JP2007029669A - Needleless syringe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a conventional needleless syringe which performs injection by spraying a spray flow vertically to a skin tissur from a nozzle at a distal end has difficulty in scattering a chemical to the wide range of a prescribed treatment section at a shallow position from the surface of the skin 20. <P>SOLUTION: A distal end part 11N where a horizontal nozzle 3N for spraying a horizontal spray flow 7N spraying in a nearly horizontal direction is provided on its side face is provided on the distal end side of the needleless syringe. Moreover, a prescribed depth H according to the depth of the treatment section from a reference face 6 positioning the needleless syringe is made to be the arrangement position of the horizontal nozzle 3N. Thus, the distal end part 11N is pushed to the surface of the skin 20 to recess the skin to form a cup-like shape, and the horizontal spray flow 7N is sprayed to the skin tissue through the surface of the recessed skin 20, so that it is possible to scatter the chemical to the wide range of the prescribed treatment section at the shallow position from the surface of the skin 20. <P>COPYRIGHT: (C)2007,JPO&INPIT

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先端ノズル関し、特にノズルより射出される薬液の噴射流が皮膚の浅い治療部位にほぼ水平方向の広い範囲に拡散させる無針注射器に関する。    The present invention relates to a tip nozzle of a needleless syringe used for medical purposes, and more particularly to a needleless syringe that diffuses a jet of a drug solution ejected from a nozzle over a wide range in a substantially horizontal direction at a shallow treatment site on the skin.

図１（従来の構造と注射作用の説明断面図である）に示す皮下組織の図は、皮膚２０と脂肪層２３と筋肉層２４の厚さの縮尺寸法を本発明の説明を判りやすくする為に上側が大きくなるように可変寸法として示してある。    The subcutaneous tissue diagram shown in FIG. 1 (which is a cross-sectional view of the conventional structure and injection action) is intended to make the scale of the skin 20, fat layer 23 and muscle layer 24 scales easier to understand the present invention. Are shown as variable dimensions so that the upper side becomes larger.

また請求項１記載のほぼ水平な方向とは、水平ノズル３Ｎより射出される水平噴射流７Ｎの方向と水平方向との傾きの差の水平差角αが±３０°以下の少ない傾きである方向を言う事にする。更にまた請求項１記載のほぼ平坦とは、平面あるいは先端底部１１Ｔの直径に対し２倍以上の大きなＲ面の平坦に近い面を言う事にする。Further, the substantially horizontal direction according to claim 1 is a direction in which the horizontal difference angle α of the difference between the direction of the horizontal jet flow 7N ejected from the horizontal nozzle 3N and the horizontal direction is a small inclination of ± 30 ° or less. I will say. Furthermore, the term “substantially flat” as used in claim 1 refers to a flat surface or a surface close to the flat surface of a large R surface that is twice or more the diameter of the tip bottom portion 11T.

更に本発明の説明では、水平ノズル３Ｎとはほぼ水平に噴射する１ケあるいは複数ケのノズル（Ａノズル３Ａ、Ｂノズル３Ｂ、Ｃノズル３Ｃ、Ｄノズル３Ｄ、・・・）を言う事にする。同様に水平噴射流７Ｎとは１ケあるいは複数ケの噴射流（Ａ噴射流７Ａ、Ｂ噴射流７Ｂ、Ｃ噴射流７Ｃ、Ｄ噴射流７Ｄ，・・・）を言う事にする。Further, in the description of the present invention, the horizontal nozzle 3N refers to one or a plurality of nozzles (A nozzle 3A, B nozzle 3B, C nozzle 3C, D nozzle 3D,...) That spray substantially horizontally. . Similarly, the horizontal injection flow 7N means one or a plurality of injection flows (A injection flow 7A, B injection flow 7B, C injection flow 7C, D injection flow 7D,...).

また同様に水平注入穴８Ｎとは１ケあるいは複数ケの注入穴（Ａ注入穴８Ａ、Ｂ注入穴８Ｂ、Ｃ注入穴８Ｃ、Ｄ注入穴８Ｄ・・・）を言う事にする。更に同様に水平拡散薬液９Ｎとは１ケあるいは複数ケの拡散薬液（Ａ拡散薬液９Ａ、Ｂ拡散薬液９Ｂ、Ｃ拡散薬液９Ｃ、Ｄ拡散薬液９Ｄ・・・）を言う事にする。Similarly, the horizontal injection hole 8N means one or a plurality of injection holes (A injection hole 8A, B injection hole 8B, C injection hole 8C, D injection hole 8D...). Similarly, the horizontal diffusion chemical 9N means one or a plurality of diffusion chemicals (A diffusion chemical 9A, B diffusion chemical 9B, C diffusion chemical 9C, D diffusion chemical 9D...).

最初に無針注射器の注射に関連する皮下組織の概要と治療部位を図１を用いて説明する。皮下組織は皮膚２０と脂肪層２３と筋肉層２４より構成されている。脂肪層２３は５〜３０ｍｍの厚さで、皮膚２０は０．４〜１．４ｍｍの厚さと言われている。また皮膚２０は真皮２２との表皮２１とより構成されていて、表皮２１の厚さは薄く０．０５〜０．２ｍｍの厚さと言われている。  First, an outline of a subcutaneous tissue and a treatment site related to injection with a needleless syringe will be described with reference to FIG. The subcutaneous tissue is composed of skin 20, fat layer 23, and muscle layer 24. The fat layer 23 is said to be 5 to 30 mm thick, and the skin 20 is said to be 0.4 to 1.4 mm thick. Moreover, the skin 20 is comprised from the epidermis 21 with the dermis 22, and the thickness of the epidermis 21 is said to be thin 0.05-0.2 mm.

次に薬液５を注射する治療部位について説明する。糖尿病用のインスリンは前記脂肪層２３や筋肉層２４に薬液５を拡散するように注射され、ＤＮＡを利用したワクチン類は皮膚２０の表面より浅い位置（例えば真皮２２）に主に拡散するように注射する事が知られている。このように治療部位は薬液５の種類と治療目的に応じて薬の治療効果の高い効率の良い皮下組織の場所が選ばれる。Next, the treatment site where the drug solution 5 is injected will be described. Insulin for diabetes is injected into the fat layer 23 and the muscle layer 24 so that the drug solution 5 is diffused, and vaccines using DNA are mainly diffused to a position shallower than the surface of the skin 20 (for example, the dermis 22). It is known to inject. As described above, the location of the subcutaneous tissue where the therapeutic effect of the drug is high and the efficiency is selected according to the kind of the drug solution 5 and the treatment purpose.

従来の無針注射器は、図１に示すのように、基準面６を有するシリンジ２と駆動部１で構成されていて、前記シリンジ２は薬液５とピストン４とを内装し、その先端には微少な直径の従来ノズル３Ｚが設けらている。また、その先端側には、皮膚２０の表面への押圧で垂直（Ｙ０−Ｙ１）方向へシリンジ２を保持する基準面６と皮膚２０に従来ノズル３Ｚを密着させる為の半球面上の球面先端部１１Ｚが設けられている。As shown in FIG. 1, a conventional needleless syringe is composed of a syringe 2 having a reference surface 6 and a drive unit 1, and the syringe 2 includes a drug solution 5 and a piston 4, and a tip thereof. A conventional nozzle 3Z having a small diameter is provided. Also, on the tip side, a spherical tip on a hemispherical surface for bringing the conventional nozzle 3Z into close contact with the reference surface 6 holding the syringe 2 in the vertical (Y0-Y1) direction by pressing against the surface of the skin 20 and the skin 20 A portion 11Z is provided.

注射の時は、皮膚２０の表面に基準面６を押しつける事で球面先端部１１Ｚも押しつけられ、薬液５は従来ノズル３Ｚを介して高速な噴射流の従来噴射流７Ｚとして射出される。この従来噴射流７Ｚは始め密着した表皮２１に従来注入穴８Ｚを穴あけした後、前記穴を介して皮下組織の内部に垂直方向（Ｙ０−Ｙ１）に沿って噴射注入される。  At the time of injection, the spherical tip 11Z is also pressed by pressing the reference surface 6 against the surface of the skin 20, and the chemical solution 5 is injected through the conventional nozzle 3Z as a conventional injection flow 7Z of a high-speed injection flow. The conventional injection flow 7Z is first injected along the vertical direction (Y0-Y1) into the inside of the subcutaneous tissue through the conventional injection hole 8Z in the close-contacted epidermis 21 through the hole.

寒天を溶かして固めたゲルのような硬さが均質な素材に無針注射器で垂直方向に従来噴射流７Ｚを注入した場合は、薬液５は線香花火のように丸く拡散が行われる。When a conventional jet flow 7Z is injected in a vertical direction with a needleless syringe into a material having a uniform hardness such as gel obtained by melting and hardening agar, the drug solution 5 is diffused round like a sparkler.

しかし皮下組織は、水平な組織層が多く積み重なっているため垂直方向に比較して水平方向の硬度が柔らかいので図１に示すように水平方向に潰れた楕円状に薬液５の拡散が発生する傾向が有る。実際には組織と組織の隙間に拡散する場合があり形状は複雑で有るが、ここでは説明を判りやすくするために楕円で模式化して表現することにする。However, since the subcutaneous tissue has many horizontal tissue layers, the hardness in the horizontal direction is softer than that in the vertical direction. Therefore, as shown in FIG. 1, the diffusion of the drug solution 5 tends to occur in an elliptical shape collapsed in the horizontal direction. There is. Actually, it may diffuse into the gap between tissues, and the shape is complicated. However, in order to make the explanation easy to understand, it will be schematically represented by an ellipse.

次に従来噴射流７Ｚの力と拡散について説明する。垂直に噴射する従来噴射流７Ｚの力が過度に強い（例えば１．２ニュ−トン）場合は薬液５を奥深くまで送り込み、脂肪層２３や筋肉層２４に強拡散薬液９Ｚとして拡散する。また従来噴射流７Ｚの力が中位（例えば０．６ニュ−トン）の場合は薬液５は脂肪層２３に中拡散薬液９Ｖとして拡散する。更にまた従来噴射流７Ｚの力が弱い（例えば０．３ニュ−トン）場合は薬液５は真皮２２の近傍に弱拡散薬液９Ｗとして供給される。Next, the force and diffusion of the conventional jet flow 7Z will be described. When the force of the conventional jet flow 7Z that is injected vertically is excessively strong (for example, 1.2 newtons), the drug solution 5 is sent deeply and diffused into the fat layer 23 and the muscle layer 24 as the strong diffusion drug solution 9Z. Further, when the force of the conventional jet flow 7Z is medium (for example, 0.6 newton), the drug solution 5 diffuses into the fat layer 23 as the medium diffusion drug solution 9V. Furthermore, when the force of the conventional jet flow 7Z is weak (for example, 0.3 newton), the chemical 5 is supplied as a weakly diffused chemical 9W in the vicinity of the dermis 22.

これらの従来の無針注射器の注射作用特性より皮膚２０の浅い位置に薬液５を拡散しようとすると、無針注射器の垂直方向に噴射される従来噴射流７Ｚの力を出来るだけ弱く構成すれば、容易に表皮２１より浅い位置の治療部位に薬液５を拡散出来ると推定される。If the drug solution 5 is to be diffused to a shallower position of the skin 20 than the injection action characteristics of these conventional needleless syringes, the force of the conventional jet flow 7Z injected in the vertical direction of the needleless syringe can be made as weak as possible. It is estimated that the drug solution 5 can be easily diffused to the treatment site shallower than the epidermis 21.

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

皮下組織の浅い位置、例えば真皮２２を治療部位とし場合、従来の無針注射器の技術では従来噴射流７Ｚの力を弱く構成すれば良いと前述したが、その場合は図１の弱拡散薬液９Ｗのようにその拡散の大きさは従来噴射流７Ｚの力が弱いために、低圧力の針式注射器の注射のように小さい範囲に薬液５が塊となった状態で注射され、薬液５を広い範囲にまで拡散する事が出来無い。    In the case where the treatment site is a shallow position of the subcutaneous tissue, for example, the dermis 22 as described above, the conventional needleless syringe technique has been described above that the force of the conventional jet flow 7Z may be weakened. In that case, the weak diffusion drug solution 9W in FIG. In this case, since the force of the jet flow 7Z is weak, the medicinal solution 5 is injected as a lump in a small range like the injection of a low pressure needle type syringe, and the medicinal solution 5 is widened. It cannot spread to the range.

このことは、針式注射器と同様に薬液５が塊となって皮下組織の構造を破壊し圧迫して所謂「水ぶくれ」を発生してしまう。This means that the drug solution 5 becomes a lump and destroys the structure of the subcutaneous tissue and presses it like the needle type syringe, so-called “blister” occurs.

即ちこのことは、皮下組織のダメージ少なく痛みの少ない注射が出来る無針注射器のメリットが全く無くなってしまう事になる。In other words, this eliminates the merit of the needleless syringe that can inject the subcutaneous tissue with less damage and less pain.

更に従来噴射流７Ｚの力を弱くすると表皮２１の注入穴８Ｚが、切れないドリルで穴あけするように、従来注入穴８Ｚの内径が従来ノズル３Ｚの直径よりも大きくなり皮膚２０のダメージが増加する傾向がある。更に過度に弱くするとその従来注入穴８Ｚの穴あけが出来なくなり、薬液５が皮膚２０の表面にあふれ出て注射が出来なくなることになる。Further, when the force of the conventional jet flow 7Z is weakened, the inner diameter of the conventional injection hole 8Z is larger than the diameter of the conventional nozzle 3Z so that the injection hole 8Z of the epidermis 21 is drilled with a non-breakable drill, and the damage to the skin 20 increases. Tend. If it is further weakened, the conventional injection hole 8Z cannot be formed, and the drug solution 5 overflows the surface of the skin 20 and cannot be injected.

よってワクチン注射のような皮膚２０の表面から浅い位置の治療部位に広範囲に薬液５を拡散させ、皮膚２０のダメージ少なく痛みの少ない無針注射器のメリットを生かした無針注射器を提供することが課題である。Therefore, it is an object to provide a needleless syringe that diffuses the drug solution 5 over a wide area from the surface of the skin 20 to a treatment site shallow as in the case of vaccine injection and takes advantage of the needleless syringe with less damage to the skin 20 and less pain. It is.

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

前記の目的を達成するために、本発明は、請求項１に記載したように、ほぼ水平方向に噴射する水平噴射流７Ｎを射出する水平ノズル３Ｎを側面に設けた筒状の先端筒部１１Ｗと、ほぼ平坦な底板状の先端底部１１Ｔとを設けた先端部１１Ｎを無針注射器の先端側に設け、前記先端部１１Ｎを皮膚２０の表面に押しつけてカップ状に凹まし、前記の凹んだ皮膚２０の表面より水平ノズル３Ｎからの水平噴射流７Ｎを噴射するように構成する。  In order to achieve the above object, according to the present invention, as described in claim 1, the cylindrical tip end cylinder portion 11 </ b> W having a horizontal nozzle 3 </ b> N for injecting a horizontal injection flow 7 </ b> N for injecting in a substantially horizontal direction is provided on the side surface. And a tip portion 11N provided with a substantially flat bottom plate-like tip bottom portion 11T is provided on the tip side of the needleless syringe, and the tip portion 11N is pressed against the surface of the skin 20 to be recessed into a cup shape. A horizontal jet flow 7N from the horizontal nozzle 3N is ejected from the surface of the skin 20.

このように構成するので表皮２１の表面に基準面６と先端部１１Ｎを押しつけて注射すると、先端部１１Ｎの押圧でカップ状に凹んだ皮膚２０の表面から所定の治療部位に向けて、水平ノズル３Ｎよりほぼ水平方向に水平噴射流７Ｎを噴射でき、治療部位に薬液５を拡散できる。With this configuration, when the reference surface 6 and the distal end portion 11N are pressed against the surface of the epidermis 21 and injected, the horizontal nozzle is directed from the surface of the skin 20 that is recessed in a cup shape by the pressing of the distal end portion 11N toward a predetermined treatment site. The horizontal jet flow 7N can be injected in a substantially horizontal direction from 3N, and the drug solution 5 can be diffused to the treatment site.

また先端筒部１１Ｗにある水平ノズル３Ｎの配設位置を、無針注射器の位置決する基準面６より治療部位の深さに応じた所定深さＨとして構成するので、薬液５を皮膚２０の表面から浅い位置にある治療部位を「ねらい撃ち」したように水平に広い範囲で拡散させる事ができる。In addition, the horizontal nozzle 3N disposed at the distal end cylindrical portion 11W is disposed at a predetermined depth H according to the depth of the treatment site from the reference surface 6 for positioning the needleless syringe. It is possible to spread the treatment site in a shallow range horizontally as if it were “shot”.

更に本発明の無針注射器は浅い治療部位でも、このように薬液５の拡散ができるので皮下組織のダメージも少く痛みの少ない注射を可能としている。Furthermore, since the needleless syringe of the present invention can diffuse the medicinal solution 5 in this way even at a shallow treatment site, the subcutaneous tissue is less damaged and less painful.

以下、図２〜７の図面を用いて実施例により本発明を詳細に説明する。更に説明の簡素化の為に、各図の共通する部分の付番は同じ付番として実施例毎の説明は省略し、異なる新たな部分についてのみ説明することにする。Hereinafter, the present invention will be described in detail with reference to the drawings of FIGS. Further, for simplification of explanation, the numbering of the common parts in each drawing is the same numbering, the explanation for each embodiment is omitted, and only different new parts will be explained.

図２は本発明の第１の実施例の構造と注射作用との説明断面図、図３は本発明の第２の実施例の構造と注射作用説明断面図、図４は本発明の第２の実施例の薬液拡散作用の３次元説明図、図５は本発明の第３の実施例の先端構造説明断面図、図６は本発明の第４の実施例の水平差角作用の説明断面、図７は本発明の第５の実施例の可変基準面の構造説明断面図である。FIG. 2 is a sectional view for explaining the structure and injection action of the first embodiment of the present invention, FIG. 3 is a sectional view for explaining the structure and injection action of the second embodiment of the present invention, and FIG. FIG. 5 is a sectional view for explaining the tip structure of the third embodiment of the present invention, and FIG. 6 is a sectional view for explaining the horizontal differential angle action of the fourth embodiment of the present invention. FIG. 7 is a sectional view for explaining the structure of the variable reference plane according to the fifth embodiment of the present invention.

（第１の実施例）
図２を用いて第１の実施例を説明する。本発明の無針注射器は、請求項１に記載したように、ほぼ水平方向に噴射する水平噴射流７Ｎを射出する水平ノズル３Ｎを側面に設けた筒状の先端筒部１１Ｗと、ほぼ平坦な底板状の先端底部１１Ｔとを設けた先端部１１Ｎを無針注射器の先端側に設けて無針注射器を構成する。(First embodiment)
A first embodiment will be described with reference to FIG. The needleless syringe according to the present invention includes, as described in claim 1, a cylindrical tip cylinder portion 11W provided with a horizontal nozzle 3N for injecting a horizontal injection flow 7N that is injected in a substantially horizontal direction on a side surface, and a substantially flat surface. A tip portion 11N provided with a bottom plate-like tip bottom portion 11T is provided on the tip side of the needleless syringe to constitute a needleless syringe.

このように構成するので前記先端部１１Ｎを皮膚２０の表面に押しつけてカップ状に凹まし、前記の凹んだ皮膚２０の表面を介して皮下組織に水平ノズル３Ｎからの水平噴射流７Ｎを噴射して、皮膚２０の表面から浅い位置にある治療部位に薬液５を広い範囲で拡散させる事が出来る。With this configuration, the tip 11N is pressed against the surface of the skin 20 to be recessed in a cup shape, and the horizontal jet flow 7N from the horizontal nozzle 3N is sprayed to the subcutaneous tissue through the surface of the recessed skin 20. Thus, the medicinal solution 5 can be diffused over a wide range from the surface of the skin 20 to the treatment site at a shallow position.

また先端筒部１１Ｗにある水平ノズル３Ｎの配設位置は、無針注射器の位置決する基準面６より治療部位の深さに応じた所定深さＨとして無針注射器を構成するので、薬液５を皮膚２０の表面から浅い位置にある治療部位を「ねらい撃ち」したように水平方向の広い範囲に拡散させる事ができる。Further, the horizontal nozzle 3N in the distal end cylindrical portion 11W is disposed at a predetermined depth H corresponding to the depth of the treatment site from the reference surface 6 where the needleless syringe is positioned. The treatment site located at a shallow position from the surface of the skin 20 can be diffused over a wide horizontal range as if it were “aimed”.

例えば図２のように治療部位を真皮２２としたいときは、所定深さＨを真皮２２の中央の深さに設定する。よって治療部位を「ねらい撃ち」したように水平に水平噴射流７Ｎが噴射されて、薬液５の拡散が水平拡散薬液９Ｎのように真皮２２の中央の深さに広い範囲で水平方向に拡散できる。For example, when the treatment site is to be the dermis 22 as shown in FIG. 2, the predetermined depth H is set to the center depth of the dermis 22. Accordingly, the horizontal injection flow 7N is injected horizontally as if the treatment site was “aimed”, and the diffusion of the drug solution 5 can be diffused in the horizontal direction over a wide range at the center depth of the dermis 22 like the horizontal diffusion drug solution 9N.

次に水平噴射流７Ｎの力の強弱の作用を説明する。従来は拡散の位置が垂直方向の異なる治療部位（真皮２２から脂肪層２３そして筋肉層２４）へと従来噴射流７Ｚの力により変化したが、実施例１の無針注射器では強くしても筋肉層２４に達するような事もなく目的とする治療部位の中で水平方向の位置が変化するだけである。Next, the effect of the strength of the horizontal jet flow 7N will be described. Conventionally, the position of diffusion has been changed from the dermis 22 to the treatment site in the vertical direction (from the dermis 22 to the fat layer 23 and the muscle layer 24) by the force of the conventional jet flow 7Z. Without reaching the layer 24, the horizontal position only changes within the intended treatment site.

よって水平噴射流７Ｎの力の強弱は任意の値が選べる。よって従来例のように過度に弱くする必要がないので、表皮２１に穴あけする水平注入穴８Ｎは小さく出来、皮膚２０のダメージを少なく出来る。Therefore, any value can be selected for the strength of the horizontal jet flow 7N. Therefore, since it is not necessary to make it too weak unlike the conventional example, the horizontal injection hole 8N drilled in the epidermis 21 can be made small, and the damage to the skin 20 can be reduced.

更に治療部位が浅い位置でも、水平噴射流７Ｎの力を過度に弱くする必要がないので、針式注射器のような薬液５が塊になる「水ぶくれ」も無く、注射した薬液５は確実に広い範囲に拡散出来るので、皮下組織のダメージ少なく痛みも少ない注射が出来る。Furthermore, even when the treatment site is shallow, there is no need to excessively weaken the force of the horizontal jet flow 7N, so there is no “blister” of the drug solution 5 like a needle type syringe, and the injected drug solution 5 is surely wide. Because it can diffuse into the area, injection can be done with less damage to the subcutaneous tissue and less pain.

次に所定深さＨについて説明する。原理的には所定深さＨを大きくすれば、深い位置の治療部位でも狙う事が出来るが、先端底部１１Ｔで表皮２１を深い位置（脂肪層２３に応じた深さ）まで凹ますには強い力が必要であり、その押圧操作だけで注射をしないのに、痛みを強く感じるようになる。従って所定深さＨは真皮２２近傍にとどめた方が良い。（例えば所定深さＨ＜３ｍｍに選ぶ事を薦める）Next, the predetermined depth H will be described. In principle, if the predetermined depth H is increased, it is possible to aim even at a deep treatment site, but it is strong to dent the epidermis 21 to a deep position (depth corresponding to the fat layer 23) at the tip bottom 11T. Although force is required and the injection is not performed only by the pressing operation, the pain is felt strongly. Therefore, it is better to keep the predetermined depth H near the dermis 22. (For example, it is recommended to select a predetermined depth H <3 mm)

図２の制御部１７について補足説明する。シリンジ２内の薬液５は押圧されて先端部１１Ｎの内部に流れ込むが、先端部１１Ｎに設けた制御部１７の内壁の斜面により流れの方向は水平方向に誘導され、また連続的に絞られるのて流速が増加した流れが水平ノズル３Ｎに集中する。従って薬液５は水平ノズル３Ｎより水平噴射流７Ｎとして水平方向に勢いよく噴射できる。A supplementary description will be given of the control unit 17 in FIG. The chemical solution 5 in the syringe 2 is pressed and flows into the tip portion 11N, but the flow direction is guided in the horizontal direction by the slope of the inner wall of the control unit 17 provided at the tip portion 11N and is continuously throttled. Thus, the flow with the increased flow velocity is concentrated on the horizontal nozzle 3N. Accordingly, the chemical liquid 5 can be ejected vigorously in the horizontal direction as a horizontal ejection flow 7N from the horizontal nozzle 3N.

（第２の実施例）
次に図３を用いて第２の実施例を説明する。基本的には前述の第１の実施例と同様な構造で構成する。ここでは異なる新たな部分について説明する。(Second embodiment)
Next, a second embodiment will be described with reference to FIG. Basically, it has the same structure as that of the first embodiment. Here, different new parts will be described.

先端部１１Ｎの先端筒部１１Ｗに放射状に等角度で配分した複数の水平ノズル３Ｎ（Ａノズル３Ａ、Ｂノズル３Ｂ、Ｃノズル３Ｃ、Ｄノズル３Ｄの４ケ）を設ける。ここでは４ケの前記ノズルで説明するが、前記ノズルの数は任意の複数の数を選択して放射状に等角度で配分しても良い。A plurality of horizontal nozzles 3N (four nozzles of A nozzle 3A, B nozzle 3B, C nozzle 3C, and D nozzle 3D) distributed radially at an equal angle are provided on the distal end cylindrical portion 11W of the distal end portion 11N. Here, four nozzles will be described, but any number of the nozzles may be selected and distributed radially at equal angles.

また、先端部１１Ｎの内部には円錐状の制御部１７を設け、上からの流れを連続的に絞り流速を上げるとともに、円錐面での反射により水平方向の流れを作り水平ノズル３Ｎに集中して供給する。In addition, a conical control unit 17 is provided inside the tip end portion 11N, and the flow from above is continuously throttled to increase the flow velocity, and a horizontal flow is created by reflection at the conical surface and concentrated on the horizontal nozzle 3N. And supply.

このように構成したので、水平ノズル３Ｎより水平方向に複数の噴射流（Ａ噴射流７Ａ、Ｂ噴射流７Ｂ、Ｃ噴射流７Ｃ、Ｄ噴射流７Ｄ）が周囲の四方に向けて噴射される。Since it comprised in this way, several injection flow (A injection flow 7A, B injection flow 7B, C injection flow 7C, D injection flow 7D) is injected toward the surrounding four directions from the horizontal nozzle 3N in the horizontal direction.

従って押圧によりカップ状に凹んだ表皮２１には複数の注入穴（Ａ注入穴８Ａ、Ｂ注入穴８Ｂ、Ｃ注入穴８Ｃ、Ｄ注入穴８Ｄ）が穴あけされる。Therefore, a plurality of injection holes (A injection hole 8A, B injection hole 8B, C injection hole 8C, D injection hole 8D) are formed in the skin 21 that is recessed in a cup shape by pressing.

このように構成されるので、前記の穴を通して水平噴射流７Ｎが水平方向に噴射し、所定深さＨの位置で周囲の治療部位に複数の水平拡散薬液９Ｎ（Ａ拡散薬液９Ａ、Ｂ拡散薬液９Ｂ、Ｃ拡散薬液９Ｃ、Ｄ拡散薬液９Ｄ）が拡散できる。Since it is configured in this manner, the horizontal jet flow 7N is jetted in the horizontal direction through the holes, and a plurality of horizontal diffusion chemicals 9N (A diffusion chemicals 9A and B diffusion chemicals are applied to the surrounding treatment site at a predetermined depth H. 9B, C diffusion chemical liquid 9C, D diffusion chemical liquid 9D) can diffuse.

次に注射が終了して先端部１１Ｎを皮膚２０から外すと、表皮２１の表面は図４に示すように平坦に戻る。平坦に戻ったときの表皮２１の表面には垂直方向から穴あけしたような複数の水平注入穴８Ｎが放射状の等角度で配設されている事になる。Next, when the injection is completed and the distal end portion 11N is removed from the skin 20, the surface of the epidermis 21 returns to flat as shown in FIG. When the surface returns to the flat surface, a plurality of horizontal injection holes 8N, which are drilled from the vertical direction, are arranged at equal angles in the radial direction on the surface of the skin 21.

また水平注入穴８Ｎを通過して注入され水平噴射流７Ｎの拡散は、表面から真皮２２の中に進むにしたがって周囲に向かって傾斜し始め、真皮２２の内部（所定深さＨ）では周囲の放射状の離れた位置に複数の水平拡散薬液９Ｎが水平に拡散される事になる。Further, the diffusion of the horizontal injection flow 7N injected through the horizontal injection hole 8N begins to incline toward the periphery as it advances from the surface into the dermis 22, and within the dermis 22 (predetermined depth H) A plurality of horizontal diffusion chemicals 9N are diffused horizontally in radially spaced positions.

このように作用するので第２の実施例の無針注射器は、治療部位の内部で水平方向に、しかも広範囲に水平拡散薬液９Ｎが得られる。従って真皮２２など皮膚２０の表面より浅い位置の治療部位に注射する無針注射器（ダメージが少く痛み少ない特徴のある）としては最適で有る。Since it acts in this way, the needleless syringe of the second embodiment can obtain the horizontal diffusion drug solution 9N in the horizontal direction and in a wide range inside the treatment site. Therefore, it is optimal as a needleless syringe (having a feature of less damage and less pain) that is injected into a treatment site shallower than the surface of the skin 20 such as the dermis 22.

更に水平噴射流７Ｎが複数であるので第１の実施例よりも短時間で注射が可能である。また噴射方向が硬度の柔らかい水平方向であるので弱い力でも広い範囲に拡散できる。Furthermore, since there are a plurality of horizontal jet streams 7N, injection can be performed in a shorter time than in the first embodiment. Moreover, since the injection direction is a horizontal direction with a soft hardness, even a weak force can be diffused over a wide range.

（第３の実施例）
次に図５を用いて第３の実施例を説明する。（異なる新しい部分を説明する。）(Third embodiment)
Next, a third embodiment will be described with reference to FIG. (Explain different new parts.)

前述の実施例ではシリンジ２の外径より太い径の板状のフランジの下面を基準面６として説明してきた。第３の実施例は、シリンジ２の外径が大きい場合にはシリンジ２の下面をそのまま基準面６として構成できる。In the above-described embodiment, the lower surface of the plate-like flange having a diameter larger than the outer diameter of the syringe 2 has been described as the reference surface 6. In the third embodiment, when the outer diameter of the syringe 2 is large, the lower surface of the syringe 2 can be configured as the reference surface 6 as it is.

例へばシリンジ２の外径がφ１４の場合は下面で表皮２１を支えられるので、基準面６とする事が出来る。但し先端底部１１Ｔによって押された部分の皮膚２０のみを凹ます事が出来るように先端底部１１Ｔの直径は基準面６の１／２以下のφ５とする。For example, when the outer diameter of the syringe 2 is φ14, the skin 21 can be supported by the lower surface, so that the reference surface 6 can be obtained. However, the diameter of the tip bottom portion 11T is set to φ5 which is 1/2 or less of the reference surface 6 so that only the skin 20 of the portion pressed by the tip bottom portion 11T can be recessed.

また先端底部１１Ｔの直径はあまり細くすると針式注射器と同様に皮膚２０に刺さってしまい皮下組織にダメージを与えてしまうので好ましくない。ここでは前記のようにφ５としているので刺さる事がない。Further, if the diameter of the tip bottom portion 11T is made too thin, it is not preferable because it will pierce the skin 20 and damage the subcutaneous tissue as in the case of the needle type syringe. Here, since it is set to φ5 as described above, it is not stabbed.

また先端底部１１Ｔの形状は刺さりにくいようにほぼ平坦な形状が良い。第３の実施例では先端底部１１Ｔの直径（φ５）の２倍のＲ面、即ちＲ１０としてほぼ平坦にして居るので皮膚２０に刺さることは無い。Moreover, the shape of the tip bottom portion 11T is preferably a substantially flat shape so that it is difficult to stick. In the third embodiment, the skin 20 is not stabbed because it is almost flat as the R surface twice the diameter (φ5) of the tip bottom 11T, that is, R10.

（第４の実施例）
次に先端筒部１１Ｗと先端底部１１Ｔの形状を非円形とした第４の実施例につい図５を用いて説明する。(Fourth embodiment)
Next, a fourth embodiment in which the shapes of the tip cylinder portion 11W and the tip bottom portion 11T are non-circular will be described with reference to FIG.

複数の水平ノズル３Ｎがある先端筒部１１Ｗの壁面外周を半円形形状の複数の凸壁面１４で構成する。また図５のＸ０−Ｘ１断面図のように凸壁面の直径の大きな先端に水平ノズル３Ｎを設ける。The outer periphery of the wall surface of the distal end cylindrical portion 11W having the plurality of horizontal nozzles 3N is configured by a plurality of semicircular convex wall surfaces 14. Further, as shown in the X0-X1 sectional view of FIG. 5, a horizontal nozzle 3N is provided at the tip of the convex wall having a large diameter.

このように構成するので、押圧して凹んだ表皮２１と複数の水平ノズル３Ｎとの密着度を向上させることが出来、注射の損失を少なく出来る。Since it comprises in this way, the adhesiveness of the skin 21 and the horizontal nozzle 3N which were depressed by pressing can be improved, and the loss of injection can be decreased.

また水平ノズル３Ｎのある先端筒部１１Ｗの壁面内周は内径が大とし、水平ノズル３Ｎの間の内径は小となるように非円形状で非円形内壁１６を先端筒部１１Ｗに構成する。Further, the inner surface of the wall of the tip cylindrical portion 11W with the horizontal nozzle 3N has a large inner diameter, and the non-circular inner wall 16 is formed in the tip cylindrical portion 11W so that the inner diameter between the horizontal nozzles 3N is small.

また先端底部１１Ｔには円錐状の制御部１７を設ける。従って前記制御部１７と内径変化している凹凸の前記非円形内壁１６との間で、内部の流れを複数の水平ノズル３Ｎへ集中誘導できる。Further, a conical control unit 17 is provided at the tip bottom portion 11T. Therefore, the internal flow can be concentratedly guided to the plurality of horizontal nozzles 3N between the control unit 17 and the non-circular inner wall 16 with the unevenness changing in inner diameter.

即ち、流れの入り口側（Ｘ２−Ｘ３断面図参照）では、流路の断面積は、ほとんど非円形内壁１６の凹凸だけであるが、複数の水平ノズル３Ｎの付近（Ｘ０−Ｘ１断面図参照）の流れは制御部１７の大きくなった外径と非円形内壁１６の内径の狭い部分では遮られ、非円形内壁１６の内径の大きな部分では絞られた流路を作る事ができる。That is, on the flow inlet side (refer to the X2-X3 cross-sectional view), the cross-sectional area of the flow path is almost only the unevenness of the non-circular inner wall 16, but in the vicinity of the plurality of horizontal nozzles 3N (refer to the X0-X1 cross-sectional view). This flow is blocked at a portion where the outer diameter of the control portion 17 is increased and the inner diameter of the non-circular inner wall 16 is narrow, and a narrowed flow path can be formed at a portion where the inner diameter of the non-circular inner wall 16 is large.

従って前記の絞られた流賂に集中誘導された流れは、水平方向に向かって設けた水平ノズル３Ｎに高速流を与える事になり、水平方向に強い力の水平噴射流７Ｎを発生させる事ができる。よつて、このように構成するので先端部１１Ｎのみの改良で、浅い位置にある治療部位に適した無針注射器を容易に提供できる。Accordingly, the flow intensively guided by the narrowed flow gives a high-speed flow to the horizontal nozzle 3N provided in the horizontal direction, and can generate a horizontal jet flow 7N having a strong force in the horizontal direction. it can. Therefore, since it comprises in this way, the needleless syringe suitable for the treatment site | part in a shallow position can be easily provided by improvement of only the front-end | tip part 11N.

（第４の実施例）
次に水平噴射流７Ｎが水平よりわずか傾斜した例を第４の実施例として図６を用いて説明する。(Fourth embodiment)
Next, an example in which the horizontal jet flow 7N is slightly inclined from the horizontal will be described as a fourth embodiment with reference to FIG.

いま水平噴射流７Ｎが水平より傾斜している角度を水平差角αと言うことにする。この水平差角αが大きすぎると、水平噴射流７Ｎが傾斜して進む為に離れた所では水平拡散薬液９Ｎが所定深さＨより異なる深さの傾斜深さＨａになり狙った治療部位の中央に水平拡散薬液９Ｎを拡散させる事が出来なくなる。The angle at which the horizontal jet flow 7N is inclined from the horizontal is now called the horizontal difference angle α. If the horizontal difference angle α is too large, the horizontal diffusing chemical solution 9N becomes an inclined depth Ha having a depth different from the predetermined depth H at a location away from the horizontal jet stream 7N so that the horizontal jet flow 7N advances with an inclination. The horizontal diffusion chemical 9N cannot be diffused in the center.

よって、この水平差角αはほぼ水平の範囲の±３０°以下に設定する。図６は水平差角αを−１５°とし真皮２２の下方の治療部位を斜め上側より狙った例を図６で示している。 図示は省略するが、水平差角αを＋１５°として、所定深さＨより斜め上に水平噴射流７Ｎを噴射して下側から表皮２１の裏側（真皮２２の上側）の治療部位をを狙うことも出来る。Therefore, the horizontal difference angle α is set to ± 30 ° or less of a substantially horizontal range. FIG. 6 shows an example in which the horizontal difference angle α is −15 ° and the treatment site below the dermis 22 is aimed obliquely from above. Although illustration is omitted, the horizontal difference angle α is set to + 15 °, and the horizontal jet flow 7N is injected obliquely above the predetermined depth H to aim at the treatment site on the back side of the epidermis 21 (upper side of the dermis 22) from below. You can also

しかし所定深さＨで治療部位の中央に水平拡散薬液９Ｎを作るように狙い打ちをするためには、噴射流の到達距離に応じたズレに関係する水平差角αは出来るだけ少ない方が良い。However, in order to aim at making the horizontal diffusion drug solution 9N at the center of the treatment site at the predetermined depth H, it is better that the horizontal difference angle α related to the deviation according to the arrival distance of the jet flow is as small as possible.

（第５の実施例）
次に第５の実施例として可変基準面について図７を用いて説明する。(Fifth embodiment)
Next, a variable reference plane will be described as a fifth embodiment with reference to FIG.

第１・２・３・４の実施例では基準面６と水平ノズル３Ｎの位置が所定深さＨに固定されていた。第５の実施例は基準面６を有するドーナツ状の可変基準面リング１３を設け、シリンジ２の外周とネジで上下に可動可能に構成する。In the first, second, third and fourth embodiments, the positions of the reference surface 6 and the horizontal nozzle 3N are fixed to a predetermined depth H. In the fifth embodiment, a donut-shaped variable reference surface ring 13 having a reference surface 6 is provided, and is configured to be movable up and down by the outer periphery of the syringe 2 and a screw.

このように構成するので可変基準面リング１３を上下に移動して任意深さＨｎを設定できるので、水平噴射流７Ｎを水平に噴射して水平拡散薬液９Ｎを任意の深さの治療部位の中央に拡散する事が容易となる。With this configuration, the variable reference plane ring 13 can be moved up and down to set the arbitrary depth Hn. Therefore, the horizontal jet flow 7N is sprayed horizontally, and the horizontal diffusion drug solution 9N is centered at the treatment site at an arbitrary depth. It becomes easy to diffuse.

前記の任意深さＨｎは、第１の実施例で説明した所定深さＨと同様に過度に深い値は好ましくない。例えば第５の実施例では０．０５ｍｍ〜３ｍｍを任意深さＨｎとしているので皮膚２０の範囲の治療部位に痛みを伴わずに注射する事ができる。The arbitrary depth Hn is not preferably an excessively deep value like the predetermined depth H described in the first embodiment. For example, in the fifth embodiment, 0.05 mm to 3 mm is set to an arbitrary depth Hn, so that it is possible to inject the treatment site in the range of the skin 20 without pain.

図７では可変基準面リング１３をねじで可変するように説明したが、数種類の厚さのドーナツ状の補助リングを設け、前記補助リングを選択して固定した基準面６の下面に取り付けて任意深さＨｎに合わせても良い。例えば図５の第３の実施例で所定深さＨを３ｍｍで作った場合は、厚さ２ｍｍの補助リングを基準面６の下に取り付けて前記補助リングの下面を基準位置として皮膚２０に押しつければ任意深さＨｎを１ｍｍとして対応出来る。（図面省略）In FIG. 7, the variable reference surface ring 13 has been described as being variable with a screw. However, a donut-shaped auxiliary ring having several thicknesses is provided, and the auxiliary ring is selected and fixed to the lower surface of the reference surface 6 which is fixed. It may be adjusted to the depth Hn. For example, when the predetermined depth H is 3 mm in the third embodiment of FIG. 5, an auxiliary ring having a thickness of 2 mm is attached below the reference surface 6 and pressed against the skin 20 with the lower surface of the auxiliary ring as the reference position. Thus, the arbitrary depth Hn can be set to 1 mm. (Drawing omitted)

本発明は趣旨を逸脱しない範囲で色々と展開出来ることは言うまでもない。例えば表皮２１のダメージを少なくするために水平ノズル１１Ｎの直径をφ０．１以下として先端部１１Ｎに水平ノズル３Ｎを１８ヶを配設して、真皮２２の水平方向に互いの拡散が重なった太陽のコロナ状に水平拡散薬液９Ｎを拡散しても良い。（図示省略）It goes without saying that the present invention can be developed in various ways without departing from the spirit of the present invention. For example, in order to reduce the damage to the epidermis 21, the diameter of the horizontal nozzle 11N is φ0.1 or less, and 18 horizontal nozzles 3N are arranged at the tip 11N, and the dermis 22 is diffused in the horizontal direction. The horizontal diffusion chemical 9N may be diffused in a corona shape. (Not shown)

発明の効果The invention's effect

本発明の無針注射器は上記のように構成されているので以下の効果がある。Since the needleless syringe of the present invention is configured as described above, it has the following effects.

複数ノズルを用いた場合は、注射量が多い場合でも短時間に注射する事ができる。また拡散薬液が放射状に水平方向に拡散できるので、真皮など薄い治療部位の内部で水平方向の広い範囲に薬液を拡散させる事が出来る。When a plurality of nozzles are used, injection can be performed in a short time even when the injection amount is large. In addition, since the diffusing drug solution can be diffused radially in the horizontal direction, the drug solution can be diffused in a wide horizontal range within a thin treatment site such as the dermis.

本発明の無針注射器はノズルの数に無関係に以下の効果がある。The needleless syringe of the present invention has the following effects regardless of the number of nozzles.

凹んだ表皮から所定深さにほぼ水平に噴射流が与えられるので、所定の深さを選ぶことにより、容易に浅い位置にある治療部位への薬液拡散の「ねらい撃ち」が容易である。Since the jet flow is given almost horizontally to the predetermined depth from the recessed epidermis, the “target shoot” of the drug solution diffusion to the treatment site at a shallow position can be easily performed by selecting the predetermined depth.

更に皮下組織は水平方向の硬さが柔らかいので、ほぼ水平に噴射流を与える本発明の無針注射器は、表皮を通過した噴射薬液を容易に広い範囲に拡散できる。（従来は、皮下組織の硬い方向の垂直方向に噴射流を与えていた。）Furthermore, since the subcutaneous tissue is soft in the horizontal direction, the needleless syringe of the present invention that gives a jet flow substantially horizontally can easily spread the propellant solution that has passed through the epidermis over a wide range. (Conventionally, jet flow was applied in the direction perpendicular to the hard direction of the subcutaneous tissue.)

従来は噴射流の力を強くすると筋肉にまで達するなど、治療部位と異なる不必要な場所に拡散する事が有ったが、噴射流がほぼ水平に与えられるので、噴射流の強さは「ねらい撃ち」した治療部位の内部での水平拡散の大きを変化させるだけである。従って水平方向の治療部位での薬液拡散の大きさを噴射流の力で任意に制御できる。In the past, when the force of the jet flow was increased, it reached the muscles and diffused to unnecessary places different from the treatment site, but since the jet flow is given almost horizontally, the strength of the jet flow is `` It only changes the amount of horizontal diffusion within the treatment site that was “shot”. Therefore, the magnitude of the chemical solution diffusion at the treatment site in the horizontal direction can be arbitrarily controlled by the force of the jet flow.

噴射流の力を任意に強く出来るので注入穴の穴あけが容易となり、ノズルの直径とほぼ同じ小さな直径で注入穴をあけることも出来、皮膚のダメージを少なく、痛みの少ない注射が出来る。Since the force of the jet flow can be increased arbitrarily, the injection hole can be easily drilled, and the injection hole can be formed with a diameter that is almost the same as the diameter of the nozzle, so that the skin can be injected with less damage and less pain.

治療部位に薬液を拡散して与える事が容易なので、「水ぶくれ」のように皮下組織の構造を損なうような現象がないので、皮膚のダメージ少なく痛みの少ない注射が出来る。Since it is easy to diffuse and give the drug solution to the treatment site, there is no phenomenon that damages the structure of the subcutaneous tissue like “blister”, so that the injection can be performed with little skin damage and less pain.

無針注射器の先端部だけの簡単な構造で目的を達しうるので、本体側（駆動部など）に手を付けずに浅い位置の治療部位用の無針注射器を容易に製作できる。Since the objective can be achieved with a simple structure of only the tip of the needleless syringe, a needleless syringe for a treatment site at a shallow position can be easily manufactured without touching the main body side (driving unit or the like).

あらかじめワクチンなどを充填した無針注射器を１回の使用で駆動本体ごと廃棄する所謂プレフィールド無針注射器にも、目的を達しうる構造が簡単であるので容易に、しかも廉価に、適用で出来る。A so-called pre-field needleless syringe that discards a needleless syringe filled with a vaccine or the like in advance with a single use can be applied easily and inexpensively because the structure that can achieve the purpose is simple.

本発明は簡単な構造で以上のような効果があるので、表皮から浅い位置にある治療部位への注射（ワクチン注射など）を可能とし、無針注射器のメリットを最大限に発揮した優れた無針注射器を提供できる。Since the present invention has the above-mentioned effects with a simple structure, it can be injected into a treatment site shallow from the epidermis (such as a vaccine injection), and it has an excellent performance that maximizes the merit of a needleless syringe. A needle syringe can be provided.

従来の構造と注射作用との説明断面図である。It is explanatory sectional drawing of the conventional structure and injection effect | action. 本発明の第１の実施例の構造と注射作用との説明断面図である。It is explanatory drawing sectional drawing of the structure and injection effect | action of 1st Example of this invention. 本発明の第２の実施例の構造と注射作用説明断面図である。It is a structure and injection effect | action description sectional drawing of the 2nd Example of this invention. 本発明の第２の実施例の薬液拡散作用の３次元説明図である。It is a three-dimensional explanatory drawing of the chemical | medical solution diffusion effect | action of 2nd Example of this invention. 本発明の第３の実施例の先端構造説明断面図である。It is a front end structure explanation sectional view of the 3rd example of the present invention. 本発明の第４の実施例の水平差角作用の説明断面図である。It is explanatory sectional drawing of the horizontal difference angle effect | action of the 4th Example of this invention. 本発明の第５の実施例の可変基準面の構造説明断面図である。It is structure explanatory sectional drawing of the variable reference plane of the 5th Example of this invention.

符号の説明Explanation of symbols

１ 駆動部
２ シリンジ
３Ａ Ａノズル
３Ｂ Ｂノズル
３Ｃ Ｃノズル
３Ｄ Ｄノズル
３Ｎ 水平ノズル
３Ｚ 従来ノズル
４ ピストン
５ 薬液
６ 基準面
７Ａ Ａ噴射流
７Ｂ Ｂ噴射流
７Ｃ Ｃ噴射流
７Ｄ Ｄ噴射流
７Ｎ 水平噴射流
７Ｚ 従来噴射流
８Ａ Ａ注入穴
８Ｂ Ｂ注入穴
８Ｃ Ｃ注入穴
８Ｄ Ｄ注入穴
８Ｎ 水平注入穴
８Ｚ 従来注入穴
９Ａ Ａ拡散薬液
９Ｂ Ｂ拡散薬液
９Ｃ Ｃ拡散薬液
９Ｄ Ｄ拡散薬液
９Ｎ 水平拡散薬液
９Ｗ 弱拡散薬液
９Ｖ 中拡散薬液
９Ｚ 強拡散薬液
１１Ｔ 先端底部
１１Ｗ 先端筒部
１１Ｚ 球面先端部
１１Ｎ 先端部
１３ 可変基準面リング
１４ 凸壁面
１６ 非円形内壁
１７ 制御部
２０ 皮膚
２１ 表皮
２２ 真皮
２３ 脂肪層
２４ 筋肉層
Ｈ 所定深さ
Ｈｎ 任意深さ
Ｈａ 傾斜深さ
Ｘ０−Ｘ１ 水平方向 （Ｘ０−Ｘ１断面）
Ｘ２−Ｘ３ （Ｘ２−Ｘ３断面）
Ｙ０−Ｙ１ 垂直方向
α 水平差角DESCRIPTION OF SYMBOLS 1 Drive part 2 Syringe 3A A nozzle 3B B nozzle 3C C nozzle 3D D nozzle 3N Horizontal nozzle 3Z Conventional nozzle 4 Piston 5 Chemical liquid 6 Reference surface 7A A injection flow 7B B injection flow 7C C injection flow 7D D injection flow 7N Horizontal injection flow 7Z Conventional injection flow 8A A injection hole 8B B injection hole 8C C injection hole 8D D injection hole 8N Horizontal injection hole 8Z A conventional injection hole 9A A diffusion chemical liquid 9B B diffusion chemical liquid 9C C diffusion chemical liquid 9N D diffusion chemical liquid 9N Weak horizontal diffusion chemical liquid 9W Diffusion chemical solution 9V Medium diffusion chemical solution 9Z Strong diffusion chemical solution 11T Tip bottom 11W Tip cylinder 11Z Spherical tip 11N Tip 13 Variable reference surface ring 14 Convex wall 16 Non-circular inner wall 17 Control part 20 Skin 21 Skin 22 Skin 23 Fat layer 24 Muscle Layer H Predetermined depth Hn Arbitrary depth Ha Inclination depth X0-X1 Horizontal direction (X0-X1 cross section)
X2-X3 (X2-X3 cross section)
Y0-Y1 Vertical direction α Horizontal difference angle

Claims (1)

ほぼ水平方向に噴射する水平噴射流（７Ｎ）を射出する水平ノズル（３Ｎ）を側面に設けた筒状の先端筒部（１１Ｗ）と、ほぼ平坦な底板状の先端底部（１１Ｔ）とを設けた先端部（１１Ｎ）を無針注射器の先端側に設け、更に前記先端筒部（１１Ｗ）にある前記水平ノズル（３Ｎ）の配設位置を無針注射器の位置決する基準面（６）より治療部位の深さに応じた所定深さ（Ｈ）として構成し、前記先端部（１１Ｎ）を皮膚（２０）の表面に押しつけてカップ状に凹まし、前記の凹んだ皮膚（２０）の表面を介して皮下組織に前記水平ノズル（３Ｎ）からの前記水平噴射流（７Ｎ）を噴射して、前記皮膚（２０）の表面から浅い位置にある治療部位に薬液（５）を広い範囲で拡散させる事を特徴とする無針注射器。  A cylindrical tip tube portion (11W) provided with a horizontal nozzle (3N) for injecting a horizontal jet flow (7N) for jetting in a substantially horizontal direction on the side surface and a substantially flat bottom plate-like tip bottom portion (11T) are provided. The distal end portion (11N) is provided on the distal end side of the needleless syringe, and further, the arrangement position of the horizontal nozzle (3N) in the distal end tubular portion (11W) is treated from the reference plane (6) for positioning the needleless syringe. It is configured as a predetermined depth (H) corresponding to the depth of the part, and the tip (11N) is pressed against the surface of the skin (20) to be recessed into a cup shape, and the surface of the recessed skin (20) is formed. The horizontal jet flow (7N) from the horizontal nozzle (3N) is sprayed to the subcutaneous tissue through the skin, and the drug solution (5) is diffused over a wide range from the surface of the skin (20) to the treatment site at a shallow position. Needleless syringe characterized by things.

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