Abstract: A needle-equipped outer cylinder includes: a needle tube; a joining member comprising: a needle tube accommodation hole that accommodates a proximal end side portion of the needle tube and penetrates the joining member from a distal end of the joining member to a proximal end of the joining member, and a joining outer peripheral portion provided on an outer peripheral portion of the needle tube accommodation hole; and an outer cylinder member comprising: a distal end joint that comprises an inner cavity that receives the joining outer peripheral portion of the joining member from a distal end side, and a projection located at a proximal end portion of the inner cavity and projecting into the inner cavity. The joining member comprises, at a proximal end portion of the joining member, an abutment portion that abuts the projection of the outer cylinder member.

Abstract: A liquid medicine administration device includes a prefilled syringe and a gasket biasing member assembly. The biasing member assembly includes: a gasket pressing member configured to press a gasket; a flange attachment member attached to the prefilled syringe; a biasing member housed between the pressing member and the flange attachment member; and an operating member including an engagement holding portion. The pressing member includes an engagement portion to be engaged with the flange attachment member. When the engagement holding portion is located at an abutment position, deformation of a deformable portion is inhibited by abutment between the engagement holding portion and an abutment portion of a deformable portion, and engagement between the engagement portion and the attachment member body portion is held.

Abstract: A grip for a syringe barrel to be attached to a syringe barrel that includes a tubular body, and a flange provided on the tubular body and projecting outward, includes a flange receiving portion configured to receive the flange, and a side wall portion extending in a distal end direction from the flange receiving portion and configured to partially cover a proximal end portion of the tubular body adjacent to the flange. The side wall portion includes a fitting portion configured to be fitted to the proximal end portion of the tubular body, and an airflow portion configured to allow a sterilization gas to flow to an outer surface of the tubular body covered by the side wall portion.

Abstract: A plunger kit including a piston to be slidably inserted into a liquid medicine storage chamber and a plunger rod to be mounted to the piston, a syringe kit, and a prefilled syringe, in which there is formed, on a tip end of the plunger rod, a mounting part having a shaft part that projects to a tip end side with a substantially constant diameter, an engagement part forming an engagement surface increased in diameter from a tip end of the shaft part in a radial direction and formed substantially perpendicular to an axial direction, and a conical part formed on a tip end side of the engagement part and reduced in diameter in a tapered manner toward a tip end in the axial direction, and a cut-out part obtained by cutting out a part in a circumferential direction is formed on the engagement part.

Abstract: A protective device, for covering a needle tip of a needle of a medical instrument after puncturing of a puncture object by the needle, includes an inner cylinder, an outer cylinder, and a spring. The outer cylinder receives a cam structure of the inner cylinder and has a guide passage structure that includes one or more guide passages. The outer cylinder is provided with a lateral top part and a distal-end inclined edge part as resistance force generating parts for causing the inner cylinder to generate a resistance force at a puncture position or in the vicinity of the puncture position.

Abstract: An injector includes a hollow needle; a main body unit including a needle holding portion that holds the needle; and a protection device configured to cover the needle before and after puncturing a puncture target with the needle. The protection device includes: an inner member attached to the needle holding portion and being freely rotatable around an outer periphery of the needle holding portion; and an outer member configured to (i) cover an order side of the needle and the inner member before puncturing, (ii) expose the needle by moving toward a proximal end side relative to the main body unit at a time of puncturing, and (iii) cover a distal end of the needle by moving toward a distal end side relative to the main body unit after puncturing.

Abstract: A syringe assembly includes a barrel, and a seal cap mounted to the barrel. The seal cap includes a closed distal end portion, an open proximal end portion, a hollow portion including a barrel end storage portion configured to store a barrel end portion, and a puncture needle storage portion extending from the barrel end storage portion, an insertion allowing portion configured to receive a puncture needle tip of a puncture needle guided to the distal end of the puncture needle storage portion, and a projection portion formed on an inner surface of the barrel end storage portion. The projection portion has a top portion, a distal inclined portion, and a proximal inclined portion extending from the top portion toward the open proximal end portion. A non-stick surface for inhibiting sticking to a barrel end portion of the barrel is formed on an inner surface of the projection portion.

Abstract: A needle-equipped outer cylinder includes: a needle tube; a joining member comprising: a needle tube accommodation hole that accommodates a proximal end side portion of the needle tube and penetrates the joining member from a distal end of the joining member to a proximal end of the joining member, and a joining outer peripheral portion provided on an outer peripheral portion of the needle tube accommodation hole; and an outer cylinder member comprising: a distal end joint that comprises an inner cavity that receives the joining outer peripheral portion of the joining member from a distal end side, and a projection located at a proximal end portion of the inner cavity and projecting into the inner cavity. The joining member comprises, at a proximal end portion of the joining member, an abutment portion that abuts the projection of the outer cylinder member.

Abstract: A liquid medicine administration device includes a prefilled syringe and a gasket biasing member assembly. The biasing member assembly includes: a gasket pressing member configured to press a gasket; a flange attachment member attached to the prefilled syringe; a biasing member housed between the pressing member and the flange attachment member; and an operating member including an engagement holding portion. The pressing member includes an engagement portion to be engaged with the flange attachment member. When the engagement holding portion is located at an abutment position, deformation of a deformable portion is inhibited by abutment between the engagement holding portion and an abutment portion of a deformable portion, and engagement between the engagement portion and the attachment member body portion is held.

Abstract: A syringe assembly includes: a syringe including: a puncture needle having a needle tip, and a barrel holding the puncture needle; a hollow cylindrical grip fitted on an outer peripheral portion of the barrel; and a protective device including a hollow cylindrical cover member that is axially displaceable relative to the barrel, the protective device being configured such that the cover member covers at least part of the puncture needle in an initial state, the cover member is displaceable in a proximal direction relative to the barrel by being pressed against an object to be punctured when the puncture needle is inserted into the object to be punctured, and the cover member is configured to cover the needle tip after insertion of the puncture needle into the object to be punctured.

Abstract: A protection device is attachable to a syringe that includes a needle. The protection device includes an inner cylinder having a cam structure with at least one protrusion; an outer cylinder that covers the inner cylinder and the needle; and a spring. The outer cylinder has a guiding path structure including at least one guiding path. The guiding path structure includes an elastic member allowing the cam structure to move; and an inner edge provided at a position in a peripheral wall of the outer cylinder different from the elastic member. The inner edge is configured to regulate movement of the cam structure by engaging with the cam structure.

Abstract: A method of assembling a syringe with needle is provided. The method may include preparing a mold for forming a tube hole of a main body of the syringe, a first part and a second part for forming a connection part of the syringe, and a third part for forming a close contact part of the syringe, supporting and securing a proximal portion of a needle tube by the mold, injecting the resin into the mold, and forming the syringe and the needle tube integrally by forming the syringe around the needle tube.

Abstract: A syringe assembly includes: a barrel with a puncture needle; and a cap that is mounted on the barrel and in which a tip of the puncture needle 6 is located. The cap includes: a seal cap that is made of an elastic material and that is water vapor permeable for autoclave sterilization; and a cylindrical cover member made of a thermoplastic plastic material that is harder than the seal cap. The cylindrical cover member and the seal cap are configured such that a force of engagement between the cylindrical cover member and the seal cap is increased by autoclave sterilization.

Abstract: A protective device, for covering a needle tip of a needle of a medical instrument after puncturing of a puncture object by the needle, includes an inner cylinder, an outer cylinder, and a spring. The outer cylinder receives a cam structure of the inner cylinder and has a guide passage structure that includes one or more guide passages. The outer cylinder is provided with a lateral top part and a distal-end inclined edge part as resistance force generating parts for causing the inner cylinder to generate a resistance force at a puncture position or in the vicinity of the puncture position.

Abstract: A method for assembling an assembly for a syringe that includes a cylindrical outer barrel; a puncture needle; and a cylindrical cap. The method includes forming a closed space in a receiving hole of the cap by inserting the puncture needle and a barrel tip at least partially into the receiving hole before a tip end of the puncture needle is inserted into a bottom wall of the cap; discharging gas in the closed space; and sealing a tip end of the needle hole by further inserting the barrel tip into the receiving hole to insert the tip end of the puncture needle into the bottom wall.

Abstract: A grip configured to be attached to a barrel of a syringe having a flange, the grip including: a base portion including a finger rest portion configured to protrude outside of the flange, and a flange mounting portion configured to be mounted to the flange; and a cylindrical body portion that protrudes distally from the base portion and extends in a circumferential direction so as to be configured to fit to an outer circumferential surface of the barrel, wherein a mounting slit that traverses longitudinally through a wall portion of the base portion and a wall portion of the cylindrical body portion in an axial direction is formed over an entire length of the grip.

Abstract: An injector includes a hollow needle; a main body unit including a needle holding portion that holds the needle; and a protection device configured to cover the needle before and after puncturing a puncture target with the needle. The protection device includes: an inner member attached to the needle holding portion and being freely rotatable around an outer periphery of the needle holding portion; and m outer member configured to (i) cover an order side of the needle and the inner member before puncturing, (ii) expose the needle by moving toward a proximal end side relative to the main body unit at a time of puncturing, and (iii) cover a distal end of the needle by moving toward a distal end side relative to the main body unit after puncturing.

Abstract: A syringe and needle assembly including a needle tube having a needle tip for puncturing a living body. A syringe is formed integrally with the needle tube. The syringe includes a main body to be filled with a drug and a securing section that is formed integrally with the main body. The securing section has a close contact area that has an outer peripheral surface that contacts an inner surface of a cap when the cap is attached, and a connection area that connects the close contact area and the main body to each other. A needle tip of the needle tube protrudes from the close contact area, and a parting line is formed on the securing section. The outer peripheral surface of the close contact area has no parting lines.

Abstract: An injector includes a hollow needle; a main body unit including a needle holding portion that holds the needle; and a protection device configured to cover the needle before and after puncturing a puncture target with the needle. The protection device includes: an inner member attached to the needle holding portion and being freely rotatable around an outer periphery of the needle holding portion; and an outer member configured to (i) cover an outer side of the needle and the inner member before puncturing, (ii) expose the needle by moving toward a proximal end side relative to the main body unit at a time of puncturing, and (iii) cover a distal end of the needle by moving toward a distal end side relative to the main body unit after puncturing.

Abstract: A hook portion is formed to project from a columnar portion of a cover forming a needle cover body. The hook portion is hooked by a stopper wall of an outer cylinder, whereby the needle cover body is inhibited from slipping out of the outer cylinder. An inner cylinder biased toward a barrel by a spring member is accommodated inside the outer cylinder, that is, in a through hole. The needle cover body is provided continuously to the inner cylinder. In addition, the inner cylinder is held inside the outer cylinder as a cam projection is movably engaged with a guide passage formed in the outer cylinder.