 Spherical convex part 27 Convex spherical surface 28 Medium-high arc-shaped outer surface

Claims (2)

円筒状本体と、該本体の先端に螺着された針取付用口金と、本体の後端に固定された引きレバーと、円筒状本体のボア内にあってバネ付勢された芯出し管と、芯出し管を貫いて延び、先端にプランジャーヘッドを、後端に押しレバーを有するプランジャーと、を含み、円筒状本体が、注射液を封入したカートリッジをそのボアに差し込むための窓を備え、本体のボアの内径がカートリッジの外径よりも僅かに大きくなっていて、前記窓をとおして円筒状本体のボア内に装填されたカートリッジが口金と芯出し管との間に保持され、プランジャーヘッドでカートリッジのプランジャーゴムを押すようにした歯科用注射器において、前記芯出し管がプランジャーヘッドを受け入れる受け口を持ったカップを備え、カップの外円筒面が円筒状本体のボアの内面との接触を最小にするために中高円弧状外面として形成されていることを特徴とする、カートリッジ式歯科用注射器。  A cylindrical main body, a needle mounting base screwed to the front end of the main body, a pulling lever fixed to the rear end of the main body, and a spring-biased centering tube in the bore of the cylindrical main body; A plunger head extending through the centering tube, a plunger head at the tip, and a plunger having a push lever at the rear end, the cylindrical body having a window for inserting a cartridge enclosing the injection solution into the bore The inner bore of the main body is slightly larger than the outer diameter of the cartridge, and the cartridge loaded into the bore of the cylindrical main body through the window is held between the base and the centering tube, In a dental syringe in which the plunger rubber of the cartridge is pushed by the plunger head, the centering tube includes a cup having a receptacle for receiving the plunger head, and the outer cylindrical surface of the cup has a cylindrical body. Characterized in that it is formed in contact with the A of the inner surface as convex arcuate outer surface in order to minimize cartridge dental syringe. 前記プランジャーヘッドの前記プランジャーゴムと接する面を凸型球面として形成したことを特徴とする請求項１に記載のカートリッジ式歯科用注射器。 2. The cartridge type dental syringe according to claim 1, wherein a surface of the plunger head that contacts the plunger rubber is formed as a convex spherical surface.
JP27385298A 1998-09-28 1998-09-28 Cartridge dental syringe Expired - Lifetime JP4434342B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27385298A JP4434342B2 (en) 1998-09-28 1998-09-28 Cartridge dental syringe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27385298A JP4434342B2 (en) 1998-09-28 1998-09-28 Cartridge dental syringe

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JP2000102606A JP2000102606A (en) 2000-04-11
JP4434342B2 true JP4434342B2 (en) 2010-03-17

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11679202B2 (en) 2018-06-21 2023-06-20 Kabushiki Kaisha Shofu Injector capable of suppressing subsequent dripping of fluid

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
CN105395275A (en) * 2015-12-18 2016-03-16 武汉金光电子器械有限公司 Impression material injector
CN106994199A (en) * 2017-05-16 2017-08-01 上海博洽医疗器械有限公司 It is easy to the injector for medical purpose of one-handed performance
CN113509614A (en) * 2021-08-19 2021-10-19 尹建明 Syringe piston and syringe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11679202B2 (en) 2018-06-21 2023-06-20 Kabushiki Kaisha Shofu Injector capable of suppressing subsequent dripping of fluid

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