CN215537351U - Syringe capable of preventing needle-stick injury - Google Patents

Abstract

The embodiment of the utility model discloses an injector capable of preventing needle stick injuries, which belongs to the technical field of medical instruments and comprises a needle head, a needle cylinder, a pintle, a piston and a clamping structure, wherein the needle head is arranged at the front end of the needle cylinder, the piston is fixedly connected with one end of the pintle, the piston is arranged in the needle cylinder, the pintle is arranged at the rear end of the needle cylinder, and the needle head is connected with the piston through the clamping structure. The application innovatively adopts a clamping structure to establish the connection relation between the piston and the needle head. After the injection is finished, the pintle is pushed to drive the piston to move towards the needle head, the barb on the piston is close to the annular disc at the tail end of the needle head, the barb is hooked on the annular disc, the pintle is pulled outwards, and the needle head is driven to retract into the needle cylinder. By the arrangement, the needle head is retracted into the needle cylinder, the medical staff is prevented from being injured by the needle when placing the needle head in the sharps box, the operation is simple, the time for the medical staff to take the needle is saved, and the working efficiency of the medical staff is improved.

Description

Syringe capable of preventing needle-stick injury

Technical Field

The embodiment of the utility model relates to the technical field of medical instruments, in particular to a syringe capable of preventing needle stick injuries.

Background

Syringes are a common medical device. The current common syringe is composed of a needle, a syringe and a pintle, and mainly uses the needle to extract or inject gas or liquid. This process of drawing, injecting gas or liquid with a needle is called injection. The injector consists of a syringe with a small hole at the front end and a matched piston core rod, and is used for injecting a small amount of liquid or extracting the liquid or the liquid from the inaccessible area by other methods, wherein the liquid or gas is sucked from the small hole at the front end of the syringe when the core rod is pulled out, and the liquid or gas is extruded when the core rod is pushed in. Syringes may also be used for injection through rubber septa in medical devices, containers, scientific instruments such as in some chromatography.

The injector is widely used in clinic, after a nurse uses the injector, the needle needs to be placed in a sharps box, a needle plug of a needle cylinder is damaged and placed in medical waste, and the following problems mainly exist in the clinic application: needle stick injuries occur; the clinical work is busy, and when a nurse puts the needle head into the sharps box, the needle can be injured due to improper operation; when some nurses make mistakes during busy hours, the nurses forget to place the needles in a classified manner, so that potential safety hazards appear; needle stick injuries or improperly handled blood-carrying needles are prone to disease transmission.

Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide a novel syringe capable of preventing a person from being punctured by a needle.

SUMMERY OF THE UTILITY MODEL

Therefore, the embodiment of the utility model provides a syringe capable of preventing a needle from being punctured, so as to solve the problem that medical staff needs to pull out a needle to cause the needle to be punctured in the prior art.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

the utility model provides a prevent that acupuncture hinders syringe, includes syringe needle, cylinder, pintle, piston and joint structure, the syringe needle is established the front end of cylinder, the piston with pintle one end fixed connection, the piston is located inside the cylinder, the pintle is established the rear end of cylinder, the syringe needle pass through the joint structure with the piston is connected.

Further, the joint structure includes annular disc and barb, the annular disc is located the syringe needle rear end, just the annular disc with syringe needle fixed connection, the barb is equipped with two, two the barb is located the piston front end, and two the barb symmetry sets up, the barb joint is in the annular disc.

Further, the annular disc comprises an inner annular disc and an outer annular disc, the diameter of the inner annular disc is larger than that of the rear end of the needle head, and the diameter of the outer annular disc is larger than that of the inner annular disc.

Furthermore, a thickened area is arranged on the needle cylinder and is arranged at the front end of the needle cylinder, an annular groove is arranged in the thickened area, the position of the annular groove corresponds to the position of the barb, and the annular groove is in a hook shape;

still include intermediate layer, butt piece and derivation district, the ring channel inner circle is equipped with the intermediate layer, the intermediate layer uses the syringe needle axle center to set up as the center, the syringe needle outside is equipped with the butt piece, the butt piece rotates to set up in the intermediate layer, the intermediate layer is equipped with the confession outward the derivation district that the butt piece derived.

Furthermore, the annular disc is also provided with a radial beam, and the inner annular disc is connected with the outer annular disc through the radial beam.

Furthermore, the joint of the needle head and the needle cylinder is sleeved with a rubber pad, and the rubber pad is extruded between the needle head and the needle cylinder.

Furthermore, the pintle is provided with a breaking area, and the breaking area is positioned at the front end of the pintle.

Further, the barb is the iron wire material.

The embodiment of the utility model has the following advantages:

the application innovatively adopts a clamping structure to establish the connection relation between the piston and the needle head. After the injection is finished, the pintle is pushed to drive the piston to move towards the needle head, the barb on the piston is close to the annular disc at the tail end of the needle head, the barb is hooked on the annular disc, the pintle is pulled outwards, and the needle head is driven to retract into the needle cylinder. By the arrangement, the needle head is retracted into the needle cylinder, the medical staff is prevented from being injured by the needle when placing the needle head in the sharps box, the operation is simple, the time for the medical staff to take the needle is saved, and the working efficiency of the medical staff is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

FIG. 1 is a cross-sectional view of the present invention prior to injection;

FIG. 2 is a cross-sectional view of the present invention during injection;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a left side view of the thickened region;

FIG. 5 is a cross-sectional view of the needle retraction after injection in accordance with the present invention;

FIG. 6 is a top plan view of the needle and annular disc;

in the figure:

1, a needle head; 2, a needle cylinder; 3, needle-tying; 4, a piston; 5, a clamping structure; 501 an annular disc; 5011 inner ring disc; 5012 an outer ring disc; 502 barbs; 6 a thickening region; 7, an annular groove; 8, a radial beam; 9, a rubber pad; 10 breaking off the area; 11 an interlayer; 12 an abutment member; 13 a lead-out zone.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the utility model will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the utility model and that it is not intended to limit the utility model to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to solve the related technical problems existing in the prior art, the embodiment of the application provides an injector capable of preventing a needle from being punctured, aiming at solving the problems that the existing medical care personnel are easy to be punctured by the needle and the like during the operation, realizing the retraction of the needle 1 to the needle cylinder 2 and preventing the medical care personnel from being punctured by the needle 1. Referring to fig. 1-6, the syringe specifically comprises a needle 1, a syringe 2, a pintle 3, a piston 4 and a clamping structure 5, wherein the needle 1 is arranged at the front end of the syringe 2, a circular hole is arranged at the front end of the syringe 2, and the needle 1 can slide in the syringe 2 through the circular hole. When the needle head 1 is in a normal use state, the needle head 1 is fixed at the front end of the needle cylinder 2; when the disposable safety syringe is used and needs to be abandoned, the needle head 1 is passively retracted into the needle cylinder 2, so that medical personnel are prevented from being stabbed by the needle head 1 when abandoned, and the risk of infection of an operator is reduced. The joint of the needle head 1 and the needle cylinder 2 is sleeved with a rubber pad 9, and the rubber pad 9 is extruded between the needle head 1 and the needle cylinder 2. Since the needle 1 is not integral with the barrel 2, there is a risk of leakage between the needle 1 and the barrel 2. The rubber pad 9 is arranged between the needle head 1 and the needle cylinder 2, and prevents the liquid medicine in the needle cylinder 2 from flowing out, thereby avoiding polluting the outer surface of the injector and avoiding the waste of medicines. Meanwhile, the rubber pad 9 plays a role in fixing the needle head 1 on the needle cylinder 2, and the needle head 1 is prevented from moving in the injection process to influence the injection of a patient.

Piston 4 and 3 one end fixed connection of pintle, promotion pintle 3 drives piston 4 and removes, and inside 2 diameters of cylinder were located to piston 4, piston 4 diameter size was close with 2 diameter sizes of cylinder, and piston 4 card is inside 2 cylinders, and only when pulling pintle 3, piston 4 just can remove along with the removal of pintle 3, and pintle 3 establishes the rear end at cylinder 2. When the syringe extracts the liquid medicine from the medicine, the needle head 1 is inserted into the medicine, the pintle 3 is pulled to move outwards, and the liquid medicine is extracted into the needle cylinder 2 through the pressure difference. When medical personnel injects the liquid medicine to the patient, the needle cylinder 2 is flicked firstly, the pintle 3 is pushed slightly, some liquid medicine is extruded outwards through the needle head 1, air in the needle cylinder 2 is emptied, and the air is prevented from being brought into the subcutaneous or intradermal space, so that the phenomena of skin distending pain, unsmooth blood flow, oxygen deficiency and malnutrition of the patient are prevented. After the preparation is completed, the pintle 3 is pushed into the needle cylinder 2, and the piston 4 slowly pushes the liquid medicine to be injected into the patient through the needle 1.

The needle 1 is connected with the piston 4 through a clamping structure 5. The clamping structure 5 comprises an annular disc 501 and barbs 502, the annular disc 501 is arranged at the rear end of the needle 1, the annular disc 501 is fixedly connected with the needle 1, the barbs 502 are two, the two barbs 502 are arranged on the piston 4, the two barbs 502 are symmetrically arranged, and the barbs 502 are clamped in the annular disc 501. The annular disc 501 and the barb 502 are utilized to establish the connection relation between the needle head 1 and the piston 4, the upper barb 502 and the lower barb 502 are caught on the annular disc 501, the annular disc 501 can be firmly caught, the pintle 3 drives the piston 4 to move, the barb 502 on the piston 4 catches on the annular disc 501 to drive the needle head 1 fixedly connected with the annular disc 501, and therefore the movement of the pintle 3 drives the movement of the needle head 1. The needle head 1 can lock the outward movement of the pintle 3 and move towards the inside of the needle cylinder 2, so that the needle head 1 can be completely retracted into the needle cylinder 2, and the medical staff is prevented from being hurt by the exposed needle head 1.

The annular disc 501 comprises an inner annular disc 5011 and an outer annular disc 5012, the diameter of the inner annular disc 5011 is larger than that of the rear end of the needle 1, the diameter of the outer annular disc 5012 is larger than that of the inner annular disc 5011, a radial beam 8 is further arranged on the annular disc 501, and the inner annular disc 5011 is connected with the outer annular disc 5012 through the radial beam 8. The inner ring disc 5011 is fixedly connected with the rear end of the needle 1, the outer ring disc 5012 is sleeved on the inner ring disc 5011, the radial beams 8 are radially distributed between the inner ring disc 5011 and the outer ring disc 5012, the connection relation between the inner ring disc 5011 and the outer ring disc 5012 is established, when the barb 502 is close to the annular disc 501, the barb 502 penetrates through a gap between the two radial beams 8, the outer ring disc 5012 is grabbed, and therefore the whole annular disc 501 is grabbed. When the barb 502 moves, the annular disc 501 is first rotated, thereby moving the needle 1. When the pintle 3 moves towards the outside of the needle cylinder 2, the barb 502 drives the needle 1 to move towards the inside of the needle cylinder 2, and when the needle 1 is completely arranged inside the needle cylinder 2, the movement is stopped, so that the needle 1 is kept inside the needle cylinder 2. The needle head 1 is retracted into the needle cylinder 2, so that the needle head 1 after use is prevented from stabbing operators, and the operators are prevented from being infected.

The needle cylinder 2 is provided with a thickened area 6, and the thickened area 6 is arranged at the front end of the needle cylinder 2. The thickened area 6 is provided with an annular groove 7, the position of the annular groove 7 corresponds to the position of the barb 502, and the annular groove 7 is in a hook shape. In the prior art, after the injection of the syringe is completed, the medical staff needs to take down the needle 1 of the syringe, so that the medical staff is easily stabbed by the operation, the risk of infection of the medical staff is increased, and the workload is large. The utility model retracts the needle head 1 into the syringe 2 passively, thereby avoiding the occurrence of puncture, infection and the like. After the liquid medicine is injected into the body of a patient, the piston 4 on the pintle 3 extrudes towards the annular disc 501 at the rear end of the needle head 1, the barb 502 on the piston 4 moves towards the annular groove 7 of the thickened area 6, and the barb 502 changes the original shape after entering the annular groove 7. The barb 502 conforms to the shape of the annular groove 7 and the barb 502 becomes hook-shaped. After the barbs 502 are deformed, the pintle 3 is pulled outward, whereupon the hook-type barbs 502 on the piston 4 pass through the radial beams 8 and grip the outer annular disc 5012, thereby gripping the entire annular disc 501. The pintle 3 drives the needle head 1 to move towards the inside of the needle cylinder 2 until the whole needle head 1 is arranged in the needle cylinder 2. By the arrangement, the normal use of the injector is not influenced, and the needle head 1 can be retracted into the needle cylinder 2, so that the medical care personnel can be prevented from being hurt by the exposed needle head 1.

In order to prevent the needle from falling off when contacting skin, the annular groove 7 is internally provided with the interlayer 11, the interlayer 11 is arranged by taking the axis of the needle 1 as the center, the outer side of the needle 1 is provided with the abutting piece 12, the abutting piece 12 is rotatably arranged in the interlayer 11, and the guiding area 13 for guiding the abutting piece 12 out is arranged outside the interlayer 11. Therefore, when injecting the liquid medicine, because butt 12 and syringe needle 1 fixed connection, through the barrier effect of intermediate layer 11, make syringe needle 1 remain stable and can not deviate from in advance, after the injection is accomplished, barb 502 combines with annular disc 501, then rotate pintle 3 and drive annular disc 501 and rotate, annular disc 501 rotates and drives butt 12 and uses the central axis of syringe needle 1 to take place the rotation as the axle, butt 12 rotates behind derivation district 13, pull pintle 3 again and make piston 4 drive annular disc 501 outwards to draw, thereby retract syringe needle 1 in syringe 2.

The pintle 3 is provided with a breaking-off region 10, and the breaking-off region 10 is located at the front end of the pintle 3. The breaking-off region 10 is in an inverted triangle shape and can be broken off by slight force. When the needle head 1 retracts into the needle cylinder 2, the breaking area 10 on the needle bolt 3 is broken off, so that the needle bolt 3, the piston 4 and the needle head 1 are arranged in the needle cylinder 2, the needle bolt 3 cannot be pushed outside the needle cylinder 2, the needle head 1 is prevented from sliding out, medical staff is further prevented from being punctured, and the safety of an operator is protected.

Barb 502 is the iron wire material. The iron wire has certain hardness, can maintain specific shape, and the iron wire can buckle, can change original shape. When the piston 4 on the pintle 3 is not close to the needle 1, the barb 502 maintains the existing shape, and the barb 502 is in the direction extending to the annular groove 7 of the thickened area 6; when the pintle 3 is slowly pressed into the barrel 2, the barbs 502 on the plunger 4 enter the annular groove 7, are bent into a hook shape, and remain in the hook shape. The annular disc 501 is convenient to hook, the needle head 1 is retracted into the needle cylinder 2, and the operator is prevented from being punctured and infected.

The application process of the embodiment of the utility model is as follows:

the pintle 3 is drawn outwards, after the medicine liquid is extracted from the medicine through the syringe, the needle head 1 is inserted into the subcutaneous part of the patient, and the pintle 3 is slowly pushed into the needle cylinder 2, so that the medicine liquid is input to the patient. When the pintle 3 is pushed inwards, the piston 4 on the pintle 3 is extruded towards the annular disc 501 at the rear end of the needle 1, the barb 502 on the piston 4 moves towards the annular groove 7 of the thickened area 6, and after the barb 502 enters the annular groove 7, the barb 502 is changed into a hook type. At this point, the patient is finished injecting and the injector is detached from the patient's skin. The clinician pulls the pintle 3 outward, at which point the hook-type barbs 502 on the piston 4 catch the entire annular disc 501. The pintle 3 drives the needle head 1 to move towards the inside of the needle cylinder 2 until the whole needle head 1 is arranged in the needle cylinder 2. The normal use of the syringe is not influenced, and the needle head 1 can be retracted into the needle cylinder 2, so that the medical care personnel can be prevented from being hurt by the exposed needle head 1.

Although the utility model has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the utility model. Accordingly, such modifications and improvements are intended to be within the scope of the utility model as claimed.

Claims (8)

1. The utility model provides a prevent that acupuncture hinders syringe, its characterized in that, includes syringe needle, cylinder, pintle, piston and joint structure, the syringe needle is established the front end of cylinder, the piston with pintle one end fixed connection, the piston is located inside the cylinder, the pintle is established the rear end of cylinder, the syringe needle pass through the joint structure with the piston is connected.

2. The needle stick injury prevention syringe of claim 1 wherein the snap-fit structure comprises an annular disc and two barbs, the annular disc is arranged at the rear end of the needle head and fixedly connected with the needle head, the two barbs are arranged at the front end of the piston and symmetrically arranged, and the barbs are snapped in the annular disc.

3. The needle stick injury resistant syringe of claim 2 wherein the annular discs comprise an inner annular disc and an outer annular disc, the inner annular disc having a diameter greater than the diameter of the rearward end of the needle and the outer annular disc having a diameter greater than the diameter of the inner annular disc.

4. The needle stick injury prevention syringe of claim 3 wherein a thickened area is provided on the needle cylinder and is provided at the front end of the needle cylinder, the thickened area is provided with an annular groove, the position of the annular groove corresponds to the position of the barb, and the annular groove is in a hook shape;

still include intermediate layer, butt piece and derivation district, the ring channel inner circle is equipped with the intermediate layer, the intermediate layer uses the syringe needle axle center to set up as the center, the syringe needle outside is equipped with the butt piece, the butt piece rotates to set up in the intermediate layer, the intermediate layer is equipped with the confession outward the derivation district that the butt piece derived.

5. A needlestick injury prevention syringe as claimed in claim 4 in which the annular discs are further provided with radial beams, the inner disc being connected to the outer disc by radial beams.

6. The needle stick injury prevention syringe of claim 5 wherein a rubber pad is sleeved at the junction of the needle and the barrel, the rubber pad being squeezed between the needle and the barrel.

7. The needle-stick-injury preventing syringe of claim 6, wherein the needle stopper is provided with a breaking region, and the breaking region is located at a front end of the needle stopper.

8. The needle stick injury resistant syringe of claim 7 wherein the barb is of wire material.

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