KR20200069539A - Safety syringe - Google Patents

Abstract

The present invention relates to a safety syringe having a double chamber so as to allow an injection solution and an injection agent to be stored in a separated state, and capable of preventing the occurrence of an accident due to a syringe needle after injection. The safety syringe according to the present invention comprises: a cylinder having an internal space into which an injection agent is injected, and having a discharge hole which is formed at the tip thereof to allow the injection agent to be discharged therethrough; a pressurizing part including a pressurizing packing which is inserted into the cylinder to pressurize the injection agent filled in the cylinder toward the discharge hole, and including an extension rod which extends from the pressurizing packing to the outside of the cylinder; a syringe needle inserted into a patient′s skin to inject the injection agent discharged through the discharge hole into the patient′s skin; and a head unit installed at the tip of the cylinder to support the syringe needle. The head unit comprises: an external fastening member fixedly installed on the outside of the cylinder; a first withdrawal member inserted into the cylinder to prevent separation to the outside of the cylinder by the external fastening member, and connected to the pressurizing part after injection of the injection agent; and a second withdrawal member fastened to the first withdrawal member, allowing the syringe needle to be connected thereto, and including an inlet blocking part capable of being hung on or released from the external fastening member so as to allow or block entry into the cylinder.

Description

Double compartment pre-filled safety syringe {SAFETY SYRINGE}

The present invention relates to a safety syringe, and more specifically, a double-chamber pre-filled safety syringe capable of preventing accidents caused by an injection needle after injection and having a double chamber so that the injection solution and the injection agent can be stored in separate states. It is about.

In general, a syringe is used to inject an injection solution into a patient's body or to collect blood or body fluid from a patient's blood vessel, and a cylinder in which the injection solution or the collected blood or body fluid can be accommodated and a patient provided in front of the cylinder It consists of an injection needle inserted into the body of the body, a packing member that can be moved within the cylinder to inject injection fluid or to inject blood or body fluid into the cylinder, and a packing rod that extends outside the cylinder to move the packing member. .

On the other hand, when the injection solution is injected into the body through a syringe, in order to transfer the drug contained in the glass ampoule or the inside of the vial with a rubber stopper into the syringe, the upper portion of the glass ampoule is cut and the injection needle is cut through the cut. The drug is injected and inhaled.

The injection needle of the syringe used in this way is disposed of after the protective cap is put on, and after the use of the syringe, in the process of putting on the protective cap, or during handling, a doctor or nurse is often stabbed in the needle, and also the syringe Even in the process of disposal, the protective cap on the needle is removed, and the disposal agent is also stabbed in the needle.

There was a problem in which the infectious pathogen of a patient was transmitted by a doctor, nurse, or waste treatment agent being stabbed in the used needle.

Due to these safety issues, various safety syringes have been developed.

However, since conventional safety syringes are structurally complicated or inconvenient to use, they are poorly used in hospitals and clinics, and thus, it is necessary to develop a safety syringe that is excellent in convenience and can be safely handled.

Korean Patent Publication No. 10-2016-0144117: Safety Syringe Korean Registered Patent No. 10-1763425: Universal safety syringe

The present invention was created to solve the above problems, and the injection of this species is filled to quickly and simply mix and inject the injection of this species, and the injection needle used after the injection is completed is inserted into the cylinder. There is an advantage in that the operator can prevent an accident of being stuck in an injection needle during handling or disposal after injection.

The double-compartment pre-filled safety syringe according to the present invention has an inner space in which an injection agent is injected, and a cylinder in which a discharge hole is formed so that the injection agent is discharged at the tip, and is inserted into the cylinder and filled in the cylinder. Pressurizing portion including a pressure packing that can pressurize the injected agent toward the discharge hole and an extension rod extending from the pressure packing to the outside of the cylinder, and to inject the injection agent discharged through the discharge hole into the patient's skin It includes an injection needle to be inserted, and a head unit installed at the front end of the cylinder to support the injection needle, wherein the head unit is fixed to the outside of the cylinder and an external fastening member, and is inserted inside the cylinder to Departing from the outside of the cylinder is blocked by an external fastening member, and after injection of the injection agent, the first withdrawal member connected to the pressurization part is fastened to the first withdrawal member, and the injection needle is connected to the cylinder. It includes a second withdrawal member including an inlet blocking portion that can be caught or released from the external fastening member to allow or block entry into the interior.

The outer fastening member is formed with a hollow having an inner diameter corresponding to the outer diameter of the leading end of the cylinder, and a lower end is formed with a hooking portion that engages a locking jaw formed to protrude outward at the leading end of the cylinder, and the first drawing member is the A cylindrical member having an outer diameter corresponding to the inner diameter of the cylinder is formed with a through hole through which a withdrawal hook member extending from the pressurized packing can pass, and inserted into a blocking groove formed inside the upper surface of the outer fastening member at the upper end. The anti-rotation protrusion for blocking the first withdrawal member from rotating with respect to the external fastening member is formed to protrude a predetermined length upward at a predetermined interval along the circumferential direction, and passes through the through hole to the second withdrawal member. It is preferable that a hook groove into which the withdrawal hook member is inserted and coupled is formed.

The withdrawal blocking portion formed on the second withdrawal member protrudes a predetermined length outward from the outer circumferential surface of the second withdrawal member, and the outer fastening member has a through hole so that the second withdrawing member protrudes toward the front of the cylinder on the upper surface. This is formed, the through-hole is formed on one side of the through-hole is allowed to pass through the inlet blocking portion is allowed to move into the interior of the external fastening member, the rest of the area except for the through-hole is blocking the inlet The inner diameter may be formed to correspond to the outer diameter of the second drawing member so that no additional passage can be made.

An entry blocking portion is formed at a position spaced apart from the through allowable groove to block the second withdrawal member from entering the inside of the cylinder by the intake blocking portion, and the corresponding location is located at both edges of the through allowable groove and the entry blocking portion. Departure prevention protrusions are provided to prevent the ingress blocking portion entering into the passage allowable groove or the entry blocking portion, and the protrusion preventing protrusion gradually decreases as the distance from the edge of the passage permitting groove and the entry blocking portion increases. It is preferably formed obliquely.

A communication opening of a movement passage through which the injection agent filled in the cylinder moves to the injection needle is formed at a lower portion of the second withdrawal member, and when the intake blocking portion is located in the entry blocking portion, the communication opening is opened. When the inlet blocking portion is located in the passage allowable groove, it is preferable that the communication port is formed to be closed.

The extension rod corresponds to the rear end of the cylinder when the first and second withdrawal members of the injection needle and the head unit enter the interior of the cylinder and the injection needle is not exposed to the outside. It is preferable to form a cutting guide part that can be cut at a position.

The withdrawal hook member is formed in a truncated cone shape in which the outer diameter becomes narrower as the front end portion extends forward, and the hook groove is elastically deformable to allow the withdrawal hook member to enter the interior, and the withdrawal hook member is It is preferable that the diameter is formed to be relatively smaller than the diameter of the lower end of the withdrawal hook member so as to block the withdrawal hook member from being pulled out while entering the inside.

Is provided in the interior of the cylinder is further provided with a divided packing for dividing the inner space of the cylinder into a front part space and a rear part space, wherein the divided packing has a communication hole through which the injection agent can pass in the center, It is formed of a material that can be elastically deformed, and an inner protrusion section is formed on the inner circumferential surface of the cylinder to induce compression of the divided packing so that the communication hole can be closed when the divided packing enters the rear portion. When the divided packing enters the front part space beyond the inner protrusion section, the communication hole may be formed to be opened.

The double-compartment pre-filled safety syringe according to the present invention not only prevents the reuse of the injection needle, but also prevents the accidental occurrence of an infection by the operator being stabbed in the injection needle after handling or disposal of the syringe.

1 is a perspective view of an embodiment of a double compartment prefilling safety syringe according to the present invention,
Figure 2 is a cross-sectional view of the safety syringe of Figure 1,
Figure 3 is a cross-sectional view of a state in which the divided packing is coupled to the interior of the cylinder,
Figure 4 is an excerpt perspective view showing the head unit of the safety syringe of Figure 1,
5 and 6 is an exploded perspective view of the head unit of Figure 4,
7 is a cross-sectional view of the head unit,
8 is a perspective view showing a pressure blocking member,
9 is a view showing a safety syringe in which the head unit enters the interior of the cylinder and the connecting rod is cut and ready for disposal.

Hereinafter, a double-compartment pre-filling safety syringe according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The present invention can be applied to various changes and may have various forms, and specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosure form, and it should be understood as including all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing each drawing, similar reference numerals are used for similar components. In the accompanying drawings, the dimensions of the structures are shown to be enlarged than the actual for clarity of the present invention.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from other components. For example, the first component may be referred to as a second component without departing from the scope of the present invention, and similarly, the second component may be referred to as a first component.

Terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, terms such as “include” or “have” are intended to indicate the presence of features, numbers, steps, actions, elements, parts or combinations thereof described in the specification, but one or more other features. It should be understood that the presence or addition possibilities of fields or numbers, steps, actions, components, parts or combinations thereof are not excluded in advance.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms such as those defined in a commonly used dictionary should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

Referring to the drawings, a double-compartment pre-filled safety syringe according to the present invention (hereinafter referred to as a'safety syringe') is used by injecting an injection agent into a patient and then injecting the needle 10 into the cylinder 100 after use. It is possible to prevent the operator from being stuck in the injection needle 10 during the handling process.

To this end, the safety syringe 1 of the present invention is provided with a cylinder 100, a pressing portion 200 for pressurizing to discharge the injection agent filled inside the cylinder 100, and a needle provided at the tip of the cylinder 100 It includes a head unit 300 for supporting (10).

The cylinder 100 has a predetermined inner space through which the injection agent can be injected, and a discharge hole 110 through which the injection agent can be discharged is formed at the front end portion, and a pressure packing 210 of the pressing portion 200 is formed at the rear end portion. ) And the extension rod 230 is formed with an entry hole 120 through which entry and exit can be made. In addition, an extended support portion 130 is formed at a rear end portion of the cylinder 100 to be supported by a user by hand during the injection process.

In the case of a conventional syringe, the tip portion of the cylinder 100 is inclined to become narrower as it extends forward, and a cylindrical protrusion having a predetermined diameter is provided so that the injection needle 10 can be fitted directly, but in the case of the present invention, the head unit ( The cylinder 100 does not have a narrow outer diameter and an inner diameter so that the 300) can be fastened directly to the tip of the cylinder 100.

In addition, a locking jaw 140 is formed on the outer circumferential surface of the front end portion of the cylinder 100 to protrude a predetermined length outward. The locking jaw 140 may be an external fastening member 310 of the head unit 300 to be described later. It is formed.

In the case of the present embodiment, a double-chamber type pre-filled syringe capable of pre-filling two injection agents, and a divided packing 150 is further provided inside the cylinder 100.

The divided packing 150 divides the inner space of the cylinder 100 into a front part space and a rear part space. In the rear part space, an inner protruding section 163 protruding inward of the cylinder 100 is formed, so that the rear part is formed. The inner diameter of the subspace is relatively smaller than the inner diameter of the front subspace.

And the split packing 150 is formed of a material that can be elastically deformed, and has a cylindrical shape to be installed inside the cylinder 100. In the center, a communication hole 151 having a predetermined diameter communicating in the front-rear direction is provided. Is formed.

When the partition packing 150 is located in the rear subspace, the inner diameter of the rear subspace is small, so that the communication hole 151 is blocked by being compressed, and when moving to the front subspace, the inner diameter of the front subspace is rearward. Since it expands compared to the inner diameter of the space, the communication hole 151 has a structure that can be opened.

The pressing part 200 is to press the injection agent from the inside of the cylinder 100 into the discharge hole 110 at the distal end of the cylinder 100, and the pressing packing 210 corresponding to the inner space of the cylinder 100, It includes an extension rod 230 extending from the pressure packing 210 to the outside through the rear of the cylinder 100.

When the user presses the end of the extension rod 230, the pressure packing 210 moves from the inside of the cylinder 100 toward the front end portion of the cylinder 100, and the injection agent filled therein is formed at the front end portion of the cylinder 100. It is formed to press the discharge hole 110 side to discharge.

The extension rod 230 is coupled to the head unit 300, which will be described later, and the cylinder 100 in a state where a part of the head unit 300 together with the injection needle 10 is moved to enter the interior of the cylinder 100. ), the cutting guide part 231 is formed to be cut at the rear end position.

In the case of the present embodiment, in the state where the divided packing 150 is located at the front end of the rear subspace, a solid injection may be filled in the anterior space and a liquid injection may be filled in the rear subspace.

When the user presses the pressure packing 210 forward, the split packing 150 moves forward and enters the front space portion 161, and at this time, the communication hole 151 of the split packing 150 is opened.

When the communication hole 151 is opened, the liquid injection agent filled in the rear portion of the divided packing 150 moves to the front space part 161 through the communication hole 151 and is solid in the front space part 161. It is mixed with an injection. At this time, since the space is formed between the solid injections in the front space portion 161, only the liquid injection is moved to the front space portion 161, mixing is performed, and the divided packing 150 is in a stopped state. The injection of the front space portion 161 is also not discharged to the outside.

After all of the liquid injection agent is filled in the empty space of the front space part 161, the injection agent mixed with the solid injection agent passes through the discharge hole 110 according to the pressure of the pressure part 200, and then the injection needle ( 10) is injected into the patient's body. In this process, the liquid injection of the rear space portion 162 is continuously supplied to the front space portion 161 through the communication hole 151 of the divided packing 150 by the pressure of the pressing portion 200, and is pressurized. When the packing 210 comes into contact with the divided packing 150, the injection packing remaining in the front space portion 161 is discharged to the outside through the discharge hole 110 while the pressure packing 210 presses the divided packing 150 forward. Will be discharged.

The head unit 300 is installed in front of the cylinder 100 to support the injection needle 10, the external fastening member 310, and the first withdrawal member 320 inserted into the interior of the cylinder 100 ) And a second withdrawal member 330.

The external fastening member 310 is formed in a cylindrical shape having a hollow having an inner diameter corresponding to the outer diameter of the leading end of the cylinder 100, and the rear end may be engaged with a locking jaw 140 formed outside the cylinder 100. The jaw fixing member 311 is formed. The jaw fixing member 311 is formed in a collet shape and is formed to be elastically deformed at a predetermined angle, and is opened outward when it is fitted from the tip of the cylinder 100 toward the rear portion, and then reaches the locking jaw 140, 100) as it is restored to the inside, it is caught in the locking jaw 140.

The front end portion of the external fastening member 310 is formed with a through hole 312 having a diameter smaller than the inner diameter of the cylinder 100, through which the second withdrawal member 330 is a cylinder 100 It may be withdrawn to the front or enter the interior of the cylinder (100).

In addition, the external fastening member 310 is formed with a passage allowable groove 313 through which the inlet blocking portion 333 of the second withdrawing member 330, which will be described later, can pass. The passage allowable groove 313 is formed on one side of the through hole 312 so that the inlet blocking portion 333 can pass through the external fastening member 310 at a position corresponding to the passage allowable groove 313. The rest of the section except for the passage allowable groove 313 is blocked from moving the inlet blocking portion 333.

An entry blocking portion 314 is formed at a position facing the passage allowable groove 313 to block the second withdrawal member 330 from entering the inside of the cylinder 100, and the passage allowable groove 313 Departure prevention protrusions 315 are provided on both side edges of the and both side edges of the entry blocking portion 314. The departure preventing protrusion 315 is formed to be inclined so that the protrusion height gradually decreases as it extends in a direction away from the passage allowable groove 313 or the entry blocking portion 314, and the entry blocking portion of the second withdrawal member 330 ( When the 333) is located in the passage allowable groove 313 or the entrance blocking portion 314, the inlet blocking portion 333 is prevented from leaving the corresponding location due to an unintended external force, and the user directly enters the second When the holding member 330 is grasped and turned, the inlet blocking portion 333 can rotate beyond the departure preventing protrusion 315.

The first withdrawal member 320 is located inside the distal end of the cylinder 100 and is connected to the second withdrawing member 330, the outer diameter of which is formed in a cylindrical shape corresponding to the inner diameter of the distal end of the cylinder 100, A plurality of anti-rotation protrusions 321 are protrudingly formed at a predetermined interval along the circumferential direction on the front surface of the first drawing member 320.

The anti-rotation protrusion 321 is inserted into the blocking groove 316 formed on the inner surface of the external fastening member 310 to rotate together with the second drawing member 330 when the second drawing member 330 rotates. It has a structure that can be blocked.

A fixed jaw 322 protruding inward is formed on the front portion of the first drawing member 320 so that the second drawing member 330, which will be described later, is not separated from the front. In addition, a through hole 323 is formed in a rear portion of the first withdrawal member 320, and the through hole 323 is formed so that the withdrawal hook member 220 extending from the pressure packing 210 penetrates. The withdrawal hook member 220 extending through the through hole 323 is formed in the hook groove 332 formed on the rear surface of the second drawer member 330 so as to be fastened.

Withdrawal hook member 220, when the pressing portion 200 is advanced to the front end side of the cylinder 100, the communication hole 151 of the divided packing 150 and the through hole 323 of the first withdrawal member 320 It passes through and is inserted into the hook groove 332 of the second withdrawal member 330, and the diameter of the hook groove 332 is formed smaller than the diameter of the rear end of the withdrawal hook member 220. However, as the withdrawal hook member 220 extends rearwardly from the front end portion, it is formed in a truncated cone shape in which the diameter gradually increases, and the diameter of the front end portion is formed smaller than the diameter of the hook groove 332 and the rear end of the second withdrawal member 330 Since the withdrawal hook member 220 may enter the hook groove 332 because it is formed of an additional elastic material, the rear end of the draw hook member 220 enters the inside of the hook groove 332 after entering. It does not withdraw in one state.

In addition, the first withdrawal member 320 is formed with an inlet hole 324 through which the injection agent can be introduced at a position spaced apart from the through hole 323, and the inside of the first withdrawal member 320 A moving space through which the injection agent introduced through the hole 324 can move is formed.

The second withdrawal member 330 has a rear end inserted into the first withdrawal member 320, and is fastened so that it cannot be separated forward by being caught by the fixing jaw 322, and the leading end is fastened with the injection needle 10 do.

A communication port 331 is formed at the rear end of the second withdrawal member 330 to allow the injection agent to move toward the injection needle 10, and the communication port 331 is formed only in a part of the section along the circumferential direction. 2 Depending on the rotational position of the withdrawal member 330, the communication port 331 is communicated to allow the injection of the injection agent or is closed to block the injection of the injection agent.

On the outer circumferential surface of the front portion of the second withdrawal member 330, the inlet blocking portion 333 is formed to protrude to the outside, and the inlet blocking portion 333 is allowed to pass through the external fastening member 310 (313). ), the communication port 331 is closed and the second withdrawal member 330 is able to enter the inside of the cylinder 100 through the external fastening member 310, and the inlet blocking portion 333 When located in the rest of the section other than the through hole 313, the inlet blocking portion 333 is caught by the external fastening member 310, and the second withdrawal member 330 is blocked from entering the inside of the cylinder 100. In particular, when the inlet blocking portion 333 is located in the entry blocking portion 314, the communication port 331 is opened, and the injection agent flows into the interior of the second withdrawal member 330 and then through the injection needle 10. Can be discharged.

In addition, a pressure blocking member 400 may be coupled to the rear end portion of the cylinder 100 to block the pressing portion 200 from entering the inside of the cylinder 100 and pressing.

The safety syringe 1 of this embodiment is a pre-filled syringe that pre-fills the injection agent with the cylinder 100 and is stored to prevent the injection agent from being taken out of the cylinder 100 due to unintended external force. And the pressure blocking member 400 as a means for preventing pressure in the transportation process.

The pressure blocking member 400 is spaced up and down around the expansion support 130, and the front support body 410 surrounding the outside of the cylinder 100, respectively, and the pressure unit 200 located at the rear portion of the cylinder 100 It includes a rear support 420 is installed to surround the extension rod 230 of the.

As shown in the drawing, the extension rod 230 is formed to have a cross-sectional shape of a cross, and a disk-shaped diaphragm 232 is formed on one side of the tip.

The pressure blocking member 400 has an annular groove corresponding to the outer shape of the cylinder 100 formed on the front support 410, and an entry groove corresponding to the extension rod 230 is formed on the rear support 420. In the state, when the front support 410 and the rear support 420 is sandwiched with the extended support 130 therebetween, the upper end of the rear support 420 is caught by the extended support 130 and the lower end is connected to the diaphragm 232. In the state in which the pressure blocking member 400 is caught, the extension rod 230 and the pressure packing 210 of the pressure part 200 cannot enter the inside of the cylinder 100, and thus the injection liquid is stored and stored during the storage and transportation of the syringe. To prevent leakage.

The method of using the safety syringe 1 according to the present invention described above is as follows.

First, the inside of the cylinder 100 is a state in which the solid injection and the liquid injection are respectively filled in the front space portion 161 and the rear space portion 162 divided by the divided packing 150, and the cylinder 100 The head unit 300 is mounted on the front portion.

The injection needle 10 is inserted into the injection position while the inlet blocking portion 333 of the second withdrawal member 330 is located at the entry blocking portion 314, and the pressing portion 200 is inside the cylinder 100. Advance to.

As the divided packing 150 moves to the front space part 161 according to the pressurization of the pressing part 200, the communication hole 151 is opened, and the liquid injection agent moves forward through the communication hole 151 and then becomes solid. It is mixed with an injection agent and injection is performed through the injection needle 10 through the second extraction member 330 and the second extraction member 330.

If the pressing part 200 is continuously pressed, only the pressure packing 210 moves until all the liquid injection agents are discharged to the front space part 161, but after all the liquid injection agents move to the front space part 161, the pressure packing is performed. The 210 and the split packing 150 come into contact, and the split packing 150 is pushed by the pressure packing 210 and moves forward. At this time, the withdrawal hook member 220 extending forward from the pressure packing 210 protrudes forward through the communication hole 151 of the divided packing 150.

When the pressure packing 210 and the split packing 150 are gradually advanced, when the split packing 150 moves to the front side of the cylinder 100 and the injection agent is discharged, the withdrawal hook member 220 is the second It is inserted into the hook groove 332 of the withdrawal member 330 and caught.

After all the injections are made, the user removes the injection needle 10 from the patient's body, and then the second withdrawal member 330 so that the withdrawal blocking portion 333 of the second withdrawal member 330 is located in the passage allowable groove 313 ) To rotate. In this state, when the extension rod 230 is pulled to the rear of the cylinder 100, the second drawing member 330, which is hung by the drawing hook member 220, is towed together with the first drawing member 320 and the cylinder 100 ).

The extension rod 230 is cut in the cutting guide portion 231 of the extension rod 230 while sufficiently entering the interior of the cylinder 100 so that the end of the injection needle 10 is not exposed.

When the cutting of the extension rod 230 is completed as described above, since all of the extension rod 230 to the injection needle 10 are drawn into the interior of the cylinder 100 and are not exposed, the operator is exposed to the injection needle 10 during handling and disposal. It can prevent stabbing.

In this embodiment, the cylinder 100 is a pre-filled syringe filled with two injections, and a divided packing 150 is provided inside, but unlike this, the pre-filled syringe filled with one type of injection or a medicine bottle in which the injection is stored It can be applied to general syringes in which injection is withdrawn and then injected.

The description of the presented embodiments is provided to enable any person of ordinary skill in the art to use or practice the present invention. Various modifications to these embodiments will be apparent to those skilled in the art of the present invention, and the general principles defined herein can be applied to other embodiments without departing from the scope of the present invention. Thus, the present invention should not be limited to the embodiments presented herein, but should be interpreted in the broadest scope consistent with the principles and novel features presented herein.

1: Safety syringe
10: needle
100: cylinder
110: discharge hole 120: entrance hole
130: extended support portion 140: locking jaw
150: split packing 151: communication hole
161: front space portion 162: rear space portion
163: internal protrusion section
200: pressing part
210: pressurized packing 220: withdrawal hook member
230: extension rod 231: cutting guide
232: curtain
300: head unit
310: external fastening member 311: jaw fixing member
312: Through hole 313: Pass through groove
314: entry block 315: departure prevention projections
316: blocking groove 320: first withdrawal member
321: anti-rotation projection 322: fixed jaw
323: Passing hole 324: Inflow hole
330: second withdrawal member 331: communication port
332: hook groove 333: incoming block
400: pressure blocking member
410: front support 420: rear support

Claims (3)

A cylinder having an inner space into which the injection agent is injected, and having a discharge hole formed so that the injection agent is discharged at a tip end;
A pressing part inserted into the cylinder and including a pressure packing capable of pressing the injection agent filled in the inside of the cylinder toward the discharge hole and an extension rod extending from the pressure packing to the outside of the cylinder;
It is installed in the interior of the cylinder and divided packing for dividing the inner space of the cylinder into a front part space and a rear part space.
An injection needle inserted to inject the injection agent discharged through the discharge hole into the patient's skin;
It is installed on the front end of the cylinder includes a head unit for supporting the injection needle,
The head unit is an external fastening member fixedly installed on the outside of the cylinder,
It is inserted into the interior of the cylinder is blocked from leaving the outside of the cylinder by the external fastening member, the first withdrawal member connected to the pressing portion after injection of the injection,
It is fastened to the first withdrawal member, the injection needle is connected, and includes a second withdrawal member including a withdrawal blocking portion that can be caught or released from the external fastening member to allow or block entry into the interior of the cylinder and,
The extension rod corresponds to the rear end of the cylinder when the first and second withdrawal members of the injection needle and the head unit enter the interior of the cylinder and the injection needle is not exposed to the outside. A cutting guide part that can be cut at the position is formed,
The divided packing is formed with a communication hole through which an injection agent can pass in the center, and is formed of a material capable of elastic deformation,
An inner protrusion section is formed on the inner circumferential surface of the cylinder so that the split packing is compressed and deformed so that the communication hole is closed when the split packing enters the rear portion, and the split packing leaves the inner protrusion section. A double-compartment pre-filled safety syringe configured to open the communication hole when entering the front space.
According to claim 1,
The outer fastening member is formed with a hollow of an inner diameter corresponding to the outer diameter of the front end of the cylinder, and a lower end is formed with a hook portion hanging from a locking jaw formed to protrude to the outside of the front end of the cylinder,
The first drawing member is a cylindrical member having an outer diameter corresponding to the inner diameter of the cylinder, and a through hole through which a drawing hook member extending from the pressurizing packing extends is formed at a lower portion, and an upper portion inside the upper surface of the external fastening member. It is inserted into the formed blocking groove, and the anti-rotation protrusion for blocking the first withdrawal member from rotating with respect to the external fastening member is spaced at a predetermined interval along the circumferential direction, and is formed to protrude upward a predetermined length,
The second withdrawal member is a double-compartment prefilling safety syringe, characterized in that a hook groove is formed through which the withdrawal hook member is inserted and coupled through the through hole.
According to claim 2,
The inlet blocking portion formed in the second withdrawal member protrudes a predetermined length outward from the outer circumferential surface of the second withdrawal member,
The external fastening member is formed with a through hole on the upper surface so that the second drawing member protrudes toward the front of the cylinder,
A pass through groove through which the intake blocking part passes can be allowed to move into the inside of the external fastening member is formed on one side of the through hole, and the rest of the blocking part can pass through the through hole. Double compartment pre-filled safety syringe, characterized in that the inner diameter is formed so as to correspond to the outer diameter of the second drawing member.

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