Electric motor-powered ligation device loop cutter linkage

Abstract

The application provides a kind of electric ligation device ring cutter linkage device, including handle, sleeve, ring and cutter installed on the shell of ligation device;Sleeve is used to absorb hemorrhoid tissue;Ring is sleeved in the suction port position of sleeve, and connection line is arranged on the ring and connected with the shell through the connection line;Handle is hinged with the shell, and through one-shot of handle, ring is driven to separate from sleeve, and cutter is driven to move, and the connection line on the ring separated from sleeve is cut off. Through the same direction rotation of handle, ring can be sequentially driven to separate from sleeve, and cutter is driven to move and cut off the connection line, so that medical staff does not need to prepare additional scissors and other external tools to cut off the connection line, which greatly simplifies the operation process of ring and ligation device main body separation.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a banding device for treating hemorrhoids, specifically an electric banding device with a loop cutter linkage. Background Technology

[0002] Hemorrhoids, a common anorectal disease, can be treated in various ways, among which banding therapy is widely used due to its simplicity and effectiveness. The electric banding device, an important tool for implementing banding therapy, typically consists of a cannula and a ring. The ring is fitted onto the suction end of the cannula and connected to the main body of the banding device via a connecting wire. During operation, the cannula first uses negative pressure to suction the hemorrhoid tissue, and then the ring automatically fits around the base of the hemorrhoid tissue, thus achieving banding.

[0003] However, existing electric ligators have significant shortcomings in their method of separating the loop from the ligator body. Specifically, the current common method involves cutting the connecting suture with scissors or other external tools after the loop has been applied, thus detaching the loop from the ligator body. While this method achieves separation, the procedure is relatively complex, requiring medical staff to have additional tools such as scissors and to maintain a high degree of focus and accuracy during the operation to avoid unnecessary damage to surrounding tissues. Furthermore, cutting the connecting suture with scissors may increase surgical time, reduce surgical efficiency, and also cause inconvenience and pain for the patient.

[0004] Therefore, given the shortcomings of existing electric ligation devices in the way the loop separates from the ligation device body, it is necessary to propose a new technical solution to simplify the operation process, improve surgical efficiency, and reduce trauma to patients. Summary of the Invention

[0005] To address the technical problems in the background art, the present invention discloses an electric banding device with a banding cutter linkage.

[0006] This invention provides an electric ligator loop cutter linkage device, comprising a handle, sleeve, loop and cutter mounted on the housing of the ligator;

[0007] The cannula is used to absorb hemorrhoid tissue;

[0008] The collar is fitted onto the suction port of the sleeve, and a connecting line is provided on the collar, which is connected to the shell through the connecting line;

[0009] A push tube is sleeved on the outside of the sleeve;

[0010] The handle is hinged to the housing and is used to drive the push tube to move;

[0011] By firing the handle once, the push tube pushes the ferrule away from the sleeve, and drives the cutter to move, cutting the connecting wire on the ferrule that has detached from the sleeve.

[0012] The beneficial effects of the above setup are: 1. A single firing of the handle completes the actions of driving the collar to detach from the cannula and driving the cutter to cut the connecting wire on the collar after it has detached from the cannula, eliminating the need for medical personnel to prepare external tools such as scissors to cut the connecting wire, greatly simplifying the operation process of detaching the collar from the main body of the ligator; 2. It avoids the relatively time-consuming step of cutting the connecting wire with scissors, reducing the operation time and making the entire ligation surgery more efficient, which helps to improve the utilization efficiency of medical resources; 3. The simplified operation process and the absence of additional tools reduce the risk of unnecessary damage to surrounding tissues that may be caused by using tools such as scissors during the operation, reducing the pain and trauma to the patient and facilitating postoperative recovery.

[0013] Furthermore, a mounting section is provided on the upper side of the push tube, and the cutter is located within the mounting section. The advantages of this design are: 1. The cutter is hidden within the mounting section, preventing direct contact with external objects and thus preventing cuts to the human body or damage to other items; 2. When the push tube moves, the cutter moves accordingly, ensuring that the cutting edge is always aligned with the connecting line; 3. The cutter's mounting structure also prevents instability in the movement of the cutter and push tube, which could lead to the connecting line being severed by the cutter before the sleeve detaches from the sleeve.

[0014] To improve the stability of the cutter's movement, a further design feature is provided: a limiting groove is provided inside the mounting section, and the cutter is inserted into the limiting groove.

[0015] Since there is a gap between the initial position of the cutter and the connecting line, if the cutter adopts a rigid structure, it needs to be set at an angle to the connecting line. Such a setting requires increasing the volume of the mounting part, which not only makes the structure of the sling more complex but also increases the cost. Based on this, a further improvement is made: the end of the limiting groove near the connecting line is an arc-shaped groove, which faces the connecting line directly; the cutter is elastic.

[0016] To improve the stability of the cutter cutting the connecting wire, a further design is made: the connecting wire passes through the wall of the arc-shaped groove.

[0017] Since the handle is the only driving component, to ensure that the ferrule disengages from the sleeve and the cutter cuts the line sequentially, a further design is implemented: a driving sleeve is also fitted onto the sleeve; the handle drives the push tube to move via the driving sleeve; under the action of the power transmission assembly, the driving sleeve first drives the push tube to move, and then drives the cutter to move. The power transmission assembly specifically includes: a lifting block, with a first inclined surface that contacts the driving sleeve and a second inclined surface that contacts the push tube; the first and second inclined surfaces are parallel and both form an acute angle with the sleeve; and a push block, fixed to the rear end of the cutter, which extends from the mounting part and faces the driving sleeve.

[0018] Furthermore, the push tube is provided with an axially extending groove; the drive sleeve is provided with a slider that engages with the groove. The slider engages with the groove, which not only guides the movement of the push tube and the drive sleeve, but also allows the slider to drive the push tube to reset.

[0019] The cutter is elastic, so under its restoring force, it will adhere tightly to the upper end of the curved groove. This can easily cause the cutter to cut the upper wall of the groove. Therefore, a further improvement is made: the cutting edge of the cutter forms an obtuse angle with its upper end face. This design allows the cutting edge to detach from the upper wall of the curved groove, preventing cuts.

[0020] The beneficial effects of this invention are: 1. A single firing of the handle completes the actions of driving the collar to detach from the cannula and driving the cutter to move and cut the connecting wire on the collar after it has detached from the cannula, eliminating the need for medical personnel to prepare external tools such as scissors to cut the connecting wire, greatly simplifying the operation process of detaching the collar from the main body of the ligator; 2. It avoids the relatively time-consuming step of cutting the connecting wire with scissors, reducing the operation time and making the entire ligation surgery more efficient, which helps to improve the utilization efficiency of medical resources; 3. The simplified operation process and the absence of additional tools reduce the risk of unnecessary damage to surrounding tissues that may be caused by using tools such as scissors during the operation, reducing the pain and trauma to the patient and facilitating postoperative recovery. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the structure of the present invention, in which part of the shell is hidden;

[0023] Figure 2 This is a front view of the invention, in which part of the housing is hidden;

[0024] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0025] Figure 4 yes Figure 2 Enlarged view of point B in the middle;

[0026] Figure 5 This is a structural schematic diagram from another perspective of the present invention, in which the housing is hidden;

[0027] Figure 6 This is a schematic diagram of the installation structure of the push tube, lifting block, and drive sleeve;

[0028] Figure 7 yes Figure 6 Exploded view;

[0029] Figure 8 This is a schematic diagram of the drive sleeve;

[0030] Figure 9 This is the right view of the drive sleeve;

[0031] Figure 10 This is a schematic diagram of the installation structure of the cutter and pusher;

[0032] Figure 11 yes Figure 10 Enlarged view of point C in the middle;

[0033] In the diagram: 1. Housing; 2. Handle; 3. Sleeve; 4. Ring; 5. Cutter; 6. Handle; 7. Push tube; 8. Drive sleeve; 9. Lifting block; 10. Negative pressure pump; 11. First spring; 12. Second spring; 41. Connecting wire; 51. Push block; 52. Weight reduction hole; 53. Fixing hole; 54. Fixing block; 71. Mounting part; 72. Limiting groove; 73. Arc groove; 74. Slide groove; 75. First limiting part; 76. Slot; 77. Force-bearing inclined surface; 81. Sliding head; 82. Drive block; 83. Limiting plate; 84. Slot; 85. Support surface; 86. Drive inclined surface; 87. Drive groove; 91. First inclined surface; 92. Second inclined surface; 101. Second limiting part. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0035] like Figure 1 and Figure 2 As shown, the present invention discloses an electric ligator loop cutter linkage device, including a handle 2, a sleeve 3, a loop 4, a push tube 7, a cutter 5 and a drive sleeve 8 installed on the housing 1 of the ligator.

[0036] by Figure 2For reference, a handle 6 extends downward from the right end of the housing 1 for gripping. A handle 2 is located on the left side of the handle 6, with its middle section hinged to the housing 1. The lower side of the hinge point is for gripping, while the upper end of the hinge point is the drive end, used to move the drive sleeve 8. A torsion spring is provided at the hinge point of the handle 2 for automatic return.

[0037] The sleeve 3 is horizontally positioned on the upper part of the housing 1. A negative pressure pump 10 is installed inside the handle 6, and its inlet is connected to the sleeve 3, so that negative pressure is generated inside the sleeve 3 to adsorb hemorrhoid tissue.

[0038] The collar 4 is fitted onto the suction port on the left end of the sleeve 3, and the upper end of the collar 4 extends vertically to the right with a connecting line 41 that is fixedly connected to the housing 1.

[0039] A horizontally arranged push tube 7, which is fitted onto the sleeve 3, is provided on the left side of the housing 1. The right end of the push tube 7 is inserted into the housing 1 to guide movement. The upper end of the push tube 7 is connected to a horizontally integrated, injection-molded mounting part 71, and the cutter 5 is located within the mounting part 71. The advantages of this arrangement are: 1. The cutter 5 is hidden within the mounting part 71, preventing the cutter 5 from directly contacting external objects, thus preventing the cutter 5 from cutting the human body or tearing other items and causing them to be scrapped; 2. When the push tube 7 moves, the cutter 5 will move accordingly, so that the cutting edge of the cutter 5 can always be aligned with the connecting line 41; 3. The mounting structure of the cutter 5 also avoids the instability of the movement of the cutter 5 and the push tube 7, which would cause the connecting line 41 to be cut off by the cutter 5 before the collar 4 is detached from the sleeve 3.

[0040] The right end of the mounting part 71 is provided with an upwardly protruding first limiting part 75, and the inner hole at the left end of the housing 1 leads out a downwardly protruding second limiting part 101. The push tube 7 moves to the left and is limited by the first limiting part 75 abutting against the second limiting part 101.

[0041] A horizontally arranged limiting groove 72 is provided within the mounting section 71. An arc-shaped groove 73 is connected to the left end of the limiting groove 72, extending downwards and directly opposite the connecting line 41. The cutter 5 is made of a spring and is elastic, inserted into the limiting groove 72. This arrangement allows the cutter 5 to deform; when the cutter 5 moves into the arc-shaped groove 73, it bends and stably cuts the connecting line 41 along the arc-shaped groove 73. For example... Figure 10 As shown, a weight-reducing hole 52 is provided at the left end of the cutter 5. The weight-reducing hole 52 is not only used to reduce the weight of the cutter 5 and save materials, but also to reduce the strength of the left end of the cutter 5, making the cutter 5 easier to deform.

[0042] Because the cutter 5 is elastic, under its restoring force, it will adhere tightly to the upper end of the arc-shaped groove 73. This makes it easy for the cutter 5 to cut the upper wall of the arc-shaped groove 73, and it can also easily insert itself into the groove wall, making it difficult to move. Therefore... Figure 3 As shown, the cutting edge of the cutter 5 forms an obtuse angle with the upper end face of the cutter 5. With this setting, the cutting edge is separated from the upper groove wall of the arc groove 73, so as not to cause cuts to the upper groove wall of the arc groove 73, and can also move stably under the guidance of the arc groove 73.

[0043] like Figure 3 As shown, a slot 76 is provided at the connection between the mounting part 71 and the push rod, and the connecting wire 41 is inserted into the slot 76. The arc-shaped groove 73 extends to the push tube 7, so that there is a gap between the lower end of the slot 76 and the arc-shaped groove 73. With this configuration, when the cutter 5 cuts, its cutting edge moves to the area where the arc-shaped groove 73 is located inside the push rod, which can stably cut the connecting wire 41.

[0044] like Figure 11 As shown, the right end of the cutter 5 has a through-hole 53, and the left end of the pusher 51 has a fixing block 54 that engages with the fixing hole 53. Figure 4 As shown, the left end of the push block 51 is connected to the mounting part 71 via the first spring 11 for resetting the cutter 5; the right end of the push block 51 extends to the right through the mounting part 71.

[0045] like Figure 8 and Figure 9 As shown, the drive sleeve 8 includes a U-shaped drive block 82 with its opening facing downwards. The drive block 82 faces the push block 51 and is used to drive the push block 51 to move. The lower end of each drive block 82 is connected to a horizontally arranged limiting plate 83. The limiting plate 83 extends to the left and right sides of the drive block 82, and symmetrical, concentrically arranged, slightly curved slots 84 are provided on their opposite sides. The groove walls of the slots 84 fit against the outer wall of the sleeve 3, achieving both installation and movement limitation of the drive sleeve 8. A recessed drive groove 87 is provided on the outer side of the limiting plate 83. The upper end of the handle 2 is engaged in the drive groove 87 to push the drive sleeve 8 to move left and right.

[0046] The push tube 7 is provided with two symmetrical, axially extending slide grooves 74; the inner side of the left end of the limiting plate 83 is provided with a slide head 81 that engages with the slide grooves 74. The slide head 81 engages with the slide grooves 74, which not only realizes the movement and guidance of the push tube 7 and the drive sleeve 8, but also drives the push tube 7 to reset.

[0047] like Figure 6-8 As shown, one of the limiting plates 83 has an upward and leftward through-hole at its left end, forming a support surface 85 and a driving inclined surface 86 that are connected at the notch and form an obtuse angle. The support surface 85 is horizontal, and the driving inclined surface 86 forms an acute angle with the axial direction of the sleeve 3. The right end of the mounting part 71 has a force-bearing inclined surface 77 parallel to the driving inclined surface 86. (As shown...) Figure 5As shown, a lifting block 9 is installed on the housing 1. Its top is connected to the housing 1 via a second spring 12 for automatic descent and reset. Its lower end abuts against a support surface 85 for limiting the descent of the lifting block 9. The lifting block 9 has a first inclined surface 91 that engages with the driving inclined surface 86 and a second inclined surface 92 that engages with the force-bearing inclined surface 77. With this configuration, when the driving sleeve 8 moves to the left, the driving inclined surface 86 applies a pushing force to the first inclined surface 91, pushing the lifting block 9 upward. During the upward movement of the lifting block 9, the second inclined surface 92 applies a pushing force to the force-bearing inclined surface 77, thereby pushing the push tube 7 to the left. The push tube 7 applies a pushing force to the collar 4, causing the sleeve 3 to move to the left and disengage from the sleeve 3. Under the action of the aforementioned inclined plane, the moving distance of the drive sleeve 8 is greater than the moving distance of the push tube 7. Therefore, the slope of the aforementioned inclined plane is configured as follows: when the collar 4 is disengaged from the sleeve 3, the drive block 82 abuts against the push block 51 and begins to apply a pushing force to the cutter 5, so that the cutter 5 cuts the connecting line 41 only after the collar 4 is disengaged from the sleeve 3.

[0048] Compared with the prior art, the advantages of this embodiment are: 1. The operation of driving the collar 4 to disengage from the cannula 3 and driving the cutter 5 to cut the connecting line 41 on the collar 4 after it has disengaged from the cannula 3 can be completed with a single firing of the handle 2. Medical staff do not need to prepare additional external tools such as scissors to cut the connecting line 41, which greatly simplifies the operation process of disengaging the collar 4 from the main body of the ligator; 2. It avoids the relatively time-consuming step of cutting the connecting line 41 with scissors, reduces the operation time, makes the entire ligation operation more efficient, and helps to improve the utilization efficiency of medical resources; 3. The operation process is simplified and does not require additional tools, which reduces the risk of unnecessary damage to surrounding tissues that may be caused by the use of tools such as scissors during the operation, reduces the pain and trauma caused to patients by the surgery, and is conducive to the postoperative recovery of patients.

[0049] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A linkage device for an electric ligator loop cutter, characterized in that: Includes a handle (2), a sleeve (3), a collar (4), and a cutter (5) mounted on the housing (1) of the ligator; The sleeve (3) is used to absorb hemorrhoid tissue; The collar (4) is fitted onto the suction port of the sleeve (3), and a connecting line (41) is provided on the collar (4) and connected to the shell (1) through the connecting line (41). A push tube (7) is sleeved on the outside of the sleeve (3); The handle (2) is hinged to the housing (1) and is used to drive the push tube (7) to move; The push tube (7) is provided with a mounting part (71) on its upper side, and the cutter (5) is provided in the mounting part (71); When the push tube (7) moves, the cutter (5) will move accordingly; A drive sleeve (8) is also sleeved on the sleeve (3); The handle (2) drives the push tube (7) to move via the drive sleeve (8); Under the action of the power transmission component, the drive sleeve (8) first drives the push tube (7) to move, and then drives the cutter (5) to move. The power transmission component includes: The lifting block (9) is provided with a first inclined surface (91) that contacts the drive sleeve (8) and a second inclined surface (92) that contacts the push tube (7). Push block (51) is fixedly connected to the rear end of the cutter (5); push block (51) protrudes from the mounting part (71) and faces the drive sleeve (8). The drive sleeve (8) includes a drive block (82) facing the push block (51) and used to drive the push block (51) to move; When the drive sleeve (8) is driven, it pushes the lifting block (9) to rise; during the rising process of the lifting block (9), it pushes the push tube (7) to move axially, and the push tube (7) applies a thrust to the collar (4), so that the collar (4) disengages from the sleeve (3). The slopes of the first inclined plane (91) and the second inclined plane (92) are configured such that when the collar (4) is disengaged from the sleeve (3), the drive block (82) abuts against the push block (51) and begins to apply a pushing force to the cutter (5), so that the cutter (5) cuts the connecting line (41) only after the collar (4) is disengaged from the sleeve (3).

2. The electric ligator loop cutter linkage device according to claim 1, characterized in that: The mounting part (71) is provided with a limiting groove (72), and the cutter (5) is inserted into the limiting groove (72).

3. The electric ligator loop cutter linkage device according to claim 2, characterized in that: The limiting groove (72) is an arc-shaped groove (73) at one end near the connecting line (41), and the arc-shaped groove (73) is directly opposite the connecting line (41); the cutter (5) is elastic.

4. The electric ligator loop cutter linkage device according to claim 3, characterized in that: The connecting line (41) passes through the wall of the arc-shaped groove (73).

5. The electric ligator loop cutter linkage device according to claim 1, characterized in that: The first inclined plane (91) and the second inclined plane (92) are parallel and both form an acute angle with the sleeve (3).

6. The electric ligator loop cutter linkage device according to claim 5, characterized in that: The push tube (7) is provided with an axially extending groove (74). The drive sleeve (8) is provided with a slide head (81) with a snap-fit ​​groove (74).

7. The electric ligator loop cutter linkage device according to claim 3, characterized in that: The cutting edge of the cutter (5) forms an obtuse angle with the upper end face of the cutter (5).

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