KR200330793Y1 - Safety syringe - Google Patents

Abstract

In order to provide a safety syringe made of a syringe that is automatically hidden inside the sleeve after use without a separate operation to prevent secondary infection from the used syringe, and can not be reused once used.

A barrel formed in the interior to store the injection liquid, and a rear end formed of an opening to support the fingers; A plunger slidably inserted along the space portion of the barrel to fill and store the injection liquid in the space portion of the barrel or to discharge the stored injection liquid out of the barrel; A needle connected to the tip of the barrel; A sleeve which is inserted in the outer longitudinal direction of the barrel to receive the needle in a safe position so that the needle is not exposed to the outside after using the syringe; A holding member and a release member provided at the rear end of the sleeve to hold the barrel before using the syringe, and to release the barrel to retract the needle into the sleeve when the syringe is used; It provides a safety syringe including a locking member for fixing the released barrel in the sleeve so that the syringe once used cannot be reused.

Description

Safety Syringe {SAFETY SYRINGE}

The present invention relates to a safety syringe, and more particularly, a safety syringe made of a syringe that is automatically hidden inside the sleeve without additional operation after use to prevent secondary infection from the used syringe, and is not reusable after being used once. It is about.

In general, a syringe can be divided into a barrel, which is a main body having an inner space, and a needle, respectively, which can be largely divided into a detachable syringe used by combining a needle with a barrel, and an integrated syringe with an integrated needle. have.

In most cases, the detachable syringe consists of a medium and large syringe with a relatively large barrel capacity, and the integrated syringe is a small syringe with a relatively small barrel capacity.

These syringes are used to select the appropriate syringe depending on the amount of drug to be administered or the patient's condition.In the case of a detachable syringe, after using the syringe, cap the needle and then remove the needle from the barrel to inject the barrel and injection. The needle is disposed of separately, and in the case of an integrated syringe, a needle is capped to dispose of the needle and the barrel integrally.

However, the syringe handler may be stuck in the needle when the cap is reinserted into the needle after using the syringe.In addition, during the disposal of the syringe, the cap on the needle may be separated and the disposal person may be stuck in the needle. There is always.

When a medical staff or a person disposing of a syringe is stuck in a needle of a used syringe, there is a high possibility that the patient's disease may be infected by the blood of the patient remaining in the needle, and such an example has been reported substantially.

For these reasons, safety syringes have recently been used as a way to prevent secondary infection of patients due to stabbing of medical staff or syringe disposal processors from used needles of used syringes.

This safety syringe has a structure in which the sleeve is assembled on the outside of the syringe. When the syringe is used, the syringe and the needle are retracted into the sleeve by the elasticity of the elastic member so that the needle is positioned inside the sleeve. It is designed to prevent being pierced by needles.

In addition, the safety syringe so that the cylinder is locked to the reuse prevention jaw formed in the sleeve during the above operation, so that the syringe used once can not be reused.

However, such a conventional safety syringe is difficult to manufacture a sleeve because a part of the middle portion of the sleeve is made of a reuse prevention jaw, and in particular, since the reuse prevention jaw is formed on both sides of the inside of the sleeve, the syringe is used after the use of the syringe. When pulling or pushing the jammed syringe, there is a problem that can be reused by reducing the syringe to a position before use.

In addition, the conventional safety syringe has a disadvantage that the replacement of the needle is impossible because the needle is fixed to the cylinder integrally.

The present invention is devised to solve the conventional problems as described above, the object of the present invention is to prevent secondary infection from the syringe used by automatically hiding the needle inside the sleeve without any operation after use, once It is intended to provide a safety syringe that is not intended for reuse after use.

In order to realize the object of the present invention as described above, the interior is formed in the space portion is made to store the injection liquid, the rear end is made of an opening portion formed barrel to support the finger;

A plunger slidably inserted along the space portion of the barrel to fill and store the injection liquid in the space portion of the barrel or to discharge the stored injection liquid out of the barrel;

A needle connected to the tip of the barrel;

A sleeve which is inserted in the outer longitudinal direction of the barrel to receive the needle in a safe position so that the needle is not exposed to the outside after using the syringe;

A holding member and a release member provided at the rear end of the sleeve to hold the barrel before using the syringe, and to release the barrel to retract the needle into the sleeve when the syringe is used;

It provides a safety syringe including a locking member for fixing the released barrel in the sleeve so that the syringe once used cannot be reused.

1 is an exploded perspective view of a safety syringe according to the present invention.

Figure 2 is an assembly cross-sectional view of the safety syringe according to the present invention.

3 is a cross-sectional view of the barrel provided in the safety syringe of the present invention.

4 is a front view of the plunger provided in the safety syringe of the present invention.

5 is a cross-sectional view of the sleeve provided in the safety syringe of the present invention.

6 is a cross-sectional view of a holder provided to the safety syringe of the present invention.

7 is a bottom view and cross-sectional view of the adapter provided in the safety syringe of the present invention.

8 is a cross-sectional view of the use state of the safety syringe according to the present invention.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in more detail.

1 is an exploded perspective view of a safety syringe according to the present invention, Figure 2 is a cross-sectional view of the combined safety syringe according to the present invention, the safety syringe according to the present invention, having a space inside and the rear end barrel (2) And a plunger (4) slidably inserted along the space of the barrel (2) to fill and store the injection liquid in the space of the barrel (2) or to discharge the stored injection liquid out of the barrel; A needle 6 connected to the tip of the barrel 2 and a sleeve inserted in the outer longitudinal direction of the barrel 2 to accommodate the needle 6 in a safe position so that the needle 6 is not exposed to the outside after the syringe is used ( 8) and the barrel (2) provided at the rear end of the sleeve (8) to hold the barrel (2) before using the syringe, and release the barrel (2) when the syringe is finished using the sleeve (6) sleeve (8) mine And a locking member that prevents to reuse the holding member and the holding and releasing member, the syringe once used to secure the barrel (2) releasing the holding the inner sleeve (8) to accommodate to retreat to.

As shown in FIG. 3, the barrel 2 is formed in a cylindrical shape having a constant diameter and is formed as a connecting portion 10 to which a needle 6 is connected to an outer side of the front end, and a planar side outside the rear end. Branch 12 is formed.

The connecting portion 10 is made so that the needle 6 can be detachably connected, the upper outer peripheral portion is provided with a fixing projection 13 to be inserted and fixed to the adapter to be described later, both sides of the flange portion 12 The locking groove 14 is formed to hold the barrel 2 in the state where the holding member is described below is inserted and supported in the locking groove 14 and the syringe is assembled to prevent rotation.

In addition, a plurality of locking projections 15 formed at the front end of the barrel 2 and engaged with the upper end of the adapter are formed, and when the needle 6 is coupled to the connecting portion 10, the needle 6 is It is designed to prevent idleness.

As shown in FIG. 4, the plunger 4 movably inserted along the inside of the barrel 2 is tightly assembled with a rubber gasket 16 at the distal end thereof to maintain airtightness during the suction and discharge of the injection liquid. It is formed to be, and the rear end is formed with a pressure plate 18 used to move the plunger 4 in the barrel 2, the holding release member at the lower side with a slight distance from the pressure plate 18 A working plate 20 is provided for actuation.

The pressure plate 18 and the operation plate 20 may be formed in a disk shape having a predetermined diameter.

The needle 6 is detachably connected to the connecting portion 10 of the barrel 2 so that it can be used to select a suitable one for use, and the protective cap 22 is covered on the outside of the needle 6 Lose.

As shown in FIG. 5, the sleeve 8 has a cylindrical shape having an inner space and a sleeve body 8a through which both ends are inserted so that the barrel 2 can be inserted, and a rear end of the main body 8a. An extension portion 8b extending from and gradually formed to a larger diameter, and a support portion 8c formed at the end of the extension portion 8b to support the user's finger when using a syringe.

The reuse prevention jaw 26 is formed between the sleeve body 8a and the expansion part 8b so that the syringe used once cannot be reused. The reuse prevention jaw 26 according to the present embodiment has an end portion of the sleeve body 8a. After the barrel 2 of the syringe, once used, has a protruding jaw formed in the inner circumferential direction and retracts along the sleeve 8, the adapter described later is caught by the reuse prevention jaw 26 to completely prevent the reuse of the syringe. .

In addition, a locking groove 8b in which a holding member is inserted and fixed is formed on an inner circumferential surface of the end of the extension part 8b.

The rear end of such a sleeve 8 is provided with a holding member for holding the syringe in the sleeve 8 prior to using the syringe, which holding member 28 is inserted into and fixed inside the rear end of the sleeve 8. ) And a ring 30 whose one side is supported by the holder 28, and a compression coil spring 32 interposed between the ring 30 and the flange portion 12 of the barrel 2.

As shown in FIG. 6, the holder 28 includes an insertion part 34 having a locking step 33 corresponding to the locking groove 8b of the sleeve 8 so that the holder 28 can be fixedly inserted into the sleeve 8. A flange 36 serving as a stopper to restrict the insertion of the insertion part 34, and formed in a direction opposite to the insertion part 34 and fitted into the catching groove 14 of the barrel 2 to be inserted into the barrel 2. A locking plate 38 for restricting the rotation of the locking plate 38 and an end portion of the locking plate 38 to restrain the barrel 2 to the sleeve 8 while maintaining the compressed state of the spring 32. It consists of a hook 40.

The ring 30 has a plurality of ribs 42 are formed in the circumferential direction of the outer circumferential surface to be inserted and fixed inside the insertion portion 34 of the holder 28, the ribs 42 are one side of the spring (32) It is formed to substantially support the.

This holding member is flanged 12 of the barrel 2 and the ring 30 coupled to the holder 28 and the barrel 2 fitted in the sleeve 8 in the initial state before the syringe is used. ) Is positioned in a state of being compressed and outwardly resilient, wherein the locking plate 38 of the holder 28 is inserted into the locking groove 14 of the barrel 2 and the hook 40 is flanged 12. It is configured to keep a held state over).

In order to prevent the holding state from being released by an external force, a protective cap 44 is provided on the outer side of the pressing plate 18 and the operating plate 20 of the plunger 4 to be detachably covered with the operating plate 20.

The holding release member for releasing such a holding state includes the operation plate 20 formed on the plunger 4 and the hook 40 so as to open the locking plate 38 to both sides by the pressing operation of the operation plate 20. It includes a downward inclined surface 46 and the compression coil spring 32 formed on the outer surface of the.

The holding release member is operated by pressing the pressing plate 18 of the plunger 4 after the protection cap 44 is removed, and the operating plate 20 moves together with the inclined surface 46 of the holder 28. Pressing the pressure plate 18 further in this state, the operation plate 20 is moved downward of the inclined surface 46 to open the locking plate 38 to both sides, and the hook 40 at the flange portion 12 of the barrel 2. Is deviated.

At this time, the barrel 2 fixed to the holder 28 is moved toward the rear end of the sleeve 8 by the outward elasticity of the spring 32 that has been compressed to retract the needle 6 into the sleeve 8.

The locking member is provided to fix the released barrel 2 inside the sleeve 8 so that the syringe once used cannot be reused, and the locking member of the present embodiment is inserted into the connection part 10 of the barrel 2 to protrude. An adapter 50 fixedly supported by 13, a ring 30 which serves as a stopper for limiting the retraction of the adapter 50 retracting into the sleeve 8 together with the barrel 2, and the retracted adapter The tip outer periphery of the tip 50 is contacted and includes a reuse prevention jaw 26 for preventing the advance of the barrel 2.

As shown in FIGS. 7A and 7B, the adapter 50 is formed such that a through hole 52 is formed in the longitudinal direction of the central portion so that the adapter 50 can be inserted into the connection portion 10 of the barrel 2. The inner circumferential surface of the upper end portion is formed as a locking jaw 54 so as to be caught by the protrusion 13 of the connecting portion 10 so that the adapter 50 can be firmly assembled to the connecting portion 10.

In addition, the upper surface of the adapter 50 has another locking protrusion 55 formed to be caught by the locking protrusion 15 formed at the tip of the barrel 2 to couple the injection needle 6 to the connecting portion 10. The needle 6 is configured to prevent the needle 6 from being lost.

In addition, a thread 56 is formed on the inner circumferential surface of the through hole 52 of the adapter 50 so as to be more firmly assembled when assembling the needle 6 to the connecting portion 10, and an upper end of the through hole 52 is formed. The outer circumferential surface is formed with a plurality of wings 58 formed radially.

The wing portion 58 has an upper end connected to the adapter 50, and the lower end is formed in each independent form inclined downward in the state consisting of a free end, the free end of the wing 58 in the assembly of the syringe is a sleeve ( 8) Assembled in a slightly compressed state with resistance to the inner surface, and after use of the syringe is assembled to retract into the sleeve 8 together with the barrel 2 by the operation of the holding release member.

The free end of the wing 58, which was compressed at the time of retraction of the barrel 2, unfolds when passing through the expansion 8b, wherein the upper end of the adapter 50 is in contact with the ring 30 acting as a stopper. The retraction of the barrel 2 is stopped.

Accordingly, the wing 58 of the adapter 50 is caught by the reuse prevention jaw 26 of the sleeve 8 to prevent the barrel 2 from moving forward.

The safety syringe of the present invention as described above, in the initial state before using the syringe, as shown in Fig. 2, the barrel 2, the needle 6 is assembled, the ring 30 and the flange portion 12 of the barrel 2 ) Is positioned inside the sleeve 8 in a state in which the spring 32 is compressed between the hooks 40, and the hook plate 38 of the holder 28 is inserted into the hook groove 14 of the barrel 2. ) Is held by the flange portion 12 to be held.

At this time, the needle (6) is located on the outside of the sleeve (8), the protective cap (22) is covered on the outside of the needle (6) to prevent the user and other people from being stuck, the plunger ( Another protective cap 44 is also covered on the outside of 4) to prevent the syringe from being released due to carelessness of the user.

In this holding state, to replace the needle 6 assembled in the syringe with another needle, the protective cap 22 is rotated in the opposite direction as when the needle 6 is assembled. It is detached from the connection 10 of the barrel 2 while rotating along the thread 56 of 50.

At this time, the engaging protrusions 55 and 15 formed on the upper surface of the adapter 50 and the tip of the barrel 2 are caught, thereby preventing the adapter 50 from being lost, and the locking groove 14 of the barrel 2. Since the locking plate 38 of the holder 28 is inserted into the holder 28, the adapter 50 and the barrel 2 remain fixed without being rotated together even when the needle 6 is rotated. It can be replaced easily.

When the needle suitable for injection is selected and connected to the barrel 2, the protective caps 22 and 44 covered by the needle 6 and the plunger 4 are removed, respectively, and the needle 6 is removed from the patient. When the plunger 4 is retracted after being inserted into a drug reservoir (not shown) to be injected into the drug reservoir, the drug of the drug reservoir is introduced into and stored in the inner space of the barrel 2 as shown in FIG. 8A.

After inserting the syringe needle 6 of the syringe into the blood vessel or muscle of the patient, the finger is supported by the support 8c of the sleeve 8 and the pressing plate 18 of the plunger 4 is pressed. The drug stored in is administered to the patient while being discharged through the needle (6).

The administration of the drug proceeds until the gasket 16 of the plunger 4 is advanced to the tip of the barrel 2, and when the administration of the drug is completed, the operation plate 20 of the plunger 4 as shown in FIG. It comes in contact with the inclined surface 46 of the holder 28.

Pressing the pressure plate 20 further in this state, the operation plate 20 is moved to the lower side of the inclined surface 46 by the operation of the holding release member to open the locking plate 38 of the holder 28 to both sides, accordingly The hook 40 is released from the flange portion 12 of the barrel 2, at which time the barrel 2, which has been fixed to the holder 28 by the outward elasticity of the spring 32 that has been compressed, is the rear end of the sleeve 8. While moving to the side, the needle 6 retracts into the sleeve 8 as shown in FIG. 8C.

When retracting the barrel 2 thus released, the adapter 50 also retreats, and the retraction of the adapter 50 proceeds until it comes in contact with the ring 30 serving as a stopper.

At this time, the free end of the wing portion 58 of the adapter 50, which has been compressed, is unfolded by itself when passing through the expansion portion 8b of the sleeve 8, and comes into contact with the reuse prevention jaw 26 to prevent the advancement of the barrel 2. prevent.

Accordingly, the upper portion of the adapter 50 is in contact with the ring 30 and the wing 58, which is the lower side of the adapter 50, is caught by the reuse prevention bar 26 of the barrel 2 to restrain the barrel 2. .

Therefore, it is possible to prevent the barrel 2 from being pulled out behind the sleeve 8 or advancing forward of the sleeve 8 to prevent reuse of the syringe.

As described above, the safety syringe according to the present invention has a structure in which the upper and lower portions of the adapter fixed to the barrel are constrained to the holder and the sleeve while the barrel of the used syringe retreats into the sleeve, thereby preventing secondary infection from the used syringe. It is possible to completely prevent the barrel from pulling out behind the sleeve or advancing forward of the sleeve to prevent reuse of the syringe.

In addition, the needle can be used to replace, and when the needle is replaced, the holder can prevent the rotation of the barrel to facilitate the replacement of the needle.

Claims (13)

A barrel formed in the interior to store the injection liquid, and a rear end formed of an opening to support the fingers; A plunger slidably inserted along the space portion of the barrel to fill and store the injection liquid in the space portion of the barrel or to discharge the stored injection liquid out of the barrel; A needle connected to the tip of the barrel; A sleeve which is inserted in the outer longitudinal direction of the barrel to receive the needle in a safe position so that the needle is not exposed to the outside after using the syringe; A holding member and a release member provided at the rear end of the sleeve to hold the barrel before using the syringe, and to release the barrel to retract the needle into the sleeve when the syringe is used; And a locking member to fix the released barrel inside the sleeve so that the syringe once used cannot be reused. The barrel of claim 1, wherein the outer end of the barrel is formed of a connecting portion to which the needle is detachably connected, and the outer end of the barrel is formed with a flange, and a holder is fitted to the flange to prevent the barrel from rotating. A safety syringe, characterized in that formed. The safety syringe of claim 1, wherein a non-reuse jaw is formed in the sleeve to prevent reuse of the used syringe. The safety syringe of claim 3, wherein the anti-reuse jaw is formed along an inner circumferential direction of an end portion of the sleeve. The holder of claim 1, wherein the holding member comprises a holder inserted into and fixed to a sleeve, a ring supported at one side of the holder, and a coil spring interposed between the flange of the ring and the barrel, wherein the barrel compresses the spring. While being inserted into the sleeve while being restrained by the holder to maintain a holding state. The safety syringe according to claim 5, wherein the barrel has a locking groove formed in the flange portion, and the holder has a locking plate fitted to the locking groove of the barrel to limit the rotation of the barrel. 6. The safety syringe of claim 5, wherein a protective cap is detachably provided on an outer side of the pressure plate and the operation plate of the plunger inserted into the barrel to prevent the holding state from being released by an external force. The holding member of claim 1, wherein the holding release member comprises: an operation plate formed on the plunger, a downward inclined surface formed on an outer surface of the hook so as to open the engaging plate of the holder to both sides by pressing the operating plate; A safety syringe consisting of a coil spring which, when the barrel held in the holder is released, moves the barrel toward the rear end of the sleeve to retract the needle into the sleeve. The locking member of claim 1, wherein the locking member includes an adapter inserted into and fixed to a connecting portion of the barrel, a ring that serves as a stopper when the barrel is retracted into the sleeve, and a tip outer peripheral portion of the adapter retracted with the barrel. Safety syringe, characterized in that made of a reusable jaw to prevent the advance of the barrel. The method of claim 9, wherein the adapter is formed so that the through-hole is formed in the longitudinal direction of the center portion can be fitted to the connecting portion of the barrel, the outer peripheral surface of the upper end is provided with a plurality of wings formed radially, the inner peripheral surface of the upper end of the hole is a projection of the connection portion A safety syringe, characterized in that formed in the engaging jaw is configured so that the adapter can be firmly assembled to the connection portion. The method of claim 10, wherein the wing portion of the adapter is made of each independent form inclined downward, the lower portion is formed as a free end, the free end portion of the wing during assembly is characterized in that assembled in a slightly compressed state on the inner surface of the sleeve Safety syringe. The method of claim 10, wherein the wing of the adapter is configured to prevent the advance of the barrel by contacting the reusable jaw unfolded by its elastic force when passing through the extension of the sleeve by the operation of the holding member after using the syringe. Characterized by a safety syringe. The method of claim 9, wherein the upper surface of the adapter and the front end of the barrel is formed with a locking projection, respectively, characterized in that the needle is configured so that the needle can be coupled without turning by limiting the rotation of the adapter when coupling the needle to the connecting portion Safety syringe.