Disposable medical triangular pyramid type needle
By changing the tip of the medical needle to a triangular pyramid shape and treating its surface, the problem of cuts during puncture and removal is solved, achieving the effects of reducing pain and improving flow.
Patent Information
- Application Number
- CN202511308131.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-15
- Publication Date
- 2025-11-14
AI Technical Summary
Existing medical needles can easily cause subcutaneous cuts to flesh and blood vessels during puncture and withdrawal, and the use of lubricants may cause infection and negatively impact healing and recovery.
The medical needle tip has been redesigned into a pyramidal shape, using a 60° inclined plane and a 15° conical inclined plane to form a triangular pyramidal needle tip. A transition arc surface, an external polishing layer, and a knurled layer are added to the needle tip surface to replace the straight pyramidal protrusions, reducing resistance and improving smoothness.
It effectively reduces the pain of cuts during puncture and removal, avoids secondary damage to subcutaneous tissue and blood vessels, eliminates the need for lubricant, and improves the connection effect of the needle and the flow of medication.
Smart Images
Figure CN120939359A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a medical needle, and more particularly to a disposable medical triangular pyramidal needle. Background Technology
[0002] In existing technologies, such as Figure 1 and Figure 2 As shown, the medical needle is made by processing the front end of the metal needle 1 into a beveled plane 2, so that the front end forms a sharp needle tip. Two sharp arc-shaped cutting edges 3 are also formed on both sides of the beveled plane 2. When the medical needle is inserted into the subcutaneous tissue of the patient, it can quickly penetrate into the subcutaneous flesh. However, when the medical needle is withdrawn from the subcutaneous flesh of the patient, the needle tip cannot return along the original path without deviation. It will deviate to some extent and cause cuts to the subcutaneous flesh. Especially when puncturing or withdrawing subcutaneous veins, after the medical needle is inserted into the subcutaneous tissue, it is necessary to lift the skin and flesh, puncture the tissue, and then insert it into the vein. During the process of lifting the skin and flesh, the medical needle will cause cuts to the subcutaneous flesh and blood vessels.
[0003] In existing technologies, in order to reduce the resistance of medical needles when they penetrate the patient's subcutaneous flesh and blood vessels and alleviate the patient's pain, a lubricant is coated on the surface of the metal needle tip 1 of the medical needle. When the medical needle penetrates the patient's blood vessels, it carries the lubricant, which can cause some infection to the patient's blood and also have a certain negative impact on the patient's healing and recovery. Summary of the Invention
[0004] In view of this, the main objective of the present invention is to provide a disposable medical triangular pyramidal needle. Through this technical solution, the tip of the existing medical needle is changed to a pyramidal shape, which not only maintains the sharpness of the existing medical needle tip, but also eliminates the sharpness of the original sharp edges on both sides, avoiding or reducing the cutting of subcutaneous blood vessels when the medical needle is punctured and pulled out, and effectively reducing the secondary cutting pain when the human vein is pulled out.
[0005] To achieve the above objectives, the technical solution of the present invention is as follows: A disposable medical triangular pyramidal needle includes a metal needle tube. A 60° inclined plane is provided at the front end of the metal needle tube, and two conical inclined planes inclined at 15° to the sides are provided on the two inclined planes in front of the needle hole at the tip of the metal needle tube. The triangular pyramidal shape of the needle tip is formed by two arc-shaped pyramids formed by the back side of the inclined plane formed by the tip of the metal needle tube intersecting with the outer side of the two conical inclined planes and a straight pyramid formed by the upward intersection of the two conical inclined planes.
[0006] As a further technical solution, a transition arc surface is also included, which is formed by removing the protrusion from the rear part of the straight pyramid at the tip of the metal needle tube to create a transition arc surface.
[0007] As a further technical solution, an external surface polishing layer is also included. The external surface polishing layer is disposed on the outer surface of the front part of the metal needle tip. The surface roughness of the external surface polishing layer reaches Ra0.4, which meets the international standard for puncture stroke resistance of medical needles and injection needles ≤0.70-0.85.
[0008] As a further technical solution, a knurled layer is also included, which is disposed on the arcuate surface of the rear part of the metal needle tip.
[0009] As a further technical solution, an internal surface polishing layer is also included, which is disposed on the inner sidewall of the needle hole of the metal needle tip.
[0010] The beneficial effects of adopting the above technical solution are as follows: A disposable medical triangular pyramid needle, through this technical solution, changes the tip of the existing intravenous needle to a triangular pyramid shape, maintaining the sharpness of the existing intravenous needle tip. The 15° conical bevel formed on the medical needle head creates a negative force when the two curved pyramids are inserted and withdrawn, effectively reducing the resistance when the medical needle is inserted into or withdrawn from the patient's subcutaneous tissue. The transitional curved surface replaces the protruding pyramid at the rear of the removed straight pyramid, effectively preventing the medical needle from cutting the patient's subcutaneous tissue and blood vessels when the two curved pyramids and the rear section of the straight pyramid are withdrawn. This design effectively prevents secondary cuts and pain to the patient's subcutaneous tissue and blood vessels when the medical needle is withdrawn. The knurled layer on the rear of the metal needle tip enhances the connection between the metal needle tip and the injection-molded needle holder. The polished outer surface of the metal needle tip ensures that the surface meets the national standard for acupuncture resistance of ≤0.70-0.85, effectively eliminating the need for lubricant on the surface of the infusion needle. The polished inner surface of the metal needle tip significantly improves the flow of medication through the needle hole. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of a vein needle in the prior art.
[0012] Figure 2 for Figure 1 A side view structural diagram.
[0013] Figure 3 This is a schematic diagram of the structure of the present invention.
[0014] Figure 4 for Figure 3 A side view structural diagram.
[0015] Figure 5 for Figure 3 A magnified view of a portion of the image from direction A.
[0016] Figure 6 for Figure 4 A magnified view of the K-1 region before the transition arc surface treatment of the rear part of the straight pyramid.
[0017] Figure 7 for Figure 4 A magnified view of the K-2 region after the transition arc surface of the rear part of the straight pyramid has been treated.
[0018] In the figure, 1 is a metal needle tip, 2 is a beveled plane, 3 is a sharp arc-shaped cutting edge, 4 is a conical bevel, 5 is an arc-shaped pyramid, 6 is a straight pyramid, 7 is a pinhole, 8 is a transition arc surface, 9 is an outer surface polishing layer, 10 is a knurled layer, and 11 is an inner surface polishing layer. Detailed Implementation
[0019] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings.
[0020] like Figure 3 -- Figure 7 As shown, the disposable medical triangular pyramid needle of the present invention includes a metal needle tube 1. An inclined plane 2 at 60° to the axis of the metal needle tube 1 is provided at the front part of the metal needle tube 1. Conical inclined planes 4 inclined at 15° to both sides are provided on the inclined planes 2 in front of the needle hole 7 at the tip of the metal needle tube 1. The triangular pyramid shape of the needle tip is formed by two arc-shaped pyramids 5 formed by the back of the inclined plane 2 formed by the tip of the metal needle tube 1 intersecting with the outer sides of the two conical inclined planes 4, and a straight pyramid 6 at 60° to the axis of the metal needle tube 1 formed by the upward intersection of the two conical inclined planes 4.
[0021] As a further embodiment, it also includes a transition arc surface 8, which is formed by removing the protrusion from the rear part of the straight pyramid 6 at the tip of the metal needle tube 1 to form a transition arc surface.
[0022] As a further embodiment, it also includes an external surface polishing layer 9, which is disposed on the outer surface of the front part of the metal needle tip 1. The surface roughness of the external surface polishing layer 9 reaches Ra0.5, which meets the international standard for puncture stroke resistance of medical infusion needles and injection needles ≤0.70-0.85.
[0023] As a further embodiment, it also includes a knurled layer 10, which is disposed on the rear arcuate surface of the metal needle tip 1.
[0024] As a further embodiment, it also includes an internal surface polishing layer 11, which is disposed on the inner sidewall of the needle hole 7 of the metal needle tip 1.
[0025] In application, this invention utilizes a triangular design scheme combining arc-shaped pyramids and straight pyramidal edges to effectively reduce resistance when penetrating the patient's subcutaneous flesh and blood vessels. The two sharp, arc-shaped cutting edges 3 are deflected downwards and to the sides by 15° via the conical inclined surface 4, creating a negative angle when the medical needle is inserted and withdrawn. This effectively reduces resistance during needle insertion and withdrawal. A transitional arc surface 8 replaces the removed rear protrusion of the straight pyramid 6, effectively preventing cuts to the patient's subcutaneous flesh and blood vessels when the needle is withdrawn from the rear sections of the two arc-shaped pyramids 5 and the straight pyramid 6. The filtering arc surface 8 effectively eliminates any risk of injury to the patient's subcutaneous flesh and blood vessels during needle withdrawal. To reduce the pain from secondary cuts in the tube, the knurled layer 10 on the rear of the metal needle tip 1 enhances the connection between the metal needle tip 1 and the injection-molded needle holder. The polished outer surface layer 9 of the metal needle tip 1 ensures that its surface directly meets international standards for puncture resistance of medical needles and injection needles, effectively eliminating the need for lubricant on the surface of medical needles. The internal surface polished layer 11 on the inner sidewall of the needle hole 7 of the metal needle tip 1 effectively improves the surface smoothness of the inner sidewall of the needle hole 7, reducing crystal formation on the inner sidewall of the needle hole 7 when the medical needle is drawing fluid, thus ensuring smooth flow of the medication in the needle hole 7 of the metal needle tip 1.
[0026] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.
Claims
1. A disposable medical triangular pyramidal needle, comprising a metal needle tube, wherein an inclined plane at a 60° angle to the axis of the metal needle tube is provided at the front part of the metal needle tube, characterized in that, On the two inclined planes in front of the needle hole at the tip of the metal needle tube, there are conical inclined planes that are inclined to both sides at 15°. The back of the inclined plane formed by the tip of the metal needle tube is intersected with the outer side of the two conical inclined planes to form two arc-shaped pyramids, and the two conical inclined planes intersecting upward to form a straight pyramid at 60° with the axis of the metal needle tube, which constitutes the triangular pyramid shape of the needle tip.
2. The disposable medical triangular pyramid needle according to claim 1, characterized in that, It also includes a transition arc surface, which is formed by removing the protrusion from the rear part of the straight pyramid at the tip of the metal needle tube to create a transition arc surface.
3. The disposable medical triangular pyramidal needle according to claim 1 or 2, characterized in that, It also includes an external surface polishing layer, which is disposed on the outer surface of the front part of the metal needle tip. The surface roughness of the external surface polishing layer reaches Ra0.4, which meets the international standard of ≤0.70-0.85 for the puncture stroke resistance of medical infusion needles and injection needles.
4. The disposable medical triangular pyramidal needle according to claim 3, characterized in that, It also includes a knurled layer, which is disposed on the arcuate surface of the rear part of the metal needle tip.
5. The disposable medical triangular pyramidal needle according to claim 1 or 2, characterized in that, It also includes an internal surface polishing layer, which is disposed on the inner sidewall of the needle hole of the metal needle tip.