CN216725427U

CN216725427U - Closed syringe

Info

Publication number: CN216725427U
Application number: CN202122916321.4U
Authority: CN
Inventors: 赵平均; 闫钧; 李风光; 于洋; 朱政辉; 邓杰
Original assignee: Henan Shuguang Huizhikang Biotechnology Co ltd
Current assignee: Henan Shuguang Huizhikang Biotechnology Co ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-06-14
Anticipated expiration: 2031-11-25

Abstract

The closed syringe includes syringe, needle fixed in the front of the syringe, lower protecting sleeve outside the needle seat of the needle, upper protecting sleeve over the lower protecting sleeve and capable of sliding up and down relatively, isolating plug fixed to the outer end of the upper protecting sleeve, and needle point with hole sealed inside the isolating plug. Compared with the prior art, the utility model discloses a technological effect does: the utility model discloses be equipped with upper and lower sheath and isolation stopper, needle tubing needle point trompil mouth carries out liquid medicine suction and transfer process at the syringe and is in all the time for airtight state, and the needle tubing needle point is kept apart with air on every side all the time when configuration liquid medicine and transfer liquid medicine to the emergence of above-mentioned problem has been solved.

Description

Closed syringe

Technical Field

The utility model relates to a closed type injector.

Background

At present, a disposable sterile syringe is a common apparatus in the medical industry, and is used for dissolving liquid medicine in a penicillin bottle, sucking the dissolved liquid medicine into the syringe, and transferring the dissolved liquid medicine into a liquid medicine bottle (or bag) through the syringe to carry out intravenous infusion.

The intravenous infusion dosage mode of most of domestic hospitals adopts the traditional dosage mode: sucking a proper amount of injection by using a syringe with a needle, upwards extruding a rubber plug of a penicillin bottle mouth by a needle tip inclined plane, then vertically arranging a needle cylinder, puncturing the rubber plug, injecting the injection, oscillating until the injection is completely dissolved, and then transferring the injection into a liquid medicine bottle (or bag) for intravenous infusion. Due to time and space constraints, the dispensing process is usually performed in an open treatment room with an imperfect air purification device. However, for high-risk drugs, such as chemotherapeutic drugs, e.g. antibiotics, anti-tumor drugs, etc., these drugs are cytotoxic drugs, if leakage occurs, local red swelling and pain will appear in the human body, if the leakage amount is large, swelling will even occur, local necrosis or limb necrosis of human tissues will occur, which will cause serious harm to the body of medical care personnel. In addition, because the needle point opening hole of the needle tube can be exposed in air in the liquid medicine transferring process, air can easily enter the cavity of the injector through the needle point opening hole of the needle tube to react with the medicine, so that the medicine is invalid or the life of a patient is dangerous. The dispensing mode can cause great harm to medical staff and patients.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem who solves: how to reduce the chance of exposure of the syringe needle to air before and after dispensing and before injection.

The technical scheme of the utility model specifically does:

the closed syringe includes syringe, needle fixed in the front of the syringe, lower protecting sleeve outside the needle seat of the needle, upper protecting sleeve over the lower protecting sleeve and capable of sliding up and down relatively, isolating plug fixed to the outer end of the upper protecting sleeve, and needle point with hole sealed inside the isolating plug.

The front end of the upper sheath is provided with a protective cap.

A pressure spring is sleeved outside a needle tube of the needle, one end of the pressure spring is fixed on the upper sheath, and the other end of the pressure spring is fixed at the lower end of the lower sheath.

The isolation plug is an elastomer, and the upper end part of the isolation plug extends to the outer side of the upper sheath to form an external convex part.

The isolating plug is provided with a linear gap.

The bottom of the isolating plug is provided with a conical groove.

Compared with the prior art, the utility model discloses a technological effect does: the utility model discloses be equipped with upper and lower sheath and isolation stopper, needle tubing needle point trompil mouth carries out liquid medicine suction and transfer process at the syringe and is in all the time for airtight state, and the needle tubing needle point is kept apart with air on every side all the time when configuration liquid medicine and transfer liquid medicine to the emergence of above-mentioned problem has been solved.

Drawings

Fig. 1 is a schematic diagram of the present invention.

Fig. 2 is an enlarged schematic view (a) of the sealing portion of the present invention.

Fig. 3 is an enlarged schematic view (ii) of the sealing portion of the present invention.

Fig. 4 is a schematic bottom view of the isolator plug.

Fig. 5 is a schematic cross-sectional view of an isolation plug.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments thereof.

Referring to fig. 1-2, a closed type injector comprises an injector 10, a needle 12 is fixed at the front part 11 of the injector 10, a lower sheath 20 is fixed outside the needle seat of the needle 12, an upper sheath 22 is arranged above the lower sheath 20, the upper sheath 22 and the lower sheath 20 can slide up and down relatively, a separation plug 23 is fixed at the outer end part of the upper sheath 22, the needle point of the needle 12 is sealed in the separation plug 23, the needle point part is inserted in the separation plug 23 before the needle 12 is used after being installed, so that a lower closed space is formed between the needle tube and the inner cavity of the injector.

As shown in figure 1, the front end of the upper sheath 22 is provided with a protective cap 30, which can ensure the front end part of the isolation plug 23 contacted with the rubber plug of the liquid medicine bottle to be in a sterile state before the syringe is used, thereby preventing bacterial contamination.

When dispensing, sucking or pushing liquid medicine and transferring liquid medicine, in order to facilitate the backward movement of the needle head, a pressure spring 21 is sleeved outside the needle tube of the needle head 12, one end of the pressure spring 21 is fixed on an upper sheath 22, and the other end is fixed at the lower end of a lower sheath 20.

Referring to fig. 2, to facilitate sealing engagement with the vial, the septum 23 is an elastomer (e.g., silicone rubber) having an upper end portion extending outside the upper sheath 22 to form an outer protrusion 235.

Referring to fig. 4, in order to facilitate the needle 12 to pass through the isolating plug 23, the isolating plug 23 is provided with a linear slit 231. The linear slit is processed by cutting the isolation plug 23 horizontally once with a knife to form a linear slit 231 (but because the isolation plug has elasticity, the isolation plug is still in a closed state after being cut), and the isolation plug is generally made of rubber, silicon rubber or polyethylene pentadiene material.

As shown in FIG. 5, to facilitate guiding the needle cannula into the septum cap 23, the bottom of the septum cap 23 is provided with a tapered groove 232 that facilitates movement of the needle cannula into and out of the septum cap 23.

The working principle is as follows:

when dispensing, the syringe is used to suck the liquid medicine into the syringe. As shown in fig. 1-2, the protective cap 30 is pulled out, the isolating plug 23 is pressed against the stopper of the medicine bottle, the external protrusion 235 is squeezed and contracted towards the needle 12, so as to ensure that the isolating plug 23 is in sealing fit with the stopper, the hand holds the syringe 10 to push forwards, so that the syringe 10, the needle 12 and the upper sheath 22 move forwards, the lower sheath 20 does not move, and the compression spring 21 is compressed, as shown in fig. 3. After the isolating plug is tightly contacted with the bottle stopper and pressed, the needle 12 penetrates through the isolating plug 23 and the bottle stopper to achieve the purpose of sucking medicine in the medicine bottle and sucking medicine liquid into the injector. The needle point part is always isolated from the air in the moving process.

Another hand pulls the plunger of the syringe 10 rearwardly and the medical fluid enters the syringe 10, which is known in the art and will not be described further.

After the medicine is sucked, the injector 10 is far away from the medicine bottle under the thrust of the pressure spring 21, the isolating plug and the bottle plug are still in a sealed state under the thrust action of the pressure spring 21, and the needle point of the needle 12 enters the isolating plug 23 to be sealed through the medicine bottle plug. The medicine bottle stopper and the isolating plug 23 are always in close contact, and the medicine bottle stopper and the isolating plug 23 do not slowly leave until the needle tube is completely withdrawn into the isolating plug. So that the opening at the tip of the needle 12 remains isolated from the atmosphere.

When transferring the liquid medicine in the syringe to other liquid medicine bags or bottles, the isolating plug 23 is pressed against the bottle stopper of the medicine bottle. The push rod of the injector is pushed to move forwards, and the pressure spring 21 is compressed in the pushing and pressing process to enable the isolating plug 23 to be in close contact with the rubber plug of the medicine bottle. At the moment, the needle tube is ejected out from the isolating plug 23 to puncture the bottle stopper of the medicine bottle and enter the medicine bottle, and the liquid medicine in the injector is pushed into the medicine bottle (or the liquid medicine bag), so that the liquid medicine transfer process is realized, and the connection with intravenous infusion can be carried out.

When the injection is carried out with a human body, the isolating plug 23 is abutted to the body of the patient, the injector 10 is held by a hand to be pushed forwards, the injector 10, the needle head 12 and the lower sheath 20 move forwards, the upper sheath 22 does not move, meanwhile, the pressure spring 21 is compressed, as shown in figure 3, after the isolating plug is tightly contacted with the skin, the straight needle head 12 penetrates through the isolating plug 23 and the needle head of the needle head 12 to reach the body of the patient, and the injection is carried out.

Finally, the syringe 10 is moved away from the patient by the urging of the compression spring 21, and the tip of the needle 12 is returned to the inside of the septum 23.

In the whole process, the orifice of the needle point of the needle head 12 is always positioned inside the sealed isolating plug 23 or in the inner cavity of the liquid medicine bottle, so that the problem that the orifice of the needle point of the needle tube is exposed in the air is solved, the liquid medicine in the injector cannot pollute medical care personnel due to leakage, on the other hand, the surrounding air cannot pollute the injected liquid medicine through the needle tube, the contact time of the liquid medicine and the surrounding air is stopped, the failure of the liquid medicine is avoided, and the medical harm is brought to a patient.

The closed needle tube can also be used on other types of liquid medicine transferors.

The closed needle of the patent is not limited to the needle tube being a bevel needle tube and a side hole needle tube.

The characteristics of this patent:

1. before and after dispensing and the through hole of the injection needle and the needle tube are in a closed state;

2. during the dispensing process, a sealed state is formed by the isolating plug to puncture the rubber plugs of the liquid medicine bottle, then the needle tube punctures the liquid medicine bottle again to dispense medicine, and the opening of the needle tube is always in a sealed state and is not contacted with the outside air;

3. after the injector dispenses and sucks the medicine, the needle tube is always in a sealed state when passing through the liquid bottle glue and the isolating plug, and an opening of the needle tube is not exposed in the air;

4. the method is also used when the liquid medicine in the syringe is injected and transferred to other liquid medicine bottles, so that the risk that the liquid medicine is polluted when the needle head of the syringe is exposed in the air in the process of dispensing and transferring the liquid medicine is solved.

See the prior art for additional details.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the general inventive concept, and it is intended to cover all such changes and modifications as fall within the true spirit and scope of the invention.

Claims

1. An enclosed syringe comprising a syringe (10) and a needle (12) fixed to a front portion (11) of the syringe (10), characterized in that: a lower sheath (20) is fixed outside the needle seat of the needle head (12), an upper sheath (22) is arranged above the lower sheath (20), the upper sheath (22) and the lower sheath (20) can relatively slide up and down, an isolation plug (23) is fixed at the outer end part of the upper sheath (22), and the opening of the needle point of the needle head (12) is sealed in the isolation plug (23).

2. The hermetically sealed injector of claim 1 wherein: the front end of the upper sheath (22) is provided with a protective cap (30).

3. The enclosed injector of claim 2, further comprising: a pressure spring (21) is sleeved outside a needle tube of the needle head (12), one end of the pressure spring (21) is fixed on the upper sheath (22), and the other end of the pressure spring is fixed at the lower end of the lower sheath (20).

4. The hermetically sealed injector of claim 3 further comprising: the isolation plug (23) is an elastomer, and the upper end part of the isolation plug extends to the outer side of the upper sheath (22) to form an external convex part (235).

5. The hermetically sealed injector of claim 4 further comprising: the isolating plug (23) is provided with a linear gap (231).

6. The enclosed injector of claim 5, wherein: the bottom of the isolating plug (23) is provided with a conical groove (232).