JPH0663049U - Syringe that also serves as a chemical container - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a syringe with a simple structure that can securely connect a cartridge and an injection needle and can prevent the chemical solution inside the cartridge from being deteriorated and store the same. . A sealing member made of rubber is attached to a luer taper portion 8 at the tip of a glass cartridge 2 to close it, and a gasket 4 is attached to the rear end portion to close it, and a chemical solution A is filled inside. A lock cylinder 10 made of synthetic resin, in which a thread 11 is formed on the inner surface extending from the rear end of the luer taper portion 8 toward the outer periphery thereof, is provided in the luer taper portion 8 so as not to come off. After removing the sealing member, the needle base rim 12 of the injection needle 5
And the thread 11 of the lock tube 10 are screwed together to fix the injection needle 5 to the luer taper portion 8.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a syringe that also serves as a drug solution container and is filled with a drug solution for injection in advance.

[0002]

[Prior art]

 Conventionally, a syringe that is also used as a drug solution container is known.

In this type of injector, for example, as shown in FIG. 10, an injection needle 30 and a luer taper portion 31 to which the injection needle 30 can be attached are formed at the tip, and the luer taper portion 31 is sealed with a sealing member. 32, a cylindrical cartridge 34 whose inner surface on the rear end side is sealed with a gasket 33, and a plunger rod 35 connectable to the rear end of the gasket 33. The inside of the cartridge 34 is pre-filled with the injectable drug solution A, which can be used as it is as a syringe. Generally, in this type of syringe, the cartridge 34 is made of glass, and the sealing member 32 and the gasket 33 are made of rubber in order to prevent the chemical liquid A from being deteriorated and stored.

At the time of its use, the sealing member 32 is removed, the injection needle 30 is attached to the luer taper portion 31, the plunger rod 35 is connected to the gasket 33, and the plunger rod 35 is pushed to insert the needle into the inside of the cartridge 34. The drug solution A is poured out from the injection needle 30.

However, the needle base 36 of the injection needle 30 is attached to the luer taper portion 31 of the cartridge 34. However, according to this, the injection needle 30 and the luer taper portion 31 cannot be firmly coupled to each other. When the rod 35 is suddenly pushed in, there is a disadvantage that the injection needle 30 is separated from the luer taper portion 31.

Further, as shown in FIG. 11, as a syringe that also serves as a drug solution container that prevents the injection needle 30 from coming off the luer taper portion 31, a cylindrical cartridge 36 made of glass and a rubber cartridge at the tip of the cartridge 36 are provided. A connecting member 41 made of synthetic resin, which is fixed via a sealing member 37, has a luer taper portion 38 formed on the distal end side, and a lock tube 40 having a thread 39 formed on the inner surface extending to the outer periphery of the luer taper portion 38. It is known that the inner surface of the cartridge 36 on the rear end side is closed and the plunger rod 35 is constituted by a rubber gasket 42 which is freely connectable. The injection needle 43 attached to the luer taper portion 38 of the connecting member 41 has a hollow puncture needle portion 44 having a blade-like tip end for puncturing a human body, and the same shape as the puncture needle portion 44. A piercing needle portion 45 that pierces the sealing member 37 is continuously provided via a needle base 46. As a result, at the time of use, the needle base 46 of the injection needle 43 is attached to the luer taper portion 38 of the connecting member 41, and the needle base rim 47 is screwed onto the thread 39 of the lock cylinder 40 to firmly secure the injection needle 43. Can be combined.

However, in the cartridge 36 shown in FIG. 11, not only the connecting member 41 having a complicated structure must be provided, but also the injection needle 43 is provided with the piercing needle portion 45 for piercing the sealing member 37. Therefore, there is a disadvantage that the manufacturing cost and the like increase. Furthermore, when the piercing needle portion 45 of the injection needle 43 pierces the sealing member 37, the fragments of the sealing member 37 may be mixed in the drug solution A.

Therefore, in the cartridge 36 shown in FIG. 11, if the sealing member 32 as shown in FIG. 10 is attached to the luer taper portion 38 without providing the sealing member 37 on the rear end side of the connecting member 41, the injection can be performed. Although the piercing needle portion 45 of the needle 43 is not necessary and the fragments of the sealing member 37 are prevented from mixing with the chemical liquid A, the chemical liquid A filled in the cartridge 36 is made of synthetic resin. Since it comes into contact with the member 41, there is an inconvenience that the chemical liquid A is not suitable for storage while preventing alteration and the like.

[0009]

[Problems to be solved by the device]

 By eliminating such inconveniences, the present invention can also securely connect the cartridge and the injection needle, and can prevent the deterioration of the chemical liquid inside the cartridge and store it while also having a simple structure. The purpose is to provide a syringe.

[0010]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention is configured such that a removable rubber sealing member is attached to a luer taper portion formed at a tip end portion of the luer taper portion, and a luer taper portion at a rear end portion of the luer taper portion is freely connectable with a plunger rod. A syringe which also serves as a drug solution container, comprising a glass cartridge in which the gasket of (1) is inserted and closed to be filled with a drug solution, and an injection needle which is attached to the luer taper part by removing the sealing member of the cartridge. In this case, a synthetic resin lock tube having a thread formed on the inner surface extending from the rear end of the luer taper portion toward the outer periphery of the luer taper portion is provided in the luer taper portion so as not to come off, and the sealing member is provided. After the removal, the needle base rim of the injection needle and the screw thread of the lock cylinder are screwed to fix the injection needle to the luer taper portion.

In the present invention, a concave portion or a convex portion is provided on an outer periphery of a rear end portion of the luer taper portion, and a convex portion or a concave portion engaging with the concave portion or the convex portion is provided on a rear end portion of the lock cylinder. May be provided so as to prevent the lure taper portion from coming off.

[0012] Preferably, the concave portion or the convex portion of the luer taper portion is discontinuous, and the lock cylinder is provided so as not to rotate around the luer taper portion.

Further, in the present invention, a convex portion is provided on the outer periphery of the rear end portion of the luer taper portion, a convex portion is provided on the inner periphery of the rear end portion of the lock cylinder, and the convex portion of the lock cylinder is pulled out to the convex portion of the luer taper portion. Alternatively, the lock cylinder may be locked in the direction to prevent the lock cylinder from coming off the luer taper portion.

Furthermore, in the present invention, a rough surface portion may be formed on a contact surface of the luer taper portion that comes into contact with the lock cylinder, and the lock cylinder may be provided so as not to rotate around the luer taper portion.

[0015]

According to the present invention, a glass cartridge is filled with a chemical solution, the luer taper portion at the tip side of the cartridge is closed by a rubber sealing member, and the rear end side of the cartridge is made of a rubber gasket. The solution is blocked by and the chemical solution is stored in a state in which alteration is prevented.

When the syringe of the present invention is used, the sealing member attached to the luer taper portion is removed and the injection needle is attached to the luer taper portion. At this time, the needle base rim of the injection needle is screwed onto the thread of the lock tube provided in the luer taper portion. On the other hand, connect the plunger rod to the gasket inserted at the rear end of the cartridge. Then, by pressing the plunger rod, the gasket in the cartridge is slid to inject the liquid medicine from the injection needle. At this time, since the injection needle is securely fixed to the lock barrel at the luer taper portion, the drug solution in the cartridge can be rapidly poured out without the injection needle coming off the luer taper portion.

In the present invention, a concave portion or a convex portion may be provided on the outer periphery of the rear end portion of the luer taper portion, and a convex portion or a concave portion that engages with the concave portion or the convex portion may be provided on the rear end portion of the lock cylinder. . Thus, when the lock cylinder is attached to the luer taper portion, the convex portion or concave portion of the lock cylinder is engaged with the concave portion or convex portion of the luer taper portion to prevent the lock cylinder from being pulled out.

Further, by making the concave portion or the convex portion of the luer taper portion discontinuous and corresponding the convex portion or the concave portion of the lock cylinder to the concave portion or the convex portion, the lock cylinder can be prevented from rotating to the luer taper portion. preferable. This ensures that the lock tube mounted on the luer taper part is prevented from rattling.

Further, in the present invention, a protrusion may be provided on the outer periphery of the rear end of the luer taper portion, and a protrusion may be provided on the inner periphery of the rear end of the lock cylinder. As a result, the convex portions of the lock cylinder are locked to the convex portions of the luer taper portion to prevent the lock cylinder from coming off the luer taper portion.

Furthermore, in the present invention, a rough surface portion is formed on a contact surface of the luer taper portion that comes into contact with the lock cylinder, so that when the lock cylinder is attached to the luer taper portion, the friction resistance of the lock cylinder is increased. You may stop by.

[0021]

【Example】

 An embodiment of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 are explanatory sectional views showing a drug solution container / syringe of this embodiment, FIG. 3 is an explanatory sectional view showing an essential part of this embodiment, and FIGS. 4 to 9 are other embodiments. FIG. 3 is an explanatory sectional view showing a main part of

The syringe 1 that also serves as a drug solution container of this embodiment is used as a container for an injectable drug solution and also as a syringe. As shown in FIG. 1, the chemical solution container has a cylindrical glass cartridge 2 filled with the chemical solution A and sealed by a rubber stopper 3 and a rubber gasket 4. As shown in FIG. 2, the form of the syringe is such that the injection needle 5 and the plunger rod 6 are attached so that the medicinal solution can be freely dispensed.

First, each part of the drug solution container / syringe 1 will be described in detail.

As shown in FIG. 1, the cartridge 2 is formed integrally with a body portion 7 filled with a chemical solution, and is formed integrally with the tip of the body portion 7 and gradually reduces in diameter toward the tip and the inside of the body portion 7 is closed. The luer taper portion 8 having a communication hole formed therein and a finger hooking flange 9 formed integrally with the rear end peripheral edge of the body portion 7 are formed.

A substantially cylindrical lock cylinder 10 made of synthetic resin is provided on the outer periphery of the luer taper portion 8 at a predetermined interval.

The lock tube 10 has a thread 11 formed on the inner surface thereof. As shown in FIG. 2, when the injection needle 5 is attached to the luer taper portion 8 from which the rubber plug 3 is removed, the thread 11 is screwed into the needle base rim 12 of the injection needle 5 to be attached to the luer taper portion 8. The injection needle 5 is fixed by screwing. Further, as shown in FIG. 3, the lock cylinder 10 is provided with a convex portion 14 on the rear end inner circumference that engages with a concave portion 13 formed on the rear end outer circumference of the luer taper portion 8. No. 10 is prevented from falling off from the luer taper part 8.

As shown in FIGS. 1 and 2, the gasket 4 is slidably attached to the rear end side of the inside of the cartridge 2, and the rear end side thereof is attached to the rear end side as shown in FIG. , Plunger rod 6 is connectable.

When the chemical solution container / syringe 1 of the present embodiment having the above-mentioned configuration is used as a chemical solution container, as shown in FIG. 1, the inside of the cartridge 2 is filled with the chemical solution A and the luer taper portion 8 is provided. The rubber stopper 3 is fitted to the inside of the cartridge 2, and the gasket 4 is inserted inside the rear end portion of the cartridge 2 to seal the drug solution A. As a result, the chemical liquid A inside the cartridge 2 is brought into contact only with the inner surface of the cartridge 2 made of glass, the rubber stopper 3 and the gasket 4 made of rubber without contacting the lock cylinder made of synthetic resin. Since the drug solution A can be stored in the state of being kept, it is possible to reliably prevent the drug solution A from being deteriorated and to be stored.

When the drug solution container-syringe 1 of the present embodiment is used as a syringe, first, as shown in FIG. 2, the plunger rod 6 is connected to the gasket 4 and fitted to the luer taper portion 8. The rubber stopper 3 is removed, the needle base 15 of the injection needle 5 is inserted into the luer taper portion 8 from which the rubber stopper 3 is removed, and either the cartridge 2 or the injection needle 5 is rotated to perform injection. The needle base rim 12 of the needle 5 is screwed onto the lock cylinder 10. As a result, the injection needle 5 is securely fixed to the luer taper portion 8, and the injection needle 5 is reliably prevented from coming off the luer taper portion 8 even if the plunger rod 6 is pushed in suddenly when the drug solution is poured out. can do. Further, what is attached to the luer taper portion 8 is not limited to the injection needle 5, and for example, although not shown, it corresponds to the needle base rim 12 of the injection needle 5 at the end of the infusion tube or the like. By providing the member, it is possible to reliably prevent disconnection and connect to the luer taper portion 8 of the drug solution container / syringe 1.

By the way, in the above-described embodiment, as shown in FIG. 3, the convex portion 14 of the lock cylinder 10 is engaged with the concave portion 13 formed on the outer periphery of the rear end of the luer taper portion 8 to prevent the lure taper portion 8 from coming off. However, as shown in FIG. 4, a convex portion 16 is formed on the outer periphery of the rear end of the luer taper portion 8 and a concave portion 17 corresponding to the convex portion 16 is formed on the inner periphery of the rear end of the lock cylinder 10 so that they are mutually connected. It may be engaged to prevent it from coming off. Further, as another example, as shown in FIG. 5, a convex portion 18 is formed on the outer periphery of the rear end of the luer taper portion 8, and a convex portion 19 engaged with the convex portion 18 is formed on the inner periphery of the rear end of the lock cylinder 10. It is also possible to form and form a stopper to prevent the stopper from coming off. Further, as an example that is particularly easy to manufacture, as shown in FIG. 6, a recess 20 having a relatively shallow size and a wide width is formed on the outer periphery of the rear end of the luer taper portion 8, and the inner periphery of the rear end of the lock cylinder 10 is formed. A convex portion 21 that engages with the concave portion 20 and has a width smaller than that of the concave portion 20 is formed, and after the lock cylinder 10 is fitted from the tip of the luer taper portion 8, the lock is provided on the tip side of the concave portion 20 of the luer taper portion 8. A retaining ring 22 made of rubber or synthetic resin that prevents the protrusion 21 of the tube 10 from coming off may be fitted. As a result, the friction resistance when the lock cylinder 10 is attached to the luer taper portion 8 can be reduced, and the lock cylinder 10 can be reliably prevented from coming off by the lock ring 22.

Further, in the above-described embodiment, the rotation of the lock cylinder 10 is prevented by sufficient friction while the rear end of the lock cylinder 10 is engaged with the rear end of the luer taper portion 8. In order to prevent the rotation of the lock cylinder 10 and the rattling of the lock cylinder 10, the rough cylinder 23 is formed on the inner surface of the recess 13 of the luer taper portion 8 as shown in FIG. The friction with the convex portion 14 may be increased. At this time, it is well known that the surface of the luer taper portion 8 is roughened to prevent the injection needle 5 from falling off, but at the same time when such a rough surface of the luer taper portion 8 is formed. The rough surface portion 23 may be formed on the inner surface of the concave portion 13.

In order to prevent rotation of the lock cylinder 10 more reliably and prevent rattling of the lock cylinder 10, as shown in FIG. 8 or FIG. A discontinuous concave portion 24 or a discontinuous convex portion 25 is formed, and a plurality of convex portions 26 or plural concave portions 27 corresponding to the concave portion 24 or the convex portion 25 of the luer taper portion 8 are formed on the inner periphery of the rear end of the lock cylinder 10. May be formed. As a result, as shown in FIG. 8, the respective concave portions 24 of the luer taper portion 8 are engaged with the respective convex portions 26 of the lock cylinder 10 so that the lock cylinder 10 can be prevented from coming off and at the same time being prevented from rotating. As shown in FIG. 5, the respective convex portions 25 of the luer taper portion 8 are engaged with the respective concave portions 27 of the lock cylinder 10 so that the lock cylinder 10 can be prevented from slipping out and can be prevented from rotating at the same time.

[0034]

[Effect of device]

 As is clear from the above, the syringe for drug solution container of the present invention has a simple structure because the lock tube is provided at the luer taper portion on the distal end side of the cartridge so as not to come off. The needle base rim of the injection needle is screwed onto the thread formed on the lock cylinder and attached to the injection needle at the luer taper portion, whereby the detachment of the injection needle from the luer taper portion can be reliably prevented.

Further, by preventing the lock cylinder from coming off and at the same time preventing the lock cylinder from rotating, the lock cylinder can be reliably prevented from rattling.

Further, in the syringe for combined use with the liquid medicine container of the present invention, the liquid medicine is filled in the cartridge made of glass, and the luer taper portion at the front end side of the cartridge is closed by the rubber sealing member, and the rear end side of the cartridge is closed. Since it is used as a drug solution container by closing it with a rubber gasket, for example, the drug solution does not touch the lock tube made of synthetic resin. Can be saved.

[Brief description of drawings]

FIG. 1 is an explanatory cross-sectional view showing a state of a drug solution container of a drug solution container / syringe of the present embodiment.

FIG. 2 is an explanatory cross-sectional view showing a syringe state of the drug solution container / syringe of the present embodiment.

FIG. 3 is an explanatory sectional view showing a main part of the present embodiment.

FIG. 4 is an explanatory cross-sectional view showing a main part of another embodiment.

FIG. 5 is an explanatory cross-sectional view showing the main parts of another embodiment.

FIG. 6 is an explanatory cross-sectional view showing a main part of another embodiment.

FIG. 7 is an explanatory cross-sectional view showing the main parts of another embodiment.

FIG. 8 is an explanatory cross-sectional view showing the main parts of another embodiment.

FIG. 9 is an explanatory cross-sectional view showing the main parts of another embodiment.

FIG. 10 is an explanatory cross-sectional view showing a conventional drug solution container / syringe.

FIG. 11 is an explanatory cross-sectional view showing a conventional drug solution container / syringe.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Syringe also used as a liquid medicine container, 2 ... Cartridge, 3 ... Rubber stopper (sealing member), 4 ... Gasket, 5 ... Injection needle, 6 ... Plunger rod, 8 ... Luer taper part, 10 ... Lock tube, 11 ... Thread, 12 ... Needle base rim, 13 ... Recessed portion, 14 ...
Convex part, 23 ... Rough surface part.

Claims (5)

[Scope of utility model registration request] 1. A removable rubber sealing member is attached to a luer taper portion formed at a tip end of the luer taper portion to close the luer taper portion, and a rubber gasket connectable to a plunger rod is inserted at a rear end portion of the luer taper portion to close the luer taper portion. In a syringe that also serves as a drug solution container, comprising a glass cartridge filled with a drug solution therein, and an injection needle attached to the luer taper part by removing the sealing member of the cartridge, a rear end of the luer taper part A lock tube made of a synthetic resin having a thread formed on the inner surface extending from the portion toward the outer periphery of the luer taper portion so as to be retained in the luer taper portion, and after removing the sealing member, the needle base rim of the injection needle and A syringe that also serves as a drug solution container, characterized in that the injection needle is fixed to the luer taper portion by screwing with the thread of the lock tube. 2. A luer taper for the lock barrel by providing a recess or protrusion on the outer periphery of the rear end of the luer taper portion, and a protrusion or recess for engaging the recess or protrusion on the rear end of the lock barrel. The drug solution container / syringe according to claim 1, wherein the syringe is provided so as not to come off from the portion. 3. The drug solution container / syringe injector according to claim 2, wherein the recess or protrusion of the luer taper portion is discontinuous, and the lock cylinder is provided so as not to rotate around the luer taper portion. 4. A protrusion is provided on the outer periphery of the rear end of the luer taper, a protrusion is provided on the inner periphery of the rear end of the lock cylinder, and the protrusion of the lock cylinder is locked to the protrusion of the luer taper in the pull-out direction. 2. The syringe for drug solution container / combined use according to claim 1, wherein the lock tube is provided so as to be prevented from coming off from the luer taper portion. 5. The luer taper portion is provided with a rough surface portion formed on a contact surface of the luer taper portion that comes into contact with the lock cylinder so as to prevent the lock cylinder from rotating around the luer taper portion. The drug solution container-combined syringe described in.