CN100536949C - Disposable safety injection syringe for anesthetic - Google Patents

Abstract

The invention relates to a disposable safety injection syringe for anesthetic, which mainly discloses an injection syringe consisting of a syringe barrel, a push rod, a needle head and a safety protection sleeve.

Description

Disposable Anesthetic Safety Injection Syringes (1)

technical field

The invention relates to a disposable anesthetic safety injection syringe, in particular to a disposable safety injection syringe with a safety protection sleeve in the technical field of medical equipment.

Background technique

According to the traditional anesthetic injection syringe, although the material of the injection syringe is very good in design, it is designed to be used with the special stainless steel syringe in the current medical equipment, and the stainless steel syringe is due to the cost. It is expensive and cannot be discarded after use, so it usually needs to be disinfected and reused after use. Once the disinfection is not complete, it will cause the risk of bacterial infection. Also, the needle at the front end of the anesthetic injection syringe is a double-ended needle. Usually, after use, the double-ended needle needs to be removed from the front end of the stainless steel syringe and then the stainless steel syringe is sterilized. It is easy to prick the fingers of the medical staff, which will also cause the risk of bacterial infection.

In view of this, the present inventor finally improved and invented a disposable anesthetic safe injection syringe through continuous experiments and tests.

Contents of the invention

The main purpose of the present invention is to propose a disposable anesthetic safety injection syringe, the components of the injection syringe are all made of plastic, so that the injection syringe can be discarded directly after use, without repeated disinfection, so as to prevent accidental disinfection And there is a risk of infection.

Another object of the present invention is to provide a disposable anesthetic safety injection syringe, the injection syringe can be retracted into the safety protection sleeve after use and be locked, and all the components of the syringe can be discarded. The needle does not need to be removed, so there is no risk of stabbing medical personnel and the used injection syringe and needle are not likely to be reused.

In order to achieve the above purpose and effects, the present invention adopts technical means and solutions including: a syringe with a handle, a needle, a push rod and a safety protection sleeve, wherein,

The syringe is a cylindrical body, which accommodates the drug tube inside. The rear end of the syringe has a male thread, and the front end has a small-diameter part of the male thread. A protrusion is provided on the outer periphery of the front end of the syringe;

A handle engaged with the syringe is a plastic hollow short cylinder with a large and small diameter portion, and the internal thread of the large diameter portion at the front end is screwed into the male thread at the rear end of the syringe to join together. The rear end allows the rod body of the push rod to extend into the syringe to push the piston of the medicine tube, so that the medicine can be injected into the human body;

The push rod is a long rod body, its rear end has a buckle portion for the thumb to buckle in, and its front end forms a push end with a diameter slightly smaller than the medicine tube piston;

The needle is a short cylinder of a double-ended needle;

The safety protection sleeve is an elongated plastic tube with an inner diameter slightly larger than the outer diameter of the syringe, so that the safety protection sleeve can be placed on the outer circumference of the syringe, and opposite to the outer circumference of the safety protection sleeve. At the position of the protrusion of the syringe, there is a longitudinal guide groove for the insertion of the protrusion of the syringe. The guide groove includes a front end and a rear end, and the rear end includes a concave curved section And a locking groove that can cooperate with the elastic deformation stopper, the elastically deformable narrowing neck behind the concave curved section, so that the needle of the syringe can be borrowed by the needle before it is about to be discarded. The guide groove is guided to make the needle retract into the safety protection sleeve first, and then the guide bump enters the concave curved section and is locked by the locking groove, so that once the bump passes through the rear end After turning into the locking groove, it cannot be removed for use again, so as to ensure the safety of the injection syringe in use.

The beneficial effect of using the present invention is that: the feature of the present invention is that all components of the injection syringe are made of plastic, and after use, the needle is retracted into the safety protection sleeve and locked, and all the components of the syringe can be discarded without repeated injection. Disinfection is used to achieve the purpose of preventing infection due to inadvertent disinfection.

In order to make the above purpose, function and features of the present invention more concretely understood, preferred embodiments of the present invention accompanied by drawings are described in detail as follows.

Description of drawings

Fig. 1 is the appearance perspective view of the embodiment of the present invention;

Fig. 2 is the three-dimensional exploded view of the embodiment of the present invention;

Fig. 3 is a schematic plan view of the combined use state of the embodiment of the present invention;

Fig. 4 is a schematic plan view of an embodiment of the present invention before being discarded after use;

Figure 4A is a partial enlarged view of Figure 4;

FIG. 5 is a schematic cross-sectional view of FIG. 3 .

Detailed ways

First of all, please refer to Fig. 1-Fig. 5, which is an embodiment of the disposable anesthetic safety injection syringe of the present invention, which mainly consists of a syringe 10 containing a handle 12, a push rod 20, and a safety protection cover. tube 30, a needle 40 and a drug tube 50, wherein,

The medicament tube 50 is a glass circular tube body with a standard diameter of the traditional specification. One end is a closed end 51 closed by a soft material, and the other end is a piston 52 that can move longitudinally in the medicament tube 50. The medicament tube The injection medicine is accommodated between the piston 52 of the 50 and the closed end 51;

The syringe 10 is a longitudinal plastic hollow cylinder, and the interior of the syringe 10 has an accommodating space 11 for accommodating the medicine tube 50 therein, and the rear end 13 of the syringe 10 has a male thread 130, the The front end of the syringe 10 has a small-diameter portion 15 of a male thread, and a protrusion 14A is provided on the outer periphery of the large-diameter portion of the syringe 10 at the rear end of the small-diameter portion 15. The protrusion 14A is a triangular block in this embodiment, and the triangular block is The front is high and the rear is low, and it is an inclined top surface, so as to facilitate the following assembly with the safety protection sleeve 30 and the locking operation of its positioning;

And the handle 12 engaged with the syringe 10 is a plastic hollow short cylinder with a large and small diameter portion, and the internal thread 122 of the large diameter portion 121 at the front end is screwed on the male thread 130 at the rear end 13 of the syringe 10, so as to The two are joined together, and a guide hole 120 is provided at the small diameter part of the rear end of the handle 12, so that the rod body of the push rod 20 can extend into the accommodation space 11 of the syringe 10 to push the piston 52 of the medicine tube 50, injecting medicine into the body;

The push rod 20 is a long rod body. The rear end of the push rod 20 has a buckle portion 22 for the thumb to buckle in, and its front end forms a push end 21 with a diameter slightly smaller than the piston 52 of the medicine tube 50. The butt end 21 is fitted with an elastic rubber ring 23 adjacent to the rear end, and the elastic rubber ring 23 is set on the rod body of the push rod 20 after the rod body of the push rod 20 passes through the guide hole 120 of the pull handle 12, so as to prevent the push rod 20 from colliding with the push rod 20. Unexpected detachment of handle 12 during use;

The needle 40 is a short cylinder, and the needle 40 is recessed toward one end of the syringe 10 to form an inner threaded hole 403. The inner threaded hole 403 is compatible with the small-diameter portion 15 of the male thread at the front end of the syringe 10. Screw together (as shown in Figure 2 and Figure 5), and the interior center of this internal screw hole 403, then protrudes outward toward the opening of the internal screw hole 403, a puncture needle 401 that can pierce the closed end 51 end surface of the drug tube 50, and At the other end of the needle 40 relative to the puncture needle 401, an injection needle 402 protrudes, and the injection needle 402 and the puncture needle 401 are connected to each other through a small perforation;

The safety protection sleeve 30A is a lengthwise plastic tube body, and the inner diameter of the inner hole 31 of the safety protection sleeve 30A is slightly larger than the outer diameter of the syringe 10, so that the inner hole 31 of the safety protection sleeve 30A can The assembled needle head 40 and the front end of the syringe 10 form a sleeve (as shown in Figure 3 and Figure 5 ), and the outer circumference of the safety protection sleeve 30A is set relative to the position of the guide protrusion 14A of the syringe 10 for a The linear guide groove 332A and a locking groove 335A embedded in the guiding protrusion 14A of the syringe 10, wherein the guiding groove 332A and the locking groove 335A extend longitudinally from the front end of the safety protection sleeve 30A toward the rear end (such as 2); the linear guide groove 332A has a front end 331A and a rear end 333A, and the front end 331A is stopped by the guide projection 14A of the syringe 10 so that the medical staff can perform the injection operation, and the The rear end 333A is used for the positioning and stopping of the guide projection 14A of the syringe 10 before the syringe 10 is not in use, so that when the medical personnel want to perform injection operations, they can move to the front end 331A from it, and the card The stop groove 335A is arranged at the rearmost end of the rear end portion 333A. Specifically, as shown in FIG. 4 and FIG. An elastically deformable stop portion 334A and a locking groove 335A are arranged behind the curved section, and the elastically deformable stop portion 334A is deliberately deformed backward in this embodiment. characteristics, and does not have the characteristics of forward deformation, so that before the injection syringe is intended to be discarded after use, as described in the foregoing embodiment, the syringe 10 is first pulled back, so that the protective sleeve 30A stretches forward, and The needle head 40 is retracted, so that the triangular protrusion 14A on the syringe 10 enters the rear end 333A from the front end 331A according to the guidance of the guide groove 332A, and then passes through the deformation stopper 334A. As mentioned above, 334A has the characteristic of backward deformation so that once the triangular projection 14 is locked in the locking groove 335A, even if the syringe 10 can no longer be moved out, the needle 40 is guaranteed to be locked in the protective sleeve 30A, thus Achieve absolute safety and sanitation to eliminate the risk of infection of the syringe 10 due to poor disinfection or re-use of the needle after cleaning;

Thereby, when the disposable anesthetic safety injection syringe of the present invention is assembled (as shown in Fig. 3 and Fig. 5 ), the inner screw hole 403 of the needle 40 and the small diameter portion 15 of the male thread at the front end of the syringe 10 are formed. screwed (as shown in Figure 5), and the outer circumference of the needle 40 and the syringe 10 is sleeved with the safety protection sleeve 30A, and the guide groove 332A of the outer circumference of the safety protection sleeve 30A is sleeved with the syringe 10 on the guide protrusion 14A of the safety protection sleeve 30A, and is locked by the locking groove 335A on the safety protection sleeve 30A, so that the syringe 10 can be placed inside the safety protection sleeve 30A and positioned on the syringe 10 , so as to avoid the danger of the user being stabbed by the injection needle 402 .

When the present invention is intended to be used for injection (as shown in Figure 3 and Figure 5), the drug tube 50 is loaded into the accommodating space 11 from the rear end of the syringe 10 (as shown in Figure 2 and Figure 5), and then Push the handle 12 of the push rod 20, push the piston 52 of the medicine tube 50 to move with the pushing end 21 of the push rod 20, and press the closed end 51 against the front end wall of the accommodating space 11 of the syringe 10, at the same time Make the piercing needle 402 of the needle 40 penetrate into the closed end 51 of the medicine tube 50 to contact with the medicine;

Then, the user presses the grip portion on the safety protection sleeve 30A with his hands, and then the user pushes the entire safety protection sleeve 30A toward the syringe 10 with his hands, that is, pushes it backward (as shown in Figures 3 and 5 ). shown), so that the injection needle 402 of the needle 40 is exposed from the front hole 32 of the safety protection sleeve 30A so as to facilitate injection.

In addition, it must be emphasized that the syringe 10, push rod 20, needle 40 and safety protection sleeve 30A of the present invention can all be made of plastic, so when the disposable anesthetic safety injection syringe of the present invention After use, when the syringe 10 is pulled back to the state where it is locked and positioned in the safety protection sleeve 30A, the entire safety injection syringe can be discarded as medical waste, which truly achieves absolute safety and security. Hygienic to eliminate the risk of infection due to careless disinfection. The above-mentioned triangular protrusion 14A in this embodiment is not necessarily triangular, and other appropriate shapes are also feasible.

In summary, the present invention is indeed a very excellent creative idea, and it is proposed to apply for an invention patent according to the law; but the content of the above description is only a description of the preferred embodiment of the present invention, and all extensions according to the technical means of the present invention Changes should also fall within the scope of the patent application for the present invention, and are hereby noted.

Claims (10)

1. A disposable anesthetic safe injection syringe, comprising a syringe containing a handle, a needle, a push rod and a safety protection sleeve, characterized in that: The syringe is an elongated hollow cylinder, which accommodates a drug tube, and a protrusion is arranged on the outer periphery of the front end of the syringe; A handle connected with the syringe, the front end of which is joined with the rear end of the syringe, a guide hole is provided at the rear end of the handle so that the rod body of the push rod can be inserted into the syringe to push the medicine The piston of the tube, which allows the medicine to be injected into the body; The push rod is a long rod body, its rear end has a buckle portion for the thumb to buckle in, and its front end forms a push end with a diameter slightly smaller than the medicine tube piston; The needle is a short cylinder of a double-ended needle; The safety protection sleeve is a lengthwise plastic tube body, and a guide groove is opened on the outer periphery of the safety protection sleeve relative to the protrusion of the syringe, and the guide groove has a front end and a rear end The guide groove is provided with a concave curved section at the entrance of the rear end, and after the curved section, an elastically deformable stopper and a locking groove arranged behind it are arranged to facilitate the injection of the syringe Before discarding after use, first pull the syringe back, let the protective sleeve protrude forward, and retract the needle, so that the protrusion on the syringe is guided by the guide groove from the front end. After entering the rear end, through the backward deformation feature of the deformation stopper, the projection on the syringe is locked in the locking groove so that the syringe can no longer be moved out, so as to ensure the safety of the injection syringe . 2. The disposable anesthetic safety injection syringe according to claim 1, characterized in that the bump is a triangular block, the block is high at the front and low at the back, so as to facilitate the assembly and positioning of the safety protection sleeve locking operation. 3 . The disposable anesthetic safety injection syringe according to claim 1 , wherein an elastic rubber ring is fitted on the pushing end of the push rod adjacent to the rear end. 4 . 4. The disposable anesthetic safe injection syringe according to claim 1, characterized in that the syringe, push rod and safety protection sleeve are made of plastic. 5 . The disposable anesthetic safe injection syringe according to claim 1 , wherein the rear end of the syringe has a male thread, and the front end has a small diameter portion of the male thread. 6 . 6. The disposable anesthetic safe injection syringe according to claim 5, characterized in that, the needle head is recessed toward one end of the syringe to form an inner screw hole, and the inner screw hole and the front end of the syringe have a male thread. The small diameter parts are screwed together. 7. The disposable anesthetic safety injection syringe according to claim 1, characterized in that, the inner diameter of the safety protection sleeve is slightly larger than the outer diameter of the syringe, so that the safety protection sleeve can be sleeved in the assembled The outer circumference of the needle and syringe. 8 . The disposable anesthetic safety injection syringe according to claim 1 , wherein the front end and the rear end of the guide groove are arranged in a straight line. 9 . The disposable anesthetic safety injection syringe according to claim 1 , wherein the elastically deformable stopper has a characteristic of substantially backward deformation. 10 . 10. The disposable anesthetic safe injection syringe according to claim 1, characterized in that the handle is a plastic hollow short cylinder with a large and small diameter portion, and the internal thread of the large diameter portion at the front end is screwed on the back of the syringe The male thread at the end has a guide hole at the small diameter part at the rear end, so that the rod body of the push rod can extend into the accommodating space of the syringe to push the piston of the medicament tube.

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