Tightening and thread cutting mechanism for anorectal loop ligature device

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a tightening and cutting mechanism for an anorectal loop ligature device, which comprises a shell, a take-up component, a thread changing component, a cutting component and a cutting component connecting pipe are arranged in the shell, one end of the connecting pipe is connected with a loop ligature head, more than two threading holes are formed in the loop ligature head, a rotating part is rotatably arranged in the connecting pipe, and the rotating part is connected with the connecting pipe. The end, close to the loop ligature head, of the rotating piece is connected with a thread cutting assembly used for cutting off the elastic thread, the other end of the rotating piece is connected with a first driving assembly, and the threading hole corresponds to the thread cutting assembly. The take-up assembly comprises a winding roller rotationally installed in the shell, and the winding roller is connected with a second driving assembly. According to the tightening and cutting mechanism for the anorectal loop ligature device, by arranging the take-up assembly and the cutting assembly, manual tightening and cutting of an elastic thread can be replaced, the operation difficulty is lowered, operation can be completed by one person, and manpower is saved.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a tightening tangent mechanism for an anorectal ligation device. Background Art

[0002] Anorectal ligation is an important medical device used to treat diseases such as hemorrhoids. The main working principle of anorectal ligation is to form a tight ring ligation on the diseased tissue to block the blood flow of the diseased tissue, causing it to necrotize and eventually fall off. The advantages of using this device for treatment are simple operation and low chance of complications.

[0003] In the process of using the ligation device for ligation, after the elastic wire is put on the lesion tissue, it is necessary to tighten the elastic wire and then cut off the excess elastic wire. From the various solutions of anorectal ligation devices that have been disclosed in the prior art, most of them are implemented by manual operation. Since the elastic wire is elastic, the operator's movement amplitude is large during the process of tightening and cutting the elastic wire. This operation method is very easy to cause damage to the mucosa near the patient's hemorrhoids, and the operation is difficult. Therefore, it puts forward higher requirements on the operator's experience and proficiency. Sometimes, it even requires two people to cooperate at the same time to complete the operation. Therefore, it is necessary to improve the existing solutions of anorectal ligation devices to reduce the difficulty of cutting the elastic wire during the ligation operation. Summary of the invention

[0004] The object of the present invention is to provide a tightening and cutting mechanism for an anorectal ligation device to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above technical objectives, the technical solution of the present invention is: A tightening and cutting mechanism for an anorectal ligation device comprises a housing, a wire collection assembly and a wire changing assembly are arranged in the housing, the housing is connected to the cutting assembly, the cutting assembly comprises a connecting tube connected to the housing, one end of the connecting tube away from the housing is connected to a ligation head, the ligation head is provided with more than two threading holes, one end of the threading hole opens inside the connecting tube, a rotating member is rotatably arranged in the connecting tube, one end of the rotating member close to the ligation head is connected to a cutter for cutting an elastic line, and the other end is connected to a first driving assembly, the first driving assembly is mounted on the housing, and the threading hole corresponds to the cutter; The wire taking-up assembly includes a wire winding roller rotatably mounted in the housing, and the wire winding roller is connected to the second driving assembly; The line changing assembly includes a line hanging installation plate slidably mounted on the shell, on which more than two line hanging members are arranged, the line hanging installation plate is connected to the third driving assembly, and a line hooking member is arranged on the winding roller, and the line hooking member is located below the line hanging member.

[0006] As a further improvement, a first cavity for accommodating the diseased tissue is provided inside the ligation head, and a threading hole passes through the side wall of the ligation head from the front end to the rear end. One end of the ligation head is a suction end, and the other end is a connecting end for connecting to a connecting tube. The outer part of the end face of the connecting end is provided with a rotary cut surface, and the threading hole opens on the rotary cut surface, and the cutter slides in cooperation with the rotary cut surface.

[0007] As a further improvement, the cutter comprises a blade and a blade holder, one end of the blade holder is fixedly connected to the end wall of the rotating member, and the other end of the blade holder is fixedly connected to the blade; The blade is provided with a first end face and a second end face, the first end face is parallel to the rotary cutting surface and abuts against the rotary cutting surface, the second end face is fixedly connected to the tool holder, and the first end face and the second end face intersect to form a blade.

[0008] As a further improvement, the bottom surface of the cutter is an arc-shaped curved surface structure and is adapted to the rotary cutting surface, and the top surface of the cutter is an arc-shaped curved surface structure and is adapted to the inner side wall of the connecting pipe.

[0009] As a further improvement, the first drive assembly includes a first motor fixedly mounted on the shell, a first gear fixedly connected to the output shaft of the first motor, a second gear fixedly mounted on the outer wall of the rotating member close to one end of the shell, and the first gear meshes with the second gear.

[0010] As a further improvement, the rotating member is a metal tube, the rotating member and the tangent assembly are integrally formed, and the outer wall of the rotating member is rotatably matched with the inner wall of the support tube.

[0011] As a further improvement, the second drive assembly includes a first bevel gear fixedly connected to one end face of the winding roller, a second motor is fixedly provided inside the shell, a second bevel gear is fixedly connected to the output shaft of the second motor, and the first bevel gear is meshed with the second bevel gear.

[0012] As a further improvement, the shell is provided with a sliding groove, the wire hanging mounting plate is connected to the rack, the rack slides in the sliding groove, and the third driving assembly includes a third motor fixedly mounted on the shell, the third motor is connected to the third gear, and the third gear is meshed with the rack.

[0013] As a further improvement, an elastic line is passed through each threading hole, one end of the elastic line is provided with a slipknot, the slipknot is sleeved on the outer surface of the tying head, the other end of the elastic line is provided with a hook knot, the hook knot is hung on the thread hanging piece, and the elastic line passes through the threading hole and the inside of the rotating piece in turn.

[0014] As a further improvement, an annular winding groove extending in a radial direction is provided on the circumferential side surface of the winding roller, and the wire hooking member is arranged in the winding groove.

[0015] Due to the adoption of the above technical solution, the beneficial technical effects of the present invention are: The invention provides a tightening and cutting mechanism for an anorectal ligation device. By providing a wire collection component and a wire cutting component, the mechanism can replace manual tightening and cutting of elastic wires, thereby reducing the difficulty of operation, and can be completed by a single person, thus saving manpower.

[0016] By providing a line-changing assembly, multiple elastic lines can be replaced continuously without replacing the ligation device, and ligation operations can be performed on multiple lesion tissues, thus saving medical costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of a line changing assembly of the present invention; Figure 3 is a partial cross-sectional view of the line changing assembly of the present invention; Figure 4 is a schematic diagram of a third drive assembly of the present invention; Figure 5 It is a structural schematic diagram of the tying head of the present invention; Figure 6 It is a schematic diagram of the assembly of the tying head and the cutting assembly of the present invention; Figure 7 It is a schematic structural diagram of a cutter of the present invention.

[0018] Wherein: 1-housing, 2-receiving assembly, 201-winding roller, 2011-winding groove, 202-hook wire part, 3-wire changing assembly, 301-hanging wire mounting plate, 302-hanging wire part, 4-cutting assembly, 401-connecting pipe, 402-tying head, 4021-threading hole, 4022-first cavity, 4023-suction end, 4024-connecting end, 4025-rotary cutting surface, 403-rotating part, 5-cutter, 501-blade, 5011-first end face, 5012-second end face, 502-tool holder, 6-first drive assembly, 601-first motor, 602-first gear, 603-second gear, 7-second drive assembly, 701-first bevel gear, 702-second motor, 703-second bevel gear, 8-elastic line, 9-third drive assembly, 901-rack, 902-third motor, 903-third gear. DETAILED DESCRIPTION

[0019] The technical scheme of the present invention will be clearly and completely described below in conjunction with specific embodiments, but it will be appreciated by those skilled in the art that the following described embodiments are part of embodiments of the present invention, rather than all embodiments, and are only used to illustrate the present invention, and should not be considered as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work, all belong to the scope of protection of the present invention. If specific conditions are not indicated in the embodiments, they are carried out according to normal conditions or conditions recommended by the manufacturer. If the manufacturer is not indicated in the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0020] like Figure 1-7 As shown, a tightening and cutting mechanism for an anorectal ligation device comprises a housing 1, a wire taking-up assembly 2 and a wire changing assembly 3 are arranged in the housing 1, the housing 1 is connected to a cutting assembly 4, the cutting assembly 4 comprises a connecting tube 401 connected to the housing 1, one end of the connecting tube 401 away from the housing 1 is connected to a ligation head 402, the ligation head 402 is provided with more than two threading holes 4021, one end of the threading hole 4021 is opened in the connecting tube 401, a rotating member 403 is rotatably arranged in the connecting tube 401, one end of the rotating member 403 close to the ligation head 402 is connected to a cutter 5 for cutting the elastic line 8, and the other end is connected to a first driving assembly 6, the first driving assembly 6 is mounted on the housing 1, and the threading hole 4021 corresponds to the cutter 5; The wire taking-up assembly 2 comprises a wire winding roller 201 rotatably mounted in the housing 1, and the wire winding roller 201 is connected to the second driving assembly 7; The line changing assembly 3 includes a line hanging mounting plate 301 slidably mounted on the shell 1, and more than two line hanging parts 302 are arranged on the line hanging mounting plate 301. The line hanging mounting plate 301 is connected to the third driving assembly 9, and a line hooking part 202 is arranged on the winding roller 201, and the line hooking part 202 is located below the line hanging part 302.

[0021] When in use, one end of the elastic line 8 is knotted and hung on the hanging line member 302, and the other end is knotted and hung on the outer surface of the ligation head 402. The second driving assembly 7 drives the winding roller 201 and the hooking line member 202 to rotate. The hooking line member 202 hooks the knot on the hanging line member 302 during the rotation process. One end of the elastic line 8 rotates with the winding roller 201 and is wound around the winding roller 201 circle by circle. The other end of the elastic line 8 slides to the root of the lesion tissue, and then the elastic line 8 is gradually tightened. The cutter 5 is used to cut the tightened elastic line 8. After the elastic line 8 is cut, the third driving assembly 9 drives the hanging line installation plate 301 to move. When different hanging line members 302 arrive above the hooking line member 202 in turn, the above steps are repeated. The hooking line member 202 hooks the knots of different elastic lines 8 in turn, thereby achieving the purpose of replacing the elastic line 8 for multiple times and performing ligation operations on different lesion tissues.

[0022] In this embodiment, a first cavity 4022 for accommodating diseased tissues runs through the inside of the ligating head 402. The threading hole 4021 runs through the side wall of the ligating head 402 from the front end to the rear end of the ligating head 402. One end of the ligating head 402 is the suction end 4023, and the other end is the connection end 4024 for connecting with the connecting pipe 401. An angled cutting surface 4025 is provided on the outer part of the end face of the connection end 4024. The threading hole 4021 opens on the angled cutting surface 4025, and the cutting knife 5 is slidably engaged with the angled cutting surface 4025.

[0023] When this embodiment is in use, the ligating head 402 is aligned with and contacts the diseased tissue. The first cavity 4022 is connected to a negative pressure device through a trachea so that a negative pressure is generated in the first cavity 4022, and the diseased tissue is sucked into the first cavity 4022. The threading hole 4021 and the first cavity 4022 are independently arranged to prevent gas from entering and leaving the first cavity 4022 through the threading hole 4021, thereby reducing the sealing effect of the first cavity 4022.

[0024] In this embodiment, the cutting knife 5 includes a blade 501 and a tool holder 502. One end of the tool holder 502 is fixedly connected to the end wall of the rotating member 403, and the other end of the tool holder 502 is fixedly connected to the blade 501. The blade 501 is provided with a first end face 5011 and a second end face 5012. The first end face 5011 is parallel to the angled cutting surface 4025 and abuts against the angled cutting surface 4025. The second end face 5012 is fixedly connected to the tool holder 502. The first end face 5011 and the second end face 5012 intersect to form a cutting edge.

[0025] The angled cutting surface 4025 is used to define the axial position of the blade 501 and provide a force-bearing support for the blade 501, enabling the blade 501 to more easily cut off the elastic cord 8.

[0026] In this embodiment, the bottom surface of the cutting knife 5 is an arc-shaped curved surface structure and is adapted to the angled cutting surface 4025. The top surface of the cutting knife 5 is an arc-shaped curved surface structure and is adapted to the inner side wall of the connecting pipe 401. The arc-shaped curved surface structure enables the cutting knife 5 to rotate more smoothly, avoiding jamming and affecting the cutting effect.

[0027] In this embodiment, the first driving component 6 includes a first motor 601 fixedly arranged on the housing 1. A first gear 602 is fixedly connected to the output shaft of the first motor 601. A second gear 603 is fixedly sleeved on the outer side wall of the rotating member 403 near the outer shell. The first gear 602 is meshed with the second gear 603. The first motor 601 drives the first gear 602 to rotate, and the first gear 602 drives the second gear 603 and the rotating member 403 to rotate, thereby driving the cutting knife 5 to rotate.

[0028] In this embodiment, the rotating member 403 is a metal tube, the rotating member 403 and the cutter 5 are integrally formed, and the outer wall of the rotating member 403 is rotatably matched with the inner wall of the connecting tube 401. The rotating member 403 made of metal has good mechanical properties and is not prone to bending and deformation during cutting of the elastic wire 8.

[0029] In this embodiment, the second driving assembly 7 includes a first bevel gear 701 fixedly connected to one end face of the winding roller 201, a second motor 702 is fixedly provided inside the housing 1, a second bevel gear 703 is fixedly connected to the output shaft of the second motor 702, and the first bevel gear 701 is meshed with the second bevel gear 703. The second motor 702 rotates to drive the second bevel gear 703 to rotate, and the second bevel gear 703 rotates to drive the first bevel gear 701 and the winding roller 201 to rotate.

[0030] In this embodiment, the housing 1 is provided with a sliding groove, the wire hanging installation plate 301 is connected to the rack 901, the rack 901 slides in the sliding groove, and the third driving assembly 9 includes a third motor 902 fixedly mounted on the housing 1, the third motor 902 is connected to the third gear 903, and the third gear 903 is meshed with the rack 901. The third motor 902 rotates to drive the third gear 903 to rotate, and the third gear 903 drives the rack 901 and the wire hanging member 302 to move along the sliding groove.

[0031] In this embodiment, an elastic line 8 is passed through each threading hole 4021, one end of the elastic line 8 is provided with a slipknot, the slipknot is sleeved on the outer surface of the ligation head 402, the other end of the elastic line 8 is provided with a hook knot, the hook knot is hung on the line hanging member 302, and the elastic line 8 passes through the threading hole 4021 and the inside of the rotating member 403 in sequence. The elastic line 8 is arranged inside the rotating member 403, which can effectively reduce the volume of the anorectal ligation device, and the operation and use are more flexible.

[0032] In this embodiment, a circular winding groove 2011 extending in the radial direction is provided on the circumferential side of the winding roller 201, and the wire hooking member 202 is disposed in the winding groove 2011. The winding groove 2011 is used to limit the position of the elastic wire 8 to prevent the elastic wire 8 from slipping off the winding roller 201.

[0033] In use of this embodiment, the ligation head 402 is aligned with and contacts the lesion tissue, and the negative pressure device is activated to form a negative pressure in the first cavity 4022, and the lesion tissue is sucked into the first cavity 4022. The second motor 702 rotates to drive the second bevel gear 703 to rotate, the second bevel gear 703 rotates to drive the first bevel gear 701 and the wire winding roller 201 to rotate, and the elastic wire 8 is wound around the surface of the wire winding roller 201 turn by turn, thereby tightening the elastic wire 8. The first motor 601 drives the cutter 5 to rotate and cut the elastic wire 8. The third motor 902 rotates to drive the third gear 903 to rotate, the third gear 903 drives the rack 901 and the wire hanging mounting plate 301 to move. When different wire hanging members 302 reach above the wire hooking member 202 in sequence, the wire hooking member 202 hooks the knots of different elastic wires 8 in sequence, thereby achieving the purpose of continuously replacing the elastic wire 8 multiple times and performing ligation operations on different lesion tissues.

[0034] The specific embodiments of the present invention described above do not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A tightening and cutting mechanism for an anorectal ligation device, comprising a housing, characterized in that: A wire taking-up assembly and a wire changing assembly are provided in the housing, the housing is connected to a wire cutting assembly, the wire cutting assembly includes a connecting tube connected to the housing, one end of the connecting tube away from the housing is connected to a sleeve tying head, the sleeve tying head is provided with more than two threading holes, one end of the threading hole opens inside the connecting tube, a rotating member is rotatably provided inside the connecting tube, one end of the rotating member close to the sleeve tying head is connected to a cutter for cutting the elastic line, and the other end is connected to a first driving assembly, the first driving assembly is mounted on the housing, and the threading hole corresponds to the cutter; The wire take-up assembly includes a wire winding roller rotatably mounted in the housing, and the wire winding roller is connected to the second driving assembly; The line changing assembly includes a line hanging installation plate slidably mounted on the shell, the line hanging installation plate is provided with more than two line hanging parts, the line hanging installation plate is connected to the third driving assembly, the winding roller is provided with a line hooking part, and the line hooking part is located below the line hanging part.

2. The tightening and cutting mechanism for anorectal ligation device according to claim 1, characterized in that: A first cavity for accommodating diseased tissue is provided inside the ligature head, and the threading hole passes through the side wall of the ligature head from the front end to the rear end of the ligature head. One end of the ligature head is a suction end, and the other end is a connecting end for connecting to a connecting pipe. The outer part of the end surface of the connecting end is provided with a rotary cutting surface, the threading hole opens on the rotary cutting surface, and the cutter slidably cooperates with the rotary cutting surface.

3. The tightening and cutting mechanism for anorectal ligation device according to claim 1, characterized in that: The cutting assembly comprises a blade and a blade holder, one end of the blade holder is fixedly connected to the end wall of the rotating member, and the other end of the blade holder is fixedly connected to the blade; The blade is provided with a first end face and a second end face, the first end face is parallel to the rotary cutting surface and abuts against the rotary cutting surface, the second end face is fixedly connected to the tool holder, and the first end face and the second end face intersect to form a blade.

4. The tightening and cutting mechanism for anorectal ligation device according to claim 1, characterized in that: The bottom surface of the cutter is an arc-shaped curved surface structure and is matched with the rotary cutting surface, and the top surface of the cutter is an arc-shaped curved surface structure and is matched with the inner side wall of the connecting pipe.

5. The tightening and cutting mechanism for anorectal ligation device according to claim 1, characterized in that: The first driving assembly includes a first motor fixedly mounted on the housing, a first gear fixedly connected to the output shaft of the first motor, a second gear fixedly sleeved on the outer side wall of the rotating member at one end close to the housing, and the first gear meshes with the second gear.

6. The tightening and cutting mechanism for anorectal ligation device according to claim 1, characterized in that: The rotating member is a metal tube, the rotating member and the cutter are integrally formed, and the outer wall of the rotating member is rotatably matched with the inner wall of the support tube.

7. The tightening and cutting mechanism for anorectal ligation device according to claim 1, characterized in that: The second driving assembly includes a first bevel gear fixedly connected to one end surface of the winding roller, a second motor is fixedly provided inside the housing, a second bevel gear is fixedly connected to the output shaft of the second motor, and the first bevel gear is meshed with the second bevel gear.

8. The tightening and cutting mechanism for anorectal ligation device according to claim 1, characterized in that: The shell is provided with a sliding groove, the wire hanging installation plate is connected to the rack, the rack slides in the sliding groove, and the third driving component includes a third motor fixedly mounted on the shell, the third motor is connected to the third gear, and the third gear is meshed with the rack.

9. The tightening and cutting mechanism for anorectal ligation device according to claim 1, characterized in that: An elastic line is passed through each threading hole, one end of the elastic line is provided with a slipknot, the slipknot is sleeved on the outer surface of the tying head, the other end of the elastic line is provided with a hook knot, the hook knot is hung on the thread hanging member, and the elastic line passes through the threading hole and the inside of the rotating member in sequence.

10. The tightening and cutting mechanism for anorectal ligation device according to claim 1, characterized in that: An annular winding groove extending in a radial direction is provided on the circumferential side surface of the winding roller, and the wire hooking member is arranged in the winding groove.

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