A syringe needle

Abstract

The present application relates to a kind of syringe needle, including needle mechanism and limiting sleeve mechanism;The needle mechanism includes needle seat;The outer side wall of needle seat is equipped with multiple identical clamping strips;Limiting sleeve mechanism is sleeved on the outer side wall of needle mechanism;The side wall of limiting sleeve mechanism is equipped with multiple identical first via holes;The middle lower part of clamping strip is penetrated in limiting sleeve mechanism by first via hole.The syringe needle of the present application is easy to operate during use, not only improves the utilization rate of drug, but also improves the convenience of use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of needles, in particular, to a syringe needle. BACKGROUND

[0002] Diseases of the fundus are increasingly becoming the main eye diseases that cause serious vision loss or even blindness in the middle-aged and elderly. It is difficult to deliver drugs to the target tissues in the posterior segment of the eye through traditional drug therapy (such as oral drugs and eye drops), so it is particularly important to develop an effective ocular drug delivery system.

[0003] At present, intravitreal injection, subretinal injection and suprachoroidal injection are three main drug delivery routes for treating diseases of the fundus.

[0004] Among them, in the drug delivery route of ophthalmic gene therapy products, intravitreal injection hinders drug penetration to the lesion site to some extent due to the limitation of the internal limiting membrane of the retina, thereby reducing the biological activity of the drug. More importantly, a large number of studies have shown that intravitreal injection can cause significant intraocular inflammatory reactions. Due to these potential risks, the intravitreal injection route is currently not recommended for use.

[0005] Subretinal injection is considered a reasonable and feasible ocular drug delivery route because it can directly deliver drugs to the lesion site. However, it must be performed after intravitreal surgery, which can cause damage to the intraocular tissues, such as damage to the lens and the formation of cataracts. In addition, subretinal injection is difficult to operate and can easily cause damage to the eye tissues, such as retinal damage, hemorrhage and macular hole. In addition, a certain volume of liquid needs to be injected, which can cause artificial local retinal detachment. If the detached retina cannot be quickly repositioned, the retinal cells at the detachment site can degenerate, thereby affecting the visual function. In addition, the injected liquid does not diffuse in the subretinal space after injection and is usually limited to the area around the injection site. Therefore, subretinal injection is not effective for the treatment of diseases that require targeting of the peripheral retina.

[0006] However, suprachoroidal injection is a revolutionary minimally invasive drug delivery route developed in recent years, which can minimize the risk of off-target effects, has high safety and high bioavailability.

[0007] However, when using a conventional ophthalmic injector needle for suprachoroidal injection, on the one hand, the needle does not have a limiting sleeve device, and the needle tube is long, making the operation difficult during use. On the other hand, the length of the total bevel of the existing needle is too long, which cannot completely deliver the target drug to the suprachoroidal space, resulting in low drug utilization. In addition, the needle in the prior art is not convenient to separate from the injector when the protective cap is sleeved, which is not user-friendly and cannot meet the use needs of clinics and patients. SUMMARY

[0008] Based on the above, the present application provides a syringe needle, which is easy to operate, has high drug utilization rate and good convenience during use, and can solve the problems of the corresponding needle in the prior art.

[0009] To achieve the foregoing object, the present application adopts the following technical scheme:

[0010] A syringe needle comprises a needle mechanism and a limiting sleeve mechanism; the needle mechanism comprises a needle seat; a plurality of identical clamping strips are arranged on the outer sidewall of the needle seat; the limiting sleeve mechanism is arranged on the outer sidewall of the needle mechanism; a plurality of identical first through holes are arranged on the sidewall of the limiting sleeve mechanism; and the middle and lower parts of the clamping strips penetrate the limiting sleeve mechanism through the first through holes.

[0011] In a preferred embodiment, the clamping strips can be linear clamping strips or curved clamping strips, preferably, the clamping strips are curved clamping strips, and the middle and lower parts of the curved clamping strips are matched with the first through holes.

[0012] In a preferred embodiment, the needle mechanism further comprises a needle tube connected to the needle seat; one end of the needle tube is provided with a beveled part; the beveled part comprises a first bevel and two identical second bevels; the two identical second bevels are symmetrically connected to the opposite ends of the first bevel; one end of one of the second bevels intersects one end of the other second bevel to form a needle tip.

[0013] Further, the needle tip is arranged on the central axis of the needle tube, and the specification of the needle tube is a standard needle tube of 30G-33G.

[0014] Preferably, the specification of the needle tube is a standard needle tube of 30G.

[0015] In a preferred embodiment, along the direction of the central axis of the needle tube, the sum of the length of one of the first bevels and the length of one of the second bevels is the length of the total bevel, the length of the total bevel is 0.55-0.8mm; the ratio of the length of the first bevel to the length of the total bevel is 1:2-3:5, and the ratio of the length of the second bevel to the length of the total bevel is 2:5-1:2.

[0016] Preferably, the length of the total bevel is 0.7mm, the ratio of the length of the first bevel to the length of the total bevel is 1:2, and the ratio of the length of the second bevel to the length of the total bevel is also 1:2.

[0017] In a preferred embodiment, the bottom of the limiting sleeve mechanism is further provided with a second through hole, and the needle tube penetrates through the second through hole to the limiting sleeve mechanism, thereby limiting the length of the needle tube extending outside the limiting sleeve mechanism to meet the needs of suprachoroidal injection.

[0018] Further, when the limiting sleeve mechanism is sleeved on the outer sidewall of the needle mechanism, the length of the needle tube extending outside the limiting sleeve mechanism is 700-1300 microns.

[0019] Preferably, the length of the needle tube extending outside the limiting sleeve mechanism is 900 microns.

[0020] In a preferred embodiment, the protective cap mechanism is further detachably sleeved on the outer sidewall of the limiting sleeve mechanism, and the inner sidewall of the protective cap mechanism is provided with a plurality of identical limiting strips, and a limiting groove is formed between adjacent two limiting strips, and the limiting groove is matched with the clamping strip.

[0021] In a preferred embodiment, the width of the limiting groove is greater than the thickness of the clamping strip, so that the matching between the limiting groove and the clamping strip is more convenient.

[0022] In a preferred embodiment, the middle upper part of the inner sidewall of the protective cap mechanism is further provided with a plurality of identical first anti-skid strips, and the outer sidewall of the protective cap mechanism is further provided with a plurality of identical second anti-skid strips; when the protective cap mechanism is sleeved on the outer sidewall of the limiting sleeve mechanism, the outer sidewall of the limiting sleeve mechanism abuts against the first anti-skid strip, thereby connecting the limiting sleeve mechanism and the protective cap mechanism.

[0023] Further, the outer sidewall of the limiting sleeve mechanism is further provided with an arc-shaped clamping groove, and the first anti-skid strip is provided with an arc-shaped clamping block; when the protective cap mechanism is sleeved on the outer sidewall of the limiting sleeve mechanism, the arc-shaped clamping groove is matched with the arc-shaped clamping block.

[0024] In a preferred embodiment, the needle mechanism and the limiting sleeve mechanism are gap matched, and the needle mechanism and the limiting sleeve mechanism are connected by gluing.

[0025] The injector needle provided by the application has the following beneficial effects:

[0026] In the technical scheme adopted by the application, the limiting sleeve mechanism is sleeved on the outer sidewall of the needle mechanism, and the depth of the needle mechanism inserted into the limiting sleeve mechanism is limited, so that the length of the needle tube extending outside the limiting sleeve mechanism is limited, thereby realizing easy operation when the injector needle is used for suprachoroidal injection.

[0027] On the other hand, under the cooperation between the first inclined surface and the second inclined surface, the opening defined by the inclined surface part is ensured to be in the suprachoroidal space, so that the purpose of accurately delivering the drug to the suprachoroidal space is achieved, and the drug utilization rate is effectively improved.

[0028] In addition, the limiting groove inside the protective cap mechanism cooperates with the clamping strip penetrating the limiting sleeve mechanism, so that the needle mechanism can be directly connected with the syringe without dismounting the protective cap mechanism, and the use convenience is improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a perspective view of the needle of the embodiment of the present application;

[0030] Figure 2 It is an exploded view of the needle shown in the figure; Figure 1

[0031] Figure 3 It is an enlarged view of the circle A shown in the figure; Figure 2

[0032] Figure 4 It is a perspective view of the protective cap mechanism in the needle shown in the figure; Figure 1

[0033] Figure 5 It is an enlarged view of the circle B shown in the figure; Figure 4

[0034] Figure 6 It is a perspective view of the protective cap mechanism in the needle shown in the figure; Figure 4

[0035] Figure 7 It is a perspective view of the needle mechanism in the needle shown in the figure; Figure 2

[0036] Figure 8 It is an enlarged view of the circle C shown in the figure; Figure 7

[0037] Figure 9 It is a perspective view of the limiting sleeve mechanism in the needle shown in the figure; Figure 2

[0038] Figure 10 It is a perspective view of the limiting sleeve mechanism in the needle shown in the figure. Figure 9 10-needle mechanism, 11-needle seat, 12-needle tube, 13-clamping strip, 14-inclined surface part, 15-first inclined surface, 16-second inclined surface, 17-needle tip;

[0039]

[0040] ​​​​​​​​​20 - limiting sleeve mechanism, 21 - first via hole, 22 - second via hole, 23 - arc-shaped clamping groove;

[0041] 30 - protective cap mechanism, 31 - limiting strip, 32 - limiting groove, 33 - first anti-skid strip, 34 - arc-shaped clamping block, 35 - second anti-skid strip. DETAILED DESCRIPTION

[0042] The specific embodiments of the present application will be described below with reference to the accompanying drawings and examples, and those skilled in the art can clearly and completely understand the technical solutions of the present application, the technical problems solved and the technical effects produced by the content recorded in the specification. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, in order to facilitate the description, only the parts related to the present application are shown in the drawings.

[0043] It should be noted that the structure, proportion, size, etc. shown in the drawings of the specification are only used to cooperate with the content recorded in the specification for those skilled in the art to understand and read, and do not have technical significance to limit the conditions that can be implemented by the present application. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that can be produced by the present application, should fall within the scope of the technical content disclosed by the present application.

[0044] The cited words such as "first", "second", "the" and the like do not represent quantity limitation, and can represent singular or plural. The terms "include", "contain", "have" and any variations thereof involved in the present application are intended to cover non-exclusive inclusion; for example, a process, method, system, product or device containing a series of steps or modules is not limited to the listed steps or units, but can also include steps or units not listed, or can also include other steps or units inherent to the process, method, product or device. The words such as "connection", "connection", "coupling" and the like involved in the present application are not limited to physical or mechanical connection, but can also include direct or indirect electrical connection.

[0045] Reference Figures 1 to 10 An injection needle for an embodiment of the present application includes a needle mechanism 10, a limiting sleeve mechanism 20 sleeved on the outer wall of the needle mechanism 10, and a protective cap mechanism 30 detachably sleeved on the outer wall of the limiting sleeve mechanism 20.

[0046] The needle mechanism 10 includes a needle seat 11 and a needle tube 12 connected to the needle seat 11; the outer wall of the needle seat 11 is provided with a plurality of identical clamping strips 13; the plurality of identical clamping strips 13 are arranged in a ring shape on the outer wall of the needle seat 11 along the central axis of the needle seat 11.

[0047] The needle tube 12 is provided with a bevel part 14 at one end; the bevel part 14 comprises a first bevel 15 and two identical second bevels 16; the two identical second bevels 16 are respectively symmetrically connected to the opposite ends of the first bevel 15, one end of one second bevel 16 intersects with one end of the other second bevel 16 to form a needle tip 17, and the needle tip 17 is arranged on the central axis of the needle tube 12.

[0048] In the direction of the central axis of the needle tube 12, the sum of the length of one first bevel 15 and the length of one second bevel 16 is the total length of the bevel, and the total length of the bevel is 0.55-0.8mm; the ratio of the length of the first bevel 15 to the total length of the bevel is 1:2-3:5, and the ratio of the length of the second bevel 16 to the total length of the bevel is 2:5-1:2, so as to ensure that the opening defined by the bevel part 14 is in the suprachoroidal space when the target drug is injected through the needle mechanism 10, and the target drug can be accurately delivered to the suprachoroidal space, effectively improving the accuracy of drug use.

[0049] In this embodiment, the total length of the bevel is 0.7mm, the ratio of the length of the first bevel 15 to the total length of the bevel is 1:2, and the ratio of the length of the second bevel 16 to the total length of the bevel is also 1:2. In other embodiments, the total length of the bevel, the ratio of the length of the first bevel 15 to the total length of the bevel, and the ratio of the length of the second bevel 16 to the total length of the bevel can also be other values, as long as they can meet the requirements that the total length of the bevel is 0.55-0.8mm, the ratio of the length of the first bevel 15 to the total length of the bevel is 1:2-3:5, and the ratio of the length of the second bevel 16 to the total length of the bevel is 2:5-1:2.

[0050] The specification of the needle tube 12 is a standard needle tube of 30G-33G. In this embodiment, the specification of the needle tube 12 is a standard needle tube of 30G. In other embodiments, the needle tube 12 can also be a standard needle tube of other specifications, as long as it can meet the requirement that the specification of the needle tube 12 is a standard needle tube of 30G-33G.

[0051] The limiting sleeve mechanism 20 and the needle mechanism 10 are gap-fitted, and the limiting sleeve mechanism 20 and the needle mechanism 10 are connected by means of gluing.

[0052] A plurality of identical first through holes 21 are provided on the side wall of the limiting sleeve mechanism 20, the shape of the first through hole 21 is a waist-shaped through hole, and the plurality of identical first through holes 21 are arranged in a ring shape on the side wall of the limiting sleeve mechanism 20 along the central axis of the limiting sleeve mechanism 20; the middle and lower parts of the clamping strip 13 are penetrated through the limiting sleeve mechanism 20 by cooperating the first through hole 21 with the middle and lower parts of the clamping strip 13.

[0053] The bottom of the limiting sleeve mechanism 20 is also provided with a second through hole 22, and the needle tube 12 penetrates through the limiting sleeve mechanism 20 through the second through hole 22. Specifically, when the limiting sleeve mechanism 20 is sleeved on the outer side wall of the needle head mechanism 10, the length of the needle tube 12 extending out of the limiting sleeve mechanism 20 is 700 μm-1300 μm. In this embodiment, the length of the needle tube 12 extending out of the limiting sleeve mechanism 20 is 900 μm. In other embodiments, the length of the needle tube 12 extending out of the limiting sleeve mechanism 20 can also be other length values according to different use environments, as long as the length of the needle tube 12 extending out of the limiting sleeve mechanism 20 is between 700 μm-1300 μm.

[0054] At the same time, the outer side wall of the bottom of the limiting sleeve mechanism 20 of the injector needle can contact the surface of the target tissue during use, which can limit the length of the needle tube 12 in the needle head mechanism 10 entering the target tissue. Under the limitation of the total length of the inclined surface of the needle tube 12, the injector needle can also meet the use requirements of the suprachoroidal injection drug delivery method when used in the suprachoroidal injection drug delivery method, is easy to operate, and can also accurately deliver the target drug to the suprachoroidal space, thereby effectively improving the utilization rate of the drug.

[0055] In addition, the inner side wall of the limiting sleeve mechanism 20 and the outer side wall of the needle seat 11 in the needle head mechanism 10 are gap-fitted. During production, the distance between the bottom of the needle seat 11 and the top of the limiting sleeve mechanism 20 is adjusted to adjust the depth of the needle head mechanism 10 inserted into the inside of the limiting sleeve mechanism 20, so that after the length of the needle tube 12 extending out of the limiting sleeve mechanism 20 is adjusted to a suitable position, the needle seat 11 is connected with the limiting sleeve mechanism 20.

[0056] The middle and lower part of the inner side wall of the protective cap mechanism 30 is provided with a plurality of same limiting strips 31, and a limiting groove 32 is formed between adjacent two limiting strips 31, and the width of the limiting groove 32 is greater than the thickness of the clamping strip 13. The limiting groove 32 cooperates with the clamping strip 13 to reduce the friction times between the limiting groove 32 and the clamping strip 13 when the protective cap mechanism 30 is sleeved on the outer side wall of the limiting sleeve mechanism 20, thereby effectively reducing the wear degree between the clamping strip 13 and the limiting groove 32.

[0057] The inner side wall of the upper part of the protective cap mechanism 30 is also provided with a plurality of same first anti-skid strips 33. Specifically, when the protective cap mechanism 30 is sleeved on the outer side wall of the limiting sleeve mechanism 20, the first anti-skid strips 33 abut against the outer side wall of the limiting sleeve mechanism 20. In this embodiment, the first anti-skid strips 33 abut against the outer side wall of the limiting sleeve mechanism 20 to realize that the protective cap mechanism 30 can be sleeved on the outer side wall of the limiting sleeve mechanism 20 and closely cooperate through the friction between the first anti-skid strips 33 and the outer side wall of the limiting sleeve mechanism 20.

[0058] Further, the first anti-skid strip 33 is provided with an arc-shaped clamping block 34, and the outer side wall of the limiting sleeve mechanism 20 is further provided with an arc-shaped clamping groove 23; when the protective cap mechanism 30 is sleeved on the outer side wall of the limiting sleeve mechanism 20, the arc-shaped clamping block 34 cooperates with the arc-shaped clamping groove 23. In this embodiment, the arc-shaped clamping block 34 cooperates with the arc-shaped clamping groove 23 to limit the position of the protective cap mechanism 30 sleeved on the limiting sleeve mechanism 20.

[0059] In addition, the outer side wall of the protective cap mechanism 30 is further provided with a plurality of identical second anti-skid strips 35, which can realize the rotation of the protective cap mechanism 30 by pinching the second anti-skid strips 35 with fingers without separately dismounting the protective cap mechanism 30, and the needle mechanism 10 is connected or separated from the luer connector of the syringe under the interaction between the limiting groove 32 and the clamping strip 13, so that the needle mechanism 10, the limiting sleeve mechanism 20 and the protective cap mechanism 30 are connected or separated from the syringe, effectively avoiding the risk of contamination of the needle tube during dismounting, ensuring the cleanliness of the needle tube, and further improving the convenience of using the syringe needle.

[0060] Although the present application has been described and illustrated with reference to the particular embodiments, the descriptions and illustrations of these embodiments are not intended to limit the application. Those of skill in the art can readily recognize variations and modifications of the embodiments without departing from the scope of the application as defined by the claims. Due to manufacturing processes, variations, and the like, there can be differences in the exact dimensions of the structures being disclosed. Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. Modifications and variations are possible in light of the above disclosure. While only certain features of the application have been illustrated and described, many modifications and changes can occur to those skilled in the art (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the disclosure. It is, therefore, intended that all such modifications and changes be included within the scope of the claims. The order of execution or performance of the operations in the figures illustrated and described above is not essential for carrying out the acts according to the disclosure. Accordingly, other sequences can be possible and are intended to fall within the scope of the present application.

Claims

1. A syringe needle, characterized in that The application relates to a needle mechanism, which comprises a needle seat, a plurality of identical clamping strips arranged on the outer side wall of the needle seat, a limiting sleeve mechanism arranged on the outer side wall of the needle mechanism, a plurality of identical first through holes arranged on the side wall of the limiting sleeve mechanism, a middle lower part of the clamping strip penetrating through the limiting sleeve mechanism through the first through holes, a protective cap mechanism detachably arranged on the outer side wall of the limiting sleeve mechanism, a plurality of identical limiting strips arranged on the middle lower part of the inner side wall of the protective cap mechanism, a limiting groove formed between two adjacent limiting strips and matched with the clamping strip, a plurality of identical first anti-skid strips arranged on the middle upper part of the inner side wall of the protective cap mechanism, a plurality of identical second anti-skid strips arranged on the outer side wall of the protective cap mechanism, the outer side wall of the limiting sleeve mechanism abutting against the first anti-skid strips when the protective cap mechanism is arranged on the outer side wall of the limiting sleeve mechanism, an arc-shaped clamping groove arranged on the outer side wall of the limiting sleeve mechanism, an arc-shaped clamping block arranged on the first anti-skid strip, and the arc-shaped clamping groove matched with the arc-shaped clamping block when the protective cap mechanism is arranged on the outer side wall of the limiting sleeve mechanism. The needle mechanism further comprises a needle tube connected to the needle seat, an inclined surface part arranged at one end of the needle tube, a first inclined surface and two identical second inclined surfaces, two identical second inclined surfaces symmetrically connected to the opposite ends of the first inclined surface, and a needle tip formed by the intersection of one end of one second inclined surface and one end of another second inclined surface and arranged on the central axis of the needle tube. The sum of the length of one first inclined surface and the length of one second inclined surface is the total length of the inclined surface, the total length of the inclined surface is 0.55-0.8 mm, the ratio of the length of the first inclined surface to the total length of the inclined surface is 1:2-3:5, and the ratio of the length of the second inclined surface to the total length of the inclined surface is 2:5-1:

2. The bottom of the limiting sleeve mechanism is further provided with a second through hole, and the needle tube penetrates through the limiting sleeve mechanism through the second through hole. The width of the limiting groove is greater than the thickness of the clamping strip. The specification of the needle tube is a standard needle tube with a diameter of 30G-33G, and the length of the needle tube extending out of the limiting sleeve mechanism is 700-1300 mu m when the limiting sleeve mechanism is arranged on the outer side wall of the needle mechanism. The needle mechanism and the limiting sleeve mechanism are connected through a gap fit and a gluing mode.

2. The needle of claim 1 wherein, ​ 3. The needle of claim 2 wherein, ​ 4. The needle of claim 2 wherein, ​ 5. The needle of claim 1 wherein, ​ 6. The needle of claim 4 wherein, ​ 7. The needle of claim 6 wherein, ​

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