CN219646436U - Anti-drop anti-overflow safety syringe - Google Patents

Abstract

The utility model discloses an anti-falling and anti-overflow safety syringe, which comprises a syringe barrel, a piston type push rod and an anti-falling limiting piece; the front end of the injection tube is provided with a luer connector, and the rear part of the injection tube is provided with an opening; the front end of the piston type push rod is inserted into the injection cylinder through the opening, the front end of the piston type push rod is provided with a sealing piston, and the rear end of the piston type push rod is exposed out of the opening; the anti-falling limiting piece is fixedly arranged at the opening to clamp and fixedly limit the sealing piston so as to prevent the piston from falling back through the opening at the rear part of the injection tube. The effect is as follows: after the anti-drop limiting piece is arranged, the sealing piston is not extractable relative to the injection cylinder, and is not pulled backwards through the rear opening of the injection cylinder any more, so that the liquid medicine or the body fluid of a patient sucked in the injection cylinder is not easy to overflow from the rear opening of the injection cylinder, cross infection is not easy to occur, the needle head is in threaded connection with the luer connector, the connection firmness is good, the separation is not easy, and the liquid medicine or the body fluid of the patient sucked in the injection cylinder is not easy to overflow from the luer connector, so that the cross infection is not easy to occur.

Description

Anti-drop anti-overflow safety syringe

Technical Field

The utility model relates to the technical field of medical nursing products, in particular to an anti-falling and anti-overflow safety syringe.

Background

The syringe, as its name implies, is used for infusing the liquid medicine into the patient or drawing the apparatus of the body fluid (blood, abdominal cavity liquid or chest liquid, etc.) from the patient, it basically includes the front end has luer joints and the back forms the open syringe, but the piston push rod and pinhead that the back and forth movement set up in corresponding syringe, the front end of corresponding piston push rod will be equipped with the outer wall closely to the sealing piston of the inner wall of corresponding syringe, the back end of corresponding piston push rod is exposed in the back of corresponding syringe.

The syringe with the structure is widely used in various hospitals, but the inventor finds that the syringe has certain defects and shortcomings in use in the working process.

Specifically, on one hand, when the liquid medicine or the body fluid of a patient is pumped into the corresponding injection cylinder, the force of pulling the corresponding piston type push rod out of the corresponding injection cylinder needs to be controlled, when the pulling force is too large and too long, the corresponding sealing piston arranged at the front end of the corresponding piston type push rod is easy to be pulled out backwards from the rear opening of the corresponding injection cylinder, so that the liquid medicine or the body fluid of the patient pumped in the corresponding injection cylinder overflows from the rear opening of the corresponding injection cylinder, cross infection is easy to be caused, particularly when the corresponding injector is used for preparing the tumor liquid medicine, the overflow of the liquid medicine or the body fluid of the patient also has great potential safety hazards, and when the medical staff or the body of the patient is stained with the corresponding tumor liquid medicine, the harm to the body is great, and on the other hand, the needle is directly connected with the corresponding luer connector in a plugging manner, the problem that the plugging is not firm and easy to be loosened is easy to cause the overflow of the liquid medicine or the body fluid of the patient pumped in the corresponding injection cylinder through the luer connector.

In this regard, the present inventors have gradually conceived and designed the present utility model by combining clinical experience, through thinking about problems encountered in clinical work, browsing through a great deal of scientific research data and documents, and searching through the website of the national intellectual property office, to solve the relevant technical problems.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent. Therefore, the utility model aims to provide an anti-falling and anti-overflow safety syringe.

In order to achieve one of the above objects, according to an embodiment of the present utility model, an anti-drop and anti-overflow safety syringe includes a syringe, a piston type push rod, and an anti-drop stopper;

the front end of the injection tube is provided with a luer connector which is communicated with the inside of the injection tube forwards, and the rear part of the injection tube is formed to be open; the front end of the piston type push rod is inserted into the injection cylinder in a front-back movable way through the opening at the rear part of the injection cylinder, the front end of the piston type push rod is provided with a sealing piston with the outer wall tightly propped against the inner wall of the injection cylinder, and the rear end of the piston type push rod is exposed out of the opening at the rear part of the injection cylinder;

the anti-falling limiting piece is fixedly arranged at the rear opening of the injection cylinder so as to clamp and limit the sealing piston to prevent the sealing piston from falling back out through the rear opening of the injection cylinder.

In addition, the anti-falling and anti-overflow safety syringe according to the above embodiment of the present utility model may further have the following additional technical features:

according to one embodiment of the utility model, the sealing piston and the piston type push rod are coaxially arranged, the outer diameter of the sealing piston is larger than that of the piston type push rod, and the sealing piston is made of soft rubber materials.

According to one embodiment of the utility model, the anti-falling limiting piece comprises a sleeve with a front end formed into a sleeve opening and a holding lug A arranged on the periphery of the sleeve in a surrounding manner;

the sleeve is sleeved and fixed outside the opening at the rear end of the injection tube, and a circle of annular inner edge playing a role of stopping and limiting is arranged inwards at the rear part of the sleeve; the inner diameter of the annular inner edge is slightly larger than the outer diameter of the piston type push rod and smaller than the outer diameter of the sealing piston.

According to one embodiment of the utility model, the sleeve is threaded out of the rear end opening of the syringe barrel.

According to one embodiment of the utility model, the anti-drop limiting member further comprises an annular liquid absorbing sheet;

the annular liquid absorbing sheet is made of cotton materials, is fixedly attached to the inner surface of the annular inner edge, and is matched with the annular inner edge in size.

According to one embodiment of the utility model, the piston type push rod comprises a rod body and a holding lug B arranged at the rear part of the rod body; the holding lug B is detachably connected with the rod body.

According to one embodiment of the utility model, further comprising a needle; the rear end of the needle head is provided with a connecting seat, the rear part of the connecting seat is formed into a connecting port, and the luer connector comprises a plugging section positioned at the front end and a thread section positioned at the rear end; the connecting seat is spliced with the luer connector and screwed outside the threaded section.

According to one embodiment of the utility model, further comprising an annular wicking ring; the annular liquid suction ring is sleeved and fixed outside the connecting end of the threaded section; when the connecting seat is screwed outside the threaded section, the inner edge of the rear connecting port is tightly sleeved outside the annular liquid suction ring.

According to one embodiment of the utility model, the outer wall of the injection cylinder is provided with capacity scales from front to back, and an annular marking ring is arranged on the outer wall of the injection cylinder near the rear end of the outer wall of the injection cylinder, and the distance from the annular marking ring to the front end of the injection cylinder is twice the distance from the annular marking ring to the rear end of the injection cylinder.

The beneficial effects of the utility model are as follows:

in the first aspect, the anti-falling and anti-overflow safety syringe provided by the utility model is provided with the anti-falling limiting piece which is fixedly arranged at the rear opening of the injection cylinder and is used for clamping and limiting the sealing piston to prevent the sealing piston from falling back from the rear opening of the injection cylinder, that is, after the anti-falling limiting piece is arranged, the sealing piston is not extractable relative to the injection cylinder, and is not pulled backwards by force anyhow, so that the liquid medicine or the body fluid of a patient sucked in the injection cylinder is not easy to overflow from the rear opening of the injection cylinder, so that cross infection is not easy to be caused, and especially when the tumor liquid medicine is configured by the utility model, the configured tumor liquid medicine is not easy to overflow from the rear opening of the injection cylinder, so that a medical staff or a patient is not easy to be stained with corresponding tumor liquid medicine.

The second point is that the anti-falling limiting piece comprises a sleeve with a front end formed into a sleeve opening and a holding lug A arranged on the periphery of the sleeve in a surrounding manner; the sleeve is sleeved and fixed outside the opening at the rear end of the injection tube, and a circle of annular inner edge playing a role of stopping and limiting is arranged inwards at the rear part of the sleeve; the inner diameter of the annular inner edge is slightly larger than the outer diameter of the piston type push rod and smaller than the outer diameter of the sealing piston. Therefore, when the piston push rod is pushed and pulled back and forth, the annular inner edge does not affect the piston push rod to slide back and forth along the front and back direction of the injection cylinder, and because the inner diameter of the annular inner edge is smaller than the outer diameter of the sealing piston, the sealing piston cannot pass through the annular inner edge backwards, and the annular inner edge can play a role of stopping the sealing piston from sliding back out through the rear end opening of the injection cylinder, that is, in the utility model, the sealing piston is indeed non-extractable relative to the injection cylinder, and is pulled backwards by force anyhow, and does not deviate backwards through the rear end opening of the injection cylinder.

Third, when a certain amount of liquid medicine or body fluid of a patient needs to be pumped into the injection cylinder by using the utility model, the piston type push rod is pushed forward in advance, so that the sealing piston is positioned at the front part in the injection cylinder, then the piston type push rod is pulled backwards slowly, the sealing piston can be driven to slide backwards along the inside of the injection cylinder, so that the external liquid medicine or body fluid of the patient is pumped into the injection cylinder, when the sealing piston slides backwards along the injection cylinder and the rear part of the sealing piston is opened, the rear periphery of the sealing piston can be abutted against the inner surface of the annular liquid absorption sheet, even if a small amount of liquid medicine or body fluid of the patient overflows backwards from the rear periphery of the sealing piston, the overflowed small amount of liquid medicine or body fluid of the patient can be absorbed by the annular liquid absorption sheet, and finally the overflowed liquid medicine or body fluid of the patient is not easy to cause cross infection.

And the fourth point is that when the connecting seat is screwed outside the luer connector, the connection firmness between the needle head and the luer connector is good and the needle head is not easy to fall off. And even if a small amount of liquid medicine or body fluid of a patient overflows forwards from the luer connector, the overflowed small amount of liquid medicine or body fluid of the patient can be absorbed by the annular liquid absorption ring, so that cross infection caused by overflow is not easy to occur finally.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view showing the overall structure of an anti-drop and anti-overflow safety syringe according to the present utility model;

FIG. 2 is an exploded view of the anti-fall and anti-overflow safety syringe of the present utility model;

FIG. 3 is an enlarged view of E in FIG. 2;

FIG. 4 is an enlarged view of F in FIG. 2

Fig. 5 is an enlarged view of G in fig. 2;

reference numerals:

an anti-drop anti-spill safety syringe 1000;

a syringe 10;

luer fitting 101;

a plug section 1011;

a threaded section 1012;

a capacity scale 102;

an annular marker ring 103;

an external thread 104;

a piston type push rod 20;

a seal piston 201;

a rod body 20a;

screw head 20a1;

grip B20B;

screwing the sleeve 20b1;

an anti-drop limiting member 30;

a sleeve 301;

an annular inner edge 3011;

an internal thread 3012;

grip a302;

annular absorbent sheet 303;

a needle 40;

a connection base 401;

a liquid inlet and outlet port 402;

an annular liquid suction ring 50;

the achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below are exemplary and intended to illustrate the present utility model and should not be construed as limiting the utility model, and all other embodiments, based on the embodiments of the present utility model, which may be obtained by persons of ordinary skill in the art without inventive effort, are within the scope of the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings of the specification are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

First, a brief description will be given of the syringe.

The syringe, as its name implies, is used for infusing the liquid medicine into the patient or drawing the apparatus of the body fluid (blood, abdominal cavity liquid or chest liquid, etc.) from the patient, it basically includes the front end has luer joints and the back forms the open syringe, but the piston push rod and pinhead that the back and forth movement set up in corresponding syringe, the front end of corresponding piston push rod will be equipped with the outer wall closely to the sealing piston of the inner wall of corresponding syringe, the back end of corresponding piston push rod is exposed in the back of corresponding syringe.

A basic description of the inventive process of this patent will now be described.

The syringe with the structure is widely used in various hospitals, but the inventor finds that the syringe has certain defects and shortcomings in use in the working process.

Specifically, on one hand, when the liquid medicine or the body fluid of a patient is pumped into the corresponding injection cylinder, the force of pulling the corresponding piston type push rod out of the corresponding injection cylinder needs to be controlled, when the pulling force is too large and too long, the corresponding sealing piston arranged at the front end of the corresponding piston type push rod is easy to be pulled out backwards from the rear opening of the corresponding injection cylinder, so that the liquid medicine or the body fluid of the patient pumped in the corresponding injection cylinder overflows from the rear opening of the corresponding injection cylinder, cross infection is easy to be caused, particularly when the corresponding injector is used for preparing the tumor liquid medicine, the overflow of the liquid medicine or the body fluid of the patient also has great potential safety hazards, and when the medical staff or the body of the patient is stained with the corresponding tumor liquid medicine, the harm to the body is great, and on the other hand, the needle is directly connected with the corresponding luer connector in a plugging manner, the problem that the plugging is not firm and easy to be loosened is easy to cause the overflow of the liquid medicine or the body fluid of the patient pumped in the corresponding injection cylinder through the luer connector.

In this regard, the present inventors have gradually conceived and designed the present utility model by combining clinical experience, through thinking about problems encountered in clinical work, browsing through a great deal of scientific research data and documents, and searching through the website of the national intellectual property office, to solve the relevant technical problems.

The anti-drop and anti-spill safety syringe 1000 according to the embodiment of the present utility model is described in detail with reference to the accompanying drawings.

Referring to fig. 1 to 5, an anti-falling and anti-overflow safety syringe 1000 according to an embodiment of the present utility model includes a syringe 10, a piston push rod 20, and an anti-falling stopper 30;

wherein, the front end of the injection tube 10 is provided with a luer connector 101 communicated with the inside of the injection tube, and the rear part is formed to be open; the front end of the piston type push rod 20 is inserted into the injection cylinder 10 through the rear opening of the injection cylinder 10 in a front-back movable way, the front end of the piston type push rod 20 is provided with a sealing piston 201 with the outer wall tightly propped against the inner wall of the injection cylinder 10, and the rear end of the piston type push rod 20 is exposed out of the rear opening of the injection cylinder 10;

and, the said anti-disengaging limiting member 30 is fixedly arranged at the rear opening of the said injection tube 10, in order to block and limit the said seal piston 201 and prevent it from disengaging backward through the rear opening of the said injection tube 10.

Based on the above, it can be seen that the present utility model is mainly used as the anti-falling and anti-overflow safety syringe 1000 when it is implemented.

Specifically, when the present utility model is applied and assembled according to the above-described structure, when it is required to suck a certain amount of medicine or patient's body fluid into the syringe 10 using the present utility model, the piston plunger 20 is pushed forward in advance so that the sealing piston 201 is positioned at the front inside the syringe 10, and then the piston plunger 20 is pulled backward slowly, which drives the sealing piston 201 to slide backward along the inside of the syringe 10, so that external medicine or patient's body fluid is sucked into the syringe 10.

For the above operation, since the anti-drop limiting member 30 is provided in the present utility model and is fixedly disposed at the rear opening of the syringe 10, so as to clamp and limit the sealing piston 201 to prevent the sealing piston from being pulled out backward through the rear opening of the syringe 10, that is, after the anti-drop limiting member 30 is provided in the present utility model, the sealing piston 201 is not pulled backward by force, so that the liquid medicine or the body fluid sucked in the syringe 10 is not easy to overflow from the rear opening of the syringe 10, so that cross infection is not easy to be caused, especially when the tumor liquid medicine is configured by using the present utility model, the configured tumor liquid medicine is not easy to overflow from the rear opening of the syringe 10, so that a great potential safety hazard is not easy to exist, and the medical staff or the body is not easy to be stained with the corresponding tumor liquid medicine.

Furthermore, through the optimization design, the whole structure formed by the utility model has strong practicability and good use effect.

Further, in the embodiment, as shown in fig. 2 and 3, according to an embodiment of the present utility model, the sealing piston 201 and the piston rod 20 are coaxially disposed and connected to form a whole, the outer diameter of the sealing piston 201 is larger than the outer diameter of the piston rod 20, and the sealing piston 201 is made of soft rubber.

In this regard, it will be understood that, in the present utility model, the sealing piston 201 and the piston rod 20 with the above-mentioned structure and connection relationship are substantially the same as corresponding structural components on a conventional syringe, and not described in detail herein, the sealing piston 201 is made of soft rubber material, and its outer wall closely abuts against the inner wall of the syringe 10, so that the sealing performance of the front portion of the syringe 10 is good.

Still further, in the embodiment, as shown in fig. 2 and 3, according to an embodiment of the present utility model, the anti-falling limiting member 30 includes a sleeve 301 with a front end formed as a socket, and a grip a302 annularly disposed on the outer periphery of the sleeve 301;

wherein, the sleeve 301 is fixed outside the rear end opening of the injection tube 10, and a ring-shaped inner edge 3011 playing a role of stopping and limiting is arranged at the inner rear part of the sleeve 301 inwards in a ring manner; the annular inner rim 3011 has an inner diameter slightly larger than the outer diameter of the piston push rod 20 and smaller than the outer diameter of the sealing piston 201.

In this regard, it will be appreciated that since the inner diameter of the annular inner edge 3011 is slightly larger than the outer diameter of the plunger 20, the annular inner edge 3011 does not affect the plunger 20 to slide back and forth in the back and forth direction of the syringe 10 when the plunger 20 is pushed and pulled back and forth, and since the inner diameter of the annular inner edge 3011 is smaller than the outer diameter of the sealing piston 201, the sealing piston 201 cannot pass back through the annular inner edge 3011, and the annular inner edge 3011 can function to stop the sealing piston 201 from sliding back out through the rear end opening of the syringe 10.

That is, in the present utility model, the sealing piston 201 is indeed non-extractable with respect to the syringe 10, and it does not come out backward through the rear opening of the syringe 10, no matter how strongly pulled backward.

Preferably, in this embodiment, as still referring to fig. 2 and 3, according to an embodiment of the present utility model, the sleeve 301 is screwed out of the rear end opening of the syringe 10.

In this way, the sleeve 301 and the rear end of the syringe 10 are firmly connected, and are not easy to loose, so that the sealing piston 201 can be well limited in the syringe 10 to prevent the sealing piston from being released backward through the rear end of the syringe 10.

Further, as is apparent from the above description, the rear end outer wall of the syringe 10 of the present utility model is provided with the external screw thread 104, and the inner wall of the sleeve 301 of the present utility model is provided with the internal screw thread 3012 engaged with the external screw thread 104.

Further, in the embodiment, referring to fig. 2 and 3, according to an embodiment of the present utility model, the anti-falling limiting member 30 further includes an annular liquid absorbing sheet 303;

the annular liquid absorbing sheet 303 is made of cotton material, is adhered to the inner surface of the annular inner edge 3011, and has a size matched with the size of the annular inner edge 3011.

In this regard, it will be appreciated that when a certain amount of liquid medicine or body fluid of a patient needs to be sucked into the syringe 10 by using the present utility model, the piston push rod 20 is pushed forward in advance, so that the sealing piston 201 is located at the front portion of the syringe 10, and then the piston push rod 20 is pulled backward slowly, which can drive the sealing piston 201 to slide backward along the inside of the syringe 10, so as to suck the external liquid medicine or body fluid of the patient into the syringe 10, when the sealing piston 201 slides backward along the syringe 10 and the rear portion thereof is opened, the rear peripheral edge of the sealing piston 201 abuts against the inner surface of the annular liquid absorbing sheet 303, and even if a small amount of liquid medicine or body fluid of the patient overflows backward from the rear peripheral edge of the sealing piston 201, the overflowed small amount of liquid medicine or body fluid of the patient is absorbed by the annular liquid absorbing sheet 303, so that the overflowed liquid medicine or body fluid of the patient is not likely to overflow eventually cause cross infection.

Furthermore, through the optimization design, the whole formed by the utility model can effectively improve the use effect.

It should be noted that, in the implementation, referring to fig. 2, according to an embodiment of the present utility model, the piston rod 20 includes a rod body 20a and a grip B20B disposed at a rear portion of the rod body 20a; the grip B20B is detachably connected to the rod 20 a.

For the above-mentioned arrangement of the piston push rod 20 to include the rod body 20a and the detachable grip B20B fixed at the rear portion of the rod body 20a, the reason is that: before the assembly of the present utility model, the holding ear B20B and the rod body 20a may be detached to separate them, then the piston type push rod 20 and the sealing piston 201 at the front end thereof are inserted into the injection tube 10 from the back to the front through the rear opening of the injection tube 10, the rear end of the piston type push rod 20 is reserved to be exposed outside the rear opening of the injection tube 10, then the sleeve 301 is sleeved outside the rod body 20a from the rear end thereof, and is fixedly sleeved outside the rear opening of the injection tube 10, and finally the holding ear B20B and the rod body 20a are connected, thereby the present utility model can be assembled simply and rapidly.

For the related operation, the utility model is really simple, convenient and labor-saving to assemble when the utility model leaves a factory to assemble.

Preferably, in this technical solution, the rear end of the rod body 20a is provided with a screw head 20a1 rearward, and the front end surface of the grip lug B20B is provided with a screwing sleeve 20B1 that is screwed out of the screw head 20a1, so that the connection between the grip lug B20B and the rear end of the rod body 20a is good and not easy to be removed.

It should be further appreciated that in particular embodiments, and with reference to fig. 2 and 4, the present utility model further includes a needle 40 according to one embodiment of the present utility model; the rear end of the needle 40 is provided with a connecting seat 401 with a rear part formed into a connecting port, and the luer connector 101 comprises a plugging section 1011 positioned at the front end and a thread section 1012 positioned at the rear end; the connection seat 401 is plugged with the luer connector 101 and is screwed outside the threaded section 1012.

Thus, when the connection holder 401 is screwed on the outside of the thread section 1012, the connection between the needle 40 and the luer connector 101 is firm and not easy to be taken off.

Meanwhile, the luer connector 101 comprises the plugging section 1011 positioned at the front end and the threaded section 1012 positioned at the rear end, so the plugging section 1011 is convenient for being directly plugged and connected with a conventional injection needle, and the luer connector 101 has strong application adaptability and more flexible use.

Preferably, in this technical solution, with continued reference to fig. 2 and 4, according to one embodiment of the present utility model, the present utility model further comprises an annular absorbent ring 50; the annular liquid suction ring 50 is sleeved and fixed outside the connecting end of the thread section 1012 and is made of cotton material; when the connecting seat 401 is screwed on the outer side of the threaded section 1012, the inner edge of the rear connecting port is tightly sleeved on the outer side of the annular liquid suction ring 50.

Thus, even when a small amount of liquid medicine or body fluid of a patient overflows forward from the luer 101, the overflowed small amount of liquid medicine or body fluid of the patient is absorbed by the annular absorbent ring 50, so that cross infection is not likely to occur due to the overflow.

Furthermore, through the optimized design, the whole formed by the utility model can achieve the best use effect.

It should be further added that, in the embodiment, as shown in fig. 1 and 2, according to one embodiment of the present utility model, the outer wall of the syringe 10 is provided with a capacity scale 102 from front to back, and the outer wall of the syringe 10 is provided with an annular marking ring 103 near the rear end thereof, and the distance from the annular marking ring 103 to the front end of the syringe 10 is twice the distance from the rear end of the syringe 10.

Thus, it can be summarized that:

in one aspect, the volume scale 102 is used to provide a number of points in mind, even if the healthcare worker is able to know in real time the amount of medication or the amount of fluid in the syringe 10.

On the other hand, the annular marking ring 103 is arranged so that the distance from the annular marking ring 103 to the front end of the injection tube 10 is twice the distance from the annular marking ring to the rear end of the injection tube 10, and the main purpose is that for the arrangement of tumor liquid medicine, as industry regulations, the amount of the tumor liquid medicine sucked and arranged in the injection tube 10 is generally required to be about two thirds of the total volume in the injection tube 10 each time, so as to avoid cross infection and potential safety hazards caused by excessive overflow of the tumor liquid medicine sucked and arranged from the rear opening of the injection tube 10, so that the annular marking ring 103 provided by the utility model can play a good reference role, and when the distance from the annular marking ring to the front end of the injection tube 10 is twice the distance from the annular marking ring to the rear end of the injection tube 10, the capacity of the injection tube 10 is just two thirds of the total volume in the injection tube 10.

Thus, when the health care provider pulls the plunger 20 rearward and the front end of the sealing piston 201 moves rearward along the syringe 10 into alignment with the annular marking ring 103, it indicates that the amount of tumor fluid aspirated into the syringe 10 is about two-thirds of the total volume of the syringe 10, and at this time, the health care provider stops pulling the plunger 20 rearward.

In addition, in the embodiment of the present utility model, the syringe 10 is made of transparent plastic, and the annular mark 103 is preferably an annular concave ring etched on the outer wall of the syringe 10 or an annular indication line sprayed on the outer wall of the syringe 10, which may be a ring shape as long as it can serve as a reference.

Further, in the embodiment, referring to fig. 2 and 5, the front end of the needle 40 is shaped into a pointed sealing structure, and the outer wall of the needle 40 is provided with a liquid inlet and outlet hole 402 near the front end and communicating with the inside of the needle 40 according to one embodiment of the present utility model.

Thus, when the needle 40 pierces the soft rubber plug at the bottle mouth of the bottled liquid medicine, the front end of the needle 40 is shaped into a pointed closed structure, and the outer wall of the needle 40 is provided with the liquid inlet and outlet hole 401 communicated with the inside of the needle near the front end, so that the piercing effect is excellent, and the provided liquid inlet and outlet hole 401 is not easy to be blocked by the rubber scraps pierced by the corresponding soft rubber plug, so that the whole body formed by the utility model is excellent in use reliability.

Other embodiments, etc., are not illustrated herein.

In summary, in the embodiment of the anti-falling and anti-overflow safety syringe 1000 provided by the present utility model, since the anti-falling limiting member 30 is fixedly arranged at the rear opening of the syringe 10 and is used for clamping and limiting the sealing piston 201 to prevent the sealing piston from falling back out through the rear opening of the syringe 10, that is, after the anti-falling limiting member 30 is arranged in the present utility model, the sealing piston 201 is not extractable from the syringe 10, and is not pulled back by force anyway, so that the liquid medicine or the body fluid of the patient sucked in the syringe 10 is not easy to overflow from the rear opening of the syringe 10, so that cross infection is not easy to be caused, especially when the tumor liquid medicine is configured by the present utility model, the configured tumor liquid medicine is not easy to overflow from the rear opening of the syringe 10, so that a large safety hazard is not easy to exist, and the medical staff or the patient is not easy to be stained with the tumor liquid medicine.

In addition, since the anti-falling limiting member 30 includes a sleeve 301 having a front end formed as a socket, and a grip a302 annularly provided on the outer periphery of the sleeve 301; the sleeve 301 is fixedly sleeved outside the rear end opening of the injection tube 10, and a ring-shaped inner edge 3011 playing a role of stopping and limiting is arranged at the inner rear part of the sleeve 301 inwards in a ring manner; the annular inner rim 3011 has an inner diameter slightly larger than the outer diameter of the piston push rod 20 and smaller than the outer diameter of the sealing piston 201. Therefore, when the plunger 20 is pushed and pulled back and forth, the annular inner edge 3011 does not affect the sliding of the plunger 20 back and forth in the front-back direction of the syringe 10, and since the inner diameter of the annular inner edge 3011 is smaller than the outer diameter of the sealing piston 201, the sealing piston 201 cannot pass back through the annular inner edge 3011, and the annular inner edge 3011 can function to block the sealing piston 201 from sliding back out through the rear end opening of the syringe 10, that is, in the present utility model, the sealing piston 201 is surely non-extractable with respect to the syringe 10, and is surely not extractable back out through the rear end opening of the syringe 10 regardless of being forcefully pulled back.

Furthermore, when a certain amount of liquid medicine or body fluid of a patient needs to be sucked into the syringe 10 by using the present utility model, the piston push rod 20 is pushed forward in advance, so that the sealing piston 201 is positioned at the front part in the syringe 10, and then the piston push rod 20 is pulled backward slowly, so that the sealing piston 201 can be driven to slide backward along the inside of the syringe 10, so as to suck external liquid medicine or body fluid of the patient into the syringe 10, when the sealing piston 201 slides backward along the syringe 10 and the rear part of the sealing piston is opened, the rear periphery of the sealing piston 201 abuts against the inner surface of the annular liquid absorbing sheet 303, even if a small amount of liquid medicine or body fluid of the patient overflows backward from the rear periphery of the sealing piston 201, the overflowed small amount of liquid medicine or body fluid of the patient can be absorbed by the annular liquid absorbing sheet 303, so that cross infection is not easy to overflow finally.

Again, when the connection holder 401 is screwed on the threaded section 1012 of the luer connector 101, the connection between the needle 40 and the luer connector 101 is firm and is not easy to be removed. And even if a small amount of liquid medicine or body fluid of a patient overflows forward from the luer 101, the overflowed small amount of liquid medicine or body fluid of the patient is absorbed by the annular liquid absorbing ring 50, so that cross infection is not easily caused by the overflow.

Furthermore, the anti-falling and anti-overflow safety syringe 1000 provided by the utility model has extremely strong practicality and excellent use effect, so that the utility model has very good market popularization value, is very popular, and can be effectively popularized.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (9)

1. The anti-falling and anti-overflow safety syringe is characterized by comprising a syringe, a piston type push rod and an anti-falling limiting piece;

the front end of the injection tube is provided with a luer connector forwards, and the rear part of the injection tube is formed to be open; the front end of the piston type push rod is inserted into the injection cylinder in a front-back movable way through an opening at the rear part of the injection cylinder, the front end of the piston type push rod is provided with a sealing piston, the outer wall of the sealing piston tightly abuts against the inner wall of the injection cylinder, and the rear end of the piston type push rod is exposed out of the opening at the rear part of the injection cylinder;

the anti-falling limiting piece is fixedly arranged at the rear opening of the injection cylinder so as to clamp and fix the limiting sealing piston and prevent the piston from falling back out through the rear opening of the injection cylinder.

2. The anti-drop and anti-overflow safety syringe of claim 1, wherein the sealing piston is coaxially disposed with the piston ram and has an outer diameter greater than an outer diameter of the piston ram, and the sealing piston is made of a soft rubber material.

3. The anti-falling and anti-overflow safety syringe according to claim 2, wherein the anti-falling limiting member comprises a sleeve with a front end formed as a socket and a holding lug A arranged around the periphery of the sleeve;

the sleeve is sleeved and fixed outside the opening at the rear end of the injection tube, and a circle of annular inner edge playing a role of stopping and limiting is arranged inwards at the rear part of the sleeve; the inner diameter of the annular inner edge is slightly larger than the outer diameter of the piston type push rod and smaller than the outer diameter of the sealing piston.

4. A safety syringe according to claim 3, wherein the sleeve is threaded out of the rear opening of the barrel.

5. The anti-drop, anti-spill safety syringe of claim 3, wherein the anti-drop limiter further comprises an annular wicking tab;

the annular liquid absorbing sheet is made of cotton material and is fixedly attached to the inner surface of the annular inner edge, and the size of the annular liquid absorbing sheet is matched with the size of the annular inner edge.

6. The anti-falling and anti-overflow safety syringe according to claim 3, wherein the piston type push rod comprises a rod body and a holding lug B arranged at the rear part of the rod body; the holding lug B is detachably connected with the rod body.

7. The anti-fall and anti-overflow safety syringe of claim 1, further comprising a needle; the rear end of the needle head is provided with a connecting seat with a rear part formed into a connecting port, and the luer connector comprises a plugging section positioned at the front end and a thread section positioned at the rear end; the connecting seat is spliced with the luer connector and screwed outside the threaded section.

8. The anti-fall and anti-overflow safety syringe of claim 7 further comprising an annular liquid suction ring; the annular liquid suction ring is sleeved and fixed outside the connecting end of the threaded section; when the connecting seat is screwed outside the thread section, the inner edge of the connecting port at the rear part is tightly sleeved outside the annular liquid suction ring.

9. The anti-fall and anti-overflow safety syringe according to any one of claims 1 to 8 wherein the outer wall of the syringe is provided with a volume scale from front to back and the outer wall of the syringe is provided with an annular marking ring near its rear end, the annular marking ring being twice the distance from the front end of the syringe to the rear end of the syringe.