Lacrimal point plug

Abstract

The utility model discloses a punctum plug, which relates to the technical field of medical machinery and comprises a middle shaft, a conical head is arranged at one end of the middle shaft, an arc top is arranged at the other end of the middle shaft, a concave hollow groove is arranged between the conical head and the middle shaft, and a lower cambered surface with a slope-shaped cross section is arranged on one side of the conical head, which is positioned on the hollow groove. A spherical groove with a circular cross section is formed in the root of the hollow groove; a concave upper cambered surface is arranged on one side, corresponding to the conical head, of the arc top. The thickened lower cambered surface is arranged in the hollow groove, the spherical groove is formed in the bottom of the hollow groove, the supporting strength of the side portion of the conical head can be effectively improved, deformation of the conical head is avoided, the risk of cracking of the conical head is reduced, and the lacrimal point plug can be conveniently placed into the lacrimal passage. The upper portion of the conical head and the lower portion of the arc top can be tightly clamped and attached to the lacrimal passage tissue, and the risk that the punctum plug falls off can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to a tear point plug. Background Art

[0002] Punctal plugs block the tear duct to limit or reduce the amount of tears discharged from the eye, prolong the time tears stay on the eye surface and play a lubricating role, thereby achieving the purpose of treating dry eyes. Punctal plugs are divided into two types: through-hole and non-through-hole structures. Non-through-hole punctal plugs have a hollow groove design (such as Figure 1 During clinical punctal plug implantation, the tip of the punctal plug is subjected to inward force on both sides. When points A and B on either side of the punctal plug are under stress, excessive force can easily cause excessive deformation at these points, leading to tearing of the punctal plug and other unknown risks. Furthermore, the horizontal design of the side of the head opposite the top of a non-through punctal plug makes it a crucial area for tissue fixation. However, due to tissue deformation, the fixation and fit are poor, posing a risk of the punctal plug falling off. Utility Model Content

[0003] The utility model aims to solve the shortcomings of the prior art of tearing and detaching-prone tearing point plugs, and proposes a tearing point plug.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A tear plug is designed, comprising a central axis, a conical head being provided at one end of the central axis and a circular arc top being provided at the other end, a concave hollow groove being provided between the conical head and the central axis, a lower arc surface being provided on one side of the hollow groove of the conical head and having a sloped cross-section, and a spherical groove being provided at the root of the hollow groove; and an upper concave arc surface being provided on the side of the circular arc top corresponding to the conical head.

[0006] Furthermore, the curvature of the upper edge of the lower arc surface extends to the edge of the conical head, and the lower arc surface bulges upward to form a thickened reinforcement portion in the hollow groove.

[0007] Furthermore, a central hole with a blind hole structure is provided on the axis center of the central shaft.

[0008] Furthermore, a tapered groove is provided at the bottom of the central hole.

[0009] The present invention proposes a lacrimal plug, which has the following beneficial effects: by providing a thickened lower arc surface in the hollow groove, the present invention can effectively improve the support strength of the conical head on the side, and can reduce the risk of the conical head being fractured by stress; by providing a spherical groove at the bottom of the hollow groove, the root of the hollow groove forms an annular support, which can effectively improve the support strength of the hollow groove root for the conical head, avoid deformation of the conical head, and make it easier for the lacrimal plug to be placed in the tear duct. In addition, by providing the lower arc surface and the upper arc surface, after the lacrimal plug is placed in the tear duct, the upper part of the conical head and the lower part of the arc top can be tightly fixed and fitted with the tear duct tissue, which can reduce the risk of the lacrimal plug falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0011] Figure 1 It is a structural diagram of an existing punctal plug;

[0012] Figure 2 It is a structural diagram of the tear point plug in the present invention;

[0013] The markings in the figure are: 1, central axis; 11, center hole; 2, conical head; 21, lower arc surface; 22, spherical groove; 23, conical groove; 3, arc top; 31, upper arc surface; 4, hollow groove. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0015] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0016] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0017] The structural features of the present invention are now described in detail with reference to the accompanying drawings.

[0018] See also Figure 2 A tear plug includes a central axis 1, a central hole 11 with a blind hole structure is provided on the axis center of the central axis 1, and a tapered groove 23 is provided at the bottom of the central hole 11. One end of the central axis 1 is provided with a conical head 2, and the other end is provided with an arc top 3. An inwardly concave hollow groove 4 is provided between the conical head 2 and the central axis 1, so that a suspended structure is formed between the conical head 2 and the central axis 1. The conical head 2 is located on one side of the hollow groove 4 and is provided with a lower arc surface 21 with a sloped cross-section. The curvature of the upper edge of the lower arc surface 21 extends to the edge of the conical head 2, so that there is no plane structure on the side of the conical head 2 corresponding to the arc top 3, so that the edge of the conical head 2 forms a hook body, and the smooth lower arc surface 21 can enable the lacrimal tissue to better enter the hollow groove 4, so that the tissue below the lacrimal point is more closely attached to the groove wall of the hollow groove 4, forming the lower limit positioning of the lacrimal plug, and the lower arc surface 21 bulges upward to form a thickened reinforced groove wall in the hollow groove 4. The thickened edge of the conical head 2 has better supporting strength, which can prevent the conical head 2 from cracking during installation. The root of the hollow groove 4 is provided with a spherical groove 22 with a circular cross section. The spherical groove 22 structure can evenly distribute the force at the root of the hollow groove 4 to the spherical groove 22, which can effectively improve the supporting strength of the root of the spherical groove 22 and provide better support.

[0019] A concave upper arc surface 31 is provided on one side of the arc top 3 corresponding to the conical head 2. The upper arc surface 31 is concave inward, and the smooth upper arc surface 31 can make the tissue above the lacrimal point better enter the inner cavity of the arc top 3, so that the tissue above the lacrimal point can be more tightly attached to the inner groove wall of the arc top 3, forming the upper limit positioning of the lacrimal point plug. The lacrimal point plug can effectively improve the fixation of the lacrimal point plug in the lacrimal point by forming upper and lower limit positioning in the lacrimal point, reducing the risk of the lacrimal point plug detaching.

[0020] The tear plug of the present invention, by providing a thickened lower arc surface 21 in the hollow groove 4, can effectively improve the support strength of the conical head 2 on the side, and can reduce the risk of the conical head 2 being fractured by stress. By providing a spherical groove 22 at the bottom of the hollow groove 4, the root of the hollow groove 4 forms an annular support, which can effectively improve the support strength of the root of the hollow groove 4 on the conical head 2, avoid deformation of the conical head 2, and make it more convenient for the tear plug to be placed in the tear duct. In addition, by providing the lower arc surface 21 and the upper arc surface 31, after the tear plug is placed in the tear duct, the upper part of the conical head 2 and the lower part of the arc top 3 can be tightly fixed and fitted with the tear duct tissue, which can reduce the risk of the tear plug falling off.

[0021] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A tear plug, comprising a central axis (1), wherein one end of the central axis (1) is provided with a conical head (2), the other end is provided with a circular arc top (3), and an inwardly concave hollow groove (4) is provided between the conical head (2) and the central axis (1), characterized in that: The conical head (2) is provided with a lower arc surface (21) with a sloped cross section on one side of the hollow groove (4), and the root of the hollow groove (4) is provided with a spherical groove (22) with a circular cross section; A concave upper arc surface (31) is provided on one side of the circular arc top (3) corresponding to the conical head (2).

2. A punctal plug according to claim 1, characterized in that: The curvature of the upper edge of the lower arc surface (21) extends to the edge of the conical head (2), and the lower arc surface (21) bulges upward to form a thickened reinforcement portion in the hollow groove (4).

3. A punctal plug according to claim 1, characterized in that: A central hole (11) with a blind hole structure is provided on the axis of the central shaft (1).

4. A punctal plug according to claim 3, characterized in that: A tapered groove (23) is provided at the bottom of the central hole (11).

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