Thin-wall needle head
By designing an eccentric structure and a frustum-shaped channel on the thin-walled needle, the contradiction between the puncture ability and structural strength of the thin-walled needle is resolved, and the puncture effect and comfort of use are improved.
Patent Information
- Application Number
- CN202422405411.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-05
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-10-05
AI Technical Summary
During the puncture process, existing thin-walled needles have strong puncture ability and weak discomfort, but the thin-wall characteristics make it impossible to optimize the incision taper, affecting the puncture effect.
A thin-walled needle is designed with an eccentrically set needle body to form thick and thin side walls. The thick side wall provides structural strength, the thick side incision provides a sharp angle, and the thin side incision provides excellent puncture effect. The needle tip is optimized through passivation treatment and combined with a frustum-shaped channel structure to improve the smoothness of puncture.
It achieves the goal of improving puncture ability and structural strength, reducing discomfort, and improving puncture efficiency and smoothness while maintaining a low internal volume.
Smart Images
Figure CN223323850U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of needle structures, in particular to a thin-walled needle. Background Art
[0002] A thin-walled needle is a medical device designed for injecting or withdrawing liquids. It features a thinner wall. This design results in a lower internal volume, reducing the amount of liquid left during the injection or withdrawal process. Thin-walled needles are often used for precise dosing of medications, particularly when precise dosing control is required. The thin-wall design can also reduce patient discomfort during use.
[0003] During the puncture process, the stronger the puncture force at the front end of the needle, the less discomfort is felt. Similarly, the smaller the taper of the incision, the less discomfort is felt during the puncture process. However, the thin-walled nature of thin-walled needles results in a smaller incision, making the taper impossible to optimize. Utility Model Content
[0004] The main purpose of the utility model is to provide a thin-walled needle, aiming to solve the contradiction between reducing the needle wall thickness, increasing the injection tube diameter and the structural embedded end and puncture performance.
[0005] In order to achieve the above object, the utility model provides a thin-walled needle, comprising:
[0006] The needle body has an injection channel running through its central axis, the outer diameter of the needle body is 1.9 to 2.1 times the inner diameter of the injection channel, the injection channel is eccentrically arranged with the needle body, and a thick side wall and a thin side wall are formed on the needle body, the thickness of the thick side wall is 1.5 to 2.3 times the thickness of the thin side wall, the top end of the needle body in the length direction is provided with a top bevel cut to form a needle tip, the width direction of the top bevel cut is from the thick side wall to the thin side wall, and the two ends of the top bevel cut in the width direction are provided with intersecting thick side cuts and thin side cuts, wherein the thick side cut is provided in the thick side wall, and the thin side cut is provided in the thin side wall, and the slope of the thick side cut with respect to the length direction of the needle body is 0.4 to 0.6 times the slope of the thin side cut with respect to the length direction of the needle body;
[0007] The needle plug is connected to the bottom end of the needle body in the length direction.
[0008] Furthermore, in the width direction of the top oblique incision, the thick side incision and the thin side incision intersect at a position corresponding to the central axis of the injection channel.
[0009] Furthermore, the needle tip is passivated outside the thick side incision and the thin side incision.
[0010] Furthermore, the thin-walled needle also includes a syringe, and the two ends of the syringe in the length direction are respectively a mounting port and a connecting port, a piston portion is movably arranged in the mounting port, and a first frustum-shaped channel passes through the connecting port in the length direction, wherein the end of the first channel away from the mounting port is a necked end.
[0011] Furthermore, a frustum-shaped second channel is passed through the needle plug in the length direction, wherein the end of the second channel away from the needle body is a flared end.
[0012] Furthermore, the taper of the first channel is between 1:10 and 1:5.
[0013] Furthermore, the included angle between the thick side incision and the length direction of the needle body is 15 to 30 degrees, and the included angle between the thin side incision and the length direction of the needle body is 25 to 45 degrees.
[0014] Furthermore, the angle between the top oblique cut and the length direction of the needle body is 15 to 25 degrees.
[0015] Furthermore, the size of the thick side incision in the length direction of the needle body is 2 to 3 times the size of the thin side incision in the length direction of the needle body.
[0016] Furthermore, the needle tip is made of stainless steel.
[0017] The thin-walled needle provided by the utility model has an outer diameter of the needle body that is 1.9 to 2.1 times the inner diameter of the injection channel. The injection channel and the needle body are eccentrically arranged, and thick side walls and thin side walls are formed on the needle body, with the thick side walls providing greater structural strength; the wall thickness of the thick side wall is relatively large, so that the thick side incision can provide a sharper angle, which can provide an excellent auxiliary puncture effect; and the angle of the thin side incision formed on the thin side wall is smaller, providing a better auxiliary puncture effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic diagram of a thin-walled needle according to the first embodiment of the present invention (first angle);
[0019] Figure 2 yes Figure 1 A partial enlarged view of
[0020] Figure 3 This is a schematic diagram of the thin-walled needle of the first embodiment of the present utility model (second angle);
[0021] Figure 4 yes Figure 3 A partial enlarged view of
[0022] Figure 5 It is a partial cross-sectional view of a thin-walled needle according to a second embodiment of the present invention;
[0023] Figure 6 yes Figure 5 A partial enlarged view of
[0024] Figure 7 It is a partial cross-sectional view of a thin-walled needle according to the third embodiment of the present utility model;
[0025] Figure 8 yes Figure 7 A partial enlarged view of .
[0026] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0027] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0028] Those skilled in the art will understand that, unless expressly stated otherwise, the singular forms "a", "an", "said", "above" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements, units, modules and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. In addition, "connected" or "coupled" as used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.
[0029] Those skilled in the art will understand that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as those generally understood by those skilled in the art in the field to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless specifically defined as herein.
[0030] Reference Figures 1 to 8 In one embodiment of the present invention, a thin-walled needle comprises:
[0031] The needle body 100 has an injection channel 110 running through its central axis. The outer diameter of the needle body 100 is 1.9 to 2.1 times the inner diameter of the injection channel 110. The injection channel 110 is eccentrically arranged with the needle body 100. A thick side wall 120 and a thin side wall 130 are formed on the needle body 100. The thickness of the thick side wall 120 is 1.5 to 2.3 times the thickness of the thin side wall 130. The top of the needle body 100 in the longitudinal direction is provided with a top bevel cut 140 to form a needle tip. The width direction of the opening 140 is from the thick side wall 120 to the thin side wall 130, and the top oblique cut 140 is provided with intersecting thick side cuts 150 and thin side cuts 160 at both ends in the width direction, wherein the thick side cuts 150 are provided on the thick side wall 120, and the thin side cuts 160 are provided on the thin side wall 130, and the slope of the thick side cuts 150 with respect to the length direction of the needle body 100 is 0.4 to 0.6 times the slope of the thin side cuts 160 with respect to the length direction of the needle body 100;
[0032] The pintle 200 is connected to the bottom end of the needle body 100 in the longitudinal direction.
[0033] In the prior art, during the puncture process, the stronger the puncture ability of the front end of the needle, the weaker the discomfort generated; the smaller the taper of the incision, the weaker the discomfort generated during the puncture process; but the thin-walled characteristics of the thin-walled needle itself make the size of the incision smaller, so the taper of the incision cannot be optimized.
[0034] In this embodiment, an injection channel 110 extends through the central axis of the needle body 100. The needle body 100 is preferably sized 25 to 27. Specifically, the inner diameter of the injection channel 110 is approximately 0.20 to 0.25 mm, and the outer diameter of the needle body 100 is approximately 0.40 to 0.50 mm. The outer diameter of the needle body 100 is 1.9 to 2.1 times the inner diameter of the injection channel 110. The injection channel 110 is eccentrically positioned relative to the needle body 100, and a thick sidewall 120 and a thin sidewall 130 are formed on the needle body 100. The thick sidewall 120 is 1.5 to 2.3 times the thickness of the thin sidewall 130. The eccentric positioning creates the thick sidewall 120, which provides greater structural strength. A beveled notch 140 is provided at the top of the needle body 100, forming the needle tip. The needle tip is the primary site for puncture. However, the curved tip of the needle tip leaves room for improvement in puncture effectiveness. The width direction of the top bevel cutout 140 is from the thick sidewall 120 to the thin sidewall 130. The top bevel cutout 140 is provided with intersecting thick side cutouts 150 and thin side cutouts 160 at both ends of the width direction. The thick side cutouts 150 and thin side cutouts 160 assist the needle tip in completing the puncture. The thick side cutout 150 is provided on the thick sidewall 120, while the thin side cutout 160 is provided on the thin sidewall 130. The slope of the thick side cutout 150 relative to the length of the needle body 100 is 0.4 to 0.6 times the slope of the thin side cutout 160 relative to the length of the needle body 100. Due to the relatively large thickness of the thick sidewall 120, the thick side cutout 150 provides a sharper angle, providing superior puncture assistance. The thin side cutout 160 formed on the thin sidewall 130 has a smaller angle, providing a better puncture assistance effect.
[0035] The pintle 200 is connected to the bottom end of the needle body 100 in the length direction, providing a basis for fixing the needle body 100 .
[0036] In summary, the outer diameter of the needle body 100 is 1.9 to 2.1 times the inner diameter of the injection channel 110. The injection channel 110 and the needle body 100 are eccentrically arranged, and a thick side wall 120 and a thin side wall 130 are formed on the needle body 100, with the thick side wall 120 providing greater structural strength; the wall thickness of the thick side wall 120 is relatively large, so that the thick side incision 150 can provide a sharper angle, which can provide an excellent auxiliary puncture effect; and the angle of the thin side incision 160 formed on the thin side wall 130 is smaller, providing a better auxiliary puncture effect.
[0037] In one embodiment, in the width direction of the top oblique incision 140 , the thick side incision 150 and the thin side incision 160 intersect at a position corresponding to the central axis of the injection channel 110 .
[0038] In this embodiment, the thick-side incision 150 and the thin-side incision 160 are disposed on both sides of the injection channel 110 , thereby making full use of the space and providing conditions for the extension of the thick-side incision 150 and the thin-side incision 160 .
[0039] In one embodiment, the needle tip is passivated outside the thick side cutout 150 and the thin side cutout 160 .
[0040] In this embodiment, to prevent unnecessary skin incisions at the top bevel incision 140, except for the thick side incision 150 and the thin side incision 160, the needle tip portion other than the thick side incision 150 and the thin side incision 160 is chemically passivated. This allows the thick side incision 150 and the thin side incision 160 to complete the puncture, and the subsequent portion of the needle tip follows suit. During the passivation process, the passivation solution is prevented from contacting the thick side incision 150 and the thin side incision 160.
[0041] Reference Figures 7 to 8 In one embodiment, the thin-walled needle further comprises a syringe 300, the two ends of the syringe 300 in the length direction are respectively a mounting port 310 and a connecting port 320, a piston portion 330 is movably provided in the mounting port 310, and a first frustum-shaped channel 321 is passed through the connecting port 320 in the length direction, wherein the end of the first channel 321 away from the mounting port 310 is a conical end.
[0042] In this embodiment, since the diameter of the injection channel 110 on the needle body 100 is very small, the injection material encounters greater resistance in the injection channel 110, thereby increasing the driving force required to operate the piston portion 330. By restricting the first channel 321 on the connecting port 320 of the syringe 300 to a frustum shape, the injection material in the syringe 300 can be more smoothly transferred to the needle body 100.
[0043] Reference Figures 5 to 6 In one embodiment, a frustum-shaped second channel 210 is passed through the needle plug 200 in the length direction, wherein the end of the second channel 210 away from the needle body 100 is a flared end.
[0044] In this embodiment, the second channel 210 on the needle plug 200 is configured to be in a frustum shape, which, similar to the first channel 321 in the aforementioned embodiment, can also improve the smoothness of the injection process.
[0045] In one embodiment, the taper of the first channel 321 is between 1:10 and 1:5.
[0046] In this embodiment, a better performance is achieved by limiting the taper of the first channel 321. If the taper of the first channel 321 is too small, the optimization effect is weak; if the taper of the first channel 321 is too large, the processing is more difficult and the size of the pintle 200 is increased.
[0047] In one embodiment, the included angle between the thick side incision 150 and the length direction of the needle body 100 is 15 to 30 degrees, and the included angle between the thin side incision 160 and the length direction of the needle body 100 is 25 to 45 degrees.
[0048] In this embodiment, the slopes of the thick-side incision 150 and the thin-side incision 160 are restricted. Due to the slightly greater wall thickness at the location of the thick-side incision 150, a relatively smaller angle can be formed; whereas due to the slightly less wall thickness at the location of the thin-side incision 160, only a relatively larger angle can be formed. Specifically, the angles between the thick-side incision 150 and the length of the needle body 100 and the angles between the thin-side incision 160 and the length of the needle body 100 are adaptively designed based on the eccentricity between the injection channel 110 and the needle body 100, as well as the wall thickness of the needle body 100 at the corresponding locations.
[0049] In one embodiment, the angle between the top bevel cut 140 and the length direction of the needle body 100 is 15 to 25 degrees.
[0050] In this embodiment, the angle formed by the top bevel cut 140 is smaller, thereby being able to form a more superior puncture effect. Of course, the angle of the top bevel cut 140 affects the way the medicine flows out during the injection process.
[0051] In one embodiment, the size of the thick side incision 150 in the length direction of the needle body 100 is 2 to 3 times the size of the thin side incision 160 in the length direction of the needle body 100 .
[0052] In this embodiment, the dimensional relationship between the thick-side cutout 150 and the thin-side cutout 160 is limited in terms of length.
[0053] In one embodiment, the needle tip is made of stainless steel.
[0054] In this embodiment, the needle tip is made of the most common stainless steel, which is low in cost under the premise of mature technology. In other embodiments, it can also be made of alloy structures such as titanium alloy.
[0055] To sum up, the thin-walled needle provided by the present invention has an outer diameter of the needle body 100 that is 1.9 to 2.1 times the inner diameter of the injection channel 110. The injection channel 110 and the needle body 100 are eccentrically arranged, and a thick side wall 120 and a thin side wall 130 are formed on the needle body 100, with the thick side wall 120 providing greater structural strength; the wall thickness of the thick side wall 120 is relatively large, so that the thick side incision 150 can provide a sharper angle, which can provide an excellent auxiliary puncture effect; and the angle of the thin side incision 160 formed on the thin side wall 130 is smaller, providing a better auxiliary puncture effect.
[0056] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A thin-walled needle, characterized in that: include: The needle body (100) has an injection channel (110) passing through its central axis. The outer diameter of the needle body (100) is 1.9 to 2.1 times the inner diameter of the injection channel (110). The injection channel (110) and the needle body (100) are eccentrically arranged. A thick side wall (120) and a thin side wall (130) are formed on the needle body (100). The thickness of the thick side wall (120) is 1.5 to 2.3 times the thickness of the thin side wall (130). The top end of the needle body (100) in the longitudinal direction is provided with a top bevel cut (140) to form a needle tip. The top bevel cut The width direction of (140) is from the thick side wall (120) to the thin side wall (130), and the top oblique cut (140) is provided with intersecting thick side cuts (150) and thin side cuts (160) at both ends in the width direction, wherein the thick side cut (150) is provided on the thick side wall (120), and the thin side cut (160) is provided on the thin side wall (130), and the slope of the thick side cut (150) and the length direction of the needle body (100) is 0.4 to 0.6 times the slope of the thin side cut (160) and the length direction of the needle body (100); The needle plug (200) is connected to the bottom end of the needle body (100) in the length direction.
2. The thin-walled needle according to claim 1, characterized in that In the width direction of the top oblique incision (140), the thick side incision (150) and the thin side incision (160) intersect at a position corresponding to the central axis of the injection channel (110).
3. The thin-walled needle according to claim 1, characterized in that The needle tip is passivated outside the thick side incision (150) and the thin side incision (160).
4. The thin-walled needle according to claim 1, characterized in that The thin-walled needle also includes a syringe (300), wherein the two ends of the syringe (300) in the length direction are respectively a mounting port (310) and a connecting port (320), a piston portion (330) is movably provided in the mounting port (310), and a first frustum-shaped channel (321) is passed through the connecting port (320) in the length direction, wherein the end of the first channel (321) away from the mounting port (310) is a conical end.
5. The thin-walled needle according to claim 4, characterized in that: A second conical-shaped channel (210) is passed through the needle plug (200) in the longitudinal direction, wherein the end of the second channel (210) away from the needle body (100) is a flared end.
6. The thin-walled needle according to claim 4, characterized in that The taper of the first channel (321) is between 1:10 and 1:
5.
7. The thin-walled needle according to any one of claims 1 to 6, characterized in that: The included angle between the thick side incision (150) and the length direction of the needle body (100) is 15 to 30 degrees, and the included angle between the thin side incision (160) and the length direction of the needle body (100) is 25 to 45 degrees.
8. The thin-walled needle according to any one of claims 1 to 6, characterized in that: The angle between the top oblique cut (140) and the length direction of the needle body (100) is between 15 and 25 degrees.
9. The thin-walled needle according to any one of claims 1 to 6, characterized in that: The size of the thick side incision (150) in the length direction of the needle body (100) is 2 to 3 times the size of the thin side incision (160) in the length direction of the needle body (100).
10. The thin-walled needle according to any one of claims 1 to 6, characterized in that: The needle tip is made of stainless steel.