JP4599875B2 - Syringe with connector, connector used for syringe, and syringe - Google Patents

Description

  The present invention relates to a syringe with a connection tool, a connection tool used for the syringe, and a syringe.

In a medical field, a syringe that is a so-called syringe barrel is used by various usage methods. Generally, a stapler type connector such as a needle base equipped with a needle tube is attached to a luer portion at the tip of a syringe, and is used for collecting blood from a patient or administering a drug stored in a syringe to a patient.
A prefilled syringe may be used for the syringe in a medical field. In this prefilled syringe, a drug is injected into the syringe body in advance. In this case, the tip of the nozzle of the syringe body is sealed with, for example, resin, but when used, this portion is opened and the plunger is pushed in to discharge the medicine. According to such a prefilled syringe, it is possible to reduce the labor and time required for drug administration and drug mixing to a patient and prompt prompt processing.

  A syringe may also be used in a system called a pipeline system such as an infusion line system or a blood collection line system. In this system, a syringe is connected to an external port of the line system, and a medicine in the syringe is administered from there, or conversely, collection is performed from the line. As a method for connecting such a syringe and a line system, a direct connection method in which a luer part is directly inserted into the port of the line system, and a luer part and the port are screwed and connected using a connection tool (lock nut). A fixed connection method is used.

By the way, in many cases, a lock nut is set on the luer part from the beginning of the syringe that can be fixedly connected to the port of the line system. In order to securely connect the syringe and the line system, a stepped portion having a different diameter is provided in the luer part, and a lock nut is inserted in the luer part in advance so that the stepped part is held in place. The connection operation can be performed.
Japanese Patent Laid-Open No. 7-8271

However, as shown in FIG. 10, such a syringe with a connector has a problem in that the lock nut becomes an obstacle to the direct connection type port, and the luer part cannot be connected to the port.
As another problem, as shown in FIG. 11, when trying to attach a needle base to the luer part with respect to the above-mentioned syringe with a connecting tool, the lock nut interferes with the user, The correct positional relationship cannot be grasped, and the lure part and the needle base cannot be connected well. Moreover, since the lock nut is set in the luer part, the length of the lure part exposed to the outside is insufficient, and there is a problem that the needle base cannot be sufficiently held in the luer part. .

Thus, the problem in the versatility of the syringe with a lock nut is desired to be improved immediately in response to a request from a medical site that requires a quick and accurate response.
The present invention has been made in view of the above problems, and its purpose is that it can be fixedly connected to a port and has high operability even in the case of direct connection without using a connector. It is providing the syringe which can be exhibited, the connection tool used for this syringe, and the syringe which can mount | wear with the said connection tool.

  In order to solve the above-mentioned problem, the present invention provides a syringe with a connector, in which a connector for connecting a syringe to a port is arranged in a luer part of the syringe body, A first engagement portion that engages with the connector side of the main body is formed, and a second engagement portion that engages with the first engagement portion is formed on the connector, and the connector or syringe body On the other hand, the first engagement portion and the second engagement portion are disengaged by applying an external force in a direction different from the syringe axial direction by a predetermined operation.

Here, the first engaging portion can be a portion (step region formed with a convex portion and a concave portion) in which the distal end side provided with the luer portion is widened on the outer peripheral surface of the syringe body.
Specifically, the connector main body is a cylindrical body, and the second engaging portion is formed on an extension portion that extends from the connector main body, and the connector main body is a luer of a syringe. And the extension portion is elastically contacted with the outer peripheral surface of the syringe body so that the first engagement portion and the second engagement portion are engaged with each other, and the connection tool or the syringe body is By performing a predetermined operation, the second engagement portion of the extension portion can be separated from the outer peripheral surface of the syringe, and the engagement can be released.

In such a configuration of the present invention, first, the connecting tool is inserted into the luer part, and the second engaging part of the connecting tool is engaged with the first engaging part of the syringe body, so that the syringe is The connector can be engaged and attached. In this way, the user can engage the connection tool on the syringe side and use the connection tool to connect the syringe to a fixed connection port such as an infusion line system.
And secondly, in the present invention, an external force (for example, an external force in the syringe radial direction) is applied to the connector in a direction different from the syringe axial direction by a predetermined operation, for example, the second engagement of the connector provided in the extension portion. If the joint part is separated from the first engaging part on the syringe side, the first and second engaging parts of the connecting tool are disengaged, so that the connecting tool can be easily removed from the luer part. it can.

Once the connection tool is removed from the luer part in this way, the connection tool does not get in the way when the lure part is directly connected to the connection type port. A direct connection port can be reliably connected, and high versatility can be exhibited.
In addition, with the prefilled syringe of the conventional configuration, it is difficult for the user to check the position of the luer part and the needle base due to the connection tool being interrupted, and the needle base is firmly attached to the back of the luer part because of the connection tool. However, in the present invention, since the connector can be easily separated from the syringe as described above, such a conventional problem can be fundamentally solved.

1. Embodiment 1
1-1. Overall Configuration of Prefilled Syringe FIG. 1 is a cross-sectional view showing a configuration of a prefilled syringe and a connection tool (lock nut) according to Embodiment 1 of the present invention. In addition, although it was set as the structure which combined a prefilled syringe and a lock nut here, you may apply this invention to syringes other than a prefilled syringe. Here, for the sake of explanation, the plunger 40 is not a cross-sectional shape, but shows a normal side structure.

The configuration of the prefilled syringe 1 shown in the figure is roughly composed of a syringe body 10, a needle base 20, a plunger (also referred to as a pusher or a piston) 40, and the like.
The syringe body 10 is a cylindrical body formed by injection molding a material having excellent chemical resistance such as polyethylene, polypropylene, polycarbonate, and polyvinyl chloride. The front end portion is sealed with a top surface portion 110, and a luer portion 120 formed by drawing into a tapered shape is projected at the center of the top surface portion 110. The luer part 120 is tapered according to ISO 6/100, and a general needle base 20 can be easily attached. In FIG. 1, a cap 20 is attached to the tip of the luer part 120. Here, as a feature of the prefilled syringe 1 of the present invention, convex portions 101 and 102 and a concave portion 103 are provided side by side so as to surround the outer peripheral surface of the syringe body 10 near the luer portion 120. This is for engaging with a lock nut 30 described later.

On the other hand, an opening 12 is formed on the rear end side of the syringe body 10.
Hereinafter, a direction along the longitudinal direction of the syringe body 10 is referred to as an “axial direction”, and a direction perpendicular to the axial direction is referred to as a “radial direction”.
The plunger 40 is made of a resin material having excellent chemical resistance like the syringe body 10, and has a disk-shaped end portion having a main surface in the radial direction at both ends of the plunger body 42 having a cross-sectional shape for reinforcement purposes. With structure. One of the end portions is a pressing end portion 41 for a user to press with a finger, and the other end portion is a head portion 43 that is inserted into the syringe body 10 in the axial direction.

A packing 44 is disposed at the tip of the head portion 43, and the packing 44 comes into close contact with the inner wall of the syringe body 10. Here, the medicine 100 is stored in the syringe body 10 that is internally sealed by the packing 44 and the cap 20.
In the prefilled syringe having such a configuration, the user removes the cap 20 at the time of use so that the medicine 100 can be discharged. Then, when the user pushes the pressing end portion of the plunger 40 toward the syringe side with a finger, the medicine 100 is discharged from the tip of the luer portion 120 according to the pushing amount.

1-2. Configuration of Lock Nuts As shown in FIG. 1, the prefilled syringe 1 of the first embodiment is equipped with a lock nut 30 as a feature that can be easily attached to and detached from the luer part 120. ing. The lock nut 30 is used as a connection tool for connecting the prefilled syringe 10 to a fixed connection type port in an infusion line system or a blood collection line system in a medical field.

The lock nut 30 is a bottomed cylinder formed by injection-molding a resin material having excellent mechanical strength, and a female screw 3010 of a standard conforming to ISO 594-2 is provided on the inner surface of the side part 301 corresponding to the cylinder part. It is threaded. The female screw 3010 is screwed with a male screw 5010 described later.
Inside the lock nut 30 is formed a rib 3020 having a perforated portion that is large enough to allow the luer portion 120 to be inserted almost without gaps, and forms a partition structure that divides the space inside the lock nut from the syringe side. Yes. On the other hand, on the outside of the lock nut 30, two plate-like arms 31 and 32 are formed extending from the T-shaped fulcrum in parallel to the axial direction toward the syringe body 10. Claw-shaped protrusions 310 and 320 having a triangular cross-sectional shape are formed inside the ends of the arms 31 and 32. The shape of the protrusions 310 and 320 is set to a shape complementary to the concave portion 103 of the syringe body 10.

1-3. Desorption of syringe and lock nut FIG. 2 is a diagram showing an engagement method of the lock nut.
According to the lock nut 30 having the above-described configuration, as shown in FIG. 2, when the user uses the lock nut 30, the user first inserts the lock nut 30 into the luer part 120 (at this time, the lure is centered on the rib 3020 inside the lock nut). Part 120 is inserted). At this time, the user confirms that the rib 3020 is firmly inserted to the root of the luer part 120.

  Then, as a second step, the user uses the arms 31 and 32 extended from the lock nut 30 and makes the protrusions 310 and 320 arranged on the inner side of the arms 31 and 32 elastically contact the concave portion 103 of the syringe body 10 to complement each other. And engage. Since the shapes of the protrusions 310 and 320 are formed in accordance with the convex portions 101 and 102 and the concave portion 103, the lock nut 30 is reliably held on the syringe body 10 side by the above engagement.

  Here, FIG. 3 is a cross-sectional view showing a state in which the prefilled syringe 1 is connected to the fixed connection type port 50 side of the infusion line system using the lock nut 30. FIG. The female screw 3010 of the lock nut 30 is screwed with the male screw 5010 on the port 50 side, so that the tip of the luer part 120 of the prefilled syringe 1 enters the infusion line while pressing the packing 52 provided inside the port 50 closely. Inserted. At this time, the syringe body 10 is firmly fixed to the lock nut 30 by the convex portions 101, 102, the concave portion 103 and the protrusions 310, 320, and the lure portion 120 is supported in posture by the rib 3020 inside the lock nut. The prefilled syringe 1 does not come off during use. Therefore, the user can safely push the plunger 40 as appropriate and administer the required amount of drug 100.

  On the other hand, even after the lock nut 30 of the first embodiment is once engaged with the syringe body 10, it can be easily removed from the syringe side by performing a predetermined operation as follows. Since this operation can be performed reversibly and easily (for example, with one hand), this engages the prefilled syringe 1 only when the locknut 30 is necessary, and removes the locknut 30 when unnecessary and removes the prefilled syringe 1 Can be used.

  As a specific method for removing the lock nut 30 (the predetermined operation described above), as shown in the syringe and lock nut sectional view of FIG. 4, the user presses the syringe tip side of the arms 31 and 32, and the arm 31 , The center of 32 is the force point, and the contact portion between the projections 310, 320 and the convex portion 101 is used as a fulcrum to interact by the “lever principle”, and the tips of the arms 31, 32 provided with the projections 310, 320 are the syringe body 10 It operates so that it may warp from the side (that is, external force is applied to the lock nut 30 in a direction different from the syringe axial direction). By doing so, the protrusions 310 and 320 are separated from at least the convex portions 102 and the concave portion 103 and become free, and the lock nut 30 can be pulled out from the syringe side with a light force in this state. Even if the center of the arms 31 and 32 is not pressed, the lock nut 30 can be attached to the syringe body by performing an operation of spreading the tips of the arms 31 and 32 provided with the protrusions 310 and 320 outward with a finger or the like. It can be easily detached from the 10 side.

If the arms 31 and 32 are arranged while providing a T-shaped fulcrum with respect to the lock nut 30, it is possible to press the rear ends of the arms 31 and 32 to widen the tips of the arms 31 and 32, This is desirable because the lock nut 30 can be detached from the syringe body 10.
FIG. 5 is a cross-sectional view showing a state in which the lock nut 30 is removed from the prefilled syringe 1 by the above method and the prefilled syringe 1 is connected to the direct connection type port 500 side of the infusion line system. As described above, in the first embodiment, since the lock nut 30 is removed, the luer part 120 of the prefilled syringe 1 is not obstructed by the lock nut 30, and the packing 52 inside the port 500 is correctly and tightly sealed. Holds and a good connection between the prefilled syringe 1 and the port 500 is realized.

  6 is a cross-sectional view showing a state where the lock nut 30 is removed from the prefilled syringe 1 and the needle base 70 is attached to the luer part 120. The needle base 70 has a configuration in which a socket part 71 made of a resin member formed in accordance with the shape of the luer part 120 holds a needle tube 72 as a so-called injection needle. As shown in FIG. 11, with a pre-filled syringe having a conventional configuration that cannot be removed while the lock nut is set, it is difficult for the user to check the positions of the luer part and the needle base because the lock nut interferes with the error. There was a risk that the user could touch the infecting bacteria by puncture. In addition, there is a problem that it is difficult to firmly attach the needle base to the back of the luer part due to the lock nut, but in the first embodiment, the user can easily lock the needle base by operating the arms 31 and 32 lightly. Since the nut 30 can be removed from the prefilled syringe 1, such a conventional problem can be fundamentally solved.

<About other embodiments>
The arms 31 and 32 of the lock nut 30 of the first embodiment are each formed with one projection 310 and 320 each having a triangular cross-sectional shape at the tip thereof, and the convex portions 101 and 102 and the concave portion of the syringe body 10 with respect thereto Although 103 is configured to be fitted, the present invention can be applied to other embodiments described below.
2. Embodiment 2
In the second embodiment shown in FIG. 7, the configuration of the lock nut 30 is substantially the same as that of the first embodiment, but the configuration of the syringe body 10 is slightly different. The second embodiment is characterized in that a male screw portion 104 formed of a spiral convex portion is formed along the outer peripheral surface of the syringe body 10.

  In the present invention, even when the syringe main body 10 having such a male screw portion 104 is used, the same effects as those of the first embodiment can be obtained. In addition, the positional relationship between the syringe body 10 and the lock nut 30 can be slightly adjusted by adjusting the degree of screwing (tightening) of the lock nut 30 to the male threaded portion 104. Good connection can also be made to the fixed connection type port corresponding to the luer part 120 having a shorter length.

3. Embodiment 3
In the third embodiment shown in FIG. 8, the configuration of the lock nut 30 is substantially the same as that of the first embodiment, but the configuration of the syringe body 10 is slightly different. The third embodiment is characterized in that a recess 105 is formed by being recessed from the outer peripheral surface of the syringe body 10.
In the third embodiment, even when the syringe body 10 having such a male screw portion 104 is used, the same effects as those in the first embodiment can be obtained. In the third embodiment, since the syringe body 10 is formed on a smooth surface without the protrusions 101 and 102, there is a problem that, for example, the protrusions 101 and 102 of the syringe body 10 are caught on clothes during a user operation. Occurrence can be avoided. In the third embodiment, naturally, it is necessary to consider the material thickness of the syringe body 10 that can form the recess 105.

4. Embodiment 4
In the fourth embodiment shown in FIG. 9, the configuration of the syringe body 10 is substantially the same as that of the first embodiment, but the configuration of the lock nut 35 is slightly different. The third embodiment is characterized in that a plurality of protrusions 3510 and 3520 are formed at regular intervals on the inner sides of the ends of the arms 36 and 37 of the lock nut 35.

In the third embodiment, even when the syringe body 10 having such a male screw portion 104 is used, the same effects as those in the first embodiment can be obtained. In particular, in the fourth embodiment, since the plurality of convex portions 3510 and 3520 are fitted to the syringe body 10 side, both can be fixed more reliably.
5. Other matters The prefilled syringe 1 of the present invention has been described with respect to the example in which the lock base 30 is removed and the needle base 60 is attached. However, the invention is not limited to this, and the pipe base lure is not limited to this. Or a tube may be used. In the prefilled syringe 1 equipped with a needle base, it is effective to attach a cap or the like so as to cover and protect the needle base and the needle tube from above in order to prevent erroneous puncture. As this cap, the same cap as that used for the vial can be used.

In each of the above embodiments, a configuration example of a lock nut in which a female screw is threaded is disclosed, but the present invention is not limited to this configuration, and other structures such as an intermittent thread cutting structure and a cup joint structure are disclosed. You may make it connect with the port side of a line system.
Further, in each of the above embodiments, the configuration example in which two arms of the lock nut are provided is shown, but the number of arms of the present invention may be other than this. Further, instead of providing the arm, the circumferential side surface of the lock nut may be extended in the axial direction to form a cylindrical extension, and a protrusion may be provided inside the extension. In this case, considering the elastic deformation on the lock nut side, the lock nut and the syringe are preferably engaged with each other by screwing rather than fitting.

Moreover, the luer part of the syringe used in the present invention is not limited to one having a circular cross-sectional shape, and may be, for example, a rectangular cross-sectional shape, an elliptical cross-sectional shape, or a triangular cross-sectional shape. However, in that case, it is necessary to select a port and a needle base that match the shape of the lure part.
Moreover, in this invention, it is good also as a structure which extends and provides the some arm from the outer periphery of the top | upper surface part of a luer part base, and the said convex part provided in the lock nut outer periphery. In this case, each arm is separated from the lock nut by applying an external force different from the axial direction to the syringe body.

  The syringe with a connector of the present invention, the connector used for the syringe, and the syringe can be used for the purpose of administering a drug solution to a patient or collecting blood at a medical site.

3 is a cross-sectional view showing a configuration of a prefilled syringe according to Embodiment 1. FIG. It is a figure which shows the engagement method of a lock nut. It is sectional drawing showing the state which connected the prefilled syringe with the fixed connection type | mold port side of the infusion line system. It is sectional drawing of a prefilled syringe and a lock nut. It is sectional drawing showing the state which connected the prefilled syringe with the direct connection type port side of the infusion line system. It is sectional drawing which shows the state which attached the needle base to the luer part of the prefilled syringe. FIG. 6 is a diagram showing a configuration of a lock nut and a prefilled syringe in a second embodiment. FIG. 5 is a diagram showing a configuration of a lock nut and a prefilled syringe in a third embodiment. FIG. 6 is a diagram showing a configuration of a lock nut and a prefilled syringe in a fourth embodiment. It is a figure which shows the structure of the conventional lock nut and a prefilled syringe. It is a figure which shows the structure of the conventional lock nut and a prefilled syringe.

Explanation of symbols

1 Prefilled syringe
10 Syringe body
12 (Rear end side) Opening
20 cap
30, 35 Lock nut
31, 32, 36, 37 arms
40 Plunger
41 Pressing end
42 Plunger body
43 Head
44 Packing
50, 500 ports
52 Packing
100 drugs
101, 102 Convex
103, 105 recess
104 Convex (male thread)
110 Top surface
120 lure
310, 320, 3510, 3520 protrusion
3010 Female thread
3020 ribs

Claims (5)

The connector for connecting the syringe to the port is a syringe with a connector arranged on the luer part of the syringe body,
The syringe body has a cylindrical outer peripheral surface and a top surface portion on which the luer portion is arranged,
It said outer peripheral surface, the first engagement portion that engages with the connection tool side is formed,
The connection tool is formed with a second engagement portion that engages with the first engagement portion,
After the first engaging portion and the second engagement portion is engaged, by applying an external force in a direction different from the syringe axial direction connector or syringe body, the first engagement portion and the second A syringe with a connection tool, characterized in that the engagement of the two engaging portions is released. The connector body is a cylinder,
The second engagement portion is formed on an extension portion arranged extending from the connector main body,
The connection tool body is inserted into the luer part of the syringe, and the extension part is elastically contacted with the outer peripheral surface of the syringe body, whereby the first engagement part and the second engagement part are engaged with each other, Alternatively, when the operation is performed on the syringe body, the second engagement portion of the extension portion is separated from the outer peripheral surface of the syringe, and the engagement is released. The syringe with the connection tool described. To syringe comprising a cylindrical outer peripheral surface of the first engagement portion is disposed, a syringe body having a top surface portion of the luer part is provided, extrapolated to the luer part, to connect the syringe to the port A connection tool,
A second engagement portion that engages with the first engagement portion is disposed;
After the first engaging portion and the second engagement portion is engaged, by applying an external force in a direction different from the syringe axial direction connector or syringe body, the first engagement portion and the second A connection tool characterized in that the engagement of the two engaging portions is released. The connector body is a cylinder,
The second engagement portion is formed on an extension portion arranged extending from the connector main body,
The connector main body is inserted into the luer portion of the syringe, and the extension portion is in elastic contact with the outer peripheral surface of the syringe body, whereby the first engagement portion and the second engagement portion engage with each other, and the extension The connector according to claim 3, wherein the engagement is released by separating the second engaging portion of the portion from the outer peripheral surface of the syringe. A syringe provided with a syringe main body having a cylindrical outer peripheral surface in which a first engagement portion is disposed and a top surface portion in which the luer portion is disposed ,
The first engaging portion is configured to engage with a second engaging portion in the connector according to claim 3 or 4,
After the first engaging portion and the second engagement portion is engaged, by applying an external force in a direction different from the syringe axial direction connector or syringe body, the first engagement portion and the second The syringe is characterized in that the engagement of the two engaging portions is released.

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