JP2008154843A - Injection needle - Google Patents

Injection needle Download PDF

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JP2008154843A
JP2008154843A JP2006347911A JP2006347911A JP2008154843A JP 2008154843 A JP2008154843 A JP 2008154843A JP 2006347911 A JP2006347911 A JP 2006347911A JP 2006347911 A JP2006347911 A JP 2006347911A JP 2008154843 A JP2008154843 A JP 2008154843A
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needle
tip
needle tube
pair
axis
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JP4884955B2 (en
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Hiroshi Watanabe
浩志 渡辺
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NS Tool Co Ltd
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NS Tool Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an injection needle capable of easy puncture into the skin and securely relieving the pain at the time of puncture. <P>SOLUTION: The injection needle 1 has blade faces 3 having first and second inclined faces 3a and 3c inclined to the axis S of a needle cannula 2 from one side D1 in the direction of diameter at the distal end of the needle cannula 2 toward the other side D2 in the diameter direction at the proximal end 2c of the needle cannula 2. A pair of notched faces 5, which configure a pair of linear cutting blades 3d crossing the second inclined face 3c at an acute angle as seen from a cross sectional face and crossing the distal end 2b of the needle tip 4 at an acute angle as seen from the top, are disposed at both outer peripheral edges on the distal end side of the second inclined face 3c and located on both sides of the center face, the plane including the axis S of the needle cannula 2 in the diameter direction, on the rear side of the second inclined face 3c on the distal end side of the needle tip 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、注射器のルアー先に装着されて使用される医療用の注射針に関するものである。   The present invention relates to a medical injection needle used by being attached to a luer tip of a syringe.

従来、この種の注射針は、一般に、針先が針管の先端における一直径方向の一側部から針管の基端側における前記一直径方向の他側部に向けて針管の軸線に対して傾斜した刃面を備えている。そして、注射針の刺入時における痛みを軽減する等の目的のために、前記刃面が針管の基端側に針管の軸線に対して所定角度をなしかつ前記一直径方向の平面に直交するように形成した第一の傾斜面と、この第一の傾斜面と針管の先端を接続すると共に、針管の軸線に対する傾斜角度を前記第一の傾斜面の傾斜角度よりも大きくし、前記一直径方向の平面の両側に該平面に対して傾斜させて形成した第二、第三の傾斜面とを備えて、針先の先端を前記一直線方向の平面からずらされた位置に設定することにより、注射針の刺入時に、針先により皮膚にかかる力が分散されるようにした注射針が知られている（例えば、特許文献１）。また、前記第一の傾斜面と第二、第三の傾斜面との間に、針管の軸線に対する傾斜角度が前記第一の傾斜面の傾斜角度よりも大きく、前記第二、第三の傾斜面の傾斜角度よりも小さくした第４の傾斜面を設けることにより、前記刃面における各傾斜面間の角度差を小さくして、皮膚に対する刺入時の抵抗を低減するようにした注射針も知られている（例えば、特許文献２参照）。
特開２００３−２９０３５４号公報 特開２０００−２６２６１５号公報 Conventionally, in this type of injection needle, the needle tip is generally inclined with respect to the axis of the needle tube from one side in one diametric direction at the distal end of the needle tube toward the other side in the one diametric direction at the proximal end of the needle tube. The blade surface is provided. For the purpose of reducing pain during insertion of the injection needle, the blade surface forms a predetermined angle with respect to the axis of the needle tube on the proximal end side of the needle tube and is orthogonal to the plane in the one-diameter direction. The first inclined surface formed as described above, and the first inclined surface and the tip of the needle tube are connected, and the inclination angle with respect to the axis of the needle tube is larger than the inclination angle of the first inclined surface, and the one diameter The second and third inclined surfaces formed on both sides of the plane of the direction and inclined with respect to the plane, and by setting the tip of the needle tip to a position shifted from the plane of the straight line direction, An injection needle is known in which the force applied to the skin is dispersed by the needle tip during insertion of the injection needle (for example, Patent Document 1). Further, between the first inclined surface and the second and third inclined surfaces, the inclination angle with respect to the axis of the needle tube is larger than the inclined angle of the first inclined surface, and the second and third inclined surfaces An injection needle that reduces the resistance at the time of insertion into the skin by providing a fourth inclined surface that is smaller than the inclination angle of the surface, thereby reducing the angular difference between the inclined surfaces of the blade surface. It is known (see, for example, Patent Document 2).
JP 2003-290354 A JP 2000-262615 A

しかし、前記従来の注射針は、いずれも、針先の先細の先端側部に、その横断面視で前記刃面の第二、第三の傾斜面と刃面の背面側である針管の外周円弧面との交差部によって切刃が形成された形状になっているが、その切刃は刃面の背面側が円弧状であるために十分に先鋭化されていないので、注射時に注射針を皮膚に刺し込んだ際に、皮膚が凹んでから皮膚の抵抗が限界になった後に皮膚に刺入されることとなり、その際に注射針の刺入痛を生じさせる難点がある。   However, each of the conventional injection needles has an outer periphery of a needle tube which is the second and third inclined surfaces of the blade surface and the back surface side of the blade surface in a cross-sectional view on the tapered tip side portion of the needle tip. The cutting edge is formed by the intersection with the arc surface, but the cutting edge is not sharpened sufficiently because the back side of the blade surface is arcuate, so the injection needle is placed on the skin during injection. When the skin is stabbed into the skin, the skin is recessed and then the skin resistance is limited, and then the skin is stabbed.

本発明は、上記事情に鑑みてなされたものであって、皮膚への刺入が容易であり、刺入時における痛みを確実に軽減することができる注射針を提供することを目的とする。   This invention is made | formed in view of the said situation, Comprising: It aims at providing the injection needle which can pierce skin easily and can reduce the pain at the time of insertion reliably.

本発明は、前記課題を解決するために、以下の点を特徴としている。
すなわち、本発明の請求項１に係る注射針は、針管の先端における一直径方向の一側部から針管の基端側における前記一直径方向の他側部に向けて前記針管の軸線に対して傾斜させて刃面を形成した針先を備え、前記刃面が、前記針先における基端側の第一の傾斜面と、前記一直径方向において針管の軸線を含む平面である中心面の両側に位置して前記第一の傾斜面から針先の先端に接続され、前記針管の軸線に対する傾斜が第一の傾斜面より大きくされた一対の第二の傾斜面とを有し、該各第二の傾斜面は、前記針管の外周面側が内周面側よりも前記一直径方向の一側部に寄った位置となるように前記中心面に対して傾斜されている注射針であって、前記針先の先端側における各第二の傾斜面の裏側には、該各第二の傾斜面の先端側の外周縁に、横断面視で前記各第二の傾斜面に対して鋭角に交差し、平面視で針先の先端で鋭角に交差する一対の直線状の切刃を形成する一対の切欠面が、前記中心面の両側に位置して設けられていることを特徴としている。 The present invention is characterized by the following points in order to solve the above problems.
That is, the injection needle according to claim 1 of the present invention is directed to the axis of the needle tube from one side in the one-diameter direction at the distal end of the needle tube toward the other side in the one-diameter direction at the proximal end of the needle tube. A needle tip which is inclined to form a blade surface, and the blade surface is a first inclined surface on the proximal end side of the needle tip, and both sides of a central plane which is a plane including the axis of the needle tube in the one diameter direction A pair of second inclined surfaces connected to the tip of the needle tip from the first inclined surface and having an inclination with respect to the axis of the needle tube larger than that of the first inclined surface. The second inclined surface is an injection needle that is inclined with respect to the central surface so that the outer peripheral surface side of the needle tube is closer to one side in the one diameter direction than the inner peripheral surface side, On the back side of each second inclined surface on the tip side of the needle tip, the outer periphery on the tip side of each second inclined surface In addition, a pair of notch surfaces that form a pair of linear cutting blades that intersect at an acute angle with respect to each of the second inclined surfaces in a cross-sectional view and intersect at an acute angle at the tip of the needle tip in a plan view, It is characterized by being provided on both sides of the center plane.

また、請求項２に係る注射針は、請求項１に記載の注射針において、前記刃面の裏側には、前記針先の中心面に沿って前記一対の切欠面を隔てる円弧状のランドが針管の外周の一部として設けられていることを特徴としている。   The injection needle according to claim 2 is the injection needle according to claim 1, wherein an arc-shaped land that separates the pair of notch surfaces along a center surface of the needle tip is provided on the back side of the blade surface. It is provided as a part of the outer periphery of the needle tube.

本発明によれば、以下の優れた効果を奏する。
すなわち、請求項１に係る注射針によれば、針先の先端部に、刃面における一対の第二の傾斜面の裏面側に設けた一対の切欠面によって、各第二の傾斜面の外周縁に横断面視で尖鋭化された切刃を有する横断面菱形状の刃先が形状されるので、注射針を皮膚に刺入する際には、前記切刃の先端によって皮膚を削ぎ、削がれた皮膚を刃面の左右方向および表裏方向に均等に切り開いて針先を皮下へ挿入することができ、これにより、針先を刺し込み抵抗を小さくして皮膚へ容易に刺入することができると共に、皮膚に対する刺し込み痛を除去して、刺入時における痛みを確実に軽減することができる。 The present invention has the following excellent effects.
That is, according to the injection needle according to the first aspect, the pair of notch surfaces provided on the back surface side of the pair of second inclined surfaces on the blade surface at the distal end portion of the needle tip are arranged outside the second inclined surfaces. Since the cutting edge with a cross-sectional rhombus shape having a cutting edge sharpened in the cross-sectional view at the periphery is formed, when inserting the injection needle into the skin, the skin is scraped by the tip of the cutting blade, The needle tip can be inserted subcutaneously by cutting the cut skin evenly in the left and right direction and the front and back direction of the blade surface, and this allows the needle tip to be inserted into the skin with reduced resistance to penetration. In addition, it is possible to remove the piercing pain to the skin and reliably reduce the pain at the time of insertion.

また、請求項２に係る注射針によれば、針先の先端部の強度をランドによって向上させることができると共に、針先の研削加工時に、一対の切欠面どうしの交差部を針先の中心面で正確に一致させる必要がなく、切欠面の加工が容易となる。   In addition, according to the injection needle according to claim 2, the strength of the tip of the needle tip can be improved by the land, and at the time of grinding of the needle tip, the intersecting portion between the pair of notch surfaces is the center of the needle tip. It is not necessary to make the surfaces exactly coincide with each other, and the cut surface can be easily processed.

以下、本発明の一実施の形態に係る注射針について図面を参照して説明する。
図１〜図６は本発明の一実施の形態に係る注射針１を示す。この注射針１は、ステンレス鋼ないしはニッケルクロム鋼等の材料からなり、例えば外径が０．８ｍｍ、内径が０．４９ｍｍの針管２を備えている。該針管２の先端側２ａには、針管２の先端２ｂにおける一直径方向Ｄ（図３参照）の一側部Ｄ１から針管２の基端部側２ｃにおける前記一直径方向Ｄの他側部Ｄ２に向けて針管２の軸線Ｓに対して傾斜した刃面３を有する針先４が設けられている。 Hereinafter, an injection needle according to an embodiment of the present invention will be described with reference to the drawings.
1 to 6 show an injection needle 1 according to an embodiment of the present invention. The injection needle 1 is made of a material such as stainless steel or nickel chrome steel, and includes a needle tube 2 having an outer diameter of 0.8 mm and an inner diameter of 0.49 mm, for example. The distal end side 2a of the needle tube 2 has a one-side portion D1 in the one-diameter direction D (see FIG. 3) at the distal end 2b of the needle tube 2 to the other-side portion D2 in the one-diameter direction D at the proximal end portion 2c of the needle tube 2. A needle tip 4 having a blade surface 3 inclined with respect to the axis S of the needle tube 2 is provided.

前記刃面３は、前記一直径方向Ｄにおいて針管２の軸線Ｓを含む平面（針先４の中心面）Ｄｏに直交し、先端側が前記直径方向Ｄの一側部Ｄ１における針管２の内周面２ｄの位置を通り、前記針管２の軸線Ｓに対して傾斜角度θ１で傾斜された１つの第一の傾斜面３ａと、前記針先４の中心面Ｄｏ内に針管２（針先４）の先端２ｂを通り、針管２の軸線Ｓに対して傾斜角度θ２で傾斜された稜線３ｂを形成する、前記中心面Ｄｏの両側に配置された一対の第二の傾斜面３ｃ，３ｃとを有している。   The blade surface 3 is orthogonal to a plane (center surface of the needle tip 4) Do including the axis S of the needle tube 2 in the one diameter direction D, and the tip side is the inner periphery of the needle tube 2 in the one side portion D1 of the diameter direction D. One first inclined surface 3a that passes through the position of the surface 2d and is inclined at an inclination angle θ1 with respect to the axis S of the needle tube 2 and the needle tube 2 (needle tip 4) in the center plane Do of the needle tip 4 A pair of second inclined surfaces 3c, 3c disposed on both sides of the central plane Do, which form a ridge line 3b that is inclined at an inclination angle θ2 with respect to the axis S of the needle tube 2. is doing.

前記第二の傾斜面３ｃ，３ｃは、前記針先４の先端２ｂと針先４の長さ方向の中間部における前記第一の傾斜面３ａとを接続し、図６に示すように、前記針管２の外周側が内周側よりも前記一直径方向Ｄの一側部Ｄ１に寄った位置となるように前記針先４の中心面Ｄｏに直交する面に対して傾斜角度δで傾斜されている。そして、前記第一の傾斜面３ａの傾斜角度θ１は、１５°〜２０°に設定され、前記稜線３ｂの傾斜角度θ２は、傾斜角度θ１より大きく、１８°〜２２°に設定され、また、第二の傾斜面３ｃ，３ｃの傾斜角度δは、１８°〜２１°に設定されている。前記各傾斜角度θ１，θ２，δは、針管２の内外径の大きさに応じて前記範囲の中から適切な数値が選択される。   The second inclined surfaces 3c, 3c connect the tip 2b of the needle tip 4 and the first inclined surface 3a at the intermediate portion in the length direction of the needle tip 4, and as shown in FIG. The needle tube 2 is inclined at an inclination angle δ with respect to a plane perpendicular to the center surface Do of the needle tip 4 so that the outer peripheral side of the needle tube 2 is closer to the one side portion D1 of the one diameter direction D than the inner peripheral side. Yes. The inclination angle θ1 of the first inclined surface 3a is set to 15 ° to 20 °, the inclination angle θ2 of the ridge line 3b is set to be larger than the inclination angle θ1 and 18 ° to 22 °, and The inclination angle δ of the second inclined surfaces 3c, 3c is set to 18 ° to 21 °. As the respective inclination angles θ1, θ2, δ, appropriate numerical values are selected from the above ranges according to the size of the inner and outer diameters of the needle tube 2.

また、前記針先４の先端側における刃面３（第二の傾斜面３ｃ，３ｃ）の裏側には、該第二の傾斜面３ｃ，３ｃの先端側の各外周縁に、図６（ａ）（ｂ）に示すように、横断面視で前記第二の傾斜面３ｃ，３ｃに対して鋭角に交差し、平面視で針先４の先端２ｂで鋭角に交差する一対の直線状の切刃３ｄ，３ｄを形成する一対の切欠面５，５が、前記一直径方向Ｄにおいて針管２の軸線Ｓを含む平面である中心面Ｄｏの両側に位置して設けられている。そして、前記中心面Ｄｏを境にしてその両側に前記一対の切欠面５，５を隔てる円弧状のランド５ａが針管２の外周面２ｅの一部として設けられている。   Further, on the back side of the blade surface 3 (second inclined surfaces 3c, 3c) on the tip side of the needle tip 4, each outer peripheral edge on the tip side of the second inclined surfaces 3c, 3c is shown in FIG. ) As shown in (b), a pair of straight cuts intersecting the second inclined surfaces 3c, 3c at an acute angle in a cross-sectional view and intersecting at an acute angle at the tip 2b of the needle tip 4 in a plan view. A pair of notch surfaces 5 and 5 forming the blades 3d and 3d are provided on both sides of a center plane Do which is a plane including the axis S of the needle tube 2 in the one diameter direction D. Then, arc-shaped lands 5a separating the pair of cutout surfaces 5 and 5 from both sides of the center plane Do are provided as a part of the outer peripheral surface 2e of the needle tube 2.

前記切欠面５，５は、前記中心面Ｄｏに直交する面に対して傾斜角度βで中心面Ｄｏから離れるにしたがって針管２の軸線Ｓ側に近づくように傾斜され、かつ針管２の先端から基端側へ行くにしたがって徐々に針管２の外周面に対する切欠き深さが浅くなるように傾斜されている。前記傾斜角度βは、前記第二の傾斜面３ｃ，３ｃの傾斜角度δと略等しく、前記針管２の内外径に応じて、角度範囲１８°〜２１°の中から選択された適切な数値に設定されている。また、前記ランド５ａの幅ｅは、前記針先４の先端部で例えば略０．０２ｍｍとされ、針管２の基端部側へ行くにしたがって徐々に広がるように設けられている。前記針先４の先端部において前記切刃３ｄ，３ｄが交差してなす刃先角αは、前記針管２の内外径に応じて、角度範囲ば５０°〜７５°の中から選択された適切な数値に設定されている。   The notch surfaces 5 and 5 are inclined so as to approach the axis S side of the needle tube 2 as the distance from the center surface Do increases with an inclination angle β with respect to a surface orthogonal to the center surface Do, and from the tip of the needle tube 2 to the base surface. As it goes to the end side, the notch depth with respect to the outer peripheral surface of the needle tube 2 is gradually inclined. The inclination angle β is substantially equal to the inclination angle δ of the second inclined surfaces 3c, 3c, and is an appropriate numerical value selected from an angle range of 18 ° to 21 ° according to the inner and outer diameters of the needle tube 2. Is set. Further, the width e of the land 5a is, for example, approximately 0.02 mm at the distal end portion of the needle tip 4, and is provided so as to gradually increase toward the proximal end portion side of the needle tube 2. The cutting edge angle α formed by the intersection of the cutting edges 3d and 3d at the tip of the needle tip 4 is an appropriate angle selected from 50 ° to 75 ° in the angle range according to the inner and outer diameters of the needle tube 2. It is set to a numerical value.

このようにして、前記注射針１における針先４の先端部には、前記刃面３の第二の傾斜面３ｃ，３ｃと、その裏面側に設けられた前記切欠面５，５とによって、針先４の先端から基端側に向けて徐々に横断面形状が大きくなる菱形状の刃先４ａが形成され、その前記中心面Ｄｏから離れた縁部に尖鋭化された切刃３ｄ、３ｄが形成され、かつその刃先角αが平面視で鋭角に形成されるので、注射時には、針先４の先端部を皮膚に差し込む際に、前記刃先４ａの切刃３ｄ、３ｄによって皮膚が削がれる態様で刃面の幅方向および表裏方向に均等に切り開かれて、刃先４ａが抵抗なく皮下に挿入される。これにより、皮膚に対する注射針の刺し込み痛を効果的に除去することができ、注射時の刺入痛を軽減することができる。   Thus, at the tip of the needle tip 4 of the injection needle 1, the second inclined surfaces 3c, 3c of the blade surface 3 and the notched surfaces 5, 5 provided on the back side thereof, A diamond-shaped cutting edge 4a having a gradually increasing cross-sectional shape from the distal end of the needle tip 4 toward the proximal end side is formed, and sharpened cutting edges 3d and 3d are formed at the edge away from the center plane Do. Since the cutting edge angle α is formed with an acute angle in plan view, the skin is scraped by the cutting edges 3d and 3d of the cutting edge 4a when the tip of the needle tip 4 is inserted into the skin during injection. In this manner, the blade edge 4a is cut open evenly in the width direction and the front and back direction of the blade surface, and the blade edge 4a is inserted subcutaneously without resistance. Thereby, the puncture pain of the injection needle with respect to skin can be removed effectively, and the puncture pain at the time of injection can be reduced.

前記注射針１の皮膚に対する刺し込み痛の除去効果は、前記刃先４ａの形状において、前記各傾斜角度α，β，δがそれぞれ所定の角度範囲に設定されることによって得られるものであり、前記第二の傾斜面３ｃ，３ｃの傾斜角度δと前記切欠面５，５の傾斜角度βがそれらの下限の数値より小さい場合には、前記針先４の刃先４ａが薄くなって弱くなり、また、前記傾斜角度δ，βが上限の数値より大きい場合には、前記刃先４ａの切刃３ｄ，３ｄの鋭さが弱まって切刃３ｄによる皮膚を削ぐ効果が低下するので、刺入痛を生じさせるおそれがある。前記傾斜角度δ，βより重要度は若干低いが、前記刃先４ａの刃先角αがその上限値より大きい場合は、刃先４ａを皮膚に刺し込みにくく、刺し込み痛の除去効果が低下し、また、下限値より小さい場合には、針先４の先端側が細くなり過ぎて強度が弱くなる。   The effect of removing the puncture pain on the skin of the injection needle 1 is obtained by setting the respective inclination angles α, β, δ within predetermined angle ranges in the shape of the cutting edge 4a, When the inclination angle δ of the second inclined surfaces 3c, 3c and the inclination angle β of the notched surfaces 5, 5 are smaller than their lower limit values, the cutting edge 4a of the needle tip 4 becomes thin and weak, and When the inclination angles δ and β are larger than the upper limit numerical values, the sharpness of the cutting edges 3d and 3d of the cutting edge 4a is weakened, and the effect of scraping the skin by the cutting edge 3d is reduced, so that insertion pain occurs. There is a fear. Although the importance is slightly lower than the inclination angles δ and β, when the blade edge angle α of the blade edge 4a is larger than the upper limit value, the blade edge 4a is hard to be inserted into the skin, and the effect of removing the insertion pain is reduced. If it is smaller than the lower limit, the tip side of the needle tip 4 becomes too thin and the strength becomes weak.

以上説明したように、前記実施の形態に係る注射針１は、針管２の先端２ｂにおける一直径方向Ｄの一側部Ｄ１から針管２の基端側２ｃにおける前記一直径方向Ｄの他側部Ｄ２に向けて前記針管２の軸線Ｓに対して傾斜させて刃面３を形成した針先４を備え、前記刃面３が、前記針先４における基端側の第一の傾斜面３ａと、前記一直径方向Ｄにおいて針管２の軸線Ｓを含む平面である中心面Ｄｏの両側に位置して前記第一の傾斜面３ａから針先４の先端２ｂに接続され、前記針管２の軸線Ｓに対する傾斜角度θ２が第一の傾斜面３ａの傾斜角度θ１より大きくされた一対の第二の傾斜面３ｃ，３ｃとを有し、該各第二の傾斜面３ｃ，３ｃは、前記針管２の外周面２ｅ側が内周面２ｄ側よりも前記一直径方向Ｄの一側部Ｄ１に寄った位置となるように前記中心面Ｄｏに対して傾斜されており、前記針先４の先端側における各第二の傾斜面３ｃ，３ｃの裏側には、該各第二の傾斜面３ｃ，３ｃの先端側の外周縁に、横断面視で前記各第二の傾斜面３ｃ，３ｃに対して鋭角に交差し、平面視で針先４の先端２ｂで鋭角に交差する一対の直線状の切刃３ｄ，３ｄを形成する一対の切欠面５，５が、前記中心面Ｄｏの両側に位置して設けられた構成とされている。   As described above, the injection needle 1 according to the embodiment includes the other side portion of the one-diameter direction D on the proximal end side 2c of the needle tube 2 from the one-side portion D1 of the one-diameter direction D on the distal end 2b of the needle tube 2. A needle tip 4 which is inclined with respect to the axis S of the needle tube 2 to form a blade surface 3 toward D2, and the blade surface 3 includes a first inclined surface 3a on the proximal end side of the needle tip 4 and The first inclined surface 3a is connected to the tip 2b of the needle tip 4 on both sides of the center plane Do which is a plane including the axis S of the needle tube 2 in the one diameter direction D, and the axis S of the needle tube 2 is connected. And a pair of second inclined surfaces 3c, 3c whose inclination angle θ2 is larger than the inclination angle θ1 of the first inclined surface 3a. The second inclined surfaces 3c, 3c The outer peripheral surface 2e side is closer to the one side portion D1 of the one diameter direction D than the inner peripheral surface 2d side. It is inclined with respect to the center plane Do, and on the back side of each second inclined surface 3c, 3c on the tip side of the needle tip 4, the tip side of each second inclined surface 3c, 3c A pair of linear cutting blades 3d, 3d intersecting the outer peripheral edge at an acute angle with respect to the second inclined surfaces 3c, 3c in a cross-sectional view and intersecting with an acute angle at the tip 2b of the needle tip 4 in a plan view. A pair of notch surfaces 5 and 5 that form the shape are provided on both sides of the center plane Do.

したがって、前記実施の形態に係る注射針１によれば、針先４の先端部に、刃面３における一対の第二の傾斜面３ｃ，３ｃの裏面側に設けた一対の切欠面５，５によって、各第二の傾斜面３ｃ，３ｃの外周縁に横断面視で尖鋭化された切刃３ｄ，３ｄを有する横断面が上下左右対称な菱形状の刃先４ａが形状されるので、注射針１を皮膚に刺入する際には、前記切刃３ｄ，３ｄの先端によって皮膚を削ぎ、削がれた皮膚を刃面３の幅方向および表裏方向に均等に切り開いて針先４を皮下へ挿入することができ、これにより、針先４を刺し込み抵抗を小さくして皮膚へ容易に刺入することができると共に、皮膚に対する刺し込み痛を除去して、刺入時における痛みを確実に軽減することができる。   Therefore, according to the injection needle 1 according to the above-described embodiment, a pair of notch surfaces 5, 5 provided on the back surface side of the pair of second inclined surfaces 3 c, 3 c on the blade surface 3 at the tip of the needle tip 4. Accordingly, a rhombus-shaped cutting edge 4a having a cross-sectional shape that is vertically and horizontally symmetrical, having cutting edges 3d and 3d sharpened in the cross-sectional view on the outer peripheral edge of each of the second inclined surfaces 3c and 3c is formed. When the needle 1 is inserted into the skin, the skin is shaved with the tips of the cutting blades 3d, 3d, and the shaved skin is cut evenly in the width direction and the front and back direction of the blade surface 3 to bring the needle tip 4 subcutaneously. As a result, the needle tip 4 can be easily inserted into the skin with reduced resistance to puncture, and the puncture pain to the skin can be removed to ensure pain at the time of insertion. Can be reduced.

また、前記刃面３の裏側には、前記中心面Ｄｏに沿って前記一対の切欠面５，５を隔てる円弧状のランド５ａが針管２の外周面２ｅの一部として設けられているので、針先４の先端部の強度をランド５ａによって向上させることができると共に、針先４の研削加工時に、一対の切欠面５，５どうしの交差部を針先４の中心面Ｄｏで正確に一致させる必要がなく、切欠面５，５の加工が容易となる。
なお、前記においては、前記刃面３の第二の傾斜面３ｃ，３ｃの背面側に、針管２（針先４）の先端２ｂから基端側にわたって一対の切欠面５，５の相互間にランド５ａを設けたが、これに限らず、図７、図８に示すように、一対の切欠面３ｃ，３ｃの中心面Ｄｏ側の縁どうしを接近させて、針先４の先端側で針管２の軸線Ｓ方向における所定長さにわたって、前記縁どうしを前記中心面Ｄｏに一致させて刃先４ａの先端側におけるランド５ａを省略することができる。この場合には、針先４の先端部に横断面が菱形の刃先４ａ’が形成される。 Further, on the back side of the blade surface 3, an arc-shaped land 5a that separates the pair of cutout surfaces 5 and 5 along the center surface Do is provided as a part of the outer peripheral surface 2e of the needle tube 2. The strength of the tip of the needle tip 4 can be improved by the land 5a, and at the time of grinding of the needle tip 4, the intersection of the pair of notch surfaces 5 and 5 is exactly coincident with the center plane Do of the needle tip 4. Therefore, it is easy to process the notched surfaces 5 and 5.
In the above description, on the back side of the second inclined surfaces 3c, 3c of the blade surface 3, between the pair of cutout surfaces 5, 5 from the distal end 2b of the needle tube 2 (needle tip 4) to the proximal end side. Although the land 5a is provided, the present invention is not limited thereto, and as shown in FIGS. 7 and 8, the edges on the center plane Do side of the pair of notch surfaces 3c and 3c are brought close to each other, and the needle tube is formed The lands 5a on the tip side of the cutting edge 4a can be omitted by making the edges coincide with the center plane Do over a predetermined length in the direction of the axis S of 2. In this case, a cutting edge 4 a ′ having a rhombic cross section is formed at the tip of the needle tip 4.

本発明の第一の実施の形態に係る注射針を示す側面図である。It is a side view which shows the injection needle which concerns on 1st embodiment of this invention. 同じく平面図である。It is also a plan view. 同じく正面図である。It is also a front view. 同じく背面図である。It is a back view similarly. 同じく斜視図である。It is a perspective view similarly. 同じく針先の先端側の横断面図である。It is a cross-sectional view of the tip side of the needle tip similarly. ランドを省略した針先の先端側の横断面図である。It is a cross-sectional view of the tip end side of the needle tip with the land omitted. 同じく背面図である。It is a back view similarly.

符号の説明Explanation of symbols

１，１Ａ 注射針
２ 針管
２ａ 先端側
２ｂ 先端
２ｃ 基端側
２ｄ 内周面
２ｅ 外周面
３ 刃面
３ａ，３ｃ 傾斜面
３ｄ 切刃
４ 針先
４ａ 刃先
Ｄ 半径方向
Ｄｏ 中心面
Ｄ１ 一側部
Ｄ２ 他側部
Ｓ 軸線
α，β，θ１，θ２ 傾斜角度 DESCRIPTION OF SYMBOLS 1,1A Injection needle 2 Needle tube 2a Tip side 2b Tip 2c Base end side 2d Inner peripheral surface 2e Outer peripheral surface 3 Blade surface 3a, 3c Inclined surface 3d Cutting blade 4 Needle tip 4a Cutting edge D Radial direction Do Central surface D1 One side D2 Other side S-axis α, β, θ1, θ2 Inclination angle

Claims (2)

針管の先端における一直径方向の一側部から針管の基端側における前記一直径方向の他側部に向けて前記針管の軸線に対して傾斜させて刃面を形成した針先を備え、前記刃面が、前記針先における基端側の第一の傾斜面と、前記一直径方向において針管の軸線を含む平面である中心面の両側に位置して前記第一の傾斜面から針先の先端に接続され、前記針管の軸線に対する傾斜が第一の傾斜面より大きくされた一対の第二の傾斜面とを有し、該各第二の傾斜面は、前記針管の外周面側が内周面側よりも前記一直径方向の一側部に寄った位置となるように前記中心面に対して傾斜されている注射針であって、
前記針先の先端側における各第二の傾斜面の裏側には、該各第二の傾斜面の先端側の外周縁に、横断面視で前記各第二の傾斜面に対して鋭角に交差し、平面視で針先の先端で鋭角に交差する一対の直線状の切刃を形成する一対の切欠面が、前記中心面の両側に位置して設けられていることを特徴とする注射針。 A needle tip that is inclined with respect to the axis of the needle tube from one side in the one-diameter direction at the distal end of the needle tube toward the other side in the one-diameter direction at the proximal end of the needle tube, The blade surface is located on both sides of the first inclined surface on the proximal end side of the needle tip and the center plane which is a plane including the axis of the needle tube in the one diameter direction, and the needle tip extends from the first inclined surface. A pair of second inclined surfaces connected to the tip and having an inclination with respect to the axis of the needle tube larger than that of the first inclined surface, and each of the second inclined surfaces has an inner peripheral surface on the outer peripheral surface side of the needle tube An injection needle that is inclined with respect to the central plane so as to be closer to one side in the one diameter direction than the plane side;
On the back side of each second inclined surface on the tip end side of the needle tip, intersects the outer peripheral edge on the tip side of each second inclined surface at an acute angle with respect to each second inclined surface in a cross-sectional view. And a pair of notch surfaces forming a pair of linear cutting blades intersecting at an acute angle at the tip of the needle tip in a plan view are provided on both sides of the central surface. . 前記刃面の裏側には、前記中心面に沿って前記一対の切欠面を隔てる円弧状のランドが針管の外周の一部として設けられていることを特徴とする請求項１に記載の注射針。   2. The injection needle according to claim 1, wherein an arc-shaped land that separates the pair of notch surfaces along the center surface is provided on a back side of the blade surface as a part of an outer periphery of the needle tube. .
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010104781A (en) * 2008-10-28 2010-05-13 Alain Villette Injection needle
JP2013141488A (en) * 2012-01-10 2013-07-22 Nipro Corp Puncture needle
US8568422B2 (en) 2008-09-01 2013-10-29 Nigel Morlet Cutting needle tip for surgical instrument
JP2014004249A (en) * 2012-06-26 2014-01-16 Unique Medical Co Ltd Injection needle and electrode needle
WO2017017936A1 (en) * 2015-07-30 2017-02-02 テルモ株式会社 Medical puncture needle and method for producing puncture needle
US9566189B2 (en) 2011-08-03 2017-02-14 Nigel Morlet Grooved needle tip for surgical instrument
US9867736B2 (en) 2010-03-29 2018-01-16 Nigel Morlet Needle tip for surgical instrument
CN109223000A (en) * 2018-11-14 2019-01-18 威海永欣医疗科技有限公司 The antipollution visual elbow blood taking needle of one kind and production method
CN109549690A (en) * 2017-09-27 2019-04-02 泰尔茂株式会社 Therapeutic medical puncture needle
WO2023176645A1 (en) * 2022-03-15 2023-09-21 テルモ株式会社 Puncture needle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3308822A (en) * 1964-04-02 1967-03-14 Loretta Fontano Hypodermic needle
JPS5528274Y2 (en) * 1978-05-18 1980-07-05
US4490139A (en) * 1983-01-28 1984-12-25 Eli Lilly And Company Implant needle and method
JPH0956815A (en) * 1995-04-28 1997-03-04 Yoshikuni Saito Medical hollow needle and manufacture of the same
JP2005095571A (en) * 2003-08-28 2005-04-14 Hanako Medical Kk Improved medical syringe needle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3308822A (en) * 1964-04-02 1967-03-14 Loretta Fontano Hypodermic needle
JPS5528274Y2 (en) * 1978-05-18 1980-07-05
US4490139A (en) * 1983-01-28 1984-12-25 Eli Lilly And Company Implant needle and method
JPH0956815A (en) * 1995-04-28 1997-03-04 Yoshikuni Saito Medical hollow needle and manufacture of the same
JP2005095571A (en) * 2003-08-28 2005-04-14 Hanako Medical Kk Improved medical syringe needle

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8568422B2 (en) 2008-09-01 2013-10-29 Nigel Morlet Cutting needle tip for surgical instrument
JP2010104781A (en) * 2008-10-28 2010-05-13 Alain Villette Injection needle
US9867736B2 (en) 2010-03-29 2018-01-16 Nigel Morlet Needle tip for surgical instrument
US9566189B2 (en) 2011-08-03 2017-02-14 Nigel Morlet Grooved needle tip for surgical instrument
JP2013141488A (en) * 2012-01-10 2013-07-22 Nipro Corp Puncture needle
JP2014004249A (en) * 2012-06-26 2014-01-16 Unique Medical Co Ltd Injection needle and electrode needle
JPWO2017017936A1 (en) * 2015-07-30 2018-05-17 テルモ株式会社 Medical puncture needle and puncture needle manufacturing method
CN107847670A (en) * 2015-07-30 2018-03-27 泰尔茂株式会社 The manufacture method of medical puncture needle and puncture needle
WO2017017936A1 (en) * 2015-07-30 2017-02-02 テルモ株式会社 Medical puncture needle and method for producing puncture needle
US10722264B2 (en) 2015-07-30 2020-07-28 Terumo Kabushiki Kaisha Medical puncture needle and method for manufacturing puncture needle
CN107847670B (en) * 2015-07-30 2020-09-04 泰尔茂株式会社 Medical puncture needle and method for manufacturing puncture needle
CN111973842A (en) * 2015-07-30 2020-11-24 泰尔茂株式会社 Medical puncture needle and method for manufacturing puncture needle
CN109549690A (en) * 2017-09-27 2019-04-02 泰尔茂株式会社 Therapeutic medical puncture needle
CN109549690B (en) * 2017-09-27 2023-08-22 泰尔茂株式会社 medical puncture needle
CN109223000A (en) * 2018-11-14 2019-01-18 威海永欣医疗科技有限公司 The antipollution visual elbow blood taking needle of one kind and production method
WO2023176645A1 (en) * 2022-03-15 2023-09-21 テルモ株式会社 Puncture needle

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