Pentasided needle cannula for injection and its manufacturing method

Abstract

The application discloses a five-bevel needle tube for injection and a manufacturing method thereof. The manufacturing method of the five-bevel needle tube for injection comprises the following steps: a needle tube positioning step, a fifth-bevel forming step, a fourth-bevel forming step, a third-bevel forming step, a second-bevel forming step and a first-bevel forming step. The five-bevel needle tube is manufactured by reasonably setting the machining cutting surface of the needle tube at each step, and the manufactured five-bevel needle tube can reduce the discomfort of a patient caused by piercing the skin or tissue of the patient to the maximum extent. The five-bevel needle tube provides five bevels to form a needle tip at the disclosed inclination and rotation angles, and the cumulative effect of the five bevels can reduce the force required for penetrating human tissue / inserting a medium. Since the first bevel, the second bevel, the third bevel, the fourth bevel and the fifth bevel are gently changed, only a small penetration force is required for inserting the needle tube into the tissue of the patient, and the discomfort degree of the patient is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of injection needle tube, in particular to a five-bevel needle tube for injection and a manufacturing method thereof. BACKGROUND

[0002] The needle tube is used in hospitals to obtain samples from patients, such as blood sampling. The needle tube is formed by an elongated tube or cannula having a fluid conducting lumen and a central axis. The proximal end of the needle tube is typically configured to fit or be fixed to a fluid collection device, such as a syringe assembly or a blood collection assembly. The distal end of the needle tube is provided with a sharp tip geometry for piercing the skin or tissue of a patient to obtain a sample from the patient. However, it is difficult to manufacture a needle tube with a complex sharp tip geometry, resulting in a lack of needle tubes that effectively reduce patient discomfort. SUMMARY

[0003] The present application provides a five-bevel needle tube for injection and a manufacturing method thereof. The five-bevel needle tube with a complex sharp tip geometry can be manufactured, and the manufactured five-bevel needle tube can minimize patient discomfort caused by piercing the skin or tissue of a patient.

[0004] The present application provides a manufacturing method of a five-bevel needle tube for injection, which comprises:

[0005] A needle tube positioning step, which positions the needle tube on a grinding tool, with the central axis of the needle tube at a first inclined angle with the vertical direction as the starting position, and takes the vertical cross section of the needle tube at the starting position as the reference surface;

[0006] A fifth bevel forming step, which rotates the reference surface of the needle tube around the central axis by a first rotation angle in the counterclockwise direction, adjusts the central axis of the needle tube to be at a fifth inclined angle with the vertical direction, and grinds the inclined surface of the needle tube with the vertically arranged grinding tool to form a fifth bevel; wherein the fifth inclined angle is smaller than the first inclined angle;

[0007] A fourth bevel forming step, which keeps the needle tube from rotating, adjusts the central axis of the needle tube to be at a fourth inclined angle with the vertical direction, and grinds the inclined surface of the needle tube with the vertically arranged grinding tool to form a fourth bevel; wherein the fourth inclined angle is greater than the first inclined angle, and the fourth bevel intersects with the fifth bevel;

[0008] A third bevel forming step, which keeps the needle tube from rotating, adjusts the central axis of the needle tube to be at a third inclined angle with the vertical direction, and grinds the inclined surface of the needle tube with the vertically arranged grinding tool to form a third bevel; wherein the third inclined angle is greater than the fourth inclined angle, and the third bevel intersects with the fourth bevel;

[0009] forming a second bevel step, which is to keep the center axis of the needle tube unchanged with the third inclined angle with the vertical direction, rotate the reference surface of the needle tube around the center axis in the clockwise direction by the first rotation angle, and continue to rotate the reference surface of the needle tube around the center axis in the clockwise direction by the second rotation angle, and grind the inclined needle tube surface by the vertically arranged grinding tool to form a second bevel; wherein the second inclined angle is equal to the first inclined angle, and the second bevel intersects with the third bevel;

[0010] forming a first bevel step, which is to rotate the reference surface of the needle tube around the center axis in the counterclockwise direction by the first rotation angle, and adjust the center axis of the needle tube to return to the starting position with the first inclined angle with the vertical direction, grind the inclined needle tube surface by the vertically arranged grinding tool to form a first bevel, and form a five-bevel needle tube; the first bevel intersects with the second bevel and the fifth bevel.

[0011] Further, before the needle tube positioning step, it further includes:

[0012] making a cross-section step, which is to position the needle tube on the grinding tool, the center axis of the needle tube is inclined to the vertical direction by the first inclined angle, and grind the inclined needle tube surface by the vertically arranged grinding tool to form a cross-section along the vertical direction.

[0013] Further, after the forming a first bevel step, it further includes:

[0014] taking down the five-bevel needle tube made from the grinding tool.

[0015] Further, after the taking down the five-bevel needle tube made from the grinding tool step, it further includes:

[0016] keeping the position of the grinding tool unchanged, and positioning another needle tube on the grinding tool to complete the needle tube positioning step of another needle tube;

[0017] sequentially performing the forming a fifth bevel step to the forming a first bevel step to complete the making of another needle tube to form another five-bevel needle tube.

[0018] Further, in the needle tube positioning step, the first inclination angle is in the range of 11.5°±0.5°; in the fifth bevel forming step, the first rotation angle is 30°±0.5°, and the fifth inclination angle is in the range of 10°±1°; in the fourth bevel forming step, the fourth inclination angle is in the range of 13.5°±1.5°; in the third bevel forming step, the third inclination angle is in the range of 18.5°±0.5°; and in the second bevel forming step, the second rotation angle is 30°±0.5°, and the second inclination angle is in the range of 18.5°±0.5°.

[0019] Further, in the first bevel forming step, in the formed five-bevel needle tube, the length of the first bevel along the central axis is in the range of 1.87mm±0.02mm, the length of the second bevel along the central axis is in the range of 0.97mm±0.04mm, the length of the third bevel along the central axis is in the range of 0.63mm±0.02mm, the length of the fourth bevel along the central axis is in the range of 1.11mm±0.08mm, and the length of the fifth bevel along the central axis is in the range of 1.69mm±0.05mm.

[0020] The application also provides a five-bevel needle tube for injection, which is formed by the method for manufacturing a five-bevel needle tube for injection described above. The five-bevel needle tube comprises a needle tube having a cavity, a needle tip at the front end of the needle tube, and a first bevel, a second bevel, a third bevel, a fourth bevel, and a fifth bevel adjacently arranged to form the needle tip.

[0021] Further, the rotation angle of the third bevel, the fourth bevel, and the fifth bevel relative to the first bevel is a first rotation angle in the counterclockwise direction around the central axis of the needle tube, and the first rotation angle is 30°±0.5°; and the rotation angle of the second bevel relative to the first bevel is a second rotation angle in the clockwise direction around the central axis of the needle tube, and the second rotation angle is 30°±0.5°.

[0022] Further, the first inclined surface has a first inclined angle with the central axis of the needle tube, the first inclined angle is in a range of 11.5°±0.5°; the second inclined surface has a second inclined angle with the central axis of the needle tube, the second inclined angle is in a range of 18.5°±0.5°; the third inclined surface has a third inclined angle with the central axis of the needle tube, the third inclined angle is in a range of 18.5°±0.5°; the fourth inclined surface has a fourth inclined angle with the central axis of the needle tube, the fourth inclined angle is in a range of 13.5°±1.5°; the fifth inclined surface has a fifth inclined angle with the central axis of the needle tube, the fifth inclined angle is in a range of 10°±1°.

[0023] Further, the length of the first inclined surface along the central axis is in a range of 1.87mm±0.02mm, the length of the second inclined surface along the central axis is in a range of 0.97mm±0.04mm, the length of the third inclined surface along the central axis is in a range of 0.63mm±0.02mm, the length of the fourth inclined surface along the central axis is in a range of 1.11mm±0.08mm, the length of the fifth inclined surface along the central axis is in a range of 1.69mm±0.05mm.

[0024] The five-inclined-surface needle tube for injection and the manufacturing method thereof provided by the embodiments of the present application realize the manufacturing of the five-inclined-surface needle tube by reasonably setting the machining cutting surface of the needle tube at each step, and the manufactured five-inclined-surface needle tube can minimize the discomfort of the patient caused by piercing the skin or tissue of the patient. The five-inclined-surface needle tube provides five inclined surfaces to form a needle tip at the disclosed inclined and rotation angles, and the cumulative effect of the five inclined surfaces can reduce the force required for penetrating the human tissue / inserting the medium. Since the first inclined surface, the second inclined surface, the third inclined surface, the fourth inclined surface and the fifth inclined surface are smoothly changed, only a small penetration force is required to insert the needle tube into the tissue of the patient, thereby reducing the discomfort of the patient. BRIEF DESCRIPTION OF DRAWINGS

[0025] The technical solutions and other beneficial effects of the present application will be apparent to those skilled in the art through the following detailed description of the specific embodiments of the present application combined with the accompanying drawings.

[0026] Figure 1 The flowchart of the manufacturing method of the five-inclined-surface needle tube for injection provided by the embodiments of the present application.

[0027] Figure 2 The manufacturing schematic diagram of the step of forming the fifth inclined surface provided by the embodiments of the present application.

[0028] Figure 3 The manufacturing schematic diagram of the step of forming the fourth inclined surface provided by the embodiments of the present application.

[0029] Figure 4 The manufacturing schematic diagram of forming the third inclined surface step provided for the embodiment of the present application.

[0030] Figure 5 The manufacturing schematic diagram of forming the second inclined surface step provided for the embodiment of the present application.

[0031] Figure 6 The manufacturing schematic diagram of forming the first inclined surface step provided for the embodiment of the present application.

[0032] Figure 7 The front view of the five-inclined-surface needle tube for injection provided for the embodiment of the present application.

[0033] Figure 8 The side view of the five-inclined-surface needle tube for injection provided for the embodiment of the present application.

[0034] Figure 9 The first perspective structural schematic diagram of the five-inclined-surface needle tube for injection provided for the embodiment of the present application.

[0035] Figure 10 The second perspective structural schematic diagram of the five-inclined-surface needle tube for injection provided for the embodiment of the present application.

[0036] The figures are identified as follows:

[0037] 1. The first inclined surface, 2. The second inclined surface, 3. The third inclined surface, 4. The fourth inclined surface, 5. The fifth inclined surface, 6. The needle tube, 7. The central axis. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by a person skilled in the art without any creative work are within the scope of protection of the present application.

[0039] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified.

[0040] Embodiment 1

[0041] Specifically, referring to Figure 1 The embodiment 1 of the present application provides a manufacturing method of a five-bevel needle tube for injection, which comprises:

[0042] S1, a needle tube positioning step, which is to position the needle tube on a grinding tool, taking the position where the center axis of the needle tube forms a first inclined angle with the vertical direction as the starting position, and taking the vertical cross section of the needle tube at the starting position as the reference surface;

[0043] S2, a fifth bevel forming step, which is to rotate the reference surface of the needle tube around the center axis counterclockwise by a first rotation angle, adjust the center axis of the needle tube to form a fifth inclined angle with the vertical direction, and grind the inclined surface of the needle tube by the vertically arranged grinding tool to form a fifth bevel; wherein the fifth inclined angle is smaller than the first inclined angle;

[0044] S3, a fourth bevel forming step, which is to keep the needle tube from rotating, adjust the center axis of the needle tube to form a fourth inclined angle with the vertical direction, and grind the inclined surface of the needle tube by the vertically arranged grinding tool to form a fourth bevel; wherein the fourth inclined angle is greater than the first inclined angle, and the fourth bevel intersects with the fifth bevel;

[0045] S4, a third bevel forming step, which is to keep the needle tube from rotating, adjust the center axis of the needle tube to form a third inclined angle with the vertical direction, and grind the inclined surface of the needle tube by the vertically arranged grinding tool to form a third bevel; wherein the third inclined angle is greater than the fourth inclined angle, and the third bevel intersects with the fourth bevel;

[0046] S5, a second bevel forming step, which is to keep the center axis of the needle tube unchanged with a third inclined angle with the vertical direction, rotate the reference surface of the needle tube around the center axis by a first rotation angle in the clockwise direction, and continue to rotate the reference surface of the needle tube around the center axis by a second rotation angle in the clockwise direction, and grind the inclined needle tube surface by a vertically arranged grinding tool to form a second bevel; wherein the second inclined angle is equal to the first inclined angle, and the second bevel intersects with the third bevel;

[0047] S6, a first bevel forming step, which is to rotate the reference surface of the needle tube around the center axis by a first rotation angle in the counterclockwise direction, and adjust the center axis of the needle tube to return to the starting position with a first inclined angle with the vertical direction, grind the inclined needle tube surface by a vertically arranged grinding tool to form a first bevel, and form a five-bevel needle tube; the first bevel intersects with the second bevel and the fifth bevel.

[0048] As shown in Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 , the grinding tool is preferably a grinding wheel. The grinding surface of the grinding wheel is always vertically arranged to grind the surface of the needle tube to form five bevels. Among them Figure 2 is a manufacturing schematic diagram of the fifth bevel forming step provided by the embodiment of the application. Figure 3 is a manufacturing schematic diagram of the fourth bevel forming step provided by the embodiment of the application. Figure 4 is a manufacturing schematic diagram of the third bevel forming step provided by the embodiment of the application. Figure 5 is a manufacturing schematic diagram of the second bevel forming step provided by the embodiment of the application. Figure 6 is a manufacturing schematic diagram of the first bevel forming step provided by the embodiment of the application.

[0049] The structure of the five-bevel needle tube formed is as shown in Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 , Figure 7 is a front view of the five-bevel needle tube for injection provided by the embodiment of the application. Figure 8 is a side view of the five-bevel needle tube for injection provided by the embodiment of the application. Figure 9 is a first perspective view of the five-bevel needle tube for injection provided by the embodiment of the application. Figure 10 is a second perspective view of the five-bevel needle tube for injection provided by the embodiment of the application.

[0050] The embodiment realizes the manufacturing of the five-bevel needle tube by reasonably setting the machining cutting surface of the needle tube at each step, and the manufactured five-bevel needle tube can minimize the discomfort of the patient caused by piercing the skin or tissue of the patient.

[0051] Further, the needle tube positioning step further comprises:

[0052] The manufacturing section step is that the needle tube is positioned on the grinding tool, the central axis of the needle tube is at a first inclined angle with the vertical direction, and the surface of the inclined needle tube is ground by the vertically arranged grinding tool to form a section along the vertical direction.

[0053] The first inclined angle of the needle tube positioned on the grinding tool is reduced by first manufacturing the section as a reference surface before the needle tube positioning step.

[0054] As shown in the first inclined surface forming step, the method further comprises: Figure 1

[0055] S7, the manufactured five-bevel needle tube is removed from the grinding tool.

[0056] As shown in the step of removing the manufactured five-bevel needle tube from the grinding tool, the method further comprises: Figure 1

[0057] S8, the position of the grinding tool is kept unchanged, and another needle tube is positioned on the grinding tool to complete the needle tube positioning step of another needle tube;

[0058] S9, sequentially performing the fifth inclined surface forming step to the first inclined surface forming step to complete the manufacturing of another needle tube to form another five-bevel needle tube.

[0059] The steps S1-S9 are comprehensively set in the application to realize the manufacturing method of continuously generating the five-bevel needle tube, which can directly link the process steps and can cyclically manufacture the five-bevel needle tube.

[0060] Further, in the needle tube positioning step, the angle of the first inclined angle is within the range of 11.5°±0.5°; in the fifth inclined surface forming step, the first rotation angle is 30°±0.5°, and the angle of the fifth inclined angle is within the range of 10°±1°; in the fourth inclined surface forming step, the angle of the fourth inclined angle is within the range of 13.5°±1.5°; in the third inclined surface forming step, the angle of the third inclined angle is within the range of 18.5°±0.5°; in the second inclined surface forming step, the second rotation angle is 30°±0.5°, and the angle of the second inclined angle is within the range of 18.5°±0.5°.

[0061] ​​Further, in the forming the first bevel step, in the formed five-bevel needle tube, the length of the first bevel along the central axis is in the range of 1.87mm±0.02mm, the length of the second bevel along the central axis is in the range of 0.97mm±0.04mm, the length of the third bevel along the central axis is in the range of 0.63mm±0.02mm, the length of the fourth bevel along the central axis is in the range of 1.11mm±0.08mm, and the length of the fifth bevel along the central axis is in the range of 1.69mm±0.05mm.

[0062] Embodiment 2

[0063] As shown in Figure 7 , Figure 8 , Figure 9 , Figure 10 Embodiment 2 of the present application provides a five-bevel needle tube for injection, which is formed by the manufacturing method of the five-bevel needle tube for injection described in Embodiment 1; the five-bevel needle tube comprises a needle tube, the needle tube has a cavity, the front end of the needle tube has a needle tip, and the first bevel, the second bevel, the third bevel, the fourth bevel and the fifth bevel are adjacently arranged to form the needle tip.

[0064] Further, the rotation angle of the third bevel, the fourth bevel and the fifth bevel relative to the first bevel is a first rotation angle in the counterclockwise direction around the central axis of the needle tube, and the first rotation angle is 30°±0.5°; and the rotation angle of the second bevel relative to the first bevel is a second rotation angle in the clockwise direction around the central axis of the needle tube, and the second rotation angle is 30°±0.5°.

[0065] It can be understood that the first rotation angle and the second rotation angle are both in the form of the first bevel rotating in different directions, and the rotation angles are equal in size.

[0066] Further, the first bevel and the central axis of the needle tube form a first inclination angle, the angle of the first inclination angle is in the range of 11.5°±0.5°; the second bevel and the central axis of the needle tube form a second inclination angle, the angle of the second inclination angle is in the range of 18.5°±0.5°; the third bevel and the central axis of the needle tube form a third inclination angle, the angle of the third inclination angle is in the range of 18.5°±0.5°; the fourth bevel and the central axis of the needle tube form a fourth inclination angle, the angle of the fourth inclination angle is in the range of 13.5°±1.5°; and the fifth bevel and the central axis of the needle tube form a fifth inclination angle, the angle of the fifth inclination angle is in the range of 10°±1°.

[0067] Further, the length of the first inclined surface along the central axis is in the range of 1.87mm±0.02mm, the length of the second inclined surface along the central axis is in the range of 0.97mm±0.04mm, the length of the third inclined surface along the central axis is in the range of 0.63mm±0.02mm, the length of the fourth inclined surface along the central axis is in the range of 1.11mm±0.08mm, and the length of the fifth inclined surface along the central axis is in the range of 1.69mm±0.05mm.

[0068] The five-inclined-surface needle tube for injection and the manufacturing method thereof provided by the embodiments of the present application realize the manufacturing of the five-inclined-surface needle tube by reasonably setting the machining cutting surface of the needle tube at each step, and the manufactured five-inclined-surface needle tube can minimize the discomfort of the patient caused by the penetration of the skin or tissue of the patient. The five-inclined-surface needle tube provides five inclined surfaces to form a needle tip at the disclosed inclination and rotation angles, and the cumulative effect of the five inclined surfaces can reduce the force required for penetrating the human tissue / inserting the medium. Since the first inclined surface, the second inclined surface, the third inclined surface, the fourth inclined surface and the fifth inclined surface are smoothly changed, only a small penetration force is required to insert the needle tube into the tissue of the patient, thereby reducing the discomfort of the patient.

[0069] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0070] The five-inclined-surface needle tube for injection provided by the embodiments of the present application is described in detail, and the principle and implementation manner of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the technical solutions and the core idea of the present application; the person skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for manufacturing a five-beveled injection syringe, characterized in that, include: The needle positioning step involves positioning the needle on the grinding tool, with the position where the central axis of the needle forms a first inclination angle with the vertical direction as the starting position, and the vertical cross-section of the needle at the starting position as the reference plane. The step of forming the fifth inclined surface involves rotating the reference surface of the needle tube counterclockwise by a first rotation angle around the central axis, adjusting the central axis of the needle tube to form a fifth inclination angle with the vertical direction, and grinding the inclined needle tube surface with a vertically set grinding tool to form the fifth inclined surface; wherein the fifth inclination angle is smaller than the first inclination angle. The step of forming the fourth inclined surface involves adjusting the central axis of the needle tube to a fourth angle with the vertical direction to keep the needle tube from rotating, and then grinding the inclined surface of the needle tube with a vertically set grinding tool to form the fourth inclined surface; wherein the fourth angle of inclination is greater than the first angle of inclination, and the fourth inclined surface intersects with the fifth inclined surface; The step of forming the third inclined surface involves adjusting the central axis of the needle tube to form a third inclination angle with the vertical direction to keep the needle tube from rotating, and then grinding the inclined surface of the needle tube with a vertically set grinding tool to form the third inclined surface; wherein the third inclination angle is greater than the fourth inclination angle, and the third inclined surface intersects with the fourth inclined surface; The step of forming the second inclined surface involves maintaining the central axis of the needle at a third angle to the vertical direction, rotating the reference surface of the needle clockwise around the central axis by a first rotation angle, and then rotating the reference surface of the needle clockwise around the central axis by a second rotation angle. The inclined surface of the needle is then ground using a vertically positioned grinding tool to form the second inclined surface. The second angle is equal to the first angle, and the second inclined surface intersects with the third inclined surface. The first inclined surface step involves rotating the reference surface of the needle tube counterclockwise by a first rotation angle around the central axis, adjusting the central axis of the needle tube to return to the starting position at a first tilt angle with the vertical direction, and grinding the inclined needle tube surface with a vertically set grinding tool to form the first inclined surface, thus forming a five-inclined needle tube; the first inclined surface intersects with the second and fifth inclined surfaces.

2. The method for manufacturing a five-beveled injection syringe as described in claim 1, characterized in that, The procedure prior to the needle positioning step also includes: The process of creating the cross-section involves positioning the needle on a grinding tool, with the central axis of the needle forming a first angle of inclination with the vertical direction, and grinding the inclined surface of the needle with the vertically positioned grinding tool to form a cross-section along the vertical direction.

3. The method for manufacturing a five-beveled injection syringe as described in claim 1, characterized in that, The process further includes, after the step of forming the first inclined plane: Remove the prepared five-beveled needle from the grinding tool.

4. The method for manufacturing a five-beveled injection syringe as described in claim 3, characterized in that, Following the step of removing the fabricated five-beveled syringe from the grinding tool, the method further includes: Keeping the position of the grinding tool unchanged, position another syringe on the grinding tool to complete the syringe positioning step for the other syringe; By sequentially performing the steps from forming the fifth bevel to forming the first bevel, another five-bevel syringe is created.

5. The method for manufacturing a five-beveled injection syringe as described in claim 1, characterized in that, In the needle positioning step, the angle of the first tilt angle is within the range of 11.5° ± 0.5°; In the step of forming the fifth inclined plane, the first rotation angle is 30°±0.5°, and the angle of the fifth inclination angle is within the range of 10°±1°; In the step of forming the fourth inclined plane, the angle of the fourth inclination angle is within the range of 13.5° ± 1.5°; In the step of forming the third inclined surface, the angle of the third inclination angle is within the range of 18.5° ± 0.5°; In the step of forming the second inclined plane, the second rotation angle is 30°±0.5°, and the angle of the second tilt angle is within the range of 18.5°±0.5°.

6. The method for manufacturing a five-beveled injection syringe as described in claim 1, characterized in that, In the step of forming the first bevel, in the five-bevel needle tube, the length of the first bevel along the central axis is in the range of 1.87mm ± 0.02mm, the length of the second bevel along the central axis is in the range of 0.97mm ± 0.04mm, the length of the third bevel along the central axis is in the range of 0.63mm ± 0.02mm, the length of the fourth bevel along the central axis is in the range of 1.11mm ± 0.08mm, and the length of the fifth bevel along the central axis is in the range of 1.69mm ± 0.05mm.

7. A five-beveled injection needle, characterized in that, The needle tube is manufactured using the method described in any one of claims 1 to 6 for injection; the five-beveled needle tube includes a needle tube having a cavity, and the front end of the needle tube having a needle tip, wherein the first bevel, the second bevel, the third bevel, the fourth bevel, and the fifth bevel are arranged adjacently to form the needle tip.

8. The five-beveled needle for injection as described in claim 7, characterized in that, The rotation angles of the third, fourth, and fifth inclined planes relative to the first inclined plane are all first rotation angles in a counterclockwise direction around the central axis of the needle tube, and the first rotation angle is 30°±0.5°; the rotation angles of the second inclined plane relative to the first inclined plane are all second rotation angles in a clockwise direction around the central axis of the needle tube, and the second rotation angle is 30°±0.5°.

9. The five-beveled injection needle as described in claim 8, characterized in that, The first inclined surface forms a first angle of inclination with the central axis of the needle tube, and the angle of the first angle of inclination is within the range of 11.5° ± 0.5°; the second inclined surface forms a second angle of inclination with the central axis of the needle tube, and the angle of the second angle of inclination is within the range of 18.5° ± 0.5°; the third inclined surface forms a third angle of inclination with the central axis of the needle tube, and the angle of the third angle of inclination is within the range of 18.5° ± 0.5°; the fourth inclined surface forms a fourth angle of inclination with the central axis of the needle tube, and the angle of the fourth angle of inclination is within the range of 13.5° ± 1.5°; the fifth inclined surface forms a fifth angle of inclination with the central axis of the needle tube, and the angle of the fifth angle of inclination is within the range of 10° ± 1°.

10. The five-beveled needle for injection as described in claim 9, characterized in that, The length of the first inclined plane along the central axis is in the range of 1.87mm ± 0.02mm, the length of the second inclined plane along the central axis is in the range of 0.97mm ± 0.04mm, the length of the third inclined plane along the central axis is in the range of 0.63mm ± 0.02mm, the length of the fourth inclined plane along the central axis is in the range of 1.11mm ± 0.08mm, and the length of the fifth inclined plane along the central axis is in the range of 1.69mm ± 0.05mm.

Images