TWM609885U - Improved structure of safety syringe - Google Patents

Abstract

An improved structure of a safe injection syringe, a protective sleeve is sheathed on the outer circumference of a syringe with a needle, the tail of the syringe is combined with a drug-pushing assembly, and the outer side of the syringe near the end of the needle is provided with a bump and a protective sleeve The tube is provided with a guide chute that can slidably fit the protrusion along the axial direction. One end of the guide chute close to the needle is provided with a first positioning portion that can slightly position the protrusion across the needle, and the guide chute is away from the needle One end is provided with an irreversible strong positioning of the protrusion to prevent it from moving back into the second positioning part of the guide chute. The guide chute is close to the second positioning part and a side clamping part is transversely arranged on the side of the second positioning part. The side clamping part A stop protrusion is provided close to the guide chute, and the stop protrusion can slightly and spanfully block the protrusion from entering the side clamping portion or slipping into the guide chute from the side clamping portion. The protection The cannula can be slightly positioned by the side clip part before use, so that the needle can be retracted into the protective cannula, and the first positioning part can provide temporary positioning during injection, and the second positioning part provides the syringe and needle after injection The strong positioning in the protective sleeve is retracted to prevent the needle from accidentally extending out of the protective sleeve during the recovery process, which may cause danger.

Description

Improved structure of safety injection syringe

This creation is about an improved structure of a safe injection syringe, especially a syringe that is suitable for integration with a needle (cannot be disassembled), and can effectively isolate the needle before and after injection.

At present, the common injection needles, in order to facilitate transportation or storage, most of the needles and syringes are transported or stored separately, and the needles and the syringes can be combined when they are used; however, the general needles themselves are relatively weak and are susceptible to external forces. Because of bending damage, in actual application, a protective cover cap is usually put on the outer circumference of the needle. The protective cover cap can not only protect the needle before injection, but also isolate the needle after injection to avoid post-use The needles stabbed medical staff and caused infections.

However, after the injection is completed, since the used needle is still fixed to the front end of the syringe, when the medical staff is holding the syringe and trying to cover the protective cap on the needle, it is easy to fail to align it due to negligence Causes the aforementioned stab wound infection; therefore, various mechanisms for accommodating or isolating the needle after use are directly arranged on the injection needle, and there is no need to use a separate protective cap to align the needle after injection, which should effectively prevent the aforementioned The stab wound caused the absence of infection.

In the Republic of China Patent Announcement No. M289067, an improvement of a disposable anesthetic safety injection syringe is disclosed. It is attached to one end of the syringe with a bump on the side, and the outer circumference of the syringe is sheathed with a safety A protective sleeve is provided with a guide groove longitudinally on the safety protective sleeve, and a square slot defined by an isolating portion and a lateral extension are respectively provided on the end of the guide groove away from the protrusion in sequence toward the center.的Locating slot.

When storing, the bump is located in the positioning groove, so that the safety protection sleeve keeps protruding outward to isolate the end of the syringe; when in use, the safety protection sleeve can be rotated out of the positioning groove to make The safety protection sleeve can be folded and slid toward the syringe to make the needle protrude outward, and then a needle is combined with the end of the syringe to facilitate subsequent injection procedures; after the injection is completed, the needle can be The safety protection sleeve is pulled out, so that the protrusion is embedded in the square slot to form a positioning, so that the safety protection sleeve keeps the position of the outer circumference side of the needle to form isolation. This design makes the safety The protective sleeve slides in a fixed direction on the outer circumference of the needle barrel, and can be directly sleeved on the outer circumference of the needle, so it can effectively prevent accidental puncture of the needle after use.

However, since the above structure is simply designed for a needle structure that can be separated from the barrel, the needle must be assembled on the barrel before injection, which is more inconvenient to use. Furthermore, the positioning groove and the guide groove are inconvenient to use. The lack of an effective blocking mechanism between the two makes it easy for the protrusion to slide into the guiding groove from the positioning groove, making the safety protection sleeve easy to slide outside the barrel, which may cause the needle fixed on the barrel to be exposed to the outside. Serious lack of application.

In view of the above-mentioned shortcomings of the conventional safety injection needle structure, the creator researched and improved ways to address these shortcomings, and finally came up with this creation.

The main purpose of this creation is to provide an improved structure for a safe injection syringe. A protective sleeve is sheathed on the outside of a syringe with a needle. The tail of the syringe is combined with a drug pushing component. A convex block, the protective sleeve is provided with a guide sliding groove slidably engaged with the convex block along the axial direction, and one end of the guide sliding groove close to the needle is provided with a first positioning portion that can slightly position the convex block across, One end of the guide chute away from the needle is provided with a second positioning portion that is irreversibly powerfully positioned and prevents the protrusion from moving back into the guide chute. The guide chute is close to the side of the second positioning portion and a lateral clamping portion is provided. , The side clamping portion is provided with a blocking protrusion near the guide chute, and the blocking protrusion can slightly and leaningly block the protrusion from entering the side clamping portion or slipping into the guide slide from the side clamping portion In the groove, the protective sleeve can be slightly positioned by the side clip portion before use, so that the needle can be retracted into the protective sleeve, and the first positioning portion can provide temporary positioning for shrinking the protective sleeve during injection The second positioning part can provide strong positioning for the syringe and needle to be recovered in the protective sleeve after injection, thereby not only improving the convenience of use, but also preventing the needle from accidentally protruding out during the recovery process. Protect the casing and cause danger.

Another purpose of this creation is to provide an improved structure for a safety injection syringe, wherein the guide chute is provided with a side protrusion protruding inwardly on the side close to the first positioning portion, and the protrusion can enter, The first positioning portion forms a bidirectional partial block, and the guide chute close to the second positioning portion is provided with an oblique stop portion protruding obliquely toward the second positioning portion and having elasticity, which can be used for the convex The block forms a one-way strong barrier that is easy to enter the second positioning part and cannot be loosened outward, so as to prevent the protective sleeve from being loosened on the outer peripheral side of the needle after injection, and to ensure safe use.

In order to achieve the above objectives and effects, the technical means adopted in this creation include: a syringe with a needle at one end, and a bump on the outer side of the syringe near the end of the needle; a protective sleeve, which is slidably It is sleeved on the outer circumference of the needle barrel, and the protective sleeve is provided with an axially extending guide chute that can be fitted with the protrusion. The guide chute is provided with an end close to the needle head that can slightly position the The first positioning portion of the convex block, one end of the guide chute away from the needle is provided with an irreversibly strong positioning of the convex block and prevents the convex block from moving back into the second positioning portion of the guide chute, and the guide chute approaches the When the position of the second positioning part extends laterally to the side of the clamping part, and the protrusion is located at one of the second positioning part and the side clamping part, the needle is retracted into the protective sleeve.

According to the above-mentioned structure, the side locking portion is provided with a stop protrusion that can slightly position the protruding block in a position close to the guide chute, so that when the protruding block is in the side locking portion, a slight limit is formed. Position to stop the protrusion from sliding into the guide chute.

According to the above structure, a side of the guide sliding groove close to the second positioning portion is provided with an oblique stop portion protruding obliquely toward the second positioning portion and having elasticity.

According to the above structure, at least one side of the guide sliding groove close to the first positioning portion is provided with a convex side convex portion.

According to the above structure, the end of the syringe far away from the needle is combined with a drug pushing assembly, the pushing assembly has a push rod partially protruding into the syringe, and the push rod can drive a connecting portion on the syringe Reciprocating activities within.

According to the above structure, the middle section of the push rod is sheathed with a push rod seat, the push rod seat is fixed to the end of the needle cylinder by screwing, and the push rod seat is provided with an easy-to-handle grip.

According to the above structure, the needle is composed of an injection needle arranged on the outside of the barrel and a needle protruding toward the inside of the barrel.

In order to obtain a more detailed understanding of the above-mentioned purposes, effects and features of this creation, the following descriptions are made with the following drawings:

Please refer to Figures 1 and 2 to show that the main structure of this creation includes: a syringe 1, a drug-pushing assembly 2 and a protective sleeve 3, etc.; the two ends of the syringe 1 are respectively provided with a needle 11 and a joint The portion 12 (may be an external thread), the needle 11 has an injection needle 111 protruding outward, and a puncture needle 112 protruding toward the inside of the barrel 1, and a protrusion 13 is provided on the outer side of the barrel 1.

In a preferred embodiment, the protrusion 13 can be arranged at an end of the syringe 1 close to the needle 11; and the surface of the syringe 1 has a window 14 that can see through the interior.

The pusher assembly 2 has a push rod seat 21 and a push rod 20 penetrating the push rod seat 21. The push rod seat 21 is provided with an easy-to-handle grip 23 and a joined portion 221 (which may be an inner Thread), the coupled portion 221 (internal thread) can be coupled to the coupling portion 12 (external thread) to form a (threaded) fixation, so that the push rod 20 can protrude into the syringe 1 with one end and be coupled A connecting part 22.

The protective sleeve 3 is slidably sleeved on the outer peripheral side of the syringe 1, and an axially extending guide groove 31 is provided on the protective sleeve 3 and fitted with the protrusion 13, and the guide groove 31 is close to One end of the needle 11 is provided with a first positioning portion 311 that can slightly limit the protrusion 13 across, and an end of the guide slide 31 away from the needle 11 is provided with a second positioning portion that irreversibly strongly positions the protrusion 13 312. A side clamping portion 32 is transversely provided on the side of the guide sliding groove 31 close to the second positioning portion 312, and at least one side of the side clamping portion 32 is provided with a stopper protrusion at a position close to the guiding sliding groove 31 The portion 321 is used to slightly and surmountably block the protrusion 13 from entering the side clamping portion 32 or sliding into the guide chute 31 from the side clamping portion 32.

In a feasible embodiment, the guide chute 31 is provided with convex side protrusions 3111 on two sides close to the first positioning portion 311, and the protrusion 13 can pass through the side protrusions by appropriate force. Portion 3111, so that the protrusion 13 can form a slight positioning effect across the first positioning portion 311; and the guide chute 31 is close to a side of the second positioning portion 312, and is provided facing the second positioning portion 312. The positioning portion 312 is an obliquely protruding and elastic oblique stop portion 3121. The oblique stop portion 3121 allows the protrusion 13 to enter the second positioning portion 312 in one direction and forms an irreversible ground that cannot be loosened outward. Strong positioning.

In practical application, a medicine tube 4 containing medicines can be contained in the syringe 1, and an end plug 41 of the medicine tube 4 facing the injection needle 111 is pierced by the puncture needle 112 to make The medicine tube 4 communicates with the injection needle 111; and the medicine tube 4 is provided with a piston 42 at one end facing the medicine pushing assembly 2, and the piston 42 can be pushed by the connecting portion 22 to squeeze the inside of the medicine tube 4 The medicine can be injected into the human body through the injection needle 111.

Please refer to Figures 4 to 6, it can be seen that when the creation is stored, the protective sleeve 3 can be pulled out of the syringe 1, and the protrusion 13 can be embedded in the side clamping portion 32 to use the The stopping protrusion 321 slightly blocks the protrusion 13 so that the protrusion 13 cannot enter the guide chute 31 through the stopping protrusion 321 when there is no external force. The protective sleeve 3 can be used A protection is formed on the outer peripheral side of the injection needle 111 (as shown in Figure 3) to avoid damage to the injection needle 111 due to improper external force or stabbing the transportation personnel before storage or injection.

When in use, the protective sleeve 3 can be rotated laterally, so that the protrusion 13 can enter the guide chute 31 through the stop protrusion 321, and then push the protective sleeve 3 (as shown in Figure 4) Sliding toward the drug pushing assembly 2 so that it can be folded on the outer peripheral side of the syringe 1.

When the protective sleeve 3 is completely folded on the outer peripheral side of the syringe 1, the protrusion 13 can slide along the guide chute 31, and is inserted into the first positioning portion 311 through the side protrusion 3111. A position where the injection needle 111 protrudes slightly outward is formed (as shown in Figure 5) to facilitate subsequent injection actions.

After the injection is completed, force the protective sleeve 3 to be pulled out in a direction away from the drug pushing assembly 2, and the protrusion 13 slides along the guide chute 31, and is inserted into the oblique stop 3121 In the second positioning portion 312, the oblique stop portion 3121 is used to irreversibly and strongly block the protrusion 13 so that the protrusion 13 cannot enter the guide chute 31 in the reverse direction, so that the protective sleeve 3 can be fixed to the The peripheral side of the injection needle 111 forms a barrier (as shown in Figure 6) to prevent the injection needle 111 from accidentally stabbing the medical staff and causing infection during the recovery process of the syringe 1 after use.

Based on the above, the improved structure of the safety injection syringe of this invention can ensure that the injection target is exposed during use, and a protective sleeve is sleeved on the outer circumference of the injection needle before and after use to protect the injection needle. The effect of preventing infections caused by stab wounds is indeed a novel and progressive creation. A new patent is filed in accordance with the law; however, the content of the above description is only the description of the preferred embodiment of this creation, and all the technical means of creation based on this Any changes, modifications, alterations or equivalent replacements extended by the scope shall also fall within the scope of the patent application for this creation.

1: Syringe

11: Needle

111: injection needle

112: Needle

12: Joint

13: bump

14: Windows

2: push medicine component

20: putter

21: Push rod seat

22: Connection part

221: Bonded part

23: Grip

3: Protective casing

31: Guide chute

311: The first positioning part

3111: Side convex

312: The second positioning part

3121: Oblique stop

32: Side card

321: Stop convex

4: Pharmacy tube

41: end plug

42: Piston

Figure 1 is an exploded view of the three-dimensional structure of this creation.

Figure 2 is the appearance of the three-dimensional combination of this creation.

Figure 3 is a schematic diagram of the state of the creation of the present invention when it is stored and blocked on the outer circumference of the needle with a protective sleeve.

Figure 4 is a schematic diagram of the state of the original creation before use, when the protective sleeve is rotated to make the protrusion detach from the side clamping part.

Figure 5 is a schematic diagram of the injection state of this creation.

Figure 6 is a schematic diagram of this creation after the injection is completed, using the oblique stopper to block the protrusion to block the protective sleeve from the outer circumference of the needle.

1: Syringe

11: Needle

111: injection needle

112: Needle

12: Joint

13: bump

14: Windows

2: push medicine component

20: putter

21: Push rod seat

22: Connection part

221: Bonded part

23: Grip

3: Protective casing

31: Guide chute

311: The first positioning part

3111: Side convex

312: The second positioning part

3121: Oblique stop

32: Side card

321: Stop convex

4: Pharmacy tube

41: end plug

42: Piston

Claims (14)

An improved structure of a safe injection syringe, at least including: A needle cylinder with a needle at one end, and a bump on the outside of the needle cylinder near the end of the needle; A protective sleeve is slidably sleeved on the outer circumference of the needle barrel. A guide sliding groove extending axially and capable of fitting the protrusion is provided on the protective sleeve, and the guide sliding groove is close to the needle One end is provided with a first positioning portion that can slightly limit the protrusion by straddling, and one end of the guide chute away from the needle is provided with an irreversible strong positioning of the protrusion and a second positioning that prevents the protrusion from moving back into the guide chute Part, and when the part of the guide chute close to the second positioning part laterally extends one side of the clamping part, and the protrusion is located at one of the second positioning part and the side clamping part, the needle is retracted at Inside the protective sleeve. The improved structure of the safety injection syringe according to claim 1, wherein the side clamping portion is provided with a stop protrusion that can slightly limit the protrusion to make the protrusion close to the guide chute. In the state of entering the side clamping part, a slight limit is formed to stop the protrusion from sliding into the guide chute. The improved structure of the safety injection syringe according to claim 1 or 2, wherein a side of the guide chute close to the second positioning portion is provided with an oblique stop that protrudes obliquely toward the second positioning portion and is elastic unit. The improved structure of the safety injection syringe according to claim 1 or 2, wherein at least one side of the guide sliding groove close to the first positioning portion is provided with a convex side convex portion. The improved structure of the safety injection syringe according to claim 3, wherein at least one side of the guide chute close to the first positioning portion is provided with a convex side convex portion. The improved structure of the safety injection syringe according to claim 1 or 2, wherein the end of the syringe far away from the needle is combined with a drug pushing component, and the drug pushing component has a push rod protruding locally in the syringe, The push rod system can drive a connecting part to reciprocate in the needle cylinder. The improved structure of the safety injection syringe according to claim 3, wherein the end of the syringe far away from the needle is combined with a medicine pushing component, the medicine pushing component has a push rod protruding locally in the syringe, the pushing The rod system can drive a connecting part to reciprocate in the syringe. The improved structure of the safety injection syringe according to claim 4, wherein the end of the syringe far away from the needle is combined with a pusher component, the pusher component has a push rod partially protruding in the syringe, the push The rod system can drive a connecting part to reciprocate in the syringe. The improved structure of the safety injection syringe according to claim 5, wherein the end of the syringe far away from the needle is combined with a medicine pushing component, the medicine pushing component has a push rod partially protruding in the syringe, the pushing The rod system can drive a connecting part to reciprocate in the syringe. The improved structure of the safety injection syringe according to claim 6, wherein a push rod seat is sheathed in the middle section of the push rod, and the push rod seat is fixed to the end of the syringe by screwing, and is attached to the push rod seat It is equipped with an easy-to-handle grip. The improved structure of the safety injection syringe according to claim 7, wherein a push rod seat is sheathed in the middle section of the push rod, and the push rod seat is fixed to the end of the syringe by screwing, and is attached to the push rod seat It is equipped with an easy-to-handle grip. The improved structure of the safety injection syringe according to claim 8, wherein a push rod seat is sheathed in the middle section of the push rod, and the push rod seat is fixed to the end of the syringe by screwing, and is attached to the push rod seat It is equipped with an easy-to-handle grip. The improved structure of the safety injection syringe according to claim 9, wherein a push rod seat is sleeved in the middle section of the push rod, and the push rod seat is fixed to the end of the syringe by screwing, and is attached to the push rod seat It is equipped with an easy-to-handle grip. The improved structure of the safety injection syringe according to claim 1 or 2, wherein the needle is composed of an injection needle arranged on the outside of the syringe and a needle protruding toward the inside of the syringe.

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