An adjustable corneal needle

Abstract

This utility model discloses an adjustable corneal acupuncture device, including a housing with an acupuncture end and an adjustment end, the acupuncture end having a limiting plate on its inner side; an acupuncture assembly including a connecting push rod and an acupuncture needle, the connecting push rod being located inside the housing, the acupuncture needle extending out from the acupuncture end through the limiting plate; and an adjustment assembly including an adjustment push rod extending into the adjustment end and in contact with the connecting push rod, the adjustment push rod being threadedly connected to the adjustment end. By rotating the adjustment push rod threadedly connected to the adjustment end, the length of the adjustment push rod extending into the adjustment end is changed, realizing the adjustability of the acupuncture depth, replacing the traditional fixed depth structure, and minimizing the risk of insufficient surgical effect due to shallow acupuncture and corneal perforation due to excessive acupuncture. At the same time, the acupuncture needle extends out through the limiting plate, which further restricts the radial sway of the connecting push rod and the acupuncture needle, improving the stability and safety of the acupuncture needle.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to an adjustable corneal needle puncturer. Background Technology

[0002] In clinical ophthalmology, corneal acupuncture is an important method for treating bullous keratopathy and correcting corneal curvature. The principle is to puncture the anterior corneal stroma, disrupting the lamellar structure of the cornea and promoting the proliferation of fibrous connective tissue to form a barrier that prevents water leakage, thereby relieving corneal edema symptoms.

[0003] In corneal acupuncture, the needle length and density need to be selected according to the patient's specific condition. However, current corneal stromal acupuncture surgery mainly uses a syringe needle with a bent tip for acupuncture. There is no special instrument for bending the syringe needle, and the length of the bent needle cannot be precisely quantified. Furthermore, since the thickness of the cornea is only 500-1000 micrometers, the acupuncture depth must be precisely controlled to avoid damaging intraocular tissues. If the needle is inserted too shallowly, the surgical effect will not be achieved, and if the needle is inserted too deeply, there is a risk of corneal perforation. At the same time, the connecting rod is prone to displacement, resulting in deviation of the acupuncture angle and uneven acupuncture density, which increases the surgical risk.

[0004] Therefore, there is an urgent need for a more reliable adjustable corneal needle to solve the problems of insufficient surgical effect when the needle is inserted too shallowly, and the risk of corneal perforation when the needle is inserted too deeply. Utility Model Content

[0005] This invention provides an adjustable corneal needle to solve at least one of the above-mentioned technical problems.

[0006] The technical solution adopted by this utility model is as follows: an adjustable corneal needle puncturer, including a housing, the housing including a needle end and an adjustment end, and a limiting plate on the inner side of the needle end; A needle insertion assembly includes a connecting push rod and a needle insertion needle, wherein the connecting push rod is located inside the housing, and the needle insertion needle extends from the needle insertion end through the limiting plate; An adjustment assembly includes an adjustment push rod that extends into the adjustment end and abuts against the connecting push rod. The adjustment push rod is threadedly connected to the adjustment end so that the length of the adjustment push rod extending into the adjustment end can be changed by rotating the adjustment push rod.

[0007] Preferably, a support spring is provided between the connecting push rod and the limiting plate.

[0008] Preferably, either the inner wall of the needle tip or the outer wall of the connecting push rod is provided with a guide rail, and the other is provided with a guide strip.

[0009] Preferably, the adjusting push rod has a through hole, one end of the connecting push rod facing away from the needle end extends into the through hole, and a sealing cap is connected to the through hole.

[0010] Preferably, a blocking ring is formed on the outer side of the connecting push rod to cooperate with the adjusting push rod.

[0011] Preferably, the connecting push rod has a needle replacement hole, the needle replacement hole has a needle replacement seat and a pressure rod that makes a stop contact with the needle replacement seat, and the needle replacement seat is connected to the needle needle.

[0012] Preferably, the sealing cap has a compaction protrusion that extends into the needle replacement hole and makes contact with the needle rod.

[0013] Preferably, the sealing cap has an opening groove that mates with the opening tool.

[0014] Preferably, the adjusting push rod has a rotating handle at the end facing away from the adjusting end.

[0015] Preferably, the outer peripheral wall of the adjustment end is formed with a scale line for indicating the extension length of the acupuncture needle, and the rotating handle has a starting indicator line that cooperates with the scale line.

[0016] Due to the adoption of the above technical solution, the beneficial effects achieved by this utility model are as follows: 1. As a preferred embodiment of this utility model, an adjustable corneal acupuncture device changes the length of the adjusting push rod extending into the adjusting end by rotating the adjusting push rod threaded to the adjusting end, thereby achieving adjustable acupuncture depth, replacing the traditional fixed depth structure, and suitable for different surgical needs; at the same time, the acupuncture needle extends through the limiting plate, and the limiting plate further restricts the radial sway of the connecting push rod and the acupuncture needle, improving the stability of the acupuncture needle.

[0017] In addition, the guide rail on the inner wall of the needle tip works in conjunction with the guide strip on the outer wall of the connecting rod to form a linear motion constraint, preventing the push rod from deviating and causing the needle angle to deviate. This ensures that the needle accurately pierces the cornea in a vertical direction, improving surgical precision and avoiding damage to surrounding tissues.

[0018] 2. As a preferred embodiment of this utility model, the supporting spring between the connecting push rod and the limiting plate provides a restoring force, so that the needle automatically retracts after use, avoiding secondary punctures, while maintaining the stability of the adjusted position. In addition, the adjusting push rod has a through hole with a sealing cap connected to it. The through hole allows the connecting push rod to extend into the device, while the sealing cap prevents dust and bacteria from entering the housing, ensuring a sterile environment for the medical device. The blocking ring on the outside of the connecting push rod contacts the inner wall of the adjusting push rod, limiting the maximum range of motion of the connecting push rod and preventing excessive adjustment that could cause the acupuncture needle to extend too far, thus avoiding surgical risks.

[0019] 3. As a preferred embodiment of this utility model, a needle replacement hole is formed on the connecting push rod, and a needle replacement seat and a pressure rod that abuts against the needle replacement seat are provided in the needle replacement hole. The needle replacement seat and the pressure rod in the needle replacement hole enable quick disassembly and installation of the acupuncture needle, solving the problem that the needle head of the traditional acupuncture device cannot be replaced, reducing the risk of cross-infection. A compaction protrusion is formed on the sealing cover, and the compaction protrusion on the sealing cover extends into the needle replacement hole and presses against the pressure rod to ensure that the acupuncture needle is firmly installed and to prevent the needle head from loosening during surgery.

[0020] 4. In a preferred embodiment of this utility model, an opening groove is formed on the sealing cover to cooperate with the opening tool. The opening groove cooperates with the special tool to facilitate the disassembly of the sealing cover for needle replacement or maintenance.

[0021] 5. In a preferred embodiment of this utility model, a rotating handle is formed at one end of the adjusting rod facing away from the adjusting end. The rotating handle increases the contact area during adjustment, making it easier for doctors to accurately control the rotation angle and improving the operating feel.

[0022] 6. In a preferred embodiment of this utility model, a scale line for indicating the extension length of the needle is formed on the outer peripheral wall of the adjustment end. The scale line of the adjustment end cooperates with the starting indicator line of the rotating handle to intuitively display the extension length of the needle, thus meeting the high requirements for depth control in corneal surgery. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a diagram showing the retracted state of the adjustable corneal needle device of this utility model; Figure 2 This is a diagram showing the replaceable needle extension state of the adjustable corneal needle device of this utility model; Figure 3 This is a schematic diagram of the cooperation structure between the needle-piercing component and the adjusting push rod in this utility model; Figure 4 This is a three-dimensional structural diagram of the connecting push rod in this utility model; Figure 5This is a schematic diagram of the adjustment component in this utility model; Figure 6 This is a three-dimensional structural diagram of the sealing cap in this utility model; Figure 7 This is a schematic diagram of the needle changing assembly in this utility model; Figure 8 This is a schematic diagram showing the connection between the needle changing seat and the needle pressing rod in this utility model; Figure 9 This is a schematic diagram showing the connection between the sealing cap and the connecting push rod in this utility model; Figure 10 This is a schematic diagram of the internal structure of the shell in this utility model.

[0024] Figure label: 1. Housing; 11. Needle-punching end; 111. Guide rail; 12. Adjustment end; 121. Scale line; 13. Limiting plate; 2. Needle assembly; 21. Connecting push rod; 211. Guide bar; 212. Needle changing hole; 22. Needle; 23. Needle changing seat; 24. Needle pressing rod; 25. Support spring; 3. Adjustment assembly; 31. Adjustment push rod; 311. Through hole; 32. Rotary handle; 321. Starting indicator line; 4. Sealing cap; 41. Compacting protrusion; 42. Opening groove; 5. Blocking ring. Detailed Implementation

[0025] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0027] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "aspect," or "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] Example 1: As Figure 1-10 As shown, an adjustable corneal acupuncture device includes a housing 1, which includes an acupuncture end 11 and an adjustment end 12. A limiting plate 13 is located inside the acupuncture end 11. An acupuncture assembly 2 includes a connecting push rod 21 and an acupuncture needle 22. The connecting push rod 21 is located inside the housing 1, and the acupuncture needle 22 extends out of the acupuncture end 11 through the limiting plate 13. An adjustment assembly 3 includes an adjustment push rod 31 that extends into the adjustment end 12 and abuts against the connecting push rod 21. The adjustment push rod 31 is threadedly connected to the adjustment end 12. Rotating the adjustment push rod threadedly connected to the adjustment end 12... 31. Changing the length of the adjusting push rod 31 extending into the adjusting end 12 can achieve adjustable needle depth, replacing the traditional fixed depth structure. Based on the meshing characteristics of the threaded connection, the spiral of the adjusting push rod 31 can be rotated to move within the spiral of the adjusting end 12, thereby achieving minute displacement adjustment, suitable for different surgical needs. On the other hand, the needle 22 extends through the limiting plate 13, and the radial wobbling of the connecting push rod 21 and the needle 22 is further restricted by the blocking of the limiting plate 13, improving the stability of the needle 22.

[0031] Specifically, such as Figure 9 , Figure 10As shown, the guide rail 111 on the inner wall of the needle tip 11 cooperates with the guide strip 211 on the outer wall of the connecting push rod 21 to form a linear motion guide, fix the motion trajectory, prevent the connecting push rod 21 from deviating and causing the needle angle deviation, ensure that the needle 22 accurately pierces the cornea in the vertical direction, improve the stability of the connecting push rod 21, and further improve the surgical precision and avoid damage to surrounding tissues.

[0032] like Figure 3 As shown, there is a support spring 25 between the connecting push rod 21 and the limiting plate 13. When rotating for adjustment, the connecting push rod 21 exerts a force on the support spring 25, at which time the support spring 25 will deform. When the external force disappears or decreases to a certain extent, the atoms or molecules inside the support spring 25 are subjected to elastic force and return to their original positions, thereby restoring the support spring 25 to its initial state. This allows the needle 22 to automatically retract after use, avoiding secondary punctures, while maintaining the stability of the adjusted position.

[0033] Example 2: Figure 4 , Figure 5 and Figure 6 As shown, an adjustable corneal acupuncture device, differing from Embodiment 1, has a connecting rod 21 extending into the through hole 311 of the adjusting rod 31. A sealing cap 4 is connected to the through hole 311 on the adjusting rod 31. The sealing cap 4 prevents dust and bacteria from entering the housing 1, ensuring a sterile environment for the medical device. Furthermore, a retaining ring 5 on the outer side of the connecting rod 21 contacts the inner wall of the adjusting rod 31, limiting the maximum range of movement of the connecting rod 21 and preventing excessive adjustment that could cause the acupuncture needle 22 to extend too far, thus avoiding surgical risks. Specifically, the sealing cap 4 has an opening groove 42 that mates with an opening tool. The opening groove 42, when used with a special tool, facilitates the removal of the sealing cap 4 for needle replacement or maintenance.

[0034] like Figure 7 , Figure 8 As shown, a needle replacement hole 212 is formed on the connecting push rod 21. The needle replacement seat 23 and the needle pressing rod 24 in the needle replacement hole 212 enable the quick disassembly and installation of the acupuncture needle 22, solving the problem that the needle of the traditional acupuncture device cannot be replaced and reducing the risk of cross-infection. In addition, a compaction protrusion 41 is formed on the sealing cover 4. The compaction protrusion 41 on the sealing cover 4 extends into the needle replacement hole 212 and presses against the needle pressing rod 24 to ensure that the acupuncture needle 22 is firmly installed and to prevent the needle from loosening during the operation.

[0035] like Figure 1As shown, the adjusting lever 31 has a rotating handle 32 at the end facing away from the adjusting end 12. The rotating handle 32 increases the contact area during adjustment, making it easier for doctors to precisely control the rotation angle and improving the operating feel. In addition, the outer peripheral wall of the adjusting end 12 has a scale line 121 for indicating the extension length of the needle 22, and the rotating handle 32 has a starting indicator line 321 that cooperates with the scale line 121. By cooperating with the scale line 121 of the adjusting end 12 and the starting indicator line 321 of the rotating handle 32, the extension length of the needle 22 can be displayed intuitively, meeting the high requirements for depth control in corneal surgery.

[0036] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0037] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0038] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. An adjustable corneal needling device, characterized in that, Includes a housing (1), the housing (1) includes a needle end (11) and an adjustment end (12), and the needle end (11) has a limiting plate (13) on its inner side. The needle assembly (2) includes a connecting push rod (21) and a needle (22), the connecting push rod (21) being located inside the housing (1), and the needle (22) extending from the needle end (11) through the limiting plate (13); The adjustment assembly (3) includes an adjustment push rod (31) that extends into the adjustment end (12) and is in contact with the connecting push rod (21). The adjustment push rod (31) is threadedly connected to the adjustment end (12) so that the length of the adjustment push rod (31) extending into the adjustment end (12) can be changed by rotating the adjustment push rod (31).

2. The adjustable corneal needler of claim 1, wherein, A support spring (25) is provided between the connecting push rod (21) and the limiting plate (13).

3. The adjustable corneal needle according to claim 2, characterized in that, A guide rail (111) is formed on either the inner wall of the needle end (11) or the outer wall of the connecting push rod (21), and a guide bar (211) is formed on the other.

4. The adjustable corneal needle according to claim 1 or 3, characterized in that, The adjusting push rod (31) has a through hole (311), and the end of the connecting push rod (21) facing away from the needle end (11) extends into the through hole (311). A sealing cap (4) is connected to the through hole (311).

5. The adjustable corneal needle according to claim 4, characterized in that, A blocking ring (5) is formed on the outer side of the connecting push rod (21) to cooperate with the adjusting push rod (31).

6. The adjustable corneal needle according to claim 5, characterized in that, The connecting push rod (21) has a needle replacement hole (212), the needle replacement hole (212) has a needle replacement seat (23) and a pressure rod (24) that is in contact with the needle replacement seat (23), and the needle replacement seat (23) is connected to the acupuncture needle (22).

7. The adjustable corneal needle according to claim 6, characterized in that, A compaction protrusion (41) is formed on the sealing cap (4), and the compaction protrusion (41) extends into the needle replacement hole (212) and makes contact with the needle rod (24).

8. The adjustable corneal needle according to claim 4, characterized in that, The sealing cap (4) has an opening groove (42) that cooperates with the opening tool.

9. The adjustable corneal needle according to claim 1, characterized in that, The adjusting push rod (31) has a rotating handle (32) at the end facing away from the adjusting end (12).

10. The adjustable corneal needle according to claim 9, characterized in that, The outer peripheral wall of the adjustment end (12) is formed with a scale line (121) for indicating the extension length of the acupuncture needle (22), and the rotating handle (32) has a starting indicator line (321) that cooperates with the scale line (121).

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