WO2012046816A1 - アプリケータ - Google Patents
アプリケータ Download PDFInfo
- Publication number
- WO2012046816A1 WO2012046816A1 PCT/JP2011/073129 JP2011073129W WO2012046816A1 WO 2012046816 A1 WO2012046816 A1 WO 2012046816A1 JP 2011073129 W JP2011073129 W JP 2011073129W WO 2012046816 A1 WO2012046816 A1 WO 2012046816A1
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- WO
- WIPO (PCT)
- Prior art keywords
- piston
- applicator
- housing
- cap
- spring
- Prior art date
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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
- A61M37/00—Other apparatus for introducing media into the body; Percutany, i.e. introducing medicines into the body by diffusion through the skin
- A61M37/0015—Other apparatus for introducing media into the body; Percutany, i.e. introducing medicines into the body by diffusion through the skin by using microneedles
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
- A61M5/2033—Spring-loaded one-shot injectors with or without automatic needle insertion
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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
- A61M37/00—Other apparatus for introducing media into the body; Percutany, i.e. introducing medicines into the body by diffusion through the skin
- A61M37/0015—Other apparatus for introducing media into the body; Percutany, i.e. introducing medicines into the body by diffusion through the skin by using microneedles
- A61M2037/0023—Drug applicators using microneedles
-
- 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
- A61M37/00—Other apparatus for introducing media into the body; Percutany, i.e. introducing medicines into the body by diffusion through the skin
- A61M37/0015—Other apparatus for introducing media into the body; Percutany, i.e. introducing medicines into the body by diffusion through the skin by using microneedles
- A61M2037/0061—Methods for using microneedles
Definitions
- One embodiment of the present invention relates to an applicator used to assist administration of an active ingredient by a microneedle.
- an applicator that applies an impact to a microneedle for administering an active ingredient through the skin to apply the microneedle to the skin is known.
- Patent Document 1 discloses an apparatus main body, a piston for causing a penetrating member to collide with the stratum corneum, an impact spring for applying an impact force to the piston, and a pressing spring that acts between the apparatus main body and a cap.
- An applicator is described that includes a locking mechanism for cocking the piston by compressing the device body and the piston together using a compressive force and locking the piston in the cocked position.
- Patent Document 2 an applicator having a housing, a piston movable within the housing, and a cap is described.
- Patent Document 3 describes a puncture device for puncturing a puncture head equipped with an infusion cannula or a puncture tip for puncturing a patient's body. This device comprises two operating members that need to be operated simultaneously to trigger the puncture movement.
- Patent Document 4 describes a puncture device in which at least one end portion of the drive spring is arranged so as not to be fixed to either the housing side contact portion or the piston.
- the conventional applicator as shown in the above-mentioned patent document is not only large in size and inferior in portability, but also may interfere with use for children and infants. Therefore, it is desired to reduce the size and weight of the applicator.
- one aspect of the present invention aims to reduce the size and weight of the applicator.
- An applicator is an applicator for applying a microneedle to skin, and includes a cylindrical casing, a piston that transmits a biasing force of a biasing member to the microneedle, and a casing.
- a cap provided with a release mechanism for releasing the piston, the cap extending in the housing so that the release mechanism can contact the fixing means when the piston is fixed by the fixing means. It is provided to be movable along the direction.
- the cap for releasing the piston fixed against the urging force of the urging member is provided movably along the extending direction of the housing. Therefore, a member for fixing the cap to the housing, a pressing spring acting between the apparatus main body and the cap, and the like can be omitted, and the applicator can be reduced in size and weight accordingly.
- the entire cap may be accommodated in the housing.
- the applicator since the size of the applicator in the width direction is reduced by the amount of the cap that is accommodated in the housing, the applicator can be reduced in size and weight.
- the shape of the opening at the second end of the housing may be the same as the shape of the microneedle, and the size of the opening may be greater than or equal to the size of the microneedle.
- the applicator can be miniaturized according to the shape and size of the microneedle.
- the piston can be applied to the microneedle while maintaining the positional relationship parallel to the microneedle. Thereby, puncture can be performed reliably (reproducibility of puncture increases).
- the urging member may be a conical spring.
- a partition wall for partitioning the first space for accommodating the cap releasing mechanism and the second space for accommodating the piston is provided inside the housing, and the fixing means.
- claw part which is provided in the edge part of the piston rod of a piston and can engage with this peripheral part may be comprised.
- the claw portion may be formed in a tapered shape that narrows toward the end of the piston rod.
- the release mechanism is a protrusion provided on the surface of the cap facing the piston, and the protrusion is pushed out toward the center of the through hole by the claw part.
- a recess for releasing the engagement between the peripheral edge portion and the claw portion may be formed.
- the concave portion formed in the protruding portion may be mortar-shaped.
- the claw portion is drawn along the mortar shape, and the piston is released while the piston rod remains parallel to the inner wall of the housing, so that the puncture can be performed reliably (reproduction of puncture). Increase the nature).
- the biasing member is an elastic member
- the piston receives the biasing force of the elastic member in the first section that is a part of the moving section of the piston that moves toward the skin. You may move without it.
- the applicator according to another embodiment further includes a support base that supports the elastic member and transmits a biasing force to the piston in a second section different from the first section, and has pressed the piston by the biasing force. May stop at one end of the second section, so that the piston may move without receiving a biasing force in the first section.
- a member for fixing a cap for releasing a piston fixed in a state against an urging force to a housing, a pressing spring acting between the apparatus main body and the cap, and the like Therefore, the applicator can be reduced in size and weight accordingly.
- FIG. 1 It is a perspective view from the upper part of the applicator which concerns on 1st Embodiment. It is a perspective view from the downward direction of the applicator shown in FIG. It is a perspective view of the piston shown in FIG. It is a perspective view of the cap shown in FIG. (A), (b) is the VV sectional view taken on the line of FIG. 2 at the time of using a cylindrical spring. (A) shows a state where the piston is energized, and (b) shows a state after the piston is actuated. (A), (b) is the VV sectional view taken on the line of FIG. 2 when a conical spring is used.
- FIG. 10 is a perspective view from below of the applicator shown in FIG. 9. It is a perspective view of the piston shown in FIG. 11 is a sectional view taken along line XII-XII in FIG. 10. It is sectional drawing showing the state to which the nail
- FIG. 20 is a sectional view taken along line XX-XX in FIG. It is sectional drawing showing the state by which the nail
- FIG. 1 is a perspective view of the applicator 10 from above.
- FIG. 2 is a perspective view of the applicator 10 from below.
- FIG. 3 is a perspective view of the piston 20.
- FIG. 4 is a perspective view of the cap 30. 5 and 6 are sectional views taken along line VV in FIG.
- the housing 11 of the applicator 10 has a cylindrical shape.
- An annular member 11 a is fitted at both ends of the housing 11, and it can be said that the annular member 11 a is a part of the housing 11.
- the applicator 10 is desirable to have a shape that is easy to hold and can easily apply the microneedle to the skin.
- a cylindrical casing having a polygonal cross-section may be used, the outer wall may be rounded as a whole, or the cylindrical casing may be recessed or provided with a step.
- a piston 20 for impacting the microneedles applied to the skin is accommodated (see FIG. 2).
- a cap 30 for operating the piston 20 is accommodated near the other end (first end) of the housing 11 (see FIG. 1).
- the side in which the cap 30 is accommodated is defined as the upper side of the applicator 10 or the casing 11
- the side in which the piston 20 is accommodated is defined as the lower side of the applicator 10 or the casing 11.
- the piston 20 includes a disk-shaped piston plate 21 that collides with the microneedle, and a plurality of piston rods 22 that extend from the vicinity of the center of the upper surface of the piston plate 21 in a direction perpendicular to the upper surface. ing.
- the peripheral edge of the piston plate 21 protrudes radially outward in several places (protrusion 21a).
- the diameter of the piston plate 21 is substantially the same as the inner diameter of the housing 11.
- a notch is formed in the central portion of the piston plate 21 in the axial direction, and a cushioning material 23 is provided on the notch portion and the lower surface of the protruding portion 21a.
- Examples of the material of the buffer material 23 include rubber and silicon elastic bodies, and silicon is preferable in consideration of deterioration over time, but the material of the buffer material 23 is not limited at all.
- a hook-like claw portion 22 a protruding outward in the radial direction of the piston plate 21 is formed.
- the claw portion 22 a has a tapered shape that becomes thinner toward the tip of the piston rod 22.
- the cap 30 has a disk shape as shown in FIG. 4, and its diameter is substantially the same as the inner diameter of the housing 11.
- a cylindrical protrusion 31 is provided at the center of the lower surface of the cap 30, and a recess 32 is formed in the protrusion 31.
- the shape of the recessed part 32 is a mortar shape so that the nail
- a partition wall 12 for partitioning the interior into an upper part and a lower part is provided in the vicinity of the upper part inside the housing 11.
- the upper space with the partition wall 12 as a boundary is referred to as an upper space (first space) 14, and the lower space is referred to as a lower space (second space) 15.
- a circular through hole 13 is formed at the center of the partition wall 12, and the upper space 14 and the lower space 15 are connected via the through hole 13. When the cross section of the peripheral edge part of the through-hole 13 is viewed, the vicinity of the center protrudes inward from the upper part and the lower part.
- the upper part of the through hole 13 plays a role of guiding the protruding part 31 of the cap 30, and the diameter of the upper part is substantially the same as the diameter of the protruding part 31.
- the protruding portion near the center of the through-hole 13 serves to fix the piston 20 by engaging with the claw portion 22 a of the piston rod 22, and this portion is hereinafter referred to as a claw receiving portion 16.
- the lower side of the claw receiving portion 16 is formed in a tapered shape that widens downward.
- the lower portion of the through hole 13 plays a role of guiding the claw portion 22a of the piston rod 22.
- the piston 20 is accommodated in the lower space 15, and in this case, a compression spring (a biasing member or an elastic member in which energy is accumulated during compression is stored in the lower space 15 side of the partition wall 12.
- a compression spring a biasing member or an elastic member in which energy is accumulated during compression is stored in the lower space 15 side of the partition wall 12.
- One end of 40 is attached.
- the diameter of the spring 40 is larger than the diameter of the lower part of the through hole 13, and therefore the spring 40 is attached so as to surround the through hole 13.
- the piston 20 is housed in the lower space 15 so that all the piston rods 22 are accommodated inside the spring 40, and the other end of the spring 40 comes into contact with the upper surface of the piston plate 21.
- the annular member 11 a When the piston 20 is accommodated in the lower space 15, the annular member 11 a is attached to the lower end of the housing 11. A part of the annular member 11 a is molded so as to contact the protruding portion 21 a of the piston plate 21 that moves to the outside of the housing 11 by the urging force of the spring 40, so that the piston 20 moves out of the housing 11. Is prevented from jumping out.
- a cushioning material 17 is provided on the portion of the casing 11 (annular member 11a) that contacts the protruding portion 21a of the piston plate 21. Examples of the material of the buffer material 17 include rubber and silicon elastic bodies, and silicon is preferable in consideration of deterioration over time, but the material of the buffer material 17 is not limited at all.
- the shock-absorbing sound when the actuated piston 20 stops at the lower end of the housing 11 can be reduced by the shock-absorbing material 23 on the piston 20 side and the shock-absorbing material 17 on the housing 11 side.
- the piston 20 can be fixed in the lower space 15 while resisting the biasing force of the spring 40.
- the applicator 10 is in the state of FIG. 5B
- the claw portions 22 a of the piston rods 22 abut against the claw receiving portions 16.
- the vicinity of the claw portions 22 a of the piston rods 22 bends toward the center of the through hole 13, and the claw portion 22 a passes through the claw receiving portion 16 and reaches the upper portion of the through hole 13. Then, as shown in FIG.
- the claw portion 22 a is hooked on the claw receiving portion 16, whereby the piston 20 is fixed in a state against the urging force of the spring 40. Therefore, it can be said that the claw receiving portion 16 (the peripheral portion of the through hole 13) and the claw portion 22a of each piston rod 22 are fixing means. Note that fixing the piston 20 in this way is also called cocking.
- the cap 30 is accommodated in the upper space 14 with the protruding portion 31 facing the partition wall 12.
- the annular member 11a is attached to the end thereof, thereby preventing the cap 30 from jumping out of the housing 11.
- the cap 30 Since the position of the cap 30 is not fixed in the upper space 14, the cap 30 can freely move in the upper space 14 along the extending direction (vertical direction) of the housing 11. Therefore, when the applicator 10 is tilted so that the cap 30 is positioned above the piston 20 fixed against the biasing force of the spring 40, as shown in FIG. The protruding portion 31 contacts the claw portion 22 a of the piston 20. That is, the cap 30 is movable along the extending direction of the housing 11 in the upper space 14 so that the protruding portion 31 can come into contact with the claw portion 22a when the piston 20 is fixed by the claw portion 22a. Is provided. As described above, when the cap 30 is incorporated into the housing 11, a pressing spring or the like can be omitted, so that the number of parts can be reduced.
- the transverse elastic modulus As parameters relating to the energy of the piston 20 operated by the biasing force of the spring 40, the transverse elastic modulus, the wire diameter, the number of turns, the average coil diameter, the distance indicating how much the spring 40 is reduced from the natural length, the speed of the piston, the mass of the spring , And the mass of the piston.
- Modulus of transverse elasticity is determined by the material of the spring, if stainless 68500N / mm 2, a 78500N / mm 2 if piano wire (iron).
- the assumed values of other parameters are as follows. That is, the wire diameter is 0.1 to 5 mm, the number of turns is 1 to 20, the average coil diameter is 1 to 30 mm, the distance is 1 to 100 mm, the speed is 0.1 to 50 m / s, and the mass of the spring is 0.1 to The mass of the piston is 0.1 to 20 g.
- Equation (1) shows the relationship between the spring constant, the shape of the spring, and the material
- Equation (2) shows the relationship between the mass and size of the spring
- Equation (3) shows the relationship between spring energy and kinetic energy
- Equation (4) shows the relationship between piston speed, energy, and mass.
- G is a modulus of transverse elasticity (N / m 2)
- d is the wire diameter (m)
- n is the number of turns
- D is the average coil diameter (m)
- k is the spring constant (N / m)
- x is Distance (m)
- v is velocity (m / s)
- l is spring length (m) when extended
- ⁇ density (kg / m 3 )
- m spring mass (kg)
- M is piston Mass (kg).
- the shape of the spring is not limited to this.
- a conical spiral spring 40A also referred to as “conical spring” in this specification
- the end of the cone spring 40A having the smaller diameter is attached to the partition wall 12 so as to cover the through hole 13, and the end having the larger diameter ( The end corresponding to the bottom of the cone) hits the upper surface of the piston plate 21.
- the conical spring 40A is used, the length in the expansion / contraction direction of the spring at the time of compression can be suppressed up to the wire diameter of the spring, so in consideration of the numerical values derived from the above formulas (1) to (4), The size (height) of the housing 11 can be reduced, and the applicator 10 can be reduced in size and weight.
- the dimensions of the applicator 10 can be determined as follows according to the dimensions of the microneedle. However, how to determine the dimensions is not limited to the following.
- the size of the applicator 10 is reduced according to the size of the microneedle. be able to. If the lower opening is molded in this way, when the applicator 10 is positioned on the microneedle, the applicator 10 does not shift in the radial direction (width direction) with respect to the microneedle.
- the piston 20 can be applied to the microneedle while maintaining the parallel positional relationship. Thereby, puncture can be performed reliably (reproducibility of puncture increases).
- the minimum inner diameter of the opening may be greater than or equal to the outer diameter of the microneedle.
- the applicator 10 having a minimum inner diameter of the lower end portion of the housing 11 of about 26 mm and an outer diameter and height of the housing 11 of about 30 mm may be manufactured.
- the dimensions of the applicator 10 are not limited to this example.
- the outer diameter may be determined in the range of 30 to 50 mm, or the height may be determined in the range of 10 to 50 mm.
- the material of the applicator is not limited, but a material having a strength capable of maintaining the biasing force of the spring 40 is desirable.
- the following materials can be used.
- materials for the casing 11 and the cap 30 in addition to synthetic or natural resin materials such as ABS resin, polystyrene, polypropylene, polyacetal (POM), etc., silicon, silicon dioxide, ceramic, metal (stainless steel, titanium, nickel, Molybdenum, chromium, cobalt, etc.) may be used.
- synthetic or natural resin materials such as ABS resin, polystyrene, polypropylene, polyacetal (POM), etc.
- the casing 11, the cap 30, and the piston 20 may be provided with air holes for escaping air, thereby reducing air resistance and reducing weight.
- FIG. 7 is a diagram for explaining a case where the auxiliary tool H is used when the applicator 10 is used.
- FIG. 8 is a view for explaining how to use the applicator 10.
- the piston 20 is pushed toward the inside of the applicator 10 with a finger, and the piston 20 is fixed in a state resisting the urging force of the spring 40.
- the piston 20 may be pushed up by hand, or the piston 20 may be pushed up using the auxiliary tool H as shown in FIG.
- the shape of this auxiliary tool H is not limited to the example of FIG.
- the applicator 10 will be in the state shown to Fig.5 (a). Since the claw portion 22a is formed in a tapered shape that narrows toward the end of the piston rod 22, the user can easily fix the piston 20 by engaging the claw portion 22a with the claw receiving portion 16 with a small force. In addition, it is possible to know the completion of fixing by a “click” sound. By adjusting the inclination of the tapered shape on the lower side of the claw receiving portion 16, it is possible to increase or decrease the force applied when the piston 20 is fixed.
- the applicator 10 is positioned and held on the microneedle D applied to the skin S, and the cap 30 is pushed toward the inside of the applicator 10 with a finger (indicated by an arrow A). Push in the direction).
- the microneedle D may be affixed on the skin with the cover agent C as shown in FIG.
- the protruding portion 31 is a release mechanism for releasing the fixed piston 20 in a state in which the protruding portion 31 resists the biasing force of the spring 40.
- the piston 20 (applicator 10) is moved only when the claw portion 22a is drawn along the mortar shape and a certain force is applied to the cap 30. Operate. Therefore, no matter who administers, a constant impact force is transmitted to the microneedle D, and puncture can be performed reliably (reproducibility of puncture is improved).
- the force required to release the piston 20 can be adjusted by changing the shape of the recess 32 and the shape of the claw portion 22a.
- the piston 20 can be released from the fixed state with a small force by making the inclination of the taper shape of the claw portion 22a steep and adjusting the inclination of the mortar shape of the recess 32 accordingly.
- the urging force of the spring 40 is transmitted to the microneedle D through the piston 20, and the microprotrusions of the microneedle D perforate the skin. Then, the active ingredient applied to the microneedle D is administered into the body through the microprotrusions.
- the piston 20 can be fixed again in a state against the urging force of the spring 40. Therefore, the applicator 10 can be used any number of times.
- the cap 30 for releasing the piston 20 fixed against the urging force of the spring 40 is provided movably along the extending direction of the housing 11. . Therefore, a member for fixing the cap 30 to the casing 11, a pressing spring that acts between the apparatus main body and the cap 30, and the like can be omitted, and the applicator can be downsized accordingly. Further, by reducing the size of the applicator 10, the weight can be reduced, and the portability can be improved.
- the size of the applicator 10 in the width direction (radial direction) can be suppressed by the amount that the cap 30 is accommodated in the housing 11, so that the applicator 10 can be reduced in size and weight. it can.
- the claw receiving portion 16 and the claw portion 22a constitute a fixing means, and the release portion is constituted by the protruding portion 31 in which the concave portion 32 is formed, the number of parts required for the applicator can be reduced. Accordingly, the applicator can be reduced in size and weight.
- FIG. 9 is a perspective view of the applicator 100 from above.
- FIG. 10 is a perspective view of the applicator 100 from below.
- FIG. 11 is a perspective view of the piston 120.
- 12 is a cross-sectional view taken along line XII-XII in FIG. 10, and
- FIG. 13 is a cross-sectional view showing a state where the claw portion shown in FIG. 12 is fixed.
- the housing 101 of the applicator 100 has a cylindrical shape.
- the shape of the housing is changed or the surface of the housing is processed in the same manner as the applicator 10 described above. It's okay.
- a piston 120 for impacting the microneedles applied to the skin is accommodated (see FIG. 10).
- a cap 130 for operating the piston 120 is accommodated near the other end (first end) of the housing 101 (see FIG. 9).
- the side in which the cap 130 is accommodated is defined as the upper side of the applicator 100 or the casing 101
- the side in which the piston 120 is accommodated is defined as the lower side of the applicator 100 or the casing 101.
- An annular member 101a is fitted into the upper end of the housing 101, and the lower end portion of the housing 101 is formed in a tapered shape that widens downward.
- the piston 120 includes a disk-shaped piston plate 121 that collides with the microneedle, and a plurality of piston rods 122 extending from the vicinity of the center of the upper surface of the piston plate 121 in a direction orthogonal to the upper surface. ing. At the tip of each piston rod 122, a hook-like claw portion 122a protruding outward in the radial direction of the piston plate 121 is formed.
- the claw portion 122 a has a tapered shape that becomes narrower toward the tip of the piston rod 122.
- a plurality of air holes 121 a for releasing air are formed in the piston plate 121.
- the cap 130 is the same as the cap 30 in the first embodiment, and includes a protrusion 131 in which a mortar-shaped recess 132 is formed.
- a partition wall 112 for partitioning the interior into an upper part and a lower part is provided.
- the upper space with the partition wall 112 as a boundary is referred to as an upper space (first space) 114
- the lower space is referred to as a lower space (second space) 115.
- a circular through-hole 113 is formed at the center of the partition wall 112, and the inner cylinder 116 is attached to the through-hole 113 in a state where it is inserted from the bottom to the middle of the through-hole 113.
- the inner wall of the inner cylinder 116 is formed in a tapered shape that widens downward, and plays a role of guiding the vertical movement of the piston rod 122.
- the upper part of the through hole 113 serves to guide the protruding part 131 of the cap 130, and the diameter of the upper part is the same as the diameter of the protruding part 131.
- the upper end of the inner cylinder 116 positioned near the center of the through hole 113 serves to fix the piston 120 by engaging with the claw portion 122a of the piston rod 122, and this portion is hereinafter referred to as a claw receiving portion 117.
- the lower space 115 includes a piston 120, a compression spring (biasing member or elastic member; hereinafter simply referred to as “spring”) 140 that applies a biasing force to the piston 120, and an annular spring base that supports the spring 140 from below. (Support stand) 150 is accommodated.
- a plurality of guides 160 are provided on the inner wall of the lower space 115 for sliding the spring base 150 in the vertical direction by a predetermined range.
- Each guide 160 extends from the lower end of the housing 101 to the vicinity of the lower end of the inner cylinder 116, but the lower half area of the guide 160 (lower part of the guide 160) is the area in the remaining upper half (upper part of the guide 160). ) Is thicker than On the other hand, a notch (not shown) for engaging with the upper portion of the guide 160 is formed on the outer periphery of the spring base 150. Therefore, the spring base 150 can be slid in the vertical direction only at the upper part of the guide 160.
- the spring 140 is accommodated in the lower space 115 so as to surround the inner cylinder 116.
- the upper end of the spring 140 is attached to the lower surface of the partition wall 112, and the lower end thereof is in contact with the upper surface of the spring base 150.
- the piston 120 is accommodated in the lower space 115 after the spring 140 and the spring base 150 are accommodated in the lower space 115.
- the diameter of the piston plate 121 is substantially the same as the inner diameter of the housing 101 restricted by the lower portion of the guide 160. Further, since the diameter of the piston plate 121 is larger than the inner diameter of the spring base 150, the piston plate 121 is always positioned below the spring base 150.
- the piston 120 can be fixed in the lower space 115 while resisting the urging force of the spring 140.
- the applicator 100 is in the initial state (see FIG. 12)
- the piston plate 121 is pushed from the outside of the housing 101 against the biasing force of the spring 140
- the claw portions 122a of the piston rods 122 come out of the inner cylinder 116.
- the piston 120 is fixed in a state of resisting the biasing force of the spring 140. Therefore, it can be said that the claw receiving portion 117 and the claw portion 122a of each piston rod 122 are fixing means.
- the cap 130 is accommodated in the upper space 114 such that the protruding portion 131 faces the partition wall 112.
- the annular member 11a is attached to the end portion thereof, thereby preventing the cap 130 from jumping out of the housing 101.
- the accommodation method of the cap 130 is the same as that of the first embodiment. Therefore, the cap 130 extends in the extending direction (vertical direction) of the housing 101 in the upper space 114 so that the protruding portion 131 can come into contact with the claw portion 122a when the piston 120 is fixed by the claw portion 122a. It is provided to be movable along.
- Parameters relating to the spring 140 and the piston 120 can be determined in the same manner as in the first embodiment. Also in this embodiment, the above theoretical formulas (1) to (4) regarding the spring and the piston hold.
- the size of the applicator 100 may be determined according to the size of the microneedle, or may be determined from another viewpoint. Further, the material of the applicator 100 can be selected as in the first embodiment.
- FIG. 14 is a view for explaining how to use the applicator 100.
- the initial state of the applicator 100 is as shown in FIG.
- the piston 120 in the initial state is pushed toward the inside of the applicator 100 with a finger, and the piston 120 is fixed in a state of resisting the biasing force of the spring 140.
- the piston 120 may be pushed up by hand, or may be pushed up using an auxiliary tool as in the first embodiment.
- the applicator 100 to which the piston 120 is fixed is in the state shown in FIG. Since the inner wall of the inner cylinder 116 is formed in a taper shape that becomes narrower toward the upper end (the claw receiving portion 117), the user can easily engage the claw portion 122a with the claw receiving portion 117 with a small force and easily perform the piston operation. 120 can be fixed. In addition, the user can know the completion of fixing with a clicking sound. By adjusting the inclination of the tapered shape of the inner cylinder 116, it is possible to increase or decrease the force applied when the piston 120 is fixed.
- the applicator 100 is positioned and held on the microneedle D applied to the skin S, and the cap 130 is pushed toward the inside of the applicator 100 with a finger (indicated by an arrow A). Push in the direction).
- the microneedle may be attached to the skin with the cover agent C.
- the protruding part 131 is a release mechanism for releasing the piston 120 fixed in a state in which the protruding part 131 resists the urging force of the spring 140.
- the piston 120 Since the mechanism by which the piston 120 is actuated by the cap 130 is the same as in the first embodiment, in this embodiment as well, a constant impact force is applied to the microneedle D regardless of the user, and the puncture reproducibility is improved. Can do.
- the piston 120 since the spring base 150 slides only on the upper part of the guide 160, the piston 120 is attached to the spring 140 via the spring base 150 only in a section (second section) along the upper part of the guide 160. The piston 120 moves while receiving the force (the piston 120 is pushed by the spring base 150 in the second section). Then, after the spring base 150 stops at the lower end of the second section, the piston 120 moves without receiving the urging force of the spring 140 in a section (first section) along the lower portion of the guide 160. Then, the piston 120 collides with the microneedle D at the lower end of the applicator 100 (see FIG. 14).
- the force necessary to release the piston 120 can be adjusted by changing the shape of the recess 132 and the shape of the claw portion 122a. For example, if the inclination of the taper shape of the claw portion 122a is made steep and the inclination of the mortar shape of the recess 132 is adjusted accordingly, the piston 120 can be released from the fixed state with a small force.
- the urging force of the spring 140 is transmitted to the microneedle D by the piston 120, and the microprotrusions of the microneedle D perforate the skin. Then, the active ingredient applied to the microneedle D is administered into the body through the microprotrusions.
- the piston 120 If the piston 120 is pushed toward the inside of the applicator 100 after using the applicator 100 as described above, the piston 120 can be fixed again in a state of resisting the biasing force of the spring 140. Therefore, the applicator 100 can be used as many times as the applicator 10.
- the cap 130 for releasing the piston 120 fixed against the urging force of the spring 140 is provided movably along the extending direction of the housing 101. Therefore, a member for fixing the cap 130 to the housing 101, a pressing spring that acts between the apparatus main body and the cap 130, and the like can be omitted, and the applicator can be downsized accordingly. Further, by reducing the size of the applicator 100, the weight can be reduced, and the portability can be improved.
- the size in the width direction (radial direction) of the applicator 100 is suppressed by the amount that the cap 130 is accommodated in the housing 101, so that the applicator 100 can be reduced in size and weight. it can.
- the claw receiving portion 117 and the claw portion 122a constitute a fixing means, and the protrusion 131 having the concave portion 132 constitutes a release mechanism, the number of parts required for the applicator can be reduced. Accordingly, the applicator can be reduced in size and weight.
- the puncture performance of two applicators corresponding to the applicators 10 and 100 described above was compared.
- the puncture performance was evaluated by administering ovalbumin (Ovalbumin: OVA) to in vitro (human skin) using a microneedle and determining the amount of OVA transferred to human skin.
- OVA ovalbumin
- the transfer amount is the amount of OVA adhered to the microneedles that is administered to the skin.
- an applicator having the same configuration as the applicator 10 (first embodiment) is referred to as “type A”
- an applicator having the same configuration as the applicator 100 (second embodiment) is “type B”. That's it.
- a common spring having a spring constant k of 6374.5 N / m was used.
- the microneedles were made of polylactic acid, the area of the substrate was 1.13 cm 2 , and the number of microprojections (needles) was 640.
- the height of the microprotrusions was 500 ⁇ m, and the area of the flat portion at the tip was 64 to 144 ⁇ m 2 .
- the coating range when OVA was applied to each microprotrusion was a range of about 180 ⁇ m including the apex of the microprotrusion.
- the total amount (initial content) of OVA applied to the microneedles was 65.2 ⁇ 6.3 ⁇ g.
- FIG. 15 is a graph showing the shift amount for each of types A and B.
- Type B had a constant transfer amount and higher puncture reproducibility than type A.
- Type A since the lower end of the spring is in contact with the upper surface of the piston plate, even when the piston collides with the microneedle, the spring presses the piston against the skin, and as a result, a repulsive force acts on the applicator body.
- Type B since the lower end of the spring hits the spring base instead of the piston plate, the extension of the spring stops halfway, and thereafter, only the piston moves to the lower end of the applicator and collides with the microneedle. Since the piston is separated from the applicator body at the time of the collision, the applicator is not subjected to a reaction due to the collision. Therefore, the reproducibility of puncture can be further enhanced by using Type B, in which the reaction of the spring to the applicator body is blocked.
- the piston speed profile for Type B is shown in the graph of FIG.
- the vertical axis and horizontal axis of this graph are the piston speed (m / s) and the elapsed time (seconds) from the start of pressing the cap, respectively. From about 0.05 seconds to just before 0.07 seconds, the speed is constant at about 4 m / s, which indicates that the piston has moved without receiving the spring bias during that time period. ing.
- the spring is used as the biasing member, but the biasing member is not limited to this.
- a mechanism for causing a piston to collide with a microneedle by injection of compressed gas may be employed as the biasing member.
- the outer wall of the housing 11 is smoothly molded.
- a rod-like raised portion 18 formed along the extending direction of the housing 11 is connected to the outer wall of the housing 11. You may provide in a child shape. If such a housing
- a housing 51 of the applicator 50 shown in FIG. 18 includes an upper portion 51a and a lower portion 51b provided with a partition wall 52 similar to the partition wall 12 in the first embodiment.
- the applicator 50 accommodates the cap 30 in the upper part 51a of the casing 51, and accommodates the piston 60 and the spring 40 in the lower part 51b of the casing 51, and then couples the lower part 51b and the upper part 51a.
- the peripheral edge 53 that forms the lower opening of the casing 51 is formed in a tapered shape that widens downward on both the outer side and the inner side in the radial direction.
- the piston 60 and the piston 20 in the first embodiment have the same piston rod configuration but different piston plate configurations.
- the peripheral edge portion 61 a of the piston plate 61 is formed so as to come into contact with the inside of the peripheral edge portion 53 when the piston 60 is operated, thereby preventing the piston 60 from jumping out of the housing 51.
- Such a modification can also be applied to the applicator 100 according to the second embodiment.
- the applicator 100 according to the second embodiment may be modified as shown in FIGS. 19 to 21 correspond to FIGS.
- the applicator 100 in this modification does not have the annular member 101a, but includes a hood 170 that covers the upper portion of the housing 101 instead.
- a cap 130 is attached to the upper wall of the hood 170. Therefore, the hood 170 and the cap 130 are integrated.
- the hood 170 and the cap 130 may be collectively referred to as a “cap”.
- a hood 170 By introducing such a hood 170, the user can push down the cap 130 by grasping and moving the hood 170 downward, so that the piston 120 can be operated more easily (for example, easily with one hand). Can do. Further, since the piston 120 can be operated by pushing the cap 130 with a preferable load (for example, 400 to 600 g, or about 500 g), a constant load can be obtained without applying an extra load to the skin against which the applicator 100 is applied. The urging force can be transmitted to the microneedle. Such a hood can be similarly applied to the applicator 10 according to the first embodiment.
- a preferable load for example, 400 to 600 g, or about 500 g
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Abstract
Description
まず、図1~6を用いて、第1実施形態に係るアプリケータ10の構造を説明する。図1はアプリケータ10の上方からの斜視図である。図2はアプリケータ10の下方からの斜視図である。図3はピストン20の斜視図である。図4はキャップ30の斜視図である。図5,6は図2のV-V線断面図である。
次に、図9~13を用いて、第2実施形態に係るアプリケータ100の構造を説明する。図9はアプリケータ100の上方からの斜視図である。図10はアプリケータ100の下方からの斜視図である。図11はピストン120の斜視図である。図12は図10のXII-XII線断面図であり、図13は、図12に示す爪部が固定された状態を表す断面図である。
Claims (10)
- 皮膚にマイクロニードルを適用させるためのアプリケータであって、
筒状の筐体と、
付勢部材の付勢力を前記マイクロニードルに伝えるピストンと、
前記筐体内において前記ピストンを前記付勢部材の付勢力に抗した状態で固定するための固定手段と、
前記筐体の第1端部付近に設けられたキャップであって、前記ピストンと対向する面に、前記固定手段により固定された前記ピストンを解放するための解放機構が設けられた、該キャップと
を備え、
前記ピストンが前記固定手段により固定されているときに前記解放機構が該固定手段に接触可能なように、前記キャップが前記筐体の延び方向に沿って移動自在に設けられている、
ことを特徴とするアプリケータ。 - 前記キャップの全体が前記筐体内に収容されている、
ことを特徴とする請求項1に記載のアプリケータ。 - 前記筐体の第2端部における開口の形状が前記マイクロニードルの形状と同じであり、該開口の寸法が該マイクロニードルの寸法以上である、
ことを特徴とする請求項1又は2に記載のアプリケータ。 - 前記付勢部材が円錐状のばねである、
ことを特徴とする請求項1~3のいずれか一項に記載のアプリケータ。 - 前記筐体の内部には、前記キャップの前記解放機構を収容する第1の空間と前記ピストンを収容する第2の空間とを仕切るための仕切壁が設けられ、
前記固定手段が、前記仕切壁に形成された貫通孔の周縁部と、前記ピストンのピストンロッドの端部に設けられ該周縁部と係合可能な爪部とから構成される、
ことを特徴とする請求項1~4のいずれか一項に記載のアプリケータ。 - 前記爪部が、前記ピストンロッドの端部に向けて細くなるテーパ状に形成されている、
ことを特徴とする請求項5に記載のアプリケータ。 - 前記解放機構が、前記ピストンと対向する前記キャップの面に設けられた突出部であり、
前記突出部には、前記爪部を前記貫通孔の中心に向けて押し出すことで前記仕切壁の周縁部と前記爪部との係合を解除するための凹部が形成されている、
ことを特徴とする請求項5又は6に記載のアプリケータ。 - 前記突出部に形成された前記凹部がすり鉢状になっている、
ことを特徴とする請求項7に記載のアプリケータ。 - 前記付勢部材が弾性部材であり、
前記皮膚に向かって移動する前記ピストンの移動区間の一部である第1の区間において、該ピストンが前記弾性部材の付勢力を受けることなく移動する、
請求項1~8のいずれか一項に記載のアプリケータ。 - 前記弾性部材を支持するとともに、前記第1の区間とは異なる第2の区間において前記付勢力を前記ピストンに伝える支持台をさらに備え、
前記付勢力により前記ピストンを押していた前記支持台が前記第2の区間の一端において止まることで、該ピストンが前記第1の区間において前記付勢力を受けることなく移動する、
請求項9に記載のアプリケータ。
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JP2012537766A JP5885667B2 (ja) | 2010-10-07 | 2011-10-06 | アプリケータ |
EP11830748.7A EP2626107B1 (en) | 2010-10-07 | 2011-10-06 | Applicator |
US13/877,275 US20130226098A1 (en) | 2010-10-07 | 2011-10-06 | Applicator |
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JP2010227684 | 2010-10-07 | ||
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WO2012046816A1 true WO2012046816A1 (ja) | 2012-04-12 |
Family
ID=45927809
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PCT/JP2011/073129 WO2012046816A1 (ja) | 2010-10-07 | 2011-10-06 | アプリケータ |
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US (1) | US20130226098A1 (ja) |
EP (1) | EP2626107B1 (ja) |
JP (1) | JP5885667B2 (ja) |
TW (1) | TWI617331B (ja) |
WO (1) | WO2012046816A1 (ja) |
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EP2937111A4 (en) * | 2012-12-21 | 2016-12-21 | Hisamitsu Pharmaceutical Co | APPLICATOR |
KR102158891B1 (ko) * | 2012-12-21 | 2020-09-22 | 히사미쓰 세이야꾸 가부시키가이샤 | 어플리케이터 |
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JPWO2015068702A1 (ja) * | 2013-11-05 | 2017-03-09 | 久光製薬株式会社 | アプリケータ |
US10086183B2 (en) | 2013-11-05 | 2018-10-02 | Hisamitsu Pharmaceutical Co., Inc. | Applicator |
JP2015089443A (ja) * | 2013-11-06 | 2015-05-11 | 久光製薬株式会社 | アプリケータ |
US10328248B2 (en) | 2014-04-30 | 2019-06-25 | Sorrento Therapeutics, Inc. | Controller portion of transdermal drug delivery apparatus and methods |
JP2017516513A (ja) * | 2014-04-30 | 2017-06-22 | キンバリー クラーク ワールドワイド インコーポレイテッド | 経皮的薬物送達装置のコントローラ部分および方法 |
JPWO2016098694A1 (ja) * | 2014-12-16 | 2017-09-21 | 凸版印刷株式会社 | 針状体 |
US10518072B2 (en) | 2014-12-16 | 2019-12-31 | Toppan Printing Co., Ltd. | Needle-shaped body |
WO2016098694A1 (ja) * | 2014-12-16 | 2016-06-23 | 凸版印刷株式会社 | 針状体 |
CN108136165A (zh) * | 2015-09-02 | 2018-06-08 | 久光制药株式会社 | 施放器 |
CN108136165B (zh) * | 2015-09-02 | 2020-11-06 | 久光制药株式会社 | 施放器 |
US10828480B2 (en) | 2015-09-02 | 2020-11-10 | Hisamitsu Pharmaceutical Co., Inc. | Applicator |
WO2023214581A1 (ja) * | 2022-05-02 | 2023-11-09 | コスメディ製薬株式会社 | マイクロニードル用アプリケータ |
Also Published As
Publication number | Publication date |
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JPWO2012046816A1 (ja) | 2014-02-24 |
TW201231109A (en) | 2012-08-01 |
US20130226098A1 (en) | 2013-08-29 |
EP2626107A4 (en) | 2014-04-16 |
EP2626107B1 (en) | 2021-05-26 |
TWI617331B (zh) | 2018-03-11 |
EP2626107A1 (en) | 2013-08-14 |
JP5885667B2 (ja) | 2016-03-15 |
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