CN111450355A - An anti-needle stick syringe that can be prefilled with medicine - Google Patents

Abstract

The invention relates to a needle-prick prevention injector capable of pre-loading medicine, which comprises a needle cylinder, a needle head, a plunger piston and a needle head cap; the needle head comprises a double-ended needle and a tail sleeve, the tail sleeve is sleeved on the outlet of the needle cylinder, and a sealing membrane is arranged in the outlet of the needle cylinder; the front end of the needle cylinder is provided with a matching part of a circular wall structure, and the matching part is provided with an external thread; the inner wall of the needle head cap is provided with an internal thread matched with the external thread and can be covered outside the matching part in a threaded manner, and a convex structure is arranged inside the needle head cap along the central axis. The anti-needle-stick injury syringe capable of being preloaded with the medicine can be used for rapid and quantitative accurate administration, has the safety protection function of preventing needle-stick injury, is suitable for self-rescue and mutual rescue and analgesia administration of wounded persons or rapid analgesia administration of rescue persons in emergency situations, and is also suitable for injecting preloaded vaccine for preventing infectious diseases such as new crown pneumonia and the like.

Description

An anti-needle stick syringe that can be prefilled with medicine

technical field

The invention belongs to the technical field of medical devices, and in particular relates to a needle-stick injury prevention syringe that can be prefilled with medicine.

Background technique

Severe pain is one of the most common symptoms of war-trauma wounded. A large number of studies have shown that the early pain of war-trauma has a huge impact on the body's physiology, psychology and rehabilitation. Rapid analgesic administration. At present, conventional injectable analgesics are difficult to complete in the first-line treatment of the wounded. It is necessary to extract the drug from the ampoule bottle into the syringe and then inject it intramuscularly on the battlefield. The operation steps are complicated, time-consuming, and sterile. Other environmental requirements are high, and rigid needles are used in emergency situations, which are likely to cause collateral casualties. At present, the automatic injection equipment developed for civilian use is mostly used for blood sugar control, tumor drug administration, etc., but has not been used in pain control drugs, and there are problems such as precision components, complex structure, and high cost. It needs to be optimized and improved for the battlefield environment.

In addition, the recent outbreak of new crown pneumonia is raging, and vaccines are urgently needed for active prevention. If the vaccine is successfully developed, not only a large number of ampoules but also a large number of syringes are required, and the dispensing process is cumbersome and the amount of inoculation needs to be strictly controlled. The risk of overdose, then, if the dosage form allows, can a syringe that can be prefilled with vaccine can be developed to achieve the convenience, efficiency and precision of the vaccination work, and the syringe has no complex mechanical structure, and the production cost is low , while saving the packaging cost of ampoules.

Chinese patent CN105617488A (application number CN201610149886.5) discloses a disposable pre-filled medical liquid pressing emergency syringe, which consists of an outer sleeve, a middle sleeve, a double-ended needle, an inner push plug, a push rod, and a compressible drug storage device. sac composition. The front end of the middle sleeve is fixed with a double-ended needle, and the front end of the outer sleeve and the front end of the compressible medicine storage bag fixed to the front end of the inner push plug are all provided with small holes covered with soft glue, which can be penetrated by the double-ended needle from the inside and the inside, respectively. External puncture, the storage bag is pre-stored with first aid liquid. Although this invention patent satisfies the drug pre-filling function, it cannot guarantee the safety settings such as precise dosing.

Chinese patent CN206499729U (application number CN201621166350.6) discloses a fixed-speed quantitative rescue syringe. The syringe includes a syringe body, a syringe needle and a deceleration device. The deceleration device is arranged in the middle of the syringe body and is connected with the The syringe body is movably connected; the syringe needle is movably connected with the syringe body; wherein the syringe body accommodates a fixed dose of a pharmaceutical solution. The invention patent solves the problems of pre-filled drugs and decelerated drug delivery, but it is not suitable for use with analgesic drugs, and needs to achieve the purpose of rapid drug delivery.

SUMMARY OF THE INVENTION

Therefore, in view of the technical problem of the lack of a syringe capable of fast and quantitatively accurate drug delivery in the prior art, the purpose of the present invention is to provide a prefilled drug syringe for fast and quantitatively accurate drug delivery, and has anti-needle stick injuries It is suitable for self-rescue and mutual rescue analgesia for the wounded or rapid analgesia for rescue personnel in emergency situations.

The anti-needle puncture syringe that can be prefilled with medicine of the present invention comprises a barrel, a needle and a plunger, and is characterized in that it further comprises a needle cap;

The needle head comprises a double-ended needle and a tail sleeve, the tail section of the double-ended needle is inserted into the tail sleeve and the end is close to the sleeve opening of the tail sleeve, and the tail sleeve is sleeved on the outlet of the needle cylinder , the outlet of the syringe is provided with a sealing membrane;

The front end of the syringe is provided with a matching portion with a ring wall structure, the matching portion is surrounded by the periphery of the outlet of the syringe, and the needle cap is screwed or clamped on the inside or outside of the matching portion to cover the needle, The inside of the needle cap is provided with a protruding structure along the central axis, and the protruding structure is provided with a hole for the double-ended needle to pass through;

When the needle cap is screwed backwards, the protruding structure contacts the tail sleeve and pushes the tail sleeve to be completely sleeved on the needle barrel outlet, and at the same time the tail end of the double-ended needle can be pierced Thread the closure film.

Preferably, the matching portion is provided with an external thread; the inner wall of the needle cap is provided with an internal thread matching the external thread and can be screwed to cover the outside of the matching portion.

Preferably, it also includes a plurality of dose limiting pieces, each of which includes a vertical portion and a transverse portion that are connected as a whole, and the vertical portion is a post for being clamped on the plunger rod. Slot structure, the transverse part is a sheet-like structure for blocking the tail of the needle cylinder.

Preferably, the peripheral edge of the sleeve mouth of the tail sleeve is provided with an annular protrusion; the inner wall of the matching portion is provided with a positioning ring, the positioning ring is used for the positioning of the needle, and the position setting standard of the positioning ring is: the When the tail sleeve is over the outlet of the needle cylinder and the annular protrusion does not pass over the positioning ring, the double-ended needle does not pierce the sealing membrane; when the annular protrusion passes over the positioning ring, the The double-ended needle pierces the sealing membrane.

Preferably, the number of said dose limiting tablets is two or more, preferably three.

Preferably, the outer wall of the barrel is provided with a scale.

Preferably, the matching portion is composed of two semicircular walls, and a gap is left between the two semicircular walls.

Preferably, the outer surface of the needle cap is provided with anti-skid patterns.

Preferably, the anti-skid lines are axial protrusions.

Preferably, the front end of the needle cap is spherical, and the protruding structure protrudes outward.

The principle of the anti-needle puncture syringe that can be prefilled with medicine of the present invention is as follows:

In the initial state, the medicine is closed and stored in the syringe, the outlet of the syringe is closed with the sealing film before use, and the needle cap is lost when the needle cap is rotated to leak the needle at the front end of the double-ended needle. The raised structure provided on the top pushes up the needle to pierce the sealing membrane, and then the injection can be performed without additional operation, which is convenient and quick. During injection, the lowermost dose limiting piece can be removed, and the plunger can be pushed for drug injection. When the remaining dose limiting piece is against the end of the syringe, the quantitative injection of the drug is completed, and the The dose-limiting tablet is used to limit the injection volume of the drug, which is convenient, fast and precise. Multiple dose-limiting tablets can be graded for removal and injection for different patients and situations. For example, when analgesic administration is performed, the administration function of the drug dose can be adjusted according to the pain score: according to the pain degree score, different administration doses can be selected for mild, moderate and severe. In addition, the three-level pull-out dosing setting can play a reminder function to prevent repeated dosing, which is convenient for remembering the previous dose.

The prefilled syringe of the present invention can be used for rapid and quantitatively accurate administration, suitable for self-rescue and mutual rescue analgesia for the wounded or rapid analgesic administration for rescue personnel in emergency situations, and also suitable for pre-filled vaccines for preventing infections such as new coronary pneumonia injection of vaccines. Has the following functional advantages:

1. Drug preset function: The syringe barrel can be pre-filled with liquid medicine, and there is no need to extract the liquid medicine during the operation, which can avoid pollution and achieve the purpose of rapid drug administration.

2. The administration function of the adjustable drug dose: For example, in pain control, different administration doses can be selected according to the pain degree score, mild, moderate and severe. In vaccine injection, it can also be set according to the vaccine dose. In addition, the three-level pull-out dosing setting can play a reminder function to prevent repeated dosing, which is convenient for remembering the previous dose.

3. Safety protection function against stab wounds: The needle is built into the syringe, and the needle is displayed by rotating to prevent accidents such as stab wounds.

In addition, the needle body is moderate in size, suitable for holding and pressing, the injection action is simple, and can be completed with one hand, which is convenient for the injured to inject the medicinal liquid by himself. failure occurs.

Description of drawings

Fig. 1 is the preliminary test state schematic diagram of the anti-needle puncture syringe of the present invention that can be prefilled with medicine;

Fig. 2 is the injection state schematic diagram of the anti-needle stick injury syringe of the present invention that can be prefilled with medicine;

Fig. 3 is the disassembled schematic diagram of the anti-needle stick syringe of the present invention that can be prefilled with medicine;

4 is a partial schematic view of the disassembly of the needlestick-injury-resistant syringe that can be prefilled with medicine of the present invention;

Fig. 5 is the partial sectional view of the preliminary test state of the anti-needle stick syringe that can be prefilled with medicine of the present invention;

FIG. 6 is a partial cross-sectional view of the injection state of the prefilled medicament-preventable needle stick syringe of the present invention.

reference number

Syringe 1, syringe outlet 11, sealing membrane 12, matching part 13, positioning ring 131; needle 2, double-ended needle 21, tail sleeve 22, annular protrusion 221; plunger 3, dose limiting piece 4, vertical Toward part 41 , transverse part 42 , needle cap 5 , raised structure 51 , anti-slip pattern 52 .

Detailed ways

The present invention will be further described below with reference to specific embodiments. It should be understood that the following examples are only used to illustrate the present invention and not to limit the scope of the present invention.

Example 1

Figures 1 to 3 show a needle-stick injury-proof syringe that can be prefilled with a drug according to a preferred embodiment of the present invention, which includes a syringe 1, a needle 2, a plunger 3, a dose limiting piece 4 and a needle cap 5 .

Each dose limiting piece 4 includes a vertical portion 41 and a horizontal portion 42 that are connected as a whole. The vertical portion 41 is a column groove structure for being clamped on the rod portion of the plunger 3, and the horizontal portion 42 is used to block the syringe 1. The lamellar structure of the tail.

As shown in FIGS. 4-6 , the needle 2 includes a double-ended needle 21 and a tail sleeve 22. The tail section of the double-ended needle 21 is inserted into the tail sleeve 22 and the end is close to the sleeve opening of the tail sleeve 22. The tail sleeve 22 is sleeved on the tail sleeve 22. On the syringe outlet 11 , a sealing membrane 12 is arranged in the syringe outlet 11 .

The front end of the syringe 1 is provided with a matching portion 13 with a ring wall structure. The matching portion 13 surrounds the outer periphery of the syringe outlet 11 and is composed of two semicircular walls with a gap between the two semicircular walls. The matching portion 13 is provided with an external thread; the inner wall of the needle cap 5 is provided with an internal thread that matches the external thread and can be screwed to cover the outside of the matching portion 13, and the inside of the needle cap 5 is provided with a raised structure 51 along the central axis, and the raised structure 51 There is a hole for the double-ended needle 21 to pass through; the outer surface of the needle cap 5 is provided with an anti-slip pattern 52, and the anti-slip pattern 52 is axially convex. The front end of the needle cap 5 is spherical, and the protruding structure 51 protrudes outward.

When the needle cap 5 is screwed backwards, the protruding structure 51 contacts the tail sleeve 22 and pushes the tail sleeve 22 to be completely sleeved on the syringe outlet 11 , and the tail end of the double-ended needle 21 can pierce the sealing membrane 12 .

Preferably, an annular protrusion 221 is provided on the peripheral edge of the sleeve opening of the tail sleeve 22; a positioning ring 131 is disposed on the inner wall of the matching portion 13, and the positioning ring 131 is used for the positioning of the needle. On the syringe outlet 11 and when the annular protrusion 221 does not cross the positioning ring 131, the double-ended needle 21 does not pierce the sealing membrane 12 (see FIG. 5); when the annular protrusion 221 crosses the positioning ring 131, the double-ended needle 21 pierces Sealing membrane 12 (see Figure 6).

Preferably, the outer wall surface of the needle cylinder 1 is provided with a scale.

The principle of the anti-needle puncture syringe that can be prefilled with medicine of the present invention is as follows:

The initial state is shown in Figures 1 and 5, the medicine is stored in the syringe 1 closed, the syringe outlet 11 is closed with the sealing film 12 before use, when the needle cap 5 is rotated to make the needle at the front end of the double-ended needle 21 leak, the needle The protruding structure 51 provided on the cap 5 pushes the needle up to pierce the sealing membrane 12, as shown in Fig. 2 and Fig. 6, and then injection can be performed without additional operation, which is convenient and quick. When performing injection, the lowermost dose limiting sheet 4 can be removed, and the plunger 3 can be pushed to inject the drug. When the remaining dose limiting sheet 4 is against the tail of the syringe 1, the quantitative injection of the drug is completed. The dose-limiting tablet 4 is used to limit the injection volume of the drug, which is convenient, quick and precise. A plurality of dose-limiting tablets 4 can be removed and injected in stages for different patients and situations. For example, when administering analgesia, the administration function of the drug dose can be adjusted according to the pain score: according to the pain degree score, different administration doses can be selected for mild, moderate and severe. In addition, the three-level pull-out dosing setting can play a reminder function to prevent repeated dosing, which is convenient for remembering the previous dose.

The prefilled syringe of the present invention can be used for rapid and quantitatively accurate administration, suitable for self-rescue and mutual rescue analgesia for the wounded or rapid analgesic administration for rescue personnel in emergency situations, and also suitable for pre-filled vaccines for preventing infections such as new coronary pneumonia injection of vaccines. Has the following functional advantages:

1. Drug preset function: The syringe barrel can be pre-filled with liquid medicine, and there is no need to extract the liquid medicine during the operation, which can avoid pollution and achieve the purpose of rapid drug administration.

2. The administration function of the adjustable drug dose: For example, in pain control, different administration doses can be selected according to the pain degree score, mild, moderate and severe. In vaccine injection, it can also be set according to the vaccine dose. In addition, the three-level pull-out dosing setting can play a reminder function to prevent repeated dosing, which is convenient for remembering the previous dose.

3. Safety protection function against stab wounds: The needle is built into the syringe, and the needle is displayed by rotating to prevent accidents such as stab wounds.

In addition, the needle body is moderate in size, suitable for holding and pressing, the injection action is simple, and can be completed with one hand, which is convenient for the injured to inject the medicinal liquid by himself. failure occurs.

The preferred embodiments of the present invention have been specifically described above, but the present invention is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the present invention , these equivalent modifications or substitutions are all included within the scope defined by the claims of the present application.

Claims (10)

1. A needle stick injury-proof syringe that can be prefilled with medicine, comprising a syringe, a needle and a plunger, and characterized in that it also comprises a needle cap; The needle head comprises a double-ended needle and a tail sleeve, the tail section of the double-ended needle is inserted into the tail sleeve and the end is close to the sleeve opening of the tail sleeve, and the tail sleeve is sleeved on the outlet of the needle cylinder , the outlet of the syringe is provided with a sealing membrane; The front end of the syringe is provided with a matching portion with a ring wall structure, the matching portion is surrounded by the periphery of the outlet of the syringe, and the needle cap is screwed or clamped on the inside or outside of the matching portion to cover the needle, The inside of the needle cap is provided with a protruding structure along the central axis, and the protruding structure is provided with a hole for the double-ended needle to pass through; When the needle cap is screwed backwards, the protruding structure contacts the tail sleeve and pushes the tail sleeve to be completely sleeved on the needle barrel outlet, and at the same time the tail end of the double-ended needle can be pierced Thread the closure film. 2 . The anti-needle puncture syringe that can be prefilled with medicine according to claim 1 , wherein the matching portion is provided with an external thread; the inner wall of the needle cap is provided with an internal thread matching the external thread and It can be screwed to cover the outside of the mating portion. 3 . The anti-needle puncture syringe that can be prefilled with medicine according to claim 1 , further comprising a plurality of dose limiting sheets, each of which comprises a vertical portion that is connected as a whole. 4 . and a transverse part, the vertical part is a column groove structure for clamping the plunger rod part, and the transverse part is a sheet-like structure for blocking the tail part of the syringe. 4 . The anti-needle puncture syringe that can be prefilled with medicine according to claim 1 , wherein the peripheral edge of the sleeve mouth of the tail sleeve is provided with an annular protrusion; the inner wall of the matching portion is provided with a positioning ring, and the The positioning ring is used for the positioning of the needle head, and the position setting standard of the positioning ring is as follows: when the tail sleeve is placed on the outlet of the needle cylinder and the annular protrusion does not pass over the positioning ring, the double-ended needle is not pierced. through the sealing membrane; when the annular protrusion passes over the positioning ring, the double-ended needle pierces the sealing membrane. 5 . The anti-needle puncture syringe that can be prefilled with medicine according to claim 1 , wherein the quantity of the medicine quantity limiting pieces is more than two. 6 . 6 . The anti-needle puncture syringe that can be prefilled with medicine according to claim 1 , wherein the outer wall surface of the barrel is provided with a scale. 7 . 7 . The anti-needle puncture syringe that can be prefilled with medicine according to claim 1 , wherein the matching portion is composed of two semicircular walls, and a gap is left between the two semicircular walls. 8 . 8 . The anti-needle puncture syringe that can be prefilled with medicine according to claim 1 , wherein the outer surface of the needle cap is provided with anti-slip patterns. 9 . 9 . The anti-needle puncture syringe that can be prefilled with medicine according to claim 8 , wherein the anti-slip pattern is an axial protrusion. 10 . 10 . The anti-needle puncture syringe that can be prefilled with medicine according to claim 1 , wherein the front end of the needle cap is spherical, and the protruding structure protrudes outward. 11 .

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