A needle assembly for a blood lancet

Abstract

The utility model discloses a needle head subassembly for blood taking needle mainly relates to the field of medical blood taking instrument. Including the seat body, at least 3 needle body are fixed on the seat body, the needle body annular array, the one end of needle body away from the seat body is equipped with needle tip, the needle piece has the linear blade of inclination, the both sides symmetrical of linear blade are equipped with the inclined surface of inclination, linear blade is formed along all needle body annular radial arrangement, and the tip of linear blade is formed away from needle body annular center arrangement. The utility model has the beneficial effect that can improve the success rate of puncture operation greatly, guarantees the amount of bleeding and the rapid healing of wound.

Description

Technical Field

[0001] This utility model relates to the field of medical blood collection devices, specifically a needle tip assembly for blood collection needles. Background Technology

[0002] The press-triggered lancet is a stand-alone lancet characterized by its simplicity, ease of use, and high safety. It is primarily used for small-volume blood sampling from fingertips and other extremities, commonly employed in blood glucose testing and routine blood tests. This type of lancet enjoys high market acceptance due to its ability to reduce pain for the operator and improve sampling efficiency, making it widely used in medical facilities and for home testing.

[0003] Current blood collection needles typically consist of a single needle. To ensure sufficient blood volume for testing, the needle size has to be increased. Even so, cases of insufficient blood volume leading to collection failure are common in a single blood collection attempt. This can be caused by various factors, including needle design, operator technique, and individual patient differences. The single needle design results in a very low margin for error in blood collection procedures, making insufficient blood volume a frequent problem. Utility Model Content

[0004] The purpose of this invention is to provide a needle tip assembly for blood collection needles, which can greatly improve the success rate of puncture operations, ensure the amount of bleeding and rapid wound healing.

[0005] To achieve the above objectives, this utility model employs the following technical solution:

[0006] A needle tip assembly for blood collection includes a base body on which at least three needle bodies are fixed, arranged in a circular array. Each needle body has a needle tip at one end away from the base body. The needle tip has an inclined linear blade with inclined cut surfaces symmetrically arranged on both sides. The linear blade is arranged radially along the annulus formed by all the needle bodies, and the tip of the linear blade is located away from the center of the annulus formed by the needle bodies.

[0007] The needle body consists of four needles arranged in a circular array, with each pair of needles symmetrically arranged to form a cross-shaped layout with the tip facing outwards.

[0008] The base includes two end faces perpendicular to the needle body, and the bottom of the needle body passes through the two end faces and is fixedly installed on the base.

[0009] The needle body has an inwardly recessed positioning groove on its periphery. The positioning groove is located below the lowest end of the linear blade. The base body has a needle position hole that passes through both end faces of the needle body. The cross-section of the needle position hole is a circle corresponding to the diameter of the needle body. The inner wall of the needle position hole has a protruding positioning block. When the positioning block and the positioning groove are engaged, the linear blade is arranged radially along the annulus formed by all the needle bodies, and the tip of the linear blade is located away from the center of the annulus formed by the needle bodies.

[0010] The linear blade has an inclination angle of 45 degrees.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This needle assembly, based on the combination and cooperation of multiple needles, can quickly pierce the skin when inserted, allowing blood to flow out smoothly. When withdrawing the needle, the oblique edge and cut surface are conducive to the merging of tissue at the incision site. This not only facilitates rapid wound closure, but also results in a relatively regular wound shape and relatively orderly tissue repair, which is conducive to recovery and healing. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the present invention.

[0014] Figure 2 This is a split diagram of the present invention.

[0015] Figure 3 This is a schematic diagram of the needle body of this utility model.

[0016] Figure 4 This is a bottom view of the entire utility model.

[0017] Figure 5 This is a utility model Figure 4 Sectional view of plane AA.

[0018] Figure 6 This is a utility model Figure 4 The left-side view.

[0019] The labels shown in the attached diagram:

[0020] 1. Base; 2. End face; 3. Needle hole; 4. Positioning block; 5. Needle body; 6. Linear blade; 7. Cut surface; 8. Positioning groove. Detailed Implementation

[0021] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0022] Example 1: A 4-needle needle assembly

[0023] It includes a base 1 and a needle 5.

[0024] The needle body 5 consists of four identical needle bodies 5, with identical length and dimensions (diameter), used to achieve the basic function of puncture.

[0025] One end of the needle body 5 is provided with a needle tip, the needle tip has an inclined linear blade 6, the linear blade 6 is centrally located at the diameter of the needle body 5, the inclination angle of the linear blade 6 is 45 degrees, and two symmetrical cutting surfaces 7 are provided on both sides of the linear blade 6, which are inclined relative to the needle body 5. The linear blade 6 is formed by cutting one end of the needle body 5 symmetrically through the two cutting surfaces 7.

[0026] This needle tip uses a double-beveled tip, which can form a V-shaped incision during puncture. This allows the needle tip to better distribute pressure during puncture, quickly separate tissue, reduce damage to the skin and tissue, reduce pain, and guide the tissue to heal in the center upon withdrawal.

[0027] The needle body 5 is provided with an inwardly recessed positioning groove 8 on its periphery. The positioning groove 8 is located at the edge of the needle body 5 away from the needle tip. That is, the positioning groove 8 is vertically corresponding to the lowest end of the linear blade 6. The lowest end of the linear blade 6 is centered relative to the positioning groove 8. Therefore, the positioning groove 8 is used to position the angle of the needle body 5.

[0028] The four needles are arranged in a ring array, forming a cross-shaped distribution structure.

[0029] The linear blades 6 of the four needle bodies 5 are arranged on the radial line of the circular array of needle bodies 5, with the highest point of the linear blades 6 positioned on the outside. This results in the four needle bodies 5 forming a cross-shaped layout with the highest point of the needle tip at the outermost end and the lowest point at the innermost end. When piercing the skin, the two opposing needle tips pierce the epidermis from the outside in, forming a cross-shaped incision that is not connected in the middle. This makes it easier to penetrate the skin, increases bleeding, and guides the tissue to merge in the center upon withdrawal. The regularly corresponding incisions are conducive to rapid healing.

[0030] The base 1 is integrally formed from plastic material. The base 1 is a cylindrical component. The base 1 has two opposite end faces 2. In specific applications, the end faces 2 are perpendicular to the ejection direction to provide a carrier for the installation of the needle body 5 and to realize the positioning and assembly of the needle body 5.

[0031] The two end faces 2 of the base 1 have needle holes 3 perpendicular to the end faces 2. The cross-section of the needle holes 3 is circular, corresponding to the diameter of the needle body 5. There are four needle holes 3 arranged in a ring array, centered on the end faces 2, to achieve a symmetrical arrangement. The inner wall of the needle holes 3 is provided with a protruding positioning block 4. The positioning block 4 is located on the inner side of the positioning holes relative to their ring distribution. When the positioning block 4 is engaged with the positioning groove 8, the linear blade 6 is radially arranged relative to the ring formed by all the needle bodies 5, and is inclined from the inside out in a direction away from the end face 2.

[0032] Each needle body 5 passes through the needle position hole 3, and the positioning groove 8 is engaged and fixed with the positioning block 4. This not only completes the installation of the needle body 5 and ensures reliable fixation, but also ensures the positioning of the linear blade 6 in the direction during installation, enabling rapid and high-precision assembly.

[0033] The specially designed needle tip and body combination (5 elements) enables simultaneous puncture by four needles. The cross-shaped linear blades (6 elements) and needle tip structure maximize bleeding volume and promote rapid wound healing. This significantly improves the success rate of puncture procedures, even with variations in operator skill and individual patient differences, making it suitable for scenarios requiring rapid and efficient blood collection.

[0034] Example 2: A 3-needle needle assembly

[0035] This example differs from Embodiment 1 in that three needles 5 are used, which are also centrally and circularly distributed relative to the end face 2 of the seat body 1. The linear blade 6 is arranged radially along the ring formed by all the needles 5, with the highest point located at the outermost end of the ring and the lowest point located at the innermost end of the ring.

[0036] The three linear blades, with an outer high and inner low shape, can quickly pierce the skin when they penetrate it, allowing blood to flow out smoothly and creating three triangular incisions on the skin. During the wound healing process, the relatively regular shape of the wound allows for more orderly tissue repair, which is beneficial for recovery.

[0037] Example 3: A 5-needle needle assembly

[0038] This example differs from Embodiment 1 in that five needles 5 are used, which are also centrally and circularly distributed relative to the end face 2 of the seat body 1. The linear blade 6 is arranged radially along the ring formed by all the needles 5, with the highest point located at the outermost end of the ring and the lowest point located at the innermost end of the ring.

[0039] The structure of the 5-group needle is more dense, which increases pain during puncture, but it is also sharper. It squeezes and cuts the skin tissue from the outside in, resulting in a concentrated wound in the local area, which is conducive to increasing the amount and duration of bleeding. It is suitable for emergency situations where a certain amount of blood needs to be collected.

Claims

1. A needle tip assembly for blood collection needles, characterized in that, The device includes a base on which at least three needles are fixed. The needles are arranged in a circular array. Each needle has a needle tip at one end away from the base. The needle tip has an inclined linear blade with inclined cut surfaces symmetrically arranged on both sides. The linear blade is arranged radially along the ring formed by all the needles, and the tip of the linear blade is located away from the center of the ring formed by the needles.

2. The needle assembly for blood collection needles according to claim 1, characterized in that, The needle body consists of four needles arranged in a circular array, with each pair of needles symmetrically arranged to form a cross-shaped layout with the tip facing outwards.

3. The needle assembly for blood collection needles according to claim 1, characterized in that, The base includes two end faces perpendicular to the needle body, and the bottom of the needle body passes through the two end faces and is fixedly installed on the base.

4. The needle assembly for blood collection needles according to claim 1, characterized in that, The needle body has an inwardly recessed positioning groove on its periphery. The positioning groove is located below the lowest end of the linear blade. The base body has a needle position hole that passes through both end faces of the needle body. The cross-section of the needle position hole is a circle corresponding to the diameter of the needle body. The inner wall of the needle position hole has a protruding positioning block. When the positioning block and the positioning groove are engaged, the linear blade is arranged radially along the annulus formed by all the needle bodies, and the tip of the linear blade is located away from the center of the annulus formed by the needle bodies.

5. The needle assembly for blood collection needles according to claim 1, characterized in that, The linear blade has an inclination angle of 45 degrees.

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