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CN109806464A - A kind of injection needle tip and its manufacturing method - Google Patents

A kind of injection needle tip and its manufacturing method Download PDF

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Publication number
CN109806464A
CN109806464A CN201910158068.5A CN201910158068A CN109806464A CN 109806464 A CN109806464 A CN 109806464A CN 201910158068 A CN201910158068 A CN 201910158068A CN 109806464 A CN109806464 A CN 109806464A
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Prior art keywords
grinding
needle
plane
edge
needle tip
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CN201910158068.5A
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CN109806464B (en
Inventor
齐迎春
于庆宇
贺连彬
金敬福
韩丽曼
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Jilin University
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Jilin University
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Abstract

The present invention discloses a kind of injection needle needle point and its manufacturing method, injection needle needle point is made of the first inclined-plane, the second inclined-plane, third inclined-plane and inclination sword, needle point inclination sword is located at the tip of needle point, and the second inclined-plane and third inclined-plane are located at the front two sides of needle point, and the first inclined-plane is located at the rear of needle point；The inclination alpha on the first inclined-plane is 11~17 °；Second grinding surface inclination angle and inclination cutting edge inclination β are 35 °~55 °；The manufacturing method of the present invention is by changing grinding surface inclination angle, rotation axis and rotation angle in grinding process, keep manufactured injection needle needle point sharper, penetration Resistance when reducing injection, to make reaction force suffered by injection needle reduce, the accuracy for being pierced into direction is easier to ensure that when making to be needled into, inserting needle faster, reduces the stimulation to pain nerve, mitigates the pain of patient.

Description

A kind of injection needle needle point and its manufacturing method
Technical field
The present invention relates to a kind of injection needle needle point and its manufacturing methods, belong to area of medical devices.
Background technique
Injection needle is usually used in injection, venous blood collection of various medical fluids etc., needle point is by three inclined-planes as a kind of medical instrument Composition.When manufacture, it first is ground out the first inclined-plane along the first grinding surface with grinding sword, the first inclination angle of inclined plane is generally 11 ° or 17 °, Tolerance is positive and negative 2 °；Then grinding sword is adjusted to the second grinding surface inclination angle, and by needle tubing along needle tubing central axis clockwise or One rotation angle of rotation counterclockwise is ground the second inclined-plane；Needle tubing is finally rotated in the reverse direction into 2 times of rotation angles, grinding third is oblique Face.Second inclined-plane and third inclined-plane are symmetrically distributed in the first inclined-plane two sides, and the intersection on the second inclined-plane and third inclined-plane inclines for needle point Inclined edge, it is the second inclination angle of inclined plane or needle point inclination angle that needle point, which tilts sword and the angle of needle tubing central axis,.Needlepoint form and size shadow The puncture force when insertion tissue such as injection needle or blood taking needle is rung, puncture force is bigger, and human body pain is bigger, and be easy to cause The puncture direction of injection needle deviates.
Summary of the invention
In order to reduce puncture force, according to the relationship of needlepoint form and puncture force, the present invention provides a kind of puncture force is smaller Injection needle needle point and its manufacturing method.
A kind of injection needle needle point is made of the first inclined-plane, the second inclined-plane, third inclined-plane and inclination sword, and needle point tilts sword position In the tip of needle point, the second inclined-plane and third inclined-plane are located at the front two sides of needle point, and the first inclined-plane is located at the rear of needle point；
The inclination alpha on the first inclined-plane is 11~17 °；
Second grinding surface inclination angle angle of inclination beta is 35 °~55 °.
The manufacturing method of the present invention:
Needle point is cut and is formed by grinding sharpening, and when manufacture, needle tubing is blocked with fixture:
The first step, grinding sword are ground needle tubing along the first inclination angle of inclined plane α, obtain the first inclined-plane of needle point, the first grinding surface and the One inclined-plane has same inclination angle；
Cutting edge is moved on to initial position by second step, moves an offset l along needle tubing outer cylinder, then along the second mill The angle of inclination beta of bevel is ground needle tubing, obtains needle tubing section, and the second grinding surface and needle point ramp edge have same inclination angle；
Third step is handed over after grinding sword returns to second step grinding initial position around the second grinding surface and injection needle inner cylinder The line of line highest point and the second grinding surface and injection needle inner cylinder intersection highest point rotates a rotation angleThen it is ground Needle tubing obtains the second inclined-plane of needle point；
4th step, after grinding sword returns to third step grinding initial position, around grinding sword around the second grinding surface and injection needle The line of outer cylinder intersection highest point and the second grinding surface and injection needle inner cylinder intersection highest point reversely rotates twice of rotation AngleThen it is ground needle tubing, obtains needle point third inclined-plane；
Sword is ground in the second grinding surface and injection needle outer cylinder intersection highest point and the second grinding surface and injection needle The line of cylinder intersection highest point is overlapped with the intersection on the second inclined-plane and third inclined-plane, is the inclination sword of needle point.
The inclination alpha of first inclined-plane and the first grinding surface is 11~17 °；
Second grinding surface angle of inclination beta is 35 °~55 °；
Rotation angleIt is 45 °~60 °；
Offset l is 0.8mm~1.2mm.
This hair the utility model has the advantages that
By changing grinding surface inclination angle, rotation axis and rotation angle in grinding process, make manufactured injection needle needle point more Sharp, penetration Resistance when reducing injection is easier to ensure that piercing so that reaction force suffered by injection needle be made to reduce when making to be needled into The accuracy in direction, inserting needle faster, reduce the stimulation to pain nerve, mitigate the pain of patient.
Detailed description of the invention
Fig. 1 is needle point structure schematic diagram of the present invention.
Fig. 2 is needle point side structure schematic diagram of the present invention.
Fig. 3 is the first oblique surface machining of needle point schematic diagram of the present invention.
Fig. 4 is the second grinding surface of needle point machining sketch chart of the present invention.
Fig. 5 is the second oblique surface machining of needle point schematic diagram of the present invention.
Fig. 6 is needle point third oblique surface machining schematic diagram of the present invention.
In figure: the 1-the first inclined-plane；2-the second inclined-plane；3-third inclined-planes；4-inclination swords；5-grinding swords；6-grindings Sword is around the second grinding surface and injection needle outer cylinder intersection highest point；7-the second grinding surface and injection needle inner cylinder intersection are most High point；The inclination angle on the first inclined-plane α-；The inclination angle on β-the second inclined-plane and third inclined-plane；- rotation angle；L-offset；8-the One grinding surface；9-the second grinding surface；10-third grinding surfaces；11-the four grinding surface；12-the second inclined-plane 2 and third inclined-plane 3 Intersection.
Specific embodiment
As depicted in figs. 1 and 2, a kind of injection needle needle point, by the first inclined-plane 1, the second inclined-plane 2, third inclined-plane 3 and inclination sword 4 compositions, needle point inclination sword 4 are located at the tip of needle point, and the second inclined-plane 2 and third inclined-plane 3 are located at the front two sides of needle point, and first tiltedly Face 1 is located at the rear of needle point；
The inclination alpha on the first inclined-plane is 11~17 °；
Second grinding surface angle of inclination beta is 35 °~55 °.
The manufacturing method of the present invention:
Needle point is cut and is formed by grinding sharpening, and when manufacture, needle tubing is blocked with fixture:
The first step, grinding sword 5 obtain the first inclined-plane of needle point 1 as shown in Fig. 3 (a) along the first inclination angle of inclined plane α grinding needle tubing, First grinding surface 8 and the first inclined-plane 1 have same inclination angle, as shown in Fig. 3 (b)；
Cutting edge 5 is moved on to initial position by second step, moves an offset l along needle tubing outer cylinder, then along the second mill The angle of inclination beta of bevel 9 is ground needle tubing, as shown in Fig. 4 (a), obtains needle tubing section, the second grinding surface 9 has same with needle point inclination sword 4 The inclination angle of sample, needle point inclination sword 4 is overlapped with the intersection 12 on the second inclined-plane 2 and third inclined-plane 3, as shown in Fig. 4 (b)；
Third step after grinding sword returns to second step grinding initial position, is handed over around the second grinding surface 9 with injection needle inner cylinder Line highest point 6 and the second grinding surface 9 and the line of injection needle inner cylinder intersection highest point 7 rotate a rotation angleThen Grinding needle tubing obtains the second inclined-plane of needle point 2, as shown in Fig. 5 (b) as shown in Fig. 5 (a)；
4th step, after grinding sword returns to third step grinding initial position, around grinding sword around the second grinding surface 9 and injection needle The line of outer cylinder intersection highest point 6 and the second grinding surface 9 and injection needle inner cylinder intersection highest point 7 reversely rotates twice of rotation CornerThen it is ground needle tubing, as shown in Fig. 6 (a), needle point third inclined-plane 3 is obtained, as shown in Fig. 6 (b).
Sword is ground around the second grinding surface 9 and injection needle outer cylinder intersection highest point 6 and the second grinding surface 9 and injection needle The line of inner cylinder intersection highest point 7 is overlapped with the intersection 12 on the second inclined-plane 2 and third inclined-plane 3, is the inclination sword 4 of needle point.
The inclination alpha of first inclined-plane and the first grinding surface is 11~17 °；
Second grinding surface angle of inclination beta is 35 °~55 °；
Rotation angleIt is 45 °~60 °；
Offset l is 0.8mm~1.2mm.

Claims (2)

1.一种注射针针尖，其特征在于：由第一斜面(1)、第二斜面(2)、第三斜面(3)和倾斜刃(4)组成，针尖倾斜刃(4)位于针尖的尖部，第二斜面(2)和第三斜面(3)位于针尖的前方两侧，第一斜面(1)位于针尖的后方；1. A needle tip of an injection needle, characterized in that: it is composed of a first inclined surface (1), a second inclined surface (2), a third inclined surface (3) and an inclined edge (4), and the inclined edge (4) of the needle tip is located at the edge of the needle tip. the tip, the second bevel (2) and the third bevel (3) are located on both sides in front of the needle tip, and the first bevel (1) is located behind the needle tip; 第一斜面的倾角α为11～17°；The inclination angle α of the first inclined plane is 11-17°; 第二磨削面倾角β为35°～55°。The inclination angle β of the second grinding surface is 35° to 55°. 2.权利要求1所述一种注射针针尖的制造方法，其特征在于：2. the manufacture method of a kind of injection needle tip of claim 1, is characterized in that: 针尖由磨削刃磨削形成，制造时，将针管用卡具卡住：The needle tip is formed by grinding with a grinding blade. When manufacturing, the needle tube is clamped with a clamp: 第一步，磨削刃(5)沿第一斜面倾角α磨削针管，得到针尖第一斜面(1)，第一磨削面(8)与第一斜面(1)具有同样的倾角；In the first step, the grinding edge (5) grinds the needle tube along the first inclined plane inclination angle α to obtain the first inclined plane (1) of the needle tip, and the first grinding plane (8) and the first inclined plane (1) have the same inclination angle; 第二步，将切削刃(5)移到初始位置，沿针管外柱面移动一个偏移量l，然后沿第二磨削面(9)的倾角β磨削针管，得到针管截面，第二磨削面(9)与针尖倾斜刃(4)具有同样的倾角，针尖倾斜刃(4)与第二斜面(2)和第三斜面(3)的交线(12)重合；In the second step, move the cutting edge (5) to the initial position, move an offset l along the outer cylindrical surface of the needle tube, and then grind the needle tube along the inclination angle β of the second grinding surface (9) to obtain the needle tube section, the second The grinding surface (9) has the same inclination angle as the needle tip inclined edge (4), and the needle tip inclined edge (4) coincides with the intersection (12) of the second inclined surface (2) and the third inclined surface (3); 第三步，磨削刃返回第二步磨削起始位置后，绕第二磨削面(9)与注射针管内柱面交线最高点(6)和第二磨削面(9)与注射针管内柱面交线最高点(7)的连线旋转一个旋转角然后磨削针管，得到针尖第二斜面(2)；In the third step, after the grinding edge returns to the starting position of the grinding in the second step, go around the highest point (6) of the intersection line between the second grinding surface (9) and the inner cylindrical surface of the injection needle tube and the second grinding surface (9) and the The line connecting the highest point (7) of the intersection of the cylinders in the injection needle is rotated by a rotation angle Then grind the needle tube to obtain the second bevel (2) of the needle tip; 第四步，磨削刃返回第三步磨削起始位置后，绕磨削刃绕第二磨削面(9)与注射针管外柱面交线最高点(6)和第二磨削面(9)与注射针管内柱面交线最高点(7)的连线反向旋转两倍旋转角然后磨削针管，得到针尖第三斜面(3)；In the fourth step, after the grinding edge returns to the starting position of the third step of grinding, go around the grinding edge and go around the second grinding surface (9) and the highest point (6) of the intersection of the outer cylindrical surface of the injection needle tube and the second grinding surface. (9) The connection line with the highest point (7) of the intersection of the inner cylinder of the injection needle is reversely rotated by twice the rotation angle Then grind the needle tube to obtain the third bevel (3) of the needle tip; 磨削刃绕第二磨削面(9)与注射针管外柱面交线最高点(6)和第二磨削面(9)与注射针管内柱面交线最高点(7)的连线与第二斜面(2)和第三斜面(3)的交线(12)重合，是针尖的倾斜刃(4)；The line connecting the grinding edge around the second grinding surface (9) and the highest point (6) of the intersection of the outer cylinder of the injection needle tube and the highest point (7) of the intersection of the second grinding surface (9) and the inner cylinder of the injection needle tube Coinciding with the intersection line (12) of the second inclined plane (2) and the third inclined plane (3), it is the inclined edge (4) of the needle tip; 第一斜面和第一磨削面的倾角α均为11～17°；The inclination angles α of the first inclined surface and the first grinding surface are both 11° to 17°; 第二磨削面倾角β为35°～55°；The inclination angle β of the second grinding surface is 35°～55°; 旋转角为45°～60°；rotation angle 45°～60°; 偏移量l为0.8mm～1.2mm。The offset l is 0.8mm to 1.2mm.
CN201910158068.5A 2019-03-03 2019-03-03 Needle tip of injection needle and manufacturing method thereof Active CN109806464B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105288784A (en) * 2014-05-29 2016-02-03 广东龙心医疗器械有限公司 Disposable medical needle point
CN111135084A (en) * 2020-01-21 2020-05-12 震森(山东)医疗器械股份有限公司 A kind of safe dissolving needle and its processing method
CN115252116A (en) * 2022-08-14 2022-11-01 南京瑞波医学科技有限公司 Miniature ablation needle head

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CN111135084A (en) * 2020-01-21 2020-05-12 震森(山东)医疗器械股份有限公司 A kind of safe dissolving needle and its processing method
CN115252116A (en) * 2022-08-14 2022-11-01 南京瑞波医学科技有限公司 Miniature ablation needle head

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