CN109806464A - A kind of injection needle needle point and its manufacturing method - Google Patents
A kind of injection needle needle point and its manufacturing method Download PDFInfo
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- 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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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
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. a kind of injection needle needle point, it is characterised in that: by the first inclined-plane (1), the second inclined-plane (2), third inclined-plane (3) and inclination sword
(4) it forms, needle point inclination sword (4) is located at the tip of needle point, and the second inclined-plane (2) and third inclined-plane (3) are located at the front two of needle point
Side, the first inclined-plane (1) are 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 °.
2. a kind of manufacturing method of injection needle needle point described in claim 1, it is characterised in that:
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) are ground needle tubing along the first inclination angle of inclined plane α, obtain the first inclined-plane of needle point (1), the first grinding surface (8)
There is same inclination angle with the first inclined-plane (1)；
Second step, moves on to initial position for cutting edge (5), moves an offset l along needle tubing outer cylinder, then along the second grinding
The angle of inclination beta in face (9) is ground needle tubing, obtains needle tubing section, and the second grinding surface (9) and needle point inclination sword (4) have same inclination angle,
Needle point inclination sword (4) is overlapped with the intersection (12) of the second inclined-plane (2) and third inclined-plane (3)；
Third step, after grinding sword returns to second step grinding initial position, around the second grinding surface (9) and injection needle inner cylinder intersection
The line of highest point (6) and the second grinding surface (9) and injection needle inner cylinder intersection highest point (7) rotates a rotation angle
Then it is ground needle tubing, obtains the second inclined-plane of needle point (2)；
4th step, after grinding sword returns to third step grinding initial position, around grinding sword outside the second grinding surface (9) and injection needle
The line of cylinder intersection highest point (6) and the second grinding surface (9) and injection needle inner cylinder intersection highest point (7) reversely rotates two
Times rotation angleThen it is ground needle tubing, obtains needle point third inclined-plane (3)；
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 pipe inner cylinder intersection highest point (7) is overlapped with the intersection (12) of the second inclined-plane (2) and third inclined-plane (3), is needle point
It tilts sword (4)；
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910158068.5A CN109806464B (en) | 2019-03-03 | 2019-03-03 | Needle tip of injection needle and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910158068.5A CN109806464B (en) | 2019-03-03 | 2019-03-03 | Needle tip of injection needle and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109806464A true CN109806464A (en) | 2019-05-28 |
| CN109806464B CN109806464B (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910158068.5A Active CN109806464B (en) | 2019-03-03 | 2019-03-03 | Needle tip of injection needle and manufacturing method thereof |
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Cited By (1)
| 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 |
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| CN105288784A (en) * | 2014-05-29 | 2016-02-03 | 广东龙心医疗器械有限公司 | Disposable medical needle point |
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| Publication number | Publication date |
|---|---|
| CN109806464B (en) | 2021-06-04 |
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