JP2005021640A - Jet force measuring apparatus for needleless syringe - Google Patents

Jet force measuring apparatus for needleless syringe Download PDF

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JP2005021640A
JP2005021640A JP2003287194A JP2003287194A JP2005021640A JP 2005021640 A JP2005021640 A JP 2005021640A JP 2003287194 A JP2003287194 A JP 2003287194A JP 2003287194 A JP2003287194 A JP 2003287194A JP 2005021640 A JP2005021640 A JP 2005021640A
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jet flow
outer peripheral
diameter
syringe
jet
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Eisuke Fujimoto
頴助 藤本
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  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a measuring apparatus capable of grasping the force of jet flow 5 by numerical measurement to easily evaluate a needleless syringe by solving a problem of conventional sensory evaluation through cut-and-try by actually carrying out hypodermic injection one by one due to difficulty in preparing a measuring instrument because a diaphragm 16 of a detecting load cell 15 is broken by the jet flow 5. <P>SOLUTION: This outstanding jet force measuring apparatus simple in structure and easy to operate with reliability is composed of the load cell 15 formed to disperse the high pressure of the jet flow to impart it to the diaphragm 16; an outlet of a supply channel 24 with a small diameter provided above a dispersion part 26; and an outer peripheral holder 22 fitted to the tip outer peripheral end part 3 of the syringe 7. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

発明の詳細な説明Detailed Description of the Invention

本発明は、医療用に用いられる無針注射器の測定に関し、特にノズルより射出するジェット流の力特性を測定し無針注射器を評価する測定装置に関する。  The present invention relates to measurement of a needleless syringe used for medical purposes, and more particularly to a measuring apparatus for measuring a force characteristic of a jet flow ejected from a nozzle and evaluating the needleless syringe.

各図面の符号に付いては、作用等が同じ物は説明の重複を避ける為に同じ付番として表現する。また測定器の垂直方向の中心軸となる垂直測定軸Ｙ０−Ｙ１より要素部品及び被測定物等が偏った位置にあるときは、芯ずれしていると略して表現する。また図１（従来の無針注射器の説明断面図）、図２（従来の測定装置で離れた距離での測定説明断面図）、図３（従来の測定装置で至近距離での測定説明断面図（ダイアフラム動作詳細図を含む））を用いて従来技術を説明する。  For the reference numerals of the drawings, the same action and the like are expressed as the same number in order to avoid duplication of explanation. Further, when an element part, a measured object, etc. are at a position deviated from the vertical measurement axis Y0-Y1, which is the central axis in the vertical direction of the measuring instrument, it is simply expressed as being misaligned. Fig. 1 (Cross-sectional view of a conventional needleless syringe), Fig. 2 (Cross-sectional view of measurement at a distance away by a conventional measuring device), Fig. 3 (Cross-sectional view of measurement by a conventional measuring device at a close distance) The prior art will be described with reference to (including a detailed diagram of diaphragm operation).

従来の無針注射器は、図１に示すのように、使い捨てのシリンジ７を駆動装置１０に接続して注射するものが知られている、このシリンジ７は薬液６とピストン４とを内装し、その先端には微少な直径のノズル１と後方には駆動装置１０に装着する装置部８（図ではネジの例を示している）とを設けている。  As shown in FIG. 1, a conventional needleless syringe is known in which a disposable syringe 7 is connected to a driving device 10 for injection. The syringe 7 includes a drug solution 6 and a piston 4. A nozzle 1 having a very small diameter is provided at the tip, and a device portion 8 (an example of a screw is shown in the figure) attached to the driving device 10 at the rear.

また駆動装置１０は高圧で駆動するスプリング１２（図では機械式の圧縮バネの例を示しているが、気体の圧縮バネも知られている）とドライブシャフト１１を設け、そのドライブシャフト１１の先端は前記ピストン４の後方で一体に接続しピストン４を駆動するように構成している。  The drive device 10 is provided with a spring 12 that is driven at a high pressure (a mechanical compression spring is shown in the figure, but a gas compression spring is also known) and a drive shaft 11, and the tip of the drive shaft 11 is provided. Is configured to be integrally connected behind the piston 4 to drive the piston 4.

注射の時は、皮膚１３にシリンジ７の先端を押しつけて注射するが、薬液６はノズル１を介して皮膚１３の内部にジエット流５として注入されるように構成されている。前記のジェット流５は皮膚１３に対して垂直に注入しないと、皮膚１３の表面に開ける注入穴が楕円になり血液飛散や薬液流出など注射効果を下げる事になる。その為にシリンジ７を皮膚１３に対し垂直に保持する様にノズル１の先端近傍の形状は工夫されている。  At the time of injection, the tip of the syringe 7 is pressed against the skin 13 for injection, but the drug solution 6 is configured to be injected as a jet flow 5 into the skin 13 through the nozzle 1. If the jet flow 5 is not injected perpendicularly to the skin 13, the injection hole opened on the surface of the skin 13 becomes an ellipse, and the injection effect such as blood scattering and chemical outflow is lowered. Therefore, the shape in the vicinity of the tip of the nozzle 1 is devised so as to hold the syringe 7 perpendicular to the skin 13.

すなわち図１に示すように、ノズル１を中心軸とした台形状あるいは球面状のノズル台２とシリンジ７の外周先端には外周端部３が設けられている。ノズル台２の高さは外周端部３の高さよりも高差ＳＣ（たとえば２ｍｍ）だけ高く構成されている。  That is, as shown in FIG. 1, the outer peripheral end 3 is provided at the outer peripheral tip of the trapezoidal or spherical nozzle base 2 and the syringe 7 with the nozzle 1 as the central axis. The height of the nozzle base 2 is configured to be higher than the height of the outer peripheral end 3 by a height difference SC (for example, 2 mm).

図示の他の符号の補足をする。ロック機構１４は指でスライドする事で圧縮されたスプリング１２の駆動力を拘止や解放する機構である。外周端部外径Ｆはシリンジ７の外周端部３の外径である。また外周端部３の形状について更に説明する。台形状のリング形状の外周端部外径Ｆはシリンジ７の外径より図１のように大きく作られたものや、図２のようなシリンジ７の外径と同じ径の外周端部外径Ｆのものもある。  The other reference numerals shown in the figure are supplemented. The lock mechanism 14 is a mechanism that holds or releases the driving force of the spring 12 compressed by sliding with a finger. The outer peripheral end outer diameter F is the outer diameter of the outer peripheral end 3 of the syringe 7. Further, the shape of the outer peripheral end 3 will be further described. The trapezoidal ring-shaped outer peripheral end outer diameter F is larger than the outer diameter of the syringe 7 as shown in FIG. 1, or the outer peripheral end outer diameter of the same diameter as the outer diameter of the syringe 7 as shown in FIG. Some are F.

このように構成されているので、外周端部３を皮膚１３に押圧する事でシリンジ７は垂直に保持されるとともに、皮膚１３は緊張した状態になり、その皮膚１３に更に高差ＳＣだけ高いノズル台２が更に押しつけられ、ノズル１は皮膚１３に密着する。このように構成され作用するのでノズル１は皮膚１３に垂直に保持され密着して位置し、ジェット流５は液漏れなく皮膚１３に垂直に注入する事が出来る。  Since it is configured in this manner, the syringe 7 is held vertically by pressing the outer peripheral end 3 against the skin 13, and the skin 13 is in a tensioned state, and the skin 13 is further higher by the height difference SC. The nozzle base 2 is further pressed, and the nozzle 1 comes into close contact with the skin 13. Since it is configured and operates in this manner, the nozzle 1 is held vertically in close contact with the skin 13, and the jet stream 5 can be injected vertically into the skin 13 without leakage.

発明が解決しようとする課題Problems to be solved by the invention

ジエット流５の力は、初期においては皮膚１３に穴を開ける為に急激に高い力を与えるように設定される。後半では続いて、開けられたその穴を介して薬液６を皮膚１３の組織に拡散注入するように作用する為にジエット流５の力は初期力より低い力に設定される。これらジエット流５の初期と後半の力は、皮膚１３への穴開けの損傷を少なく、注入痛みの少ない注射をするために適切な値にそれぞれ選定されて調整される。  The force of the jet flow 5 is initially set so as to apply a high force rapidly in order to make a hole in the skin 13. In the latter half, the force of the jet flow 5 is set to a force lower than the initial force in order to act so as to diffuse and inject the drug solution 6 into the tissue of the skin 13 through the opened hole. The initial and second half forces of the jet flow 5 are selected and adjusted to appropriate values in order to perform injection with less damage to the skin 13 and less injection pain.

またジエット流５の前記の初期と後半の力は、ノズル１のアスペクト比（穴の直径と長さの比）や、シリンジ７のノズル１の後方内部に徐々に広がる開口部の形状や、ピストン４の先端の流線型の形状や、スプリング１２の圧縮解放特性などにより影響を受ける為に、設計段階で慎重にそれらの形状等が実際に皮膚１３に注射したりしてカットアンドトライの実験を繰り返し、その結果で選ばれ調整されてきた。このために開発時間や経費が嵩む欠点が有った。  The initial and second half forces of the jet flow 5 are the aspect ratio of the nozzle 1 (ratio of hole diameter to length), the shape of the opening that gradually spreads behind the nozzle 1 of the syringe 7, the piston Since it is influenced by the streamlined shape of the tip of 4 and the compression release characteristics of the spring 12, the shape and the like are carefully injected into the skin 13 at the design stage, and cut and try experiments are repeated. The results have been selected and adjusted. For this reason, there was a drawback that development time and cost increased.

よって、ジエット流５の力を測定して、各種の調整の結果を評価し無針注射器を開発したり、その測定結果より製品の品質を管理したりするような、信頼性のある測定装置の出現が望まれていた。  Therefore, a reliable measuring device that measures the force of the jet flow 5, evaluates the results of various adjustments, develops a needleless syringe, and manages the product quality from the measurement results. The appearance was desired.

次にそれらの目的の為に、検討された従来技術の延長上の測定装置について図２と図３を用いて説明する。駆動装置１０に付いたシリンジ９（通常は薬液８の代わりに水を内蔵して測定する）を水平台１６に設置して、ノズル１の先端位置より離れた距離ＳＤの位置に検出面が垂直になるようロードセル１５を設け、ノズル１よりのジエット流５の力を測定するように、従来技術の測定装置は構成し測定していた。更にロードセル１５の検出出力は検出増幅器２９を介してデータ採取表示装置２０でデータ収集され時間対力特性として表示していた。（時間対力特性を以後説明の簡易化のため力特性Ｎｎと略す。また前記のロードセル１５は過度特性の良い電気抵抗線式の防水型ダイアフラム型のものがこの力特性Ｎｎを測定するために用いられている。）  Next, for these purposes, a measuring device on the extension of the prior art studied will be described with reference to FIGS. A syringe 9 (usually measured by incorporating water instead of the chemical solution 8) attached to the drive device 10 is installed on the horizontal base 16, and the detection surface is perpendicular to the position of the distance SD away from the tip position of the nozzle 1. The load cell 15 is provided so that the force of the jet flow 5 from the nozzle 1 is measured, and the conventional measuring device is configured and measured. Further, the detection output of the load cell 15 is collected by the data collection display device 20 via the detection amplifier 29 and displayed as a time-force characteristic. (The time-force characteristic will be abbreviated as force characteristic Nn for the sake of simplification of the description. The load cell 15 is a waterproof diaphragm type electric resistance wire type having a good transient characteristic in order to measure the force characteristic Nn. Used.)

しかし、この従来技術の装置では一応目安としての力持性Ｎｎは得られるものの、ノズル１近傍で皮膚１５に穴を開けるジエット流５の実際の力特性Ｎｎよりも誤差が大きく、再現性等が問題となっていた。  However, although this apparatus of the prior art can obtain a force Nn as a guide, the error is larger than the actual force characteristic Nn of the jet flow 5 that makes a hole in the skin 15 near the nozzle 1, and reproducibility is a problem. It was.

すなわち離れた距離ＳＤを大きく設定すると、ジエット流５の飛翔距離が伸びる為に重力で下方に曲がってダイアフラム１６の検出面に到達する欠点があった。この方法では距離が伸びる為に、ジエット流５は拡散する傾向があり、更にその道中にある風や揺らぎのある空気などの影響を受けてロードセル１５の表面でのジエット流５の位置がバラツキ、測定した力特性Ｎｎの再現性や誤差の問題を大きくする欠点があった。  That is, if the distance SD is set to be large, the flight distance of the jet flow 5 is extended, so that there is a drawback that it is bent downward by gravity and reaches the detection surface of the diaphragm 16. In this method, since the distance increases, the jet flow 5 tends to diffuse, and the position of the jet flow 5 on the surface of the load cell 15 varies due to the influence of wind and fluctuation air in the road. There was a drawback that the problem of reproducibility and error of the measured force characteristic Nn was increased.

これらの欠点を無くすために図３に示すように、ノズル１近傍の至近距離ＳＬにロードセル１５を設定すると以下の危険があつて実用にならなかった。すなわちロードセル１５のダイアフラムは大きな面積で力を受けて測定する様に構成されていた。また特にジエット流５を測定する為には５Ｎ以下の鋭敏なロードセル１５が必要で、これらのダイアフラ厶１６は薄く作られていた。一方ジエット流５の直径は細い、例えば至近距離ＳＬ＝１０ｍｍの時の検出流の直径ＤＪは略φ０．２となる。従って微少断面積の為に、図２のダイアフラム動作の詳細図に示すように、ダイアフラム１６は微少範囲のみ高い圧力で部分的に押されて凹み、出力誤差を発生する危険が有った。  In order to eliminate these drawbacks, as shown in FIG. 3, if the load cell 15 is set at a close distance SL in the vicinity of the nozzle 1, there has been the following danger and it has not been put into practical use. That is, the diaphragm of the load cell 15 is configured to measure by receiving a force in a large area. In particular, in order to measure the jet flow 5, a sensitive load cell 15 of 5N or less is required, and these diaphragms 16 are made thin. On the other hand, the diameter of the jet flow 5 is thin. For example, the diameter DJ of the detection flow when the close distance SL = 10 mm is approximately φ0.2. Therefore, because of the small cross-sectional area, as shown in the detailed diagram of the diaphragm operation in FIG. 2, the diaphragm 16 is partially pushed by a high pressure only in a very small range and dents, and there is a risk of generating an output error.

更にダイアフラムが薄いので強度的に弱く、繰り返し使用すると微少な凹みが出来誤差が増加し、最終的には貫通孔が出来て使用出来なくなる欠点が有った。従って至近距離ＳＬの信頼性のある測定は出来なかった。  Furthermore, since the diaphragm is thin, it is weak in strength, and when it is used repeatedly, a slight dent is formed, resulting in an increase in error, and finally a through hole is formed, which makes it impossible to use. Therefore, reliable measurement of the close distance SL was not possible.

このように従来技術の延長上の測定装置は多くの欠点を有していたので、より構造簡単に、またノズル１の近傍の位置で正確な力特性Ｎｎを測定可能とし、再現性や誤差の無い、更に耐久性の得られる信頼性のある無針注射器の力測定装置が求められていた。As described above, the measuring device on the extension of the prior art has many drawbacks. Therefore, it is possible to measure the force characteristic Nn more easily with a simpler structure and at a position near the nozzle 1, and the reproducibility and error can be reduced. There has been a need for a reliable needle-less syringe force measuring device that does not have any further durability.

課題を解決するための手段Means for solving the problem

上記の目的を達成するために本発明の無針注射器用の力測定装置は、無針注射器のジェツト流（５）を検討した結果、添付図面、図４（本発明の第１の実施例の測定装置の説明断面図（分散部詳細図含む））と、図５（本発明の第１の実施例のＡ・Ｂホルダの説明斜視図）と、図６（本発明の第２の実施例の測定装置の説明断面図）と図７（本発明の測定装置で測定したジェット流の力特性評価図）に示すように構成して解決する。  In order to achieve the above object, the force measuring device for a needleless syringe according to the present invention has studied the jet flow (5) of the needleless syringe, and as a result, the accompanying drawings, FIG. 4 (the first embodiment of the present invention) Cross-sectional view of the measuring apparatus (including the detailed view of the dispersing portion), FIG. 5 (perspective view of the A / B holder of the first embodiment of the present invention), and FIG. 6 (second embodiment of the present invention) The configuration is solved as shown in FIG. 7 (a sectional view for explaining the measuring device) and FIG. 7 (evaluation diagram of force characteristics of a jet flow measured by the measuring device of the present invention).

重力の影響での曲がりを無くす為に、測定するジエット流５を垂直で下方向（Ｙ０−Ｙ１の測定軸）に射出するように構成する。  In order to eliminate the bending due to the influence of gravity, the jet flow 5 to be measured is configured to be ejected vertically and downward (measurement axis of Y0-Y1).

更に風などの影響を防ぐ為にノズル１の近傍の至近距離ＳＬで測定し、入射されるジェツト流５の周辺は可能な限り外界より遮断する。  Further, in order to prevent the influence of wind and the like, measurement is performed at a close distance SL in the vicinity of the nozzle 1, and the vicinity of the jet stream 5 that is incident is blocked from the outside as much as possible.

至近距離ＳＬでの微少な検出流直径ＤＪの高い圧力でダイアフラム１６が破壊されないように、ダイアフラム１６の中央に、防水性と剛性の高い材質で、ジェツト流の検出流直径ＤＪの１０倍以上の直径の平らな分散部上面２７を設けた円柱状の分散部２６を構成し、微少直径のジェツト流５の力をロードセル１５のダイアフラム１６に分散して与えるようする。In order to prevent the diaphragm 16 from being destroyed by the high pressure of the minute detection flow diameter DJ at the close distance SL, the center of the diaphragm 16 is made of a waterproof and rigid material, and is more than 10 times the detection flow diameter DJ of the jet flow. A cylindrical dispersion portion 26 provided with a dispersion portion upper surface 27 having a flat diameter is formed, and the force of the jet flow 5 having a minute diameter is dispersedly applied to the diaphragm 16 of the load cell 15.

すなわち直径が１０倍とすると断面積比より圧力は１／１００になるのでダイアフラム１６の破損や劣化を防ぎ、また繰り返し誤差など無くす事が出来る。また分散部２６の上面がほぼ平らな面としているので垂直に射出されるジェツト流５のわずかな芯ずれによる誤り検出も少なく出来る。That is, when the diameter is 10 times, the pressure becomes 1/100 from the cross-sectional area ratio, so that the diaphragm 16 can be prevented from being damaged or deteriorated, and repeated errors can be eliminated. In addition, since the upper surface of the dispersion portion 26 is a substantially flat surface, error detection due to slight misalignment of the jet flow 5 injected vertically can be reduced.

更に分散部２６はステンレスのような防水性や剛性の高い材質で設けるので変形等による誤り検出も長期間少なく出来る。またセラミックコーティングなどやメッキで表面を更に硬質処理しても良い。更に分散部上面２７が水平な平ら面であるので測定器の校正時に、この面に分銅を乗せて校正出来るので、品質のトレーサビリティが容易に得られるメリットもある。Further, since the dispersing portion 26 is provided with a material having high waterproofness and rigidity such as stainless steel, error detection due to deformation or the like can be reduced for a long period of time. Further, the surface may be further hardened by ceramic coating or plating. Further, since the upper surface 27 of the dispersion portion is a horizontal flat surface, calibration can be performed by placing a weight on this surface at the time of calibration of the measuring instrument, and there is an advantage that quality traceability can be easily obtained.

分散部２６の中心にめがけて垂直にジエット流５を射出させ、常に所定の至近距離ＳＬで測定可能とするために、外周端部３の外周端部外径Ｆに嵌合する内径の凹部壁面のガイド２９と、ノズル１の先端位置と外周端部３の先端の位置との高さの差の高差ＳＣに応じた位置の底板２８とを有する外周ホルダ２２を設け、その外周ホルダ２２を分散部２６の上側の所定の至近距離ＳＬに構成する。A wall surface of a recessed portion with an inner diameter that fits to the outer diameter F of the outer peripheral end 3 so that the jet flow 5 is injected vertically toward the center of the dispersing portion 26 and can always be measured at a predetermined close distance SL. The outer peripheral holder 22 having a guide 29 and a bottom plate 28 at a position corresponding to the height difference SC of the height difference between the tip position of the nozzle 1 and the tip position of the outer peripheral end 3 is provided. A predetermined close distance SL on the upper side of the dispersion unit 26 is configured.

この様に構成するので、外周ホルダ２２にシリンジ７の先端を嵌合挿入するだけでノズル１よりの所定の至近距離ＳＬより、ジェット流５を垂直に芯ずれなく射出する事が容易に出来る。従って同じ種類の多くの無針注射器でも、皮膚１３に注射する操作と同じように短時間に繰り返し誤差無く測定出来る。With this configuration, it is possible to easily eject the jet flow 5 vertically without misalignment from a predetermined close distance SL from the nozzle 1 simply by fitting and inserting the tip of the syringe 7 into the outer peripheral holder 22. Therefore, even with many needleless syringes of the same type, measurement can be repeated repeatedly in a short time without error, as in the case of the operation of injecting into the skin 13.

また測定中に誤って斜めにジェツト流５を射出したときにダイアフラム１６を破壊しないように、ジェツト流５を流入させる入水路２４を分散部２６の上側に設け、且つ前記入水路２４の出口側の内径ＤＰを分散部上面２７より小さな内径で構成する。Further, in order to prevent the diaphragm 16 from being destroyed when the jet flow 5 is accidentally injected during measurement, a water inlet 24 for allowing the jet flow 5 to flow is provided on the upper side of the dispersion portion 26 and the outlet side of the water inlet 24 is provided. Is formed with an inner diameter smaller than that of the upper surface 27 of the dispersion portion.

すなわち、入水路２４の出口の内径ＤＰをノズル１の設定位置の芯ずれを見越した小さな値とする。（例えば分散部直径ＤＳをφ４のときは、出口の内径ＤＰをφ１．６とする。）よつて斜めに入射されたジェット流５は分散部２６の外側のダイアフラム１６には直接到達しない。よつて、誤った操作で斜めにジェット流５が射出されても、ロードセル１５の破壊や劣化を防止できる。That is, the inner diameter DP of the outlet of the water inlet 24 is set to a small value that allows for misalignment of the set position of the nozzle 1. (For example, when the dispersion part diameter DS is φ4, the inner diameter DP of the outlet is φ1.6.) Therefore, the jet flow 5 incident obliquely does not directly reach the diaphragm 16 outside the dispersion part 26. Therefore, even if the jet stream 5 is ejected obliquely by an erroneous operation, the load cell 15 can be prevented from being destroyed or deteriorated.

このように本発明は構成するので、熟練者でなくとも、容易な操作で、繰り返し誤差無く、短時間に同じ種類の多くの無針注射器の測定評価をする事が出来る。Since the present invention is configured as described above, even a non-skilled person can easily evaluate and evaluate many needleless syringes of the same type in a short time without repeated errors.

高差ＳＣあるいは外周端部外径Ｆの異なる種類のシリンジ７を測定したいときは、図５に示すように外周ホルダ２２を交換するだけで同様に測定出来る。  When it is desired to measure different types of syringes 7 having different height SC or outer peripheral end outer diameter F, the same measurement can be performed by simply replacing the outer peripheral holder 22 as shown in FIG.

本発明の具体的な内容について図４〜７を用い各実施例に基づいて説明する。Specific contents of the present invention will be described based on each embodiment with reference to FIGS.

（第１の実施例）
始めに本発明の測定装置で用いるロードセル１５について図４の分散部の詳細図を用いて説明する。ダイアフラム１６の中央に、防水性と剛性の高い材質で、ジェツト流の検出流直径ＤＪの１０倍以上の直径で且つ水平な平面の分散部上面２７を設けた円柱状の分散部２６を構成し、微少直径のジェツト流５の力をロードセル１５のダイアフラム１６に分散して与えるようにする。(First embodiment)
First, the load cell 15 used in the measuring apparatus of the present invention will be described with reference to the detailed view of the dispersion unit in FIG. At the center of the diaphragm 16, a cylindrical dispersion part 26 is formed which is made of a highly waterproof and rigid material and has a horizontal flat dispersion part upper surface 27 having a diameter of 10 times or more the detected flow diameter DJ of the jet stream. The force of the jet flow 5 having a small diameter is distributed and applied to the diaphragm 16 of the load cell 15.

ノズル１の内径をφ０．１８としたシリンジ７を所定の至近距離ＳＬの１０ｍｍで測定する具体的な構成と作用について図４を用いて第１実施例で説明する。この時のジェット流の検出流直径ＤＪはほぼφ０．２となるので、平面の分散部上面２７の直径ＤＳは芯ずれを考慮し余裕を持ってφ４とし、その分散部の高さＨＳは１．７ｍｍとし、ステンレスの円柱状の部材で分散部２６を設け、この分散部２６をダイアフラム１６の中央に設けるようにしてロードセル１５は構成する。  A specific configuration and operation of measuring the syringe 7 having an inner diameter of the nozzle 1 of φ0.18 at a predetermined close distance SL of 10 mm will be described in the first embodiment with reference to FIG. Since the detected flow diameter DJ of the jet flow at this time is approximately φ0.2, the diameter DS of the flat dispersion portion upper surface 27 is set to φ4 with allowance for misalignment, and the height HS of the dispersion portion is 1 The load cell 15 is configured so that the dispersion portion 26 is provided with a cylindrical member made of stainless steel and the dispersion portion 26 is provided at the center of the diaphragm 16.

この様に構成するので、図５の分散部詳細図のように検出流直径ＤＪがφ０．２のジェツト流の強い圧力でも分散部の直径ＤＳのφ４との断面積比（略２＊１０−３）に応じて分散されダイアフラム１６を広い範囲で軽く押すことになる。また分散部の上面２７が平面で有るので、ジェツト流のわずかな芯ずれ（±０．５）が有っても分散部の直径ＤＳがφ４であるので、その面積での分散により実験的には誤差は認められなかった。With this configuration, the cross-sectional area ratio (approximately 2 * 10 − 3 ) The diaphragm 16 is dispersed according to 3 ) and lightly presses the diaphragm 16 in a wide range. Further, since the upper surface 27 of the dispersion portion is a flat surface, even if there is a slight misalignment (± 0.5) of the jet flow, the diameter DS of the dispersion portion is φ4. There was no error.

ロードセル１５の検出過度特性を悪化させないためには、この分散部２６は出来るだけ小型である事がのぞまれるが、前記の第１の実施例の分散部２６のサイズでは、無針注射器の力特性の測定用としては実用上問題がない大きさである。  In order not to deteriorate the excessive detection characteristics of the load cell 15, it is desirable that the dispersion portion 26 be as small as possible. However, with the size of the dispersion portion 26 according to the first embodiment, the force characteristics of the needleless syringe are used. This is a size that does not cause any practical problems.

またこの分散部２６の表面をセラミックコーティングやハードクロムメッキなどで表面を更に硬質処理しても良い。Further, the surface of the dispersion portion 26 may be further hard-treated with ceramic coating or hard chrome plating.

次にジェツト流５を所定の至近距離ＳＬから垂直に射出する為の手段について説明する。測定する無針注射器の外周端部外径Ｆに嵌合する内径の凹んだ壁面のガイド２９と、ノズル１の先端位置と外周端部３の先端の位置との高さの差の高差ＳＣに応じた位置の底板２８とを有する外周ホル２２を設け、外周ホルダ２２を分散部２６の上側の所定の至近距離ＳＬに構成する。  Next, means for injecting the jet flow 5 vertically from a predetermined close distance SL will be described. The height difference SC of the difference in height between the guide 29 on the wall surface with the concave inner diameter fitted to the outer diameter F of the outer peripheral end of the needleless syringe to be measured and the position of the tip of the nozzle 1 and the position of the tip of the outer peripheral end 3 An outer peripheral hol 22 having a bottom plate 28 at a position corresponding to the position is provided, and the outer peripheral holder 22 is configured to have a predetermined close distance SL above the dispersing portion 26.

外周端部３の外周端部外径Ｆがφ３０の径で、更にノズル１との高差ＳＣが２ｍｍに設けられたシリンジ７の第１の実施例で、具体的に外周ホルダ２２を説明する。  In the first embodiment of the syringe 7 in which the outer peripheral end portion outer diameter F of the outer peripheral end portion 3 is φ30 and the height difference SC from the nozzle 1 is 2 mm, the outer peripheral holder 22 will be specifically described. .

ここでは外周ホルダ２２は、内径がφ２０．２の壁面のガイド２９と、厚さがほぼ２ｍｍの底板２８とを設けた外周ホルダ２２を設ける。この外周ホルダ２２の底板２８の下面の位置が、分散部２６の上方の至近距離ＳＬの１０ｍｍの位置に構成する。Here, the outer peripheral holder 22 is provided with an outer peripheral holder 22 provided with a guide 29 on the wall surface having an inner diameter of φ20.2 and a bottom plate 28 having a thickness of approximately 2 mm. The position of the lower surface of the bottom plate 28 of the outer peripheral holder 22 is configured at a position of 10 mm of the closest distance SL above the dispersion portion 26.

従ってこの外周ホルダ２２に外周端部外径Ｆのφ２０のシリンジ７の先端を上方より嵌合設置するだけで、ノズル１は至近距離ＳＬの１０ｍｍの位置に設定出来、しかもジェツト流５を垂直に芯ずれ無く射出する事が容易に出来る。  Therefore, the nozzle 1 can be set at a position of 10 mm of the closest distance SL by merely fitting and installing the tip of the φ7 syringe 7 having the outer diameter F of the outer peripheral end to the outer peripheral holder 22 from the upper side, and the jet flow 5 is made vertical. Easy injection without misalignment.

このように皮膚１３に注射する時とほぼ同じように、外周ホルダ２２に当てるだけの操作で容易にシリンジ７を正しい位置と垂直に設定が可能で、測定誤り無く測定が容易に出来る。As in the case of injection into the skin 13 as described above, the syringe 7 can be easily set perpendicularly to the correct position by simply touching the outer peripheral holder 22, and measurement can be easily performed without measurement errors.

更にまた測定中に誤って斜めにジェツト流５を射出したときにダイアフラム１６を破壊しないように、ジェツト流５を流入させる入水路２４を分散部２の上側に設け、且つその入水路２４の出口側の内径ＤＰを分散部上面２７より小さな内径で構成する。Furthermore, a water inlet 24 for allowing the jet flow 5 to flow is provided on the upper side of the dispersing portion 2 so that the diaphragm 16 is not destroyed when the jet flow 5 is accidentally injected obliquely during measurement, and the outlet of the water inlet 24 is provided. The inner diameter DP on the side is configured with an inner diameter smaller than the upper surface 27 of the dispersion portion.

第１実施例ではノズル１の設定位置の芯ずれを考慮して、分散部直径ＤＳをφ４とし、出口の内径ＤＰをφ１．６として構成する。In the first embodiment, in consideration of misalignment of the set position of the nozzle 1, the dispersion portion diameter DS is set to φ4, and the outlet inner diameter DP is set to φ1.6.

この入水路２４の出口はノズル１の位置より出来るだけ遠い位置とし、分散部上面２７の近傍の位置とする。このようにする事で誤った斜め射出のジエット流５を防ぐ効果が高くなる。ここでは入水路２４の長さは出来るだけ長く選んで７ｍｍの長さとしている。よってジェット流５が損失無く通り抜けられる傾斜角は略１０°以下であり、φ４の分散部６の外側の薄いダイアフラム１６には傾斜したジェツト流５は直接到達させる事は無い。  The outlet of the water inlet 24 is positioned as far as possible from the position of the nozzle 1 and is positioned in the vicinity of the upper surface 27 of the dispersing portion. By doing in this way, the effect which prevents the jet flow 5 of the erroneous diagonal injection becomes high. Here, the length of the water intake channel 24 is selected to be as long as possible, and the length is 7 mm. Therefore, the inclination angle through which the jet flow 5 passes without loss is approximately 10 ° or less, and the inclined jet flow 5 does not directly reach the thin diaphragm 16 outside the dispersion portion 6 of φ4.

ロードセル１５と外周ホル２２と入水路２４について説明したが、それらの要素が組み合わされた測定器の全体の構成について次に第１実施例で具体的に補足説明する。Although the load cell 15, the outer peripheral hol 22, and the water inlet 24 have been described, the overall configuration of the measuring instrument in which these elements are combined will be specifically described in the first embodiment.

測定器の基盤となる測定ベース２１は、ステンレス等の剛性と防水性の高い材質で設け、その測定ベース２１の中央に分散部２６付きのロードセル１５を上方に向けて設け、更に排水路２５をロードセル１５の下方周辺に複数設けて水はけを良くするように構成する。  A measurement base 21 serving as a base of the measuring instrument is provided with a material having high rigidity and water resistance such as stainless steel, a load cell 15 with a dispersion portion 26 is provided upward in the center of the measurement base 21, and a drainage channel 25 is further provided. A plurality is provided around the lower portion of the load cell 15 to improve drainage.

この測定ベース２１の上方に、ステンレス等の剛性と防水性の高い材質で基準台２３を設ける。この基準台２３の上面の位置は、分散部上面２７より所定の至近距離ＳＬになるように設ける。Above the measurement base 21, a reference table 23 is provided with a material having high rigidity and water resistance such as stainless steel. The position of the upper surface of the reference table 23 is provided so as to be a predetermined close distance SL from the dispersion portion upper surface 27.

前述の入水路２４は、ここでは、この基準台２３の中央に垂直に設ける。このように構成されているので、基準台２３の中央にシリンジ７のノズル１を当接すると、この入水路２４を通して至近距離ＳＬにあるロードセル１５でジェット流の力を検出できる。Here, the water inlet 24 is provided vertically in the center of the reference table 23. Since it is configured in this manner, when the nozzle 1 of the syringe 7 is brought into contact with the center of the reference table 23, the force of the jet flow can be detected by the load cell 15 at the closest distance SL through the water inlet 24.

また次に外周ホルダ２２は基準台２３の上面に印籠３１で案内されて芯ずれ無く設置される。従ってこの外周ホルダ２２のガイド２９と底板２８にシリンジ７の外周端部３を嵌合設置するだけで、シリンジ７が垂直に保持されてノズル１より下方垂直にジェット流５を所定の至近距離ＳＬ（ここでは１０ｍｍ）より射出する事が出来るようになる。（図５のマーカ３０は外周ホルダ無しでシリンジ７を臨時的に設置測定するときの参考用のリングマーカである。）  Next, the outer peripheral holder 22 is installed on the upper surface of the reference table 23 with a stamp 31 and installed without misalignment. Accordingly, by simply fitting and installing the outer peripheral end 3 of the syringe 7 to the guide 29 and the bottom plate 28 of the outer peripheral holder 22, the syringe 7 is held vertically and the jet stream 5 is vertically directed downward from the nozzle 1 by a predetermined close distance SL. (10mm here) can be ejected. (The marker 30 in FIG. 5 is a ring marker for reference when the syringe 7 is temporarily installed and measured without an outer peripheral holder.)

次にロードセル１５の出力は、検出増幅器１９を介してデータ採取表示装置２０にて採取されて力特性Ｎｎとして表示され、無針注射器のジエット流の評価に供される。  Next, the output of the load cell 15 is collected by the data collection display device 20 through the detection amplifier 19 and displayed as a force characteristic Nn, and is used for evaluating the jet flow of the needleless syringe.

このように第１実施例の測定装置は、皮膚１３に注射する操作と同様な操作、すなわち外周ホルダー２２にシリンジ７を押し当てジェツト流を射出するだけの簡単な操作により、無針注射器のジエット流の評価ＤＡＴＡを容易に得ることが出来る。また繰り返し実験などでもロードセル１５の劣化も無く、更に誤った操作でジェツト流が斜めに射出されても故障発生は防げ、よって信頼性の高いジェツト流の力測定器を提供出来る。  As described above, the measuring apparatus of the first embodiment is similar to the operation for injecting into the skin 13, that is, by simply pressing the syringe 7 against the outer peripheral holder 22 and injecting the jet flow, the jetless needle jet. Flow evaluation DATA can be easily obtained. Further, there is no deterioration of the load cell 15 even in repeated experiments, and even if the jet flow is injected obliquely by an erroneous operation, the occurrence of a failure can be prevented, so that a highly reliable jet flow force measuring device can be provided.

Ａ社製・Ｂ社製など異なる種類の無針注射器を評価をしたい場合がある。この場合はシリンジ７の先端の形状が異なった複数のシリンジ７を評価する事になるので高差ＳＣや外周端部外径Ｆの値がそれぞれ変わってくる。従ってこの場合は、図５に示す様にＡホルダ２２ＡとＢホルダ２２Ｂの様に、高差ＳＣや外周端部外径Ｆの異なった２種類の外周ホルダ２２を設け、それらを付け替えるだけで、前述の様な簡単な操作で、互いの特性を対比出来るＤＡＴＡを簡単に得られ測定評価出来る。  There are cases where it is desired to evaluate different types of needleless syringes such as those manufactured by Company A and Company B. In this case, since the plurality of syringes 7 having different tip shapes of the syringes 7 are evaluated, the height difference SC and the outer peripheral end portion outer diameter F are changed. Therefore, in this case, as shown in FIG. 5, two types of outer peripheral holders 22 having different height differences SC and outer peripheral end outer diameters F are provided, such as A holder 22A and B holder 22B. By the simple operation as described above, DATA that can compare the characteristics of each other can be easily obtained and measured and evaluated.

趣旨を逸脱しない範囲で種々変更して本発明は応用する事が出来る。すなわち図６の第２実施例は、前述装置を１部変更して、生産ライン等での品質検査用として、特定のシリンジ７のジェット流の力測定装置とした応用した例を示している。説明の重複を避けて以下簡単に説明する。  The present invention can be applied with various modifications without departing from the spirit of the invention. That is, the second embodiment of FIG. 6 shows an example in which a part of the above-described device is changed and used as a force measuring device for a jet flow of a specific syringe 7 for quality inspection in a production line or the like. The following is a brief description that avoids duplication of explanation.

測定ベース２１の上に外周ホルダ２２を直接取り付け、その外周ホルダ２２に入水路２４を構成する。ノズル１は外周ホルダ２２の上面に直接触れる事がなく、シリンジ７は外周端部３で所定の至近距離ＳＬの位置に垂直に保持される。この場合の測定操作は、第１実施例同様に簡単な操作で測定が出来る。  An outer peripheral holder 22 is directly attached on the measurement base 21, and a water inlet path 24 is formed in the outer peripheral holder 22. The nozzle 1 does not directly touch the upper surface of the outer peripheral holder 22, and the syringe 7 is held vertically at a predetermined close distance SL at the outer peripheral end 3. The measurement operation in this case can be performed by a simple operation as in the first embodiment.

図７は本発明の測定装置で製品Ａと製品Ｂを同一量の水を射出してジェツト流の力特性Ｎｎを測定した時の評価図の例を示す。縦軸の単位はジェツト流の力をＮで示し、横軸は射出した時間をＳＥＣで表している。製品Ａは前半で皮膚１３に孔を開けるに十分な急激な立ち上がりの強い力を示し、また後半では薬液６を痛み少なく送り込むに十分な弱い力と時間で作動している事が分かる。一方製品Ｂでは全体に力が低く同じ量の水を射出するのに時間が掛かっている事がわかり、これらからＢ製品は異常な原因を内在している事が評価できる。  FIG. 7 shows an example of an evaluation diagram when the force characteristic Nn of the jet flow is measured by injecting the same amount of water into the products A and B with the measuring apparatus of the present invention. The unit of the vertical axis indicates the jet flow force by N, and the horizontal axis indicates the injection time by SEC. It can be seen that the product A has a strong force of abrupt rise enough to open a hole in the skin 13 in the first half, and that the second half is operating with a weak force and time sufficient to feed the drug solution 6 with little pain. On the other hand, it can be seen that product B has a low force as a whole and takes time to inject the same amount of water, and from these, it can be evaluated that B product has an abnormal cause.

更に、射出する水の所定量とノズル１の内径（断面積）はあらかじめ判っているので、この図より射出される時間を読み取りノズル１の近傍のジェット流の速度の概要も推定可能となる。Further, since the predetermined amount of water to be injected and the inner diameter (cross-sectional area) of the nozzle 1 are known in advance, it is possible to estimate the jet flow velocity in the vicinity of the nozzle 1 by reading the injection time from this figure.

このように構成し作用するので、第１あるいは第２の実施例で説明したように、多くの課題を解決し、本発明は、簡単な構造で、操作容易な、信頼性に優れた無針注射器用のジェツト流の力測定装置を提供できる。Since it is configured and operates in this way, as described in the first or second embodiment, many problems are solved, and the present invention has a simple structure, is easy to operate, and has excellent reliability. A jet flow force measuring device for a syringe can be provided.

発明の効果The invention's effect

効果については前述で詳細に述べたので、ここでは簡単に主な効果を列挙して説明する。  Since the effects have been described in detail above, the main effects will be briefly listed and described here.

請求項１の記載の様に、無針注射器のジェツト流の微少な検出流の直径の１０倍の径の分散部をロードセルに構成するので、薄いダイアフラムを用いた敏感なロードセルでも破損や劣化を防止でき、長期の繰り返し測定でも信頼性の高いジェツト流の力特性の測定が出来る。  As described in claim 1, since the load cell has a dispersion portion having a diameter 10 times the diameter of the minute detection flow of the jet flow of the needleless syringe, even a sensitive load cell using a thin diaphragm can be damaged or deteriorated. It is possible to measure the force characteristics of jet flow with high reliability even in long-term repeated measurement.

更にロードセルの破損や劣化の心配が無いのでジェツト流を至近距離で測定出来るので、ノズル１近傍の挙動がつかめる事と合わせ、風など外乱の影響なく、精度の良いジェツト流の力特性を知ることが出来る。  In addition, since there is no risk of damage or deterioration of the load cell, the jet flow can be measured at a close distance, and in addition to grasping the behavior in the vicinity of the nozzle 1, know the force characteristics of the jet flow with high accuracy without the influence of wind and other disturbances. I can do it.

また分散上面２７が水平で平らな面で有るので、この面に分銅を乗せて（重力加速度で演算する事で力（Ｎ）が判る）測定器の校正が出来、測定器で重要なトレイサビリティを容易に得ることが出来る。In addition, since the dispersion upper surface 27 is a horizontal and flat surface, a measuring instrument can be calibrated by placing a weight on this surface (the force (N) can be determined by calculating with gravitational acceleration), and the traceability that is important for the measuring instrument. Can be easily obtained.

請求項２の記載のように外周ホルダ２２を測定器に構成するので、皮下への注射と同様な容易な操作で、常にジェツト流を所定の至近距離より垂直に射出する事が出来、信頼性の高いジェツト流の力特性の測定が出来るSince the outer circumference holder 22 is configured as a measuring instrument as described in claim 2, the jet flow can always be ejected vertically from a predetermined close distance by an easy operation similar to the subcutaneous injection, and the reliability. Can measure the force characteristics of high jet flow

請求項３のように入水路を分散部の上側に設け、且つ入水路の出口の内径を分散部上面より小さな内径で構成したので、誤って斜めにジェット流が射出されても、ロードセルが破壊される事をが無い。よって長期間安定に動作出来る。Since the inlet channel is provided on the upper side of the dispersing portion and the inner diameter of the outlet of the inlet channel is smaller than the upper surface of the dispersing portion as in claim 3, the load cell is destroyed even if the jet flow is accidentally ejected obliquely. There is nothing to be done. Therefore, it can operate stably for a long time.

更に本発明の測定器は操作が容易で有るので、短時間に多くの無針注射器を誤差無く測定をする事が出来る。  Furthermore, since the measuring instrument of the present invention is easy to operate, many needleless syringes can be measured without error in a short time.

また図７に示すように力特性図では時間が読めるのでジェット流の速度の概要を推定する事も出来る。Further, as shown in FIG. 7, since the time can be read in the force characteristic diagram, it is possible to estimate the outline of the jet flow velocity.

このように本発明は、無針注射器のジェツト流の持つ独特な多くの課題を解決し、またジェツト流の力特性の測定を、皮下注射をすると同様な簡単な操作で、誰にでも容易に測定可能とし、長期にわたり安定した動作を保証できる信頼性の高い測定装置を簡単な構造で提供出来る。  As described above, the present invention solves many unique problems of the jet flow of a needleless syringe, and makes it easy for anyone to measure the force characteristics of the jet flow with the same simple operation as subcutaneous injection. It is possible to provide a highly reliable measuring device with a simple structure that can measure and guarantee stable operation over a long period of time.

従来の無針注射器の説明断面図である。It is explanatory sectional drawing of the conventional needleless syringe. 従来の測定装置で離れた距離での測定説明断面図である。It is a measurement explanation sectional view in the distance apart with the conventional measuring device. 従来の測定装置で至近距離での測定説明断面図である。（ダイアフラム動作の詳細図を含む）It is a measurement explanatory sectional view in the near distance with the conventional measuring device. (Including detailed view of diaphragm operation) 本発明の第１の実施例の測定装置の説明断面図である。（分散部詳細図を含む）It is explanatory sectional drawing of the measuring apparatus of 1st Example of this invention. (Including details of dispersion section) 本発明の第１の実施例のＡ・Ｂホルダの説明斜視図である。It is an explanatory perspective view of the A / B holder of the first embodiment of the present invention. 本発明の第２の実施例の測定装置の説明断面図である。It is explanatory sectional drawing of the measuring apparatus of the 2nd Example of this invention. 本発明の測定装置で測定したジェット流の力特性評価図である。It is force characteristic evaluation figure of the jet flow measured with the measuring device of the present invention.

符号の説明Explanation of symbols

１ ノズル
２ ノズル台
３ 外周端部
４ ピストン
５ ジエット流
６ 薬液
７ シリンジ
８ 装置部
１０ 駆動装置
１１ ドライブシャフト
１２ スプリング
１３ 皮膚
１４ ロック機構
１５ ロードセル
１６ ダイアフラム
１７ 水平台
１９ 検出増幅器
２０ データ採取表示装置
２１ 測定ベース
２２ 外周ホルダ
２２Ａ Ａホルダ
２２Ｂ Ｂホルダ
２３ 基準台
２４ 入水路
２５ 排水路
２６ 分散部
２７ 分散部上面
２８ 底板
２９ ガイド
３０ マーカー
３１ 印籠
Ｆ 外周端部外径
Ｎｎ 力特性
ＤＪ 検出流の直径（ＳＬの位置の径）
ＤＰ 出口の内径
ＨＳ 分散部の高さ
ＤＳ 分散部の直径
ＳＣ 高差
ＳＤ 離れた距離
ＳＬ 至近距離
Ｘ０、Ｘ１ 水平の測定軸
Ｙ０、Ｙ１ 垂直の測定軸DESCRIPTION OF SYMBOLS 1 Nozzle 2 Nozzle base 3 Outer peripheral edge part 4 Piston 5 Jet flow 6 Chemical solution 7 Syringe 8 Device part 10 Drive device 11 Drive shaft 12 Spring 13 Skin 14 Lock mechanism 15 Load cell 16 Diaphragm 17 Horizontal stand 19 Detection amplifier 20 Data collection display device 21 Measurement base 22 Peripheral holder 22A A holder 22B B holder 23 Reference base 24 Inlet channel 25 Drain channel 26 Dispersion unit 27 Dispersion unit top surface 28 Bottom plate 29 Guide 30 Marker 31 Seal F F Outer peripheral end outer diameter Nn Force characteristic DJ Detected flow diameter ( SL position diameter)
DP Outer diameter HS Dispersion height DS Dispersion diameter SC Height difference SD Distance SL Distance X0, X1 Horizontal measurement axis Y0, Y1 Vertical measurement axis

Claims (3)

無針注射器の微少直径のジエット流（５）の力を測定する測定装置において、垂直に射出したジエット流（５）を検出するロードセル（１５）のダイアフラム（１６）の中央に、防水性と剛性の高い材質で、ジェツト流の検出流直径（ＤＪ）の１０倍以上の直径で且つ水平な平面の分散部上面（２７）を設けた円柱状の分散部（２６）を構成し微少直径のジェツト流（５）の力をロードセル（１５）のダイアフラム（１６）に分散して与えるようにした事を特徴とするジエット流の力測定装置。  In a measuring device that measures the force of a fine diameter jet flow (5) of a needleless syringe, waterproof and rigid in the center of the diaphragm (16) of the load cell (15) that detects the jet flow (5) injected vertically A cylindrical dispersion part (26) having a diameter of 10 times or more of the detected jet diameter (DJ) of the jet stream and provided with a horizontal dispersion part upper surface (27), and having a very small diameter. A jet flow force measuring device characterized in that the flow (5) force is distributed and applied to the diaphragm (16) of the load cell (15). 測定する無針注射器の外周端部外径（Ｆ）に嵌合する内径の凹部を有するガイド（２９）と、ノズル（１）の先端位置と外周端部（３）の先端の位置との高さの差の高差（ＳＣ）に応じた位置の底板（２８）とを有する外周ホルダ（２２）を設け、前記外周ホルダ（２２）を前記分散部（２６）の上側の所定の至近距離（ＳＬ）に構成し、前記外周ホルダ（２２）に無針注射器のシリンジ（７）の先端を嵌合挿入し、ノズル（１）よりの至近距離（ＳＬ）で簡単にジェット流（５）を測定する事を可能とした事を特徴とする請求項１記載のジエット流の力測定装置。  The height of the guide (29) having a concave portion with an inner diameter that fits to the outer diameter (F) of the outer peripheral end of the needleless syringe to be measured, and the height of the tip position of the nozzle (1) and the tip position of the outer peripheral end (3) An outer peripheral holder (22) having a bottom plate (28) at a position corresponding to the height difference (SC) of the difference in height is provided, and the outer peripheral holder (22) is placed at a predetermined close distance (above the dispersion portion (26)) ( SL), the tip of the syringe (7) of a needleless syringe is fitted and inserted into the outer peripheral holder (22), and the jet flow (5) is easily measured at a close distance (SL) from the nozzle (1). 2. The jet flow force measuring device according to claim 1, wherein the jet flow force measuring device is capable of performing the above. 前記ジェツト流（５）を流入させる入水路（２４）を前記分散部（２６）の上側に設け、且つ前記入水路（２４）の出口の内径（ＤＰ）を前記分散部上面（２７）より小さな内径で構成し、分散部（２６）の外側のダイアフラム（１６）に誤って斜めにジェット流（５）が射出され、ロードセル（１５）を破壊される事を防止する事を特徴とする請求項１あるいは２記載のジエット流の力測定装置。  A water inlet channel (24) through which the jet stream (5) flows is provided above the dispersion part (26), and an inner diameter (DP) of an outlet of the water inlet channel (24) is smaller than the upper surface of the dispersion part (27). It comprises an inner diameter and prevents the jet flow (5) from being obliquely injected into the diaphragm (16) outside the dispersion part (26) and destroying the load cell (15). 3. A jet flow force measuring device according to 1 or 2.
JP2003287194A 2003-07-01 2003-07-01 Jet force measuring apparatus for needleless syringe Pending JP2005021640A (en)

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