Connection structure and snare therefor

Abstract

This utility model belongs to the field of medical device technology, and particularly relates to a connecting structure and its snare. The utility model includes: a rod head cap, suitable for installation at the end of the snare to connect a flexible tube; and a positioning connecting cylinder, which is snapped into the inner side of the rod head cap. By setting the rod head cap and positioning connecting cylinder, and when the rod head cap is placed on the end of the snare, the positioning connecting cylinder squeezes the end of the snare outwards, achieving an interference fit with the rod head cap. This allows for the assembly of three parts in one step, reducing assembly steps and improving convenience, while the interference fit ensures the connection stability between each pair of parts.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and in particular relates to a connecting structure and its snare. Background Technology

[0002] A snare is a medical device used to ligate blood vessels, polyps, or tubular structures, primarily for laparoscopic surgery and endoscopic treatment. Its slip knot is made of absorbable or synthetic sutures; when using materials such as chromium catgut, the water-absorbing and swelling properties enhance the ligation's stability while reducing tissue irritation.

[0003] Utility model patent application number CN202221303825.7 and publication number CN217592993U discloses a snare device with easily adjustable direction. It improves the ease of rotation by using a core rod to drive a push tube, which in turn moves the lasso to the ligation position. After the push tube reaches the working position, rotating the core rod causes both the push tube and the lasso to rotate, allowing the lasso to surround the area to be ligated. The rotating part provides a positioning reference for the core rod during rotation, preventing it from shifting during rotation.

[0004] The above solution focuses on improving ease of use. However, at the head of the snare, the existing connection structure can only assemble two parts at a time, which results in many and complex assembly steps. Furthermore, a large assembly error in one part will affect the subsequent installation of other components.

[0005] Therefore, there is an urgent need to design a connection structure and its snare to solve the technical problems in related technologies where the snare head has many parts with inconsistent hardness and softness, and the connection structure cannot be installed conveniently and reliably.

[0006] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Utility Model Content

[0007] This disclosure provides at least one connection structure and its snare.

[0008] In a first aspect, embodiments of this disclosure provide a connection structure, including: a rod head cap adapted to be installed at the end of a snare to connect a flexible hose;

[0009] The positioning connecting cylinder is snapped into the inside of the rod head cap;

[0010] Furthermore, when the rod head cap is axially fitted onto the outside of the snare end, the positioning connecting sleeve is inserted into the inner wall of the snare end, and squeezes the snare end to open outward, thus forming an interference fit with the inner wall of the rod head cap.

[0011] In one optional embodiment, the inner bottom wall of the rod head cap is provided with a positioning groove, and the positioning connecting cylinder is adapted to be snapped into the positioning groove.

[0012] In one alternative embodiment, the positioning connecting tube includes a rigid connecting section and a flexible connecting section, the rigid connecting section extending toward the side of the rod head cap facing the snare.

[0013] The flexible connecting section passes through the positioning connecting cylinder and extends toward the side of the pole head cap away from the snare.

[0014] In one alternative implementation, the soft connector has a guide ramp on the side away from the hard connector.

[0015] In one optional embodiment, the outer wall of the flexible connection segment is provided with a plurality of limiting rings at equal intervals.

[0016] In one alternative embodiment, the rod head cap has a through-tube sleeve on the side away from the snare, a flexible connecting section extends inside the through-tube sleeve, and there is a gap between the outer wall of the flexible connecting section and the inner wall of the through-tube sleeve.

[0017] Secondly, embodiments of this disclosure also provide a snare, including the connection structure described above, and the snare includes a sleeve rod, with a receiving groove formed on the inner side of the end of the sleeve rod, the receiving groove corresponding to the rigid connection section.

[0018] In one optional embodiment, the outer wall of the sleeve end is provided with an annular groove, and the inner wall of the sleeve cap is provided with a positioning ring, which corresponds to the annular groove.

[0019] In one alternative embodiment, the end of the sleeve is inclined inward in a direction away from the sleeve.

[0020] In one alternative embodiment, a groove is provided on one side of the sleeve rod.

[0021] The beneficial effects of this utility model are that, by setting a rod head cap and a positioning connecting cylinder, and when the rod head cap is placed on the end of the snare, the positioning connecting cylinder squeezes the end of the snare outward, achieving an interference fit with the rod head cap. This allows for the assembly of three parts in one step, reducing assembly steps and improving convenience. Simultaneously, the interference fit ensures the connection stability between each pair of parts.

[0022] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained in the structures particularly pointed out in the description, claims, and drawings.

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 A perspective view of a snare provided in an embodiment of this disclosure;

[0026] Figure 2 A cross-sectional view of a snare provided in an embodiment of this disclosure;

[0027] Figure 3 for Figure 2 A magnified view of part A in the middle;

[0028] Figure 4 for Figure 2 A magnified view of part B in the middle section;

[0029] Figure 5 This is a schematic diagram of a connection structure provided in an embodiment of the present disclosure.

[0030] In the picture:

[0031] 1. Pole cap; 11. Positioning groove; 12. Through-tube sleeve; 13. Positioning ring;

[0032] 2. Positioning connecting cylinder; 21. Rigid connecting section; 22. Flexible connecting section; 23. Guide slope; 24. Limiting ring;

[0033] 3. Sleeve rod; 31. Annular groove; 32. Sliding groove; 4. Flexible hose. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] Research has revealed that at the head of the snare, the existing connection structure can only assemble multiple hardware and flexible components in pairs, resulting in numerous and complex assembly steps. Furthermore, a large assembly error in one part can affect the subsequent installation of other components.

[0036] Therefore, there is an urgent need to design a connection structure and its snare to solve the technical problems in related technologies where the snare head has many parts with inconsistent hardness and softness, and the connection structure cannot be installed conveniently and reliably.

[0037] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure below should be considered as the inventor's contribution to this disclosure.

[0038] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the embodiments and features described below can be combined with each other. Furthermore, in the accompanying drawings, the thickness of components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] Based on the above research, and referring to Figure 2 This disclosure provides a connection structure, including a rod head cap 1 and a positioning connecting cylinder 2. The rod head cap 1 is adapted to be installed at the end of a snare to connect a flexible hose 4. The positioning connecting cylinder 2 is snapped into the inner side of the rod head cap 1 and is adapted to cooperate with the rod head cap 1 to connect to the snare. Specifically, when the rod head cap 1 is axially fitted onto the outer side of the snare end, the positioning connecting cylinder 2 is inserted into the inner wall of the snare end, pressing the snare end outward and forming an interference fit with the inner wall of the rod head cap 1.

[0041] Reference Figure 4 In at least one embodiment, the positioning connecting cylinder 2 includes a rigid connecting section 21 and a flexible connecting section 22, with the rigid connecting section 21 extending toward the side of the rod head cap 1 facing the snare. Simultaneously, a positioning groove 11 is formed on the inner bottom wall of the rod head cap 1, the positioning groove 11 being identical in size and shape to the rigid connecting section 21, so that the entire positioning connecting cylinder 2 can be inserted into the positioning groove 11 through the rigid connecting section 21, thereby achieving a snap-fit ​​connection between the positioning connecting cylinder 2 and the rod head cap 1.

[0042] Reference Figure 4In at least one embodiment, the flexible connecting section 22 penetrates the positioning connecting tube 2 and extends toward the side of the clubhead cap 1 away from the snare. The flexible connecting section 22 is adapted to connect the hose 4 to the clubhead cap 1. To guide the hose 4 onto the flexible connecting section 22, the flexible connecting section 22 has a guide ramp 23 on the side away from the rigid connecting section 21. The shortest outer diameter of the guide ramp 23 is smaller than the inner diameter of the hose 4, so that the cartilage can be easily wrapped around the flexible connecting section 22 along the guide ramp 23.

[0043] Reference Figure 4 In at least one embodiment, a plurality of limiting rings 24 are provided at equal intervals on the outer wall of the flexible connector 22. The limiting rings 24 can increase the diameter of the flexible connector 22 so that after the hose 4 is sleeved on the flexible connector 22, the limiting rings 24 expand the hose 4 from the inside.

[0044] Reference Figure 5 In at least one embodiment, the rod cap 1 has a through-tube sleeve 12 on the side away from the snare, and a flexible connecting section 22 extends inside the through-tube sleeve 12, with a gap between the outer wall of the flexible connecting section 22 and the inner wall of the through-tube sleeve 12. The width of the gap between the flexible connecting section 22 and the inner wall of the through-tube sleeve 12 is consistent with the thickness of the flexible hose 4, so that the flexible hose 4 can be inserted into the through-tube sleeve 12 and fitted between the flexible connecting section 22 and the through-tube sleeve 12. An interference fit is achieved between the flexible connecting section 22, the flexible hose 4, and the through-tube sleeve 12 through a limiting ring 24, ensuring connection stability.

[0045] In addition, refer to Figure 1 This disclosure also provides a snare, including the connection structure described above, and the snare includes a sleeve rod 3, with a receiving groove formed on the inner side of the end of the sleeve rod 3, the receiving groove corresponding to the rigid connecting section 21. During the process of installing the rod head onto the sleeve rod 3, the portion of the rigid connecting section 21 protruding from the positioning groove 11 can be inserted into the receiving groove. The size of the receiving groove is slightly smaller than the outer diameter of the rigid connecting section 21.

[0046] Reference Figure 2 In at least one embodiment, the outer wall of the end of the sleeve 3 is provided with an annular groove 31, and the inner wall of the rod head cap 1 has a positioning ring 13, which corresponds to the annular groove 31. When the rod head is sleeved on the outside of the sleeve 3, the rigid connecting section 21 is inserted into the receiving groove and pushes the receiving groove outward, thus spreading the sleeve 3 outward so that the annular groove 31 is fully inserted into the positioning ring 13, thereby achieving an interference fit between the rigid connecting section 21, the sleeve 3, and the rod head cap 1.

[0047] Reference Figure 1 In at least one embodiment, a groove 32 is provided on one side of the sleeve rod 3 to ensure that the receiving groove can push the sleeve rod 3 outward rather than break it.

[0048] Reference Figure 2 and Figure 3 In at least one embodiment, the end of the sleeve 3 is inclined inward in a direction away from the sleeve 3. This allows the rod cap 1 to be easily fitted over the outside of the sleeve 3 before the rigid connection section 21 is inserted into the receiving groove.

[0049] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Based on the above-described ideal embodiments according to this utility model, and through the above description, those skilled in the art can make various changes and modifications without departing from the technical spirit of the disclosed embodiments. The technical scope of the embodiments of this disclosure is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A connection structure, characterized in that, include: A rod head cap (1) is adapted to be installed at the end of the snare to connect a hose (4). Positioning connecting cylinder (2), which is snapped into the inside of the rod head cap (1); Furthermore, when the rod head cap (1) is axially fitted onto the outside of the snare end, the positioning connecting cylinder (2) is inserted into the inner wall of the snare end and squeezes the snare end to open outward, and is interference-fitted with the inner wall of the rod head cap (1).

2. The connection structure as described in claim 1, characterized in that, The inner bottom wall of the rod cap (1) is provided with a positioning groove (11), and the positioning connecting cylinder (2) is adapted to be snapped into the positioning groove (11).

3. The connection structure as described in claim 1, characterized in that, The positioning connecting cylinder (2) includes a rigid connecting section (21) and a flexible connecting section (22), with the rigid connecting section (21) extending toward the side of the rod head cap (1) toward the snare. The flexible connecting section (22) penetrates the positioning connecting cylinder (2) and extends toward the side of the pole cap (1) away from the snare.

4. The connection structure as described in claim 3, characterized in that, The soft connecting section (22) has a guide slope (23) on the side away from the hard connecting section (21).

5. The connection structure as described in claim 3, characterized in that, The outer wall of the flexible connection section (22) is provided with several limiting rings (24) at equal intervals.

6. The connection structure as described in claim 5, characterized in that, The rod cap (1) has a through sleeve (12) on the side away from the snare, and a flexible connecting section (22) extends inside the through sleeve (12), with a gap between the outer wall of the flexible connecting section (22) and the inner wall of the through sleeve (12).

7. A snare device, characterized in that, Including the connection structure as described in any one of claims 1-6, and, The snare includes a snare rod (3), and a receiving groove is provided on the inner side of the end of the snare rod (3), which corresponds to the hard connection section (21).

8. The snare as described in claim 7, characterized in that, The outer wall of the end of the sleeve (3) is provided with an annular groove (31), and the inner wall of the rod cap (1) has a positioning ring (13), which corresponds to the annular groove (31).

9. The snare as described in claim 7, characterized in that, The end of the sleeve (3) is inclined inward in the direction away from the sleeve (3).

10. The snare as described in claim 7, characterized in that, A groove (32) is provided on one side of the sleeve (3).

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