Five-bevel needle tube

Abstract

A five-bevel needle tube, comprising a multi-bevel tip provided with one first bevel, two second bevels, and two third bevels. The first bevel has a first inclination angle of 9°±2° relative to the central axis and a first rotation angle of 0°. The five-bevel needle tube is characterized in that: the two second bevels serve as main cutting surfaces extending from the base to the apex of the multi-bevel tip and are symmetrically arranged, intersecting at the apex to form a second edge line with a needle point; the second bevel has a second inclination angle of 12°±2° and a second rotation angle of 45°±5°; the two third bevels are located at the middle portion of the multi-bevel tip and are symmetrically arranged; each of the third bevels intersects with one second bevel to form a third edge line, with the third bevel positioned on the lateral side of the second bevel. The third bevel has a third inclination angle of 11°±2° and a third rotation angle of 70°±5°. The described solution improves upon existing five-bevel needle tips, minimizing pain sensation during skin puncture by the needle tip.

Description

Five bevelled needle cannula TECHNICAL FIELD

[0001] The present invention belongs to the technical field of medical needles, and particularly relates to a five bevelled needle cannula. The five bevelled needle cannula has a multi-bevelled tip with a novel shape, which can further reduce the pain of puncture compared with the conventional needle cannula. BACKGROUND

[0002] Various types of needles are used in the medical field to deliver injectable medications into the body of a human or animal through the skin, or to insert a needle through the skin of a human or animal for blood collection and other medical and research purposes. For example, patients often use pen needles to inject insulin for the treatment of diabetes.

[0003] One end of a pen needle tip has a needle cannula tip for penetrating the skin of a patient for injection, and the other end is connected to an injection pen for delivering the medication. Among them, different needle cannula tip shapes may require more or less force to pierce the skin during injection, and when the needle tip puncture force is large, the pain increases, and when the needle tip puncture force is small, the pain is lower. At the same time, studies have shown that the pain experienced by the patient during needle insertion is caused by the skin tissue being cut by the beveled edge at the tip of the needle and then the tissue being pulled by the needle tip. The smoother the transition between the different bevels of the tip of the needle, the smoother the cutting and pulling action of the tip of the needle.

[0004] Chinese patent CN107847685A discloses a five bevelled cannula for a blood collection device, i.e. a five bevelled needle cannula. The multi-bevelled tip of the needle cannula comprises a main bevel, two intermediate bevels and two end bevels; the first inclination angle formed by the main bevel is between 8° and 12°, the second inclination angle formed by the intermediate bevel is between 15° and 20°, and the third inclination angle formed by the end bevel is greater than the second inclination angle, wherein the second rotation angle formed by the intermediate bevel is equal to the third rotation angle formed by the end bevel, and the length of the two end bevels is 15% to 30% of the total length of the multi-bevelled tip. This scheme can effectively reduce the puncture force and thus alleviate the pain, but since the third inclination angle and the second inclination angle are relatively large with respect to the first inclination angle, the inclination angle of the edge formed by the intersection of the two end bevels is also relatively large, so that the needle tip has a relatively large puncture resistance when it initially pierces the skin. Moreover, since the length of the end bevel is 15% to 30% of the total length of the multi-bevelled tip, the effective outer diameter of the intermediate bevel portion cannot be minimized during the entire piercing process of the multi-bevelled tip, and therefore the pain of the patient cannot be minimized.

[0005] Therefore, how to design a five bevelled needle cannula to minimize the pain is a problem to be solved by the present invention. SUMMARY

[0006] The present application provides a five-bevel needle tube, which aims to reduce the pain caused by the multi-bevel tip when piercing the skin to the greatest extent.

[0007] To achieve the above-mentioned purpose, the first technical solution adopted by the present application is: a five-bevel needle tube, comprising: a needle tube having a central axis, one end of the needle tube is provided with a multi-bevel tip, and the multi-bevel tip is provided with an opening for fluid output or injection, and a first bevel, two second bevels and two third bevels are arranged around the opening.

[0008] The multi-bevel tip is defined as having a tip portion, a middle portion and a base portion, the tip portion is located at the front end of the multi-bevel tip, the base portion is located at the rear end of the multi-bevel tip, and the middle portion is located between the front end and the rear end.

[0009] A plane passing through the central axis of the needle tube and symmetrically bisecting the needle tube is defined as a first reference plane, and a plane passing through the central axis of the needle tube and perpendicular to the first reference plane is defined as a second reference plane.

[0010] The first bevel is located at the base portion of the multi-bevel tip, and the first bevel is symmetrically arranged with the first reference plane as the reference; the first bevel has a first inclination angle relative to the central axis, and the first bevel has a first rotation angle relative to the second reference plane with the central axis as the rotation axis, and the first rotation angle is 0°.

[0011] The innovation of the present application lies in:

[0012] The two second bevels extend from the base portion of the multi-bevel tip to the tip portion, and the two second bevels are symmetrically arranged with the first reference plane as the reference between each other, one end of each of the two second bevels intersects with the first bevel to form two first edge lines, and the other end of the two second bevels intersects at the tip portion of the multi-bevel tip to form a second edge line, and the front end of the second edge line is a needle tip.

[0013] The second bevel has a second inclination angle relative to the central axis, and the second bevel has a second rotation angle relative to the second reference plane with the central axis as the rotation axis.

[0014] The two third bevels are located at the middle portion of the multi-bevel tip, and the two third bevels are symmetrically arranged with the first reference plane as the reference between each other, each third bevel intersects with a corresponding second bevel to form a third edge line, and the third bevel is located on the outer side of the second bevel relative to the first reference plane.

[0015] The third bevel has a third inclination angle relative to the central axis, and the third bevel has a third rotation angle relative to the second reference plane with the central axis as the rotation axis, and the third edge line has a fourth inclination angle relative to the central axis.

[0016] The first inclination angle is 9°±2°, the second inclination angle is 12°±2°, and the third inclination angle is 11°±2°, wherein the second inclination angle is greater than the first inclination angle.

[0017] The second rotation angle is 45°±5°, and the third rotation angle is 70°±5°.

[0018] The related contents in the above technical solution are explained as follows:

[0019] 1. In the above solution, the "front" in the "front end" refers to the direction pointed by the needle tip. The "rear" in the "rear end" refers to the opposite direction of the "front".

[0020] 2. In the above solution, the "symmetrically bisecting the needle tube" in the "defining a plane that bisects the needle tube symmetrically as a first reference plane" means that the needle tube is cut into two halves that are symmetric to each other by passing through the center axis. That is, the first reference plane is to cut the needle tube into two halves that are symmetric to each other. If the symmetry of the two halves cannot be maintained after cutting, the cutting does not meet the meaning of bisecting the needle tube.

[0021] 3. In the above solution, the two first edge lines are located on one side of the second reference plane, and the second edge line is located on the other side of the second reference plane.

[0022] 4. In the above solution, the distance from the needle tip to the projection of the rear end of the third inclined surface on the center axis is defined as the first length, the distance from the needle tip to the projection of the rear end of the second inclined surface on the center axis is defined as the second length, and the distance from the needle tip to the projection of the rear end of the first inclined surface on the center axis is defined as the third length, then:

[0023] The first length is less than the second length, and the second length is less than the third length.

[0024] 5. In the above solution, the second inclination angle is greater than the third inclination angle.

[0025] 6. In the above solution, the second inclination angle is 12°±1°.

[0026] 7. In the above solution, the third inclination angle is 11°±1°.

[0027] 8. In the above solution, the third edge line has a fourth inclination angle with respect to the center axis, and the fourth inclination angle is 13°±3°, wherein the fourth inclination angle is greater than the second inclination angle.

[0028] 9. In the above solution, the second rotation angle is 45°±3°, and the third rotation angle is 70°±3°.

[0029] To achieve the above object, the second technical solution adopted by the present application is: a syringe assembly, comprising: a syringe barrel and a needle tube connected to the syringe barrel. Wherein, the needle tube is exactly the same as the first technical solution and the explanation of the technical solution, so it is not repeated here.

[0030] To achieve the above object, the third technical solution adopted by the present application is: a blood collection device, comprising: a hub and a needle tube connected to the hub. Wherein, the needle tube is exactly the same as the first technical solution and the explanation of the technical solution, so it is not repeated here.

[0031] The design principle and technical concept of the present application is: in order to minimize the pain when the multi-bevel tip pierces the skin, the present application improves the existing five-bevel needle tip, and the improvement points and beneficial effects mainly lie in the following aspects:

[0032] 1. The present application directly extends two second bevels to the tip to form a needle tip, so that the two second bevels bear the main cutting task, and the remaining bevels serve as auxiliary bevels. The comparison patent (the closest prior art introduced in the background) is to form a needle tip with two end bevels, which is equivalent to the third bevel of the present application in terms of position and mutual adjacency. The second bevel in the present application is equivalent to the intermediate bevel in the comparison patent in terms of position and mutual adjacency. Therefore, from the perspective of multi-bevel tip design, it is a breakthrough. It breaks the design concept of gradual transition in the past multi-bevel tip design, providing a new design idea for achieving the purpose of the present application.

[0033] 2. Compared with the comparison patent, the present application reduces the second inclination angle of the second bevel, so that the fourth inclination angle of the second ridge line formed by the intersection of the two second bevels at the needle part is also smaller, so that the needle tip has smaller piercing resistance when it just pierces the skin.

[0034] 3. Compared with the comparison patent, the present application prolongs the surface length of the second bevel (i.e. the two second bevels extend from the tip of the multi-bevel tip to the base), and sets a third bevel on the outer side of the second bevel, so that the effective outer diameter of the multi-bevel tip is reduced, further reducing the piercing resistance.

[0035] 4. The design of two third bevels in the present application can effectively suppress the peak level of resistance of the second bevel during piercing. This design reduces the difference in piercing resistance between the second bevel and the first bevel during piercing, ensuring the smoothness of the transition of piercing resistance between the second bevel and the first bevel, thereby making the cutting and pulling action of the multi-bevel tip more smooth, effectively reducing the pain. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a perspective view of an embodiment of the five-bevel needle tube of the present application;

[0037] Figure 2 is a first inclination angle schematic diagram of the five-bevel needle tube of the present application;

[0038] Figure 3 is a left view of Figure 2;

[0039] Figure 4 is a second inclination angle schematic diagram of the five-bevel needle tube of the present application;

[0040] Figure 5 is a third inclination angle schematic diagram of the five-bevel needle tube of the present application;

[0041] Figure 6 is a plan schematic diagram of the five-bevel needle tube of the present application;

[0042] Figure 7 is a B-B sectional view of Figure 6;

[0043] Figure 8 is a curve diagram showing the variation of the puncture force (resistance of the needle tip) of the five-bevel needle tube of the present application with time according to the experimental data of Example 1;

[0044] Figure 9 is a curve diagram showing the variation of the puncture force (resistance of the needle tip) of the needle tube with time according to the experimental data of the comparative example of the present application.

[0045] In the above figures: 1. needle tube; 11. multi-bevel tip; 111. first bevel; 112. second bevel; 113. third bevel; 114. first ridge line; 115. second ridge line; 116. third ridge line; 117. opening; 12. central axis; a. first inclination angle; b. second inclination angle; c. third inclination angle; d. fourth inclination angle; a. second rotation angle; b. third rotation angle; X. first reference surface; Y. second reference surface; L1. first length; L2. second length; L3. third length. DETAILED DESCRIPTION

[0046] The present application will be further described below in conjunction with the accompanying drawings and examples:

[0047] Example 1: a five-bevel needle tube

[0048] As shown in Figures 1-7, the five-bevel needle tube comprises a needle tube 1 (see Figure 1) having a central axis 12 (see Figures 2, 4 and 5). One end of the needle tube 1 is provided with a multi-bevel tip 11 (see Figure 1), and the multi-bevel tip 11 is provided with an opening 117 (see Figures 1 and 3) for fluid output or injection, and the opening 117 is provided with a first bevel 111, two second bevels 112 and two third bevels 113 (see Figure 1).

[0049] To better express the position and angle relationship of each bevel on the multi-bevel tip 11, define the multi-bevel tip 11 has a tip, a middle and a base (not shown in the figure), the tip is located at the front end of the multi-bevel tip 11, the base is located at the rear end of the multi-bevel tip 11, and the middle is located between the front end and the rear end. Among them, "front" in "front end" refers to the direction pointed by the needle tip. "Rear" in "rear end" refers to the opposite direction of "front". At the same time, define the plane passing through the center axis 12 of the needle tube 1 and symmetrically dividing the needle tube 1 as the first reference plane X (see the up-down direction in FIG. 3), and define the plane passing through the center axis 12 of the needle tube 1 and perpendicular to the first reference plane X as the second reference plane Y (see the left-right direction in FIG. 3). Among them, the definition of "symmetrically dividing the needle tube" in the first reference plane X means that the needle tube 1 is cut into two halves that are symmetric to each other by passing through the center axis 12. That is, the first reference plane X is to cut the needle tube 1 into two half tubes that are symmetric to each other. If the symmetry of the two half tubes cannot be maintained after cutting, this cutting does not meet the meaning of dividing the needle tube.

[0050] The first bevel 111 is located at the base of the multi-bevel tip 11 (see FIG. 1), and the first bevel 111 is symmetrically arranged with the first reference plane X as the reference (see FIG. 3). The first bevel 111 has a first inclination angle a with respect to the center axis 12 (see FIG. 2), and the first inclination angle a is 9°±2°, preferably 9°±1°. The first bevel 111 has a first rotation angle with respect to the second reference plane Y with the center axis 12 as the rotation axis, and the first rotation angle is 0° (see FIG. 3, FIG. 6 and FIG. 7).

[0051] The two second bevels 112 extend from the base to the tip of the multi-bevel tip 11 (see FIG. 1 and FIG. 6), and the two second bevels 112 are symmetrically arranged with each other with the first reference plane X as the reference (see FIG. 3 and FIG. 6). One end of each of the two second bevels 112 intersects with the first bevel 111 to form two first edge lines 114 (see FIG. 1 and FIG. 6), and the other end of each of the two second bevels 112 intersects at the tip of the multi-bevel tip 11 to form a second edge line 115, and the front end of the second edge line 115 is the needle tip (FIG. 1 and FIG. 6). The second bevel 112 has a second inclination angle b with respect to the center axis 12 (see FIG. 4), and the second inclination angle b is 12°±2°, preferably 12°±1°. The second bevel 112 has a second rotation angle a with respect to the second reference plane Y with the center axis 12 as the rotation axis (see FIG. 7). The second rotation angle a is 45°±5°, preferably 45°±3°.

[0052] The two third inclined surfaces 113 are located in the middle of the multi-inclined tip 11 (see Figs. 1 and 6), and are symmetrically arranged with respect to the first reference plane X (see Figs. 3 and 6). Each of the third inclined surfaces 113 intersects with a corresponding second inclined surface 112 to form a third edge line 116 (see Figs. 1 and 6). With respect to the first reference plane X, the third inclined surface 113 is located outside the second inclined surface 112 (see Figs. 3 and 6). The third inclined surface 113 has a third inclination angle c with respect to the central axis 12 (see Fig. 5), and the third inclination angle c is 11°±2°, preferably 11°±1°. The third inclined surface 113 has a third rotation angle β with respect to the second reference plane Y about the central axis 12 as the rotation axis (see Fig. 7), and the third rotation angle β is 70°±5°, preferably 70°±3°. The third edge line 116 has a fourth inclination angle d with respect to the central axis 12 (see Fig. 2), and the fourth inclination angle d is 13°±3°, preferably 13°±1°.

[0053] In the present embodiment, the second inclination angle b is greater than the first inclination angle a, the fourth inclination angle d is greater than the second inclination angle b, and the second inclination angle b is greater than the third inclination angle c.

[0054] In the present embodiment, the two first edge lines 114 are located on one side of the second reference plane Y, and the second edge line 115 is located on the other side of the second reference plane Y (see Figs. 1, 3 and 6).

[0055] In the present embodiment, if the projection distance of the needle tip to the rear end of the third inclined surface 113 on the central axis 12 is defined as a first length L1, the projection distance of the needle tip to the rear end of the second inclined surface 112 on the central axis 12 is defined as a second length L2, and the projection distance of the needle tip to the rear end of the first inclined surface 111 on the central axis 12 is defined as a third length L3, then:

[0056] The first length L1 is less than the second length L2, and the second length L2 is less than the third length L3 (see Fig. 6).

[0057] The needle tube 1 of the present embodiment can be formed of a conventional material such as medical-grade stainless steel. Each inclined surface on the multi-inclined tip 11 can be formed on the needle tube 1 by a conventional process such as grinding.

[0058] In order to reduce the pain, the needle tube 1 of the present embodiment can be lubricated by a variety of conventional lubricants such as silicone oil to reduce the friction between the needle tip and the skin or tissue, thereby further reducing the pain.

[0059] Experimental data and its explanation are as follows:

[0060] The needle tube 1 of the present embodiment selects 31Gx5mm as the test object, compared with similar products, and the comparative example is BD 31Gx5mm five-bevel needle. According to the national standard "Disposable Sterile Injection Needle" (GB15811-2016), an experimental platform is built. A polyurethane film with a thickness of 0.4mm and a Shore hardness of 92.3HA is used as the measured material. A clamp is designed, and the exposed area is 10mm in diameter after clamping. An Instron 5900 testing machine is used to clamp the needle and vertically pierce the measured material at a speed of 150mm / min. The resistance of the needle is recorded as the piercing force. The needle tube parameters of the present embodiment and the comparative example (wherein the second inclination angle, the third inclination angle, the second rotation angle, and the third rotation angle are the average values) are as follows:

[0061] Angle name First inclination angle Second inclination angle Third inclination angle Fourth inclination angle Second rotation angle Third rotation angle Angle value of the present embodiment 9.2° 12° 11.2° 12.5° 43.4° 72.2° Angle value of the comparative example 10.5° 14.6° 23.2° 25.2° 39.6° 39.8°

[0062] Combining the obtained experimental data, the needle insertion process of the present embodiment can be divided into four stages, as shown in FIG. 8. First stage: the surface of the polyurethane film contacts the needle tip, and under the action of the needle tip displacement, the polyurethane film is deformed, the needle tip does not pierce the surface, and the needle insertion resistance gradually increases, which corresponds to a1 stage in FIG. 8 on the data. Second stage: the local pressure on the surface of the polyurethane film reaches the critical value of its tensile strength, the needle tip pierces the surface, i.e. the second bevel 112 pierces the film, the film stress is released to a certain extent, the needle insertion resistance decreases, and a first peak value is formed; during this process, the second inclination angle and the fourth inclination angle are small, so that the peak resistance when the needle tip pierces the film is small, which corresponds to b1 stage in FIG. 8 on the data. Third stage: the contact area between the second bevel 112 and the polyurethane film gradually increases, and during this process, the third bevel 113 is provided on the outside of the second bevel 112, and the third bevel 113 has a large third rotation angle, so that the effective outer diameter of the multi-bevel tip is reduced, further reducing the piercing resistance, and the needle insertion resistance slowly increases, which corresponds to c1 stage in FIG. 8 on the data. Fourth stage: the first bevel 111 of the multi-bevel tip 11 penetrates out of the polyurethane film, forming a second peak value, which corresponds to d1 stage in FIG. 8 on the data.

[0063] The data of the comparative needle tube experiment is shown in FIG. 9. The first stage: the surface of the polyurethane film is in contact with the needle tip, and the needle tip is deformed under the action of the displacement of the needle tip. The needle tip does not pierce the surface, and the resistance to the needle insertion gradually rises, which corresponds to the a2 stage in FIG. 9 on the data. The second stage: the local pressure on the surface of the polyurethane film reaches the critical value of the tensile strength, and the needle tip pierces the surface, i.e. the end bevel pierces the film, and the stress of the film is released to a certain extent, and the resistance to the needle insertion decreases, forming a first peak value. During this process, the third and fourth inclination angles of the end bevel are relatively large, so the peak resistance of the needle tip piercing the film is relatively large, which corresponds to the b2 stage in FIG. 9 on the data. The third stage: the contact area between the end bevel and the middle bevel and the polyurethane film gradually increases. During this process, the effective outer diameter of the middle bevel part cannot be minimized because the second rotation angle of the end bevel and the third rotation angle of the middle bevel are almost the same, so the resistance to the needle insertion rises obviously, which corresponds to the c2 stage in FIG. 9 on the data. The fourth stage: the main bevel of the multi-bevel tip penetrates out of the polyurethane film, forming a second peak value, which corresponds to the d2 stage in FIG. 9 on the data.

[0064] In summary, compared with the penetration resistance measurement results of the comparative example, the peak level of the penetration resistance in the second and third stages of the comparative example is larger, and the difference between the peak levels of the penetration resistance in the second and third stages is obvious. In the present embodiment, the peak level of the penetration resistance in the second and third stages is smaller, and the difference is smaller. Therefore, the five-bevel needle tube of the present embodiment has smaller penetration resistance and can effectively reduce the pain.

[0065] Embodiment 2: A syringe assembly

[0066] The syringe assembly comprises a syringe barrel and a needle tube 1 connected to the syringe barrel, wherein the needle tube 1 is exactly the same as the five-bevel needle tube of Embodiment 1. The description is not repeated here.

[0067] Embodiment 3: A blood collection device

[0068] The blood collection device comprises a hub and a needle tube 1 connected to the hub, wherein the needle tube 1 is exactly the same as the five-bevel needle tube of Embodiment 1. The description is not repeated here.

[0069] For the above embodiments, the possible variations of the present application are described as follows:

[0070] 1. In the above Embodiment 1, the needle tube 1 is formed of a conventional material of medical-grade stainless steel. However, the present application is not limited thereto, and in addition thereto, medical-grade plastic, composite material, ceramic or similar material can be used as an alternative material. This is understood and known by those skilled in the art.

[0071] 2. In the above embodiment 1, the needle 1 is selected to be 31G. However, the present application is not limited to this, but can also be selected to be 21G (0.03225 inch outer diameter, 0.02025 inch inner diameter), 23G (0.2525 inch outer diameter, 0.01325 inch inner diameter), and 25G (0.02025 inch outer diameter, 0.01025 inch inner diameter) in addition to this, and 0.002-0.005 inch in wall thickness. A needle of small diameter, such as 31G and 32G (0.00925-0.01025 inch outer diameter), is generally used for injection, while a needle of larger diameter, such as 21G, 23G, and 25G (0.02025-0.03225 inch outer diameter), is generally used for blood extraction. This is understood and known by those skilled in the art.

[0072] 3. In the above embodiment 1, each of the bevels on the multi-bevel tip 11 can be formed by a conventional grinding process (e.g., by lapping). For example, the first bevel 111 and the second bevel 112 are ground first, and then the third bevel 113 is ground. For another example, the second bevel 112 is ground first, and then the first bevel 111 and the third bevel 113 are ground.

[0073] The above embodiments are only for illustrating the technical concept and features of the present application, and are intended to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made in accordance with the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A five-bevel needle tube comprising: A needle tube (1), the needle tube (1) having a central axis (12), one end of the needle tube (1) being provided with a multi-bevel tip (11), the multi-bevel tip (11) being provided with an opening (117) for fluid output or injection, and a first bevel (111), two second bevels (112) and two third bevels (113) being provided around the opening (117); The multi-bevel tip (11) is defined as having a tip, a middle portion, and a base portion, wherein the tip is located at the front end of the multi-bevel tip (11), the base is located at the rear end of the multi-bevel tip (11), and the middle portion is located between the front end and the rear end; A plane passing through the central axis (12) of the needle tube (1) and symmetrically bisecting the needle tube (1) is defined as a first reference plane (X), and a plane passing through the central axis (12) of the needle tube (1) and perpendicular to the first reference plane (X) is defined as a second reference plane (Y); The first inclined surface (111) is located at the base of the multi-bevel tip (11), the first inclined surface (111) is symmetrically arranged with respect to the first reference surface (X), the first inclined surface (111) has a first inclination angle (a) relative to the central axis (12), and the first inclined surface (111) has a first rotation angle relative to the second reference surface (Y) with the central axis (12) as the rotation axis, and the first rotation angle is 0°; Its characteristics are: The two second inclined surfaces (112) extend from the base to the tip of the multi-bevel tip (11), and the two second inclined surfaces (112) are symmetrically arranged with respect to the first reference plane (X), one end of the two second inclined surfaces (112) intersects with the first inclined surface (111) to form two first ridges (114), and the other ends of the two second inclined surfaces (112) intersect at the tip of the multi-bevel tip (11) to form a second ridge (115), and the front end of the second ridge (115) is a needle tip; The second inclined surface (112) has a second inclination angle (b) relative to the central axis (12), and the second inclined surface (112) has a second rotation angle (α) relative to the second reference surface (Y) with the central axis (12) as the rotation axis; The two third inclined surfaces (113) are located in the middle of the multi-bevel tip (11), and the two third inclined surfaces (113) are symmetrically arranged with respect to the first reference plane (X), and each third inclined surface (113) intersects with a corresponding second inclined surface (112) to form a third ridge line (116), and the third inclined surface (113) is located outside the second inclined surface (112) relative to the first reference plane (X); The third inclined surface (113) has a third inclination angle (c) relative to the central axis (12), and the third inclined surface (113) has a third rotation angle (β) relative to the second reference surface (Y) with the central axis (12) as the rotation axis; The first inclination angle (a) is 9°±2°, the second inclination angle (b) is 12°±2°, and the third inclination angle (c) is 11°±2°, wherein the second inclination angle (b) is greater than the first inclination angle (a); The second rotation angle (α) is 45°±5°, and the third rotation angle (β) is 70°±5°.

2. The five-bevel needle tube according to claim 1, wherein: The two first ridges (114) are located on one side of the second reference plane (Y), and the one second ridge (115) is located on the other side of the second reference plane (Y).

3. The five-bevel needle tube according to claim 1, wherein: The projection distance from the needle tip to the rear end of the third bevel (113) on the central axis (12) is defined as a first length (L1), the projection distance from the needle tip to the rear end of the second bevel (112) on the central axis (12) is defined as a second length (L2), and the projection distance from the needle tip to the rear end of the first bevel (111) on the central axis (12) is defined as a third length (L3), then: The first length (L1) is less than the second length (L2) and is less than the third length (L3).

4. The five-bevel needle tube according to claim 1, wherein: The second inclination angle (b) is greater than the third inclination angle (c).

5. The five-bevel needle tube according to claim 1, wherein: The second inclination angle (b) is 12°±1°.

6. The five-bevel needle tube according to claim 1, wherein: The third inclination angle (c) is 11°±1°.

7. The five-bevel needle tube according to claim 1, wherein: The third ridge line (116) has a fourth inclination angle (d) relative to the central axis (12), the fourth inclination angle (d) is 13°±3°, and the fourth inclination angle (d) is greater than the second inclination angle (b).

8. The five-bevel needle tube according to claim 1, wherein: The second rotation angle (α) is 45°±3°, and the third rotation angle (β) is 70°±3°.

9. A syringe assembly comprising: A syringe barrel and a needle (1) connected to the syringe barrel; The needle tube (1) has a central axis (12), and one end of the needle tube (1) is provided with a multi-bevel tip (11), the multi-bevel tip (11) is provided with an opening (117) for fluid output or injection, and a first bevel (111), two second bevels (112), and two third bevels (113) are provided around the opening (117); The multi-bevel tip (11) is defined as having a tip, a middle portion, and a base portion, wherein the tip is located at the front end of the multi-bevel tip (11), the base is located at the rear end of the multi-bevel tip (11), and the middle portion is located between the front end and the rear end; A plane passing through the central axis (12) of the needle tube (1) and symmetrically bisecting the needle tube (1) is defined as a first reference plane (X), and a plane passing through the central axis (12) of the needle tube (1) and perpendicular to the first reference plane (X) is defined as a second reference plane (Y); The first inclined surface (111) is located at the base of the multi-bevel tip (11), and the first inclined surface (111) is symmetrically arranged with respect to the first reference surface (X); the first inclined surface (111) has a first inclination angle (a) relative to the central axis (12); the first inclined surface (111) has a first rotation angle relative to the second reference surface (Y) with the central axis (12) as the rotation axis, and the first rotation angle is 0°; Its characteristics are: The two second inclined surfaces (112) extend from the base to the tip of the multi-bevel tip (11), and the two second inclined surfaces (112) are symmetrically arranged with respect to the first reference plane (X), one end of the two second inclined surfaces (112) intersects with the first inclined surface (111) to form two first ridges (114), and the other ends of the two second inclined surfaces (112) intersect at the tip of the multi-bevel tip (11) to form a second ridge (115), and the front end of the second ridge (115) is a needle tip; The second inclined surface (112) has a second inclination angle (b) relative to the central axis (12), and the second inclined surface (112) has a second rotation angle (α) relative to the second reference surface (Y) with the central axis (12) as the rotation axis; The two third inclined surfaces (113) are located in the middle of the multi-bevel tip (11), and the two third inclined surfaces (113) are symmetrically arranged with respect to the first reference plane (X), and each third inclined surface (113) intersects with a corresponding second inclined surface (112) to form a third ridge line (116), and the third inclined surface (113) is located outside the second inclined surface (112) relative to the first reference plane (X); The third inclined surface (113) has a third inclination angle (c) relative to the central axis (12), the third inclined surface (113) has a third rotation angle (β) relative to the second reference surface (Y) with the central axis (12) as the rotation axis, and the third ridge line (116) has a fourth inclination angle (d) relative to the central axis (12); The first inclination angle (a) is 9°±2°, the second inclination angle (b) is 12°±2°, and the third inclination angle (c) is 11°±2°, wherein the second inclination angle (b) is greater than the first inclination angle (a); The second rotation angle (α) is 45°±5°, and the third rotation angle (β) is 70°±5°.

10. A blood collection device comprising: a hub and a needle tube (1) connected to the hub; The needle tube (1) has a central axis (12), and one end of the needle tube (1) is provided with a multi-bevel tip (11), the multi-bevel tip (11) is provided with an opening (117) for fluid output or injection, and a first bevel (111), two second bevels (112), and two third bevels (113) are provided around the opening (117); The multi-bevel tip (11) is defined as having a tip, a middle portion, and a base portion, wherein the tip is located at the front end of the multi-bevel tip (11), the base is located at the rear end of the multi-bevel tip (11), and the middle portion is located between the front end and the rear end; A plane passing through the central axis (12) of the needle tube (1) and symmetrically bisecting the needle tube (1) is defined as a first reference plane (X), and a plane passing through the central axis (12) of the needle tube (1) and perpendicular to the first reference plane (X) is defined as a second reference plane (Y); The first inclined surface (111) is located at the base of the multi-bevel tip (11), and the first inclined surface (111) is symmetrically arranged with respect to the first reference surface (X); the first inclined surface (111) has a first inclination angle (a) relative to the central axis (12); the first inclined surface (111) has a first rotation angle relative to the second reference surface (Y) with the central axis (12) as the rotation axis, and the first rotation angle is 0°; Its characteristics are: The two second inclined surfaces (112) extend from the base to the tip of the multi-bevel tip (11), and the two second inclined surfaces (112) are symmetrically arranged with respect to the first reference plane (X), one end of the two second inclined surfaces (112) intersects with the first inclined surface (111) to form two first ridges (114), and the other ends of the two second inclined surfaces (112) intersect at the tip of the multi-bevel tip (11) to form a second ridge (115), and the front end of the second ridge (115) is a needle tip; The second inclined surface (112) has a second inclination angle (b) relative to the central axis (12), and the second inclined surface (112) has a second rotation angle (α) relative to the second reference surface (Y) with the central axis (12) as the rotation axis; The two third inclined surfaces (113) are located in the middle of the multi-bevel tip (11), and the two third inclined surfaces (113) are symmetrically arranged with respect to the first reference plane (X), and each third inclined surface (113) intersects with a corresponding second inclined surface (112) to form a third ridge line (116). Relative to the first reference plane (X), the third inclined surface (113) is located outside the second inclined surface (112); The third inclined surface (113) has a third inclination angle (c) relative to the central axis (12), the third inclined surface (113) has a third rotation angle (β) relative to the second reference surface (Y) with the central axis (12) as the rotation axis, and the third ridge line (116) has a fourth inclination angle (d) relative to the central axis (12); The first inclination angle (a) is 9°±2°, the second inclination angle (b) is 12°±2°, and the third inclination angle (c) is 11°±2°, wherein the second inclination angle (b) is greater than the first inclination angle (a); The second rotation angle (α) is 45°±5°, and the third rotation angle (β) is 70°±5°.

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