KR100601315B1 - a safety injector structure - Google Patents

Abstract

The present invention relates to a disposable safety syringe, in particular to prevent the needle tip to bend when separating the needle cap to be covered to protect the needle, and the process of covering the needle cap to discard the used syringe is unnecessary, It is to prevent the infection caused by contact with the wound. The present invention relates to an outer cylinder having a tapered discharge port, and a needle cap separated from the outer cylinder during cutting of the first joint by the forward movement of the push rod integrally connected to the outer cylinder by the first joint and built into the outer cylinder, and the advance of the push rod. An elastic body that expands the inlet of the discharge port by movement to easily detach the needle hub from the groove of the discharge port, prevents the needle jaw from separating from the hook of the push rod, and allows the needle tip to contact the inner wall when entering the inner cylinder. The gasket of the needle and the needle hub to the discharge port, and when the rod moves forward and backward, the second joint that connects the needle hub and the rod is separated by separating the rod from the needle hub and connecting the rod to the needle hub by moving the rod forward. It is provided with a connecting means for allowing the needle to flow into the outer cylinder during the push backward movement.

Disposable, safety injection, needle hub, outer cylinder, push rod, needle cap

Description

Disposable Safety Syringe {a safety injector structure}             

1 is an enlarged cross-sectional view of a disposable syringe according to the prior art,

Figure 2 is an enlarged cross-sectional view of another disposable syringe according to the prior art,

Figure 3 is an exploded perspective view of a disposable safety syringe according to an embodiment of the present invention,

4 and 5 are cross-sectional views of a disposable safety syringe according to an embodiment of the present invention,

6 is a cross-sectional view showing that the needle hub is coupled to the tapered discharge port in the disposable safety syringe according to an embodiment of the present invention;

Figure 7 is a cross-sectional view showing the separation of the needle hub and the push rod by moving the push rod when inhaling the drug solution from the injection vial using a disposable safety syringe according to an embodiment of the present invention,

Figure 8 is a cross-sectional view showing that the needle hub and the push rod coupled to the push rod advance movement during injection using a disposable safety syringe according to an embodiment of the present invention,

9 is a view for explaining the injection process using a disposable safety syringe according to an embodiment of the present invention,

10 is a cross-sectional view showing that the needle is introduced into the outer cylinder after injection using a disposable safety syringe according to an embodiment of the present invention;

11 is a cross-sectional view showing the needle bent in the inner cylinder after injection using a disposable safety syringe according to an embodiment of the present invention;

12 is a modified view of a disposable safety syringe structure according to another embodiment of the present invention,

Figure 13 is an exploded perspective view of a disposable safety syringe according to another embodiment of the present invention,

14 is a cross-sectional view of a disposable safety syringe according to yet another embodiment of the present invention.

15 is a configuration diagram of the needle cap which is covered on the outer peripheral surface of the discharge port of the outer cylinder as another embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

101; Needle 102; Needle hub

103; Straw 104; Outlet

105; Outer cylinder 105a; incline

106; Needle cap 107; stopper

109; Hanging jaw 110; Hook part

111; First joint 111a; Extension

113; Second thrust barrier 120; Second joint

130; First thrust barrier 140; Gasket

150: guide portion 160: handle

The present invention prevents bending of the needle tip when the needle cap is covered to protect the needle, and the process of covering the needle cap to discard the used syringe is unnecessary, so that the wound caused by physical contact with the needle is acquired immunity. The present invention relates to a disposable safety syringe for preventing infection of infectious diseases such as deficiency syndrome (AIDS) or hepatitis.

In more detail, the present invention is a syringe in which the outer cylinder, the needle cap, the rod and the needle hub are integrally formed, and when the rod is moved forward, the needle cap connected to the outer cylinder and the joint is separated from the outer cylinder, and the needle hub is separated from the outer cylinder. The needle is inserted into the injection and the needle is separated from the needle hub when the rod is moved backwards, and the medicine is sucked in. The injection of the needle into the human body minimizes the impact on the human body by the combination of the needle hub and the needle. The present invention relates to a disposable safety syringe in which a needle is introduced into an outer cylinder after separation from a human body, and then the needle is moved forward to destroy the needle in the outer cylinder.

1 is an enlarged cross-sectional view of the excerpt of the disposable syringe according to the prior art.

As shown, the needle hub (2) in which the needle (1) is integrally fixed, the push rod (3) is installed so as to move forward and backward, and the needle hub (2) is airtight outside the tapered discharge port (4). It is provided with a needle cap (6) detachably coupled to the outer cylinder (5) and the needle hub (2) to be in close contact in a state to protect the end of the needle (1).

7 is a stopper formed at the rear of the inner circumference of the outer cylinder 5 to prevent separation from the outer cylinder 5 when the rod 3 is moved backward.

In the disposable syringe structure shown in FIG. 1, in the process of separating the needle cap 6 from the needle hub 2 in order to use the syringe, the exposed end of the needle 1 and the needle cap 6 are used by the user. Inadvertent contact of each other due to the care of the needle (1) end is easily bent. At this time, even when the amount of bending of the tip of the injection needle 1 is minute, the person who receives the injection has a problem of having to feel the pain.

In addition, when collecting the used syringe when collecting the needle cap (6) to the needle hub (2) after the injection to prevent the collector from being injured by the pointed needle (1), needle ( 1) If the tip is injured by contacting the user's body, the deadly infections such as AIDS or hepatitis can be infected with infectious diseases, which causes a problem of low safety.

Figure 2 is an enlarged cross-sectional view of the main excerpt of another disposable syringe according to the prior art.

As shown, the needle hub 2 is integrally fixed and the needle hub 2 having the spiral protrusion 2a formed on the outer side thereof, and the spiral groove 5a corresponding to the protrusion 2a are formed in the discharge port 4. The outer cylinder 5 is formed on the side and the needle hub 2 is detachably fixed, and the push rod is installed in the outer cylinder 5 to move forward and backward and detachably connected to the needle hub 2 by a connecting means ( 3) and a needle cap (6) detachably fixed to the discharge port (4) to protect the needle (1).

At this time, the groove 2b formed on the inner surface of the needle hub 2 and the push rod 3 are formed by the connecting means, and the push rod 3 is detachably connected to the needle hub 2 to the push rod 3. Protruding pin (3a) for introducing the needle (1) into the outer cylinder (5) during backward movement.

8 is an O-ring which is mounted on the outer surface of the needle hub 2 and used to maintain the airtight state when the needle hub 2 is fixed to the discharge port 4.

In the disposable syringe structure shown in FIG. 2, the hand is used to hold the outer cylinder 5 with another hand in order to introduce the needle 1 into the outer cylinder 5 after injection, and the used hand holds the push rod 3 90. In addition, the needle hub and push rod are combined in such a way that the hand to catch the outer cylinder is suddenly injured, inadvertently pointed needle (1) end of the needle and the user's body is in contact with the wound acquired AIDS deficiency It has the disadvantage that it can not protect the user from the fatal disease infection such as.

When the needle cap 6 is separated from the discharge port 4 in order to use a syringe, the needle 1 end and the needle cap 6 are in contact with each other due to user's carelessness. This easily bends the problem.

In addition, since the O-ring 8 is mounted on the needle hub 2 for airtightness, the number of parts is increased, and the needle hub 2 and the push rod 3 are separately manufactured and assembled, thereby increasing the cost of labor due to the increase in labor cost. And there is a problem that the manufacturing cost is increased.

 It is an object of the present invention to prevent bending of the needle tip when removing the needle cap for protecting the needle, and a process of covering the needle cap to discard the used syringe is unnecessary, even when the needle is introduced into the outer cylinder. As it is not used, it provides a disposable safety syringe that protects the collector (who collects and discards the syringe) from the hepatitis caused by a wound from contact with the needle and ensures complete safety. Is in.

Another object of the present invention, the needle cap is connected to the outer cylinder and the joint is integral, shorten the workmanship to manufacture and assemble them by integrally forming a push rod connected to the needle hub and the joint, when fixing the needle hub to the outer cylinder It is to provide a disposable safety syringe that can reduce the cost and manufacturing cost because there is no need for an airtight O-ring.

delete

Still another object of the present invention is to provide a disposable safety syringe which can improve the reliability by preventing the needle hub from being released from the external cylinder or leakage of the injection liquid due to the reaction force caused by the muscle force during the injection. will be.

The stated object of the present invention is to provide an external passage having a tapered discharge port,

A needle cap connected integrally with the outer cylinder by a first joint and separated from the outer cylinder at the time of cutting the first joint by the forward movement of the push rod in the outer cylinder;                         

The needle port is easily separated from the groove of the discharge port by extending the discharge port inlet by the forward movement of the push rod, preventing the catching jaw of the needle hub from being separated from the hook part of the push rod, and when the needle tip is introduced into the outer cylinder. Gasket of elastic body to touch wall surface,

A gap preventing protrusion for preventing the opening of the needle jaw from the needle hub is dT, and the needle hub is fixed to the discharge port, and the push rod is pushed from the needle hub by cutting the second joint connecting the needle hub and the push rod during backward movement. By separating the, by connecting the push rod to the needle hub in the push rod forward movement during injection, by providing a disposable safety syringe characterized in that it has a connecting means for introducing the needle into the outer cylinder during the push rod backward movement after injection Is achieved.

Hereinafter, the present invention will be described in detail with reference to preferred embodiments and drawings. In describing the present invention, detailed descriptions of related known functions or configurations will be omitted when kseks that dT may unnecessarily obscure the subject matter of the present invention.

According to a preferred embodiment, as the connecting means, a pair of engaging jaw formed opposite the lower end of the needle hub, and fitted to the engaging jaw during scanning, so that the needle hub is separated from the discharge port to flow into the outer cylinder during the push rod backward movement It is provided with the hook part.

In addition, the needle cap is radially formed at the lower end, and the needle cap is coupled to the needle hub so that the needle cap is easily caught by the tip of the discharge port when the push rod is moved backward while the needle cap exits the discharge port. It is further equipped with a piece.

In addition, the needle hub on the outer surface of the position corresponding to the inclined tip of the discharge port is formed in an annular or a plurality of protrusions, and the needle needle is coupled to the discharge port to maintain the maximum level with respect to the blood vessel during injection or injection A first pusher preventing the gap between the discharge port and the needle hub by the side pressure of the tapered discharge port generated when the needle hub is pressed; and formed on the inner side of the discharge port so as to correspond to the protrusion formed on the outer surface of the needle hub And a second push bump preventing the needle hub from being separated from the discharge port by the tapered discharge port front pressure generated by the reaction force of the muscle during the injection after the needle hub is coupled to the discharge port.

In addition, the connecting means for detachably connecting the needle hub and the push rod, the needle hub and the push rod is formed separately, a protrusion is formed on the inner surface of the discharge port and the groove corresponding to the protrusion is formed in the needle hub, the needle hub lower end A hooking jaw is formed at the hook portion, and a hook portion facing the locking jaw is formed at the end of the pushing rod so as to be detached from the catching jaw when the push rod moves forward and backward.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are intended to describe the present invention in detail so that the present invention can be easily carried out by those skilled in the art. This does not mean that the technical spirit and scope of the present invention is limited.

3 to 15, the disposable safety syringe according to the present invention is connected to the outer cylinder 105 having a discharge hole 104, which is tapped inwardly, and is connected in a single shape by the first joint 111. The needle cap 106 is fixed to the discharge port 104 by the forward movement of the rod 103, and the needle cap 106 is separated from the outer cylinder 104 by the cutting of the first joint 111_, and the outer cylinder 105 The needle hub (1) is integrally connected to the push rod (103), which is internally movable to move forward and backward, and accommodated in the outer cylinder (105), and the needle (101) is hwjd at the tip and detachably coupled to the tapered discharge port (104). 102),

After fixing the needle hub 102 to the discharge port 104, the needle hub by cutting the second joint (120) jointly connected to the needle hub 102 and the push rod 103 in the backward movement of the push rod 103 Detach the rod 103 from the 102, connecting the rod 103 to the needle hub 102 to move the push rod 103 during the injection, the injection needle 101 to move the rod 103 after the injection back to the human body It is provided with a connecting means to be introduced into the outer cylinder (105).

As the connecting means, the lower jaw 109 is formed by maintaining a predetermined interval to face the lower end of the needle hub 103, and is detachably fitted to the locking jaw 109 during injection into the human body and the push rod ( 103 is provided with a hook portion 110 to move the needle hub 102 from the discharge port 104 in the reverse movement to flow into the outer cylinder 105.

On the other hand, the outer side of the needle hub 102 at the position corresponding to the inclined tip of the discharge port 104 is formed in the annular or a plurality of protrusions, the needle hub 102 is fixed to the discharge port 104 and the blood vessel at the time of injection The discharge port 104 and the needle hub by the surface pressure of the discharge port 104 by the side pressure of the tapered discharge port 104 generated when the needle 101 or the needle hub 102 is pressurized to be as horizontal as possible. A first thrust preventing jaw 130 for preventing a gap between the 102 and

It is formed on the inner surface of the discharge port 104 to correspond to the protrusion 102a formed on the outer surface of the needle hub 102, the tapered tape generated by the reaction force of the syringe muscle after coupling the needle hub 102 to the discharge hole 104 A second pusher jaw 113 for preventing separation of the needle hub 102 from the discharge port 104 by the front pressure of the discharge port 104 is provided.

In the figure, a stopper formed on the inner circumference of the outer cylinder 105 so as to prevent the push rod 103 from being separated from the outer cylinder 105, and 140 is the outer cylinder 105 to prevent the push rod 103 from being separated. The stopper, 140 formed at the periphery, is a gasket mounted on the upper end of the rod 103 and hermetically sealed.

Hereinafter, with reference to the accompanying drawings an example of the use of a disposable safety syringe according to the present invention Figures 4, 5 to 15 as follows.

As illustrated in FIG. 4, the aforementioned needle cap 106 is connected to the first joint 111 at the tip of the outer cylinder 105, and integrally formed by the second joint 120 at the tip of the rod 103. The connected needle hub 102 is a view showing a state of injecting into the inner cylinder 105 through the lower end of the outer cylinder 105.

As shown in FIG. 5, in order to use the syringe, the user holds the outer cylinder 105 downward with one hand, and moves the push rod 103 slightly forward so that the outer cylinder 105 and the first joint are moved. The needle cap 106 integrally connected through the flesh 111 is separated. In addition, the needle hub 102 integrally connected through the rod 103 and the second joint 120 is coupled to the discharge port 104 of the outer cylinder 105. Therefore, in order to use the needle 101 described above, the needle cap 106 is gripped with the other hand so that the process of separating the needle cap 102 from the needle hub 102 becomes unnecessary, thereby preventing bending of the tip of the needle 101. Will be.

Next, as shown in FIG. 6, at the same time as the needle cap 106 is removed, the protrusion 102a of the needle 102 is coupled to the second pusher jaw 113 of the discharge port 104, and the needle hub 102. The first rolling prevention jaw 130 is caught by the angular tip of the discharge port 104.

This prevents the occurrence of a gap between the above-mentioned tapered discharge port 104 and the needle hub 102 formed corresponding thereto, thereby maintaining airtightness.

Next, as shown in Fig. 7, the needle hub 102 is inserted into the injection bottle 101 with respect to the injection medicine bottle A while being fixedly supported by the discharge port 104 of the outer cylinder 105, As the 103 is moved backward, the drug solution flows from the injection bottle A into the outer cylinder 105. At this time, the second jaw 120 is connected to the hooking jaw 109 of the needle hub 102 and the hook portion 110 of the push rod 103 integrally connected when the push rod 103 is moved, the needle is cut. The push rod 103 is separated from the hub 102.

At this time, the needle hub 102 is prevented from flowing in the front and rear direction by the fitting of the second sliding prevention jaw 113 formed on the inner surface of the discharge port 104 and the protrusion 102a of the needle hub 102, the outer cylinder ( 105) Prevent from entering inside. The second joint 120 is formed to be easily cut and separated by connecting at right angles between the locking jaw 109 of the needle hub 102 and the tip of the pusher hook 110 so that the left and right are opposed to each other.

Next, as shown in FIG. 8, the air is discharged by slightly moving the push rod 103 and then injected into the human body while moving the push rod 103 to administer the chemical liquid.

At this time, the hook 110 formed at the upper end of the rod 103 is inserted through the space between the locking jaws 109 with respect to the locking jaw 109 formed at the lower end of the needle hub 102, so that the needle is not impacted to the patient. Hub 102 and push rod are integrally coupled.

At this time, when pressing the push rod 103 to press the inclined surface (140a) of the gasket 14 wraps around the locking jaw 109 of the needle hub 102 by the close contact between the inclined surface (102d) of the needle hub (102) Since it is supported to prevent the hooking jaw 109 of the needle hub 102 and the hook portion 110 of the push rod 103 to prevent separation, the gasket 140b pushes the inclined surface 105a of the outer cylinder 105 to expand Accordingly, the needle hub 102 can be easily separated from the discharge port 104.

In addition, by placing an anti-splitting protrusion under the protrusion 102a of the needle hub 102, the locking jaw of the needle hub is prevented from opening. On the other hand, as the used needle 101 is introduced into the outer cylinder 105 due to the backward movement of the rod 103, it is unnecessary to cover the needle cap 106 on the needle 101 of the needle hub 102 do.

Due to this, the tip generated when the needle cap 106 is applied to the needle hub 102 to recover the used needle 101 is wound due to physical contact with the sharp needle 101 and from the infectious germs of the subject. It helps to prevent infection.

As shown in FIG. 9, when the syringe 103 is pressed with the syringe slightly lying on the skin to give the patient an injection, that is, when the needle 101 is inserted and injected into the human body, it is as horizontal as possible with respect to the blood vessel. Since the needle 101 or the needle hub 102 is pressurized to maintain the lateral pressure in the tapered discharge port 104 of the outer cylinder 105, the needle hub 102 has an annular or several protruding points. The gap between the needle hub 102 and the discharge port 104 can be prevented from being separated and formed by the first push-out jaw 130 which is formed and supported at the tip of the tapered discharge port 105.

When the front pressure is generated in the above-described discharge port 104, the inclined surface 105a of the outer cylinder 9905 contracts in the radial direction to press the protrusion 102a of the needle hub 102 to tighten the needle hub 102. Accordingly, the needle hub 102 is prevented from flowing back and forth with respect to the outer cylinder 105.

Therefore, due to the dual structure of the first push-out jaw 130 corresponding to the side pressure formed on the upper and lower sides of the needle hub 102 and the protrusion 120a corresponding to the front pressure, the ejection holes 104 are formed at the time of scanning. Since it can withstand the pressure, it is possible to prevent the injection liquid from being exposed from the outer cylinder 105, and to prevent the needle hub 102 from being separated from the discharge port 104.

In addition, as shown in FIG. 10, when the needle 101 is completely introduced into the outer cylinder 105 by the backward movement of the rod 103, the rod 103 is moved forward slightly. Since the hooking jaw 109 of the needle hub 102 is fluidly coupled to the hook portion 110, the end portion of the needle 101 is hooked to the inner wall 105 of the outer cylinder 105, and thus is fully pressurized and bent. Of course, it is possible to prevent the safety accident that the collector is injured due to the sharp needle 101 in the process of recovering.

As described above, the disposable safety syringe according to the present invention scans the needle cap 106 from the outer cylinder 105 by moving the push rod 103 slightly in the state in which the outer cylinder 105 is held downward by one hand. It is not necessary to cover the needle cap 106 to prevent the needle 101 from being bent and to recover the used needle 101 as the needle 101 is introduced into the outer cylinder 105 after the injection. Done.

As shown in FIG. 11, the needle 103 is moved forward and the needle 101 is bent inside the outer cylinder 105, and is destroyed.

Because of this, the needle cap 106 is not necessary to separate or cover the needle 101 so that the user is injured or injured by the sharp needle 101 and is completely infected. It can prevent and secure safety.

Meanwhile, as shown in FIG. 12, the disposable safety syringe according to another embodiment of the present invention is formed by separately separating the needle hub 102 and the push rod 103, and protruding from the inner side of the data discharge outlet 104. And forming a groove 102c corresponding to the protrusion 113 in the needle hub 102, and forming a hook portion 102b at the lower end and moving the rod 103 back and forth. It is possible to form a pair of engaging jaw (103b) formed at the end of the pusher 103 to face the predetermined interval so as to be detached from the water.

On the other hand, as shown in Figure 13, the disposable safety syringe according to another embodiment of the present invention, is formed radially on the lower end of the needle cap 106, the needle cap 106 is coupled to the needle hub 102 An extension piece which is easily caught by the needle cap 103 from the needle hub 103 by being caught by the tip of the discharge hole 104 when the needle cap 106 is moved backward while the needle cap 106 has exited the outer cylinder discharge port 104. 111a is provided.

The hook portion 110 formed at the tip of the rod 103 and the hooking jaw 109 formed at the lower end of the needle hub 102 by the second joint 120 are integrally formed, and then the needle is moved forward by the rod 103. After the hub 102 is coupled to the discharge hole 104, the needle hub 102 and the push rod 103 are separated from each other when the push rod 103 is moved backward, and is formed on the outer side of the needle hub 102 and discharge holes 104 are formed. And a first pusher preventing jaw 130 which prevents a gap between the discharge port 104 and the needle hub 102 due to the side pressure of the discharge hole 104, and is formed on the inner side of the discharge hole 104 and is applied to the front pressure of the discharge hole 104. The second push jaw 113, which prevents the needle hub 102 from being separated from the tool tool 104 by the same, is substantially the same as that shown in FIG. 3, and thus the detailed description of the configuration and operation thereof will be omitted. The duplicate reference numerals indicate the same.

On the other hand, as shown in Figure 14, the disposable safety syringe according to another embodiment of the present invention is integrally formed by the outer cylinder 105 and the first joint 11 having an inlet 104 tapered inwardly Is connected to the needle hub 106 is separated from the outer cylinder 105 by the cutting of the first joint 111 while the needle hub 102 is fixed to the discharge port 104 by the forward movement of the push rod 103, The circular guide portion 150 and the guide portion 150 to be in close contact with the inside of the outer cylinder integrally to the tip of the push rod 103 which is installed in the outer cylinder 105 to move forward and backward, and is connected to the outer cylinder 105 The needle hub 102 accommodated and detachably coupled to the tapered discharge port 104 and the needle 101 is fixed to the tip, and the needle hub 102 is fixed to the discharge port 104, and then the push rod 103 is fixed. The needle hub 102 is cut by the cutting of the second joint 120 that connects the needle hub 102 and the push rod 103 integrally at the time of backward movement. It is provided with a connecting means for introducing the needle 101 into the outer cylinder 105 during the backward movement of the rotor pole 103.

With the connecting means, a pair of locking jaw 109 is formed by maintaining a predetermined interval to face the lower end of the needle hub 103, and is detachably fitted to the locking jaw 109 during injection into the human body and push rod 103 The hook hub 110 is provided to allow the needle hub 102 to be separated from the discharge port 104 and introduced into the outer cylinder 105 during the backward movement.

On the other hand, the outer side of the needle hub 102 at the position corresponding to the inclined tip of the discharge port 104 is formed in the annular or a plurality of protrusions, the needle hub 102 is fixed to the discharge port 104 and the blood vessel at the time of injection The discharge port 104 and the needle hub by the side pressure of the discharge port 104 by the side pressure of the tapered discharge port 104 generated when the needle 101 or the needle hub 102 is pressurized to be as horizontal as possible. A first pusher jaw 130 to prevent the gap is generated between the 102 and the needle hub 102 is formed on the inner surface of the discharge port 104 corresponding to the protrusion 102a formed on the outer surface, the needle hub ( The second pusher jaw preventing the separation of the needle hub 102 from the discharge port 104 by the front pressure of the tapered discharge port 104 generated by the reaction force of the syringe muscle after coupling the 102 to the discharge port 104 ( 113).

The connecting means includes a pair of hooking jaws that are formed to face the lower end of the needle hub and a hook portion that fits into the hooking jaw when the runner is moved backward and moves the needle hub from the discharge port to move into the outer cylinder when the push rod is moved backward. .

By installing a compression spring or leaf spring 160 on the outer periphery of the push rod is provided with a push rod always positioned to the rear of the outer cylinder. The tip of the handle 103a of the push rod is eccentrically formed so that the push rod rotates slightly in the pressing process.

As shown in FIG. 15, the needle cap 106 is fixed to the outer circumferential surface of the discharge port 104 of the outer cylinder 105 to be fixed, and the needle hub 102 coupled with the push rod 103 is used through the discharge hole 104. While seated, the needle cap 106 is pushed forward and provided to separate the needle cap 106 from the outer circumferential surface of the discharge port 104.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but it will be apparent to those skilled in the art that various modifications are possible without departing from the scope of the present invention.

Disposable safety syringe according to the present invention has the following advantages.

When the needle is placed with one hand, the needle cap prevents the needle from bending when the needle cap is removed, and the needle cap is not required to throw away the used syringe. Since one hand is not used, safety can be secured by protecting the collector and the collector recovering the syringe from infection due to a wound when the needle contacts the body.

In addition, the needle hub and the push rod is formed integrally, and the outer cylinder discharge port forms an engaging groove through which the inner paper and the needle hub can be caught, and the outer cylinder and the needle cap are integrally formed to shorten the manufacturing and assembling work. The O-ring, which is installed to keep the needle hub confidential, is unnecessary, so that the disposable cost and safety can be satisfied at the same time by reducing the cost and manufacturing cost.

In addition, since the needle hub and the push rod are formed integrally and the outer cylinder and the needle cap are integrally connected, when the rod is moved forward, the needle cap connected to the joints from the outer cylinder is separated by the front end of the joint, and at the same time the discharge port of the needle hub outer cylinder. When combined, the push rod can be separated from the needle hub when moving forward and backward, thereby preventing the syringe from being reused, thereby preventing the spread of the tip.

In addition, the needle hub is prevented from being released from the external cylinder or exposed to the injection fluid due to the lateral pressure generated at the tapered discharge port when the needle or the needle hub is pressurized to keep the blood vessel as horizontal as possible. It can improve the reliability.

Claims (9)

In a disposable safety syringe, The outer passage by the outer cylinder first joint having a tapered discharge port; A needle cap integrally connected and separated from the outer cylinder by cutting the first joint by the forward movement of the push rod in the outer cylinder; The needle port is easily separated from the groove of the discharge port by extending the discharge port inlet by the forward movement of the push rod, preventing the hooked jaw of the needle hub from being separated from the hook of the push rod, and when the needle tip is introduced into the outer cylinder, the inner wall surface A gasket for contacting; When the needle hub is fixed to the discharge port, the push rod separates the push rod from the needle hub by cutting the second joint connecting the needle hub and the push rod when the rod moves forward and backward, and connects the push rod to the needle hub by moving the push rod forward during injection. Disposable safety syringe, characterized in that it comprises a connecting means for allowing the needle to flow into the outer cylinder during the reverse movement after the injection. The method of claim 1, The connecting means is provided with a pair of engaging jaw formed opposite the lower end of the needle hub and a hook portion to be fitted to the engaging jaw during scanning and to move the needle hub from the discharge port to move into the outer cylinder when the push rod is moved backward, Disposable safety syringe, characterized in that the needle hub is coupled to the hook portion of the locking jaw and the push rod to form a gap preventing projection for preventing the opening of the locking jaw when the inflow. The method according to claim 1 or 2, It is formed at the position corresponding to the inclined tip of the discharge port with an annular or protruding point on the outer surface of the needle hub, and when the needle hub is coupled to the discharge port, it is generated when the needle or the needle hub is pressurized to maintain maximum horizontality with respect to blood vessels during injection A first push bump preventing the gap between the discharge port and the needle hub by the side pressure of the tapered discharge port being generated; It is formed on the inner side of the discharge port corresponding to the protrusion formed on the outer side of the needle hub, the needle hub is separated from the discharge port by the front pressure of the tapered discharge port generated by the reaction force of the muscle during injection after coupling the needle hub to the discharge port Disposable safety syringe, characterized in that it has a second pusher preventing jaw to prevent In a disposable safety syringe, An outer cylinder having a tapered discharge port; An extension piece which is radially formed at the lower end of the needle cap, the needle cap is coupled to the needle hub so that the needle cap is easily caught by the tip of the discharge port when the push rod moves backward while the needle cap exits the discharge port; The needle port is easily detached from the groove of the discharge port by making the discharge opening inlet by moving the push rod forward, and preventing the catching jaw of the needle hub from being separated from the hook part of the push rod, and when the needle tip is introduced into the outer cylinder. A gasket for touching the wall; When the needle hub is fixed to the discharge port, the push rod separates the push rod from the needle hub by cutting the second joint connecting the needle hub and the push rod when the rod moves forward and backward, and connects the push rod to the needle hub by moving the push rod forward during injection. Disposable safety syringe, characterized in that it comprises a connecting means for allowing the needle to flow into the outer cylinder during the reverse movement after the injection. In the first safety syringe, An outer cylinder having a tapered discharge port; The connecting means for detachably coupling the needle hub and the push rod coupled to the discharge port, connecting the needle hub and the push rod with a joint, a protrusion is formed on the inner surface of the discharge port and the groove opposite to the discharge port is in the needle hub It is formed, the hook portion is formed on the needle hub Hannu, the engaging jaw opposite to the hook portion is formed at the end of the push rod so that the hook portion can be detached when moving the push rod forward and backward, The needle port is easily separated from the groove of the discharge port by extending the discharge port inlet by the forward movement of the push rod, and the hook portion of the needle hub is prevented from being separated from the latching jaw of the push rod. A gasket for contacting; When the needle hub is fixed to the discharge port, the push rod is separated from the needle hub by cutting the second joint connecting the needle hub and the push rod when the push rod advances back and forth, and connects the push rod to the needle hub by moving the push rod forward during injection. Disposable safety syringe, characterized in that it comprises a connecting means for injecting the needle into the outer cylinder when the rod moves backward after injection. In a disposable safety syringe, An outer passage having a tapered discharge port; A needle cap which is integrally connected by the first joint and is separated from the outer cylinder by cutting the first joint while the needle hub is fixed to the discharge port by the forward movement of the push rod; A circular guide part which is integrally connected to the inside of the outer cylinder and integrally connected to the tip of the push rod which is installed in the outer cylinder to move forward and backward; A needle hub which is connected to the guide part and is received in an outer cylinder, and the needle is fixed to the tip and detachably coupled to the tapered discharge port; The needle hub is fixed to the discharge port, and when the rod is moved forward and backward, the needle hub is separated from the needle hub by cutting the second joint that integrally connects the needle hub and the rod together, and the rod is connected to the needle hub by forward movement. Disposable safety syringe, characterized in that provided with a connecting means for injecting the needle into the outer cylinder when the rod moves backward after injection to the human body. The method of claim 6, Disposable safety syringe, characterized in that the compression spring or the leaf spring is installed on the outer circumference of the push rod so that the push rod is always positioned to the rear of the outer cylinder. The method according to claim 6 or 7, Disposable safety syringe, characterized in that the handle is formed eccentrically to the end of the push rod so that the push rod is rotated in the pressing process to facilitate the coupling of the push rod and the hub. In a disposable safety syringe, An outer passage having a tapered discharge port; A needle cap which is fixed by covering a needle cap on an outer circumferential surface of the outer cylinder, and is separated from the outer circumferential surface of the outlet by pushing the needle cap forward while the needle hub coupled to the push rod is seated through the discharge port during use; A circular guide part which is integrally attached to the tip of the push rod which is installed in the outer cylinder so as to move forward and backward in the outer cylinder and is connected to the guide part to maintain airtightness and is accommodated in the outer cylinder and the needle is fixed to the tip and tapered. A needle hub detachably coupled to the discharge port; The needle hub is fixed to the discharge port, and when the rod is moved forward and backward, the needle hub is separated from the needle hub by cutting the second joint that integrally connects the needle hub and the rod together, and the rod is connected to the needle hub as the rod moves forward. Disposable safety syringe, characterized in that provided with a connecting means for injecting the needle into the outer cylinder when the rod moves backward after injection to the human body.

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