Abstract: A syringe assembly includes a plate-shaped seal member that seals a distal opening of a distal nozzle portion of a syringe; and a tubular cover member. The cover member has a base portion and a mounting portion. The mounting portion has two claw portions, two first column portions arranged on both sides of one of the two claw portions, and two second column portions arranged on both sides of the other of the two claw portions. An outer peripheral portion of the mounting portion has two outer peripheral notch portions. An inner peripheral portion of the mounting portion has two inner peripheral recessed portions.

Abstract: There are provided an intradermal needle, a packaged article, and an injection device. The intradermal needle includes: a tubular needle that has a needle tip capable of puncturing a living body; a needle hub that holds the tubular needle; a flange part that extends in a flange shape from the needle hub; and a ring projection that extends toward a leading end of the flange part and is formed in a cylindrical shape to surround the tubular needle. The flange part has a cut portion formed by partially cutting to achieve downsizing of the flange part.

Abstract: In an intradermal needle including a tubular needle that can be punctured into a living body, a packaging article, and an injection device, a pivotable protector is provided to a wide diameter part. The protector has an arm that can pivot around an axle of pivoting, and a lid. The pivoting axle part is provided to the wide diameter part, and the lid is formed to give a width smaller than a diameter of the wide diameter part. The arm keeps the lid in the open position away from the pivoting axle part and closer to an axis of the needle hub.

Abstract: A medicine administration tool configured for use in a transocular iontophoresis device for forming an electric circuit between a first electrode and a second electrode and supplying medicine to an eyeball, includes: a tubular member having a first lower end configured to face the eyeball; an inner member having a second lower end configured to face the eyeball, the inner member being accommodated in a space of the tubular member and forming a medicine accommodating chamber for accommodating the medicine between the inner member and the tubular member; and a support member movably supporting the inner member with respect to the tubular member.

Abstract: Provided are an intradermal needle having a protector that is movable from an open position near a needle hub to a closed position where a needle tip is covered, a packaged article, and an injection device. The protector has an arm that is supported in a freely pivotable manner by an axle pin positioned on the base end side of the wide diameter part of the intradermal needle, and a lid supported by the arm. With the axle of pivoting of the protector positioned near the needle hub, the lid may be housed compactly near the needle hub when the protector is in the open position.

Abstract: A medical puncture needle is configured to reliably administer a sufficient amount of a liquid medicine to thin tissue. The medical puncture needle includes: a main body having a cylindrical shape and having inside a through hole; a blade surface that has an annular shape and that is cut into a tapered shape so that a thickness of the main body reduces toward a tip part of the main body; and a blade edge that has an annular shape, the blade edge being formed at a tip of the blade surface so as to extend along a plane orthogonal to a central axis of the main body.

Abstract: A needle assembly is disclosed, which includes a needle protection member and a rotor. The rotor has a rotor body and a restriction portion. When the needle protection member in the initial state is displaced from the protection position to a use position and returns to a protection position, the restriction portion is displaced from the initial position to the lock position by the rotation of the rotor body with respect to the needle protection member. A needle hub has a displacement prevention portion that prevents the needle protection member from being displaced from the protection position to the use position again by contacting the restriction portion at the lock position.

Abstract: A liquid medicine administration device configured to prevent leakage of liquid medicine when a blockage occurs in a delivery path of the medicine includes: a liquid medicine container having an opening at a tip end through which liquid medicine can be discharged; a gasket slidable in the container for expelling the liquid medicine; a plunger to press the gasket; a housing; a drive mechanism that advances the plunger toward the container tip; and a rotation restriction unit that restricts rotation of the plunger with respect to the housing. The drive mechanism includes: a motor a feed screw rotatable in response to motor rotation; and a transmission unit that transmits drive torque from the motor to the feed screw. The transmission unit includes a canceling unit that cancels transmission of drive torque from the motor to the feed screw, when receiving torque equal to or greater than a preset cancellation torque.

Abstract: An indwelling needle for subcutaneous administration configured to be indwelled in subcutaneous tissue for subcutaneously administering a medicinal solution includes an inner needle including an inner needle main body at a distal end of which a sharp needle tip is formed, and an inner needle hub on a proximal end side of the inner needle main body, and an outer needle including an outer needle main body having a lumen through which the inner needle is inserted, and an outer needle hub on a proximal end side of the outer needle main body in which a hub insertion portion in which the inner needle hub is mounted is formed. The needle tip of the inner needle protrudes 2.5 to 9 mm in an axial direction from a distal end of the outer needle in a state in which the inner needle hub is mounted in the outer needle hub.

Abstract: This liquid medicine administration device includes a liquid medicine container, a gasket for expelling the liquid medicine in the liquid medicine container, a plunger that moves the gasket, a housing, a drive mechanism that advances the plunger, and a rotation restriction unit that restricts rotation of the plunger. The drive mechanism includes a motor and a feed screw. The plunger includes: a threaded portion threadedly engaged with the feed screw; and a plunger body that advances with feed screw rotation and that moves the gasket, while rotation of the plunger relative to the housing is restricted by the rotation restriction unit. The plunger includes a canceling mechanism that cancels transmission of a pressing force from the plunger body to the gasket when the plunger body receives an axial reaction force equal to or greater than a preset pressing force from the gasket during advancement with the feed screw rotation.

Abstract: A needle tube having a needle tip for puncturing skin; a needle hub; and a fluid-draining portion for enabling draining of a medicine. The needle hub includes: a retention part (first member) for retaining the needle tube; an insertion part into which the output portion of a syringe is inserted; and a flange-like skin contact portion that is disposed in a manner so as to cover an area surrounding the needle tube and makes contact with and/or faces the skin when a living body is punctured with the needle tube. The fluid-draining portion is disposed in the skin contact portion of the needle hub and enables a user to drain the medicine that has spilled when removing air and is held in the skin contact portion.

Abstract: A hollow medical needle is disclosed which includes: a hub part having an inner cavity connectable to a syringe; and a puncture part extending out toward an axial distal-end side of the hub part, by forming, at a distal end of the hub part, a puncture index part that includes a step perpendicular to an axial direction and is visible when abutting against a rubber stopper when the rubber stopper of a vial container is punctured by the puncture part, a position of an insertion terminal end substantially coincident with an outer surface of the rubber stopper is set at a fixed position when the puncture part is punctured into the rubber stopper.

Abstract: A syringe assembly includes a plate-shaped seal member that seals a distal opening of a distal nozzle portion of a syringe; and a tubular cover member. The cover member has a base portion and a mounting portion. The mounting portion has two claw portions, two first column portions arranged on both sides of one of the two claw portions, and two second column portions arranged on both sides of the other of the two claw portions. An outer peripheral portion of the mounting portion has two outer peripheral notch portions. An inner peripheral portion of the mounting portion has two inner peripheral recessed portions.

Abstract: A syringe holder includes: a barrel body that holds a syringe; a holder opening; deformation promoting portions; and radial movement-restricting portions. The radial movement-restricting portions are provided close to the deformation promoting portions. Being brought into contact with first portions, the radial movement-restricting portions restrict the syringe from moving in a radial direction with respect to the barrel body.

Abstract: There are provided an intradermal needle, a packaged article, and an injection device. The intradermal needle includes: a tubular needle that has a needle tip capable of puncturing a living body; a needle hub that holds the tubular needle; a flange part that extends in a flange shape from the needle hub; and a ring projection that extends toward a leading end of the flange part and is formed in a cylindrical shape to surround the tubular needle. The flange part has a cut portion formed by partially cutting to achieve downsizing of the flange part.

Abstract: In an intradermal needle including a tubular needle that can be punctured into a living body, a packaging article, and an injection device, a pivotable protector is provided to a wide diameter part. The protector has an arm that can pivot around an axle of pivoting, and a lid. The pivoting axle part is provided to the wide diameter part, and the lid is formed to give a width smaller than a diameter of the wide diameter part. The arm keeps the lid in the open position away from the pivoting axle part and closer to an axis of the needle hub.

Abstract: Provided are an intradermal needle having a protector that is movable from an open position near a needle hub to a closed position where a needle tip is covered, a packaged article, and an injection device. The protector has an arm that is supported in a freely pivotable manner by an axle pin positioned on the base end side of the wide diameter part of the intradermal needle, and a lid supported by the arm. With the axle of pivoting of the protector positioned near the needle hub, the lid may be housed compactly near the needle hub when the protector is in the open position.

Abstract: A needle assembly is disclosed, which includes a needle protection member and a rotor. The rotor has a rotor body and a restriction portion. When the needle protection member in the initial state is displaced from the protection position to a use position and returns to a protection position, the restriction portion is displaced from the initial position to the lock position by the rotation of the rotor body with respect to the needle protection member. A needle hub has a displacement prevention portion that prevents the needle protection member from being displaced from the protection position to the use position again by contacting the restriction portion at the lock position.

Abstract: An injection needle assembly includes: a needle tube; a needle hub holding the needle tube; a protector movable between a first position at which a needle tip of the needle tube is covered and a second position at which the needle tip of the needle tube is exposed; a biasing member configured to bias the protector toward the needle tip of the needle tube along an axial direction; a retaining member that supports the protector such that the protector is movable along the axial direction, wherein an abutment piece of the protector abuts on the retaining member when the protector is moved to the first position; and a restriction mechanism configured such that, after the protector has moved from the first position to the second position and back to the first position, the restriction mechanism restricts the protector from moving from the first position to the second position again.

Abstract: A needle assembly includes: a needle comprising a hollow needle tube, a needle tip at a distal end of the hollow needle tube, and a cutting face disposed adjacent to the needle tip; and a needle hub that includes a tip and a base end, and holds the needle at the needle tip. The needle hub includes a needle tip side end face from which the needle tip projects. An outer diameter of the needle is within a range of 0.15 mm to 0.20 mm, inclusive. A projection needle length extending from the needle tip side end face to the needle tip is within a range of 0.50 mm to 1.25 mm, inclusive. A needle body length extending from the needle tip side end face to a proximal end of the cutting face in within a range of 0.10 mm to 0.70 mm, inclusive.