WO2020235604A1 - Piston de seringue à quantité fixe et seringue à quantité fixe - Google Patents

Piston de seringue à quantité fixe et seringue à quantité fixe Download PDF

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Publication number
WO2020235604A1
WO2020235604A1 PCT/JP2020/019985 JP2020019985W WO2020235604A1 WO 2020235604 A1 WO2020235604 A1 WO 2020235604A1 JP 2020019985 W JP2020019985 W JP 2020019985W WO 2020235604 A1 WO2020235604 A1 WO 2020235604A1
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WO
WIPO (PCT)
Prior art keywords
plunger
flange
injection tube
plane
ratchet
Prior art date
Application number
PCT/JP2020/019985
Other languages
English (en)
Japanese (ja)
Inventor
幸雄 川嶋
透 藤澤
Original Assignee
株式会社タスク
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 株式会社タスク filed Critical 株式会社タスク
Publication of WO2020235604A1 publication Critical patent/WO2020235604A1/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
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms

Definitions

  • the present invention relates to a plunger for a fixed-quantity injection tube capable of discharging a fixed amount of a drug solution filled in an injection tube, and a fixed-quantity injection tube using the plunger for the fixed-quantity injection tube.
  • a finger grip attached to a syringe includes an engaging member, and a radial direction is provided between a non-acting position where the engaging member is not engaged with the plunger rod and an acting position where the engaging member engages with the grooved surface of the plunger rod. Movable finger grips are listed.
  • an object of the present invention is to provide a plunger for a fixed-quantity injection tube and a plunger for a fixed-quantity injection tube using a plunger for a fixed-quantity injection tube, which has few components, a simple structure, and easy to assemble a fixed-quantity injection tube.
  • the plunger for a quantitative injection tube has a plunger body having an elongated shape and having ratchet teeth extending in the longitudinal direction in a first region on the outer periphery of the elongated shape, and the above-mentioned It has a through hole into which the plunger body is inserted, and includes a claw portion in which the inner surface of the through hole engages with the ratchet teeth to form a ratchet mechanism, and a flange having a plunger support portion for supporting the plunger.
  • the plunger body comprises a first plane extending in the longitudinal direction in a second region on the outer periphery of the elongated shape, and the plunger support comprises a second plane facing the plunger.
  • the ratchet teeth are arranged to engage the claws, and the plunger body is lower at the end of the ratchet teeth than the base of the ratchet teeth.
  • a quantitative injection having a region, in which the plunger body can rotate with respect to the flange by entering a region lower than the base portion of the ratchet tooth and disengaging the ratchet tooth and the claw portion. It is a plunger for a cylinder.
  • (A) is a schematic side view showing a state in which the plunger main body is rotated and moved in the axial direction
  • (c) is a sectional view taken along line BB of a plunger for a fixed-quantity injection tube. is there.
  • a partially enlarged view showing a state in which the plunger body according to the first embodiment of the present invention is pushed against the flange and the ratchet mechanism is disengaged, and (b) the ratchet mechanism is disengaged and rotated. It is a partially enlarged view which shows the state which made it made.
  • FIG. 1 It is a schematic perspective view which attaches the plunger for a quantitative injection cylinder which concerns on 1st Embodiment of this invention to a syringe with a flange cover.
  • a cross-sectional view showing an injection needle formed by attaching a plunger for a quantitative injection tube according to the first embodiment of the present invention to a syringe together with a flange cover to form an injection tube, and attaching a needle portion to the injection tube. is there.
  • FIG. 1 is a schematic perspective view (a) and a side view (b) of a part of a plunger for a fixed-quantity injection tube according to the first embodiment of the present invention in cross section.
  • FIG. 6 is a cross-sectional view showing an injection tube using a plunger for a quantitative injection tube according to the first embodiment of the present invention. An overview of the plunger for a quantitative injection tube of the present invention will be described with reference to FIGS. 1 and 6.
  • the plunger 1039 for a quantitative injection tube of the present invention includes a plunger main body 1001 and a flange 1005.
  • the flange 1005 has a through hole into which the plunger body 1001 is inserted, and as shown in FIG. 6, the flange 1005 is fixed to the syringe 1029 in a state where the plunger body 1001 is inserted into the syringe 1029 for quantitative injection.
  • a cylinder 1041 is formed.
  • a syringe is formed by attaching the needle portion 1035 to the syringe 1029 of the metering syringe 1041.
  • the plunger body 1001 has an elongated shape because the user pushes the syringe 1029 toward the needle portion 1035 and discharges the chemical solution in the syringe 1029 from the needle portion 1035.
  • the plunger body 1001 includes ratchet teeth 1003 extending in the longitudinal direction in a first region on the outer circumference of the elongated shape.
  • the ratchet teeth 1003 are inclined so that when the plunger body 1001 is attached to the syringe 1029, the plunger body 1001 can move only in the direction of pushing the plunger body 1001 toward the needle portion 1035.
  • a fixed amount of chemical solution can be discharged. That is, it can be finely quantified at intervals of ratchet teeth 1003.
  • the direction in which the plunger body 1001 operates in order to discharge the chemical solution is pushed into the flange 1005, and the direction in which the plunger body 1001 is moved is pushed into the flange 1005.
  • the direction opposite to the pushing direction is the direction of pulling out from the flange 1005, and moving in that direction is pulling out from the flange 1005.
  • the plunger body 1001 is provided with a gasket 1009 at the tip on the syringe side in the long axis direction.
  • the gasket 1009 ensures a seal between the syringe 1029 and the plunger body 1001.
  • the gasket 1009 can be replaced according to the size of the diameter of the syringe 1029.
  • the flange 1005 is provided with a through hole 1007 into which the plunger body 1001 is inserted.
  • the through hole 1007 supports and guides the plunger body 1001.
  • the axial length of the through hole 1007 is preferably, but not limited to, a length that can support and guide the plunger main body 1001.
  • the flange 1005 is preferably made of a material that can be loosely elastically deformed, for example, plastic or resin.
  • FIG. 2 is a schematic side sectional view (a), a sectional view taken along the line AA, and (c) a partially enlarged view of the ratchet mechanism of the plunger for a quantitative injection tube according to the first embodiment of the present invention.
  • the ratchet mechanism of the plunger for a quantitative injection tube of the present invention will be described with reference to FIG.
  • the flange 1005 includes a claw portion 1011 in which the inner surface of the through hole 1007 of the flange engages with the ratchet teeth 1003. Due to the inclination angle of the tooth provided on the ratchet tooth 1003, the claw portion 1011 elastically deforms in one direction and moves along the ratchet tooth 1003. On the other hand, in the opposite direction, the claw portion 1011 cannot move while being in contact with the ratchet tooth 1003. In this way, the plunger body 1001 constitutes a ratchet mechanism together with the flange 1005.
  • the flange 1005 includes a first plunger support portion 1013 and a second plunger support portion 1015 that support the plunger main body 1001 on the inner surface of the through hole 1007 of the flange.
  • the plunger support portions 1013 and 1015 can support and guide the plunger main body 1001 in the through hole 1007 by contacting the plunger main body 1001.
  • the plunger body 1001 includes a first plane 1017 extending in the long axis direction in a second region on the outer circumference. Further, the first plunger support portion 1013 includes a second plane 1019 facing the first plane 1017 of the plunger main body 1001. When the first plane 1017 comes into contact with the second plane 1019, the ratchet teeth 1003 are arranged to engage the claw portion 1011.
  • the plunger main body 1001 includes a third plane 1021 extending in the long axis direction in a third region on the outer circumference.
  • the second plunger support portion 1015 includes a fourth plane 1023 facing the third plane 1021 of the plunger body 1001. Then, when the first plane 1017 is in contact with the second plane 1019, the third plane 1021 is arranged so as to be in contact with the fourth plane 1023.
  • the ratchet teeth 1003, the first plane 1017, and the third plane 1021 are arranged at positions roughly equally divided on the outer periphery of the plunger main body 1001.
  • a claw portion 1011 and a first plunger support portion 1013 (second plane 1019) and a second plunger support portion 1015 (fourth plane 1023) are outlined. It is placed in an evenly divided position. That is, the plunger body 1001 has a substantially regular hexagon in a cross section perpendicular to the major axis direction.
  • the ratchet tooth 1003 includes the first side of the cross section of the substantially regular hexagon, the first plane 1017 includes the third side of the cross section of the substantially regular hexagon, and the third plane 1021 includes the substantially regular hexagon. Includes the fifth side of the cross section of.
  • the arrangement of the three members on the circumference is not limited to roughly equal division, and other as long as the angular positions of the three members on the plunger body 1001 side and the through hole 1007 side of the flange are substantially the same. Any angle arrangement can be adopted.
  • the second flat surface 1019 of the first plunger support portion 1013 is in contact with the first flat surface 1017 of the plunger main body 1001, and the fourth flat surface 1023 of the second plunger support portion 1015 is the plunger main body 1001.
  • the through hole 1007 of the flange 1005 supports and guides the plunger body 1001.
  • the plunger support portions 1013 and 1015 prevent the plunger main body 1001 from rotating with respect to the flange 1005.
  • the ratchet tooth 1003 can maintain the engagement with the claw portion 1011 and the ratchet mechanism can be reliably functioned.
  • the claw portion 1011 is further provided with wall portions 1012 on both side surfaces.
  • the wall portion 1012 has a square tip, unlike the claw portion 1011 having a sharp tip. Since the ratchet teeth 1003 cannot get over the claw portion 1011 in the direction perpendicular to the traveling direction by the wall portion 1012, the ratchet teeth 1003 move along the claw portion 1011 and the rotation of the plunger body 1001 is suppressed.
  • the tip of the wall portion 1012 can have a rounded shape as long as the movement of the ratchet teeth 1003 can be restricted, in addition to the square shape.
  • the plunger support portion includes a first plunger support portion 1013 and a second plunger support portion 1015, but one support portion may also be provided. Further, a third plunger support portion may be further provided.
  • the cross section of the plunger body 1001 may have an arc in addition to the regular hexagon, except for the ratchet teeth 1003, the first plane 1017, and the third plane 1021. Further, the cross section of the plunger main body 1001 may be a polygon of pentagon or more.
  • FIG. 3A is a schematic side view showing a state in which the plunger body according to the first embodiment of the present invention is pushed against the flange and rotated, and is a schematic side view with a partial cross section
  • 3 (a) is a schematic side view showing a state in which the plunger main body shown in FIG. 3 (a) is rotated and moved in the axial direction
  • FIG. 3 (c) is a schematic side view of a plunger for a quantitative injection tube.
  • FIGS. 3 and 4 are partially enlarged views showing a state in which the plunger body according to the first embodiment of the present invention is pushed against the flange and (a) the ratchet mechanism is disengaged, and (b) the ratchet mechanism is engaged. It is a partially enlarged view which shows the state which was removed and rotated. With reference to FIGS. 3 and 4, the release of the ratchet mechanism of the plunger for a quantitative injection tube of the present invention will be described.
  • a region 1024 that is, a groove portion lower than the base portion of the ratchet tooth is provided at the end in the long axis direction of the ratchet tooth.
  • the plunger body 1001 uses the plunger body 1001 as a flange.
  • the end of the ratchet tooth 1003 in the long axis direction is provided with a region 1025 (groove portion) lower than the base portion of the ratchet tooth.
  • the region 1024, 1025 (groove portion) lower than the base portion of the ratchet tooth may be longer than the wall portion 1012 of the claw portion 1011 and may extend in a certain range in the longitudinal direction.
  • the plunger body 1001 is not restrained by the plunger support portions 1013 and 1015. Further, the wall portion 1012 of the claw portion 1011 fits in the region 1025 lower than the base portion of the ratchet tooth. Therefore, as shown in FIG. 4B, the plunger support portions 1013 and 1015 are no longer restrained, and the wall portion 1012 of the claw portion 1011 fits in the region 1025 lower than the base portion of the ratchet tooth, so that the claw portion 1011 is loose. It can rotate by elastic deformation.
  • the plunger body 1001 when the plunger body 1001 is rotated with respect to the flange 1005 after the ratchet teeth 1003 and the claw portion 1011 are disengaged, the plunger body 1001 with respects the flange 1005. Can move in the long axis direction. As a result, the plunger body 1001 detached from the ratchet mechanism can be detached from the ratchet mechanism and pulled out from the flange 1005.
  • the ratchet teeth 1003 are arranged between the claw portion 1011 and the plunger support portions 1013 and 1015 in the circumferential direction of the flange 1005, so that the ratchet teeth 1003 and the claw portion 1011 are separated from each other. Disengaged.
  • the first plane 1017 of the plunger body 1001 is not in contact with the second plane 1019 of the first plunger support portion 1013.
  • the third plane 1021 of the plunger main body 1001 is not in contact with the fourth plane 1023 of the second plunger support portion 1015.
  • the plunger body 1001 when the plunger body is pulled out from the flange, the claw portion 1011 hits the protrusion 1026 of the plunger body. At this position, the claw portion 1011 comes to a region 1024 (groove) lower than the base portion of the ratchet tooth.
  • the plunger body 1001 when the plunger body 1001 is rotated, the claw portion 1011 fits in the region 1024 lower than the base portion of the ratchet tooth, so that the claw portion 1011 can rotate with a loose elastic deformation.
  • the ratchet teeth 1003 can be engaged with the claw portion 1011 again. Then, as shown in FIG. 1, the plunger main body 1001 and the flange 1005 can be returned to the initial positions.
  • the plunger for a fixed-quantity injection tube is provided with a mechanism for pushing it in by a ratchet mechanism and then returning it to its original position, so that it can be reused as many times as necessary without being thrown away.
  • FIG. 5 is a schematic perspective view from a first direction in which the plunger for a metering syringe according to the first embodiment of the present invention is attached to a syringe with a flange cover.
  • FIG. 6 shows an injection needle formed by attaching a plunger for a quantitative injection tube according to the first embodiment of the present invention to a syringe together with a flange cover to form an injection tube, and attaching a needle portion to the injection tube. It is sectional drawing which shows.
  • FIG. 7 is a schematic perspective view of an injection needle formed by attaching a needle portion to a quantitative injection cylinder according to the first embodiment of the present invention.
  • the fixed-quantity injection tube in which the plunger for the fixed-quantity injection tube of the present invention is attached to the syringe will be described with reference to FIGS. 5 to 7.
  • the quantitative injection tube 1041 in which the plunger for the quantitative injection tube of the present invention is assembled into the injection tube includes a plunger main body 1001 into which the flange 1005 is inserted and a flange cover 1027.
  • the quantitative injection tube 1041 of the present invention includes a syringe 1029.
  • the syringe 1029 includes a flange portion 1031.
  • the plunger body 1001 is attached to the syringe 1029 by sandwiching and fixing the flange portion 1031 of the syringe 1029 between the flange 1005 into which the plunger body 1001 is inserted and the flange cover 1027.
  • the flange cover 1027 may be assembled from the long axis direction when assembling into the metering injection cylinder 1041, or may be divided in the long axis direction and assembled by sandwiching the syringe 1029 vertically from the long axis direction.
  • the flange 1005 and the flange cover 1027 are provided with a member 1033 made of a urethane material at least in part. Since the urethane material can be easily deformed, the flange 1005 and the flange cover 1027 can be attached to the flange 1029 regardless of the shape of the flange portion 1031 of the syringe 1029.
  • the quantitative injection tube 1041 of the present invention includes a gasket 1009 that secures a seal between the syringe 1029 and the plunger body 1001.
  • the quantitative injection tube 1041 of the present invention includes a plunger for a quantitative injection tube including a plunger main body 1001 and a flange 1005, a syringe 1029, and a gasket 1009. Thereby, it can be used for a fixed-quantity injection tube for injecting and injecting a drug solution.
  • the quantitative injection cylinder 1041 of the present invention includes a plunger main body 1001, a syringe 1029, and a grip portion 1037 in which a flange 1005 and a flange cover 1027 are integrated.
  • the grip portion 1037 is a portion that the user grips when pushing the plunger body 1001 into the syringe 1029.
  • the grip portion 1037 has a substantially circular shape. Since the grip portion 1037 is circular, the plunger body 1001 can be pushed into the syringe 1029 from any circumference of 360 °.
  • the plunger for a fixed-quantity injection tube which has few components, a simple structure, and easy to assemble a fixed-quantity injection tube. Further, since the plunger for a fixed-quantity injection tube of the present invention is provided with a mechanism for pushing it in by a ratchet mechanism and then returning it to its original position, it can be reused many times without being thrown away.
  • FIG. 8 shows (a) a schematic side sectional view, (b) a partially enlarged sectional view, and (c) CC of FIG. 8 (a) of the plunger for a quantitative injection tube according to the second embodiment of the present invention. It is a cross-sectional enlarged view.
  • a plunger for a quantitative injection tube according to a second embodiment having a modified example of the ratchet mechanism of the present invention will be described with reference to FIG.
  • the plunger for a quantitative injection tube of the present embodiment is different from the first embodiment in that it has two ratchet mechanisms and can finely adjust the quantitative quantity.
  • the plunger for a quantitative injection tube includes a first ratchet tooth 2003 and a second ratchet tooth 2005 in the plunger main body 2001. Further, the flange 2007 is provided with a first claw portion 2009 and a second claw portion 2011.
  • the first claw portion 2009 engages with the first ratchet tooth 2003
  • the second claw portion 2011 engages with the second ratchet tooth 2005.
  • the first ratchet tooth 2003 and the second ratchet tooth 2005 are formed alternately in the pushing direction (major axis direction), and the second ratchet tooth 2005 is formed between the teeth of the first ratchet tooth 2003. I have teeth. If the tooth of the second ratchet tooth 2005 is provided so as to be located in the center between the teeth of the first ratchet tooth 2003, the quantification can be performed with twice the fineness of the first ratchet tooth 2003.
  • the first claw portion 2009 and the second claw portion 2011 may be at different positions as shown in the longitudinal direction, or may be at the same position.
  • the first claw portion 2009 gets over one tooth of the first ratchet tooth 2003
  • the second claw portion 2011 hits the tooth of the second ratchet tooth 2005, and also in the first claw portion 2009.
  • the plunger main body 2001 of this embodiment has a regular hexagonal shape.
  • the first ratchet tooth 2003 extends in the longitudinal direction in the first region on the outer circumference.
  • the second ratchet tooth 2005 extends in the longitudinal direction in the second region on the outer circumference.
  • the first ratchet tooth 2003 is located opposite to the second ratchet tooth 2005.
  • the flange 2007 includes a first plunger support portion 2013 and a second plunger support portion 2015.
  • the first plunger support portion 2013 is located opposite to the second plunger support portion 2015.
  • the plunger body 2001 includes a first plane 2017 extending in the long axis direction in a third region on the outer circumference. Further, the first plunger support portion 2013 includes a first curved surface 2019 facing the first plane 2017 of the plunger main body 2001. The plunger body 2001 includes a second plane 2021 extending in the longitudinal direction in a fourth region on the outer circumference. Further, the second plunger support portion 2015 includes a second curved surface 2023 facing the second plane 2021 of the plunger main body 2001. Then, when the first plane 2017 faces the first curved surface 2019 and the second plane 2021 faces the second curved surface 2023, the first ratchet teeth 2003 engage with the first claw portion 2009. , The second ratchet tooth 2005 is arranged to engage the second claw portion 2011.
  • the first plunger support portion 2013 and the second plunger support portion 2015 are not fixed. However, due to the presence of the first plunger support portion 2013 and the second plunger support portion 2015 protruding from the flange 2007, the plunger body 2001 tries to rotate, and the first plunger support portion 2013 or the second plunger support portion 2013 Contact any of the 2015 vertices. Therefore, the plunger main body 2001 is supported in the through hole by the plunger support portions 2013 and 2015, and the rotation is suppressed.
  • wall portions may be provided on the first claw portion and the second claw portion to suppress rotation.
  • the rotation mechanism for releasing the ratchet mechanism of the present embodiment after pushing the plunger body 2001 against the flange 2007 is that there are two ratchet mechanisms and the first embodiment and the rotation direction is fixed. different.
  • first claw portion 2009 and the second claw portion 2011 in the major axis direction are different, from the base portion of the ratchet tooth of the first ratchet tooth 2003 and the second ratchet tooth 2005.
  • the position of the low region (groove) in the long axis direction is also different.
  • the grooves of the first ratchet tooth 2003 and the second ratchet tooth 2005 may partially overlap in the major axis direction. Regions below the base of the ratchet tooth are at the longitudinal anterior and posterior ends of the first ratchet tooth 2003 and at the longitudinal anterior and posterior ends of the second ratchet tooth 2005.
  • the first claw portion 2009 enters a region lower than the base portion of the ratchet tooth of the first ratchet tooth 2003, and the second claw portion 2011 enters a region lower than the base portion of the second ratchet tooth 2005.
  • the plunger body 2001 can rotate with respect to the flange 2007.
  • the first plunger support portion 2013 has a first curved surface 2019, the second plunger support portion 2015 has a second curved surface 2023, and the first plunger support portion Since the 2013 and the second plunger support portion 2015 and the plunger body 2001 are not completely fixed, the plunger body 2001 can rotate due to the loose elastic deformation of the flange 2007.
  • the first ratchet tooth 2003 enters between the first claw portion 2009 and the first plunger support portion 2013, and the second ratchet tooth 2005 It is a direction to enter between the second claw portion 2011 and the second plunger support portion 2015.
  • the plunger main body 2001 is pulled out from the flange 2007, and when the first claw portion 2009 hits the protrusion of the plunger main body, the plunger main body 2001 is again attached to the flange 2007. And rotate.
  • the first claw portion 2009 enters the groove portion of the first ratchet tooth 2003
  • the second claw portion 2011 enters the groove portion of the second ratchet tooth, so that the plunger body 2001 has the first claw with respect to the flange 2007.
  • the portion 2009 and the second claw portion 2011 can be rotated by a slight elastic deformation and can be returned to their original positions.
  • the plunger for a fixed-quantity injection tube is provided with a mechanism for pushing it in by a ratchet mechanism and then returning it to its original position, so that it can be reused as many times as necessary without being thrown away.
  • the plunger body 2001 is not limited to a regular hexagon, but may be a regular octagon larger than a hexagon or any other even polygon. Further, the number of ratchet teeth is not limited to two, and may be three or more. In that case, more detailed quantification can be performed.
  • the plunger for a quantitative injection tube according to the second embodiment of the present invention can perform a small amount of quantitative injection. Further, since the plunger for a fixed-quantity injection tube according to the second embodiment of the present invention is provided with a mechanism for pushing it in by a ratchet mechanism and then returning it to its original position, it can be reused as many times as necessary without being thrown away.
  • FIG. 9 is a schematic perspective view of mounting the plunger for a metering syringe according to the first embodiment of the present invention on a syringe with a flange cover having a boss.
  • a modified example of mounting the plunger for a quantitative injection tube of the present invention on the injection tube will be described with reference to FIG.
  • the quantitative injection tube 3041 in which the plunger for the quantitative injection tube of the present invention is assembled into the injection tube includes a plunger main body 3001 into which the flange 3005 is inserted and a flange cover 3027.
  • the quantitative injection tube 3041 of the present invention includes a syringe 3029.
  • the syringe 3029 includes a flange portion 3031.
  • the plunger body 3001 is attached to the syringe 3029 by sandwiching and fixing the flange portion 3031 of the syringe 3029 between the flange 3005 into which the plunger body 3001 is inserted and the flange cover 3027.
  • the flange cover 3027 includes four bosses 3033.
  • the flange portion 3031 is fixed by the boss 3033, and the syringe 3029 is fixed to the flange cover 3027.
  • the flange 3005 may be provided with a member made of a urethane material so that the flange 3005 can be applied to a flange portion 3031 having a certain size.
  • the present invention can be used for injection and injection using an injection tube that requires quantification of a drug solution or the like.

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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

En vue de fournir un piston de seringue à quantité fixe de structure non compliquée, l'invention concerne un piston de seringue à quantité fixe 1039 pourvu de : un corps de piston 1001 qui a une forme allongée et qui est équipé de dents d'encliquetage 1003 s'étendant dans la direction d'axe long à l'intérieur d'une première région sur la circonférence externe de la forme allongée ; et une bride 1005 dans laquelle est formé un trou traversant 1007 pour permettre l'insertion du piston à travers celui-ci, et qui est équipé d'un cliquet 1011 dans lequel la surface interne du trou traversant vient en prise avec une dent d'encliquetage de façon à constituer un mécanisme d'encliquetage, et avec un support de piston 1013 pour supporter le piston, le piston étant équipé d'une première surface plate 1017 qui s'étend dans la direction d'axe long à l'intérieur d'une seconde région sur la circonférence externe de la forme allongée, le support de piston étant équipé d'une seconde surface plate 1019 qui fait face au piston, et les dents d'encliquetage étant disposées de telle sorte que l'une des dents d'encliquetage vient en prise avec le cliquet lorsque la première surface plate vient en contact avec la seconde surface plate.
PCT/JP2020/019985 2019-05-20 2020-05-20 Piston de seringue à quantité fixe et seringue à quantité fixe WO2020235604A1 (fr)

Applications Claiming Priority (2)

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JP2019-094494 2019-05-20
JP2019094494A JP7344535B2 (ja) 2019-05-20 2019-05-20 定量注射筒用プランジャ及び定量注射筒

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WO2020235604A1 true WO2020235604A1 (fr) 2020-11-26

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Publication number Priority date Publication date Assignee Title
US11911598B2 (en) 2021-08-18 2024-02-27 Jmbiotech Co., Ltd. Device for injecting fixed quantity of liquid medicine
WO2023022245A1 (fr) * 2021-08-18 2023-02-23 (주)제이엠바이오텍 Dispositif d'injection en quantité fixe de fluide médicinal

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JP2014513595A (ja) * 2011-03-17 2014-06-05 ベクトン・ディキンソン・アンド・カンパニー 回転可能なラチェットプランジャを備える医療用インジェクタ
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JP2013506467A (ja) * 2009-09-30 2013-02-28 サノフィ−アベンティス・ドイチュラント・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング 薬物送達デバイス用の再設定可能な駆動機構
JP2014513595A (ja) * 2011-03-17 2014-06-05 ベクトン・ディキンソン・アンド・カンパニー 回転可能なラチェットプランジャを備える医療用インジェクタ
JP2012210966A (ja) * 2011-03-31 2012-11-01 Gc Corp クリック音機能付ダブルシリンジ
US20170354791A1 (en) * 2015-02-10 2017-12-14 Gad Lewkonya Safe auto-needle device

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