WO2013065814A1 - 注射針 - Google Patents
注射針 Download PDFInfo
- Publication number
- WO2013065814A1 WO2013065814A1 PCT/JP2012/078443 JP2012078443W WO2013065814A1 WO 2013065814 A1 WO2013065814 A1 WO 2013065814A1 JP 2012078443 W JP2012078443 W JP 2012078443W WO 2013065814 A1 WO2013065814 A1 WO 2013065814A1
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- WO
- WIPO (PCT)
- Prior art keywords
- injection needle
- molybdenum
- blade
- cobalt
- alloy
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3286—Needle tip design, e.g. for improved penetration
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/02—Inorganic materials
- A61L31/022—Metals or alloys
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/14—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/329—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles characterised by features of the needle shaft
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2207/00—Methods of manufacture, assembly or production
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/04—Force
- F04C2270/042—Force radial
- F04C2270/0421—Controlled or regulated
Definitions
- the present invention relates to an injection needle, and more particularly to an injection needle made of an alloy containing cobalt and molybdenum.
- Patent Document 1 an improvement plan for reducing the piercing resistance and flow path resistance has been proposed (for example, Patent Document 1). That is, in this patent document 1, the injection needle provided with the taper part between the piercing part used as a blade edge
- the present invention is characterized in that, in a metal injection needle having a blade tip and a blade portion formed at the tip portion, the metal is an alloy containing cobalt and molybdenum.
- the surface roughness of the inner peripheral surface of the injection needle is small compared to the conventional product, and a smooth injection needle is provided. Can do.
- FIG. 3A The top view of the principal part which shows one Example of this invention.
- the side view from the arrow II direction of FIG. FIG. 3A is a manufacturing process diagram of the injection needle of the present embodiment shown in FIG. 1,
- FIG. 3A shows a process of forming a metal material
- FIG. 3B shows a first process of lancet cut
- FIG. c) shows the second step of the lancet cut.
- the figure which shows the composition of the element of the injection needle of a present Example shown in FIG. 1, and a conventional product The figure which shows the dimension of each part of the injection needle of a present Example shown in FIG. 1, and a conventional product.
- FIG. 9 is an enlarged photograph (150 times reflected electron image) of the tip portion of the injection needle of the present embodiment shown in FIG. 1
- FIG. 9A shows the most advanced portion (blade edge)
- FIG. 9C shows the rearmost part
- FIG. 10A is an enlarged photograph (150 times reflected electron image) of a conventional injection needle
- FIG. 10A shows the most advanced part (blade edge)
- FIG. 10B shows the center part
- FIG. (C) shows the rearmost part.
- FIG. 11 is an enlarged photograph (500 times reflected electron image) of the tip of the injection needle of the present embodiment shown in FIG. 1, FIG. 11 (a) shows the most advanced part (blade edge), and FIG. 11 (b) is the central part.
- FIG. 13C shows the rearmost part.
- 12 is an enlarged photograph (500 times reflected electron image) of a conventional injection needle, FIG. 12 (a) shows the most advanced part (blade edge), FIG. 12 (b) shows the central part, and FIG. (C) shows the rearmost part.
- reference numeral 1 denotes a metal injection needle
- the distal end portion 1A of the injection needle 1 is subjected to a manufacturing process such as a lancet cut as in the prior art.
- a blade edge 3, a blade portion 5, and the like are formed.
- the composition of the material will be described in detail later, the injection needle 1 of the present embodiment is characterized in that an alloy containing cobalt and molybdenum is used as the material (metal material).
- the manufacturing process of the injection needle 1 of the present embodiment will be described with reference to FIG.
- a thin plate made of an alloy containing cobalt and molybdenum is formed into a cylindrical shape to produce an elongated cylindrical metal material BM (see FIG. 3A).
- the front end portion 1A of the metal material BM is cut at an inclination of a required angle with respect to the axis C (see FIGS. 3A to 3B).
- the loop-shaped primary inclined surface 2 is formed in the tip portion 1A (see FIG. 3B).
- the metal material BM is rotated forward and backward at a required angle about the axis C as the rotation center, and then the left and right sides of the primary inclined surface 2 are further obliquely cut (see FIG. 3C).
- the secondary inclined surfaces 4 and 4 are formed on the left and right of the adjacent rear portion, and the remaining primary inclined surface 2 'is formed on the adjacent rear portion.
- the outer edges of the left and right secondary inclined surfaces 4 and 4 and the residual primary inclined surface 2 ′ are formed as blade portions 5 and 5.
- linear bulging portions 6 and 6 are generated at the boundary between the secondary inclined surfaces 4 and 4 and the residual primary inclined surface 2 ′ due to the inclination angle at the time of the two cutting operations.
- the shape of the distal end portion 1A of the injection needle 1 is substantially completed, but the left and right secondary inclined surfaces 4, 4 and the residual primary inclined surface 2 'are then mechanically polished.
- the blade edge 3 and the blade portions 5 and 5 are sharpened, but minute burrs are generated in these portions during mechanical polishing (not shown). Therefore, as a final process thereafter, the entire tip portion 1A including the blade edge 3 and the blade portion 5 is immersed in the electrolytic solution, and the tip portion 1A is electropolished.
- the burr of the blade portions 5 and 5 is removed if the time of electropolishing is too long, but the blade edge 3 is rounded. Is included.
- the time for electrolytic polishing of the tip portion 1A is set to a time for removing burrs from the blade edge 3 and the blade portions 5 and 5 and finishing smoothly.
- minute burrs generated during the mechanical polishing in the previous process are removed from the blade edge 3 and the blade portion 5, and those portions are finish-polished.
- the cutting edge 3 and the blade portion 5 are formed at the distal end portion 1A, and the manufacturing process of the injection needle 1 of this embodiment is completed.
- the cutting method of the tip portion of the material BM shown in FIGS. 3B to 3C is generally called “lancet cut”.
- the manufacturing process itself of the injection needle 1 of the present embodiment described above is the same as a conventionally known one, and the configuration of the lancet cut tip portion 1A is also known (see FIG. 7 of Patent Document 1).
- the injection needle 1 of this embodiment is made of an alloy containing cobalt and molybdenum, and the composition of this alloy is shown in the upper part of FIG. That is, the composition of the injection needle 1 of this example is as follows: cobalt 38.62% by mass, chromium 20.987% by mass, iron 14.37% by mass, nickel 14.29% by mass, molybdenum 7.43% by mass and the balance. It is comprised from the alloy which consists of another element.
- the material of the injection needle 1 is an alloy containing cobalt and molybdenum mainly composed of cobalt.
- the composition ratio of each element is preferably 39.00 to 42.00% by weight of cobalt, 18.00 to 21.50% by weight of chromium, 14.00 to 18.00% by weight of nickel, 6.50 to 8% of molybdenum. 0.000% by mass.
- the numerical value of the composition ratio of each element described in FIG. 4 describes the average value of the measured values at a plurality of locations in the injection needle 1.
- the lower part of FIG. 4 shows the composition of the stainless steel injection needle 1 manufactured by subjecting a thin plate made of an alloy of the conventional composition to the same manufacturing process as in this example. That is, the composition of the conventional injection needle 1 is composed of an alloy composed of 69.2% by mass of iron, 19.49% by mass of chrome, 8.81% by mass of nickel, and the balance other elements. In other words, the material of the conventional injection needle 1 is stainless steel mainly composed of iron.
- the numerical value of the composition ratio of each element described in FIG. 4 describes the average value of the measured values at a plurality of locations in the conventional injection needle 1.
- the injection needle 1 of the present embodiment having the composition shown in FIG. 4 and the conventional injection needle 1
- an alloy containing cobalt and molybdenum was measured. It has been clarified that the injection needle 1 of the present embodiment consisting of the above has a smaller flow path resistance than the conventional injection needle 1 made of stainless steel.
- the inventor of the present application prepared three samples each having the same outer diameter D and the same overall length as samples, and the present embodiment and the conventional product.
- Various tests were performed on each of the three injection needles 1.
- D indicates the outer diameter
- d1 indicates the inner diameter
- L1 is the axial dimension of the tip portion 1A
- L2 is the shortest dimension from the blade edge 3 to the bulging portion 6
- L3 is the axial dimension from the bulging portion 6 to the rearmost portion of the tip portion 1A.
- the blade surface angle indicates each inclination angle in the first step and the second step at the time of the lancet cut described above, and the rotation angle indicates a rotation angle obtained by rotating the metal material in the second step.
- FIG. 6 shows the measurement results regarding the surface roughness of the injection needle 1 of the present embodiment and the conventional product.
- this measurement result has shown the average value of the measured value measured about the injection needle 1 of a present Example, and each three samples of a conventional product.
- the numerical value of the injection needle 1 of this embodiment is clearly smaller than that of the conventional product, and the inner peripheral surface of this embodiment is smoother than the conventional product. It can be understood that.
- FIGS. 9 (a), 11 (a), and 13 the inner peripheral surface of the injection needle 1 of the present embodiment shows only minute wrinkles, whereas FIG. ), As shown in FIG. 12A and FIG. 14, minute wrinkles are seen over the entire inner peripheral surface of the conventional injection needle 1.
- the difference in roughness between the inner peripheral surface of the injection needle 1 of this embodiment and the inner peripheral surface of the conventional product can be attributed to the difference in the material of the injection needle 1. That is, since the injection needle 1 of this embodiment is an alloy containing cobalt and molybdenum, it is difficult to wrinkle the inner peripheral surface when the thin metal plate BM is formed into an elongated cylindrical shape in the manufacturing process described above. . On the other hand, the conventional stainless steel product is likely to be wrinkled over the entire inner peripheral surface when a thin plate-like stainless steel is formed into a cylindrical shape. Therefore, even when compared as a finished product after manufacture, the injection needle 1 of the present embodiment has a smoother inner peripheral surface and is smoother than the conventional product.
- FIG. 7 shows the time when water is circulated inside the injection needle 1. In this experiment, the time for 1 g of water to flow through the injection needle 1 at 50.0 kPa is shown.
- FIG. 7 also shows an average value of the results of testing the three injection needles 1 of this example and the conventional one. As shown in FIG. 7, the injection needle 1 of this example is 2.547 seconds, whereas the conventional product is 3.413 seconds, and the liquid flow rate of this example is higher than that of the conventional product. It is clear that there are many. In other words, it is clear that the flow resistance of this embodiment is smaller than that of the conventional product.
- the injection needle 1 having a flow path resistance smaller than that of the conventional product even if it has the same outer diameter as that of the conventional product.
- FIG. 8 shows the results of measuring the difference in hardness and rigidity between the injection needle 1 of this example and the conventional product.
- FIG. 8 also shows the average value of the measurement results for each of the three injection needles 1 of the present embodiment and the conventional product.
- the conventional product has a hardness of 424.7 (Hv) as opposed to 526.0 (Hv) in this embodiment.
- the needle 1 of this embodiment has a higher hardness than the conventional product.
- the measurement of rigidity was performed as follows. That is, the amount of deflection of the blade edge 3 when a load is applied 10 mm behind the blade edge 3 is measured. In the present embodiment, the deflection amount is 0.2586 mm, whereas the conventional product is 0.3548 mm.
- the present embodiment has higher rigidity than the conventional product.
- the injection needle 1 of this embodiment made of an alloy containing cobalt and molybdenum has higher hardness and rigidity than the conventional product, it is possible to realize an injection needle that is less likely to break than the conventional product. For this reason, if it is this invention, the injection needle 1 improved about the ease of folding which was a subject with the injection needle with a small diameter conventionally can be provided.
- the injection needle 1 of this embodiment is excellent in hardness and rigidity, it is possible to make the outer diameter of the injection needle 1 limited by the ISO standard extremely small.
- the injection needle 1 of the present embodiment it is possible to reduce the incidence rate of ISO non-compliant products that rises as the outer diameter becomes extremely small. Further, since the outer diameter is small, it is possible to reduce the probability that the injection needle 1 comes into contact with the pain receptor when the patient is injected. Furthermore, since the thickness of the injection needle 1 of the present embodiment can be made thinner than that of the conventional needle (see, for example, FIG. 5 above), the injection needle having an inner diameter larger than that of the conventional product even if the outer diameter is the same as that of the conventional product. 1 can be manufactured.
- the injection needle 1 of the present embodiment is suitable for administering a hormone agent that is easily crystallized by pressure.
- an ultra-fine diameter (outer diameter 0.185 mm to 0.200 mm, wall thickness 0.035 mm to 0.037 mm, inner diameter 0. 115 mm to 0.126 mm) can be realized.
- the burr of the blade edge 3 and the blade portion 5 is completely removed after the electropolishing which is the last step, and the secondary inclined surfaces 4 and 4 and the residual primary inclined surface 2 ′. Is also finished to a smooth surface. Further, the bulging portions 6 and 6 are also rounded, and the cross section thereof is a smooth arc shape. That is, this is apparent when comparing the present example and the conventional product with the enlarged photographs of FIGS. That is, as shown in FIGS. 9 (a) to 9 (b) and FIGS. 11 (a) to 11 (c), in this embodiment, the cutting edge 3 is in a state of being sharpened at an acute angle. The blade portion 5 and the secondary inclined surfaces 4 and 4 are smoothly finished and polished.
- the bulging portions 6 and 6 which are the boundary portions between the secondary inclined surfaces 4 and 4 and the residual primary inclined surface 2 ' are also rounded and have a smooth shape.
- the blade edge 3 has an acute angle, but the blade portions 5, 5 and Minute irregularities (burrs) remain on the secondary inclined surfaces 4 and 4.
- the bulging portions 6 and 6 that are the boundary portions between the secondary inclined surfaces 4 and 4 and the residual primary inclined surface 2 ′ remain in an angular linear shape.
- the present embodiment is the injection needle 1 made of an alloy containing cobalt and molybdenum
- the tip portion 1A including the blade tip 3 and the blade portions 5 and 5 is finished extremely smoothly after electrolytic polishing. Yes.
- the injection needle 1 contains cobalt, the electric resistance is small, so that the processing time of the electrolytic polishing can be shortened as compared with the prior art.
- the injection needle 1 of the present embodiment has the cutting edge 3, the blade portion 5, and the bulging portions 6 and 6 smoothly finished, the puncture resistance when the distal end portion 1A of the injection needle 1 is inserted into the patient. Can be reduced. Therefore, in this embodiment, it is possible to reduce the pain when the injection needle 1 is inserted into the patient compared to the conventional product.
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Abstract
Description
ここで、図3によって本実施例の注射針1の製造工程について説明する。すなわち、先ず、コバルトとモリブデンを含んだ合金からなる薄板を円筒状に成形して、細長い円筒状の金属素材BMを製作する(図3(a)参照)。次に、該金属素材BMの先端部分1Aを軸心Cに対して所要角度斜めに傾斜させて切断する(図3(a)~図3(b)参照)。これにより、先端部分1Aにループ状の一次傾斜面2が形成される(図3(b)参照)。その後、金属素材BMを軸心Cを回転中心として所要角度正逆に回転させてから上記一次傾斜面2の最先端側の左右両側をさらに斜めに切削する(図3(c)参照)。
それにより、刃先3となる最先端部分が形成されるとともに、その隣接後方部分の左右に二次傾斜面4,4が形成され、さらにその隣接後方部分に残留一次傾斜面2’が形成される。また、上記左右の二次傾斜面4,4および残留一次傾斜面2’の外方の縁部が刃部5,5として形成される。また、二次傾斜面4,4と残留一次傾斜面2’の境界部には、上記2回の切削加工時の傾斜角度に起因する直線状の膨出部6、6が生じている。
これにより、注射針1の先端部分1Aの形状は略完成するが、この後に上記左右の二次傾斜面4、4および残留一次傾斜面2’が機械研磨される。この機械研磨により、刃先3と刃部5、5が研ぎ出されるが、それらの箇所に機械研磨時の微小なバリが生じる(図示せず)。そこで、その後の最終工程として刃先3と刃部5を含めた先端部分1A全体を電解液に浸漬させて先端部分1Aを電解研磨する。ここで、コバルト及びモリブデンを含む合金からなる本実施例の注射針1は、電解研磨の時間が長すぎると刃部5,5のバリは除去される反面、刃先3は丸くなってしまうという問題を含んでいる。そこで、本実施例においては、先端部分1Aの電解研磨する時間としては、上記刃先3と刃部5,5からバリが除去され、かつ滑らかに仕上がる時間が設定されている。これにより、前工程の機械研磨時に生じた微小なバリが刃先3と刃部5から除去され、それらの箇所が仕上げ研磨される。
このようにして先端部分1Aに刃先3と刃部5が形成されて、本実施例の注射針1の製造工程が終了する。図3(b)~図3(c)で示した素材BMの先端部分の切削方法が、従来一般に『ランセットカット』と称されている。上述した本実施例の注射針1の製造工程自体は従来公知のものと同じであり、また、ランセットカットされた先端部分1Aの構成も公知である(特許文献1の図7参照)。
このことは、図9~図14に示した注射針1の先端部分と内周面を比較した拡大写真からも明らかである。図9(a)、図11(a)および図13に示すように、本実施例の注射針1の内周面は微小なシワが一部分にしか見られないのに対して、図10(a)、図12(a)および図14に示すように、従来品の注射針1の内周面は微小なシワが全域にわたって見られる。
この内周面の粗さの違いは、注射針1の内面を流通する液体の液流量の違いとしても現れる。つまり、図7は注射針1の内部に水を流通させた際の時間を測定したものである。この実験では、50.0kPaで1gの水が注射針1内を流れる時間を示している。なお、この図7においても、本実施例の注射針1と従来品の各3本について試験を行った結果の平均値を示している。この図7に示すように、本実施例の注射針1が2.547秒であるのに対して従来品は3.413秒となっており、本実施例の方が従来品よりも液流量が多いことは明らかである。換言すると、本実施例の方が従来品よりも流路抵抗が小さいことは明らかである。これは、上述した内周面の粗さの違いから来るものと考えられる。このように、本実施例によれば従来品と同一外径であっても従来品よりも流路抵抗が小さい注射針1を提供することができる。
硬度については、本実施例では526.0(Hv)に対して、従来品は424.7(Hv)となっている。明らかに本実施例の注射針1の方が従来品よりも硬度が高くなっている。
また、剛性の計測は次のようにして行われた。つまり、刃先3から10mm後方に荷重を掛けた場合の刃先3の撓み量を計測したものである。本実施例が0.2586mmの撓み量であるのに対して、従来品は0.3548mmとなっている。つまり、本実施例の方が従来品よりも剛性が高いことは明らかである。
このように、コバルト及びモリブデンを含む合金からなる本実施例の注射針1においては、従来品よりも硬度と剛性が高くなっているため、従来品より折れにくい注射針を実現可能である。このため、本発明であれば、従来、径が小さい注射針で課題であった折れやすさについて改善された注射針1を提供することができる。
また、本実施例の注射針1は硬度及び剛性に優れているので、ISO規格によって限界があった注射針1の外径を極細化することが可能である。そのため、本実施例の注射針1によれば、外径の極細化に伴い上昇するISO不適格品の発生率を低減させることできる。また、外径が小さいことにより、患者に注射をした際に、注射針1が痛みの受容体と接触する確率も低減させることができる。
さらに、本実施例の注射針1においては従来よりも肉厚を薄くすることができるので(例えば上記図5参照)、従来品と同じ外径であっても従来品よりも内径が大きな注射針1を製造することができる。このように、内径が大きな注射針1を提供できるので、注射針1内を流通する薬液の流量が大きくなり、注射針1内での薬液詰まりが生じにくい。また、薬液投与時における内圧上昇を抑えることができる。そのため、本実施例の注射針1は、圧力によって結晶化しやすいホルモン剤を投与する場合に好適である。
また、本発明の技術を用いれば、SUS使用の従来の方法では実施が困難であった超極細径(外径0.185mm~0.200mm、肉厚0.035mm~0.037mm、内径0.115mm~0.126mm)を実現可能である。
前述したように、本実施例は、コバルトとモリブデンを含んだ合金からなる注射針1であるため、電解研磨後において刃先3と刃部5,5を含めた先端部分1Aが極めて滑らかに仕上がっている。そして、この電解研磨の際には、注射針1がコバルトを含んでいるので電気抵抗が小さいことにより、電解研磨の処理時間を従来よりも短縮することができる。
このように、本実施例の注射針1は、刃先3と刃部5および膨出部6、6が滑らかに仕上がっているので、注射針1の先端部分1Aを患者に刺し込む際の穿刺抵抗を小さくすることが可能である。そのため、本実施例においては、注射針1を患者に刺し込む際の痛みを従来品よりも軽減させることが可能である。
3‥刃先 5、5‥刃部
Claims (5)
- 先端部分に刃先と刃部が形成された金属製の注射針において、
上記金属はコバルトとモリブデンを含んだ合金であることを特徴とする注射針。 - 上記合金は、コバルト39.00~42.00質量%と、モリブデン6.50~8.00質量%とを含んでいることを特徴とする請求項1に記載の注射針。
- 上記合金はクローム、鉄、ニッケルを含んでいることを特徴とする請求項1又は請求項2に記載の注射針。
- 上記合金は、コバルト39.00~42.00質量%と、モリブデン6.50~8.00質量%と、クローム18.00~21.50質量%と、ニッケル14.00~18.00質量%と、モリブデン6.50~8.00質量%とを含んでいることを特徴とする請求項1に記載の注射針。
- 上記先端部分の刃先と刃部は電解研磨によって滑らかに仕上げ研磨されていることを特徴とする請求項1から4のいずれかに記載の注射針。
Priority Applications (4)
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US14/353,709 US20140296797A1 (en) | 2011-11-04 | 2012-11-02 | Injection needle |
EP12846777.6A EP2774643A4 (en) | 2011-11-04 | 2012-11-02 | INJECTION NEEDLE |
JP2013541857A JP6073016B2 (ja) | 2011-11-04 | 2012-11-02 | 注射針の製造方法 |
US15/099,064 US20160303332A1 (en) | 2011-11-04 | 2016-04-14 | Method of manufacturing injection needle |
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US14/353,709 A-371-Of-International US20140296797A1 (en) | 2011-11-04 | 2012-11-02 | Injection needle |
US15/099,064 Division US20160303332A1 (en) | 2011-11-04 | 2016-04-14 | Method of manufacturing injection needle |
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WO2013065814A1 true WO2013065814A1 (ja) | 2013-05-10 |
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PCT/JP2012/078443 WO2013065814A1 (ja) | 2011-11-04 | 2012-11-02 | 注射針 |
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US (2) | US20140296797A1 (ja) |
EP (1) | EP2774643A4 (ja) |
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WO2019017164A1 (ja) * | 2017-07-20 | 2019-01-24 | トクセン工業株式会社 | 医療処置具用ワイヤ及びガイドワイヤ |
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JPWO2016006342A1 (ja) * | 2014-07-08 | 2017-04-27 | テルモ株式会社 | 注射針 |
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WO2016117164A1 (ja) * | 2015-01-20 | 2016-07-28 | テルモ株式会社 | 注射針組立体及びそれを備えた皮膚上層部への薬液注入用注射器 |
JP6940053B2 (ja) * | 2018-01-26 | 2021-09-22 | 住友電工ファインポリマー株式会社 | 医療用針 |
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Also Published As
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US20160303332A1 (en) | 2016-10-20 |
JPWO2013065814A1 (ja) | 2015-04-02 |
EP2774643A1 (en) | 2014-09-10 |
JP2017056289A (ja) | 2017-03-23 |
EP2774643A4 (en) | 2015-06-03 |
US20140296797A1 (en) | 2014-10-02 |
JP6073016B2 (ja) | 2017-02-01 |
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