Foreign matter prevention syringe needle for dosing and syringe with foreign matter prevention syringe needle

Abstract

The invention relates to the technical field of syringe needles, in particular to a foreign matter prevention syringe needle for dosing and a syringe thereof.The foreign matter prevention syringe needle for dosing comprises a needle base and a needle rod fixed to the needle base, and the needle rod and the needle base are hollow to form a liquid conveying channel; one end of the liquid conveying channel is a connecting opening located in the needle base and used for being connected with a matched injector, the other end of the liquid conveying channel is a liquid inlet and outlet located in the needle rod, the end, away from the needle base, of the needle rod is a puncture tip, and a cutting edge is formed on the puncture tip. The included angle between the liquid inlet and outlet direction of the liquid conveying channel and the puncture direction of the syringe needle is not smaller than 90 degrees, foreign matter cannot be caused when the syringe needle punctures a bottle plug, and meanwhile the puncture force is saved. The probability that the needle rod is bent or broken off in the puncture process can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of syringes, in particular to a foreign body-proof syringe needle for dosing medicine and a syringe thereof. Background Art

[0002] There are two types of syringe needles on the market. One is a sharp beveled pillow syringe needle. Since it has both a cutting edge and a puncture tip, it is easy to puncture when puncturing rubber bottle stoppers for liquid extraction. However, since the liquid inlet and outlet directions of the syringe needle delivery channel are the same as the axial direction, it is easy to bring the solvent bottle stopper into the solvent liquid along with the drug solution, causing some trouble for clinical department nurses. At the same time, if it is a finished infusion of intravenous preparation, it will have a negative impact. The other is a syringe with a solid front end of a needle with a side hole. This syringe will not bring the bottle stopper into the solvent liquid. However, it only has a puncture tip for puncture and no cutting edge. Therefore, it is relatively blunt during puncture and requires increased force to add the drug solution to the solvent liquid. For clinical nurses and intravenous preparation nurses who add large amounts of medicine, using this syringe for a long time will undoubtedly cause damage to the wrists and fingers. Based on this phenomenon, the author wants to invent a syringe that has a sharp needle and will not bring the bottle stopper into the solvent liquid. Summary of the Invention

[0003] The invention provides a foreign body-proof syringe needle for dosing medicine and a syringe thereof. By modifying the syringe needle, foreign bodies are not generated when the syringe needle punctures a bottle stopper, and puncture force is saved.

[0004] The technical problem solved by the present invention is achieved by adopting the following technical solutions:

[0005] On the one hand, the present invention provides a foreign body-proof syringe needle for dosing medicine, comprising a needle seat and a needle rod fixed on the needle seat, wherein the needle rod and the needle seat are hollow inside to form a liquid delivery channel, one end of the liquid delivery channel is a connecting opening on the needle seat for connecting to an adapted syringe, and the other end of the liquid delivery channel is a liquid inlet and outlet on the needle rod, the end of the needle rod away from the needle seat is a puncture tip, and a cutting edge is formed on the puncture tip, and the angle between the liquid inlet and outlet direction of the liquid delivery channel and the puncture direction of the syringe needle is not less than degrees.

[0006] Preferably, the puncture tip is located in the axial direction of the needle rod.

[0007] Preferably, the puncture tip is solid, and the liquid inlet and outlet of the delivery channel are located on the side wall of the needle rod.

[0008] Preferably, the puncture tip is hollow, and the liquid inlet and outlet of the delivery channel are located on the side wall of the puncture tip.

[0009] Preferably, the cutting edges are evenly distributed circumferentially along the axis of the puncture tip.

[0010] Preferably, the puncture tip is in the shape of a cone with an arc groove on its surface, and the edge of the arc groove forms a cutting edge.

[0011] Preferably, the puncture tip is in the shape of a cone with ribs on the surface, and the outer side of the ribs forms a cutting edge.

[0012] Preferably, a shielding cover is provided on the outer side wall of the puncture tip at a position corresponding to the liquid inlet and outlet, and a gap is reserved between the edge of the shielding cover corresponding to the opposite direction of puncture and the outer side wall of the puncture tip.

[0013] Preferably, a recessed groove is provided on the outer side wall of the puncture tip at a position corresponding to the liquid inlet and outlet, and the recessed groove is a part of the gap.

[0014] On the other hand, the present invention provides a syringe comprising any one of the above-mentioned medicated anti-foreign object syringe needles and a syringe body, wherein the syringe body comprises a syringe barrel connectable to the syringe needle, and a handle having a piston and capable of driving the piston to slide inside the syringe barrel.

[0015] The beneficial effect of the present invention is that it can prevent foreign matter in the bottle stopper from entering the syringe needle during the puncture process by setting the angle between the liquid inlet and outlet directions of the liquid delivery channel and the syringe needle puncture direction to be no less than degrees.

[0016] By arranging the puncture tip in the axial direction of the needle rod, the probability of the needle rod bending or breaking during the puncture process can be reduced.

[0017] By arranging the liquid inlet and outlet of the delivery channel at the position of the puncture tip, it is easier to cleanly suck out the liquid inside the solvent bottle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 This is a structural diagram of the prior art 1 of the present invention;

[0020] Figure 2 This is a structural diagram of the second prior art of the present invention;

[0021] Figure 3 A schematic structural diagram of the first embodiment provided by the present invention;

[0022] Figure 4 Schematic diagram of the stress state of the syringe needle during the puncture process according to the first embodiment of the present invention;

[0023] Figure 5 A schematic structural diagram of a second embodiment of the present invention;

[0024] Figure 6 A schematic structural diagram of a third embodiment of the present invention;

[0025] Figure 7 A schematic structural diagram of a fourth embodiment of the present invention;

[0026] Figure 8 A schematic cross-sectional view of a fourth embodiment of the present invention;

[0027] Figure 9 For the present invention Figure 8 Schematic diagram of the enlarged structure at I in the middle;

[0028] Figure 10 A schematic structural diagram of a fifth embodiment of the present invention;

[0029] Figure 11 A schematic cross-sectional view of a fifth embodiment of the present invention;

[0030] Figure 12 The present invention provides Figure 11 Schematic diagram of the enlarged structure at G in the middle;

[0031] Figure 13 This is a schematic diagram of the structure of the syringe provided by the present invention.

[0032] In the figure, 1. needle seat; 2. needle rod; 201. puncture tip; 3. puncture part; 4. cutting edge; 5. liquid inlet and outlet; 6. arc groove; 7. convex rib; 8. shielding cover; 9. recessed groove; 10. syringe; 11. handle; 12. piston. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0034] refer to Figure 1 The first prior art configuration of a syringe needle, Figure 1 include Figure 1 a and Figure 1 b, where Figure 1 a is the overall structure of the syringe needle. Figure 1As can be seen from a, the first prior art structure of the syringe needle includes a needle seat 1 and a needle rod 2 with a liquid delivery channel formed therein. The liquid delivery channel is formed by the hollow interior of the needle seat 1 and the needle rod 2 (i.e., a hollow setting). This is easily understood by those skilled in the art. Common syringe needles are hollow inside to form a liquid delivery channel. The same structure will not be elaborated here and below. One end of the liquid delivery channel is a connecting opening on the needle seat 1, which is used to connect to the compatible syringe barrel. The other end of the liquid delivery channel is a liquid inlet and outlet 5 on the needle rod 2. Figure 1 In b, the direction of the liquid inlet and outlet 5 is the same as the axial direction of the needle rod 2. The end of the needle rod 2 away from the needle seat 1 is the puncture tip 201. The puncture tip 201 is composed of a bevel at one end of the needle rod 2, and the edge of the bevel forms a cutting edge 4. When puncturing a solution bottle with a stopper, the puncture tip 201 first pierces the stopper. As the person applies a puncture force along the direction of the needle rod 2 (generally, the puncture force is applied to the syringe needle through the syringe), the cutting edge 4 can cut the stopper during the puncture process, thereby facilitating the passage of the puncture tip 201. During the puncture process, the cooperation between the puncture tip 201 and the cutting edge 4 can make the puncture process very labor-saving. However, the syringe needle also has the following problems during use, that is, during the puncture process, the opening direction of the liquid inlet and outlet 5 is the same as the puncture direction, and it is easy for the stopper particles generated during the puncture process to enter the needle rod 2 through the liquid inlet and outlet 5.

[0035] refer to Figure 2 The second prior art configuration of a syringe needle is Figure 2 include Figure 2 a and Figure 2 b, where Figure 2 a is an overall schematic diagram of the second prior art syringe needle, which differs from the above-mentioned first prior art in that the puncture tip 201 of the needle rod 2 is a solid cone, and since the puncture tip 201 of the needle rod 2 is set to a cone, the puncture tip 201 does not have a cutting edge 4. In the process of puncturing the cork, since the diameter of the puncture tip 201 gradually increases, the force required in the puncture process becomes greater and greater, and the puncture process is more laborious. The second prior art is also different from the first prior art in that the liquid inlet and outlet 5 of the liquid delivery channel is opened on the side wall of the needle rod 2. Since the direction of the liquid inlet and outlet 5 opened on the side wall of the needle rod 2 is perpendicular to the puncture direction (90 degrees), that is, during the puncture process, the liquid inlet and outlet 5 does not produce positive pressure conflict with the cork, so it can greatly reduce the probability of cork particles entering the syringe needle during the puncture process.

[0036] Obviously, by combining the two prior arts provided above, it is easy to think of the following scheme, which is a schematic diagram of the structure of the first embodiment provided by the present invention. Figure 3 ,exist Figure 3 In the embodiment, the puncture tip 201 adopts the structure of the first prior art, which is a cutting edge 4 formed by an inclined surface. The puncture tip 201 is set to be solid, and then the liquid inlet and outlet 5 are opened on the side wall of the needle rod 2 in combination with the characteristics of the second prior art. In this way, it can ensure that the puncture tip 201 has a cutting edge 4 during the puncture process, thereby increasing the ability to break through the cork, and can make the direction of the liquid inlet and outlet 5 perpendicular to the puncture direction, thereby reducing the possibility of fine particles entering the syringe needle during the puncture of the cork.

[0037] Obviously, it is easy to think of combining the first embodiment provided by the present invention with the two prior arts. In order to further improve the first embodiment, reference is made to Figure 4 , which is a schematic diagram of the force structure of the first embodiment provided by the present invention during the process of puncturing a bottle stopper. Since the puncture tip 201 of the first embodiment has an inclined surface, it is first subjected to the puncture force applied by the person during the puncture process. As shown in the figure, the direction of F1 is along the direction of the axis. When the inclined surface contacts the bottle stopper, it is also subjected to the vertical direction force F2 applied by the bottle stopper to the inclined surface. As a result, the direction of the resultant force of the needle rod 2 deviates from the axis of the needle rod 2 during the puncture process. When the hardness of the needle rod 2 is insufficient, or the puncture force applied to the needle rod 2 in a short period of time is large, the direction of the resultant force is also large, which can easily cause the needle rod 2 to break or bend. Based on this problem, the present invention adopts the following solution to solve it.

[0038] refer to Figure 5-Figure 12 The present invention sets the puncture tip 201 at the position of the axis line of the needle rod 2 (that is, the axis of the conical puncture tip 201 mentioned below coincides with the axis line of the needle rod 2), so that during the puncture process, the direction of the resultant force acting on the needle rod 2 is on the axis line of the needle rod 2, thereby reducing the possibility of the needle rod 2 breaking or bending during the puncture process.

[0039] Specific reference Figure 5 This is the second embodiment provided by the present invention. In this embodiment, the puncture tip 201 of the syringe needle is a solid cone with multiple arc grooves 6 on the surface and a solid interior. The puncture portion 33 is the tip of the puncture tip 201. The edge of the arc groove 6 forms a cutting edge 4. The cutting edges 4 are evenly distributed circumferentially along the axis of the puncture tip 201. The liquid inlet and outlet 5 are arranged on the outer wall of the needle rod 2, thereby ensuring that during the puncture process, the puncture force applied to the syringe tip, the resistance encountered by the puncture tip 201, and the combined force direction of the multiple cutting edges 4 are in the axial direction of the needle rod 2, thereby avoiding the needle rod 2 being twisted by force during the puncture process, causing the needle rod 2 to bend or break.

[0040] Specific reference Figure 6 This is the third embodiment provided by the present invention. In this embodiment, the puncture tip 201 of the syringe needle is conical with a plurality of convex ribs 7 on the surface. The outer side of the convex rib 7 forms a cutting edge 4, and the cutting edge 4 is evenly distributed circumferentially along the axis of the puncture tip 201. The puncture tip 201 is solid, and the liquid inlet and outlet 5 are arranged on the needle rod 2. Since the plurality of cutting edges 4 are evenly distributed circumferentially along the axis of the puncture tip 201, it can also be ensured that the direction of the resultant force of the puncture tip 201 during the puncture process is in the direction of the axis.

[0041] Furthermore, since the liquid inlet and outlet 5 in the above embodiment is transferred from the original puncture tip 201 position to the outer wall of the needle rod 2, the purpose of reducing the probability of solid particle impurities in the cork entering the needle rod 2 during the puncture of the cork is achieved. However, when the syringe needle is inserted into the bottom of the solution bottle, since the liquid inlet and outlet 5 is on the needle rod 2, the liquid inlet and outlet 5 has a distance relative to the bottom of the solution bottle, which makes it difficult to completely aspirate the solution inside the solution bottle. To address this problem, in order to aspirate as much solution as possible from the solution bottle, the present invention adopts the following improvement method.

[0042] refer to Figure 7-Figure 9 FIG4 is a structural diagram of the fourth embodiment of the present invention, which mainly improves the syringe needle on the basis of the third embodiment. The difference from the third embodiment is that the liquid inlet and outlet 5 is changed from the one originally designed on the side wall of the needle rod 2 to at least one opened on the outer wall of the puncture tip 201, and the interior of the puncture tip 201 is also hollow and connected to the interior of the needle rod 2. Since the liquid inlet and outlet 5 is set on the outer wall of the puncture tip 201, the direction of the liquid inlet and outlet 5 and the puncture direction (the angle between the axial direction is less than 90 degrees) can easily cause particles of the bottle cork to enter the needle rod 2 during the puncture process. Therefore, the direction of the liquid inlet and outlet 5 is changed by setting a shielding cover 8 on the outer wall of the puncture tip 201, that is, a gap is reserved between the edge of the shielding cover 8 corresponding to the opposite direction of puncture and the outer wall of the puncture tip 201, as shown in FIG4. Figure 7 b and Figure 9 As shown in the figure, a gap is reserved between the edge of the shielding cover 8 close to the needle rod 2 and the puncture tip 201, and the remaining edges are sealed with the outer wall of the puncture tip 201. When the liquid is aspirated, the liquid enters the liquid inlet and outlet 5 through the gap, and then enters the syringe needle. Therefore, the direction of the liquid inlet and outlet 5 at this time is the busbar direction of the outer wall of the puncture tip 201 (also the direction of the liquid inlet and outlet 5 pointing to the gap), and the angle between it and the puncture direction and the axial direction of the needle rod 2 is greater than 90 degrees.

[0043] For further reference, Figure 10-12, which is the fifth embodiment provided by the present invention. The difference between this embodiment and the fourth embodiment is that since the gap is small, it may affect the suction speed of the needle, so the outer wall of the puncture tip 201 is provided with a recessed groove 9 corresponding to the position of the liquid inlet and outlet 5. The recessed groove 9 is part of the gap, which increases the size of the gap and makes it easier for the liquid to enter the syringe needle.

[0044] The fourth and fifth embodiments described above both arrange the liquid inlet and outlet 5 on the puncture tip 201 to achieve the effect of more easily sucking out the liquid in the solution bottle. Since the direction of the liquid inlet and outlet 5 is changed by the shielding cover 8 on the outside of the liquid inlet and outlet 5 so that the angle between its direction and the puncture direction is greater than 90 degrees, it is more effective in preventing particles from entering the needle shaft 2.

[0045] Of course, the liquid inlet and outlet 5 of the present invention can also be changed in direction by providing a shielding cover 8, so that the angle between the direction of the liquid inlet and outlet 5 and the puncture direction is greater than 90 degrees, thereby further preventing the liquid inlet and outlet 5 from facing the bottle stopper during the puncture process, causing small particles of impurities to enter the needle rod 2.

[0046] On the other hand, Figure 13 As shown, the present invention also provides a syringe, which includes a syringe body and a medicated anti-foreign object syringe needle of any of the above embodiments, wherein the syringe body includes a syringe barrel that can be connected to the syringe needle, and a handle 11 with a piston 12 that can drive the piston 12 to slide inside the syringe, and the syringe barrel and the syringe needle can be connected by plugging or fixedly.

[0047] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A syringe needle for dosing medication and preventing foreign matter, comprising a needle seat (1) and a needle rod (2) fixed on the needle seat (1), wherein the needle rod (2) and the needle seat (1) are hollow inside to form a liquid delivery channel, one end of the liquid delivery channel is a connecting opening on the needle seat (1) for connecting to an adapted syringe, and the other end of the liquid delivery channel is a liquid inlet and outlet (5) on the needle rod (2), the end of the needle rod (2) away from the needle seat (1) is a puncture tip (201), and a cutting edge (4) is formed on the puncture tip (201), characterized in that: The angle between the liquid inlet and outlet (5) directions of the liquid delivery channel and the puncture direction of the syringe needle is not less than 90 degrees.

2. The anti-foreign matter syringe needle for medication according to claim 1, characterized in that: The puncture tip (201) is located in the axial direction of the needle rod (2).

3. The foreign body-proof syringe needle for medication according to claim 1, characterized in that: The puncture tip (201) is solid, and the liquid inlet and outlet (5) of the delivery channel is located on the side wall of the needle rod (2).

4. The foreign body-proof syringe needle for medication according to claim 1, characterized in that: The puncture tip (201) is hollow, and the liquid inlet and outlet (5) of the delivery channel is located on the side wall of the puncture tip (201).

5. The foreign body-proof syringe needle for medication according to claim 1, characterized in that: The cutting edges (4) are evenly distributed circumferentially along the axis of the puncture tip (201).

6. The foreign body-proof syringe needle for medication according to claim 5, characterized in that: The puncture tip (201) is in the shape of a cone with an arcuate groove (6) on its surface as a whole, and the edge of the arcuate groove (6) forms a cutting edge (4).

7. The foreign body-proof syringe needle for medication according to claim 5, characterized in that: The puncture tip (201) is in the shape of a cone with a convex rib (7) on the surface as a whole, and a cutting edge (4) is formed on the outer side of the convex rib (7).

8. The foreign body-proof syringe needle for medication according to claim 4, characterized in that: A shielding cover (8) is provided on the outer wall of the puncture tip (201) at a position corresponding to the liquid inlet and outlet (5), and a gap is reserved between the edge of the shielding cover (8) corresponding to the opposite direction of puncture and the outer wall of the puncture tip (201).

9. The foreign body-proof syringe needle for medication according to claim 7, characterized in that: A recessed groove (9) is provided on the outer side wall of the puncture tip (201) at a position corresponding to the liquid inlet and outlet (5), and the recessed groove (9) is a part of the gap.

10. A syringe, characterized in that: The invention comprises a medicated anti-foreign matter syringe needle and a syringe body as described in any one of claims 1 to 9, wherein the syringe body comprises a syringe connectable to the syringe needle, and a handle (11) having a piston (12) and capable of driving the piston (12) to slide inside the syringe.

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