A needle assembly

Abstract

The utility model discloses a needle head assembly, needle body includes base plate, side plate, base plate has two side edges in width direction, side plate has first side with side edge is connected and second side away from first side, be equipped with first cutout portion on base plate, be equipped with second cutout portion that extends from first side to second side on side plate, and be equipped with several groups third cutout portion that extend from second side to first side on side plate, second cutout portion and third cutout portion have staggered portion in the width direction of side plate between, plastic needle seat injection moulding is on needle body, and the board and side plate are wrapped, first cutout portion, second cutout portion and third cutout portion all are located in plastic needle seat. In the utility model, the material surface of base plate and side plate does not have the path of straight through in length direction, and plastic needle seat and needle body cooperate and reduce the possibility of air leakage maximum limit, and external bacteria is difficult to enter the inside of plastic needle seat, and it is safe and reliable to use health.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a needle. Background Technology

[0002] Patent application CN202322282160.7 discloses a medical needle, comprising a metal needle body and a plastic needle hub. The plastic needle hub is wrapped around the metal needle body. The metal needle body includes a base plate, a first side plate, and a second side plate. A straight path exists along the length of the material surface of the base plate (i.e., the side surface between the two ends in the length direction, which contacts the plastic needle hub). Similarly, a straight path also exists along the length of the material surface of the second side plate (i.e., the side surface between the two ends in the length direction, which contacts the plastic needle hub). These straight paths are continuous in a straight direction. When the plastic needle hub is injection molded onto the metal needle body, these straight paths and the plastic needle hub can easily form air leakage channels. External bacteria may enter the product through these leakage channels, making it susceptible to bacterial infection during product use. Utility Model Content

[0003] To address the aforementioned technical problems, the purpose of this utility model is to propose a needle assembly in which there are no straight paths along the length of the material surfaces of the substrate and side plates. The plastic needle holder and needle body work together to form better airtightness, reducing the possibility of air leakage. External bacteria have difficulty entering the interior of the plastic needle holder through the substrate and side plates, making it hygienic, safe, reliable, and highly practical.

[0004] The technical solution of this utility model is achieved as follows: a needle assembly, including a needle body and a plastic needle seat;

[0005] The needle body includes a base plate and a side plate; the base plate has a needle tip end and a needle tail end in the length direction, and two sides in the width direction; the side plate extends continuously along the length direction of each side plate, and has a first side connected to the side plate and a second side away from the first side plate.

[0006] The substrate is provided with at least one set of first cut-out portions; the first cut-out portions have open ends extending to both sides;

[0007] The side panel is provided with a second cutout portion extending from the first side to the second side; and the side panel is provided with a plurality of third cutout portions extending from the second side to the first side; the second cutout portions and the third cutout portions have an interlacing portion in the width direction of the side panel;

[0008] The plastic needle holder is injection molded onto the needle body and wraps around the substrate and side plate; and the first cutout portion, the second cutout portion and the third cutout portion are all located inside the plastic needle holder, and the interior of the first cutout portion, the second cutout portion and the third cutout portion is filled with a portion of the plastic needle holder.

[0009] Furthermore, a second cut-out portion is provided for each of the first cut-out portions; the open end of the first cut-out portion is connected to the end of the second cut-out portion located on the first side at the corresponding position.

[0010] Furthermore, a gap is formed between the second cutout portion and the second side, and between the third cutout portion and the first side.

[0011] Furthermore, an outer extension portion extends from the needle tail end of the substrate in a direction away from the needle tip end; a fourth cutout portion extends from both sides of the outer extension portion in the width direction toward the opposite inward side; and a fifth cutout portion extends from the free end of the outer extension portion toward the needle tail end.

[0012] Wherein, the fourth cutout portion and the fifth cutout portion have an intersecting portion in the width direction of the outer extension portion;

[0013] The outer extension, the fourth cutout portion, and the fifth cutout portion are all located inside the plastic needle holder, and the interior of the fourth cutout portion and the fifth cutout portion is filled with a portion of the plastic needle holder;

[0014] Furthermore, a gap is formed between the fourth cutout portions on both sides in the width direction of the outer extension.

[0015] Furthermore, the substrate has puncture sections and assembly sections arranged at intervals along its length; the width of the puncture section is smaller than that of the assembly section; the needle tip is formed on the puncture section, and the needle tail is formed on the assembly section; the first cutout portion is located on the assembly section, and the second cutout portion and the third cutout portion are both arranged corresponding to the assembly section.

[0016] Furthermore, the needle body is made of a metallic material.

[0017] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0018] 1. This utility model, through the combined use of the needle body and the plastic needle holder, achieves a barrier in the first cutout portion, preventing a straight path along the length of the substrate material surface. Similarly, the second and third cutout portions also prevent a straight path along the length of the side plate material surface. The plastic needle holder is injection molded and wrapped around the needle body, filling the first, second, and third cutout portions. This creates excellent airtightness between the plastic needle holder and the substrate material surfaces, and between the plastic needle holder and the side plate material surfaces, reducing the possibility of air leakage. External bacteria have difficulty entering the interior of the plastic needle holder through the substrate and side plates, making it hygienic, safe, reliable, and highly practical.

[0019] 2. This utility model utilizes the outer extension portion, which has a third and a fourth cutout portion machined on it. Due to the obstruction of the fourth and fifth cutout portions, there is no straight path along the length of the material surface of the outer extension portion. The plastic needle seat wraps around the outer extension portion and fills the third and fourth cutout portions, resulting in better airtightness at the tail of the overall structure, further reducing the possibility of air leakage and enhancing its practicality.

[0020] 3. In this utility model, through the combined use of [the following], when the plastic needle seat is injection molded to wrap the needle body and fills the first cut-out portion, the second cut-out portion, the third cut-out portion, the fourth cut-out portion, and the fifth cut-out portion, the bonding strength between the needle body and the plastic needle seat can be enhanced, effectively preventing the needle body from detaching from the plastic needle seat. Attached Figure Description

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0022] Figure 1 This is a three-dimensional structural diagram of the needle body of this utility model;

[0023] Figure 2 for Figure 1 A side view structural diagram;

[0024] Figure 3 for Figure 1 A top view structural diagram;

[0025] Figure 4 This is an assembly diagram of the needle body and plastic needle holder of this utility model;

[0026] Figure 5 for Figure 4 Internal structure diagram;

[0027] The components are: 1. Needle body; 2. Base plate; 21. First cut-out portion; 22. Needle tip; 23. Cutting edge; 3. Side plate; 31. Second cut-out portion; 32. Third cut-out portion; 4. Outer extension portion; 41. Fifth cut-out portion; 42. Fourth cut-out portion; 5. Plastic needle seat. Detailed Implementation

[0028] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0029] like Figure 1-5 The diagram shows a needle assembly according to this embodiment, including a needle body 1 and a plastic needle holder 5. The needle body 1 is formed from a metal material. The needle body 1 includes a base plate 2 and side plates 3. The base plate 2 has a designed length and two ends in the length direction. The first end of the base plate 2 forms a needle tip 22, and the second end forms a needle tail section. The base plate 2 has two sides in the width direction. The aforementioned side plates 3 are arranged on both sides of the base plate 2 in the width direction and are perpendicular to the base plate 2. The side plates 3 extend continuously along the length direction of each side and have a first side connected to the side and a second side away from the first side. The distance between the first side and the second side of the side plate 3 is the width of the side plate 3.

[0030] The substrate 2 described above has a first cutout portion 21 processed on it. This first cutout portion 21 is a through-hole structure that partially cuts out a portion of the substrate 2, penetrating the substrate 2 along its thickness direction. Several first cutout portions 21 are arranged at intervals along the length direction of the substrate 2. Each first cutout portion 21 has an open end extending to both sides. Through this structural design, the first cutout portions 21 obstruct the formation of a straight path on the material surface of the substrate 2 in the length direction. In this embodiment, the straight path is a continuous path in the straight direction. The material surface of the substrate 2 includes both sides in the thickness direction and both sides in the width direction. For example, the first cutout portions 21 obstruct the formation of discontinuous paths on both sides in the thickness direction of the substrate 2.

[0031] The aforementioned side plate 3 has a second cutout portion 31 extending from the first side to the second side. This second cutout portion 31 has an open end on the first side and a closed end at the end away from the open end. The side plate 3 also has several sets of third cutout portions 32 extending from the second side to the first side. Each third cutout portion 32 has an open end on the second side and a closed end at the end away from the open end. The second cutout portions 31 and the third cutout portions 32 are arranged at intervals along the length of the side plate 3. The second cutout portions 31 and the third cutout portions 32 are through-hole structures that partially cut out sections of the substrate 2, and both are arranged through-holes along the thickness direction of the side plate 3. A gap is formed between the second cutout portion 31 and the second side, and between the third cutout portion 32 and the first side.

[0032] By rationally designing the dimensions of the second cutout portion 31 and the third cutout portion 32 in the width direction of the side plate 3, an interlacing portion is formed between the second cutout portion 31 and the third cutout portion 32 in the width direction of the side plate 3. Through this structural design, the second cutout portion 31 and the third cutout portion 32 prevent the formation of a straight path in the length direction on the material surface of the side plate 3. The material surface of the side plate 3 includes the two side surfaces in the thickness direction and the two side surfaces in the width direction. For example, on the two side surfaces in the thickness direction of the side plate 3, the second cutout portion 31 and the third cutout portion 32 create a curved and meandering path. Similarly, on the two side surfaces in the width direction of the side plate 3, the second cutout portion 31 and the third cutout portion 32 create a discontinuous path in the length direction.

[0033] The aforementioned plastic needle holder 5 is injection molded onto the needle body 1 and encloses the substrate 2 and side plate 3. The needle tip 22 on the substrate 2 protrudes from the plastic needle holder 5. The aforementioned first cutout portion 21, second cutout portion 31, and third cutout portion 32 are all located within the plastic needle holder 5, and a portion of the plastic needle holder 5 is filled inside the first cutout portion 21, second cutout portion 31, and third cutout portion 32.

[0034] In the above structure, a second cut-out portion 31 is arranged corresponding to each first cut-out portion 21. The open end of the first cut-out portion 21 is connected to the open end of the corresponding second cut-out portion 31 located on the first side, so that the first cut-out portion 21 and the second cut-out portion 31 form an integral structure.

[0035] In this embodiment, an outer extension 4 extends from the needle tail end of the substrate 2 in a direction away from the needle tip end 22. Fourth cut-out portions 42 extend inward from both sides of the outer extension 4 in the width direction. One end of each fourth cut-out portion 42 is open, and the other end is closed. A gap is formed between the two fourth cut-out portions 42 in the width direction of the outer extension 4. A fifth cut-out portion 41 extends from the free end (the end away from the needle tail end) of the outer extension 4 towards the needle tail end. One end of the fifth cut-out portion 41 is open, and the other end is closed. The fourth cut-out portions 42 and 41 are through-hole structures that partially cut out the outer extension 4, and both fourth cut-out portions 42 and 41 are arranged through-holes along the thickness direction of the outer extension 4.

[0036] The width of the fifth cutout portion 41 is greater than the spacing between the fourth cutout portions 42 on both sides in the width direction of the outer extension 4, thus creating an interlacing portion between the fourth cutout portions 42 and the fifth cutout portion 41 in the width direction of the outer extension 4. Through this structural design, the fourth cutout portions 42 and the fifth cutout portions 41 obstruct the flow, preventing a straight path from forming on the material surface of the outer extension 4 in the length direction. The material surface of the outer extension 4 includes the side surfaces on both sides in the thickness direction and the side surfaces on both sides in the width direction. For example, the side surfaces on both sides in the thickness direction of the outer extension 4, obstructed by the fourth cutout portions 42 and the fifth cutout portions 41, form a winding and circuitous path. For example, the side surfaces on both sides in the width direction of the outer extension 4, obstructed by the fourth cutout portions 42 and the fifth cutout portions 41, form a discontinuous path in the length direction.

[0037] When the plastic needle hub 5 is injection molded and wrapped around the needle body 1, the outer extension 4, the fourth cutout portion 42, and the fifth cutout portion 41 are all located inside the plastic needle hub 5, and the interior of the fourth cutout portion 42 and the fifth cutout portion 41 is filled with a portion of the plastic needle hub 5.

[0038] In this embodiment, the needle tip 22 of the aforementioned substrate 2 is a triangular spike structure. The spike structure is sharpened on both sides to ensure its piercing force. The aforementioned side plate 3 extends to a position close to the needle tip 22, and the end of the side plate 3 facing the needle tip 22 is machined into an inclined structure. The second side of the side plate 3 is sharpened from the inclined structure to form a cutting edge 23. This cutting edge 23 extends along the designed length of the second side of the side plate 3.

[0039] In this embodiment, the substrate 2 has puncture sections and assembly sections arranged at intervals along its length. The width of the puncture section is smaller than that of the assembly section. The puncture end and the assembly section are connected by a transition section. The aforementioned needle tip 22 is formed on the puncture section, and the needle tail end is formed on the assembly section. The first cutout portion 21 is located on the assembly section, and the second cutout portion 31 and the third cutout portion 32 are both arranged corresponding to the assembly section. The aforementioned plastic needle seat 5 is wrapped around the assembly section and extends to the position of the outer extension portion 4 to wrap around the outer extension portion 4.

[0040] In actual assembly, the needle body 1 is integrally molded. The plastic needle base 5 is injection molded onto the needle body 1 to enclose the substrate 2, side plate 3, and outer extension. During injection molding, the plastic needle base 5 fills into the interior of the first cutout portion 21, the second cutout portion 31, the third cutout portion 32, the fourth cutout portion 42, and the fifth cutout portion 41. Due to the obstruction of the first cutout portion 21, a straight path cannot be formed on the material surface of the substrate 2 in the longitudinal direction. Similarly, due to the obstruction of the second and third cutout portions 31 and 32, a straight path cannot be formed on the material surface of the side plate 3 in the longitudinal direction. Due to the obstruction of the fourth and fifth cutout portions 42 and 41, a straight path cannot be formed on the material surface of the outer extension portion 4 in the longitudinal direction. The combination of the above methods, after injection molding, creates a better airtightness between the plastic needle holder 5 and the substrate 2, and between the plastic needle holder 5 and the side plate 3, reducing the possibility of air leakage. External bacteria have difficulty entering the interior of the plastic needle holder 5 through the substrate 2 and the side plate 3, ensuring hygienic and reliable use. Furthermore, the fit between the plastic needle holder 5 and the outer extension 4 at the tail end of the overall structure creates a better airtightness, further reducing the possibility of air leakage. External bacteria have difficulty entering the interior of the plastic needle holder 5 through the outer extension 4.

[0041] When the plastic needle holder 5 is injection molded to wrap the needle body 1, and fills the first cut-out portion 21, the second cut-out portion 31, the third cut-out portion 32, the fourth cut-out portion 42, and the fifth cut-out portion 41, it can enhance the bonding strength between the needle body 1 and the plastic needle holder 5, and effectively prevent the needle body 1 from detaching from the plastic needle holder 5.

[0042] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A needle assembly, comprising a needle body and a plastic needle holder; characterized in that: The needle body includes a base plate and a side plate; the base plate has a needle tip end and a needle tail end in the length direction, and two sides in the width direction; the side plate extends continuously along the length direction of each side plate, and has a first side connected to the side plate and a second side away from the first side plate. The substrate is provided with at least one set of first cut-out portions; the first cut-out portions have open ends extending to both sides; The side panel is provided with a second cutout portion extending from the first side to the second side; and the side panel is provided with a plurality of third cutout portions extending from the second side to the first side; the second cutout portions and the third cutout portions have an interlacing portion in the width direction of the side panel; The plastic needle holder is injection molded onto the needle body and wraps around the substrate and side plate; and the first cutout portion, the second cutout portion and the third cutout portion are all located inside the plastic needle holder, and the interior of the first cutout portion, the second cutout portion and the third cutout portion is filled with a portion of the plastic needle holder.

2. The needle assembly according to claim 1, characterized in that: A second cut-out portion is provided for each of the first cut-out portions; the open end of the first cut-out portion is connected to the end of the second cut-out portion located on the first side at the corresponding position.

3. A needle assembly according to claim 1, characterized in that: A gap is formed between the second cutout portion and the second side, and between the third cutout portion and the first side.

4. A needle assembly according to claim 1, characterized in that: An outer extension portion extends from the needle tail end of the substrate toward the direction away from the needle tip end; a fourth cutout portion extends from the two side edges of the outer extension portion in the width direction toward the opposite inward side; and a fifth cutout portion extends from the free end of the outer extension portion toward the needle tail end. Wherein, the fourth cutout portion and the fifth cutout portion have an intersecting portion in the width direction of the outer extension portion; The outer extension, the fourth cutout portion, and the fifth cutout portion are all located inside the plastic needle holder, and the interior of the fourth cutout portion and the fifth cutout portion is filled with a portion of the plastic needle holder.

5. A needle assembly according to claim 4, characterized in that: A gap is formed between the fourth cutout portions on both sides in the width direction of the outer extension.

6. A needle assembly according to claim 1, characterized in that: The substrate has puncture sections and assembly sections arranged at intervals along its length; the width of the puncture section is smaller than that of the assembly section; the needle tip is formed on the puncture section, and the needle tail is formed on the assembly section; the first cutout portion is located on the assembly section, and the second cutout portion and the third cutout portion are both arranged corresponding to the assembly section.

7. A needle assembly according to claim 1, characterized in that: The needle body is made of metal.

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