WO2010101392A2

WO2010101392A2 - Disposable safety syringe

Info

Publication number: WO2010101392A2
Application number: PCT/KR2010/001298
Authority: WO
Inventors: 백우인
Original assignee: Baik Woo In
Priority date: 2009-03-02
Filing date: 2010-03-02
Publication date: 2010-09-10
Also published as: KR101062007B1; WO2010101392A3; KR20100098919A

Abstract

The present invention relates to a disposable safety syringe, in which the configuration is partially modified and some components are added. A needle-fixing tube smoothly moves in a backward direction and enters a cylinder when a push rod is pulled backwards toward the opposite side of an adaptor tube to be discarded after using the syringe. The airtightness between the adaptor tube and the cylinder is perfectly maintained by a gasket ring when the adaptor tube is inserted into the cylinder, and the adaptor tube is caught by the cylinder in an accurate and firm manner when an insertion tube is joined to the adaptor tube. For this purpose, a spiral insertion tube, the adaptor tube with the gasket ring, and the insertion tube are sequentially inserted into the cylinder such that the needle-fixing tube is fastened to the spiral insertion tube outside the cylinder. When the insertion tube is joined to the adaptor tube, the sealing force of the gasket ring is maintained at a full level, and the adaptor tube is caught by the cylinder to be prevented from moving in the backward direction. When the insertion tube is released from the adaptor tube, the sealing force of the gasket ring is removed, and the adaptor tube is released from the cylinder to smoothly move in the backward direction.

Description

Disposable safety syringe

The present invention relates to a disposable safety syringe, and more specifically, the injection liquid can be placed inside the cylinder while the needle fixing tube in which the needle is fixed is not allowed to be reused again after being used once. The sealing force is greatly improved so as not to leak.

Generally, a disposable syringe has a cylinder 1 formed therein with a space therein and a coupling tube 2 in a stepped state as shown in FIGS. 1 to 3, and the space within the cylinder includes a cylinder 1. The push rod 3 is fitted to be moved forward and backward along the longitudinal direction, and the front side of the push rod moves compressive force while moving forward and backward in the airtight contact state with the cylinder 1 when the push rod 3 is moved forward and backward. Piston (4) is coupled to provide or provide a suction force, the needle coupling tube (5) is detachably coupled to the coupling tube (2) formed in the cylinder (1) from the outside, when used in the needle fixing tube The needle 6 is fixed so as to be inserted into the skin of the patient, and the needle fixing cap 7 is detachably coupled to the needle fixing tube 5 so as to protect the needle 6 in a completely wrapped state. It is a structure.

Referring to the use of such a general disposable syringe is as follows.

2 is a longitudinal sectional view showing a generally used disposable syringe, in which the push rod with the piston is moved to the rear side before injection, in this state, it is coupled to the space-loading push rod 3 in the cylinder 1. The injection liquid is sucked and filled in the left part of the figure on the basis of the piston (4).

In order to inject the injection liquid into the space in the cylinder 1, the user (doctor or nurse) before the injection needle protection that protects the needle (6) in the state fixed to the needle fixing tube (5) The cap 7 is separated from the needle fixing tube 5 so that the needle 6 is exposed to the outside and the push rod 3 inserted into the space portion of the cylinder 1 is moved forward. At the end of the needle 6 to be immersed in the injection liquid filled in the injection container (not shown), and then pull the back (3) back to move the piston (4) together with the push rod When the piston 4 coupled to the pusher 3 is moved backward by the pulling of the pusher 3 in the above, the injection liquid is provided in this process as the suction force is provided to the space in the cylinder 1. A bucket Is drawn through the injection needle (6) is an injection solution that is fixed to the needle gojeonggwan 5, which becomes possible is understood filled in a space portion in the cylinder (1).

In the state as shown in FIG. 2, the user moves the cylinder 1 to the front of the patient, inserts the needle 6 into the patient's skin, and then pushes the push rod 3 to provide a piston 4 provided on the push rod. In the forward direction, as the compression force is provided to the left part of the drawing based on the piston 4 of the space part in the cylinder 1, the injection liquid filled in the space part of the cylinder 1 receives the compression force and the cylinder (1). The injection solution exiting the coupling tube (2) formed in the), and exits the coupling tube is continuously administered into the patient's skin through the needle (6) fixed to the needle fixing tube (5), This state is attached to FIG. 3.

In addition, after the use of the syringe, the needle protection cap (7), which was separated, is re-coupled to the needle fixing tube (5) coupled to the coupling pipe (2) of the cylinder (1). The needle (5) must be completely wrapped and then discarded.

The general disposable syringe described above is a situation in which the disposable disposable syringe is protected after being completely covered with the needle 6 fixed to the needle fixing tube 5 as the needle protection cap 7 when discarded after use. In the process, the doctor or nurse as a user has a problem that a safety accident is often stuck in the needle (6), and if the general disposable syringe is used in patients with infectious pathogens, such as AIDS patients, the seriousness of the safety accident I think it will grow.

On the other hand, even if the problem does not occur in the process of using a disposable syringe, since the medical waste is handled by a specialized waste disposal company, the needle protection cap that protects the needle 6 in this process ( While 7) is separated, the worker who handles the waste may be stuck in the needle 6, and in this case, there was a problem of the above-mentioned safety accident.

Therefore, in the industry of manufacturing medical machinery and apparatus, in order to solve the problems of the above-mentioned general disposable syringes, the disposable safety syringes which are used for single use and do not cause accidents caused by needles in the process of disposal after use are widely used. There is a situation.

Then, with reference to Figures 4 to 6 attached to the disposable safety syringe according to the prior art as follows.

One end of the front and the other end of the rear in communication with a space therein has a cylinder 11 formed with a coupling tube 12 in a stepped state, the space within the cylinder of the cylinder 11 The push rod 13 is fitted to be moved forward and backward along the longitudinal direction, and the front side of the push rod moves compressive force while moving forward and backward in the airtight contact state with the cylinder 11 when the push rod 13 is moved forward and backward. Piston 14 is coupled to provide or provide suction force, and the needle fixing tube 15 is spaced in the cylinder 11 so that the front end thereof is exposed to the outside in the coupling tube 12 formed in the cylinder 11. It is fitted at the side and coupled, and the needle (16) is fixed to the front of the cylinder (11) outside of the needle fixing tube to be inserted into the skin of the patient when in use, formed in front of the cylinder (11) The needle protection cap 17 is detachably coupled to the outer side of the coupling pipe 12 so as to protect the needle 16 in a wrapped state, and the rod is close to the piston 14 of the rod 13. The cutting groove 18 is formed so that the 13 can be easily cut.

Meanwhile, a flange 15a is formed at the rear outer circumference of the needle fixing tube 15 so as to catch the integrated stepped portion as the coupling tube 12 is stepped on the cylinder 11, which is the needle fixing tube. In the state in which 15 is fitted into the coupling pipe 12 formed in the cylinder 11, the forward movement of the needle fixing tube 15 is limited by the flange 15a, and the cylinder 11 O-ring 19 is fitted to the inner diameter of the coupling tube 12 formed in the needle ring tube 15 is coupled to the coupling tube 12 formed in the cylinder 11 in the state that the O-ring 19 coupling tube It is to maintain the clearance between the 12 and the needle fixing tube 15 in the airtight state.

In addition, a pair of locking jaws 15b are formed at the inner end of the rear end of the needle fixing tube 15 so as to face each other, and at the front end of the rod 13, the needle fixing tube at any moment pushing the rod completely forward ( A locking piece 13a is formed to overcome the interference with the locking step 15b formed in the inner diameter portion of the 15 and to be caught by the locking step, and a part facing the locking piece 13a of the locking step 15b. And a portion facing the locking jaw 15b of the locking piece is an interference force due to contact when the locking piece 13a overcomes the interference force of the locking jaw 15b and is fitted into the rear inner diameter of the needle fixing tube 15. Have a slope to get as little as possible.

* Referring to the process of using a disposable safety syringe according to the conventional embodiment configured as described above is as follows.

5 is a longitudinal cross-sectional view showing a disposable safety syringe according to a conventional embodiment, in which a piston is moved backward with a push rod before injection, in this state, a space-loading push rod 13 in the cylinder 11 is provided. The injection liquid is sucked and filled in the left part of the drawing on the basis of the coupled piston 14, and the procedure for allowing the injection liquid to be sucked and filled into the space part of the cylinder 11 is referred to the procedure of a general disposable syringe described above. If it is enough to understand, it will be omitted.

In the state as shown in FIG. 5, the user grasps the cylinder 11 by hand, moves it toward the patient, inserts the needle 16 fixed in the needle fixing tube 15 into the patient's skin, and then pushes the push rod 13. When the piston 14 is moved forward together with the push rod, a compression force is supplied to the space part in the cylinder 11 as the compression force is provided to the left part of the drawing based on the piston 14 of the space part in the cylinder 11. In the coupling tube 12 formed at the front of the cylinder 11, the needle fixing tube 15 is fitted in the state in which the needle 16 is fixed, and thus the space in the cylinder 11 is coupled. The injection solution filled in is continuously administered into the patient's skin through the needle 16, and the injection solution is completed in FIG.

In the state in which the needle fixing tube 15 is inserted into and coupled to the coupling tube 12 formed in the cylinder 11, the flange 15a formed around the rear outer side of the needle fixing tube is coupled to the cylinder 11. ) Is stepped to form an integrated stepped portion, so that the forward movement of the needle fixing tube 15 is limited by the flange 15a, in which case the coupling tube 12 formed in the cylinder 11 O-ring (19) fitted in the inner diameter of the) keeps the gap between the coupling pipe 12 and the needle fixing tube 15 in the airtight state, so the space in the cylinder 11 in accordance with the forward movement of the push rod (13) As the injection liquid filled in the part exits the cylinder, it does not easily leak to the outside when the administration is made.

In this state, the injection solution is completed to the patient in the state that the piston 14 together with the push rod 13 is completely moved forward. In this state, the push rod 13 is shown in FIG. 6. The needle (13a) formed at the front end of the needle to overcome the locking force of the locking jaw (15b) formed in a state opposed to each other around the rear inner diameter of the needle fixing tube 15 due to the elastic force of the material itself It fits into the inner diameter of the fixing tube 15 and is caught by the locking step 15b.

In the state shown in FIG. 6, the cylinder 11 is moved to the opposite side of the patient to remove the injection needle 16 inserted into the patient's skin and at the same time holding the cylinder 11 with one hand and pushing the rod with the other hand ( 13) is pulled rearward strongly, the locking piece 13a formed at the front end of the push rod is fitted into the rear inner diameter of the needle fixing tube 15 and is caught by the locking jaw 15b formed at the rear inner diameter. Accordingly, the push rod 13 is moved to the rear side together with the needle fixing tube 15 and completely enters into the space in the cylinder 11 as shown in FIG. 7, in which case the needle fixed to the needle fixing tube 15 ( 16 is also completely entered into the space portion in the cylinder 11, the needle holding tube 15 is positioned in the state that the needle holding tube 15 is completely entered into the space portion in the cylinder 11, Due to the eccentric center of gravity as the end is hung on the front end of the push rod 13, the rear end, which is the point of engagement with the push rod, can only be tilted in the direction of gravity, in which case the needle clamp tube Since only the front end of the needle 16 fixed to 15 is in contact with the inner diameter portion of the cylinder 11, the needle fixing tube 15 and the needle 16 maintain the inclined state in an oblique state.

Since the cutting groove 18 formed in the push rod 13 is positioned in a state close to the rear outer side of the cylinder 11, and then repeatedly pressed the push rod 13 in the direction orthogonal to the longitudinal direction, The cutting groove 18 of the push rod 13 is cut as shown in FIG. 8 by the pressing force, and after the push rod is cut, the outer part push rod of the cylinder 11 is moved from the front side so that the cut portion enters the inside. As shown in FIG. 9 through the coupling pipe 12 so that the injection needle 16, which was entered into the space portion in the cylinder 11 during the disposal process does not escape to the outside through the coupling pipe 12.

Therefore, since the needle 16 does not escape from the inside of the cylinder 11 to the outside in any case, the user does not get stuck on the needle 16 in the process of discarding the used syringe, as well as processing the discarded syringe. The worker who handles the waste in the process is not stuck to the needle 16 will not cause a safety accident.

However, since the conventional disposable safety syringe according to one embodiment uses the O-ring (19) to seal in order to maintain the airtight state between the needle fixing tube 15 and the coupling tube 12 has the following problems.

First, in view of the fact that the O-ring 19 is a component having a very sensitive deformation even by low external pressure, the aligned O-ring 19 is moved to the cylinder 11 as well as in the process of the various parts being aligned through the automatic assembly line for assembling the syringe. In the process of inserting into the coupling tube 12 of the) is easily crushed, and thus the O-ring 19 is not inserted into the coupling tube 12 stably the defect rate is high, as well as to solve the problem a little. In order to provide a variety of complex additional equipment to the assembly line, the cost burden increases the product cost.

Second, since the defective state of the O-ring 19 is mostly not easily identified by the naked eye, there is a high probability that the defective O-ring is used, and in this case, the injection liquid leaks in the process of using the assembled syringe. You will be hugged.

Meanwhile, in order to solve the problem of the disposable safety syringe according to the conventional embodiment, the applicant of the present invention applied for a disposable safety syringe with the Republic of Korea Application No. 10-2004-14356 on March 3, 2004 and registered as 10-0566568. If the problem is described in another conventional embodiment as follows.

The problem with the conventional disposable safety syringe of another embodiment can be seen by the attached FIG.

First, a flange 109a formed in a substantially elliptical shape at the end of the outer tube 105, which is the rear of the needle fixing tube 109, is formed on the spiral protrusion 102a formed directly in the inner diameter portion of the coupling tube 102 of the cylinder 101. As the needle fixing tube 109 is screwed into the injection liquid discharge tube 106 and is coupled, the flange 109a does not completely ride the spiral protrusion 102a while the needle fixing tube 109 is coupled. If a case occurs, the flange 109a is still hung on the spiral protrusion 102a, and in this case, as the doctor or nurse, who is a user after using the syringe, pulls the push rod 103 backward for disposal. Even if the fitting tube 107 and the adapter tube 105 are moved backwards in order, the needle fixing tube 109 remains intact while being separated from the injection liquid discharge tube 106 formed in the adapter tube 105, so that the needle 108 is eventually used. Go Gojeonggwan the injection needle 109 which is able to enter into the cylinder (101).

Second, in the state where the fitting pipe 107 is fitted toward the pusher 103, which is the rear of the adapter tube 105, the semicircular protrusion 105c formed around the outer diameter of the adapter tube 105 is formed of the cylinder 101. Inserted into the semi-circular recessed groove 101b formed around the inner diameter portion, in this process the projection piece 105c has a strong contact force to the cylinder 101 in the recessed groove 101b, the adapter tube 105 And the cylinder 101 to maintain the airtight, as well as the hook of the adapter tube 105 is made when the needle fixing tube 109 is fitted into the injection liquid discharge tube 106 formed in the adapter tube when the adapter tube 105 ) Is a structure that is not pushed backward, the protruding piece 105c and the cylinder 101 formed in the outer tube 105 are all synthetic resins of the same series as the cushioning force is dropped, the airtight maintenance is made perfectly Injectable fluid is lost during use The leakage between the linder 101 and the adapter tube 105 often occurs, as well as the protrusion piece 105c and the recessed groove 101b are semi-circular to enhance the sealing force, so that the locking force is also lowered for use. When inserting the needle fixing tube 109 into the injection liquid discharge tube 106 of 105, the adapter tube 105 is frequently moved backward due to the pressing force toward the pushing rod 103.

The present invention has been made to solve the problems of the above-described one embodiment and another embodiment, an object of the present invention is a screw insertion tube made separately from the cylinder without screwing the needle fixing tube to which the needle is fixed directly to the cylinder The needle is fixed when the needle is pulled against the rear of the adapter tube for disposal of the syringe after the injection is made as the needle fixing tube is inserted into the injection liquid discharge tube formed in the adapter tube even when screwed in. The needle holder tube is moved to the rear smoothly with the adapter tube to enter the cylinder.

Another object of the present invention is to combine the gasket ring having a cushioning force in the outer diameter of the outer tube in which the injection liquid discharge pipe is formed so that the sealing force is improved while the gasket ring is hermetically contacted to the cylinder in the state where the outer tube is fitted into the cylinder. Therefore, in the process of use, the injection liquid does not leak out through the cylinder and the adapter tube under any circumstances.

Another object of the present invention is to form a plurality of protrusions to be spaced apart in the circumferential direction at the end of the push rod, which is the rear of the outer tube and having a c-shaped cross-section so that the end of each of the protrusions is inserted into the inner diameter of the cylinder In the state where the fitting tube is fitted to the rear of the adapter tube inserted into the cylinder by forming the recess groove, each protruding piece of the adapter tube is completely caught in the recess groove so that the needle is fixed with the injection liquid discharge tube formed in the adapter tube. It is to ensure that the adapter tube is never pushed back toward the pusher when the fixing tube is fitted.

Disposable safety syringe according to the present invention for achieving the above object, the front end and the other end of the rear end in a state in communication with a space therein, the end is connected to the stepped coupling tube formed in the front; A push rod coupled to the cylinder to be able to provide a compressive force or a suction force in an airtight contact with the cylinder and movably fitted in a space in the cylinder; The spiral insertion tube is inserted in a state in which the circumferential rotation is impossible in the circumferential direction in the front of the coupling portion forming part of the space in the cylinder, and is axially communicable with the space in the cylinder, and has a spiral protrusion formed on the inner diameter thereof in a spiral shape. ; An adapter tube which is inserted between the push rod and the spiral insertion tube among the space portions in the cylinder and is integrally formed with the space in the cylinder so as to be inserted through the communication portion of the spiral insertion tube and is integrally formed with the injection tube; An injection needle fixing tube which is inserted into the injection liquid discharge tube of the adapter tube when the elliptical flange formed integrally at the end of the injection liquid discharge tube coupling portion at the rear of the injection needle is fixed to the spiral protrusion of the spiral insertion tube when the needle is fixed; A gasket ring fitted to an outer diameter portion of the outer tube and preventing the injection liquid from leaking between the cylinder and the outer tube while being in airtight contact with the cylinder when the pressing force is released in the circumferential direction when the outer tube is inserted into the space portion in the cylinder; A fitting tube inserted into the space communicating part of the cylinder and inserted into the rear communication part of the adapter tube to press the rear end of the adapter tube in a circumferential direction while being in axial communication with the communication part of the cylinder and the adapter tube; A recess groove formed in an inner diameter portion of the cylinder in a circumferential direction and having a U-shaped cross section; A plurality of protruding pieces which are formed at the rear of the outer diameter portion of the adapter tube and are fitted into the recess groove in a state where the adapter tube is circumferentially pressed toward the cylinder as the fitting tube is fitted to the adapter tube; It is formed in an inclined state to one side along the axial direction at the front end of the push rod and when the push rod is moved forward, the eccentric to the injection liquid discharge pipe while contacting the injection liquid discharge pipe formed in the outer tube through the communication portion of the fitting tube A pressing piece providing pressure; A first catching protrusion formed at a first catching jaw formed at a rear inner diameter portion of the fitting tube and a side portion of the pressing piece, and having an elastic force to overcome the first catching jaw when the push rod is moved forward; The second catching jaw formed in the rear inner diameter portion of the adapter tube and the front outer diameter portion of the fitting tube fitted to the adapter tube and is caught by the first locking projection when the fitting tube escapes from the adapter tube by the rearward movement of the push rod A second locking projection for dragging the tube into the cylinder; The communication part is formed inside the spiral insertion tube in a state where the injection liquid discharge tube of the adapter tube is formed through the communication portion of the spiral insertion tube and is formed in the outer diameter portion of the injection liquid discharge tube formed in the adapter tube in the circumferential direction. A circumferential protrusion to hook the spiral insertion tube together when the adapter tube is dragged into the cylinder; It is formed on the push rod and characterized in that it is composed of a cutting groove to easily cut the push rod when pressing the push rod in a direction perpendicular to the axial direction.

The present invention characterized by the above configuration, the spiral insertion tube is formed in the inner diameter spiral insertion pipe is made separately from the cylinder and inserted into the coupling tube forming portion in the cylinder, the needle is fixed for injection If the needle holder tube is inserted into the injection liquid discharge tube of the adapter tube and the coupling is not completed, even if the flange formed on the needle holder tube does not completely cross the spiral projection of the spiral insertion tube, When the push rod is pulled to the rear of the outer tube after the injection is completed, the needle holding tube moves smoothly to the rear with the spiral insertion tube and the outer tube to enter the cylinder, thereby improving safety.

In addition, since the gasket ring having a cushioning force is coupled to the outer diameter of the outer tube in which the injection liquid discharge tube is integrally formed, the gasket ring is hermetically contacted with the cylinder while the syringe is assembled, so that the outer tube and the cylinder are completely sealed. Accordingly, there is an effect that the injection solution does not leak between the adapter tube and the cylinder during the injection process.

In the assembled state, a plurality of protruding pieces formed at the rear end of the pusher tube are caught in the U-shaped recessed groove formed in the inner diameter of the cylinder by the pressing force in the circumferential direction due to the fitting pipe fitted to the adapter tube. The force is made perfectly, and therefore, the adapter tube is never pushed toward the rear push rod when the needle holder tube is fixed to the injection liquid discharge tube formed in the adapter tube for use. Not only is the condition always maintained, but also the safety of the use process is further improved.

1 is an exploded perspective view showing a disposable syringe commonly used

2 and 3 are longitudinal cross-sectional view showing a state of use of a disposable syringe that is commonly used

Figure 4 is an exploded perspective view showing a disposable safety syringe according to a conventional embodiment

5 to 9 is a longitudinal cross-sectional view showing a state of use of the disposable safety syringe according to the conventional embodiment

Figure 10 is an enlarged longitudinal sectional view showing the main portion of the disposable safety syringe according to another embodiment

11 is an exploded perspective view showing the present invention disposable safety syringe

12 to 17 is a longitudinal cross-sectional view showing a state of use of the disposable safety syringe of the present invention

* Figure 18 is an exploded perspective view showing an enlarged main portion of the disposable safety syringe of the present invention

19 to 21 is an enlarged cross-sectional view of the main portion for explaining the assembly process of the disposable safety syringe of the present invention

201. Cylinder 201a. Horizontal groove

201b. Concave groove 202. Combined pipe

202a. Stopper 203. Pushpin

204. Piston 205. Threaded insertion tube

205a. Horizontal projection 205b. Spiral projection

206. Adapter tube 206a. Second catch jaw

206b. Protruding piece 207. Gasket ring

208. Injection liquid discharge tube 208a. Circumference

209. Fitting tube 209a. First jaw

209b. Second Jammer 210. Needle

211. Needle clamp tube 111a. flange

213. Cutting groove 214. Pressing piece

214a. First jamming protrusion

Hereinafter, a preferred embodiment of the present invention will be described in more detail with reference to FIGS. 11 to 21.

Attached Figure 11 is an exploded perspective view showing a disposable safety syringe of the present invention, Figures 12 to 16 is a longitudinal cross-sectional view for explaining the use state of the disposable safety syringe of the present invention, Figure 18 is an enlarged main configuration of the disposable safety syringe of the present invention 19 to 21 is an enlarged cross-sectional view showing main parts for explaining the assembly process of the disposable safety syringe of the present invention. The present invention has a space portion therein in a state in which one front and the other end are in communication with each other. In front of the inlet is provided with a cylinder 201 integrally formed in the stepped state of the coupling pipe 202, the space in the cylinder is a push rod 203 to be moved forward and backward along the longitudinal direction of the cylinder 201 ) Is inserted into the front of the push rod, while the front and back of the push rod 203 moves together in the airtight contact state with the cylinder 201 to provide a compressive force or to remove the suction force Piston 204 is installed so that the spiral insertion tube 205 of the axial direction is inserted into the coupling tube 202 forming part of the space portion in the cylinder 201, the cylinder 201 The outer tube 206 of the axially connected form is inserted into the pusher 203 which is the rear side of the spiral insertion tube 205 among the space portions, and the rear of the spiral insertion tube 205 is inserted into the outer diameter of the outer tube. A gasket ring 207 made of a cushioning material is fitted to keep the airtight tube 206 and the cylinder 201 in an airtight state in the state of being placed in the airtight state. The injection liquid discharge pipe 208 is formed to protrude in communication with the adapter tube 106 in a state having a diameter smaller than the diameter of the adapter tube.

In addition, a fitting tube 209 connected in the axial direction is fitted to the pusher 203, which is the rear side of the adapter tube 206, to press the adapter tube 206 in the circumferential direction, and to the adapter tube 206. The injection needle discharge pipe 208 is coupled to the needle fixed tube 211 is inserted into a state in which the needle 210 is fixed, the needle protection tube to protect the needle needle to protect the needle 210 in a wrapped state 212 is detachably coupled, and a cutting groove 213 is formed at a portion of the rod 203 close to the piston 204 so that the rod 203 is easily cut when the rod 203 is bent in a disposal process after use.

At the front end of the pusher 203, the pressing piece 214 is formed in an inclined state to one side along the axial direction, and when the pusher 203 is pushed forward to move the tip of the pressing piece 214 The injection liquid discharge pipe receives the eccentric pressing force of the press piece 214 as it passes through the communication portion of the fitting pipe 209 and contacts the inner diameter portion of the injection liquid discharge pipe 208 formed in the adapter tube 206.

A first catching jaw 209a is formed in the inner diameter portion of the fitting tube 209 along a circumference, and a first catching protrusion 214a having an elastic force is formed in the outer diameter portion of the pressing piece 214 after completion of the injection. Insertion tube inserted in the adapter tube 206 while the first catching projection 214a is caught by the first catching jaw 209a when the pusher 203, which has been moved forward for disposal of the syringe, is moved to the rear again. As the 209 is moved backwards together, the circumferential pressing force of the adapter tube 206 by the fitting tube is released.

In addition, a second catching jaw 206a is formed in the inner diameter portion of the adapter tube 206 along the circumference, and a second catching protrusion 209b is formed in the outer diameter portion of the fitting tube 209 after the injection is completed. When the fitting tube 209 moves together by the continuous rearward movement of the pusher 203, the second catching protrusion 209b is caught by the second catching jaw 206a to move the adapter tube 206 backward together. .

A plurality of horizontal grooves 201a are formed around the inner diameter of the coupling tube 202 forming part of the cylinder 201 along the axial direction, and a plurality of horizontal grooves along the axial direction around the outer diameter of the spiral insertion tube 205. The horizontal protrusion 205a is fitted into the horizontal groove 201a in a state where the protrusion 205a is formed and the spiral insertion pipe 205 is inserted into the inner diameter portion of the coupling pipe 202 forming portion of the cylinder 201. Accordingly, even after the circumferential rotational force is applied to the spiral insertion tube 205, the spiral insertion tube does not actually rotate.

On the other hand, the inner periphery of the cylinder 201 is formed around the inner circumferential direction of the recess groove 201b having a U-shaped cross section, the outer tube of the outer tube 206 of the outer tube around the outer tube ( A plurality of protruding pieces 206b are formed to face the concave groove 201b when inserted into the space portion in the 201, and the fitting tube is inserted into the cylinder by fitting the fitting tube 209 into the inner diameter of the adapter tube 206. When pressed in the circumferential direction toward the 201 side, the end portions of the protruding pieces 206b are received by the concave grooves 201b so that the outer tube 205 is caught in the cylinder 201.

In addition, in the outer diameter portion of the injection liquid discharge pipe 208 formed in the adapter tube 206, a circumferential protrusion 208a protrudes along the circumferential direction, so that the adapter tube 206 is inserted into the space in the cylinder 201, so that the adapter tube In the state where the injection liquid discharge pipe 208 formed in the 206 is fitted through the communication portion of the spiral insertion tube 205, the circumferential protrusion 208a is caught in the communication portion inside the spiral insertion tube 205, and then after the injection is completed. As the push rod 203 is moved backward during the disposal of the syringe, the spiral insertion tube 205 moves together when the fitting tube 209 and the adapter tube 206 move.

In addition, a stopper 202a is formed at an inner diameter portion of the front end of the coupling pipe 202 formed in the cylinder 201 so as to face inwardly, and the spiral insertion pipe is formed as a coupling pipe 202 forming part of the space in the cylinder 201. Since the front end of the spiral insertion tube is caught by the stopper 202a in the inserted state, the spiral insertion tube 205 exits to the outside in any case during the assembly and use of the syringe 205. Do not work.

In the present invention described above, the injection liquid discharge pipe 208 formed at the front end of the adapter tube 206 is fitted with a needle fixing tube 211 to which the needle 210 is fixed, as described above, for the injection. A substantially elliptical flange 211a is formed at the rear end of the outer periphery of the needle fixing tube, and a spiral protrusion 205b is formed in a spiral shape at an inner diameter of the spiral insertion tube 205 inserted into the cylinder 201. When the needle fixing tube 211 is rotated while being inserted into the injection liquid discharge tube 208, the flange 211a of the needle fixing tube 211 is screwed into the spiral protrusion 205b of the spiral insertion tube 205.

Prior to explaining the use process of the present invention disposable safety syringe configured as described above will briefly describe the assembly process.

Insert the spiral insertion tube 205 through the inner diameter of the opposite end of the coupling tube 202, which is the rear of the cylinder 201, so that the spiral insertion tube is coupled to the coupling tube 202 forming portion of the cylinder 201, and then Insert an adapter tube 206 into which a gasket ring 207 is fitted to the neck portion so that the adapter tube is coupled to the spiral insertion tube 205, and then inserts the tube 209 into the inner diameter of the cylinder 201. Insert the fitting tube to be coupled to the adapter tube 206, the injection tube 206 is inserted into the inner diameter portion of the cylinder 201 is coupled to the injection liquid discharge tube 208 formed in the adapter tube 206 The spiral insertion tube 205 passes through the communication portion and is positioned inside the spiral insertion tube.

When the spiral insertion tube 205 is inserted into the cylinder 201 in the above-described process, a plurality of horizontal protrusions 205a formed around the outer diameter of the spiral insertion tube 205 along the axial direction are formed in the cylinder 201. The coupling tube 202 is formed in each of the plurality of horizontal grooves 201a formed along the axial direction around the inner diameter portion, which is injected into the injection liquid discharge tube 208 formed in the outer tube 206 for use of a syringe after assembly. When the needle 210 engages the fixed needle fixing tube 211, the flange 211a formed on the needle fixing tube 211 is formed along the spiral protrusion 205b formed on the inner diameter of the spiral insertion tube 205. In order to prevent the spiral insertion tube 205 from being rotated together due to the rotational force even though it has a tightening torque, the front end of the spiral insertion tube 205 is a coupling tube 202 formed in the cylinder 201. Inwardly around the inner diameter of the tip The spiral insertion tube 205 is hung on the stopper 202a which is formed in the spiral insertion tube 205 even when the moving force is applied to the spiral insertion tube 205 in the assembling process as well as during the use of the syringe after assembly. There is absolutely no escape to the outside, ensuring safety.

In addition, the outer diameter portion of the gasket ring 207 in the state in which the gasket ring 207 is inserted into the space portion in the cylinder 201 is inserted into the spiral insertion tube 205 in the above-described process, the cylinder 201 Since the fitting tube 209 is coupled to the adapter tube 206 in a subsequent process, the rear portion of the adapter tube 206 is circumferentially toward the cylinder 201 due to the fitting tube 209. The gasket ring 207 is compressed and strongly contacted with the inner diameter portion of the cylinder 201 as it is opened with a pressing force in the direction. In this case, the gasket ring 207 is connected between the cylinder and the adapter tube 206. In the process of using the syringe after the assembly is completed by maintaining the airtight state, the injection liquid is not leaked to the outside through the cylinder 201 and the adapter tube 206.

After inserting and inserting the spiral insertion tube 205 into the space portion in the cylinder 201 in the above-described process, when the adapter tube 206 is continuously inserted, the injection liquid discharge tube 208 formed in the adapter tube is the spiral insertion tube. 205 is inserted into the communication portion, wherein the circumferential protrusion 208a formed in the outer diameter portion of the injection liquid discharge pipe 208 in the circumferential direction is one of the communication portions of the spiral insertion pipe 205 due to the elastic force of the material itself. Since it is located inside the spiral insertion tube to overcome the locking force of the rear and is caught in the front of the communication portion, the fitting tube 209 and the adapter tube as the pusher 203 is moved backward in the disposal process after the use of the syringe afterwards. When the 206 is moved together, the spiral insertion pipe 205 is moved together by the circumferential protrusion 208a.

And in the state in which the fitting pipe 209 inserted through the inner diameter of the cylinder 201 is fitted in the rear of the adapter tube 206 in the above-described process, the rear end of the adapter tube is fitted as described above As it is pressed in the circumferential direction by 209, each protruding piece 206b formed in the outer tube 206 is fitted into the recessed groove 201b formed in the circumferential direction in the space in the cylinder 201. After the assembly of the syringe, the needle fixing tube 211, to which the needle 210 is fixed for injection, is inserted into the injection liquid discharge tube 208 formed in the adapter tube 206, or coupled to the needle fixing tube 211. In the process of actually performing the injection after completion is to prevent the adapter tube 206 is not pushed toward the rear push rod 203.

Then, the fitting pipe 209 is described in detail the process of being coupled to the rear of the adapter tube 206 as follows.

19 is a step before fitting the fitting tube 209 to the adapter tube 206, wherein each of the protrusion pieces 206b formed at the rear circumference of the outer diameter portion of the adapter tube 206 is a cylinder ( The protrusion pieces 206b are not fitted into the recessed grooves 201b, but face each other in a spaced apart state from the recessed grooves 201b formed in the space portion 201. When the negatively inserted fitting tube 209 is pushed toward the front outer tube 206, the second catching protrusion 209b formed around the front of the outer diameter portion of the fitting tube 209 as shown in FIG. Overcame the interference force of the second catching jaw 206a formed around the inner circumferential portion of the outer tube 206, and closes to the second catching jaw 206a, and then the fitting pipe 209 is continued. If it pushes further toward the outer tube 206, the moving part is caught as shown in FIG. Since the tube 209 presses the second catching jaw 206a forming portion of the rear tube 206 in the circumferential direction toward the cylinder 201, each protruding piece 206 b formed in the outer tube 206. ) Is fitted into the recessed groove 201b formed in the inner diameter portion of the cylinder 201.

21, the outer diameter portion of the outer tube 206 is formed in the state where the protrusion pieces 206b formed in the outer tube 206 are fitted into the concave groove 201b formed in the inner diameter portion of the cylinder 201 as shown in FIG. The gasket ring 207 fitted to the cylinder is strongly compressed in the circumferential direction toward the cylinder 201, so that the sealing force by the gasket ring 207 is sufficiently provided as well as the rear of the adapter tube 206. There is also a sufficient repulsion force to restore the wealth back to its original state.

Through the above process, the spiral insertion pipe 205 is inserted into the inner diameter portion of the cylinder 201, and the outer tube 206 having the injection liquid discharge pipe 208 formed therein is coupled to the spiral insertion pipe 205. After the fitting pipe 209 is fitted to the rear of the adapter tube 206 and coupled, the piston 204 is installed and the push rod 203 having the cutting groove 213 is formed in the cylinder 201. The needle fixing tube 211 is inserted into the inner diameter portion from the front outer side of the cylinder 201 by inserting the needle fixing tube 211 in which the needle 210 is fixed. The screw is inserted into the insertion tube 205, but in this case, the injection liquid discharge tube 208 formed in the adapter tube 206 is inserted into the needle fixing tube 211, so that the needle fixing tube 211 is the injection liquid discharge tube 208. ) Will be wrapped.

By continuing to combine the needle protection cap 212 to the needle fixing tube 211 to ensure that the needle protection cap is wrapped in the needle 210 to complete the assembly of the present invention disposable safety syringe, The process of coupling the needle fixing tube 211 to which the needle 210 is fixed to the spiral insertion tube 205 and the process of coupling the needle protection cap 212 to the needle fixing tube 211 are provided in the present invention. Although it may be carried out when assembling the disposable safety syringe for the first time, it is not necessarily limited thereto and may be performed at a stage immediately before the user uses the disposable safety syringe of the present invention.

When the needle fixing tube is coupled to the spiral insertion tube 205 so that the injection liquid discharge tube 208 formed in the adapter tube 206 is fitted into the needle fixing tube 211, the needle fixing tube 211 may be rotated. At this time, a substantially elliptical flange 211a formed at the rear end of the outer circumferential surface of the needle fixing tube is screwed along the spiral protrusion 205b formed on the spiral insertion tube 205.

Although the assembly of the present invention disposable safety syringe described above may be artificially made by a person, it is understood that most of the assembly is automatically performed by a mechanical device.

Referring to the use process of the present invention disposable safety syringes configured as described above is as follows, for the use of the present invention disposable safety syringes first the needle protecting cap 212 that protects the needle 210 cylinder in front Pulling away from the 201, the needle protection cap 212 is to be separated in advance from the needle fixing tube 211, and must go through a pre-process to release the protective state of the needle 210.

12 is a longitudinal sectional view showing the disposable safety syringe of the present invention, in which the piston is moved backward with the push rod before the injection, in this state the piston installed in the space load rod 203 in the cylinder 201 ( 204), the injection liquid is sucked and filled in the left part of the drawing, and the procedure for allowing the injection liquid to be sucked and filled into the space part of the cylinder 201 can be sufficiently understood by referring to the procedure of a general disposable syringe described above. It will be omitted.

In the state as shown in FIG. 12, the user grasps the cylinder 201 by hand and moves toward the patient so that the needle 210 fixed to the needle fixing tube 211 is inserted into the patient's skin and then pushes 203. When the piston 204 is moved forward with the pusher 203 forward by pushing the needle toward the needle fixing tube 211 which is forward, compression force is provided on the left side of the drawing based on the piston 204 of the space in the cylinder 201. Accordingly, the injection liquid filled into the space portion in the cylinder 201 receives a compressive force. In this case, the gasket ring 207 is inserted into the space portion of the cylinder 201 and the gasket ring 207 is inserted into the outer diameter portion. Since the fitting tube 209 is fitted and coupled as described above, the adapter tube 206 is subjected to the circumferential pressing force toward the cylinder 201 and thus the adapter tube 206 and the cylinder. The injection liquid exiting the cylinder 201 is kept in an airtight state between the 201s and is smoothly discharged through the injection liquid discharge pipe 208 formed in the outer tube 206 without leaking to the outside. The discharged injection solution is continuously administered into the patient's skin through the needle 210 fixed to the needle fixing tube 211, and the injection of the injection solution is completed in the state where the pusher 203 is forward. It is shown well in FIG. 13 as it is completely moved toward the needle clamp tube 211.

13 is a state in which the injection is completed, in this case, the rod 203 is moved toward the outer tube 206 which is completely forward, so that the fitting tube 209 is strongly adhered to the outer tube 206. It is understood that the first catching projection 214a of the pressing piece 214 formed on the 203 overcomes the catching force of the first catching jaw 209a formed on the fitting pipe 209 and is caught on the first catching jaw. It is possible.

As described above, the state in which the injection solution is administered to the patient is a state in which the push rod 203 is completely moved forward as described above, and at this time, the center of the front end of the push rod 203 is attached as shown in FIG. 13. The pressure piece 214 protruding is inserted into the inner diameter portion of the injection liquid discharge pipe 208 formed in the adapter tube 206 through the communication portion of the fitting pipe 209, so that the pressure piece 214 is the injection liquid discharge pipe 208. The pressing piece 214 is inclined to one side along the axial direction in a state in which the pressing piece 214 is inserted into the inner diameter portion of the injection liquid discharge pipe 208 and is in contact with each other. Considering the state, the injection liquid discharge pipe 208 has the force to be tilted to one side under the eccentric pressing force of the pressing piece 214, it is understood that the actual state is not inclined. It is possible.

In the state as shown in FIG. 13, the user moves the cylinder 201 to the opposite side of the patient to remove the needle 210 inserted into the skin of the patient and simultaneously pushes the push rod 203 that is moved forward to the rear. When pulled to move in the opposite direction, the pressing piece 214 formed in the pusher 203 also moves backward, wherein the first catching protrusion is formed at the outer diameter portion of the pressing piece 214. The first moving jaw of the pusher 203 is formed on the pressing piece 214 as 214a is caught by the first catching jaw 209a formed along the circumference of the fitting tube 209. Since the fitting protrusion 214a is eccentrically transmitted to the fitting tube 209, the fitting tube is partially exited from the adapter tube 206 to the rear as shown in FIG. 14, and in this case, the adapter tube 209 is attached to the adapter tube. The circumferential pressing force transmitted to the pipe 206 Since the protruding pieces 206b formed on the outer tube 206 are received together with the restoring force of the material itself and the restoring force of the gasket ring 207 in the compressed state, the yaw formed in the inner diameter portion of the cylinder 201. The airtightness between the adapter tube 206 and the cylinder 201 due to the rapid release of the gasket ring 207 fitted into the outer diameter of the adapter tube 206 is released as well as being quickly released from the mouth groove 201b. Is released.

Since the pusher 203 is further pulled and moved further to the rear, the presser piece 214 formed on the pusher also moves to the opposite side of the needle fixing tube 211 which is rearward as described above. The fitting tube 209 is further moved to the rear by the second tube, and the second catching protrusion 209b formed at the outer diameter portion of the fitting tube 209 at any moment when the fitting tube is further moved to the rear tube 206 is formed. Since the second catching jaw 206a is formed in the inner diameter portion of the fitting tube 209 is a moving state to pull the adapter tube 206 to the rear from this time, in this case is formed in the adapter tube The injection liquid discharge pipe 208 is inserted forward through the communication portion of the spiral insertion pipe 205, as well as the circumferential protrusion 208a formed around the outer diameter of the injection liquid discharge pipe 208 inside the spiral insertion pipe 205. In the communication section It is completely located in the recess in the cylinder 201 as shown in Figure 15 to eventually move backward is also fitted gojeonggwan injection needle 211 and the helical insert tube 205, which coupled to the injection liquid outlet tube 208.

On the other hand, as shown in Fig. 15, the outer tube 206, in which the injection liquid discharge tube 208 is formed, the needle fixing tube 211 and the spiral insertion tube 205 in which the injection needle 210 is fixed, are simultaneously in the cylinder 201. In the state of being fully entered into the space portion, each of the protrusion pieces 206b formed at the rear of the adapter tube 206, the gasket ring 207 fitted to the outer diameter of the adapter tube 206, and the spiral insertion tube 205 Since all of the cylinder 201 is kept slightly away from the adapter tube 206 is reliably inclined by the eccentric pressing force of the pressing piece 214 formed on the push rod 203, when the adapter tube is inclined Since the spiral insertion tube 205 as well as the needle fixing tube 211 to which the needle 210 is fixed are inclined, the adapter tube 206 and the spiral insertion tube 205 and the needle fixing tube 211 are in the longitudinal direction thereof. The central axis can hold the cylinder 201 Given the state is maintained for an oblique inclination.

Thereafter, the cutting groove 213 formed in the pusher 203 is positioned in a state close to the rear outer side of the cylinder 201, and then repeatedly presses the rear of the pusher 203 in the direction perpendicular to the longitudinal direction. When the cutting groove 213 of the push rod 203 is broken by the pressing force, it is cut as shown in FIG. 16. After the push rod 203 is cut, the push rod 203 outside the cylinder 201 is cut. Position the cutting part side by side in front of the cylinder to face the cylinder 201, and then insert a substantial portion into the space in the cylinder 201 through the coupling pipe 202 as shown in Figure 17 of the cylinder 201 Since the inner diameter portion of the coupling tube 202 forming the front portion is closed, the needle 210 of the needle fixing tube 211, which has entered the space portion of the cylinder 201 during the disposal of the syringe after use, falls out of the cylinder 201. I did not come out .

Therefore, the needle 210 does not escape to the outside from the inside of the cylinder 201 in any case, the user is not stuck to the needle 210 in the process of discarding the syringe after use, as well as processing the discarded syringe The worker who handles the waste in the process is not stuck to the needle 210 will not cause a safety accident.

While the invention has been shown and described in connection with specific embodiments, it is not necessarily limited thereto, and various modifications and changes can be made without departing from the spirit or the scope of the invention provided by the claims, This should also be included within the scope of the present invention.

Claims

A cylinder having a space therein and having a stepped coupling tube integrally formed at a front end thereof in a state in which one front end and the other end rear side are in communication with each other;

A push rod coupled to the cylinder to be able to provide a compressive force or a suction force in an airtight contact with the cylinder and movably fitted in a space in the cylinder;

The spiral insertion tube is inserted in a state in which the circumferential rotation is impossible in the circumferential direction in the front of the coupling portion forming part of the space in the cylinder, and is axially communicable with the space in the cylinder, and has a spiral protrusion formed on the inner diameter thereof in a spiral shape. ;

An adapter tube which is inserted between the push rod and the spiral insertion tube among the space portions in the cylinder and is integrally formed with the space in the cylinder so as to be inserted through the communication portion of the spiral insertion tube and is integrally formed with the injection tube;

An injection needle fixing tube which is inserted into the injection liquid discharge tube of the adapter tube when the elliptical flange formed integrally at the end of the injection liquid discharge tube coupling portion at the rear of the injection needle is fixed to the spiral protrusion of the spiral insertion tube when the needle is fixed;

A gasket ring fitted to an outer diameter portion of the adapter tube and preventing the injection liquid from leaking between the cylinder and the adapter tube while being in airtight contact with the cylinder when a pressing force is provided in the circumferential direction while the adapter tube is inserted into a space in the cylinder;

A fitting tube inserted into the space communicating part of the cylinder and inserted into the rear communication part of the adapter tube to press the rear end of the adapter tube in a circumferential direction while being in axial communication with the communication part of the cylinder and the adapter tube;

A recess groove formed in an inner diameter portion of the cylinder in a circumferential direction and having a U-shaped cross section;

A plurality of protruding pieces which are formed at the rear of the outer diameter portion of the adapter tube and are fitted into the recess groove in a state where the adapter tube is circumferentially pressed toward the cylinder as the fitting tube is fitted to the adapter tube;

It is formed in an inclined state to one side along the axial direction at the front end of the push rod and when the push rod is moved forward, the eccentric to the injection liquid discharge pipe while contacting the injection liquid discharge pipe formed in the outer tube through the communication portion of the fitting tube A pressing piece providing pressure;

A first catching protrusion formed at a first catching jaw formed at a rear inner diameter portion of the fitting tube and a side portion of the pressing piece, and having an elastic force to overcome the first catching jaw when the push rod is moved forward;

The second catching jaw formed in the rear inner diameter portion of the adapter tube and the front outer diameter portion of the fitting tube fitted to the adapter tube and is caught by the first locking projection when the fitting tube escapes from the adapter tube by the rearward movement of the push rod A second locking projection for dragging the tube into the cylinder;

The communication part is formed inside the spiral insertion tube in a state where the injection liquid discharge tube of the adapter tube is formed through the communication portion of the spiral insertion tube and is formed in the outer diameter portion of the injection liquid discharge tube formed in the adapter tube in the circumferential direction. A circumferential protrusion to hook the spiral insertion tube together when the adapter tube is dragged into the cylinder;

Disposable safety syringe, characterized in that formed on the push rod and consisting of a cutting groove for easily cutting the push rod when pressing the push rod in a direction perpendicular to the axial direction.
The method of claim 1,

A plurality of horizontal grooves are formed around the inner diameter of the coupling tube forming portion of the cylinder along the axial direction, and a plurality of horizontal protrusions are formed around the outer diameter of the spiral insertion tube along the axial direction so that the spiral insertion tube is the coupling tube of the cylinder. Disposable safety syringe, characterized in that the spiral insertion tube is not rotated in the circumferential direction as the horizontal projection is inserted into the horizontal groove in the state formed into the inner portion formed.
The method of claim 1,

A stopper is formed at an inner diameter portion of the end portion of the coupling tube formed in the cylinder so as to face inwardly, and the rear end portion of the spiral insertion tube interferes with the stopper when the spiral insertion tube is inserted into the coupling tube forming portion of the space in the cylinder. Disposable safety syringe, characterized in that to catch.