WO2020189149A1 - Outil de compression de piston - Google Patents

Outil de compression de piston Download PDF

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Publication number
WO2020189149A1
WO2020189149A1 PCT/JP2020/006309 JP2020006309W WO2020189149A1 WO 2020189149 A1 WO2020189149 A1 WO 2020189149A1 JP 2020006309 W JP2020006309 W JP 2020006309W WO 2020189149 A1 WO2020189149 A1 WO 2020189149A1
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WO
WIPO (PCT)
Prior art keywords
outer cylinder
plunger
hinge
contact portion
syringe
Prior art date
Application number
PCT/JP2020/006309
Other languages
English (en)
Japanese (ja)
Inventor
順紀 阿部
昭宏 ▲高▼橋
Original Assignee
テルモ株式会社
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 テルモ株式会社 filed Critical テルモ株式会社
Priority to JP2021506251A priority Critical patent/JP7420787B2/ja
Publication of WO2020189149A1 publication Critical patent/WO2020189149A1/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
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons

Definitions

  • the present invention relates to a plunger presser for pressing a plunger of a syringe.
  • a syringe prefilled syringe pre-filled with a chemical solution or the like
  • a prefilled syringe includes an outer cylinder filled with a chemical solution, a gasket slidably housed in the outer cylinder, and a plunger for moving the gasket.
  • the prefilled syringe may be filled with a highly viscous chemical solution, which causes a large resistance (pressing resistance) when pressing the plunger.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2018-5007087
  • Patent Document 1 includes a housing for holding a syringe and a plunger, a trigger held in the housing, and a lever including a cam communicating with the trigger. ..
  • the cam communicates with the flange of the syringe.
  • the upper end of the cam moves longitudinally towards the ejection end of the syringe.
  • the plunger a pin provided integrally with the syringe
  • the trigger and the lever are integrally configured, and they are configured to rotate around a pivot point (trigger pivot) provided between the trigger and the lever.
  • the prefilled syringe is filled with various chemicals, and their characteristics such as viscosity are different. Further, the preferred resistance when operating various devices to press the plunger varies from operator to operator. However, in a device such as Patent Document 1, it is difficult to adjust the pressing resistance of the plunger in accordance with the chemical solution and the operator.
  • the plunger moves toward the outer cylinder as the plunger is pressed.
  • the distance between the fulcrum and the point of action changes while the plunger is pressed. That is, the distance between the fulcrum (trigger pivot) and the point of action (pin in contact with the cam) changes significantly. For this reason, the pressing resistance felt by the operator while pressing the plunger changes significantly.
  • An object of the present invention is to provide a plunger pressing tool capable of adjusting the resistance at the time of pressing the plunger to a desired degree and suppressing a change in the resistance during pressing of the plunger.
  • a plunger press for a syringe including an outer cylinder, a gasket slidably housed in the outer cylinder, and a plunger for moving the gasket.
  • the plunger pressing tool is provided on a grip portion having a syringe mounting portion on which the syringe can be mounted on the outer cylinder, an extending portion extending rearward from the upper portion of the grip portion, and a rear portion of the extending portion.
  • a main body portion having a hinge portion and a handle portion rotatably held by the hinge portion are provided.
  • the handle portion includes a contact portion capable of contacting the rear end portion of the plunger of the mounted syringe and an operation portion extending downward from the contact portion, and the contact portion and the operation portion.
  • the distance between the lower ends of the hinge portion is longer than the distance between the rotation axis of the hinge portion and the contact portion.
  • the contact portion is rotatable in the direction of the outer cylinder mounted on the syringe mounting portion with the hinge portion as the center, and the contact portion is located directly below the hinge portion.
  • a plunger pressing tool located on or below the extension line of the central axis of the outer cylinder mounted on the syringe mounting portion.
  • FIG. 1 is a front view of a plunger pressing tool according to an embodiment of the present invention to which a syringe is attached, and is an explanatory view (at the start of operation) for explaining the operation of the plunger pressing tool.
  • FIG. 2 is a left side view of the plunger pressing tool shown in FIG.
  • FIG. 3 is a right side view of the plunger pressing tool shown in FIG.
  • FIG. 4 is a plan view of the plunger pressing tool shown in FIG.
  • FIG. 5 is a bottom view of the plunger pressing tool shown in FIG.
  • FIG. 6 is a cross-sectional view taken along the line AA in FIG.
  • FIG. 7 is an enlarged view of part B in FIG.
  • FIG. 8 is a perspective view of the plunger pressing tool shown in FIG. FIG.
  • FIG. 9 is another perspective view of the plunger pressing tool shown in FIG.
  • FIG. 10 is an explanatory diagram (during operation) for explaining the operation of the plunger pressing tool of the present invention.
  • FIG. 11 is an explanatory diagram (when the operation is completed) for explaining the operation of the plunger pressing tool of the present invention.
  • FIG. 12 is a front view of the plunger pressing tool of another embodiment of the present invention to which the syringe is attached, and is an explanatory view (at the start of operation) for explaining the operation of the plunger pressing tool.
  • FIG. 13 is an explanatory diagram (during operation) for explaining the operation of the plunger pressing tool shown in FIG.
  • FIG. 14 is an explanatory diagram (when the operation is completed) for explaining the operation of the plunger pressing tool shown in FIG.
  • FIG. 13 is an explanatory diagram (during operation) for explaining the operation of the plunger pressing tool shown in FIG.
  • FIG. 15 is an enlarged explanatory view for explaining the locus of the contact portion during the operation of the plunger pressing tool shown in FIG.
  • FIG. 16 is an enlarged explanatory view for explaining a locus of a contact portion during operation of the plunger pressing tool of another embodiment of the present invention.
  • FIG. 17 is a front view of a plunger presser according to still another embodiment of the present invention to which a syringe is attached.
  • the plunger pressing tool 1 of the present invention is a plunger pressing tool for a syringe including an outer cylinder, a gasket slidably housed in the outer cylinder, and a plunger for moving the gasket.
  • FIG. 1 to 9 show a front view, a left side view, a right side view, a plan view, a bottom view, a cross-sectional view, and a perspective view of a state in which the syringe 3 is attached to the plunger pressing tool 1, respectively.
  • the vertical direction in FIG. 1 is described as the vertical direction
  • the horizontal direction is described as the front-rear direction (left side is front, right side is rear), but this does not necessarily mean the operating state of the plunger pressing tool 1. It does not specify.
  • the plunger pressing tool 1 of the present invention includes a plunger pressing tool 1 for a syringe 3 including an outer cylinder 31, a gasket 35 slidably housed in the outer cylinder 31, and a plunger 36 for moving the gasket.
  • the plunger pressing tool 1 includes a grip portion 12 having a syringe mounting portion 13 on which a syringe 3 can be mounted on an outer cylinder 31, an extending portion 14 extending rearward from the upper portion of the grip portion 12, and a rear portion of the extending portion 14.
  • the main body portion 11 including the hinge portion 15 provided on the hinge portion 15 and the handle portion 16 rotatably held by the hinge portion 15 are provided.
  • the handle portion 16 includes a contact portion 17 capable of contacting the rear end portion of the plunger 36 of the mounted syringe 3, and an operation portion 18 extending downward from the contact portion 17, and operates with the contact portion 17.
  • the distance between the lower ends of the portion 18 is longer than the distance between the rotation axis of the hinge portion 15: A1 and the contact portion 17.
  • the abutting portion 17 is rotatable in the direction of the outer cylinder 31 mounted on the syringe mounting portion 13 (outer cylinder direction) with the hinge portion 15 as the center, and is located directly below the hinge portion 15.
  • the contact portion 17 is located on or slightly below the extension line of the central axis of the outer cylinder 31 mounted on the syringe mounting portion 13.
  • the plunger pressing tool 1 includes a main body portion 11 and a handle portion 16.
  • the main body 11 of the plunger pressing tool 1 includes a grip portion 12 including a syringe mounting portion 13, an extension portion 14 extending rearward from the upper portion of the grip portion 12, and a hinge portion 15 provided at the rear portion of the extension portion 14. And.
  • the grip portion 12 has a substantially rod shape.
  • a cylindrical syringe mounting portion 13 is provided on the upper portion of the grip portion 12 (a portion above the center of the grip portion 12 in the longitudinal direction).
  • the syringe mounting portion 13 preferably regulates the rotation and detachment of the mounted outer cylinder 31.
  • the inner diameter of the syringe mounting portion 13 is equal to or slightly larger than the outer diameter of the outer cylinder 31 of the syringe 3 described later.
  • an annular minute convex portion 13a that slightly protrudes inward is formed on the inner peripheral surface of the rear portion of the syringe mounting portion 13, and is provided on the outer peripheral surface of the outer cylinder 31 of the syringe 3 described later.
  • the outer cylinder 31 mounted on the syringe mounting portion 13 is restricted from rotating and detaching.
  • the syringe mounting portion may be of a type in which the tip end surface of the flange portion of the outer cylinder of the syringe abuts on the rear end surface.
  • the inner diameter of the syringe mounting portion 13 is preferably 15 to 32 mm. Further, the length of the syringe mounting portion 13 is preferably 5 to 50 mm. It is preferable that the syringe mounting portion 13 has a diameter slightly increased toward the rear end side.
  • the main body portion 11 does not deform at the time of use at the grip portion 12 and at the boundary portion between the grip portion 12 and the syringe mounting portion 13. Therefore, the main body 11 is preferably formed of a metal material or a hard resin.
  • the grip portion 12 preferably has a shape that is easy for the operator to grip.
  • the grip portion 12 is provided with inclined surfaces 12a and 12b on both sides of the portion below the syringe mounting portion 13 of the grip portion 12 so that the cross-sectional area thereof gradually decreases toward the front. Further, it is preferable that the lower end portion of the grip portion 12 extends to a position equivalent to the lower end portion of the handle portion 16 described later. It is assumed that the operator grips the grip portion 12 extending downward from the syringe mounting portion 13, but the grip portion 12 is not limited to this, and the grip portion 12 is further inserted from the syringe mounting portion 13 so as to sandwich the syringe mounting portion 13. The operator may be configured to grip the portion extending upward.
  • the extending portion 14 is integrally formed with the grip portion 12, and extends rearward from the upper part of the grip portion 12. It should be noted that the tip portion of the extension portion, which is a separate member, may be fixed to the upper end portion of the grip portion instead of the one-piece object.
  • the extension portion 14 includes a portion extending upward from the syringe mounting portion 13 located at the upper end of the grip portion 12. The portion extending upward is formed to have the same width as the syringe mounting portion 13.
  • the extending portion 14 includes a portion extending rearward from the upper end of the above-mentioned upward extending portion.
  • the angle formed by the upwardly extending portion and the rearwardly extending portion of the extending portion 14 is a substantially right angle.
  • a hinge portion 15 is provided at the rear portion of the extension portion 14, specifically, at the rear end portion.
  • the hinge portion 15 has a structure for rotatably supporting the handle portion 16 to be attached around the rotation axis: A1 of the hinge portion 15, and a known bearing, a mechanism using a bearing or the like is used.
  • the handle portion 16 is rotatably attached to the main body portion 11 of the plunger pressing tool 1 by the hinge portion 15.
  • the hinge portion 15 is located above the extension line of the central axis of the syringe mounting portion 13 by a predetermined length, and is located behind the rear end of the syringe mounting portion 13 by a predetermined length.
  • the hinge portion 15 is located obliquely above the rear end of the rear end of the syringe mounting portion 13.
  • the distance between the hinge portion 15 and the extension line of the central axis of the syringe mounting portion 13 is preferably about 25 to 60 mm.
  • the handle portion 16 is a substantially curved rod-shaped body.
  • the handle portion 16 is attached to the hinge portion 15 by two arm portions 19 and 19 formed on the upper portion thereof.
  • the distance between the two arm portions 19 and 19 is larger than the width of the extension portion 14.
  • An interference avoidance notch 20 having a width dimension (dimension in the left-right direction in FIG. 3) larger than that of the extension portion 14 is formed between the arm portions 19 and 19.
  • the handle portion 16 does not interfere with the extension portion 14 because the rear end portion of the extension portion 14 can enter the portion where the interference avoidance cutout portion 20 is formed.
  • the handle portion 16 can be sufficiently rotated in the direction away from the outer cylinder 31 of the syringe 3 (counterclockwise direction in FIG. 1).
  • a contact portion 17 is formed in an intermediate portion of the handle portion 16 (here, a portion above the center in the longitudinal direction of the handle portion 16).
  • the contact portion 17 can come into contact with the rear end portion (pressing portion 36b) of the plunger 36 while the syringe 3 is held by the syringe mounting portion 13.
  • the contact portion 17 is rotatable around the hinge portion 15 in the direction of the outer cylinder 31 mounted on the syringe mounting portion 13, and is as shown in FIG. 10 described later.
  • the contact portion 17 when located directly below the hinge portion 15 is located on or slightly below the extension line of the central axis of the outer cylinder 31 mounted on the syringe mounting portion 13. ..
  • the contact portion 17 is the syringe mounting portion 13. It is located substantially on the extension line (A2) of the central axis of the outer cylinder 31 mounted on the outer cylinder 31.
  • the contact portion 17 is provided with recesses 17a and 17b at its upper portion and lower portion, respectively, and has a linear shape extending substantially parallel to the rotation axis of the hinge portion 15: A1 (in the direction perpendicular to the paper surface in FIG. 1) at the central portion. It has a top 17c.
  • the contact portion 17 includes a linear top portion 17c extending substantially parallel to the rotation axis of the hinge portion 15: A1.
  • the recess 17a is provided with an upper inclined surface having a linear top 17c as an apex.
  • the recess 17b includes a lower inclined surface having a linear top 17c as an apex.
  • the contact portion 17 moves on an arc whose radius is the distance between the contact portion 17 and the central axis of the hinge portion 15: A1 with the central axis of the hinge portion 15 as the center due to the rotation of the handle portion 16.
  • the linear apex 17c is also centered on the central axis of the hinge portion 15: A1 by the rotation of the handle portion 16 while maintaining the state parallel to the center line of the hinge portion 15, and the linear apex 17c and the hinge.
  • Central axis of unit 15 Moves on an arc whose radius is the distance between A1.
  • the handle portion 16 includes an operation portion 18 extending downward from the contact portion 17.
  • the contact portion 17 and the operation portion 18 are formed in that order in the same direction as viewed from the attachment portion to the hinge portion 15.
  • the distance between the contact portion 17 (linear top portion 17c) and the lower end of the operation portion 18 is the rotation axis of the hinge portion 15: A1 and the contact portion 17.
  • the distance between (linear tops 17c) is preferably twice or more, and more preferably four times or more.
  • the distance between the contact portion 17 and the lower end of the operation portion 18: D2 is about four times the distance between the rotation axis of the hinge portion 15: A1 and the contact portion 17: D1. It has become.
  • the operating portion 18 is curved rearward (in a direction away from the outer cylinder 31) from the contact portion 17 toward the lower end side.
  • the handle is preferably curved as described above, but may be linear.
  • the syringe 3 attached to the plunger pressing tool 1 includes a cylindrical outer cylinder 31, a gasket 35 slidably housed in the outer cylinder 31, and a plunger 36 for moving the gasket 35. ..
  • the outer cylinder 31 is a substantially tubular member that houses the gasket 35 in a liquid-tight and slidable manner.
  • a nozzle portion 33 having a small diameter is provided at the tip portion of the outer cylinder 31, and the tip end side portion of the outer cylinder 31 has a tapered shape in which the diameter is reduced toward the nozzle portion 33.
  • a flange 34 is provided at the rear end of the outer cylinder 31.
  • the flange 34 has an arcuate outer edge formed so as to project in the vertical direction from the entire circumference of the rear end of the outer cylinder 31.
  • an annular micro-concave portion 31a that can engage with the micro-convex portion 13a formed in the syringe mounting portion 13 described above is formed.
  • the gasket 35 is made of elastic rubber or synthetic resin. As shown in FIG. 6, the gasket 35 includes a substantially tubular main body portion 35a extending with substantially the same outer diameter, and a tapered closing portion 35b extending in the tip direction from the main body portion 35a. The outer surface of the main body 35a is in liquid-tight contact with the inner surface of the outer cylinder 31.
  • the closed portion 35b of the gasket 35 has a shape (tapered shape) corresponding to the shape of the tip inner surface of the outer cylinder 31 so as not to form a gap between the two when it comes into contact with the tip inner surface of the outer cylinder 31. ..
  • the plunger 36 is made of a hard or semi-hard resin.
  • the plunger 36 includes a shaft portion 36a formed in a cross section and a disk-shaped pressing portion 36b provided at the rear end thereof.
  • the tip of the shaft portion 36a is attached to the gasket 35.
  • the gasket 35 moves integrally with the plunger 36.
  • the space formed by the outer cylinder 31 and the gasket 35 is filled with the chemical solution 37 in advance. That is, the syringe 3 used in this embodiment is a so-called prefilled syringe.
  • the plunger 36 and the gasket 35 move to the tip side of the syringe 3, and the chemical solution 37 is moved from the nozzle portion 33 provided at the tip portion of the outer cylinder 31. Is discharged.
  • a highly viscous chemical solution particularly a chemical solution having a viscosity of 5 [mPa ⁇ s] or more, is filled as the chemical solution 37 filled in the space formed by the outer cylinder 31 and the gasket 35.
  • the plunger presser of the present invention is effective.
  • chemicals include medical liquids such as hyaluronic acid solutions, high-viscosity anticancer agents, high-viscosity biologics, and contrast agents.
  • Such a syringe 3 is attached to the syringe mounting portion 13 of the plunger pressing tool 1. Specifically, the syringe 3 is inserted from the rear of the syringe mounting portion 13, and the outer cylinder 31 is held by the syringe mounting portion 13 with a certain width in the longitudinal direction. At this time, as shown in FIG. 7, the micro-convex portion 13a provided on the inner peripheral surface of the syringe mounting portion 13 and the micro-concave portion 31a provided on the outer peripheral surface of the outer cylinder 31 of the syringe 3 engage with each other. As a result, the syringe 3 is held more firmly, particularly immovably in the anteroposterior direction. Further, when the syringe 3 is attached to the plunger pressing tool 1, the front end surface of the flange 34 of the outer cylinder 31 is substantially in contact with the rear end surface of the syringe mounting portion 13.
  • FIG. 1 shows the state at the start of operation of the plunger pressing tool 1 (at the start of pressing the plunger 36).
  • the contact portion 17 of the handle portion 16 is in contact with the pressing portion 36b of the plunger 36. More specifically, the linear top portion 17c of the abutting portion 17 linearly abuts on the rear end surface of the pressing portion 36b.
  • the contact portion 17 (the contact portion between the linear top portion 17c and the pressing portion 36b) is on the extension line: A2 of the central axis of the outer cylinder 31 in the vertical direction.
  • the upper inclined surface of the recess 17a of the contact portion 17 is substantially in contact with the pressing portion 36b of the plunger 36.
  • the operator grips the grip portion 12 and holds the plunger pressing tool 1 at a desired position. Then, by pressing an arbitrary position of the operation portion 18 of the handle portion 16 in the outer cylinder direction, the contact portion 17 rotates in the outer cylinder direction with the hinge portion 15 as the center. Along with this, the plunger 36 (and the gasket 35) moves toward the outer cylinder, and the chemical solution 37 filled in the syringe 3 is discharged from the nozzle portion 33.
  • FIG. 10 shows a state in which the contact portion 17 is located directly below the hinge portion 15 (specifically, vertically below) while the plunger pressing tool 1 is being operated (while the plunger 36 is being pressed). It is shown.
  • the contact portion 17 of the handle portion 16 is an extension line of the central axis of the outer cylinder 31 mounted on the syringe mounting portion 13 (the extension line of the central axis of the syringe mounting portion 13 also substantially coincides with this). : Located below A2. That is, the contact portion 17 when it is located directly below the hinge portion 15 is located slightly below the extension line of the central axis of the outer cylinder 31 mounted on the syringe mounting portion 13: A2.
  • the extension line of the central axis of the contact portion 17 and the outer cylinder 31 is 1/2 or less of the inner diameter of the outer cylinder 31 (the radius of the rear end of the lumen of the outer cylinder 31 or less). It has become.
  • the contact portion 17 is substantially below the extension line of the central axis of the outer cylinder 31 and below the outer cylinder. It moves within a range corresponding to 1/2 of the inner diameter of 31.
  • FIG. 11 shows the state when the operation of the plunger pressing tool 1 is completed (when the pressing of the plunger 36 is completed). At this time, the closing portion 35b of the gasket 35 attached to the tip of the plunger 36 comes into contact with the inner surface of the tip of the outer cylinder 31, so that the movement of the plunger 36 in the outer cylinder direction is completed and the syringe 3 is filled. The chemical solution 37 has been completely discharged.
  • the front surface of the operation portion 18 of the handle portion 16 is close to the rear surface of the grip portion 12 so as to be in contact with or slightly separated from the rear surface.
  • the handle portion 16 and the grip portion 12 are configured to come into contact with each other before the closing portion 35b of the gasket 35 comes into contact with the inner surface of the tip of the outer cylinder 31, and the operation of the plunger pressing tool 1 is completed. It may be specified.
  • the contact portion 17 (linear top portion 17c) during operation of the plunger pressing tool 1 (the handle portion 16 at the start of operation is shown by a broken line in FIG. 11).
  • Trajectory: T is a part of an arc centered on the hinge portion 15 (rotation axis: A1).
  • the locus: T focused on the vertical direction takes the highest position at the start of the operation (FIG. 1) and the lowest position at the position directly below the hinge portion 15 (FIG. 10). In the vertical direction, it is within the range corresponding to 1/2 of the inner diameter of the outer cylinder 31. With such a configuration, the pressing force can be uniformly applied to the plunger 36 in the direction of the central axis of the outer cylinder 31.
  • the locus: T of the contact portion 17 during the operation of the plunger pressing tool 1 is within a range corresponding to 1/2 of the inner diameter of the outer cylinder 31 in the vertical direction. Further, it is more preferable that the locus: T is within a range of 30% or less of the inner diameter from the extension line of the central axis of the outer cylinder 31: A2.
  • the plunger pressing tool 1 of the present invention has a so-called "type 2 lever" structure. That is, the point of action (contact portion 17) and the point of effort (operation unit 18) are located in the same direction as viewed from the fulcrum [hinge portion 15 (rotation axis: A1)], and the direction of the force at the point of effort And the direction of the force at the point of action match. Therefore, there is little discomfort with respect to the operation of pressing the plunger 36 of the syringe 3 filled with the chemical solution 37, which requires extremely high precision.
  • the plunger pressing tool disclosed in Patent Document 1 and the like described above has a so-called "first-class lever" structure in which the point of action and the point of effort are located on opposite sides of the fulcrum. Therefore, the direction of the force at the point of effort and the direction of the force at the point of action are reversed, which may cause a sense of discomfort.
  • the handle portion 16 has a contact portion 17 (linear top portion 17c) capable of contacting the pressing portion 36b provided at the rear end portion of the plunger 36, and the contact portion.
  • the operation portion 18 extending below the 17 is provided, and the distance between the contact portion 17 and the lower end of the operation portion 18: D2 is longer than the distance between the rotation axis of the hinge portion 15: A1 and the contact portion 17: D1.
  • the contact portion 17 is rotatable around the hinge portion 15 (rotational shaft: A1) in the direction of the outer cylinder mounted on the syringe mounting portion 13.
  • the operating portion 18 is pressed so that the contact portion 17 rotates in the outer cylinder direction, thereby pressing the plunger 36 in contact with the contact portion 17 in the outer cylinder direction with a smaller force. can do.
  • the pressing resistance of the plunger 36 can be reduced.
  • the pressing resistance can be adjusted to a desired degree by the operator arbitrarily selecting the pressing position.
  • the contact portion 17 when located directly below the hinge portion 15 is located on or slightly below the extension line of the central axis of the outer cylinder 31 mounted on the syringe mounting portion 13. Therefore, the point of action (the contact portion between the contact portion 17 and the pressing portion 36b of the plunger 36) over the entire range during pressing of the plunger 36 is an extension line of the central axis of the outer cylinder 31 in the vertical direction: A2. The amount of deviation is as small as possible. Therefore, the pressing force can be applied to the plunger 36 substantially uniformly in the direction of the central axis of the outer cylinder.
  • the contact portion 17 when located directly below the hinge portion 15 is an extension line of the central axis of the outer cylinder 31 mounted on the syringe mounting portion 13, slightly below A2.
  • the contact portion 17 is located at, and crosses the extension line of the central axis of the outer cylinder 31: A2 by moving from the position directly below the hinge portion 15 in the direction away from the outer cylinder. Therefore, the amount of action point (contact portion between the contact portion 17 and the pressing portion 36b of the plunger 36) deviates from the extension line of the central axis of the outer cylinder 31: A2 over the entire range during pressing of the plunger 36. But becomes smaller.
  • the length of the linear apex 17c is preferably longer than the longest horizontal portion of the pressing portion 36b of the plunger of the syringe used, specifically, longer than the diameter of the pressing portion 36b of the plunger.
  • the contact portion 17 includes a linear top portion 17c extending substantially parallel to the rotation axis of the hinge portion 15: A1, and the linear top portion 17c is the plunger. It abuts linearly with the pressing portion 36b of 36. Therefore, it is possible to avoid applying excessive stress to the abutting portion as compared with the case where the abutting portion 17 and the pressing portion 36b abut at one point. Further, since the distance between the fulcrum (rotation axis of the hinge portion 15: A1) and the point of action (linear apex 17c) does not change over the entire range during pressing of the plunger 36, the change in pressing resistance is further suppressed. Will be done.
  • the distance between the contact portion 17 and the lower end of the operation portion 18 is longer than the distance between the rotation axis of the hinge portion 15: A1 and the contact portion 17, and is about 4. It is doubled. Therefore, the pressing resistance can be adjusted to a desired degree by the operator arbitrarily selecting the pressing position in the operation unit 18, and in particular, the pressing resistance can be sufficiently reduced.
  • the plunger pressing tool of the present invention may be the plunger pressing tool 1a as shown in FIGS. 12 to 15.
  • the difference between the plunger pressing tool 1a of this embodiment and the plunger pressing tool 1 described above is only the position of the contact portion 17 on the handle portion 16, and the other portions have almost the same configuration.
  • the distance between the rotation axis of the hinge portion 15: A1 and the contact portion 17 (linear top 17c) is the plunger pressing tool of the previous embodiment. It is shorter than the case of 1.
  • the same reference numerals are given to the configurations common to the plunger pressing tool 1 of the previous embodiment, and the description thereof is omitted, and only the configurations related to the difference in the position of the contact portion 17 are given. ,explain.
  • the plunger pressing tool 1a is in the state shown in FIG. 12 [a state in which the contact portion 17 (linear top 17c) is brought into contact with the rear end portion (pressing portion 36b) of the plunger 36 before the pressing operation of the plunger 36. ],
  • the contact portion 17 is located above the extension line of the central axis of the outer cylinder 31 mounted on the syringe mounting portion 13: A2.
  • the contact portion 17 (linear top portion 17c) is rotatable around the hinge portion 15 in the direction of the outer cylinder 31 mounted on the syringe mounting portion 13, and is shown in FIG. As shown, the contact portion 17 when located directly below the hinge portion 15 is located below the extension line: A2 of the central axis of the outer cylinder 31 mounted on the syringe mounting portion 13.
  • FIG. 12 shows the state at the start of operation of the plunger pressing tool 1a (at the start of pressing the plunger 36).
  • the contact portion 17 (linear top portion 17c) of the handle portion 16 is in contact with the pressing portion 36b of the plunger 36.
  • the contact portion 17 (the contact portion between the linear top portion 17c and the pressing portion 36b) is located above the extension line of the central axis of the outer cylinder 31: A2 in the vertical direction.
  • FIG. 13 shows a state in which the contact portion 17 is located directly below the hinge portion 15 (specifically, vertically below) while the plunger pressing tool 1a is being operated (while the plunger 36 is being pressed). It is shown.
  • the contact portion 17 of the handle portion 16 is an extension line of the central axis of the outer cylinder 31 mounted on the syringe mounting portion 13 (the extension line of the central axis of the syringe mounting portion 13 also substantially coincides with this). : Located slightly below A2.
  • FIG. 13 shows the locus of the contact portion 17 from the state shown in FIG. 12 to the state shown in FIG. 13, Ta1.
  • the contact portion 17 crosses the extension line of the central axis of the outer cylinder 31: A2 between FIGS. 12 and 13. That is, the contact portion 17 when located directly below the hinge portion 15 is located slightly below the extension line: A2 of the central axis of the outer cylinder 31 mounted on the syringe mounting portion 13, and the contact portion 17 Is to cross the extension line of the central axis of the outer cylinder 31: A2 by moving it from the position directly below the hinge portion 15 in the direction away from the outer cylinder 31 (rearward).
  • FIG. 14 shows the state when the operation of the plunger pressing tool 1a is completed (when the pressing of the plunger 36 is completed).
  • the contact portion 17 (the contact portion between the linear top portion 17c and the pressing portion 36b) is located slightly above the extension line of the central axis of the outer cylinder 31: A2 in the vertical direction.
  • the locus of the contact portion 17 during the operation of the plunger pressing tool 1 As shown in Ta2, the contact portion 17 is moved from the position directly below the hinge portion 15 toward the outer cylinder (in the figure). , A point indicated by Y), which crosses the extension line of the central axis of the outer cylinder 31: A2. That is, the contact portion 17 when located directly below the hinge portion 15 is located slightly below the extension line: A2 of the central axis of the outer cylinder 31 mounted on the syringe mounting portion 13, and the contact portion 17 Crosses the extension line of the central axis of the outer cylinder 31: A2 by moving in the outer cylinder direction (forward) from the position directly below the hinge portion 15.
  • FIG. 15 shows the locus of the contact portion 17 (linear top 17c) throughout the operation of the plunger pressing tool 1a: Ta (the above-mentioned locus: Ta1 and locus: Ta2 are combined).
  • the contact portion 17 when located directly below the hinge portion 15 is located slightly below the extension line of the central axis of the outer cylinder 31 mounted on the syringe mounting portion 13: A2. Further, the contact portion 17 crosses the extension line of the central axis of the outer cylinder 31: A2 at the first point: X by moving from the position directly below the hinge portion 15 toward the outer cylinder.
  • the abutting portion 17 crosses the extension line of the central axis of the outer cylinder 31: A2 at the second point: Y by moving from the position directly below the hinge portion 15 in the direction away from the outer cylinder 31. Is.
  • the distance between the first point: X and the second point: Y: L is preferably 5 to 100 mm, more preferably 20 to 70 mm.
  • the locus of the contact portion 17 (linear top 17c) throughout the operation of the plunger pressing tool 1a: Ta is the outer cylinder 31 mounted on the syringe mounting portion 13. Extension line of the central axis: Passing near A2, in other words, the distance between the contact portion 17 (linear top 17c) in the vertical direction and the extension line of the central axis of the outer cylinder 31: A2 is the operation of the plunger pressing tool 1a. Since it becomes smaller throughout the time, the pressing force can be applied to the plunger 36 in the direction of the central axis of the outer cylinder 31 even more uniformly.
  • the plunger pressing tool of the present invention may be a plunger pressing tool 1b as shown in FIG. FIG. 16 shows the locus: t of the contact portion 17 (linear top portion 17c) throughout the operation of the plunger pressing tool 1b.
  • A1 the virtual line extending in the vertical direction through A1 in the figure: a
  • s1 the hinge portion 15
  • the rotation axis: A1 virtual line: a
  • s2 the distance between the contact portion 17 at the completion of the operation: s2 are equal.
  • the distance between A2: d1 is equal to the lowest position of the contact portion 17 (the position directly below the hinge portion 15) and the extension line of the central axis of the outer cylinder 31 mounted on the syringe mounting portion 13: the distance between A2: d2. ..
  • the contact portion 17 includes a linear top portion 17c, and the linear top portion 17c linearly contacts the pressing portion 36b of the plunger 36 during operation of the plunger pressing tool. I was in contact with them, but it is not limited to this.
  • the contact portion 17 of the plunger pressing tool 1c includes a curved convex portion 17d, and the curved convex portion 17d is linear or at a certain point with the pressing portion 36b of the plunger 36. It may be in contact with each other.
  • the syringe 3 is not limited to the one inserted and mounted from the rear of the plunger pressing tool 1 (syringe mounting portion 13).
  • a predetermined opening is provided on the side portion of the syringe mounting portion 13 and the syringe 3 is inserted from there. It may be attached.
  • the plunger pressing tool of the present invention is as follows. (1) A plunger pressing tool for a syringe including an outer cylinder, a gasket slidably housed in the outer cylinder, and a plunger for moving the gasket.
  • the plunger pressing tool is provided on a grip portion having a syringe mounting portion on which the syringe can be mounted on the outer cylinder, an extending portion extending rearward from the upper portion of the grip portion, and a rear portion of the extending portion.
  • a main body portion having a hinge portion and a handle portion rotatably held by the hinge portion are provided.
  • the handle portion includes a contact portion capable of contacting the rear end portion of the plunger of the mounted syringe and an operation portion extending downward from the contact portion, and the contact portion and the operation portion.
  • the distance between the lower ends of the hinge portion is longer than the distance between the rotation axis of the hinge portion and the contact portion.
  • the contact portion is rotatable in the direction of the outer cylinder mounted on the syringe mounting portion with the hinge portion as the center, and the contact portion is located directly below the hinge portion.
  • a plunger pressing tool located on or below the extension line of the central axis of the outer cylinder mounted on the syringe mounting portion.
  • the plunger pressing tool of the present invention includes a contact portion capable of contacting the rear end portion of the plunger with a handle portion and an operation portion extending below the contact portion, and the contact portion and the lower end of the operation portion.
  • the distance between them is longer than the distance between the rotation axis of the hinge portion and the contact portion, and the contact portion can be rotated around the hinge portion in the direction of the outer cylinder mounted on the syringe mounting portion. ..
  • the operation portion so that the contact portion rotates in the outer cylinder direction
  • the plunger that comes into contact with the contact portion is removed with a smaller force than when the plunger is directly pressed. It can be moved in the tubular direction.
  • the pressing resistance of the plunger can be reduced.
  • the pressing resistance can be adjusted to a desired degree by arbitrarily selecting the position where the operator presses on the operation unit.
  • the hinge portion which is the center of rotation of the handle portion, the contact portion of the handle portion on which the plunger pressing pressure acts, and the back of the plunger.
  • the distance between the contact portion (point of action) with the end portion is maintained substantially constant. Therefore, the change in the pressing resistance during the pressing of the plunger can be suppressed.
  • the contact portion when it is located directly below the hinge portion is located on the extension line of the central axis of the outer cylinder mounted on the syringe mounting portion or slightly below it. Therefore, during the pressing of the plunger, the contact portion (point of action) between the contact portion of the handle portion on which the plunger pressing pressure acts and the rear end portion of the plunger acts on the extension line of the central axis of the outer cylinder in the vertical direction. The amount of deviation is suppressed. As a result, the pressing force can be applied to the plunger substantially uniformly in the direction of the central axis of the outer cylinder while pressing the plunger.
  • the above-mentioned embodiment may be as follows. (2) The contact portion when located directly below the hinge portion is located below the extension line of the central axis of the outer cylinder mounted on the syringe mounting portion according to the above (1). Plunger presser. (3) The contact portion when located directly below the hinge portion is located below the extension line of the central axis of the outer cylinder mounted on the syringe mounting portion, and the contact portion is The plunger pressing tool according to (1) or (2) above, which crosses an extension line of the central axis of the outer cylinder by moving from a position directly below the hinge portion in a direction away from the outer cylinder. ..
  • the contact portion when located directly below the hinge portion is located below the extension line of the central axis of the outer cylinder mounted on the syringe mounting portion, and the contact portion is The plunger pressing according to any one of (1) to (3) above, which crosses the extension line of the central axis of the outer cylinder by moving from the position directly below the hinge portion toward the outer cylinder. Ingredients.
  • the contact portion when located directly below the hinge portion is located below the extension line of the central axis of the outer cylinder mounted on the syringe mounting portion, and the contact portion is By moving from the position directly below the hinge portion toward the outer cylinder, the extension line of the central axis of the outer cylinder is crossed at the first point, and the contact portion is the hinge.

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

Abstract

L'invention concerne un outil de compression de piston (1) pour seringue (3), comprenant une partie corps principal (11), et une partie poignée (16) maintenue en rotation par une partie articulation (15) de la partie corps principal (11). La partie poignée (16) comprend une partie de contact (17) apte à venir en contact avec la partie d'extrémité arrière d'un piston (36), et une partie d'actionnement (18) s'étendant vers le bas à partir de la partie de contact (17). La distance entre la partie de contact (17) et l'extrémité inférieure de la partie d'actionnement (18) est supérieure à la distance entre l'axe de rotation de la partie articulation (15) et la partie de contact (17). En outre, la partie de contact (17) est apte à tourner autour de la partie articulation (15), et la partie de contact (17) est située sur ou au-dessous d'une ligne d'extension de l'axe central d'un cylindre externe monté (31) lorsque la partie de contact (17) est située directement sous l'articulation (15).
PCT/JP2020/006309 2019-03-20 2020-02-18 Outil de compression de piston WO2020189149A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2021506251A JP7420787B2 (ja) 2019-03-20 2020-02-18 プランジャー押圧具

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-053627 2019-03-20
JP2019053627 2019-03-20

Publications (1)

Publication Number Publication Date
WO2020189149A1 true WO2020189149A1 (fr) 2020-09-24

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ID=72520286

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PCT/JP2020/006309 WO2020189149A1 (fr) 2019-03-20 2020-02-18 Outil de compression de piston

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JP (1) JP7420787B2 (fr)
WO (1) WO2020189149A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4492576A (en) * 1982-06-15 1985-01-08 Dragan William B Dental syringe and method of packaging and dispensing a dental material
JPH0638986A (ja) * 1981-04-09 1994-02-15 Dentsply Internatl Inc カプセル状カートリッジ
JP2002535071A (ja) * 1999-01-29 2002-10-22 スリーエム イノベイティブ プロパティズ カンパニー 段付き室を有する分配カートリッジ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0638986A (ja) * 1981-04-09 1994-02-15 Dentsply Internatl Inc カプセル状カートリッジ
US4492576A (en) * 1982-06-15 1985-01-08 Dragan William B Dental syringe and method of packaging and dispensing a dental material
JP2002535071A (ja) * 1999-01-29 2002-10-22 スリーエム イノベイティブ プロパティズ カンパニー 段付き室を有する分配カートリッジ

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JP7420787B2 (ja) 2024-01-23

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