WO2022181527A1 - Tube d'aiguille, ensemble tube d'aiguille et aiguille à injection - Google Patents

Tube d'aiguille, ensemble tube d'aiguille et aiguille à injection Download PDF

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Publication number
WO2022181527A1
WO2022181527A1 PCT/JP2022/006891 JP2022006891W WO2022181527A1 WO 2022181527 A1 WO2022181527 A1 WO 2022181527A1 JP 2022006891 W JP2022006891 W JP 2022006891W WO 2022181527 A1 WO2022181527 A1 WO 2022181527A1
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WO
WIPO (PCT)
Prior art keywords
needle tube
needle
tip
root
opening
Prior art date
Application number
PCT/JP2022/006891
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English (en)
Japanese (ja)
Inventor
治 大場
Original Assignee
株式会社狭山金型製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社狭山金型製作所 filed Critical 株式会社狭山金型製作所
Priority to JP2023502377A priority Critical patent/JPWO2022181527A1/ja
Publication of WO2022181527A1 publication Critical patent/WO2022181527A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles

Definitions

  • the present invention relates to resin needle tubes, needle tube units, and injection needles.
  • Patent Literature 1 injection needles made of resin have been proposed (for example, Patent Literature 1).
  • Patent Document 1 when the conventional injection needle proposed in Patent Document 1 is applied to injection into the human body, since it has a groove, it is avoided that the human tissue is cut by the groove when the needle is inserted into the human body. It is a structure that cannot be inserted, and the damage to the human body, etc. was great at the time of insertion.
  • the groove is not provided, the mold for forming the opening becomes very small, and there is a high possibility that burrs will be generated, which may make molding very difficult.
  • An object of the present invention is to provide a needle tube, a needle tube unit, and an injection needle that can reduce damage to the human body or the like during insertion and are easy to manufacture.
  • a first invention is a resin needle tube (1, 1B, 1C) used for an injection needle (5), comprising a root portion (111) and a tip portion (117) opposite to the root portion (111). ), a channel (120) formed inside, and an opening ( 117b), and the flow path (120) is a needle tube (1, 1B, 1C) having an extension (125a) extending beyond the opening (117b) to the distal side.
  • a second invention is the needle tube (1, 1B, 1C) according to the first invention, wherein the parting line (PL) extending between the tip portion (117) and the root portion (111) is A needle tube characterized in that it is provided on at least the outer peripheral surface, and at least one opening (117b) is provided in each of two regions bounded by the parting line (PL). (1, 1B, 1C).
  • a third invention is the needle tube (1, 1B, 1C) according to the second invention, characterized in that a flat portion (130) is provided around the parting line (PL). It is a needle tube (1, 1B, 1C) to do.
  • a fourth invention is the needle tube (1, 1B, 1C) according to any one of the first to third inventions, wherein the extension (125a) of the flow path (120) A needle tube (1, 1B, 1C) characterized in that the inner diameter tapers toward.
  • a fifth invention is the needle tube (1, 1B, 1C) according to any one of the first invention to the fourth invention, wherein the edge (117c) of the opening (117b) is rounded.
  • a needle tube (1, 1B, 1C) characterized by:
  • a sixth aspect of the invention is the needle tube (1, 1B, 1C) according to any one of the first to fifth aspects, wherein the distal end (117a) of the tip portion (117a) is formed into a spherical surface.
  • a needle tube (1, 1B, 1C) characterized by:
  • a seventh invention is the needle tube (1, 1B, 1C) according to any one of the first invention to the sixth invention, wherein the needle tube (1, 1B, 1C) gradually extends outward from the distal end portion (117) toward the root portion (111).
  • a needle tube (1, 1B, 1C) characterized by comprising a substantially conical portion (112, 113, 115) with a larger diameter.
  • a flow path (120) formed inside extends from the tip (117) to the root (111).
  • a needle tube (1, 1B, 1C) characterized by comprising a substantially conical portion (122, 124, 125a, 126) whose inner diameter gradually increases.
  • a ninth invention is the needle tube (1B) according to any one of the first invention to the eighth invention, wherein the needle tube (1B) extends at a position adjacent to the root portion (111).
  • a needle tube (1B) characterized by comprising an insertion restricting surface (118a) that intersects the direction.
  • a tenth invention is the needle tube (1, 1B, 1C) according to any one of the first invention to the ninth invention, wherein the needle tube (1, 1B, 1C) is made of PEEK resin.
  • a needle tube (1, 1B, 1C) characterized by:
  • An eleventh invention is a needle tube (1, 1B, 1C) according to any one of the first to tenth inventions, and a needle tube (1, 1B, 1C) connected to the root portion (111) of the needle tube (1, 1B, 1C). and a second needle tube (2) having a needle tube connection (201), and the second needle tube has a second tip portion ( 204).
  • a twelfth invention is a needle tube (1, 1B, 1C) according to any one of the first to tenth inventions, or a needle tube unit (3) according to the eleventh invention, and a drug container.
  • a needle (5) comprising a connected base (4).
  • a needle tube, a needle tube unit, and an injection needle that can reduce damage to the human body or the like during insertion and that are easy to manufacture.
  • FIG. Fig. 3 is a cross-sectional view of the needle tube 1 taken along the arrow AA in Fig. 2; 5 is a cross-sectional view of the injection needle 5.
  • FIG. It is the perspective view which expanded the front-end
  • FIG. It is the figure which expanded the area
  • FIG. 8 is a cross-sectional view of the vicinity of the distal end portion of the needle tube 1 taken along the arrow EE in FIG.
  • FIG. 11 is a diagram showing a first modification of the shape of the tip of the inner surface of the extension portion 125a;
  • FIG. 12 is a diagram showing a second modification of the shape of the tip of the inner surface of the extension portion 125a; It is a figure explaining the reason for providing a flat surface around the parting line PL.
  • It is a perspective view of the needle tube 1B of 2nd Embodiment. It is a side view of the needle tube 1B.
  • FIG. 15 is a cross-sectional view of the needle tube 1B taken along the arrow FF in FIG.
  • FIG. 14 It is a perspective view of 1 C of needle tubes of 3rd Embodiment. It is a side view of 1 C of needle tubes.
  • FIG. 18 is a cross-sectional view of the needle tube 1C taken along the arrow GG in FIG. 17;
  • FIG. 1 is a perspective view of the needle tube 1 of the first embodiment.
  • FIG. 2 is a side view of the needle tube 1.
  • FIG. 3 is a cross-sectional view of the needle tube 1 taken along the arrow AA in FIG.
  • FIG. 4 is a cross-sectional view of the injection needle 5.
  • FIG. 1 is a perspective view of the needle tube 1 of the first embodiment.
  • FIG. 2 is a side view of the needle tube 1.
  • FIG. 3 is a cross-sectional view of the needle tube 1 taken along the arrow AA in FIG.
  • FIG. 4 is a cross-sectional view of the injection needle 5.
  • FIG. It should be noted that the figures described below, including FIGS. is shown. Also, in the following description, specific numerical values, shapes, materials, and the like are shown and described, but these can be changed as appropriate.
  • the needle tube 1 of this embodiment is combined with a second needle tube 2 described later to form a needle tube unit 3, and further combined with a base portion 4 to form an injection needle 5 (see FIG. 4).
  • the injection needle 5 of this embodiment can be used, for example, as an injection needle of a medical injection system that is suitably used for insulin injection or the like.
  • an example of a syringe needle for a medical injection system that is suitably used for insulin injection or the like will be described as an example. or an injection needle.
  • the needle tube 1 of this embodiment is a resin needle tube produced by injection molding of resin.
  • the resin used for manufacturing the needle tube 1 can be appropriately selected depending on the application, and for example, a polycarbonate resin, a polypropylene resin, or the like can be used.
  • the needle tube 1 is preferably made of PEEK resin (polyetheretherketone), and the needle tube 1 of this embodiment is made of PEEK resin.
  • PEEK resin is excellent in mechanical strength, chemical resistance and biocompatibility, and is suitable as a material for resin-made needle tubes.
  • the needle tube 1 of this embodiment includes a root portion 111, a first conical portion 112, a second conical portion 113, a first linear portion 114, a third conical portion 115, and a second linear portion. 116 and a tip portion 117 are provided in this order from the root side.
  • the base portion 111 is a portion connected to the second needle tube 2, which will be described later.
  • the root portion 111 is formed so as to be slightly tapered toward the end portion side, and has a shape that facilitates fitting with the second needle tube 2 .
  • the first conical portion 112 is formed into a conical surface that is wider on the root portion 111 side than the root portion 111 and gradually tapers in outer diameter toward the tip portion 117 side. Since the base portion 111 side of the first conical portion 112 is wider than the base portion 111, the position relative to the second needle tube 2 is regulated to an appropriate position.
  • the second conical portion 113 is a conical portion that is located between the first conical portion 112 and the first linear portion 114 and whose outer diameter gradually decreases toward the tip portion 117 side. Unlike the conical surface of the first conical portion 112 , the second conical portion 113 is a conical body in the shape of a body of revolution in which the curve is rotated. In addition, in FIG. 1 and the like, a line is drawn on the boundary between the first conical portion 112 and the second conical portion 113 for easy understanding. Sometimes you can't. The same is true for other boundaries.
  • the first linear portion 114 is a cylindrical portion.
  • the third conical portion 115 is a conical portion that is located between the first linear portion 114 and the second linear portion 116 and whose outer diameter gradually tapers toward the tip portion 117 side.
  • the second linear portion 116 is a cylindrical portion.
  • the outer diameter of the second linear portion 116 is as small as 0.24 mm.
  • the tip portion 117 is formed in a substantially conical shape as a whole. Openings 117b are provided at two opposing positions across the distal end portion 117 and the second linear portion 116 . Details of the distal end portion 117 will be described later.
  • the flow path 120 includes, from the base portion 111 side, a first linear flow path 121, a first conical flow path 122, a second linear flow path 123, a second conical flow path 124, and a third linear flow path. 125 are provided in this order.
  • the first linear flow path 121 is provided inside the root portion 111 and is a cylindrical cavity.
  • the inner diameter of the first linear flow path 121 is 1 mm.
  • the first cone-shaped channel 122 is provided inside the first cone-shaped portion 112 and part of the second cone-shaped portion 113, and forms a truncated cone-shaped cavity that is larger on the root portion 111 side.
  • the second linear flow path 123 is provided inside a portion of the second conical portion 113 and the first linear portion 114, and forms a cylindrical cavity.
  • the inner diameter of the second straight flow path 123 is 0.1 mm.
  • the second cone-shaped flow path 124 is provided inside the third cone-shaped portion 115 and forms a truncated cone-shaped cavity that is larger on the root portion 111 side.
  • the third linear flow path 125 is provided inside the second linear portion 116 and part of the distal end portion 117, and is a cylindrical cavity.
  • the inner diameter of the third linear flow path 125 of this embodiment is 0.07 mm.
  • the second needle tube 2 is connected to the root portion 111 of the needle tube 1 to constitute the needle tube unit 3 .
  • the second needle tube 2 is a resin needle tube manufactured by injection molding a resin.
  • the resin used for manufacturing the second needle tube 2 can be appropriately selected depending on the application, and for example, polycarbonate resin, polypropylene resin, or the like can be used. Since the second needle tube 2 is not to be inserted into the human body or the like, PEEK resin may not be used. Since PEEK resin is generally expensive, the price of injection needle 5 can be suppressed by using a resin other than PEEK resin for second needle tube 2 .
  • the second needle tube 2 of the present embodiment includes a needle tube connection portion 201, a base portion connection portion 202, a tube portion 203, a second tip portion 204, a root-side channel 205, a conical channel 206, It has a distal channel 207 and an opening 208 .
  • the needle tube connecting portion 201 is a portion into which the root portion 111 of the needle tube 1 is inserted and fitted, and is formed in a substantially cylindrical shape. A fitting portion between the needle tube connecting portion 201 and the root portion 111 is joined without a gap by an adhesive in order to prevent liquid leakage.
  • the base connecting portion 202 is connected to the base 4 by fitting into the fitting hole 401 of the base 4 .
  • the fitting portion between the base connecting portion 202 and the fitting hole 401 is also joined with an adhesive without a gap in order to prevent liquid leakage.
  • the tube part 203 is a tubular part that extends linearly, and is inserted into a drug (not shown) during use.
  • the second distal end portion 204 is provided at the distal end of the tube portion 203 and has a substantially conical shape.
  • the second tip 204 is penetrated into the medicament in use.
  • the root-side channel 205 is adjacent to the needle tube connection portion 201 and communicates with the first straight channel 121 of the needle tube 1 .
  • the inner diameter of the root-side channel 205 is smaller than the inner diameter of the first linear channel 121, but they may have the same inner diameter, and the inner diameter of the root-side channel 205 is the same as that of the first straight channel. It is good also as a structure larger than the internal diameter of the channel
  • the cone-shaped channel 206 is arranged between the root-side channel 205 and the tip-side channel 207 in the base connecting portion 202, and forms a truncated cone-shaped cavity that is larger on the root-side channel 205 side.
  • the tip-side flow path 207 is provided inside the tube portion 203 and is a cylindrical cavity.
  • the opening 208 is located near the second tip 204 of the tube 203 and opens to the side of the tube 203 . During use, the drug is injected into the flow channel in the needle tube unit 3 through this opening 208 .
  • the base portion 4 is a portion to be attached to a drug cartridge (medicine container) (not shown).
  • the base part 4 is a needle tube made of resin produced by injection molding of resin.
  • the resin used for manufacturing the base portion 4 can be appropriately selected according to the application, and for example, polycarbonate resin, polypropylene resin, or the like can be used.
  • the base portion 4 has a fitting hole 401 and a screw portion 402, and is configured in a substantially cylindrical shape with one end side open.
  • the base connecting portion 202 of the second needle tube 2 is fitted into the fitting hole 401 .
  • the threaded portion 402 can be screwed into a threaded portion of a medicine cartridge (not shown), and the injection needle 5 is fixed to the medicine cartridge using this threaded portion 402, ready for use.
  • the threaded portion 402 is screwed onto the threaded portion of the medicine cartridge, the second distal end portion 204 of the second needle tube 2 is pierced toward the medicine of the medicine cartridge.
  • FIG. 5 is an enlarged perspective view of the vicinity of the distal end of the needle tube 1.
  • FIG. 6 is an enlarged view of area C in FIG.
  • FIG. 7 is an enlarged view of area D in FIG.
  • FIG. 8 is a cross-sectional view of the vicinity of the distal end portion of the needle tube 1 taken along the arrow EE in FIG.
  • FIG. 9 is an enlarged view of the vicinity of the tip portion of the needle tube 1 as viewed from the direction of arrow B in FIG.
  • the distal end portion 117 is provided with a distal curved surface portion 117a, an opening portion 117b, and an opening edge portion 117c.
  • the tip curved surface portion 117a is the tip end portion of the tip portion 117 and is configured to be rounded. In this embodiment, it is a spherical surface with a radius of 0.02 mm.
  • the tip curved surface portion 117 a is formed so as to be smoothly connected to the conical surface of the tip portion 117 . Since the tip of the needle tube 1 of this embodiment has a spherical surface as described above, it is possible to reduce injury to the human body or the like during insertion, as compared with a conventional needle tube having a sharp tip. can. With a conventional needle tube having a sharp tip, no matter how thin the tip is, the sharp tip inevitably cuts through cells, which is a heavy burden on the human body.
  • the needle tube 1 of this embodiment has a spherical surface at the distal end as described above, and is a very fine spherical surface. Therefore, the needle tube 1 is inserted into the human body or the like by pushing away the cells instead of cutting them. Therefore, it can be expected that the degree of injury to the human body or the like will be reduced, and that wounds will heal faster. Furthermore, an effect of reducing pain when the needle tube 1 is inserted can be expected.
  • the opening 117b extends across the distal end portion 117 and the second linear portion 116, is connected to the third linear flow path 125, and communicates the flow path 120 with the outside.
  • the opening 117b has a portion where a mold shape corresponding to the opening shape of the opening portion 117b and a pin-shaped mold shape (slide pin) corresponding to the internal flow path 120 abut against each other.
  • the opening is made by preventing the resin from flowing during injection molding. Therefore, post-processing or the like is unnecessary, and the opening 117b can be provided efficiently and accurately.
  • One opening 117b is arranged in each of two areas bounded by the parting line PL so as to face each other.
  • a parting line PL is provided on the outer peripheral surface and is a line along which the mold is divided during injection molding.
  • the mold for molding the needle tube 1 is divided into two directions with a parting line PL shown in FIGS. 1 and 8 as a boundary.
  • the length of the opening 117b (the length in the extending direction of the needle tube 1) in this embodiment is 0.5 mm.
  • the width of the opening 117b (the width in the direction intersecting the direction in which the needle tube 1 extends) of this embodiment is 0.05 mm.
  • the opening edge portion 117c is the edge portion of the opening portion 117b, that is, the portion that forms the conical surface of the tip portion 117 and the ridgeline between the second linear portion 116 and the opening portion 117b, and has a rounded shape. there is Damage to the human body is prevented by rounding the corners of the opening edge 117c.
  • the third linear flow path 125 is also provided inside the tip portion 117, and has an extension portion 125a that extends beyond the opening portion 117b toward the tip side.
  • Flow path 120 (121, 122, 123, 124, 125) in needle tube 1 is configured along the shape of a slide pin (not shown) provided in a mold device during injection molding of needle tube 1 . Then, in the vicinity of the tip of the third linear flow path 125, molds having a shape corresponding to the opening 117b sandwich the slide pin from both sides, thereby manufacturing the needle tube 1 with the opening 117b open.
  • the tip side is slightly tapered so that the slide pin can be easily inserted and the mold can be easily removed. It is desirable to form a tapered shape.
  • an extension portion 125a is provided, and the shape of the extension portion 125a is The inner diameter was tapered toward the tip side.
  • the shape of the inner surface of the extension portion 125a is spherical. Therefore, the inner diameter of the slide pin in this portion is similarly tapered toward the distal end side, so that the slide pin can be easily inserted and removed.
  • the shape of the extension part 125a is such that the inner diameter is tapered toward the distal end side, when injecting the medicine, part of the medicine vigorously pushed out from the root part 111 side is absorbed by the extension part. 125a is reached. Then, the medicine that has reached the extension part 125a is discharged from the opening part 117b while being diffused by the shape in which the inner diameter is tapered toward the distal end side. As a result, the ejection direction of the medicine ejected from the opening 117b can be made wider than when the extended portion 125a is not provided.
  • the slide pin at the position corresponding to the third linear flow path 125 can be formed into a complete cylindrical shape without being tapered, thereby forming a mold having a shape corresponding to the opening portion 117b. and the slide pin are configured to be in close contact with each other. Therefore, molding defects such as burrs can be suppressed, and manufacturing can be easily performed.
  • the mold having the shape corresponding to the opening 117b and the slide pin are configured to easily come into close contact with each other, the position of the mold having the shape corresponding to the opening 117b is stabilized. It is possible to form the opening 117b without the need.
  • the openings 117b are arranged one by one in each of the two areas bounded by the parting line PL, so that the slide pins are placed from both sides corresponding to the openings 117b.
  • the mold of the shape will be in close contact. As a result, even if a very thin slide pin as in this embodiment is used, the slide pin does not bend and more stable molding can be performed.
  • the needle tube 1, the needle tube unit 3, and the injection needle 5 of the present embodiment are provided with the opening 117b without providing a groove, and the corners of the opening edge 117c are rounded. It is possible to reduce damage to the human body or the like during insertion. In addition, since the needle tube 1, the needle tube unit 3, and the injection needle 5 have rounded tips, damage to the human body, etc., when the needle tube 1 is inserted can be further reduced, and the burden can be reduced. Further, since the needle tube 1, the needle tube unit 3, and the injection needle 5 of the present embodiment are provided with the extended portion 125a, a mold having a shape corresponding to the opening portion 117b and the slide pin are easily brought into close contact with each other. It can be manufactured easily and inexpensively.
  • the needle tube 1, the needle tube unit 3, and the injection needle 5 of this embodiment are provided with multiple openings 117b.
  • the opening 117b has a sufficiently large opening area as described above. Therefore, the needle tube 1 of the present embodiment has a larger opening area than a conventional metal needle tube, so that the drug or the like can be easily released, and the release position is not concentrated in one place. It can be released over a wide area. Therefore, the drug is not concentrated in one place in the body and is easily absorbed into the body more quickly.
  • the needle tube 1 of the present embodiment makes it possible to complete the administration of the drug more quickly, thereby further reducing the burden on the human body.
  • FIG. 13 is a perspective view of needle tube 1B of the second embodiment.
  • FIG. 14 is a side view of the needle tube 1B.
  • FIG. 15 is a cross-sectional view of the needle tube 1B taken along the arrow FF in FIG.
  • the needle tube 1B of the second embodiment differs from the first embodiment in that a cylindrical portion 118 is provided instead of the first conical portion 112 of the first embodiment, and the shape of the flow path 120 and the position of the opening 116a are different. It has the same configuration as the needle tube 1 of one embodiment. Therefore, portions that perform the same functions as those of the above-described first embodiment are denoted by the same reference numerals, and overlapping descriptions are appropriately omitted.
  • the columnar portion 118 is located adjacent to the root portion 111, is arranged between the root portion 111 and the second conical portion 113, and is configured in a substantially cylindrical shape.
  • An insertion restricting surface 118 a is provided on the distal end portion 117 side of the cylindrical portion 118 .
  • the insertion restricting surface 118a is a surface that intersects perpendicularly with the direction in which the needle tube 1B extends.
  • the diameter of the first linear flow path 121 is configured to be smaller than that in the first embodiment.
  • the inner diameter of the first linear flow path 121 is set to 0.5 mm.
  • a third conical channel 126 is provided instead of the third linear channel 125 in the first embodiment.
  • the third cone-shaped channel 126 is a truncated cone-shaped cavity that is larger on the root portion 111 side.
  • the inner diameter of the third conical channel 126 may be, for example, 0.14 mm on the side connected to the second conical channel 124 and 0.10 mm on the end on the tip 117 side. .
  • the inner diameter of the third conical channel 126 is, for example, 0.11 mm on the side connected to the second conical channel 124 and 0.07 mm on the end on the tip 117 side. can be done. Note that these inner diameters can be changed as appropriate.
  • An extension portion 125a is provided on the distal end side of the third cone-shaped channel 126, as in the first embodiment.
  • a root cone-shaped channel 121 a is provided at the end of the channel 120 on the side of the root part 111 .
  • the root conical channel 121a is connected to the first linear channel 121 and provided at the end of the channel 120, and is formed in a conical inner surface shape (funnel shape) that widens toward the end. Further, in the second embodiment, the opening 116 a is provided in the second linear portion 116 .
  • the insertion restricting surface 118a is provided, when the needle tube 1B is inserted into the human body, the insertion restricting surface 118a abuts against the skin and the needle tube 1B is inserted into the human body more than necessary. can be prevented. Further, in the second embodiment, since the cylindrical portion 118 is provided, the needle tube 1B can be easily grasped by tweezers, a robot hand (end effector), or the like, and the assembly can be facilitated.
  • FIG. 16 is a perspective view of needle tube 1C of the third embodiment.
  • FIG. 17 is a side view of the needle tube 1C.
  • FIG. 18 is a cross-sectional view of the needle tube 1C taken along the arrow GG in FIG. 1 C of needle tubes of 3rd Embodiment abbreviate
  • the point which extended the 1st linear part 114 to the insertion control surface 118a, and the adhesive agent pool 111a It has the same configuration as the needle tube 1B of the second embodiment except that it is provided. Therefore, portions that perform the same functions as in the above-described second embodiment are denoted by the same reference numerals, and overlapping descriptions are omitted as appropriate.
  • the first linear portion 114 extends to the insertion restricting surface 118a. That is, there is no shape corresponding to the second conical portion 113 in the needle tube 1B of the second embodiment. Therefore, even when the needle tube 1C is inserted into the human body until the insertion restricting surface 118a abuts on the skin, the amount of pushing out the human tissue is small, and damage to the human body can be reduced. can reduce pain.
  • the adhesive reservoir 111a is formed by making part of the outer peripheral surface of the root portion 111 a flat surface. Since the needle tube 1C of the third embodiment has the adhesive reservoir 111a, the adhesive can be easily handled when connecting to the second needle tube 2 and the base portion 4, and the adhesive strength is increased. can increase Also, a gate can be provided in the adhesive pool 111a.
  • the tip shape of the inner surface of the extension portion 125a is described as being spherical.
  • the shape of the tip of the inner surface of the extension portion 125a is not limited to this, and may be another shape in which the inner diameter tapers toward the tip side.
  • FIG. 10 is a diagram showing a first modification of the tip shape of the inner surface of the extension portion 125a.
  • the tip shape of the inner surface of the extension part 125a may have a tapered side surface.
  • FIG. 11 is a diagram showing a second modified form of the tip shape of the inner surface of the extension portion 125a.
  • the tip shape of the inner surface of the extension portion 125a may be conical.
  • FIG. 12 is a diagram explaining the reason why the flat surface is provided around the parting line PL.
  • FIG. 12(a) shows a form in which no flat surface is provided around the parting line PL
  • FIG. 12(b) shows a form in which a flat surface 130 is provided.
  • FIG. 12 needle tube 1 molded in a state in which the left and right mold positions are displaced is shown exaggeratedly in a cross section perpendicular to flow path 120 .
  • the corner portion indicated by the arrow T1 is formed at an acute angle rather than a right angle.
  • the corner portion indicated by the arrow T2 is formed at a right angle. Therefore, even if the mold position is misaligned, the provision of the flat surface 130 does not produce a portion that is formed at an angle that is sharper than a right angle, and can reduce damage to the human body.
  • the tip curved surface portion 117a has been described as being spherical. Not limited to this, for example, the shape of the tip curved surface portion may be a spheroidal surface or the like, or may be another curved surface as long as it is rounded and smoothly connected to the conical surface at the tip.
  • an injection needle of a medical injection system that is suitably used for insulin injection or the like has been described by citing an example in which the injection needle is used by being connected to a drug cartridge with a screw portion.
  • the injection needle of the present invention may be used as an injection needle for use in an injector using a general syringe.
  • the needle tube 1 can be directly connected to the base portion 4 .
  • the shape of the portion connecting the base portion 4 to the syringe can also be appropriately changed according to the shape of the syringe.
  • the number of openings may be three, or four or more.
  • the position where the opening is provided is not limited to the tip, and may be provided at any position between the tip and the base.
  • the insertion restricting surface 118a is provided on the columnar portion 118 .
  • the insertion restricting surface may be formed in a flange-shaped (brim-shaped) portion.
  • Root part 111a Adhesive reservoir 112 First conical part 113 Second conical part 114 First linear part 115 Third conical part Portion 116 Second linear portion 116a Opening 117 Tip 117a Tip curved surface 117b Opening 117c Opening edge 118 Cylindrical portion 118a Insertion restricting surface 120 Channel 121 First straight channel 121a Conical channel 122 First Conical channel 123 Second linear channel 124 Second conical channel 125 Third linear channel 126 Third conical channel 125a Extension part 201 Needle tube connection part 202 Base part connection part 203 Tube part 204 Second tip Part 205 Root-side channel 206 Conical channel 207 Tip-side channel 208 Opening 401 Fitting hole 402 Threaded portion

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  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

L'objectif de la présente invention est de fournir un tube d'aiguille, un ensemble tube d'aiguille et une aiguille à injection avec lesquels il est possible de réduire les lésions au niveau du corps humain, etc., pendant l'insertion.　Selon la présente invention, un tube d'aiguille 1 est constitué d'une résine et utilisé pour une aiguille à injection 5, le tube d'aiguille 1 comprenant : une partie de base 111 ; une partie pointe du côté opposé à la partie de base ; un passage 120 formé à l'intérieur ; et une pluralité d'ouvertures 117b s'ouvrant entre la partie pointe 117 et la partie de base 111, la pluralité d'ouvertures 117b assurant la communication entre le passage 120 et l'extérieur. Le passage 120 comprend une partie d'extension 125a s'étendant au-delà des ouvertures 117b en direction du côté pointe.
PCT/JP2022/006891 2021-02-25 2022-02-21 Tube d'aiguille, ensemble tube d'aiguille et aiguille à injection WO2022181527A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024095831A1 (fr) * 2022-10-31 2024-05-10 株式会社タスク Aiguille d'injection

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58101009A (ja) * 1981-09-24 1983-06-16 Seikosha Co Ltd 合成樹脂軸の成形装置
JP2000042106A (ja) * 1999-08-02 2000-02-15 Terumo Corp 薬液混合用注射器
WO2017057476A1 (fr) * 2015-09-29 2017-04-06 テルモ株式会社 Aiguille creuse en résine médicale, ensemble d'instrumentation médicale l'utilisant, et cylindre externe muni d'une pièce de ponction
JP2017148464A (ja) * 2016-02-23 2017-08-31 三島金型株式会社 流体注出注入器
WO2017164231A1 (fr) * 2016-03-23 2017-09-28 テルモ株式会社 Bouchon en caoutchouc pour récipient de médicament, récipient de médicament destiné à recevoir un médicament et ensemble récipient de médicament

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58101009A (ja) * 1981-09-24 1983-06-16 Seikosha Co Ltd 合成樹脂軸の成形装置
JP2000042106A (ja) * 1999-08-02 2000-02-15 Terumo Corp 薬液混合用注射器
WO2017057476A1 (fr) * 2015-09-29 2017-04-06 テルモ株式会社 Aiguille creuse en résine médicale, ensemble d'instrumentation médicale l'utilisant, et cylindre externe muni d'une pièce de ponction
JP2017148464A (ja) * 2016-02-23 2017-08-31 三島金型株式会社 流体注出注入器
WO2017164231A1 (fr) * 2016-03-23 2017-09-28 テルモ株式会社 Bouchon en caoutchouc pour récipient de médicament, récipient de médicament destiné à recevoir un médicament et ensemble récipient de médicament

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024095831A1 (fr) * 2022-10-31 2024-05-10 株式会社タスク Aiguille d'injection

Also Published As

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