KNOT TYING DEVICE

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a knotter.Background

[0002] In recent years, with the development of surgical devices and cardiac surgical techniques, a minimally invasive surgery has become a hotspot direction in the development of various surgical disciplines. The minimally invasive surgery has the characteristics of small incision and fast recovery. Meanwhile, a surgeon is required to realize simple and fast postoperative suture and knotting operation in a minimally invasive surgery environment. There are two clinical knotting methods, which are manual knotting and device knotting.

[0003] A related surgical knotter generally enables a clamping element to plastically deform through a punching and shearing clip so as to clamp a suture line, and then the suture line is cut by a cutting knife or a shearing knife. This cutting mode has the defects that when cutting with the cutting knife, firstly, the cutting knife is required to have relatively high sharpness, cutting edges of a cutting knife made of a general material are easy to damage, secondly, the suture line is required to be in a tight state, and when a blade is delivered, a loose suture line is not easy to cut; and when the shearing knife is used, although the defect that the loose suture line is not easy to cut by the blade is improved, the requirement for the sharpness of the cutting edges is reduced, a handle of the shearing knife is unfolded by an elastic element to keep a knife head open, and then the handle is extruded by a driving rod to close the shearing knife and then cut the suture line. The elastic element is unstable in operation during use due to the space limitation.

[0004] Documents CN106073836A, US2018 / 256159A1, US2018 / 177503A1, CN210019475U, CN107007329A, CN202892020U, CN205683123U, WO91 / 17712A1, EP1832236A2 and JP3165292B2 disclose some examples of knotting systems according to the prior art.Summary

[0005] The present invention is set out in the appended set of claims.

[0006] Some embodiments of the present invention are to provide a knotter in order to solve the problem that a shearing knife of a knotter in the related art is unstable when cutting a suture line.

[0007] By applying the technical solutions of the present invention, when knotting the suture line, the driving structure of the knotter drives the punching and shearing clip to punch a clamping element, thereby knotting the suture line, and at the same time, the driving structure drives the scissor to be in the shearing state, so that the scissor may cut the knotted suture line. The scissor is in the open state and the shearing state when driven by the driving structure, and the structure is stable and reliable. The technical solutions of the present invention effectively solve the problem that the shearing knife of the knotter in the related art is unstable when cutting the suture line.Brief Description of the Drawings

[0008] The drawings constituting a part of the application are used for providing further understanding of the present invention. Schematic embodiments of the present invention and description thereof are used for illustrating the present invention, rather than forming an improper limit to the present invention. In the drawings: Fig. 1 is a partial structure diagram of an embodiment of a knotter according to the present invention. Fig. 2 is a partial cross-section diagram of the knotter of Fig. 1. Fig. 3 is a structure diagram of scissor of the knotter of Fig. 1 in an open state. Fig. 4 is a structure diagram of the scissor of the knotter of Fig. 1 in a shearing state.

[0009] The above drawings include the following reference numbers: 10. driving structure; 11. scissor arm hole; 111. first scissor arm hole; 112. second scissor arm hole; 12. driving rod; 121. first side part; 122. second side part; 13. punching and shearing clip abutting pressure plate; 20. punching and shearing clip; 21. clip mouth; 30. scissor; 31. pivot shaft; 32. cutting edges; 33. first scissor arm; 34. second scissor arm; 40. sleeve; and 100. clamping element; 50. entrance hole; 51. outlet hole.Detailed Description of the Embodiments

[0010] It is to be noted that the embodiments of the present invention and the characteristics in the embodiments can be combined under the condition of no conflicts. The present invention is described below with reference to the drawings and the embodiments in detail.

[0011] As shown in Fig. 1 to Fig. 4, the knotter of the embodiments includes: a driving structure 10, a punching and shearing clip 20 and scissor 30. A clip mouth 21 of the punching and shearing clip 20 has a first position in an open state, and a second position in a punching state when driven by the driving structure 10. The scissor 30 has a first position in an open state when driven by the driving structure 10, and a second position in a shearing state when driven by the driving structure 10. The second position of the scissor 30 is synchronized with the second position of the punching and shearing clip 20.

[0012] Through application of the technical solutions of the embodiment, when knotting a suture line, the driving structure 10 of the knotter drives the punching and shearing clip 20 to punch the clamping element 100, thereby knotting the suture line, and at the same time, the driving structure 10 drives the scissor 30 to be in the shearing state, so that the scissor 30 may cut the knotted suture line. The scissor 30 is in the open state and the shearing state when driven by the driving structure 10, and the structure is stable and reliable. The technical solution of the embodiment effectively solves the problem that the shearing knife of the knotter in the related art is unstable when cutting the suture line.

[0013] As shown in Fig. 3, in the technical solution of the embodiment, a first end of the scissor 30 cooperates with the driving structure 10, and cutting edges 32 of the scissor 30 is located at a second end of the scissor 30. The scissor of the above structure is relatively low in processing cost and convenient to use. It is to be noted that the cutting edges 32 of the scissor 30 here are located at the second end of the scissor 30, the second end does not just indicate an end part and may indicate a partial area between the second end of the scissor 30 and the first end of the scissor 30, for example, the area from the pivot shaft 31 to the second end of the scissor 30 in Fig. 3 may be the cutting edges 32 entirely or may be the cutting edges 32 partially.

[0014] As shown in Fig. 3 and Fig. 4, in the technical solution of the embodiment, the scissor 30 include a first scissor arm 33 and a second scissor arm 34, middle parts of the first scissor arm 33 and the second scissor arm 34 are connected by a pivot shaft 31, and the driving structure 10 cooperates with a first end of the first scissor arm 33 and a first end of the second scissor arm 34. When the first end of the first scissor arm 33 is close to a second end of the second scissor arm 34, a second end of the first scissor arm 33 is close to the second scissor arm 34. The above structure is relatively low in processing cost, easy to mount and convenient to operate. Alternatively, the scissor 30 may be structured such that the first end of the first scissor arm 33 and the first end of the second scissor arm 34 are connected and form the pivot shaft 31.

[0015] As shown in Fig. 1 and Fig. 2, in the technical solution of the embodiment, the scissor 30 is located at one side of the punching and shearing clip 20 and arranged adjacent to the punching and shearing clip 20. In this way, the distance between the scissor 30 and the punching and shearing clip 20 is relatively short, that is to say, the reserved length of the suture line is relatively short. After the suture line is clamped by a clamping element 100 and knotted, the suture line reserved from the clamping element 100 is the distance from the punching and shearing clip 20 to the scissor 30. Particularly, the punching and shearing clip 20 is located at a left side, and the scissor 30 is located at the right side of the punching and shearing clip 20.

[0016] As shown in Fig. 1 and Fig. 2, in the technical solution of the embodiment, the driving structure 10 includes a driving rod 12, and a first end of the driving rod 12 cooperates with both the punching and shearing clip 20 and the scissor 30. The above structure is relatively low in processing cost. The punching and shearing clip 20 includes two clip arms which are oppositely arranged, and a first end of the driving rod 12 enables the punching and shearing clip 20 to punch the clamping element 100 through punching and shearing clip arms, thereby knotting. Particularly, a first side part 121 of the first end of the driving rod 12 has scissor arm holes 11 which cooperate with the scissor 30, and the first end of the scissor 30 is located in the scissor arm holes 11. The above structure is compact, and punching and shearing can be completed through the same driving rod 12. When the middle parts of the first scissor arm 33 and the second scissor arm 34 of the scissor 30 have the pivot shaft, the scissor arm holes 11 include a first scissor arm hole 111 and a second scissor arm hole 112, a first scissor arm 33 of the scissor 30 is located in the first scissor arm hole 111, and a second scissor arm 34 of the scissor 30 is located in the second scissor arm hole 112. A second side of the driving rod 12 and a first side of the driving rod 12 are of a stepped structure, and the second side of the driving rod 12 is shorter than the first side of the driving rod 12. The driving rod 12 is a solid rod, the first scissor arm hole 111 and the second scissor arm hole 112 are respectively formed in oblique holes which cooperate with the first scissor arm 33 and the second scissor arm 34, and the first scissor arm hole 111 and the second scissor arm hole 112 are through holes which penetrate through a side wall of the driving rod 12 from the first end of the driving rod 12.

[0017] As shown in Fig. 2, in the technical solution of the embodiment, a second side part 122 of the first end of the driving rod 12 has a punching and shearing clip abutting pressure plate 13 which cooperates with the punching and shearing clip 20. The above structure is simple, and the knotting effect is good. Particularly, a bulged structure is arranged on an inner wall of the punching and shearing clip 20, in this way, the clamping element 100 is better in clamping effect, and the suture line is not easy to run out. The clamping element 100 is a clamping nail. The suture line enters through the entrance hole 50 on the left side of the clamping element 100. The suture line runs out of the sleeve 40 through the outlet hole 51.

[0018] As shown in Fig. 1 and Fig. 2, in the technical solution of the embodiment, the knotter further includes a handle and a sleeve 40, a first end of the sleeve 40 is connected with the handle, the scissor 30 and the punching and shearing clip 20 are located at a second end of the sleeve 40, and the driving rod 12 is located in the sleeve 40. The second end of the driving rod 12 is connected with the handle. The above structure is convenient to operate and is compact in structure. The sleeve 40 can stretch into a body, in this way, the suture line reserved in the body is relatively short.

[0019] In the technical solutions (not shown in figure) of the embodiments, the knotter further includes a drive portion, and the drive portion is a manual drive portion arranged at the handle. The above structure is relatively low in processing cost. The manual drive portion is a trigger structure. Certainly, the drive portion may also be an automatic drive portion arranged at the handle. In this way, the knotter may be automatically driven, and the labor intensity of an operator is reduced. The automatic drive portion includes a motor, a hydraulic structure and the like. By operating a switch button arranged on the knotter, the motor runs or the hydraulic structure drives. Alternatively, an electric push rod structure may also be applied. It is to be noted that after primary knotting is completed, the driving structure 10 resets under the action of an elastic member or other power element in the handle, so that the scissor 30 recover from the shearing state to the open state and get ready for secondary knotting and line shearing operation.

Claims

1. A knotter, comprising: a driving structure (10); a punching and shearing clip (20), wherein a clip mouth (21) of the punching and shearing clip (20) having a first position in an open state, and a second position in a punching state when driven by the driving structure (10); and scissor (30) having a first position in an open state when driven by the driving structure (10), and a second position in a shearing state when driven by the driving structure (10); wherein the second position of the scissor (30) is synchronized with the second position of the punching and shearing clip (20), a first end of the scissor (30) cooperates with the driving structure (10), and cutting edges (32) of the scissor (30) being located at a second end of the scissor (30), the scissor (30) comprise a first scissor arm (33) and a second scissor arm (34), middle parts of the first scissor arm (33) and the second scissor arm (34) being connected by a pivot shaft (31), the driving structure (10) cooperating with a first end of the first scissor arm (33) and a first end of the second scissor arm (34), when the first end of the first scissor arm (33) is close to a second end of the second scissor arm (34), a second end of the first scissor arm (33) being close to the second scissor arm (34), the driving structure (10) comprises a driving rod (12), a first end of the driving rod (12) cooperating with the punching and shearing clip (20) and the scissor (30) respectively, characterized in that a first side part (121) of the first end of the driving rod (12) has scissor arm holes (11) which cooperate with the scissor (30), the first end of the scissor (30) being located in the scissor arm holes (11).

2. The knotter as claimed in claim 1, wherein the scissor arm holes (11) comprise a first scissor arm hole (111) and a second scissor arm hole (112), the first scissor arm (33) of the scissor (30) being located in the first scissor arm hole (111), and the second scissor arm (34) of the scissor (30) being located in the second scissor arm hole (112).

3. The knotter as claimed in claim 1 or 2, wherein a second side part (122) of the first end of the driving rod (12) has a punching and shearing clip abutting pressure plate (13) which cooperates with the punching and shearing clip (20).

4. The knotter as claimed in any one of the preceding claims, wherein the knotter further comprises a handle and a sleeve (40), a first end of the sleeve (40) being connected with the handle, the scissor (30) and the punching and shearing clip (20) being located at a second end of the sleeve (40), and the driving rod (12) being located in the sleeve (40).

5. The knotter as claimed in claim 4, wherein the knotter further comprises a drive portion, the drive portion being a manual drive portion arranged at the handle; or the drive portion being an automatic drive portion arranged at the handle.

6. The knotter as claimed in any one of claims 1 to 5, wherein the scissor (30) is located at one side of the punching and shearing clip (20) and is arranged adjacent to the punching and shearing clip (20).