KR20140141279A - Cap preventing separation for needle-hub of syringe - Google Patents

Abstract

The present invention relates to a separation preventing cap for needle-hub, and more specifically, to a separation preventing cap for needle-hub, which improves bearing capacity of needle-hub connecting a nozzle in which an injection syringe is equipped and a syringe, prevents needle-hub from being separated from the original position by injection pressure of the syringe or coupling pressure when coupling nozzles, and prevents a neck part of the syringe in which needle-hub is installed from being damaged by dispersing external force applied to needle-hub.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a needle hub detachment prevention cap,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a needle detachment prevention cap, and more particularly, to a needle detachment prevention cap which increases a supporting force of a needle hub connecting a needle with a syringe, To prevent the needle hub from being detached, and to disperse an external force acting on the needle hub to prevent the neck of the syringe equipped with the needle hub from being broken.

In general, a syringe includes a nozzle having a needle, a body having a cylindrical shape and a space for storing an injection liquid therein, and a piston slidably inserted in the body to change the volume of the space inside the body do. The main body has a structure in which a neck portion is formed at one end to reduce an outer diameter and a nozzle is coupled, and a piston is opened at the other end.

Such a syringe may be classified into a form in which an injection liquid stored in a separate container is used by inserting the injection liquid into a syringe before use and a form in which the injection liquid is stored and stored in a syringe. In the case of storing the injection liquid in the syringe, a glass syringe is used to prevent the injection liquid from being deteriorated by the material of the syringe during storage.

Since the glass syringe has a smooth surface, when the nozzle equipped with the needle is directly mounted and used, the nozzle is easily removed due to the injection pressure of the injection liquid, and the reliability and the processability with respect to the size precision of the syringe neck coupled with the nozzle are low .

Therefore, a needle hub for easily coupling the nozzle is mounted on the neck of the glass syringe. The needle hub is fixed by interference fit in a narrow section where the diameter of the rear end of the main body neck is somewhat smaller and a thread is formed on the inner circumferential surface in the forward direction in which the nozzle is mounted, It is possible to prevent the nozzle from being easily detached due to the injection pressure due to the material.

However, the needle hub has a side effect that the neck portion is broken by transmitting an external force acting on the needle hub to the tightened syringe neck portion. At the high pressure injection pressure, the needle hub is rotated and the screw connection with the nozzle is released, There is a problem that the hub is detached.

Korean Unexamined Patent Application Publication No. 2003-0020283 discloses a medical luer lock type sealing connection device and a syringe equipped therewith. Referring to Fig. 1, the prior art comprises: a) a nozzle 2 having an axially inner passage formed therein, for example a nozzle 2 comprising a distal bearing conical distal bearing surface and a proximal annular retaining region; b) a flange (3) forming an axially open sheet, the wall of said flange being formed with a central proximal opening having a distal portion with an internal thread and a diameter coinciding with the diameter of the proximal annular region of said nozzle (2) Wherein the flange (3) is fixed to the nozzle (2) by translation and / or rotation by engagement between the proximal annular holding area of the nozzle and the central proximal holding opening 3); c) a further complementary bearing connection surface mating with the bearing connection surface of said nozzle, and at least one proximal transverse outer wing forming a thread mating with an internal thread of said flange (3) Wherein the proximal annular retaining region of the nozzle (2) and / or the proximal annular retaining region of the nozzle (2) and / or the flange 3 is characterized in that it comprises a circular band or cord 4 coated or treated as a rubbing agent.

The conventional gun has a circular band or a cord 4 formed on the nozzle face contacting with the flange to connect the flange 3 (needle hub) to the nozzle 2 formed in the main body 1 and to increase the coupling force. This prevents the flange 3 from being detached together by the pressure separated when the cap 6 of the needle assembly 5 is coupled to the flange 3 and then the protective cover 7 of the needle assembly 5 is removed will be. That is, a circular band or a cord is provided to prevent detachment of the flange when the protective cover separation pressure is applied.

However, there is still a problem that external force acting on the conventional dryness flange (needle hub) is concentrated on the neck, which is the part connected to the main body, and the flange is broken in the injecting liquid injecting process, There is also a problem of being removed.

Therefore, it is necessary to study a new structure which can prevent detachment of the needle hub by injecting injection pressure without processing the glass syringe body.

Therefore, according to the present invention,

The needle hub is prevented from being detached by injecting liquid pressure by increasing the supporting force of the needle hub by being fixed to the syringe body while wrapping the outer surface of the needle hub and dispersing or interrupting the external force transmitted to the needle hub, And which can be used without machining a needle such as to prevent the needle hub from being detached from the needle hub.

Another object of the present invention is to provide a cap for detaching a needle hub which can prevent the detachment of the needle hub due to over-coupling by limiting the depth of penetration of the nozzle screwed into the needle hub.

According to another aspect of the present invention, there is provided a syringe needle hub detachment cap comprising:

A needle hub detachment prevention cap which is mounted on an injection tube portion protruding in the axial direction from the syringe body to fix a needle hub connecting the syringe and the nozzle to the syringe body to prevent the needle hub from being detached from the syringe injection tube portion by injection pressure of the injection liquid, A support tube portion surrounding the needle hub and having an inner surface in contact with an outer surface of the needle hub; And a cap support portion extending from a rear end of the support tube portion and coupled to the syringe body.

The cap fixing part may be formed as a cap fixing pipe in the form of a tube, and may be formed integrally with the supporting tube part by a connecting part that is gradually expanded from the outer surface of the main body of the syringe.

The support tube portion and the cap fixing tube may have one or more ring projections protruding from the inner surface of either or both of the portions so as to be tightly mounted on the needle hub or the syringe body and one or two or more flow holes may be formed in the connection portion, A plurality of extension grooves formed in a longitudinal direction of the shaft are formed on the inner surface of the cap fixing tube so that the extension grooves are extended when the syringe body is coupled to the syringe body, So that the coupling can be easily performed.

The cap fixing part may be formed as a coupling tube that is expanded from the support tube part, and may be attached to the front end of the syringe body.

In addition, the end portion of the support tube portion may have a stepped portion in the center direction so that the front end portion of the needle hub is hooked, thereby preventing the needle hub from being pushed and removed in the axial direction forward by the injecting liquid injection pressure.

One or more stoppers protrude in the axial direction at the end of the support tube portion to limit the screwing depth of the nozzle coupled to the needle hub.

The syringe needle hub release prevention cap of the present invention by the above-

It is possible to prevent the needle hub from being dislocated from its original position by the injection pressure at the time of injecting the injection liquid or the coupling pressure at the time of injecting the nozzle by holding the needle hub while being fixed to the syringe body, It is possible to minimize the load transmitted to the syringe neck, which is a weak structural part of the syringe, to prevent the damage.

In particular, the departure prevention cap can be used without using a separate syringe, so that it can be applied to existing syringes, and a stopper is formed to limit the degree of engagement of the nozzles, thereby preventing the needle hub from being detached from the neck of the syringe It has become possible to provide a useful product which can reduce costs and can be used stably for stock items.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional view of a main part showing a syringe with a conventional needle hub (flange).
FIGS. 2A and 2B are a perspective view and a vertical sectional view showing a departure prevention cap according to a first embodiment of the present invention; FIG.
FIGS. 3A and 3B are a perspective view and a vertical sectional view showing a departure prevention cap according to a second embodiment of the present invention; FIG.
4 is a cross-sectional view showing a departure prevention cap having a ring projection according to the present invention;
FIG. 5 is a sectional view showing a departure prevention cap having a flow hole according to the present invention. FIG.
FIG. 6 is a sectional view showing a departure prevention cap having an enlarged groove according to the present invention; FIG.
7 is a sectional view showing a departure prevention cap having a latching jaw according to the present invention;
8 is a perspective view showing a departure prevention cap having a stopper according to the present invention.
FIGS. 9A and 9B are diagrams showing a state of operation when the nozzle is engaged with a stopper formed or not. FIG.
10 is a perspective view showing another form of the stopper according to the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the appended drawings illustrate only the contents and scope of technology of the present invention, and the technical scope of the present invention is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the technical idea of the present invention based on these examples.

FIG. 2A is a perspective view showing a departure prevention cap according to an embodiment of the present invention, and FIG. 2B is a vertical sectional view.

2B, the syringe body 20 includes a syringe body 21 having a hollow portion filled with an injection liquid and an injection tube portion 22 protruding in the axial direction from a front end portion of the syringe body in the injection liquid injection direction do. Since the glass material is used for various purposes such as a form in which the injector is stored in a state in which the injection liquid is stored, and because it is difficult to finely process the glass material, the needle or the injection liquid supply line And injects the injection liquid in connection with the nozzle 40.

As shown in the drawing, the needle hub 30 connecting the injection tube 22 and the nozzle 40 of the syringe is formed with a tubular body having a front opening and an engaging plate 31 having a hole at the center formed at the rear end thereof, A screw thread 301 is formed on the nozzle 40 so as to be screwed with the nozzle 40. [ The coupling plate portion 31 of the needle hub 30 is mounted on the injection tube portion 22 in an interference fit manner. Since the injection tube portion 22 is formed in a conical shape, And the needle hub 30 is fixed in such a manner that the coupling plate portion 31 is placed on the neck portion 221. As a result,

In the above structure, the neck portion 221 of the injection tube portion has a lower structural strength than other portions, so that an external force is concentrated during external force operation, and breakage may occur. Also, the needle hub 30 coupled to the neck portion 221 may be detached from the neck portion 221 due to pulling in the process of engaging with the nozzle 40, so that the supporting force may be lowered. At this time, There is a problem that the needle hub 30 is detached.

Therefore, in order to prevent this, the separation preventing cap 10 is additionally provided to fix the needle hub 30 to the syringe body 21, thereby increasing the structural strength and preventing the nozzle hub 30 from being detached in the nozzle mounting process or injecting process.

2A to 3B, the separation preventing cap 10 includes a support tube portion 50 surrounding the needle hub 30 and a cap support portion 50 extending from the support tube portion and coupled to the syringe body 21 60).

The support tube portion 50 and the cap holder portion 60 are integrally formed and the inner diameter of the support tube portion 50 is formed to be the same as or similar to the outer diameter of the needle hub 30 so that the support tube portion tightens the needle hub And the cap holder 60 is fixed to the syringe body by fitting or attaching.

4, one or more ring projections 51 are formed on the inner surface of the support tube portion 50 to improve the gripping force of the support tube portion 50 with respect to the needle hub 30, A large gripping force acts on the portion where the outer surface is in contact, thereby increasing the coupling force between the needle hub 30 and the separation preventing cap 10. The protrusion length of the ring protrusion 51 may be 0.1 mm to 1 mm so that the coupling between the support tube 50 and the needle hub 30 is canceled. If the protrusion protrudes by 0.1 mm or less, the protrusion effect of the ring protrusion hardly appears. If the protrusion protrudes by 1 mm or more, the inner surface of the support tube other than the ring protrusion may be separated from the needle hub by the excessive protrusion. It is preferable that the inner surface of the support tube portion 50 of the release preventing cap made of the elastic material contacts the needle hub 30 as much as possible and the pressing force (gripping force) is further increased in the ring protrusion 51 portion than other portions.

As shown in FIGS. 2A and 2B, the cap portion 60 may be formed of a tubular cap fixing tube 70 that can be used for a manual syringe, or may be formed of a cap fixing tube 70 that can be used for an automatic syringe The coupling tube 80 may be formed of a metal.

First, as shown in FIGS. 2A and 2B, the cap fixing pipe 70 is a portion that is fitted to one end of the syringe body 21 . The diameter of the cap fixing tube 70 is formed to be larger than the diameter of the support tube portion 50 and the support tube portion and the cap fixing tube are connected to the connection portion 90, As shown in Fig. In other words, the departure prevention cap 10 of the present embodiment is formed by integrally forming the support tube portion 50 having a small diameter, the connecting portion 90 gradually expanded, and the cap fixing tube 70 having a large diameter.

4, one or more ring projections 71 may be formed on the inner surface of the cap fixing tube 70 to be tightly coupled with the outer surface of the syringe body, like the support tube 50. At this time, the ring protrusion 71 can be rolled even when a different pressing force is applied to each part by increasing or decreasing the protruding length from the inside of the cap fixing pipe toward the end side. Further, the ring protrusion 71 may be formed as a protrusion of a mesh- Can be improved.

Next, as shown in FIG. 3A and FIG. 3B, the coupling pipe 80 is expanded from the support pipe portion 50. FIG. . When the syringe having the release-preventing cap of the second embodiment is used for an automatic syringe, the diameter of the coupling tube 80 is made equal to or smaller than the diameter of the syringe body 21 so that the coupling tube is located only inside the syringe main body diameter, It is possible to prevent the occurrence of jamming in the sliding movement within the syringe.

The coupling tube 80 is integrally coupled to the syringe body by attaching one surface of the syringe body to the front end of the syringe body. In the attachment method, the coupling tube may be melted and attached or may be coupled through an adhesive.

Thus, the cap fixing pipe 70 and the coupling pipe 80 are fixedly coupled with the syringe body 21 so as to be integrated therewith, and the supporting tube portion 50 extended from the cap tube fixing pipe 70 and the needle tube 30 is tightly coupled with the needle hub 30. Accordingly, since the needle hub 30 is double-supported with respect to the axial load by the injection tube 22 and the separation preventing cap 10, the pulling force that can be generated in the nozzle mounting process and the injection force It is possible to prevent the needle hub 30 from being detached due to the pressure, as well as to prevent rotation of the needle hub, thereby preventing detachment by rotation or screw loosening with the nozzle.

5, one or two or more flow holes 91 may be formed in the connection portion 90 of the first embodiment. In the process of coupling the cap fixing tube 70 of the departure prevention cap to the syringe body 21, the internal space between the escape prevention cap and the syringe body is reduced. However, since the air in the inner space is not discharged to the outside due to tight coupling between the support tube portion 50 and the cap fixing tube 70, the pressure due to the pressurization is increased. This pressure increase acts as a resistance to the engagement of the escape cap and interferes with the engagement of the cap retainer and the syringe body. Accordingly, when the flow hole 91 is formed in the connection portion 90, the inner air that is pressurized in the process of coupling the cap fixing pipe to the syringe body is discharged to the outside through the flow hole, Position combination is possible.

Also, when the departure prevention cap 10 mounted on the syringe body is pulled out, the internal space between the departure prevention cap and the syringe body expands and the external air flows into the inside through the flow hole 91 So that the cap fixing pipe can be easily separated.

In this case, it is possible to provide a function as a flow hole by circulating air inside and outside of the separation preventing cap by forming a groove on the side surface of the needle hub. However, in the separation preventing cap of the present invention, the ring projection of the support tube portion, The ring projection of the support tube portion or the support tube portion can block the air flow by filling the side grooves of the needle hub by the pressing force. Accordingly, it is possible to further provide a flow-through hole in the departure-avoiding cap, so that stable air distribution can be achieved regardless of the supporting force.

Referring to FIG. 6, a plurality of extension grooves 72 may be formed on the inner surface of the cap fixing pipe 70 of the departure-preventing cap of the first embodiment. The extension groove 72 is formed in the axial direction on the inner surface of the cap fixing pipe 70. The expansion groove 72 may be opened or expanded when the external force acts to temporarily increase the diameter of the cap fixing pipe 70. [

That is, when the diameter of the cap fixing pipe 70 is formed to be the same diameter or slightly smaller than the diameter of the syringe body 21, the inner diameter of the cap fixing pipe must be enlarged and enlarged in the process of mounting the cap fixing pipe to the syringe body, . In this process, the expansion groove 72 formed in the cap fixing pipe is thinned by reducing the thickness of the cap fixing pipe, so that it is easily extended from the portion where the expansion groove is formed, so that the cap fixing pipe 70 can be easily mounted. When the fitting is completed, the resilient restoring force acts on the extended portion, so that the coupling between the cap fixing tube and the syringe body can be firmly performed. The extended groove 72 may be formed in various shapes such as a v-groove or a semicircular groove.

Referring to FIG. 7, a step 52 may be further formed in a center direction at the front end of the departure-avoiding cap support tube portion 50 of the first embodiment or the second embodiment. The stepped portion 52 protrudes from the inner surface of the front end portion of the support tube portion 50 in the center direction, and may be provided in the form of a ring on the front surface or partially formed with one or a plurality of protrusions.

The stepped portion 52 thus formed is engaged with the front side end portion of the needle hub 30 coupled to the injection tube portion so that the needle hub is pulled by the pulling force when the nozzle is fastened and is prevented from being separated from the original position, It is possible to prevent the needle hub from being axially detached by the injection pressure.

FIG. 8 is a perspective view showing the release preventing cap 10 provided with the stopper 53 according to the present invention. As shown in FIG. 8, the stopper 53 is supported by one or more So as to protrude. The stopper 53 limits the coupling depth of the nozzle 40 coupled to the needle hub 30 so as to prevent the nozzle from being pulled out of the neck when the coupling is coupled to an excessive depth.

The protruding end portion of the stopper abuts against a surface formed perpendicularly to the axial direction of the nozzle to define a degree of engagement of the nozzle. The protruding end surface of the stopper is formed horizontally, and both side surfaces thereof are formed into a trapezoid The structural strength due to the pressurization of the nozzle can be increased.

For example, as shown in FIG. 9A, the needle hub 30 is fixed to the syringe body 21 by attaching a separation preventing cap 10 having no stopper. The nozzle 40 threadedly coupled to the needle hub is provided with a needle 42 at the front end and an inlet hole 411 at the rear for introducing the injection tube 22, A tubular protective tube portion 43 having a diameter larger than that of the nozzle body while containing a rear portion of the nozzle body formed with a thread and a tubular protective tube portion 43 having a front end portion of the protection tube portion, And a protective pipe connecting portion 44 for connecting the protective pipe connecting portion 44 with the protective pipe connecting portion 44.

When the nozzle 40 as described above is screwed to the needle hub 30, the inner surface of the inflow hole 411 of the nozzle and the injection tube portion 22 of the syringe body are interfaced with each other and tightened. In order to increase the tightness, . At this time, if excessively more fastening is performed, the nozzle 40 is only rotated while being interposed in the injection tube portion 22, and the rotational force is transmitted to the threaded needle hub 30. Since the needle hub 30 is gripped by the departure-preventing cap 10 to restrict the rotation, the transmitted rotational force is converted into a linear motion and the axial direction is detached. Accordingly, the needle hub 30 may be disengaged from the neck portion 221 of the injection tube portion, and if the injection of injected fluid is performed in a state where the bearing force of the needle hub is lowered, the needle hub may be detached from the injector .

9B, when the stopper 53 is formed on the support tube portion 10 of the departure prevention cap 50, the rotation of the stopper 53 is restricted by the protective tube connection portion 44 of the nozzle 40 to which the end portion of the stopper is fastened. So that excessive engagement can be prevented.

In other words, if the stopper 53 is not formed, it is difficult to distinguish whether the nozzle 40 should be fastened, so that excessive fastening can be achieved, and the fastening force is directly transmitted to the needle hub 30 to pull the needle hub, However, when the stopper is formed, the fastening force of the nozzle 40 is firstly transmitted from the stopper 53 to the needle hub 30 by restricting the rotation, so that the fastening force is transmitted to the needle hub 30 .

Therefore, the protruding length of the stopper 53 protrudes beyond the outer surface of the injection tube 22 and the inner surface of the nozzle (inflow hole) or more so as to be transmitted to the stopper primarily before the fastening force is transmitted to the outer surface of the injection tube So that the detection is performed.

10, the upper surface of the stopper 53 may be formed with a plurality of locking protrusions 531 to limit the rotation of the stopper 53 by increasing the resistance when the nozzle face is in contact with the nozzle surface. In order to increase the rotation resistance, A locking groove or a locking protrusion corresponding to the locking protrusion of the stopper is formed on the surface of the protection pipe connection portion 44 which is to be contacted with the locking protrusion of the stopper, thereby preventing the additional rotation force from being transmitted. The locking protrusion may be formed as a one-directional rotation protrusion that is rotatable only in one direction so that the rotation is restricted when the nozzle is engaged, and the rotation is facilitated when the nozzle is separated.

As described above, the release cap according to the present invention is fixed to the main body of the syringe while gripping the needle hub, so that the needle hub is supported by two parts of the injection tube inside and the outside release cap. This can dissipate the external force acting on the needle hub, minimizing the load transmitted to the neck of the syringe, which is a structurally weak part, to prevent breakage.

Further, by holding the needle hub to increase the supporting force, it is possible to increase the supporting force of the needle hub without machining the outer surface of the needle, such as preventing the needle hub from being displaced from its original position by the high pressure generated when the nozzle is attached or injecting the injection liquid have.

Further, the nozzle of the present invention has been described above with reference to the form having the needles, but it includes various connectors such as an injection liquid injection line in addition to the illustrated form. For example, a line connector for injecting a molding agent is also included in the range of the nozzle. Accordingly, the departure-avoiding cap of the present invention provides an additional supporting force to the needle hub, so that the connection portion is loosened due to the rotation of the needle hub under high-pressure condition at the time of the auto-injection connection, Can be solved.

10: Leak-proof cap
20: Syringe
21: syringe body 22: injection tube
221: neck
30: Needle hub
31: joint plate 301: threaded
40: Nozzles
41: nozzle body 42: needle
43: protection tube 44: protective tube connection
411: Inflow hole 412: Threaded
441:
50: Support tube
51: ring projection 52:
53: Stopper 531:
60: Capgo government
70: cap fixing pipe
71: ring projection 72: extension groove
80: coupling pipe
90: Connection
91: Distributor ball

Claims (10)

The needle hub 30 which is mounted on the injection tube portion 22 of the syringe and connects the syringe 20 and the nozzle 40 is fixed to the syringe body to prevent the needle hub from being detached from the syringe injection tube portion by the injection pressure of the injection liquid The needle hub release preventing cap comprising:
A support tube portion 50 surrounding the needle hub 30 and having an inner surface in contact with an outer surface of the needle hub; And a cap holder part (60) extending from a rear end of the support tube part and coupled to the syringe body. The method according to claim 1,
The cap holder 60 is integrally formed by a connecting portion 90 which is formed of a tubular cap fixing tube 70 and is fitted to the outer surface of the main body of the syringe body and is gradually expanded from the supporting tube portion 50 Needle hub release cap. The method according to claim 1,
The cap hub assembly (60) is formed as a coupling tube (80) extending from the support tube part (50) and attached to the front end of the syringe body. The method according to claim 2 or 3,
Wherein one or more ring projections (51) protrude from the inner side surface of the support tube portion (50) so as to be in intimate contact with the outer surface of the needle hub. The method according to claim 2 or 3,
The end portion of the support tube portion 50 is further provided with a step 52 in the center direction so that the front end of the needle hub 30 is hooked so that the needle hub is prevented from being pushed and removed in the axial direction forward Hub escape prevention cap. The method according to claim 2 or 3,
Wherein one or more stoppers (53) protrude axially at the end of the support tube portion (50) to define a coupling depth of the nozzle (40) coupled to the needle hub (30) . The method according to claim 6,
The stopper (531) is formed on the upper surface of the stopper (53) so as to correspond to the nozzle surface to be interfaced with the stopper when the nozzle is fastened, thereby preventing rotation of the needle hub . 3. The method of claim 2,
Wherein one or more ring projections (71) protrude from the inner surface of the cap fixing pipe (70) and are tightly mounted on the syringe body. 3. The method of claim 2,
One or more flow holes (91) are formed in the connection portion (90) to allow air to flow through the flow-through hole when the separation-preventing cap (10) is attached and detached, Prevention cap. 3. The method of claim 2,
Wherein a plurality of enlarged grooves (72) formed in the axial length direction of the cap fixing pipe (70) are formed on the inner surface of the cap fixing pipe (70).

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