WO2020235604A1 - Fixed-quantity syringe plunger and fixed-quantity syringe - Google Patents

Fixed-quantity syringe plunger and fixed-quantity syringe 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
French (fr)
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/en

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Classifications

    • 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.

Abstract

With a view to providing a fixed-quantity syringe plunger of uncomplicated structure, provided is a fixed-quantity syringe plunger 1039 provided with: a plunger body 1001 that has an elongate shape and is equipped with ratchet teeth 1003 extending in the long axis direction within a first region on the outer circumference of the elongate shape; and a flange 1005 that has formed therein a through-hole 1007 for allowing the plunger to be inserted therethrough, and that is equipped with a pawl 1011 in which the inner surface of the through-hole engages a ratchet tooth so as to constitute a ratchet mechanism, and with a plunger support 1013 for supporting the plunger, wherein the plunger is equipped with a first flat surface 1017 that extends in the long axis direction within a second region on the outer circumference of the elongate shape, the plunger support is equipped with a second flat surface 1019 that faces the plunger, and the ratchet teeth are disposed such that one of the ratchet teeth engages the pawl when the first flat surface contacts the second flat surface.

Description

定量注射筒用プランジャ及び定量注射筒Plunger for fixed-quantity injection tube and fixed-quantity injection tube
　本発明は、注射筒に充填された薬液を一定量だけ吐出させることができる定量注射筒用プランジャ及びこの定量注射筒用プランジャを用いた定量注射筒に関する。 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.
　医療分野では、患者に薬物を、注射筒を使って投与する際、ある一定量を投与することがなされている。この一定量を正確に量るためにシリンジやプランジャに様々な構造を付すことがなされている。 In the medical field, when a drug is administered to a patient using an injection tube, a certain amount is administered. Various structures are attached to syringes and plungers in order to accurately measure this constant amount.
　特許文献１では、シリンジにつけるフィンガーグリップが係合部材を備え、この係合部材がプランジャロッドに係合されない非作用位置とプランジャロッドの溝付き表面と係合する作用位置の間を半径方向に移動可能であるフィンガーグリップが記載されている。 In Patent Document 1, 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.
特許第６４０１２３９号Patent No. 6401239
　しかしながら、このようなフィンガーグリップは、構成部材が多く、構造が複雑でシリンジやプランジャとの組立てが容易でなかった。そこで、本発明は、構成部材が少なく、構造が簡単で、定量注射筒の組み立てが容易な定量注射筒用プランジャ及び定量注射筒用プランジャを用いた定量注射筒を提供することを課題とする。 However, such a finger grip has many components, the structure is complicated, and it is not easy to assemble with a syringe or a plunger. Therefore, 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.
　本発明の１つの実施形態に係る定量注射筒用プランジャは、細長い形状を有し、前記細長い形状の外周上の第１の領域で長軸方向に延在するラチェット歯を備えるプランジャ本体と、前記プランジャ本体が挿入される貫通孔を有し、前記貫通孔の内面が前記ラチェット歯と係合してラチェット機構を構成する爪部及び前記プランジャを支持するプランジャ支持部を備えるフランジと、を備え、前記プランジャ本体は、前記細長い形状の外周上の第２の領域で前記長軸方向に延在する第１の平面を備え、前記プランジャ支持部は、前記プランジャに面する第２の平面を備え、前記第１の平面が前記第２の平面と接するとき、前記ラチェット歯が前記爪部と係合するように配置され、前記プランジャ本体は、前記ラチェット歯の終端に前記ラチェット歯の基礎部より低い領域を備え、前記爪部が前記ラチェット歯の基礎部より低い領域に入って、前記ラチェット歯と前記爪部との係合が外れることにより、前記プランジャ本体が前記フランジに対して回転できる定量注射筒用プランジャである。 The plunger for a quantitative injection tube according to one embodiment of the present invention 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. When the first plane contacts the second plane, 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.
　本発明により、構成部材が少なく、構造が簡単で、定量注射筒の組み立てが容易な定量注射筒用プランジャを提供できる。 INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a plunger for a fixed-quantity injection tube, which has few components, a simple structure, and easy to assemble a fixed-quantity injection tube.
本発明の第１の実施形態に係る定量注射筒用プランジャの一部を断面にした（ａ）概略斜視図と、（ｂ）側面図である。It is (a) schematic perspective view and (b) side view which made a part of the plunger for a fixed-quantity injection cylinder which concerns on 1st Embodiment of this invention a cross section. 本発明の第１の実施形態に係る定量注射筒用プランジャの（ａ）概略側面断面図と、（ｂ）Ａ－Ａ断面図と、（ｃ）ラチェット機構の部分拡大図である。It is (a) schematic side sectional view, (b) AA sectional view, (c) partially enlarged view of the ratchet mechanism of the plunger for a quantitative injection tube which concerns on 1st Embodiment of this invention. （ａ）は、本発明の第１の実施形態に係るプランジャ本体をフランジに対して押し込んで回転させた状態を示す、一部を断面にした概略側面図であり、（ｂ）は、図３（ａ）に示すプランジャ本体を回転させて軸方向に移動させた状態を示す、一部を断面にした概略側面図であり、（ｃ）は、定量注射筒用プランジャのＢ－Ｂ断面図である。(A) 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 a flange and rotated, and FIG. 3 (b) is a schematic side view with a partial cross section. (A) is a schematic side view showing a state in which the plunger main body is rotated and moved in the axial direction, and (c) is a sectional view taken along line BB of a plunger for a fixed-quantity injection tube. is there. 本発明の第１の実施形態に係るプランジャ本体をフランジに対して押し込んで（ａ）ラチェット機構の係合が外れた状態を示す部分拡大図と、（ｂ）ラチェット機構の係合を外して回転させた状態を示す部分拡大図である。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. 本発明の第１の実施形態に係る定量注射筒用プランジャをフランジカバーでシリンジに装着する概略斜視図である。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. 本発明の第１の実施形態に係る定量注射筒用プランジャをフランジカバーとともにシリンジに装着して注射筒を形成し、その注射筒に針部が取り付けられて形成された注射針を示す断面図である。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. 本発明の第１の実施形態に係る定量注射筒に針部が取り付けられて形成された注射針の概略斜視図である。It is a schematic perspective view of the injection needle formed by attaching the needle part to the fixed quantity injection cylinder which concerns on 1st Embodiment of this invention. 本発明の第２の実施形態に係る定量注射筒用プランジャの（ａ）概略側面断面図と、（ｂ）部分拡大断面図と、（ｃ）図９（ａ）のＣ－Ｃ断面拡大図である。In the (a) schematic side sectional view, (b) partially enlarged sectional view, and (c) CC sectional enlarged view of FIG. 9 (a) of the plunger for a quantitative injection tube according to the second embodiment of the present invention. is there. 本発明の第１の実施形態に係る定量注射筒用プランジャを、ボスを付したフランジカバーでシリンジに装着する概略斜視図である。It is a schematic perspective view which attaches the plunger for a fixed quantity injection cylinder which concerns on 1st Embodiment of this invention to a syringe with a flange cover with a boss.
　以下、本発明を実施するための様々な実施の形態を、図面を参照して説明する。要点の説明または理解の容易性を考慮して、異なる図面で便宜上符号を変えてあるいは同一にして示す。実施の形態２以降では、実施の形態１と要点の説明または理解の容易性を考慮して、便宜上実施の形態を分けて示すが、異なる実施の形態で示した構成の部分的な置換または組み合わせは可能である。 Hereinafter, various embodiments for carrying out the present invention will be described with reference to the drawings. In consideration of the explanation of the main points or the ease of understanding, different drawings are shown by changing or making the same reference symbols for convenience. In the second and subsequent embodiments, the embodiments are shown separately for the sake of convenience in consideration of the ease of explanation or understanding of the main points from the first embodiment, but partial replacement or combination of the configurations shown in the different embodiments. Is possible.
［第１の実施形態］
（定量注射筒用プランジャの概観）
　図１は、本発明の第１の実施形態に係る定量注射筒用プランジャの一部を断面にした（ａ）概略斜視図と（ｂ）側面図である。図６は、本発明の第１の実施形態に係る定量注射筒用プランジャを用いた注射筒を示す断面図である。図１及び図６を参照しながら、本発明の定量注射筒用プランジャの概観を説明する。 [First Embodiment]
(Overview of plunger for quantitative injection tube)
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.
　図１（ａ）、（ｂ）に示すように、本発明の定量注射筒用プランジャ１０３９は、プランジャ本体１００１とフランジ１００５とを備える。フランジ１００５は、プランジャ本体１００１が挿入される貫通孔を有し、図６に示すように、プランジャ本体１００１がシリンジ１０２９内に挿入された状態で、フランジ１００５をシリンジ１０２９に固定することにより定量注射筒１０４１が形成される。さらに、定量注射筒１０４１のシリンジ１０２９に針部１０３５を取り付けることにより、注射器が形成される。プランジャ本体１００１は、使用者がシリンジ１０２９に対して針部１０３５側に押し込んでシリンジ１０２９内の薬液を針部１０３５から吐出させるため、細長い形状を有している。プランジャ本体１００１は、細長い形状の外周上の第１の領域で長軸方向に延在するラチェット歯１００３を備える。 As shown in FIGS. 1 (a) and 1 (b), 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. Further, 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.
　ラチェット歯１００３には、プランジャ本体１００１をシリンジ１０２９に装着したとき、プランジャ本体１００１を針部１０３５側に押し込む方向にしか動かないよう歯に傾斜がつけられている。後述するようにこのラチェット歯１００３の１つの歯の距離だけプランジャ本体１００１が押し込まれることにより、定量の薬液を吐出させることができる。すなわち、ラチェット歯１００３の間隔で細かく定量できる。便宜上、本明細書では、注射筒に組み込んだとき、薬液を吐出させるためにプランジャ本体１００１が動作する方向のことをフランジ１００５に対して押し込む方向、その方向に動かすことをフランジ１００５に対して押し込むとする。また、押し込む方向と逆の方向をフランジ１００５から引き抜く方向、その方向に動かすことをフランジ１００５から引き抜くとする。 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. As will be described later, by pushing the plunger body 1001 by the distance of one tooth of the ratchet tooth 1003, a fixed amount of chemical solution can be discharged. That is, it can be finely quantified at intervals of ratchet teeth 1003. For convenience, in the present specification, when incorporated into an injection tube, 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. And. Further, it is assumed that 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.
　プランジャ本体１００１は、長軸方向におけるシリンジ側の先端にガスケット１００９を備える。ガスケット１００９は、シリンジ１０２９とプランジャ本体１００１の間の密閉を確保する。ガスケット１００９は、シリンジ１０２９の径の大きさに応じて取り替えることができる。 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.
　フランジ１００５はプランジャ本体１００１が挿入される貫通孔１００７を備える。貫通孔１００７は、プランジャ本体１００１を支持し、案内する。貫通孔１００７の軸方向の長さは、プランジャ本体１００１を支持し、案内できる程度の長さであることが好ましいがこれに限定されない。また、フランジ１００５は、緩く弾性変形できる材質、例えばプラスチック、樹脂などを含んで作られることが好ましい。 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. Further, the flange 1005 is preferably made of a material that can be loosely elastically deformed, for example, plastic or resin.
（定量注射筒用プランジャのラチェット機構）
　図２は、本発明の第１の実施形態に係る定量注射筒用プランジャの（ａ）概略側面断面図と（ｂ）Ａ－Ａ断面図と（ｃ）ラチェット機構の部分拡大図である。図２を参照しながら、本発明の定量注射筒用プランジャのラチェット機構について説明する。 (Ratchet mechanism of plunger for quantitative injection tube)
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.
　図２（ａ）に示すように、フランジ１００５は、フランジの貫通孔１００７の内面がラチェット歯１００３と係合する爪部１０１１を備える。ラチェット歯１００３に設けられた歯の傾斜角度により、爪部１０１１は、一方の方向には、弾性変形してラチェット歯１００３に沿って動く。一方、反対の方向には、爪部１０１１はラチェット歯１００３に当接したまま移動することができない。このように、プランジャ本体１００１は、フランジ１００５とともにラチェット機構を構成する。 As shown in FIG. 2A, 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.
　図２（ｂ）に示すように、フランジ１００５は、フランジの貫通孔１００７の内面にプランジャ本体１００１を支持する第１のプランジャ支持部１０１３及び第２のプランジャ支持部１０１５を備える。プランジャ支持部１０１３、１０１５が、プランジャ本体１００１に接触することによって貫通孔１００７内のプランジャ本体１００１を支持し、案内できる。 As shown in FIG. 2B, 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.
　プランジャ本体１００１は、外周上の第２の領域で長軸方向に延在する第１の平面１０１７を備える。また、第１のプランジャ支持部１０１３は、プランジャ本体１００１の第１の平面１０１７に面する第２の平面１０１９を備える。第１の平面１０１７が第２の平面１０１９と接するとき、ラチェット歯１００３が爪部１０１１と係合するように配置されている。 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.
　また、プランジャ本体１００１は、外周上の第３の領域で長軸方向に延在する第３の平面１０２１を備える。第２のプランジャ支持部１０１５は、プランジャ本体１００１の第３の平面１０２１に面する第４の平面１０２３を備える。そして、第１の平面１０１７が第２の平面１０１９と接するとき、第３の平面１０２１は、第４の平面１０２３と接するように配置されている。 Further, 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.
　本実施形態においては、プランジャ本体１００１の外周上に、ラチェット歯１００３、第１の平面１０１７及び第３の平面１０２１が概略等分された位置に配置されている。同様に、フランジ１００５の貫通孔１００７の内周上に、爪部１０１１、第１のプランジャ支持部１０１３（第２の平面１０１９）及び第２のプランジャ支持部１０１５（第４の平面１０２３）が概略等分された位置に配置されている。すなわち、プランジャ本体１００１は、長軸方向に垂直な断面において略正六角形を有する。そして、ラチェット歯１００３は、略正六角形の断面の第１の辺を含み、第１の平面１０１７は、略正六角形の断面の第３の辺を含み、第３の平面１０２１は、略正六角形の断面の第５の辺を含む。ただし、周上の３つの部材の配置は、概略等分に限られるものではなく、プランジャ本体１００１側及びフランジの貫通孔１００７側の３つの部材の角度位置が概略一致している限り、その他の任意の角度配置を採用できる。 In the present embodiment, 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. Similarly, on the inner circumference of the through hole 1007 of the flange 1005, 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. However, 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.
　このように、第１のプランジャ支持部１０１３の第２の平面１０１９は、プランジャ本体１００１の第１の平面１０１７に接し、第２のプランジャ支持部１０１５の第４の平面１０２３は、プランジャ本体１００１の第３の平面１０２１に接することにより、フランジ１００５の貫通孔１００７がプランジャ本体１００１を支持し、案内する。また、プランジャ支持部１０１３、１０１５は、プランジャ本体１００１がフランジ１００５に対して回転することを抑制する。回転を抑制することで、ラチェット歯１００３が爪部１０１１と係合を維持でき、ラチェット機構を確実に機能させることができる。 As described above, 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. By contacting the third plane 1021, the through hole 1007 of the flange 1005 supports and guides the plunger body 1001. Further, the plunger support portions 1013 and 1015 prevent the plunger main body 1001 from rotating with respect to the flange 1005. By suppressing the rotation, the ratchet tooth 1003 can maintain the engagement with the claw portion 1011 and the ratchet mechanism can be reliably functioned.
　図２（ｃ）に示すように、さらに爪部１０１１は両側面に壁部１０１２を備える。壁部１０１２は、先端が尖っている爪部１０１１と異なり、先端が四角くなっている。この壁部１０１２により、ラチェット歯１００３が進行方向に対して垂直方向に爪部１０１１を乗り越えられないので、爪部１０１１に沿って動き、プランジャ本体１００１の回転が抑制される。壁部１０１２の先端は、四角以外にも、ラチェット歯１００３の動きを制約できれば丸みを帯びた形も取ることができる。 As shown in FIG. 2C, 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.
　プランジャ支持部は、第１のプランジャ支持部１０１３と第２のプランジャ支持部１０１５とを備えるが、１つの支持部を備えることもできる。また、さらに第３のプランジャ支持部を備えてもよい。 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.
　プランジャ本体１００１の断面は、正六角形のほかにラチェット歯１００３、第１の平面１０１７、第３の平面１０２１を除いて円弧を有してもよい。また、プランジャ本体１００１の断面は、五角形以上の多角形であってもよい。 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.
（定量注射筒用プランジャのラチェット機構の解放）
　図３（ａ）は、本発明の第１の実施形態に係るプランジャ本体をフランジに対して押し込んで回転させた状態を示す、一部を断面にした概略側面図であり、図３（ｂ）は、図３（ａ）に示すプランジャ本体を回転させて軸方向に移動させた状態を示す、一部を断面にした概略側面図であり、図３（ｃ）は、定量注射筒用プランジャのＢ－Ｂ断面図である。図４は、本発明の第１の実施形態に係るプランジャ本体をフランジに対して押し込んで（ａ）ラチェット機構の係合が外れた状態を示す部分拡大図と、（ｂ）ラチェット機構の係合を外して回転させた状態を示す部分拡大図である。図３及び図４を参照しながら、本発明の定量注射筒用プランジャのラチェット機構の解放について説明する。 (Release of the ratchet mechanism of the plunger for the fixed-quantity injection tube)
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, FIG. 3B. 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, and FIG. 3 (c) is a schematic side view of a plunger for a quantitative injection tube. BB sectional view. FIG. 4 is 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 (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.
　図３（ａ）に示すように、プランジャ本体１００１をフランジから引き抜いたとき、ラチェット歯の長軸方向の終端にラチェット歯の基礎部より低い領域１０２４つまり溝部を備える。また、図３（ａ）の１０２５、及び図１（ａ）の１０２５、図１（ｂ）の１０２５、図２（ａ）の１０２５に示すように、プランジャ本体１００１は、プランジャ本体１００１をフランジに対して押し込んだとき、ラチェット歯１００３の長軸方向の終端にラチェット歯の基礎部より低い領域１０２５（溝部）を備える。このラチェット歯の基礎部より低い領域１０２４、１０２５（溝部）は、爪部１０１１の壁部１０１２より長く、ある程度の範囲、長軸方向に延在してもよい。 As shown in FIG. 3A, when the plunger body 1001 is pulled out from the flange, 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. Further, as shown in 1025 of FIG. 3A, 1025 of FIG. 1A, 1025 of FIG. 1B, and 1025 of FIG. 2A, the plunger body 1001 uses the plunger body 1001 as a flange. When pushed in, 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.
　図３（ａ）に示すように、プランジャ本体１００１をフランジ１００５に対して押し込むと、図４（ａ）に示すように、爪部１０１１のラチェット歯の基礎部より低い領域１０２５に入り、ラチェット歯１００３と爪部１０１１との係合が外れる。ラチェット歯１００３と爪部１０１１との係合が外れることにより、プランジャ本体１００１の第１の平面１０１７と第１のプランジャ支持部１０１３の第２の平面１０１９との間に隙間ができる。また同様に、プランジャ本体１００１の第３の平面１０２１と第２のプランジャ支持部１０１５の第４の平面１０２３との間に隙間ができる。 As shown in FIG. 3A, when the plunger body 1001 is pushed against the flange 1005, as shown in FIG. 4A, it enters the region 1025 lower than the base portion of the ratchet tooth of the claw portion 1011 and enters the ratchet tooth. The engagement between 1003 and the claw portion 1011 is disengaged. By disengaging the ratchet teeth 1003 and the claw portion 1011, a gap is formed between the first flat surface 1017 of the plunger body 1001 and the second flat surface 1019 of the first plunger support portion 1013. Similarly, a gap is formed between the third plane 1021 of the plunger main body 1001 and the fourth plane 1023 of the second plunger support portion 1015.
　したがって、プランジャ本体１００１は、プランジャ支持部１０１３、１０１５の拘束がなくなる。また、爪部１０１１の壁部１０１２がラチェット歯の基礎部より低い領域１０２５に収まる。したがって、図４（ｂ）に示すように、プランジャ支持部１０１３、１０１５の拘束がなくなり、爪部１０１１の壁部１０１２がラチェット歯の基礎部より低い領域１０２５に収まることにより、爪部１０１１が緩い弾性変形で回転できる。 Therefore, 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.
　図３（ｂ）に示すように、ラチェット歯１００３と爪部１０１１との係合を外した後に、プランジャ本体１００１をフランジ１００５に対して回転させたとき、プランジャ本体１００１は、フランジ１００５に対して長軸方向に移動できる。これによりラチェット機構から外れたプランジャ本体１００１は、ラチェット機構から外れ、フランジ１００５から引き抜くことができる。 As shown in FIG. 3B, 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.
　このとき図３（ｃ）に示すように、フランジ１００５の周方向において爪部１０１１とプランジャ支持部１０１３、１０１５との間にラチェット歯１００３が配置されことによって、ラチェット歯１００３と爪部１０１１との係合が外れる。そして、プランジャ本体１００１の第１の平面１０１７は、第１のプランジャ支持部１０１３の第２の平面１０１９と接していない。また、プランジャ本体１００１の第３の平面１０２１は、第２のプランジャ支持部１０１５の第４の平面１０２３と接していない。 At this time, as shown in FIG. 3C, 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. Further, 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.
　再び図３（ｂ）に示すように、プランジャ本体をフランジから引き抜くと、爪部１０１１は、プランジャ本体の突起部１０２６に当たる。この位置で爪部１０１１は、ラチェット歯の基礎部より低い領域１０２４（溝）に来る。ここで、プランジャ本体１００１を回転させると、爪部１０１１が、ラチェット歯の基礎部より低い領域１０２４に収まることにより、爪部１０１１が緩い弾性変形で回転できる。プランジャ本体１００１をフランジ１００５に対して回転させることによって、再びラチェット歯１００３を爪部１０１１に係合させることができる。すると、図１に示すように、プランジャ本体１００１とフランジ１００５とを初期の位置に戻すことができる。 As shown in FIG. 3B again, 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. Here, 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. By rotating the plunger body 1001 with respect to the flange 1005, 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.
　このように、本発明の第１の実施形態に係る定量注射筒用プランジャは、ラチェット機構で押し込んだ後、元に戻す機構を備えるため、使い捨てにせずに、何度でも再利用できる。 As described above, the plunger for a fixed-quantity injection tube according to the first 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, so that it can be reused as many times as necessary without being thrown away.
（定量注射筒用プランジャの注射筒への装着）
　図５は、本発明の第１の実施形態に係る定量注射筒用プランジャをフランジカバーでシリンジに装着する第１の方向からの概略斜視図である。図６は、本発明の第１の実施形態に係る定量注射筒用プランジャをフランジカバーとともにシリンジに装着して注射筒を形成し、その注射筒に針部が取り付けられて形成された注射針を示す断面図である。図７は、本発明の第１の実施形態に係る定量注射筒に針部が取り付けられて形成された注射針の概略斜視図である。図５乃至図７を参照しながら、本発明の定量注射筒用プランジャをシリンジに装着した定量注射筒を説明する。 (Attachment of plunger for fixed-quantity injection tube to injection tube)
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.
　図５に示すように、本発明の定量注射筒用プランジャを注射筒に組立てた定量注射筒１０４１は、フランジ１００５が挿入されたプランジャ本体１００１とフランジカバー１０２７とを備える。 As shown in FIG. 5, 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.
　また、本発明の定量注射筒１０４１は、シリンジ１０２９を備える。シリンジ１０２９は、フランジ部１０３１を備える。プランジャ本体１００１が挿入されたフランジ１００５と、フランジカバー１０２７とでシリンジ１０２９のフランジ部１０３１を挟み込んで固定することによりプランジャ本体１００１は、シリンジ１０２９に装着される。 Further, 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.
　フランジカバー１０２７は、定量注射筒１０４１に組立てるときに、長軸方向から組み立てる方法でも、長軸方向に分割して長軸方向から垂直にシリンジ１０２９を挟み込み組み立てる方法でもよい。 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.
　フランジ１００５及びフランジカバー１０２７は、少なくとも一部にウレタン素材から形成された部材１０３３を備える。ウレタン素材は容易に変形できるため、シリンジ１０２９のフランジ部１０３１の形状にかかわらずフランジ１００５及びフランジカバー１０２７は、シリンジ１０２９に装着できる。 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.
　図６に示すように、シリンジ１０２９の先端部には針部１０３５を取り付けることができる。さらに本発明の定量注射筒１０４１は、シリンジ１０２９とプランジャ本体１００１の間の密閉を確保するガスケット１００９を備える。このように本発明の定量注射筒１０４１は、プランジャ本体１００１とフランジ１００５とからなる定量注射筒用プランジャと、シリンジ１０２９と、ガスケット１００９とを備える。これにより、薬液を注射、注入する定量注射筒に用いることができる。 As shown in FIG. 6, a needle portion 1035 can be attached to the tip portion of the syringe 1029. Further, 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. As described above, 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.
　図７に示すように、本発明の定量注射筒１０４１は、プランジャ本体１００１と、シリンジ１０２９と、フランジ１００５とフランジカバー１０２７とが一体化したグリップ部１０３７と、を備える。 As shown in FIG. 7, 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.
　グリップ部１０３７は、使用者がプランジャ本体１００１をシリンジ１０２９に押し込む際に握る部分である。グリップ部１０３７は、略円形である。グリップ部１０３７が円形であることで、３６０°どの周囲からでもプランジャ本体１００１をシリンジ１０２９に対して押し込むことができる。 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 °.
　本発明により、構成部材が少なく、構造が簡単で、定量注射筒の組み立てが容易な定量注射筒用プランジャを提供できる。また、本発明の定量注射筒用プランジャは、ラチェット機構で押し込んだ後、元に戻す機構を備えるため、使い捨てにせずに、何度でも再利用できる。 INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a 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.
［第２の実施形態］
（定量注射筒用プランジャのラチェット機構）
　図８は、本発明の第２の実施形態に係る定量注射筒用プランジャの（ａ）概略側面断面図と、（ｂ）部分拡大断面図と、（ｃ）図８（ａ）のＣ－Ｃ断面拡大図である。図８を参照しながら、本発明のラチェット機構の変形例を有する第２の実施形態に係る定量注射筒用プランジャを説明する。本実施形態の定量注射筒用プランジャは、ラチェット機構が２つあり、定量の微調整ができる点で第１の実施形態と異なる。 [Second Embodiment]
(Ratchet mechanism of plunger for quantitative injection tube)
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.
　図８（ａ）に示すように、本発明の第２の実施形態に係る定量注射筒用プランジャは、プランジャ本体２００１に、第１のラチェット歯２００３と第２のラチェット歯２００５を備える。また、フランジ２００７に第１の爪部２００９と第２の爪部２０１１を備える。 As shown in FIG. 8A, the plunger for a quantitative injection tube according to the second embodiment of the present invention 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.
　図８（ｂ）に示すように、第１のラチェット歯２００３に第１の爪部２００９が係合し、第２のラチェット歯２００５に第２の爪部２０１１が係合する。ここで、第１のラチェット歯２００３と第２のラチェット歯２００５は押し込む方向（長軸方向）において互い違いに形成され、第１のラチェット歯２００３の歯と歯の間に第２のラチェット歯２００５の歯がある。第２のラチェット歯２００５の歯が、第１のラチェット歯２００３の歯と歯の間の中央にあるように設ければ、第１のラチェット歯２００３の２倍の細かさで定量できる。 As shown in FIG. 8B, the first claw portion 2009 engages with the first ratchet tooth 2003, and the second claw portion 2011 engages with the second ratchet tooth 2005. Here, 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.
　第１の爪部２００９と第２の爪部２０１１は、長軸方向において図示されているように異なる位置にあってもよいし、同じ位置にあってもよい。第１のラチェット歯２００３の１つの歯を第１の爪部２００９が乗り越えたところで、第２の爪部２０１１が第２のラチェット歯２００５の歯に当たるように、また第１の爪部２００９においても同様に長軸方向において異なる位置に第１の爪部２００９と第２の爪部２０１１を設けると互いがストッパの役割を果たすため好ましい。 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. When 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. Similarly, it is preferable to provide the first claw portion 2009 and the second claw portion 2011 at different positions in the long axis direction because each of them acts as a stopper.
　図８（ｃ）に示すように、本実施形態のプランジャ本体２００１は正六角形をしている。第１のラチェット歯２００３は、外周上の第１の領域で長軸方向に延在する。第２のラチェット歯２００５は外周上の第２の領域で長軸方向に延在する。第１のラチェット歯２００３は第２のラチェット歯２００５と対辺の位置にある。 As shown in FIG. 8C, 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.
　また、フランジ２００７は、第１のプランジャ支持部２０１３と第２のプランジャ支持部２０１５を備える。第１のプランジャ支持部２０１３は、第２のプランジャ支持部２０１５と対辺の位置にある。 Further, 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.
　プランジャ本体２００１は、外周上の第３の領域で長軸方向に延在する第１の平面２０１７を備える。また、第１のプランジャ支持部２０１３は、プランジャ本体２００１の第１の平面２０１７に対向する第１の曲面２０１９を備える。プランジャ本体２００１は、外周上の第４の領域で長軸方向に延在する第２の平面２０２１を備える。また、第２のプランジャ支持部２０１５は、プランジャ本体２００１の第２の平面２０２１に対向する第２の曲面２０２３を備える。そして、第１の平面２０１７が第１の曲面２０１９と対向し、第２の平面２０２１が第２の曲面２０２３と対向するとき、第１のラチェット歯２００３が第１の爪部２００９と係合し、第２のラチェット歯２００５が第２の爪部２０１１に係合するように配置されている。 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.
　ここで、実施の形態１と異なり、第１のプランジャ支持部２０１３と第２のプランジャ支持部２０１５で固定されていない。しかしながら、フランジ２００７から突出している第１のプランジャ支持部２０１３と第２のプランジャ支持部２０１５があることでプランジャ本体２００１は、回転しようとすると第１のプランジャ支持部２０１３または第２のプランジャ支持部２０１５の頂点のいずれかと接触する。そのため、プランジャ本体２００１は、プランジャ支持部２０１３、２０１５により貫通孔内で支持され、回転が抑制される。 Here, unlike the first embodiment, 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.
　このようにすることで、プランジャ本体２００１の回転を抑制し、ラチェット機構を確実に機能させることができる。第１の実施形態と同様に第１の爪部及び第２の爪部に壁部を設け、回転を抑制してもよい。 By doing so, the rotation of the plunger body 2001 can be suppressed and the ratchet mechanism can be reliably functioned. Similar to the first embodiment, wall portions may be provided on the first claw portion and the second claw portion to suppress rotation.
　プランジャ本体２００１をフランジ２００７に対して押し込んだ後、本実施形態のラチェット機構を解放するための回転機構は、第１の実施形態とラチェット機構が２つある点及び回転方向が固定される点で異なる。 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.
　ラチェット機構が２つあり、第１の爪部２００９と第２の爪部２０１１の長軸方向における位置が異なるため、第１のラチェット歯２００３と第２のラチェット歯２００５のラチェット歯の基礎部より低い領域（溝部）の長軸方向の位置も異なる。第１のラチェット歯２００３と第２のラチェット歯２００５の溝部は、長軸方向において一部重なっていてもよい。ラチェット歯の基礎部より低い領域は、第１のラチェット歯２００３の長軸方向の前端と後端にあり、第２のラチェット歯２００５の長軸方向の前端と後端にある。 Since there are two ratchet mechanisms and the positions of the 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.
　第１の爪部２００９が、第１のラチェット歯２００３のラチェット歯の基礎部より低い領域に入り、第２の爪部２０１１が第２のラチェット歯２００５の基礎部より低い領域に入ることにより、第１の爪部２００９と第２の爪部２０１１のわずかな弾性変形で、プランジャ本体２００１は、フランジ２００７に対して回転できる。 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. With slight elastic deformation of the first claw portion 2009 and the second claw portion 2011, the plunger body 2001 can rotate with respect to the flange 2007.
　第１の実施の形態と異なり、第１のプランジャ支持部２０１３が第１の曲面２０１９を有し、第２のプランジャ支持部２０１５が第２の曲面２０２３を有すること、並びに第１のプランジャ支持部２０１３及び第２のプランジャ支持部２０１５とプランジャ本体２００１とが完全に固定されていないことによりフランジ２００７の緩い弾性変形でプランジャ本体２００１は、回転できる。 Unlike the first embodiment, 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.
　プランジャ本体２００１がフランジ２００７に対して回転する回転方向は、第１のラチェット歯２００３が、第１の爪部２００９と第１のプランジャ支持部２０１３の間に入り、第２のラチェット歯２００５が、第２の爪部２０１１と第２のプランジャ支持部２０１５の間に入る方向である。 In the direction of rotation in which the plunger body 2001 rotates with respect to 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.
　第１の実施形態と同様に、ラチェット機構を解放した後、プランジャ本体２００１をフランジ２００７から引き抜き、第１の爪部２００９がプランジャ本体の突起部に当たったとき再びプランジャ本体２００１をフランジ２００７に対して回転する。第１の爪部２００９が第１のラチェット歯２００３の溝部に入り、第２の爪部２０１１が第２のラチェット歯の溝部に入ることで、プランジャ本体２００１はフランジ２００７に対して第１の爪部２００９と第２の爪部２０１１のわずかな弾性変形で回転でき、元の位置に戻すことができる。 Similar to the first embodiment, after releasing the ratchet mechanism, 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, and 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.
　このように、本発明の第２の実施形態に係る定量注射筒用プランジャは、ラチェット機構で押し込んだ後、元に戻す機構を備えるため、使い捨てにせずに、何度でも再利用できる。 As described above, 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, so that it can be reused as many times as necessary without being thrown away.
　上記からわかるように、プランジャ本体２００１は正六角形に限らず、六角形以上の正八角形やその他の偶数の多角形でもよい。また、ラチェット歯は、２つに限らず、３つ以上あってもよい。その場合さらに細かな定量ができる。 As can be seen from the above, 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.
　本発明の第２の実施形態に係る定量注射筒用プランジャは、微量の定量注射をすることができる。また、本発明の第２の実施形態に係る定量注射筒用プランジャは、ラチェット機構で押し込んだ後、元に戻す機構を備えるため、使い捨てにせずに、何度でも再利用できる。 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.
（定量注射筒用プランジャの注射筒への装着の変形例）
　図９は、本発明の第１の実施形態に係る定量注射筒用プランジャを、ボスを付したフランジカバーでシリンジに装着する概略斜視図である。図９を参照しながら、本発明の定量注射筒用プランジャの注射筒への装着の変形例を説明する。 (Modified example of mounting the plunger for a fixed-quantity injection tube on the injection tube)
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.
　図９に示すように、本発明の定量注射筒用プランジャを注射筒に組立てた定量注射筒３０４１は、フランジ３００５が挿入されたプランジャ本体３００１とフランジカバー３０２７とを備える。 As shown in FIG. 9, 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.
　また、本発明の定量注射筒３０４１は、シリンジ３０２９を備える。シリンジ３０２９は、フランジ部３０３１を備える。プランジャ本体３００１が挿入されたフランジ３００５と、フランジカバー３０２７とでシリンジ３０２９のフランジ部３０３１を挟み込んで固定することによりプランジャ本体３００１は、シリンジ３０２９に装着される。 Further, 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.
　フランジカバー３０２７は、４つのボス３０３３を備える。このボス３０３３によりフランジ部３０３１を固定し、フランジカバー３０２７に対してシリンジ３０２９を固定する。図示しないが、フランジ３００５にウレタン素材からなる部材を備え、ある程度の大きさのフランジ部３０３１に適用できるようにすることもできる。 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. Although not shown, 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.
　このようにすることで、シリンジ３０２９の回転を抑制するように定量注射筒用プランジャに固定できる。 By doing so, it can be fixed to the plunger for the fixed-quantity syringe so as to suppress the rotation of the syringe 3029.
　上述の実施形態の説明は、すべての点で例示であって、制限的なものではない。当業者にとって変形および変更が適宜可能である。本発明の範囲は、上述の実施形態ではなく、特許請求の範囲によって示される。さらに、本発明の範囲には、特許請求の範囲内と均等の範囲内での実施形態からの変更が含まれる。 The above description of the embodiment is an example in all respects and is not restrictive. Modifications and changes can be made as appropriate for those skilled in the art. The scope of the present invention is indicated by the scope of claims, not by the above-described embodiment. Further, the scope of the present invention includes modifications from the embodiment within the scope of the claims and within the scope of the claims.
　本発明は、薬液等の定量が必要な注射筒を用いた注射、注入に利用できる。 The present invention can be used for injection and injection using an injection tube that requires quantification of a drug solution or the like.
１００１　プランジャ本体
１００３　ラチェット歯
１００５　フランジ
１００７　貫通孔
１００９　ガスケット
１０１１　爪部
１０１２　壁部
１０１３　第１のプランジャ支持部（プランジャ支持部）
１０１５　第２のプランジャ支持部（プランジャ支持部）
１０１７　第１の平面
１０１９　第２の平面
１０２１　第３の平面
１０２３　第４の平面
１０２４　ラチェット歯の基礎部より低い領域
１０２５　ラチェット歯の基礎部より低い領域
１０２６　突起部
１０２７　フランジカバー
１０２９　シリンジ
１０３１　フランジ部
１０３３　ウレタン素材から形成された部材
１０３５　針部
１０３７　グリップ部
１０３９　定量注射筒用プランジャ
１０４１　定量注射筒
２００１　プランジャ本体
２００３　第１のラチェット歯
２００５　第２のラチェット歯
２００７　フランジ
２００９　第１の爪部
２０１１　第２の爪部
２０１３　第１のプランジャ支持部
２０１５　第２のプランジャ支持部
２０１７　第１の平面
２０１９　第１の曲面
２０２１　第２の平面
２０２３　第２の曲面
３００１　プランジャ本体
３００５　フランジ
３０２７　フランジカバー
３０２９　シリンジ
３０３１　フランジ部
３０３３　ボス
３０４１　定量注射筒 1001 Plunger body 1003 Ratchet tooth 1005 Flange 1007 Through hole 1009 Gasket 1011 Claw 1012 Wall 1013 First plunger support (plunger support)
1015 Second plunger support (plunger support)
1017 1st plane 1019 2nd plane 1021 3rd plane 1023 4th plane 1024 Area lower than base of ratchet teeth 1025 Area lower than base of ratchet teeth 1026 Protrusion 1027 Flange cover 1029 Syringe 1031 Flange 1033 Member made of urethane material 1035 Needle part 1037 Grip part 1039 Plunger for fixed-quantity syringe 1041 Fixed-quantity syringe 2001 Plunger body 2003 First ratchet tooth 2005 Second ratchet tooth 2007 Flange 2009 First claw portion 2011 Second Claw 2013 1st plunger support 2015 2nd plunger support 2017 1st flat surface 2019 1st curved surface 2021 2nd flat surface 2023 2nd curved surface 3001 Plunger body 3005 Flange 3027 Flange cover 3029 Syringe 3031 Flange part 3033 Boss 3041 fixed quantity syringe

Claims (11)

  1. 　細長い形状を有し、前記細長い形状の外周上の第１の領域で長軸方向に延在するラチェット歯を備えるプランジャ本体と、
    　前記プランジャ本体が挿入される貫通孔を有し、前記貫通孔の内面が前記ラチェット歯と係合してラチェット機構を構成する爪部及び前記プランジャ本体を支持するプランジャ支持部を備えるフランジと、を備え、
    　前記プランジャ本体は、前記細長い形状の外周上の第２の領域で前記長軸方向に延在する第１の平面を備え、
    　前記プランジャ支持部は、前記プランジャ本体に面する第２の平面を備え、
    　前記第１の平面が前記第２の平面と接するとき、前記ラチェット歯が前記爪部と係合するように配置され、
    　前記プランジャ本体は、前記ラチェット歯の終端に前記ラチェット歯の基礎部より低い領域を備え、
    　前記爪部が前記ラチェット歯の基礎部より低い領域に入って、前記ラチェット歯と前記爪部との係合が外れることにより、前記プランジャ本体が前記フランジに対して回転できる定量注射筒用プランジャ。     A plunger body having an elongated shape and having ratchet teeth extending in the longitudinal direction in a first region on the outer circumference of the elongated shape.
    A flange having a through hole into which the plunger body is inserted, a claw portion in which the inner surface of the through hole engages with the ratchet teeth to form a ratchet mechanism, and a flanger support portion for supporting the plunger body. Prepare,
    The plunger body comprises a first plane extending in the longitudinal direction in a second region on the outer circumference of the elongated shape.
    The plunger support includes a second plane facing the plunger body.
    When the first plane is in contact with the second plane, the ratchet teeth are arranged to engage the claws.
    The plunger body comprises a region lower than the base of the ratchet tooth at the end of the ratchet tooth.
    A plunger for a fixed-quantity injection tube in which the plunger body can rotate with respect to the flange by entering the region lower than the base portion of the ratchet tooth and disengaging the engagement between the ratchet tooth and the claw portion.
  2. 　前記ラチェット歯と前記爪部との係合を外し、前記プランジャ本体を前記フランジに対して回転させて、周方向において前記爪部と前記プランジャ支持部との間に前記ラチェット歯を配置することにより、前記プランジャ本体は、前記フランジに対して前記長軸方向に移動できる、請求項１に記載の定量注射筒用プランジャ。 By disengaging the ratchet teeth from the claw portion, rotating the plunger body with respect to the flange, and arranging the ratchet teeth between the claw portion and the plunger support portion in the circumferential direction. The plunger for a fixed-quantity injection tube according to claim 1, wherein the plunger body can move in the long axis direction with respect to the flange.
  3. 　前記プランジャ本体は、前記細長い形状の外周上の第３の領域で前記長軸方向に延在する第３の平面を備え、
    　前記プランジャ支持部は、前記第２の平面を備える第１のプランジャ支持部と、前記プランジャ本体に面する第４の平面を備える第２のプランジャ支持部と、を備え、
    　前記第１の平面が前記第２の平面と接するとき、前記第３の平面は、前記第４の平面と接する、請求項１または２に記載の定量注射筒用プランジャ。     The plunger body comprises a third plane extending in the longitudinal direction in a third region on the outer circumference of the elongated shape.
    The plunger support includes a first plunger support having the second plane and a second plunger support having a fourth plane facing the plunger body.
    The plunger for a quantitative injection tube according to claim 1 or 2, wherein when the first plane is in contact with the second plane, the third plane is in contact with the fourth plane.
  4. 　前記プランジャ本体は、略正六角形の断面を有し、
    　前記ラチェット歯は、前記略正六角形の断面の第１の辺を含み、
    　前記第１の平面は、前記略正六角形の断面の第３の辺を含み、
    　前記第３の平面は、前記略正六角形の断面の第５の辺を含む、請求項３に記載の定量注射筒用プランジャ。     The plunger body has a substantially regular hexagonal cross section.
    The ratchet tooth includes the first side of the cross section of the substantially regular hexagon.
    The first plane includes a third side of the cross section of the substantially regular hexagon.
    The plunger for a quantitative injection tube according to claim 3, wherein the third plane includes a fifth side of a cross section of the substantially regular hexagon.
  5. 　前記ラチェット歯は、複数設けられることを特徴とする、請求項１または２に記載の定量注射筒用プランジャ。 The plunger for a quantitative injection tube according to claim 1 or 2, wherein a plurality of the ratchet teeth are provided.
  6. 　前記爪部は、両側面に先端が四角い壁部を備える、請求項１乃至５のいずれか１項に記載の定量注射筒用プランジャ。 The plunger for a quantitative injection tube according to any one of claims 1 to 5, wherein the claw portion is provided with wall portions having square tips on both side surfaces.
  7. 　前記プランジャ本体が挿入された前記フランジとフランジカバーとでシリンジのフランジ部を挟み、前記プランジャ本体を前記シリンジに装着させる、請求項１乃至６のいずれか１項に記載の定量注射筒用プランジャ。 The plunger for a quantitative injection tube according to any one of claims 1 to 6, wherein the flange portion of the syringe is sandwiched between the flange into which the plunger body is inserted and the flange cover, and the plunger body is attached to the syringe.
  8. 　前記フランジ及び前記フランジカバーは、使用者が前記プランジャ本体を前記シリンジに押し込むグリップ部となり、前記グリップ部は、略円形である、請求項７に記載の定量注射筒用プランジャ。 The plunger for a quantitative injection cylinder according to claim 7, wherein the flange and the flange cover serve as a grip portion for the user to push the plunger body into the syringe, and the grip portion is substantially circular.
  9. 　前記フランジ及び前記フランジカバーは、少なくとも一部にウレタン素材から形成された部材を備える、請求項７または８に記載の定量注射筒用プランジャ。 The plunger for a quantitative injection tube according to claim 7 or 8, wherein the flange and the flange cover are provided with a member formed of a urethane material at least in part.
  10. 　前記フランジカバーに前記シリンジの回転を抑制するようにボスが設けられる、請求項７乃至９のいずれか１項に記載の定量注射筒用プランジャ。 The plunger for a quantitative injection tube according to any one of claims 7 to 9, wherein a boss is provided on the flange cover so as to suppress the rotation of the syringe.
  11. 　請求項１乃至１０のいずれか１項に記載の定量注射筒用プランジャと、
    　シリンジと、
    　前記シリンジと前記プランジャ本体を密閉するガスケットと、を備える、定量注射筒。     The plunger for a quantitative injection tube according to any one of claims 1 to 10 and
    With a syringe
    A metered-quantity injection tube comprising the syringe and a gasket for sealing the plunger body.
PCT/JP2020/019985 2019-05-20 2020-05-20 Fixed-quantity syringe plunger and fixed-quantity syringe WO2020235604A1 (en)

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KR20240038986A (en) * 2021-08-18 2024-03-26 (주)제이엠바이오텍 Quantitative injection device for chemical liquid
US11911598B2 (en) 2021-08-18 2024-02-27 Jmbiotech Co., Ltd. Device for injecting fixed quantity of liquid medicine

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JP2012210966A (en) * 2011-03-31 2012-11-01 Gc Corp Double syringe with click sound function
JP2012532635A (en) * 2009-07-08 2012-12-20 ノボ・ノルデイスク・エー／エス Injection device that resists freezing
JP2013506467A (en) * 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 Reconfigurable drive mechanism for drug delivery devices
JP2014513595A (en) * 2011-03-17 2014-06-05 ベクトン・ディキンソン・アンド・カンパニー Medical injector with rotatable ratchet plunger
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JP2012532635A (en) * 2009-07-08 2012-12-20 ノボ・ノルデイスク・エー／エス Injection device that resists freezing
JP2013506467A (en) * 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 Reconfigurable drive mechanism for drug delivery devices
JP2014513595A (en) * 2011-03-17 2014-06-05 ベクトン・ディキンソン・アンド・カンパニー Medical injector with rotatable ratchet plunger
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US20170354791A1 (en) * 2015-02-10 2017-12-14 Gad Lewkonya Safe auto-needle device

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