Six-inclined-plane needle tube and syringe assembly and blood collection device thereof

Abstract

A six-inclined-plane needle tube, an injector assembly thereof and a blood collection device are characterized in that a first inclined plane, two second inclined planes, two third inclined planes and a fourth inclined plane are arranged on a multi-inclined-plane tip, the first inclined plane has a first inclination angle of 10 + / -2 degrees, and the first rotation angle of the first inclined plane is 0 degree; the two second slopes are located in the middle of the multi-slope tip and are symmetrically arranged, and each second slope has a second inclination angle of 12 degrees + / -2 degrees and a second rotation angle of 23 degrees + / -5 degrees; the two third inclined planes are positioned at the tip part of the multi-inclined-plane tip and are symmetrically arranged; the third inclined planes have a third inclined angle of 19 degrees + / -2 degrees and a third rotation angle of 35 degrees + / -5 degrees; the fourth inclined planes are positioned at the tip part of the multi-inclined-plane tip and are symmetrically arranged; and the fourth inclined planes have fourth rotation angles of 17 degrees + / -2 degrees and 0 degree. According to the scheme, the pain when the needle point punctures the skin is reduced to the maximum extent.

Description

Technical Field

[0001] The invention belongs to the technical field of medical needles, and specifically relates to a six-bevel needle tube and a syringe assembly thereof and a blood collection device. The six-bevel needle tube has a multi-bevel tip of a novel shape, which can further reduce the pain of puncture compared with a traditional needle tube. Background Art

[0002] 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.

[0003] 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 pierces with greater force, the pain increases, and when the needle tip pierces with less force, the pain is lower. 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.

[0004] Chinese patent CN103237568A discloses a medical hollow needle and a method for manufacturing a medical hollow needle. Among them, the medical hollow needle uses the first to fourth inclined surfaces with specific inclination directions and rotation angles to combine with each other to form a multi-bevel tip. Compared with the traditional three-bevel needle tube, this solution can effectively reduce the puncture force and thus reduce the pain. However, due to the combination of the first to fourth inclined surfaces in terms of inclination direction and rotation angle, the ridges and smoothness between the multiple bevels of the needle tip are not minimized, resulting in the smoothness of the cutting and pulling of the needle tip not being minimized, which is not enough to minimize the pain of the patient during use.

[0005] Therefore, how to design a six-bevel needle tube and its syringe assembly and blood collection device to minimize the pain of the patient is a problem that the present invention needs to solve. Summary of the invention

[0006] The present invention provides a six-bevel needle tube, a syringe assembly thereof and a blood collection device, the purpose of which is to minimize the pain when the multi-bevel tip punctures the skin.

[0007] To achieve the above-mentioned purpose, the first technical solution adopted by the present invention is: a six-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, two third bevels and a fourth bevel are provided around the opening.

[0008] 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.

[0009] 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.

[0010] 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°.

[0011] The two second inclined surfaces are located in the middle of the multi-bevel tip, and the two second inclined surfaces are symmetrically arranged with the first reference plane as a reference. One end of the two second inclined surfaces respectively intersects with the first inclined surface to form two first ridges; 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 plane with the central axis as the rotation axis.

[0012] The two third bevels are located at the tip of the multi-bevel tip, and the two third bevels are symmetrically arranged with respect to the first reference plane. One end of each third bevel intersects with a corresponding second bevel to form a second edge line, and the other end of each third bevel extends to the tip of the multi-bevel tip, and the other ends of the two third bevels converge at the tip to form two side edges of the needle tip; 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.

[0013] The present invention is:

[0014] The fourth bevel is located at the tip of the multi-bevel tip, the fourth bevel is symmetrically arranged with the first reference plane as a reference, the fourth bevel intersects with the third bevel to form a third edge line, the fourth bevel forms the positive edge of the needle tip, the positive edge is located between the two side edges and together form a three-faceted needle tip; the fourth bevel has a fourth inclination angle relative to the central axis, the fourth bevel has a fourth rotation angle relative to the second reference plane with the central axis as the rotation axis, and the fourth rotation angle is 0°.

[0015] The first inclination angle is 10°±2°, the second inclination angle is 12°±2°, the third inclination angle is 19°±2°, and the fourth inclination angle is 17°±2°, wherein the third inclination angle>the fourth inclination angle, the fourth inclination angle>the second inclination angle, and the second inclination angle>the first inclination angle (a).

[0016] The second rotation angle is 23°±5°, and the third rotation angle is 35°±5°.

[0017] The relevant contents in the above technical solution are explained as follows:

[0018] 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".

[0019] 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.

[0020] 3. In the above solution, the first inclined plane is located on one side of the second reference plane, the fourth inclined plane and the two third inclined planes are located on the other side of the second reference plane, and the two second inclined planes intersect the second reference plane.

[0021] 4. In the above scheme, the projection distance from the needle tip to the rear end of the fourth bevel on the central axis is defined as the first length, the projection distance from the needle tip to the rear end of the third bevel on the central axis is defined as the second length, the projection distance from the needle tip to the rear end of the second bevel on the central axis is defined as the third 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 fourth length, then:

[0022] The first length is less than the second length and the third length is less than the fourth length.

[0023] 5. In the above solution, the first inclination angle is 10°±1°.

[0024] 6. In the above solution, the second inclination angle is 12°±1°.

[0025] 7. In the above solution, the third inclination angle is 19°±1°.

[0026] 8. In the above solution, the fourth inclination angle is 17°±1°.

[0027] 9. In the above solution, the second rotation angle is 23°±3°, and the third rotation angle is 35°±3°.

[0028] To achieve the above object, the second technical solution adopted by the present invention is: a syringe assembly with a six-bevel needle tube, 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.

[0029] To achieve the above object, the third technical solution adopted by the present invention is: a blood collection device with a six-bevel needle tube, 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.

[0030] The design principle and technical concept of the present invention are: in order to minimize the pain caused by the multi-bevel tip piercing the skin, the present invention improves the existing technology, and its improvements and beneficial effects are mainly reflected in the following aspects:

[0031] 1. Through the above-mentioned six-bevel tip design, a fourth bevel is set between the two third bevels to reduce the height of the needle tip edge line, so that the contact area between the needle tip and the skin or tissue is further reduced, so that the needle tip has less puncture resistance when it just penetrates the skin, preventing skin tissue rupture.

[0032] 2. The rotation angle between the fourth bevel and the first bevel is 0°, which can inhibit the rotation of the needle to a certain extent during puncture and improve the stability of puncture;

[0033] 3. The second inclination angle is slightly larger than the first inclination angle, so that the needle has a smoother transition from the second inclination to the first inclination, further reducing the force required to penetrate the skin or tissue, making the cutting action of the needle smoother during the puncture process, thereby reducing pain. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Attached Figure 1 A three-dimensional diagram of an embodiment of a six-bevel needle tube of the present invention;

[0035] Attached Figure 2 A schematic diagram of a first inclination angle of a six-bevel needle tube embodiment of the present invention;

[0036] Attached Figure 3 for Figure 2 Left view of

[0037] Attached Figure 4 Schematic diagram of the second inclination angle of the six-bevel needle tube embodiment of the present invention;

[0038] Attached Figure 5 A schematic diagram of a third inclination angle of a six-bevel needle tube embodiment of the present invention;

[0039] Attached Figure 6It is a schematic plan view of an embodiment of a six-bevel needle tube of the present invention;

[0040] Attached Figure 7 for Figure 6 AA section view;

[0041] Attached Figure 8 for Figure 6 BB section view

[0042] Attached Fig. 9 The graph is a graph showing the variation of the puncture force (resistance experienced by the needle tip) of the five-bevel needle tube over time, shown by the experimental data of Example 1 of the present utility model.

[0043] In the above figures: 1. needle tube; 11. multi-bevel tip; 111. first bevel; 112. second bevel; 113. third bevel; 114. first ridge; 115. second ridge; 116. fourth bevel; 117. third ridge; 118. 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; L4. fourth length. DETAILED DESCRIPTION

[0044] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0045] Embodiment 1: A six-bevel needle tube

[0046] like Figure 1-8 As shown, the six-bevel needle tube includes: needle tube 1 ( Figure 1 ), the needle tube 1 has a central axis 12 ( Figure 2 , Figure 4 and Figure 5 ), one end of the needle tube 1 is provided with a multi-bevel tip 11 ( Figure 1 and Figure 6 ), the multi-bevel tip 11 is provided with an opening 118 for fluid output or injection ( Figure 1 ), a first inclined surface 111, two second inclined surfaces 112, two third inclined surfaces 113 and a fourth inclined surface 116 are arranged around the opening 118 ( Figure 1 and Figure 6 ).

[0047] 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 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 and rear ends. The "front" in "front end" refers to the direction pointed by the needle tip. The "rear" in "rear end" refers to the opposite direction of "front". At the same time, the plane passing through the central axis 12 of the needle tube 1 and symmetrically dividing the needle tube 1 in half is defined as the first reference plane X (see Figure 3 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 Figure 3 The first reference plane X defines the meaning of "symmetrically bisecting the needle tube" as cutting the needle tube 1 into two halves with mutually symmetrical structures through the central axis 12. That is, the first reference plane X is cutting the needle tube 1 into two halves with mutually symmetrical structures. If the mutual symmetry of the two halves cannot be maintained after cutting, then this cutting does not meet the meaning of bisecting the needle tube.

[0048] The first bevel 111 is located at the base of the multi-bevel tip 11 (see Figure 1 ), the first inclined surface 111 is symmetrically arranged with respect to the first reference plane X (see Figure 3 The first inclined surface 111 has a first inclination angle a relative to the central axis 12 (see Figure 2 ), the first inclination angle a is 10°±2°, preferably 10°±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 Figure 3 , Figure 6 , Figure 7 and Figure 8 ).

[0049] The two second bevels 112 are located in the middle of the multi-bevel tip 11 (see Figure 1 and Figure 6 ), the two second inclined surfaces 112 are arranged symmetrically with respect to the first reference plane X (see Figure 3 and Figure 6 ), one end of the two second inclined surfaces 112 intersects with the first inclined surface 111 to form two first ridges 114 (see Figure 1 and Figure 6 The second inclined surface 112 has a second inclination angle b relative to the central axis 12 (see Figure 4 ), the second inclination angle b is 12°±2°, preferably 12°±1°. The second inclined surface 112 has a second rotation angle α (see FIG. 1 ) relative to the second reference plane Y with the central axis 12 as the rotation axis. Figure 8 ), the second rotation angle α is 23°±5°, preferably 23°±3°.

[0050] The two third bevels 113 are located at the tip of the multi-bevel tip 11 (see Figure 1 and Figure 6 ), the two third inclined surfaces 113 are arranged symmetrically with respect to the first reference plane X (see Figure 3 ), one end of each third inclined surface 113 intersects with a corresponding second inclined surface 112 to form a second ridge line 115 (see Figure 1 and Figure 6 ), the other end of each third bevel 113 extends to the tip of the multi-bevel tip 11 (see Figure 1 and Figure 6 ), the other ends of the two third inclined surfaces 113 converge at the tip to form two side edges of the needle tip. The third inclined surface 113 has a third inclination angle c relative to the central axis 12 (see Figure 5 ), the third inclination angle c is 19°±2°, preferably 19°±1°, and the third inclined surface 113 has a third rotation angle β (see Figure 7 ), the third rotation angle β is 35°±5°, preferably 35°±3°.

[0051] The fourth bevel 116 is located at the tip of the multi-bevel tip 11 (see Figure 1 and Figure 6 ), the fourth inclined surface 116 is symmetrically arranged with respect to the first reference plane X (see Figure 3 ), the fourth inclined surface 116 intersects with the third inclined surface 113 to form a third ridgeline 117 (see Figure 1 and Figure 6 ), the fourth bevel 116 forms the positive edge surface of the needle tip, the positive edge surface is located between the two side edge surfaces and together form a three-edge needle tip (see Figure 1 and Figure 6 The fourth inclined surface 116 has a fourth inclination angle d relative to the central axis 12 (see Figure 2 ), the fourth inclination angle d is 17°±2°, preferably 17°±1°. The fourth inclined surface 116 has a fourth rotation angle relative to the second reference plane Y with the central axis 12 as the rotation axis, and the fourth rotation angle is 0° (see Figure 3 and Figure 6 ).

[0052] In this embodiment, the third inclination angle c>the fourth inclination angle d, the fourth inclination angle d>the second inclination angle b, and the second inclination angle b>the first inclination angle a.

[0053] In this embodiment, the first inclined surface 111 is located on one side of the second reference plane Y, the fourth inclined surface 116 and the two third inclined surfaces 113 are located on the other side of the second reference plane Y, and the two second inclined surfaces 112 intersect with the second reference plane Y (see Figure 3 ).

[0054] In this embodiment, the projection distance from the needle tip to the rear end of the fourth bevel 116 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 third bevel 113 on the central axis 12 is defined as the second length L2, 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 third length L3, 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 fourth length L4, then:

[0055] The first length L1 is less than the second length L2 and the third length L3 is less than the fourth length L4 (see Figure 6 ).

[0056] 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).

[0057] 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.

[0058] The experimental data and their descriptions are as follows:

[0059] The needle tube 1 of this embodiment uses 31G×5mm as the test object, and the experimental platform is built according to the national standard "Disposable Sterile Injection Needles" (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 clamp is designed, and the diameter of the exposed area after clamping is 10mm. The Instron5900 testing machine is used to clamp the needle and puncture the material to be tested vertically 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 (where the second inclination angle, the third inclination angle, the second rotation angle, and the third rotation angle are all averaged) are as follows:

[0060] Angle name First tilt angle The second tilt angle The third inclination angle Fourth tilt angle The second rotation angle The third rotation angle Angle value 10.5° 11.2° 19.4° 16.2° 25.6° 36.4°

[0061] Combined with the experimental data obtained, the needle insertion process of the needle tube in this embodiment can be divided into four stages, such as Fig. 9 The first stage: the surface of the polyurethane film contacts the needle tip and deforms under the action of the needle tip displacement. The needle tip does not pierce the surface, and the needle resistance gradually increases. Fig. 9The 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 third inclined surface 113 and the fourth inclined surface 116 penetrate the film, the film stress is released to a certain extent, the needle resistance decreases, and the first peak is formed; in this process, since the fourth inclined angle is small, the ridge height is reduced, so the peak resistance when the needle tip pierces the film is small, which corresponds to the data. Fig. 9 The third stage: the contact area between the multi-bevel tip 11 and the polyurethane film gradually increases. During this process, since the second inclination angle and the first inclination angle are relatively small, the second inclination angle is slightly larger than the first inclination angle, and the second rotation angle is relatively small, the puncture resistance changes more slowly from the second bevel 112 to the first bevel 111, making the cutting action of the needle smooth during the puncture process, preventing the puncture resistance from rising sharply and thus increasing the pain. The data corresponds to Fig. 9 The fourth stage: the first bevel 111 of the multi-bevel tip 11 penetrates the polyurethane film to form a second peak, which corresponds to the data Fig. 9 Middle d1 stage.

[0062] Example 2: A syringe assembly with a six-bevel needle

[0063] 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 six-bevel needle tube of Example 1. The description will not be repeated here.

[0064] Example 3: A blood collection device with a six-bevel needle tube

[0065] 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 six-bevel needle tube of Example 1. The description will not be repeated here.

[0066] With respect to the above-mentioned embodiment, possible changes of the present invention are described as follows:

[0067] 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.

[0068] 2. In the above embodiment 1, the needle tube 1 is selected as 32G. 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.

[0069] 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 and the fourth bevel 114 are ground. For another example, the second bevel 112 is ground first, and then the first bevel 111 and the third bevel 113 are ground, and finally the fourth bevel 114 is ground.

[0070] 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

1. A six-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 (118) for fluid output or injection, and a first bevel (111), two second bevels (112), two third bevels (113) and a fourth bevel (116) being provided around the opening (118); 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°; The two second inclined surfaces (112) are located in the middle of the multi-inclined 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); the second inclined surfaces (112) have a second inclination angle (b) relative to the central axis (12); and the second inclined surfaces (112) have a second rotation angle (α) relative to the second reference plane (Y) with the central axis (12) as a rotation axis; The two third inclined surfaces (113) are located at the tip of the multi-bevel tip (11), the two third inclined surfaces (113) are symmetrically arranged relative to each other with the first reference plane (X) as a reference, one end of each third inclined surface (113) intersects with a corresponding second inclined surface (112) to form a second ridgeline (115), the other end of each third inclined surface (113) extends to the tip of the multi-bevel tip (11), and the other ends of the two third inclined surfaces (113) converge at the tip to form two side ridges of the needle tip; 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 plane (Y) with the central axis (12) as a rotation axis; Features: The fourth inclined surface (116) is located at the tip of the multi-bevel tip (11), the fourth inclined surface (116) is symmetrically arranged with the first reference plane (X) as a reference, the fourth inclined surface (116) intersects with the third inclined surface (113) to form a third ridgeline (117), the fourth inclined surface (116) forms a positive ridge surface of the needle tip, the positive ridge surface is located between the two side ridge surfaces and together form a triangular ridge needle tip; the fourth inclined surface (116) has a fourth inclination angle (d) relative to the central axis (12), the fourth inclined surface (116) has a fourth rotation angle relative to the second reference plane (Y) with the central axis (12) as a rotation axis, and the fourth rotation angle is 0°; The first inclination angle (a) is 10°±2°, the second inclination angle (b) is 12°±2°, the third inclination angle (c) is 19°±2°, and the fourth inclination angle (d) is 17°±2°, wherein the third inclination angle (c)>the fourth inclination angle (d), the fourth inclination angle (d)>the second inclination angle (b), and the second inclination angle (b)>the first inclination angle (a); The second rotation angle (α) is 23°±5°, and the third rotation angle (β) is 35°±5°.

2. The six-bevel needle tube according to claim 1, characterized in that: The first inclined surface (111) is located on one side of the second reference surface (Y), the fourth inclined surface (116) and the two third inclined surfaces (113) are located on the other side of the second reference surface (Y), and the two second inclined surfaces (112) intersect with the second reference surface (Y).

3. The six-bevel needle tube according to claim 1, characterized in that: The projection distance from the needle tip to the rear end of the fourth bevel (116) 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 third bevel (113) on the central axis (12) is defined as a second length (L2), 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 third length (L3), 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 fourth length (L4), then: The first length (L1) is less than the second length (L2) and the third length (L3) is less than the fourth length (L4).

4. The six-bevel needle tube according to claim 1, characterized in that: The first inclination angle (a) is 10°±1°.

5. The six-bevel needle tube according to claim 1, characterized in that: The second inclination angle (b) is 12°±1°.

6. The six-bevel needle tube according to claim 1, characterized in that: The third inclination angle (c) is 19°±1°.

7. The six-bevel needle tube according to claim 1, characterized in that: The fourth inclination angle (d) is 17°±1°.

8. The six-bevel needle tube according to claim 1, characterized in that: The second rotation angle (α) is 23°±3°, and the third rotation angle (β) is 35°±3°.

9. A syringe assembly with a six-bevel needle tube, 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 (118) for fluid output or injection; a first bevel (111), two second bevels (112), two third bevels (113) and a fourth bevel (116) are provided around the opening (118); 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°; The two second inclined surfaces (112) are located in the middle of the multi-inclined 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); the second inclined surfaces (112) have a second inclination angle (b) relative to the central axis (12); and the second inclined surfaces (112) have a second rotation angle (α) relative to the second reference plane (Y) with the central axis (12) as a rotation axis; The two third inclined surfaces (113) are located at the tip of the multi-bevel tip (11), the two third inclined surfaces (113) are symmetrically arranged relative to each other with the first reference plane (X) as a reference, one end of each third inclined surface (113) intersects with a corresponding second inclined surface (112) to form a second ridgeline (115), the other end of each third inclined surface (113) extends to the tip of the multi-bevel tip (11), and the other ends of the two third inclined surfaces (113) converge at the tip to form two side ridges of the needle tip; 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 plane (Y) with the central axis (12) as a rotation axis; Features: The fourth inclined surface (116) is located at the tip of the multi-bevel tip (11), the fourth inclined surface (116) is symmetrically arranged with the first reference plane (X) as a reference, the fourth inclined surface (116) intersects with the third inclined surface (113) to form a third ridgeline (117), the fourth inclined surface (116) forms a positive ridge surface of the needle tip, the positive ridge surface is located between the two side ridge surfaces and together form a triangular ridge needle tip; the fourth inclined surface (116) has a fourth inclination angle (d) relative to the central axis (12), the fourth inclined surface (116) has a fourth rotation angle relative to the second reference plane (Y) with the central axis (12) as a rotation axis, and the fourth rotation angle is 0°; The first inclination angle (a) is 10°±2°, the second inclination angle (b) is 12°±2°, the third inclination angle (c) is 19°±2°, and the fourth inclination angle (d) is 17°±2°, wherein the third inclination angle (c)>the fourth inclination angle (d), the fourth inclination angle (d)>the second inclination angle (b), and the second inclination angle (b)>the first inclination angle (a); The second rotation angle (α) is 23°±5°, and the third rotation angle (β) is 35°±5°.

10. A blood collection device with a six-bevel needle tube, 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 (118) for fluid output or injection; a first bevel (111), two second bevels (112), two third bevels (113) and a fourth bevel (116) are provided around the opening (118); 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°; The two second inclined surfaces (112) are located in the middle of the multi-inclined 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); the second inclined surfaces (112) have a second inclination angle (b) relative to the central axis (12); and the second inclined surfaces (112) have a second rotation angle (α) relative to the second reference plane (Y) with the central axis (12) as a rotation axis; The two third inclined surfaces (113) are located at the tip of the multi-bevel tip (11), the two third inclined surfaces (113) are symmetrically arranged relative to each other with the first reference plane (X) as a reference, one end of each third inclined surface (113) intersects with a corresponding second inclined surface (112) to form a second ridgeline (115), the other end of each third inclined surface (113) extends to the tip of the multi-bevel tip (11), and the other ends of the two third inclined surfaces (113) converge at the tip to form two side ridges of the needle tip; 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 plane (Y) with the central axis (12) as a rotation axis; Features: The fourth inclined surface (116) is located at the tip of the multi-bevel tip (11), the fourth inclined surface (116) is symmetrically arranged with the first reference plane (X) as a reference, the fourth inclined surface (116) intersects with the third inclined surface (113) to form a third ridgeline (117), the fourth inclined surface (116) forms a positive ridge surface of the needle tip, the positive ridge surface is located between the two side ridge surfaces and together form a triangular ridge needle tip; the fourth inclined surface (116) has a fourth inclination angle (d) relative to the central axis (12), the fourth inclined surface (116) has a fourth rotation angle relative to the second reference plane (Y) with the central axis (12) as a rotation axis, and the fourth rotation angle is 0°; The first inclination angle (a) is 10°±2°, the second inclination angle (b) is 12°±2°, the third inclination angle (c) is 19°±2°, and the fourth inclination angle (d) is 17°±2°, wherein the third inclination angle (c)>the fourth inclination angle (d), the fourth inclination angle (d)>the second inclination angle (b), and the second inclination angle (b)>the first inclination angle (a); The second rotation angle (α) is 23°±5°, and the third rotation angle (β) is 35°±5°.

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