JP2010094440A - Syringe serving also as container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a syringe serving also as a container for which a hub Luer-Lok is integrated to one kind even when the capacity of a chemical is different, and a cost is reduced. <P>SOLUTION: In the syringe 30 serving also as the container, the distal end part of a cylinder 1 is turned to a small diameter part 3 where an outer diameter and an inner diameter are reduced one step, a front part stopper 5a is liquid-tightly fitted inside the small diameter part 3, a fitting hole 24 formed at the proximal end part 21 of the hub Luer-Lok 20 is attached to the cylinder 1 by externally fitting it to the small diameter part 3. On the front side of the fitting hole 24 in the hub Luer-Lok 20, a bypass chamber 25 is provided in which the front part stopper 5a can be moved and which is provided with a bypass groove 26 for introducing the chemical m inside the cylinder 1 to a Luer tip 22 when the front part stopper 5a is moved in. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a container-use syringe that can be filled and stored in advance with a chemical solution and taken out of the package and used immediately.

  Since the container / use syringe is pre-filled with a chemical solution, it can be used immediately after being taken out of the package without a complicated operation in a medical institution. Therefore, since it is excellent in convenience, it greatly contributes to the reduction of the work of persons engaged in medical work such as doctors and nurses, and is therefore adopted by many hospitals.

  Conventionally, as shown in FIG. 4, for example, as a container-use syringe 41, a cylinder 42 and a front stopper that is fitted on the front and rear end sides of the cylinder 42 and seals the drug solution filled in the cylinder 42 in a liquid-tight manner. 45a and rear stopper 45b, a hull luer lock 43 fitted to the front end of the cylinder 42 and provided with a bypass chamber 48 into which the front stopper 45a enters and a luer tip 49 for attaching an injection needle at the front end thereof, and the cylinder 42 A finger grip 44 fitted to the rear end and a plunger rod 46 inserted into the cylinder 42 from the rear end of the cylinder 42 and connected to the rear stopper 45b are known (for example, Patent Document 1).

  When using such a syringe serving as a container, the front stopper 45a is pushed forward together with the drug solution by pushing the rear stopper 45b with the plunger rod 46. When the front stopper 45a is pushed out of the cylinder 42 and enters the bypass chamber 48 of the hub luer lock 43, the front end side sealing in the chemical solution sealed between the front and rear stoppers 45a and 45b is released. As a result, the chemical solution flows out from the cylinder 42 into the bypass chamber 48, flows through the gap between the front stopper 45 a and the bypass chamber 48, and reaches the lure tip along the bypass groove 48 a provided on the inner wall of the bypass chamber 48. It is guided to the inner surface of 49 and introduced into the injection needle.

On the other hand, as shown in FIG. 5, for example, in the conventional cylinder 50 of a syringe, the distal end portion is a small diameter portion 51 whose diameter is reduced by one step, and the diameter is further reduced from the small diameter portion 51 toward the distal end side. There is known one in which the nozzle portion 52 is integrally formed (see, for example, Patent Document 2). When the cylinder 50 is used, a separately formed hubble luer lock 53 is press-fitted and fixed to the small diameter portion 51, and an injection needle (not shown) is attached to the luer lock 53.
JP 2007-111156 A JP 2004-329504 A

By the way, in the conventional container-use syringe 41, the hub luer lock 43 is attached by being fitted on the tip of the cylinder 42, and a front stopper 45a is fitted on the inside of the cylinder 42. Therefore, when the diameter of the cylinder 42 is increased with increasing amount of the chemical solution, the hub luer lock 43 and the front stopper 45a are also required to have the same diameter.
That is, in the conventional container / use syringe 41, as the cylinders 42 of various outer diameters are prepared, it is necessary to prepare the hub luer lock 43 and the front stopper 45a of various diameters so as to correspond thereto. Therefore, there is a problem that the cost increases.

  In this regard, if the syringe is a general syringe, a hubler that can be externally fitted to the small diameter portion 51 at the tip of the cylinder 50 is formed to have a constant outer diameter, as in the above-mentioned Patent Document 2. It is also considered that the lock 53 can be unified.

  However, since the container-use syringe 41 needs to be provided with the front stopper 45a and the bypass chamber 48 into which the front stopper 45a is transferred, a space for providing these can be secured by simply reducing the diameter of the tip of the cylinder 42. Therefore, there is a problem that the function as the container and syringe 41 cannot be achieved.

  The present invention has been made in view of such a problem, and even when the volume of the chemical solution is different, it can be unified with one type of hub luer lock or front stopper, thereby reducing the cost. An object of the present invention is to provide a container and syringe that can be used.

In order to solve the above problems, the present invention proposes the following means.
That is, a syringe for both containers according to the present invention includes a substantially cylindrical cylinder, a hub luer lock that is attached to the front end side of the cylinder and has a luer tip for introducing a chemical into the injection needle, and a rear end in the cylinder In the syringe serving as a container comprising a rear stopper fitted in a liquid-tight manner on the side, and a plunger rod inserted into the cylinder from the rear end side of the cylinder and connected to the stopper, the tip side portion of the cylinder is The outer diameter and the inner diameter are reduced to a small diameter part, and a front stopper is liquid-tightly inserted into the small diameter part, and the hub luer lock has an insertion hole formed at a base end thereof. It is attached to the cylinder by being externally fitted to a small diameter portion, and the front stopper can be transferred to the front side of the fitting hole in the hub lure lock, Wherein the bypass chamber the front stopper with a bypass channel for introducing the drug solution in the cylinder to the luer destination upon transfer is provided.

According to the container combined use syringe having such a feature, when the rear stopper is pushed forward through the plunger rod, the front stopper is pushed forward through the chemical solution, so that the front stopper is moved into the bypass chamber. The drug solution is introduced into the lure through the bypass groove. Therefore, when not in use, the chemical solution can be sealed with the front and rear stoppers in the cylinder, and when used, the chemical solution can be introduced into the luer tip by moving the front stopper into the bypass chamber as described above. Therefore, the function as a container combined syringe can be fulfilled.
In addition, even if the outer diameter of the cylinder is different when changing the capacity of the cylinder by adopting a configuration in which the hub luer lock is fitted on the small diameter portion formed at the tip portion of the cylinder, Since the diameter of the small diameter portion can be made constant regardless of the capacity, the diameters of the hub lure lock and the front stopper can be unified.
Further, as the diameter of the cylinder tip is reduced, the front stopper and the hub luer lock can be reduced in size, so that these material costs can be reduced.

Further, the container-use syringe according to the present invention is characterized in that a protruding portion capable of entering liquid-tightly into the small diameter portion is formed on a surface of the rear stopper facing the cylinder tip side.
Thereby, when the plunger rod is completely pushed in, the protruding portion of the rear stopper enters the small diameter portion, so that the chemical liquid can be prevented from remaining in the cylinder, particularly in the small diameter portion.

In the syringe for both containers according to the present invention, a flange portion is formed on the outer periphery of the distal end of the small-diameter portion so as to project outward in the radial direction of the cylinder. Is formed.
Thereby, it becomes possible to firmly attach the hub lure lock to the small diameter portion.

  Furthermore, in the syringe for both containers according to the present invention, a boundary portion between the small diameter portion of the cylinder and a cylinder main body that is a portion other than the small diameter portion is reduced in diameter from the tip of the cylinder main body into a spherical shape, and the small diameter It is characterized by being a spherical shoulder leading to the part.

  For example, when a syringe serving as a container is dropped, the tip of the cylinder is heavier, so it often falls from the tip side to the ground, and an impact is often applied to the boundary between the cylinder body and the small diameter portion. In this respect, in the container-use syringe of the present invention, since the boundary portion between the cylinder body and the small diameter portion is a spherical shoulder, the impact applied to the spherical shoulder is dispersed along the spherical shape. To do. Thereby, it becomes possible to improve the impact resistance of the container combined syringe.

  According to the container and syringe of the present invention, by providing a small-diameter portion to which a hub luer lock can be fitted on the tip side portion of the cylinder, even if the volume of the chemical liquid filled in the cylinder is different, The hub luer lock and the front stopper can be unified, and the cost can be reduced.

  Hereinafter, a container-use syringe according to an embodiment of the present invention will be described in detail with reference to the drawings. 1 is a side cross-sectional view of the container-use syringe according to the embodiment when not in use, FIG. 2 is a partially enlarged view of the vicinity of the tip of the container-use syringe in FIG. 1, and FIG. 3 shows the plunger rod in the container-use injector according to the embodiment. It is a sectional side view in the middle of pushing.

  As shown in FIG. 1, the container-use syringe 30 includes a cylinder 1, a hub luer lock 20 attached to the front end side (left side in FIG. 1, the same applies hereinafter), and the rear end side (right side in FIG. 1). ), A synthetic resin finger grip 4, and a front stopper 5a for sealing the chemical liquid m filled in the cylinder 1 from the front end side and a rear stopper for sealing from the rear end side. 5b and a plunger rod 6 that is inserted into the cylinder 1 from the rear end side, the front end portion is connected to the rear stopper 5b, and reciprocates the stopper 5 in the axial direction of the cylinder 1.

The cylinder 1 has a two-stage cylindrical shape made of transparent glass. The cylinder main body 2 has an inner diameter into which the rear stopper 5b is inserted and extends along the axis O. The outer diameter and the inner diameter of the cylinder body 2 are smaller than the cylinder body 2 so that the diameter of the cylinder body 2 is reduced. The small diameter portion 3 is fitted with the front stopper 5a. A flange portion 3 a that projects outward in the radial direction of the cylinder 1 is formed on the outer periphery of the tip of the small diameter portion 3.
Further, the inside of the cylinder body 2 is filled with the chemical liquid m, and the rear stopper 5b is fitted so as to enclose the chemical liquid m from the rear end side.

  The boundary portion between the cylinder body 2 and the small diameter portion 3 is a spherical shoulder 1 a that reaches the small diameter portion 3 by reducing the diameter of the tip of the cylinder body 2 to a spherical shape.

A ring-shaped protrusion (not shown) is provided on the outer periphery of the rear end of the cylinder body 2, and the protrusion is a ring-shaped groove (not shown) formed in a cylindrical hole (not shown) of the finger grip 4. The finger grip 4 is firmly attached to the cylinder 1 by being fitted to (omitted).
The finger grip 4 may be formed integrally with the cylinder body 2 in addition to the structure separately attached to the cylinder body 2.

The rear stopper 5b has a substantially cylindrical shape having an outer diameter slightly larger than the inner diameter of the cylinder body 2, and is formed of a medical rubber (for example, butyl rubber in the present embodiment) having corrosion resistance against the chemical solution m. The rear stopper 5b is fitted into the cylinder body 2 so as to be located slightly on the rear end side from the central portion in the axis O direction of the cylinder body 2.
A protrusion 5c that can enter the small diameter portion 3 in a liquid-tight manner is formed on the surface of the rear stopper 5b facing the tip of the cylinder 1.

On the other hand, the front stopper 5a has a substantially cylindrical shape having an outer diameter slightly larger than the inner diameter of the small diameter portion 3 of the cylinder 1, and, like the rear stopper 5b, has medical resistance with respect to the chemical solution m. It is formed from rubber (for example, butyl rubber in this embodiment).
The front stopper 5a is fitted so as to enclose the chemical solution m in the cylinder body 2 from the distal end side of the small diameter portion 3.

  As shown in detail in FIG. 2, the hub lure lock 20 has a two-stage outer cylindrical shape made of a transparent synthetic resin having appropriate rigidity, and has a base end portion 21 having a cylindrical shape, A luer tip 22 coupled to the distal end side of the base end portion 21 and having a smaller diameter than the base end portion 21, and a luer tip 22 coupled to the distal end side of the base end portion 21 with an interval radially outward of the luer tip 22. And a luer lock portion 23.

On the inner side of the base end portion 21, there is a fitting hole 24 that opens to the rear end side of the hub luer lock 20, and a bottomed hole-like shape that is located on the front side of the fitting hole 24 (that is, the luer tip 22 side). A bypass chamber 25 is formed.
The luer tip 22 has a tapered outer peripheral surface 22a whose diameter decreases as the outer peripheral surface moves toward the front end side. Inside the luer tip 22, the lure tip 22 extends from the front end side to the rear end side along the axis O. A communication hole 22 b is formed in the center of the bottom surface 25 a of the bypass chamber 25.
Further, the luer lock portion 23 is formed with a lock screw 23a for locking a needle base of an injection needle (not shown).

  The fitting hole 24 is formed to attach the hub luer lock 20 to the cylinder 1, and has an inner diameter that is substantially the same as the outer diameter of the small diameter portion 3 in the cylinder 1. Thereby, the hub luer lock 20 is attached to the front end side of the cylinder 1 by fitting the fitting hole 24 to the small diameter portion 3. An annular groove 24 a having an annular shape around the axis O is formed at the front end portion of the inner peripheral wall of the fitting hole 24, that is, at the boundary portion between the fitting hole 24 and the bypass chamber 25. When the hub luer lock 20 is attached to the tip end side of the cylinder 1, the flange portion 3 a of the small diameter portion 3 is fitted into the annular groove 24 a.

The bypass chamber 25 is a bottomed hole whose inner diameter is slightly larger than the outer diameter of the front stopper 5a, and the front stopper 5a fitted in the small diameter portion 3 can be transferred. Further, on the inner peripheral wall of the bypass chamber 25, a bypass groove 26 extending in parallel with the central axis of the cylinder 1 and provided with a total of four at intervals of 90 degrees in the circumferential direction is formed. Further, each of the bypass grooves 26 extends to the center of the bottom 25 a of the bypass chamber 25, whereby the bypass grooves 26 are in communication with a communication hole 22 b formed in the luer tip 22.
Therefore, in the state where the front stopper 5a is transferred and fitted into the bypass chamber 25, the chemical solution m filled and stored in the cylinder 1 flows through the bypass groove 26 and is introduced into the communication hole 22b. Will be.

  As shown in FIG. 3, when the syringe 30 having the above structure is used, when the plunger rod 6 is pushed into the cylinder 1, the rear stopper 5 b connected to the plunger rod 6 moves forward in the cylinder body 2. Move to. At this time, the pressing force due to the movement of the rear stopper 5b is transmitted to the front stopper 5a through the chemical solution m, and the front stopper 5a is transferred from the state where the front stopper 5a is fitted to the small diameter portion 3 into the bypass chamber 25. The sealing of the front end side of the cylinder 1 in the chemical solution m sealed between the front and rear portion stoppers 5a and 5b is released.

That is, in a state where the front stopper 5a is transferred into the bypass chamber 25, the chemical m flows out of the cylinder 1 into the bypass chamber 25 and flows through the gap between the front stopper 5a and the bypass chamber 25. By flowing through the bypass groove 26 provided on the inner wall surface, the guide is guided to the communication hole 22b of the luer tip 22 and introduced into the injection needle.
When the plunger rod 6 is completely pushed in, as shown by the broken line in FIG. 3, the protruding portion 5c of the rear stopper 5b enters the small diameter portion 3 from the rear end side of the cylinder 1 in a liquid-tight manner. All of the chemical liquid m is guided to the luer tip 22.

Such a container / use syringe 30 is configured to be attached by fitting the fitting hole 24 of the proximal end portion 21 of the hub luer lock 20 to the small diameter portion 3 formed at the distal end side portion of the cylinder 1. Therefore, for example, even when the outer diameter of the cylinder 1 is different when the capacity of the cylinder 1 is changed, the diameter of the small diameter portion 3 is made constant regardless of the capacity of the cylinder 1. I can keep it. Therefore, it is possible to unify the diameter of the hub luer lock 20 attached to the container / use syringe 30 into one kind, and to reduce the cost.
Similarly, it is possible to unify the front stopper 5a fitted in the small diameter portion 3 to a constant diameter.

  That is, according to the container / use syringe 30 of the present embodiment, the small diameter portion 3 to which the hubble luer lock 20 can be externally fitted is provided at the tip side portion of the cylinder 1 while exhibiting the original function as the container / use syringe 30. Thus, even when the volumes of the chemicals m filled in the cylinder 1 are different, it is possible to unify them into one type of hubble lock 20 and front stopper 5a.

  Further, since the protruding portion 5c is formed on the surface of the rear stopper 5b facing the tip of the cylinder 1, the protruding portion 5c enters the small-diameter portion when the plunger rod 6 is completely pushed. In particular, the chemical solution m can be prevented from remaining in the small diameter portion 3.

  Further, a flange portion 3 a that protrudes radially outward of the cylinder 1 is formed on the outer periphery of the tip of the small diameter portion 3, and an annular groove 24 a into which the flange portion 3 a can be fitted is formed in the fitting hole 24 of the hub luer lock 20. As a result, when the hub lure lock 20 is attached to the cylinder 1, the flange portion 3a is fitted into the annular groove 24a, so that the hub luer lock 20 can be firmly attached to the cylinder 1.

Furthermore, in the container-use syringe 30 of the present embodiment, the front stopper 5a and the hub luer lock 20 can be downsized by reducing the diameter of the tip of the cylinder 1, so that the cost of these materials can be reduced. It becomes possible.
That is, as the tip of the cylinder 1 has a smaller diameter than in the prior art, the front stopper 5a fitted into the inner diameter of the tip of the cylinder 1 can also be formed with a smaller diameter, and is further fitted over the tip of the cylinder 1. The diameter of the hub lure lock 20 can be reduced. Therefore, it is possible to reduce the amount of material corresponding to the reduced diameter, and it is possible to economically manufacture the container / use syringe 30 with less cost.

Since the cylinder 1 is provided with the spherical shoulder 1a, the strength of the cylinder 1 itself can be improved, and the cylinder 1 can be prevented from being damaged due to handling.
That is, for example, when the container / syringe 30 falls, the tip of the cylinder 1 is heavier, so it falls to the ground from the tip side, and an impact is often applied to the boundary between the cylinder body 2 and the small diameter portion 3. . In this regard, according to the container-use syringe 30 of the present embodiment, since the boundary between the cylinder 2 body and the small diameter portion 3 is the spherical shoulder 1a, the impact applied to the spherical shoulder 1a is as follows. Disperses along the spherical shape. Therefore, it is possible to prevent the cylinder 1 from being damaged due to the concentration of the impact at only one point, so that it is possible to provide the container / use syringe 1 with better handling.

  As described above, the container / injector 30 according to the embodiment of the present invention has been described. However, the present invention has been described in detail. Is also possible.

It is a sectional side view at the time of the unused of the container combined use syringe which concerns on embodiment. It is the elements on larger scale near the front-end | tip of the container combined use syringe in FIG. It is a sectional side view in the middle process of pushing in the plunger rod in the container combined use syringe which concerns on embodiment. It is a sectional side view of the conventional syringe for both containers. It is a sectional side view of the conventional cylinder.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cylinder 1a Spherical shoulder part 2 Cylinder main body 3 Small diameter part 3a Flange part 4 Finger grip 5a Front part stopper 5b Rear part stopper 5c Protrusion part 6 Plunger rod 20 Hubble luer lock 21 Base end part 22 Luer tip 22a Tapered outer peripheral surface 22b Communication hole 23 Luer lock part 23a Lock screw 24 Fitting hole 24a Annular groove 25 Bypass chamber 26 Bypass groove 30 Container / Syringe

Claims (4)

A cylinder having a substantially cylindrical shape, a hub luer lock attached to the front end side of the cylinder and having a luer tip for introducing a chemical into the injection needle, and a rear stopper fitted into the rear end side of the cylinder in a liquid-tight manner A syringe serving as a container comprising a plunger rod inserted into the cylinder from the rear end side of the cylinder and connected to the rear stopper,
The front end side portion of the cylinder is a small diameter portion whose outer diameter and inner diameter are reduced by one step, and a front stopper is liquid-tightly fitted in the small diameter portion,
The hub lure lock is attached to the cylinder by fitting a fitting hole formed in a base end portion thereof to the small diameter portion,
The front stopper can be transferred to the front side of the fitting hole in the hub lure lock, and when the front stopper is transferred, a bypass groove is provided for introducing the chemical in the cylinder to the luer tip. A container-use syringe provided with a bypass chamber.   The container-use syringe according to claim 1, wherein a protrusion that can enter the small diameter portion in a liquid-tight manner is formed on a surface of the rear stopper facing the cylinder tip side. A flange portion is formed on the outer periphery of the tip of the small diameter portion so as to project outward in the radial direction of the cylinder.
The container-use syringe according to claim 2, wherein an annular groove into which the flange portion can be fitted is formed in the fitting hole.   A boundary portion between the small diameter portion of the cylinder and the cylinder main body, which is a portion other than the small diameter portion, is a spherical shoulder from the tip of the cylinder main body to a spherical diameter and reaching the small diameter portion. The container-use syringe according to any one of claims 1 to 3, wherein the syringe is used as a container.

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