CN118320232A - A five-bevel needle tube - Google Patents

Abstract

A five-bevel needle tube, is provided with a first bevel, two second bevels and two third bevels on its many bevel tips, and first bevel has first inclination 9 ± 2 for the central axis, and first rotation angle of first bevel is 0, its characterized in that: two second bevel surfaces as main cutting surfaces extend from the base of the multi-bevel tip to the tip and are symmetrically arranged, the two second bevel surfaces intersect at the tip to form a second ridge with a needle tip, the second bevel surfaces have a second inclination angle of 12 DEG + -2 DEG and a second rotation angle of 45 DEG + -5 DEG; the two third inclined planes are positioned in the middle of the multi-inclined-plane tip and are symmetrically arranged, each third inclined plane is intersected with one second inclined plane to form a third line, and the third inclined planes are positioned on the outer sides of the second inclined planes. The third bevel has a third angle of inclination of 11 deg. + -2 deg. and a third angle of rotation of 70 deg. + -5 deg.. The proposal improves the existing five-bevel needle point, and reduces the pain of the needle point when puncturing the skin to the greatest extent.

Description

A five-bevel needle tube

Technical Field

The invention belongs to the technical field of medical needles, and in particular relates to a five-bevel needle tube. The five-bevel needle tube has a multi-bevel tip with a novel shape, and can further reduce the pain of puncture compared with a traditional needle tube.

Background technique

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

One end of the pen needle has a needle tip for penetrating the patient's skin for injection, while the other end is connected to the injection pen for drug delivery. During the injection process, different needle tip shapes may require greater or less force to pierce the skin, and when the needle tip piercing force is greater, the pain increases, and when the needle tip piercing force is less, the pain is less. At the same time, studies have shown that the pain experienced by patients during needle insertion is caused by the skin tissue being cut by the beveled edge at the end of the needle tip and then the tissue being pulled by the needle tip. The smoother the transition between the different bevels at the end of the needle tip, the smoother the cutting and pulling action of the needle tip.

Chinese patent CN107847685A discloses a five-bevel cannula for a blood acquisition device, i.e., a five-bevel needle tube. The multi-bevel tip of the needle tube includes: a main bevel, two intermediate bevels, and two terminal 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°, the third inclination angle formed by the terminal 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 terminal bevel, and the length of the two terminal bevels is 15% to 30% of the total length of the multi-bevel tip. This solution can effectively reduce the puncture force and thus alleviate the pain, but because the third inclination angle and the second inclination angle are larger than the first inclination angle, the inclination angle of the ridge formed by the intersection of the two terminal bevels is also larger, so that the needle tip has a larger puncture resistance when it just penetrates the skin. In addition, because the length of the terminal bevel is 15% to 30% of the total length of the multi-bevel tip, the effective outer diameter of the intermediate bevel part cannot be minimized during the entire multi-bevel tip insertion process, and therefore it is not enough to minimize the patient's pain.

Therefore, how to design a five-bevel needle tube to minimize the pain is a problem that the present invention needs to solve.

Summary of the invention

The present invention provides a five-bevel needle tube, the purpose of which is to minimize the pain when the multi-bevel tip punctures the skin.

To achieve the above-mentioned purpose, the first technical solution adopted by the present invention 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, 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 provided around the opening.

The multi-bevel tip is defined as having a tip portion, a middle portion and a base portion, wherein 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.

A plane passing through the central axis of the needle tube and symmetrically dividing the needle tube in half 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.

The first bevel is located at the base of the multi-bevel tip, and the first bevel is symmetrically arranged with the first reference plane as a 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°.

The invention is innovative in that:

The two second bevels extend from the base of the multi-bevel tip to the tip, and the two second bevels are symmetrically arranged with respect to the first reference plane. One end of the two second bevels intersects with the first bevel to form two first ridges, and the other ends of the two second bevels intersect at the tip of the multi-bevel tip to form a second ridge, and the front end of the second ridge is the needle tip.

The second inclined surface has a second inclination angle relative to the central axis, and the second inclined surface has a second rotation angle relative to the second reference surface with the central axis as the rotation axis.

The two third inclined planes are located in the middle of the multi-bevel tip, and are symmetrically arranged relative to each other with the first reference plane as a reference. Each third inclined plane intersects with a corresponding second inclined plane to form a third edge line. Relative to the first reference plane, the third inclined plane is located on the outside of the second inclined plane.

The third inclined surface has a third inclination angle relative to the central axis, the third inclined surface has a third rotation angle relative to the second reference surface with the central axis as the rotation axis, and the third ridge line has a fourth inclination angle relative to the central axis.

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.

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

The relevant contents in the above technical solution are explained as follows:

1. In the above scheme, 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".

2. In the above scheme, the meaning of "the plane passing through the central axis of the needle tube and symmetrically bisecting the needle tube" in "defining the plane passing through the central axis of the needle tube and symmetrically bisecting the needle tube as the first reference plane" is to cut the needle tube through the central axis into two halves with mutually symmetrical structures. That is, the first reference plane is to cut the needle tube into two half tubes with mutually symmetrical structures. If the mutual symmetry of the two half tubes cannot be maintained after cutting, then this cutting does not meet the meaning of bisecting the needle tube.

3. In the above solution, the two first ridges are located on one side of the second reference surface, and the one second ridge is located on the other side of the second reference surface.

4. In the above scheme, the projection distance from the needle tip to the rear end of the third bevel on the central axis is defined as the first length, the projection distance from the needle tip to the rear end of the second bevel on the central axis is defined as the second length, and the projection distance from the needle tip to the rear end of the first bevel on the central axis is defined as the third length, then:

The first length is less than the second length and less than the third length.

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

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

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

8. In the above solution, the third ridgeline has a fourth inclination angle relative to the central axis, the fourth inclination angle is 13°±3°, and the fourth inclination angle is greater than the second inclination angle.

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

To achieve the above object, the second technical solution adopted by the present invention is: a syringe assembly, comprising: a syringe barrel and a needle tube connected to the syringe barrel. The needle tube is exactly the same as the first technical solution and the explanation of the technical solution, so it will not be described again.

To achieve the above object, the third technical solution adopted by the present invention is: a blood collection device, comprising: a hub and a needle tube connected to the hub. The needle tube is exactly the same as the first technical solution and the explanation of the technical solution, so it will not be described again.

The design principle and technical concept of the present invention are: in order to minimize the pain caused by the multi-bevel tip puncturing the skin, the present invention improves the existing five-bevel needle tip, and its improvements and beneficial effects are mainly reflected in the following aspects:

1. The present invention directly extends two second bevels to the tip to form a needle tip, allowing the two second bevels to take on the main cutting task, and the remaining bevels serve as auxiliary bevels. The comparative patent (the closest prior art introduced in the background technology) forms the needle tip with two end bevels, and the end bevels are equivalent to the third bevel of the present invention from the perspective of position and mutual adjacency. The second bevel in the present invention is equivalent to the middle bevel of the comparative patent from the perspective of position and mutual adjacency. Therefore, from the perspective of multi-bevel tip design, this is a breakthrough. It breaks the previous multi-bevel tip design that uses a gradual transition design concept, and provides a new design idea for achieving the purpose of the present invention.

2. Compared with the comparative patent, the present invention reduces the second inclination angle of the second bevel, so that the fourth inclination angle of the second ridge formed by the intersection of the two second bevels at the needle portion also becomes smaller, so that the needle tip has a smaller puncture resistance when it just penetrates the skin.

3. Compared with the comparative patent, the present invention reduces the effective outer diameter of the multi-bevel tip by extending the surface length of the second bevel (i.e., the two second bevels extend from the tip to the base of the multi-bevel tip) and arranging the third bevel on the outer side of the second bevel, thereby further reducing the puncture resistance.

4. The two third bevel designs of the present invention can effectively suppress the peak resistance level of the second bevel during the puncture process. This design reduces the difference in puncture resistance from the second bevel to the first bevel during the puncture process, ensuring the smooth transition of puncture resistance from the second bevel to the first bevel, thereby making the cutting and pulling actions of the multi-bevel tip smoother and effectively reducing pain.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a three-dimensional view of a five-bevel needle tube embodiment of the present invention;

FIG2 is a schematic diagram of a first inclination angle of a five-bevel needle tube embodiment of the present invention;

Accompanying drawing 3 is a left side view of Fig. 2;

FIG4 is a schematic diagram of a second inclination angle of a five-bevel needle tube embodiment of the present invention;

FIG5 is a schematic diagram of a third inclination angle of a five-bevel needle tube embodiment of the present invention;

Figure 6 is a schematic plan view of an embodiment of a five-bevel needle tube of the present invention;

Accompanying drawing 7 is a cross-sectional view taken along the line B-B of Fig. 6;

FIG8 is a graph showing the variation of the puncture force (resistance on the needle tip) of the five-bevel needle tube over time, shown in the experimental data of Example 1 of the present invention;

FIG9 is a graph showing the variation of the needle puncture force (resistance experienced by the needle tip) over time according to comparative experimental data of the present invention.

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

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

Example 1: A five-bevel needle tube

As shown in Figures 1-7, the five-bevel needle tube includes: a needle tube 1 (see Figure 1), the needle tube 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 for fluid output or injection (see Figures 1 and 3), and a first bevel 111, two second bevels 112 and two third bevels 113 are provided around the opening 117 (see Figure 1).

In order to better express the position and angle relationship of each bevel on the multi-bevel tip 11, it is defined that the multi-bevel tip 11 has a tip, a middle part 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 part is located between the front end and the rear end. Among them, 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". At the same time, the plane passing through the central axis 12 of the needle tube 1 and symmetrically bisecting the needle tube 1 is defined as the first reference plane X (see the up and down direction in Figure 3), and the plane passing through the central axis 12 of the needle tube 1 and perpendicular to the first reference plane X is defined as the second reference plane Y (see the left and right direction in Figure 3). Among them, the meaning of "symmetrically bisecting the needle tube" in the definition of the first reference plane X is to cut the needle tube 1 into two halves with mutually symmetrical structures through the central axis 12. That is, the first reference plane X is to cut the needle tube 1 into two half tubes with mutually symmetrical structures. If the mutual symmetry of the two half tubes cannot be maintained after cutting, this cutting does not meet the meaning of bisecting the needle tube.

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

The two second inclined surfaces 112 extend from the base to the tip of the multi-bevel tip 11 (see Figures 1 and 6), and the two second inclined surfaces 112 are symmetrically arranged relative to each other with the first reference plane X as the reference (see Figures 3 and 6), and one end of the two second inclined surfaces 112 intersects with the first inclined surface 111 to form two first ridges 114 (see Figures 1 and 6), 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 (Figures 1 and 6). The second inclined surface 112 has a second inclination angle b relative to the central axis 12 (see Figure 4), and the second inclination angle b is 12°±2°, preferably 12°±1°. The second inclined surface 112 has a second rotation angle α relative to the second reference plane Y with the central axis 12 as the rotation axis (see Figure 7). The second rotation angle α is 45°±5°, preferably 45°±3°.

The two third inclined surfaces 113 are located in the middle of the multi-bevel tip 11 (see Figures 1 and 6). The two third inclined surfaces 113 are symmetrically arranged relative to the first reference plane X (see Figures 3 and 6). Each third inclined surface 113 intersects with a corresponding second inclined surface 112 to form a third ridgeline 116 (see Figures 1 and 6). Relative to the first reference plane X, the third inclined surface 113 is located outside the second inclined surface 112 (see Figures 3 and 6). The third inclined surface 113 has a third inclination angle c relative to the central axis 12 (see Figure 5), and the third inclination angle c is 11°±2°, preferably 11°±1°. The third inclined surface 113 has a third rotation angle β relative to the second reference plane Y with the central axis 12 as the rotation axis (see Figure 7), and the third rotation angle β is 70°±5°, preferably 70°±3°. The third ridge line 116 has a fourth inclination angle d (see FIG. 2 ) relative to the central axis 12 . The fourth inclination angle d is 13°±3°, preferably 13°±1°.

In this embodiment, the second inclination angle b>the first inclination angle a, the fourth inclination angle d>the second inclination angle b, and the second inclination angle b>the third inclination angle c.

In this embodiment, 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 (see FIGS. 1 , 3 and 6 ).

In this embodiment, if the projection distance from the needle tip to the rear end of the third bevel 113 on the central axis 12 is defined as the 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 the 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 the third length L3, then:

The first length L1<the second length L2<the third length L3 (see FIG. 6 ).

The needle tube 1 of this embodiment can be formed of conventional materials such as medical grade stainless steel. Each bevel on the multi-bevel tip 11 can be formed on the needle tube 1 by conventional processes (such as by grinding).

In order to reduce the pain, the needle tube 1 of this embodiment can be lubricated by various conventional lubricants (such as silicone oil) to reduce the friction between the needle tip and the skin or tissue, thereby further reducing the pain.

The experimental data and their descriptions are as follows:

The needle tube 1 of this embodiment uses 31G×5mm as the test object. Compared with similar products, the comparative example is a BD31G×5mm five-bevel needle. The experimental platform is built according to the national standard "Disposable Sterile Injection Needle" (GB15811-2016). A polyurethane film with a thickness of 0.4mm and a Shore hardness of 92.3HA is used as the material to be tested. The fixture is designed, and the diameter of the exposed area after clamping is 10mm. The Instron5900 testing machine is used to clamp the needle and vertically puncture the material to be tested at a uniform speed of 150mm/min. The resistance of the needle is recorded as the puncture force. The needle tube parameters of the needle tube 1 of this embodiment and the comparative example (where the second inclination angle, the third inclination angle, the second rotation angle, and the third rotation angle are all averaged) are as follows:

Angle Name First tilt angle The second tilt angle The third inclination angle Fourth tilt angle The second rotation angle The third rotation angle The angle value of this embodiment 9.2° 12° 11.2° 12.5° 43.4° 72.2° Proportional angle value 10.5° 14.6° 23.2° 25.2° 39.6° 39.8°

Combined with the experimental data obtained, the needle tube of this embodiment can divide the needle insertion process into four stages, as shown in Figure 8. The first stage: the surface of the polyurethane film contacts the needle tip, and is deformed under the action of the needle tip displacement. The needle tip does not pierce the surface, and the needle insertion resistance gradually increases, which corresponds to the stage a1 in Figure 8 in terms of data. The second stage: the local pressure on the surface of the polyurethane film reaches its critical value of tensile strength, the needle tip pierces the surface, that is, the second inclined surface 112 penetrates the film, the film stress is released to a certain extent, the needle insertion resistance decreases, and the first peak value is formed; in this process, since the second inclination angle and the fourth inclination angle are small, the peak resistance is small when the needle tip pierces the film, which corresponds to the stage b1 in Figure 8 in terms of data. The third stage: the contact surface between the second inclined surface 112 and the polyurethane film gradually increases. In this process, since the third inclined surface 113 is provided on the outside of the second inclined surface 112, and the third inclined surface 113 has a large third rotation angle, the effective outer diameter of the multi-bevel tip is reduced, which further reduces the puncture resistance and makes the needle insertion resistance rise slowly, which corresponds to the stage c1 in Figure 8 in terms of data. Stage 4: the first slope 111 of the multi-slope tip 11 penetrates the polyurethane film to form a second peak, which corresponds to stage d1 in FIG. 8 in terms of data.

The experimental data of the comparative needle tube are shown in Figure 9. The first stage: the surface of the polyurethane film contacts the needle tip, and deformation occurs under the action of the needle tip displacement. The needle tip does not pierce the surface, and the needle resistance gradually increases, which corresponds to the a2 stage in Figure 9 in terms of data. The second stage: the local pressure on the surface of the polyurethane film reaches the critical value of its tensile strength, and the needle tip pierces the surface, that is, the end bevel pierces the film, the film stress is released to a certain extent, the needle resistance decreases, and the first peak value is formed; in this process, since the third and fourth inclination angles of the end bevel are large, the peak resistance when the needle tip pierces the film is relatively large, which corresponds to the b2 stage in Figure 9 in terms of data. The third stage: the contact surface between the end bevel and the middle bevel and the polyurethane film gradually increases. In this process, since the second rotation angle of the end bevel and the third rotation angle of the middle bevel are almost the same, the effective outer diameter of the middle bevel cannot be minimized, so the needle resistance increases significantly, which corresponds to the c2 stage in Figure 9 in terms of data. Stage 4: The main slope of the multi-bevel tip penetrates the polyurethane film to form a second peak, which corresponds to stage d2 in Figure 9 in terms of data.

In summary, combined with the measurement results of the puncture resistance of the comparative example, compared with the present embodiment, the peak levels of the puncture resistance of the comparative example in the second and third stages are larger, and the peak levels of the puncture resistance in the second and third stages are significantly different, while the peak levels of the puncture resistance in the second and third stages of the present embodiment are smaller, and the difference is smaller. Therefore, the five-bevel needle tube of the present embodiment has smaller puncture resistance and can effectively reduce pain.

Embodiment 2: A syringe assembly

The syringe assembly comprises: a syringe barrel and a needle tube 1 connected to the syringe barrel, wherein the needle tube 1 is completely the same as the five-bevel needle tube of Example 1. The description will not be repeated here.

Example 3: A blood collection device

The blood collection device comprises: a hub and a needle tube 1 connected to the hub, wherein the needle tube 1 is completely the same as the five-bevel needle tube of Example 1. The description will not be repeated here.

With respect to the above-mentioned embodiment, possible changes of the present invention are described as follows:

1. In the above embodiment 1, the needle tube 1 is formed of conventional medical grade stainless steel. However, the present invention is not limited thereto, and medical grade plastics, composite materials, ceramics or similar materials may also be used as alternative materials. This is something that those skilled in the art can understand and know.

2. In the above embodiment 1, the needle tube 1 is selected as 31G. However, the present invention is not limited to this. In addition, the diameters of 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) and the wall thickness of 0.002-0.005 inch can also be selected. Small diameter needles, such as 31G and 32G (0.00925 inch to 0.01025 inch outer diameter), are usually used for injection, while larger diameter needles, such as 21G, 23G and 25G (0.02025 inch to 0.03225 inch outer diameter), are usually used for drawing blood. This is understandable and known to those skilled in the art.

3. In the above embodiment 1, each bevel 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.

The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims (10)

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, 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 portion, a middle portion and a base portion, wherein the tip portion is located at the front end of the multi-bevel tip (11), the base portion 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 dividing 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-inclined 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), 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°; Features: The two second inclined surfaces (112) extend from the base to the tip of the multi-bevel tip (11), the two second inclined surfaces (112) are symmetrically arranged relative to each other with the first reference plane (X) as a reference, one end of the two second inclined surfaces (112) respectively 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-inclined tip (11), the two third inclined surfaces (113) are symmetrically arranged relative to each other with the first reference plane (X) as a reference, 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; 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)>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, characterized in that 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, characterized in that: the projection distance from the needle tip to the rear end of the third bevel (113) on the central axis (12) is defined as the 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 the 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 the third length (L3), then: The first length (L1) is less than the second length (L2) and 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 is characterized in that the third edge 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)>the second inclination angle (b). 8. The five-bevel needle tube according to claim 1, characterized in that 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 tube (1) connected to the syringe barrel; The needle tube (1) has a central axis (12); 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; 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 portion, a middle portion and a base portion, wherein the tip portion is located at the front end of the multi-bevel tip (11), the base portion 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 dividing 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-inclined tip (11), and the first inclined surface (111) is symmetrically arranged with the first reference surface (X) as a reference; 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 a rotation axis, and the first rotation angle is 0°; Features: The two second inclined surfaces (112) extend from the base to the tip of the multi-bevel tip (11), the two second inclined surfaces (112) are symmetrically arranged relative to each other with the first reference plane (X) as a reference, one end of the two second inclined surfaces (112) respectively 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-inclined tip (11), the two third inclined surfaces (113) are symmetrically arranged relative to each other with the first reference plane (X) as a reference, 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)>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); 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; 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 portion, a middle portion and a base portion, wherein the tip portion is located at the front end of the multi-bevel tip (11), the base portion 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 dividing 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-inclined tip (11), and the first inclined surface (111) is symmetrically arranged with the first reference surface (X) as a reference; 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 a rotation axis, and the first rotation angle is 0°; Features: The two second inclined surfaces (112) extend from the base to the tip of the multi-bevel tip (11), the two second inclined surfaces (112) are symmetrically arranged relative to each other with the first reference plane (X) as a reference, one end of the two second inclined surfaces (112) respectively 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-inclined tip (11), the two third inclined surfaces (113) are symmetrically arranged relative to each other with the first reference plane (X) as a reference, 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)>the first inclination angle (a); The second rotation angle (α) is 45°±5°, and the third rotation angle (β) is 70°±5°.