Looping cutter linkage device of electric loop ligature device

Abstract

The invention provides a loop and cutter linkage device of an electric loop ligature device. The loop and cutter linkage device comprises a handle, a sleeve, a loop and a cutter which are installed on a shell of the loop ligature device. The sleeve is used for adsorbing haemorrhoids tissues; the ferrule is connected to the adsorption opening of the sleeve in a sleeving manner, is provided with a connecting line and is connected with the shell through the connecting line; the handle is hinged to the shell, the sleeve ring is driven to be separated from the sleeve through one-time percussion of the handle, the cutter is driven to move, and the connecting line on the sleeve ring separated from the sleeve is cut off. The sleeve ring can be sequentially driven to be separated from the sleeve and the cutter can be driven to move to cut off the connecting line by rotating the handle in the same direction, medical workers do not need to additionally prepare external tools such as scissors to cut off the connecting line, and the operation process that the sleeve ring is separated from the ligation device body is greatly simplified.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, in particular to a ligator for treating hemorrhoids, specifically an electric ligator loop cutter linkage device. Background Art

[0002] As a common anorectal disease, hemorrhoids can be treated in various ways. Among them, the ligation therapy is widely used because of its simple operation and definite curative effect. As an important tool for implementing the ligation therapy, the basic structure of an electric ligator usually includes a cannula and a loop. The loop is sleeved on the adsorption end of the cannula and is connected to the ligator body through a connecting line. During the operation of the ligator, first, the hemorrhoid tissue is adsorbed by the cannula under the action of negative pressure, and then the loop automatically sleeved on the root of the hemorrhoid tissue to achieve the ligation of the hemorrhoid tissue.

[0003] However, there are obvious deficiencies in the disconnection method between the loop and the ligator body of the existing electric ligator. Specifically, the currently commonly used method is to use external tools such as scissors to cut the connecting line after the loop ligation is completed, so that the loop is disconnected from the ligator body. Although this method can achieve the separation of the loop and the ligator, the operation process is relatively complex. Medical staff need to prepare additional tools such as scissors and maintain a high degree of concentration and accuracy during the operation to avoid unnecessary damage to the surrounding tissues. In addition, the method of cutting the connecting line with scissors may also increase the operation time, reduce the operation efficiency, and bring certain inconvenience and pain to the patient.

[0004] Therefore, in view of the deficiencies in the disconnection method between the loop and the ligator body of the existing electric ligator, it is necessary to propose a new technical solution to simplify the operation process, improve the operation efficiency, and reduce the trauma to the patient. Summary of the Invention

[0005] To solve the technical problems in the background art, the present invention discloses an electric ligator loop cutter linkage device.

[0006] The present invention provides an electric ligator loop cutter linkage device, which includes a handle, a cannula, a loop and a cutter installed on the housing of the ligator;

[0007] The cannula is used for adsorbing hemorrhoid tissue;

[0008] The loop is sleeved at the adsorption port position of the cannula. A connecting line is provided on the loop and is connected to the housing through the connecting line;

[0009] A push tube is sleeved outside the cannula;

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

[0011] With a single trigger pull of the handle, 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 separated from the sleeve.

[0012] The beneficial effects of the above settings are as follows: 1. With a single trigger pull of the handle, the actions of driving the ferrule away from the sleeve and driving the cutter to move to cut the connecting wire on the ferrule that has separated from the sleeve can be completed, eliminating the need for medical staff to prepare external tools such as scissors to cut the connecting wire, greatly simplifying the operation process of separating the ferrule from the main body of the ligator; 2. Avoiding the relatively time-consuming step of using scissors to cut the connecting wire reduces the surgical operation time, making the entire ligation operation process more efficient and contributing to improving 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 brought to the patient by the surgery and being beneficial to the patient's postoperative recovery.

[0013] Furthermore, an installation part is provided on the upper side of the push tube, and the cutter is arranged within the installation part. The beneficial effects of this setting are as follows: 1. The cutter is hidden within the installation part, preventing direct contact between the cutter and external objects, which can prevent the cutter from cutting the human body or splitting other items and causing them to be scrapped; 2. When the push tube moves, the cutter will move along, ensuring that the cutting edge of the cutter can always be aligned with the connecting wire; 3. The installation structure of the cutter also avoids the situation where the cutter and the push tube move unstably, resulting in the connecting wire being cut by the cutter before the ferrule has separated from the sleeve.

[0014] To improve the movement stability of the cutter, a further design is that a limiting groove is provided within the installation part, and the cutter is inserted into the limiting groove.

[0015] Since there is a spacing between the initial position of the cutter and the connecting wire, if a rigid structure is adopted for the cutter, the cutter needs to be set at an angle to the connecting wire. In this case, the volume of the installation part needs to be increased, not only making the structure of the ligator more complex but also increasing the cost. Based on this, a further improvement lies in that the end of the limiting groove close to the connecting wire is an arc-shaped groove, and the arc-shaped groove faces the connecting wire; the cutter has elasticity.

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

[0017] Since the handle is the only driving part, to realize the sequential detachment of the ferrule from the sleeve and the cutting of the connecting line by the cutter, a further design is as follows: A driving sleeve is also sleeved on the sleeve; the handle drives the push tube to move through the driving sleeve; under the action of the power transmission component, the driving sleeve first drives the push tube to move and then drives the cutter to move. The power transmission component specifically includes: a lifting block provided with a first inclined surface in contact with the driving sleeve and a second inclined surface in contact with the push tube; the first inclined surface and the second inclined surface are parallel and both form an acute angle with the sleeve; a push block fixed to the rear end of the cutter, and the push block passes through the mounting part and faces the driving sleeve.

[0018] Further, an axially extending chute is provided on the push tube; a sliding head for clamping the chute is provided on the driving sleeve. The sliding head clamps the chute, which not only realizes the movement guidance of the push tube and the driving sleeve, but also enables the sliding head to drive the push tube to reset.

[0019] The cutter is elastic. Therefore, under the action of its restoring force, the cutter will closely adhere to the upper end of the arc-shaped groove. In this way, the cutter is likely to cut the upper groove wall of the arc-shaped groove. Based on this, a further improvement lies in that: the cutting edge of the cutter forms an obtuse angle with the upper end surface of the cutter. With this setting, the cutting edge is separated from the upper groove wall of the arc-shaped groove and will not cause damage to the upper groove wall of the arc-shaped groove.

[0020] The beneficial effects of the present invention are as follows: 1. By a single trigger of the handle, the actions of driving the ferrule to detach from the sleeve and driving the cutter to move to cut the connecting line on the ferrule that has detached from the sleeve can be completed, without the need for medical staff to prepare additional external tools such as scissors to cut the connecting line, greatly simplifying the operation process of detaching the ferrule from the main body of the ligator; 2. Avoiding the relatively time-consuming step of using scissors to cut the connecting line reduces the operation time of the surgery, makes the entire ligation surgery process more efficient, and helps improve the utilization efficiency of medical resources; 3. The operation process is simplified and no additional tools are required, reducing 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 brought to the patient by the surgery, and being beneficial to the postoperative recovery of the patient. Description of the Drawings

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

[0022] Figure 1 is a schematic structural diagram of the present invention, in which a part of the housing is hidden;

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

[0024] Figure 3 is Figure 2 an enlarged view of part A in

[0025] Figure 4 is Figure 2 an enlarged view of part B in

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

[0027] Figure 6 It is a schematic installation structure view of the push tube, the lifting block and the driving sleeve;

[0028] Figure 7 It is Figure 6 exploded view;

[0029] Figure 8 It is a schematic structural view of the driving sleeve;

[0030] Figure 9 It is a right view of the driving sleeve;

[0031] Figure 10 It is a schematic installation structure view of the cutting knife and the pushing block;

[0032] Figure 11 It is Figure 10 enlarged view at position C in;

[0033] In the figure: 1. housing; 2. handle; 3. sleeve; 4. ferrule; 5. cutting knife; 6. handle; 7. push tube; 8. driving sleeve; 9. lifting block; 10. negative pressure pump; 11. first spring; 12. second spring; 41. connecting wire; 51. pushing block; 52. weight reduction hole; 53. fixing hole; 54. fixing block; 71. installation part; 72. limiting groove; 73. arc groove; 74. sliding groove; 75. first limiting part; 76. slot; 77. stress inclined surface; 81. sliding head; 82. driving block; 83. limiting plate; 84. clamping groove; 85. supporting surface; 86. driving inclined surface; 87. driving groove; 91. first inclined surface; 92. second inclined surface; 101. second limiting part. Detailed implementation mode

[0034] Now, the present invention will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only showing the basic structure of the present invention in a schematic way, so they only show the components related to the present invention.

[0035] As Figure 1 and Figure 2 shown, the present invention discloses an electric ligator ferrule cutting knife linkage device, which includes a handle 2, a sleeve 3, a ferrule 4, a push tube 7, a cutting knife 5 and a driving sleeve 8 installed on the housing 1 of the ligator.

[0036] Taking Figure 2As a reference view, a handle 6 extends downward from the right end of the housing 1 for human hand to hold. A handle 2 is provided on the left side of the handle 6. The middle of the handle 2 is hinged to the housing 1. The lower side of the hinge point is for human hand to hold, and the upper end of the hinge point is a driving end for driving the driving sleeve 8 to move. A torsion spring is provided at the hinge of the handle 2 for automatic reset of the handle 2.

[0037] The sleeve 3 is horizontally arranged on the upper part of the housing 1. A negative pressure pump 10 is installed in the handle 6, and its inlet is connected to the sleeve 3 to generate negative pressure in the sleeve 3 for adsorbing hemorrhoid tissues.

[0038] A collar 4 is sleeved at the position of the adsorption port at the left end of the sleeve 3. A connecting wire 41 that is vertically led out to the right and fixedly connected to the housing 1 is provided at the upper end of the collar 4.

[0039] A push tube 7 that is horizontally arranged and sleeved on 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 achieve moving guidance. The upper end of the push tube 7 is connected with a horizontally arranged and integrally injection-molded mounting portion 71, and a cutter 5 is arranged in the mounting portion 71. The beneficial effects of such a setting are as follows: 1. The cutter 5 is hidden in the mounting portion 71, avoiding direct contact between the cutter 5 and external objects, which can prevent the cutter 5 from cutting the human body or cutting other items and causing scrapping; 2. When the push tube 7 moves, the cutter 5 will move along, so that the cutting edge of the cutter 5 can always be aligned with the connecting wire 41; 3. The mounting structure of the cutter 5 also avoids unstable movement of the cutter 5 and the push tube 7, resulting in the connecting wire 41 being cut off by the cutter 5 before the collar 4 disengages from the sleeve 3.

[0040] A first limiting portion 75 that protrudes upward is provided at the right end of the mounting portion 71, and a second limiting portion 101 that protrudes downward is led out from the inner hole at the left end of the housing 1. The leftward movement limit of the push tube 7 is achieved by the first limiting portion 75 abutting against the second limiting portion 101.

[0041] A horizontally arranged limiting groove 72 is provided in the mounting portion 71. The left end of the limiting groove 72 is connected with an arc-shaped groove 73, and the arc-shaped groove 73 extends downward and is directly opposite to the connecting wire 41. The cutter 5 is made of an elastic sheet and is inserted into the limiting groove 72. With such a setting, the cutter 5 can deform. When the cutter 5 moves into the arc-shaped groove 73, it can bend and steadily cut off the connecting wire 41 along the arc-shaped groove 73. As shown in 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 used to reduce the strength of the left end of the cutter 5, making the cutter 5 easier to deform.

[0042] Since the cutter 5 has elasticity, under the action of its restoring force, the cutter 5 will closely adhere to the upper end of the arc-shaped groove 73. In this way, the cutter 5 is likely to cut the upper groove wall of the arc-shaped groove 73 and is also likely to insert into the groove wall of the arc-shaped groove 73, resulting in difficult movement. Therefore, as shown inFigure 3 As shown in the figure, the cutting edge of the cutter 5 and the upper end surface of the cutter 5 form an obtuse angle. With such a setting, the cutting edge is separated from the upper groove wall of the arc-shaped groove 73, which will not cause scratches to the upper groove wall of the arc-shaped groove 73, and can also move stably under the guiding action of the arc-shaped groove 73.

[0043] As Figure 3 shown in the figure, a slot 76 is provided at the connection between the mounting portion 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 distance between the slot 76 and the lower end of the arc-shaped groove 73. With such a setting, when the cutter 5 cuts, the cutting edge moves in the area of the arc-shaped groove 73 located in the push rod, and the connecting wire 41 can be stably cut off.

[0044] As Figure 11 shown in the figure, a fixing hole 53 penetrating up and down is provided at the right end of the cutter 5, and a fixing block 54 that engages with the fixing hole 53 extends downward from the left end of the push block 51. As Figure 4 shown in the figure, the left end of the push block 51 is connected to the mounting portion 71 through a first spring 11 for resetting the cutter 5; the right end of the push block 51 passes through the mounting portion 71 to the right.

[0045] As Figure 8 and Figure 9 shown in the figure, the driving sleeve 8 includes a driving block 82 in a U shape with an opening downward. The driving block 82 faces the push block 51 and is used to drive the push block 51 to move. Horizontal limiting plates 83 are connected to the lower ends of the driving blocks 82. The limiting plates 83 extend to the left and right sides of the driving block 82, and symmetric, inferior arc-shaped, concentrically arranged clamping grooves 84 are formed on the opposite sides. The groove walls of the clamping grooves 84 are attached to the outer wall of the sleeve 3, realizing the installation limit of the driving sleeve 8 and also realizing the movement limit of the driving sleeve 8. A concave driving groove 87 is provided on the outer side of the limiting plate 83, and the upper end of the handle 2 is clamped in the driving groove 87 for pushing the driving sleeve 8 to move left and right.

[0046] Two symmetrically arranged axially extending sliding grooves 74 are provided on the push tube 7; a sliding head 81 that engages with the sliding groove 74 is provided on the inner side of the left end of the limiting plate 83. The sliding head 81 engaging with the sliding groove 74 not only realizes the movement guiding of the push tube 7 and the driving sleeve 8, but also the sliding head 81 can drive the push tube 7 to reset.

[0047] As Figures 6 - 8 shown in the figure, an upward and leftward penetrating notch is provided at the left end of one of the limiting plates 83, so that a supporting surface 85 and a driving inclined surface 86 that are connected to each other and form an obtuse angle are formed at the notch. The supporting surface 85 is horizontal, and the driving inclined surface 86 forms an acute angle with the axis of the sleeve 3. A stress inclined surface 77 parallel to the driving inclined surface 86 is provided at the right end of the mounting portion 71. As Figure 5As shown, a lifting block 9 is installed on the housing 1. The top of the lifting block 9 is connected to the housing 1 through a second spring 12, which is used for the automatic descent and reset of the lifting block 9. The lower end abuts against the support surface 85, which is used for the descent limit of the lifting block 9. The lifting block 9 is provided with a first inclined surface 91 that fits with the driving inclined surface 86 and a second inclined surface 92 that fits with the force-receiving inclined surface 77. With such a setting, when the driving sleeve 8 moves to the left, the driving inclined surface 86 exerts a thrust on the first inclined surface 91, pushing the lifting block 9 to rise. During the rising process of the lifting block 9, the second inclined surface 92 exerts a thrust on the force-receiving inclined surface 77, thereby pushing the push tube 7 to move to the left. The push tube 7 exerts a thrust on the ferrule 4, causing the sleeve 3 to move to the left and disengage from the sleeve 3. Under the action of the above inclined surfaces, the moving distance of the driving sleeve 8 is greater than the moving distance of the push tube 7. Therefore, the slope of the above inclined surfaces is configured such that when the ferrule 4 disengages from the sleeve 3, the driving block 82 abuts against the push block 51 and starts to exert a thrust on the cutter 5, so that the cutter 5 cuts the connecting wire 41 only after the ferrule 4 disengages from the sleeve 3.

[0048] Compared with the prior art, the advantages of this embodiment are as follows: 1. By pressing the handle 2 once, the operation of driving the ferrule 4 to disengage from the sleeve 3 and driving the cutter 5 to cut the connecting wire 41 on the ferrule 4 that has disengaged from the sleeve 3 can be completed. There is no need for medical staff to prepare external tools such as scissors to cut the connecting wire 41 additionally, which greatly simplifies the operation process of disengaging the ferrule 4 from the ligator main body; 2. The relatively time-consuming step of using scissors to cut the connecting wire 41 is avoided, reducing the surgical operation time, making the entire ligature operation process more efficient, and contributing to improving the utilization efficiency of medical resources; 3. The operation process is simplified and no additional tools are required, reducing the risk of unnecessary damage to the surrounding tissues that may be caused by using tools such as scissors during the operation, reducing the pain and trauma brought to the patient by the operation, and being beneficial to the postoperative recovery of the patient.

[0049] Inspired by the above ideal embodiments according to the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An electric ligation device loop cutter linkage device, characterized in that: It includes a handle (2), a sleeve (3), a loop (4) and a cutter (5) installed on the housing (1) of the ligator; The sleeve (3) is used to adsorb hemorrhoid tissues; The loop (4) is sleeved at the adsorption port position of the sleeve (3). A connecting line (41) is provided on the loop (4) and is connected to the housing (1) through the connecting line (41); A push tube (7) is sleeved outside the sleeve (3); The handle (2) is hinged to the housing (1) and is used to drive the push tube (7) to move; By a single firing of the handle (2), the push tube (7) pushes the loop (4) away from the sleeve (3) and drives the cutter (5) to move to cut off the connecting line (41) on the loop (4) that has separated from the sleeve (3).

2. The electric ligator loop cutter linkage device according to claim 1, wherein: An installation part (71) is provided on the upper side of the push tube (7), and the cutter (5) is arranged in the installation part (71).

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

4. The electric ligator loop cutter linkage device according to claim 3, characterized in that: One end of the limiting groove (72) close to the connecting line (41) is an arc-shaped groove (73), and the arc-shaped groove (73) faces the connecting line (41); the cutter (5) is elastic.

5. The electric ligator loop cutter linkage device according to claim 4, wherein: The connecting line (41) penetrates through the groove wall of the arc-shaped groove (73).

6. The electric ligator loop cutter linkage device according to claim 2, wherein: A driving sleeve (8) is also sleeved on the sleeve (3); The handle (2) drives the push tube (7) to move through the driving sleeve (8); Under the action of the power transmission component, the driving sleeve (8) first drives the push tube (7) to move and then drives the cutter (5) to move.

7. The electric ligator loop cutter linkage device according to claim 6, wherein: The power transmission component includes: A lifting block (9) provided with a first inclined surface (91) in contact with the driving sleeve (8) and a second inclined surface (92) in contact with the push tube (7); the first inclined surface (91) and the second inclined surface (92) are parallel and both form an acute angle with the sleeve (3); A push block (51) fixedly connected to the rear end of the cutter (5); the push block (51) passes through the installation part (71) and faces the driving sleeve (8).

8. The electric ligator loop cutter linkage device according to claim 7, characterized in that: An axially extending sliding groove (74) is provided on the push tube (7); A sliding head (81) for clamping the sliding groove (74) is provided on the driving sleeve (8).

9. The electric ligation device loop cutter linkage device according to claim 4, characterized in that: The cutting edge of the cutter (5) forms an obtuse angle with the upper end surface of the cutter (5).

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