Loop fastening device and single-shot electrically powered loop ligator

Abstract

The application is a kind of fast installation device for a collar and a single-shot electric ligation device. The device comprises a clamping sleeve for clamping the collar, a hard clamping rod for clamping the connecting line connected to the end of the collar, and a clamping cylinder installed in the housing of the ligation device and driven by the handle of the ligation device to move along the axial direction for clamping the clamping rod and stretching the connecting line. During the process of clamping the sleeve to the ligation end of the housing, the collar is automatically separated from the clamping sleeve and automatically clamped to the sleeve in the ligation device. The application realizes automatic installation, positioning and pre-tightening of the collar and completely replaces the traditional manual stretching installation mode.

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 a quick-release banding device and a single-shot electric banding device. Background Technology

[0002] In the field of hemorrhoid banding treatment, traditional multi-band ligation devices achieve continuous firing by pre-loading multiple elastic coils in the magazine to improve surgical efficiency. However, due to the significant elasticity of the elastic coils themselves, during continuous firing, the coils are prone to entanglement due to elastic deformation or friction with the inner wall of the device, causing them to become stuck in the magazine, resulting in device malfunction and interruption of the surgical process. This problem prompted technicians to improve the multi-band ligation device to a single-shot mode, that is, loading only one elastic coil for firing at a time.

[0003] However, existing single-shot ligation devices still have significant drawbacks: 1. The flexible elastic band needs to be manually stretched and precisely fitted onto the front end of the ligation device's cannula. Its elasticity makes the installation process time-consuming and difficult to fix, especially for novice operators who are prone to installation failure; 2. After the elastic band is used to ligate hemorrhoid tissue, the thread connecting it to the ligation device needs to be cut to achieve tissue detachment. Subsequently, the ligation device needs to be disassembled and any remaining knots removed. This process involves many steps and is time-consuming, increasing the complexity of the surgical operation; 3. Frequent disassembly and assembly of the ligation device will lead to accelerated wear and reduced accuracy, thereby reducing the lifespan of the ligation device.

[0004] In conclusion, there is an urgent need for a new type of ligation device that combines ease of operation, functional stability, and high reusability. Summary of the Invention

[0005] To address the technical problems in the background art, this invention discloses a quick-release ring-tying device and a single-engine electric tying device.

[0006] This invention provides a quick-release device for rings, comprising:

[0007] The ferrule is used to engage the loop portion of the ferrule, and also to engage the connecting wire extending from the loop portion towards the ferrule and connected to the end of the connecting wire; the ferrule can move away from the loop portion under the engaging action and is blocked when facing the loop portion; the loop portion can move towards the ferrule under the engaging action and is blocked when facing away from the ferrule.

[0008] The clamp is installed inside the housing of the ligator and is driven to move axially by the handle on the ligator. It is used to clamp the clamping rod and stretch and tighten the connecting wire.

[0009] During the process of the ferrule being fitted onto the sleeve end of the housing, the loop automatically disengages from the ferrule and automatically fits onto the sleeve inside the ligator.

[0010] The beneficial effects of the above settings are: 1. Before use, the ferrule is pre-attached to the ferrule. When the ligator needs to be used, it is only necessary to complete the following steps in sequence: attaching the ferrule to the housing, operating the handle to drive the cylinder to extend and retract, and pulling out the ferrule. This completes the automatic installation, positioning, and pre-tightening of the ferrule, completely replacing the traditional manual stretching installation method; 2. The ferrule and ferrule are consumable parts, and multiple parts can be set to match the ligator, allowing the ligator to be used repeatedly, thereby improving the utilization rate of the ligator; 3. The internal space of the ferrule is large, which can accommodate multiple clamping rods. When the connecting wire is cut, the elastic potential energy of the connecting wire is converted into kinetic potential energy at the moment of wire breakage, and moves to the tail of the ferrule, thus allowing the ligator to be used multiple times without disassembly.

[0011] The specific structure of the automatic disengagement of the ferrule is as follows: a guide part is provided inside the ferrule, and a sliding hole is provided inside the guide part; a sliding sleeve that engages with the ferrule is slidably connected inside the sliding hole; when the ferrule is fitted onto the housing, the sliding sleeve is blocked by the sleeve and moves away from the ferrule.

[0012] Because the sleeve sometimes moves a certain distance along with the sliding sleeve, causing it to be unstable in detaching from the sleeve and unable to be stably fitted onto the sleeve, a further improvement is made: the sliding sleeve is provided with a shoulder, the end face of which faces away from the locking rod; the sleeve is confined between the shoulder and the end of the guide section. With this design, the sleeve is blocked by the end of the guide section when the sliding sleeve moves, thus maintaining the stability of the sleeve's position.

[0013] The shoulder can obstruct the ring from disengaging from the slide. Therefore, a further improvement is made by arranging the end face of the shoulder at an angle.

[0014] The specific structure of the ferrule and the connecting rod is as follows: a connecting block is provided inside the ferrule; the connecting block is provided with a locking hole and an insertion hole that extend along the axial direction of the connecting rod and are connected in sequence; the diameter of the locking hole is larger than that of the through hole; the connecting rod is locked in the locking hole; and the connecting wire is inserted into the through hole.

[0015] Installing the ferrule inside the sleeve is difficult due to obstruction from the outer wall of the sleeve. Therefore, a further improvement is made: the part of the sleeve that engages with the ferrule is a semi-enclosed engagement part.

[0016] To simplify the installation of the snap-fit ​​rod, a further design feature is provided: the snap-fit ​​block has a slot that runs through the opening of the snap-fit ​​part; the slot is connected to the snap-fit ​​hole and the insertion hole; the end face of the snap-fit ​​hole and the slot that are connected as a whole has an arc shape.

[0017] When the sliding sleeve moves, the ring will be squeezed by the shoulder. If the sliding sleeve rotates, the ring will be twisted or even damaged. Based on this, the further improvement is that the wall of the sliding hole is provided with an inwardly radially protruding guide plate; the sliding sleeve is provided with a sliding groove for engaging the guide plate.

[0018] Because the sliding sleeve abuts against the sleeve, and the positions of the sliding sleeve and the sleeve will deviate when the sliding sleeve moves, it is difficult for the ferrule to accurately fit onto the sleeve. Therefore, a further improvement is made: a guide sleeve connected to a guide plate is also provided inside the ferrule; the guide sleeve is inserted into the sliding sleeve or simultaneously into both the sliding sleeve and the sleeve. With this configuration, when the ferrule is engaged and the sliding sleeve moves under the obstruction of the ferrule, the sleeve will automatically fit onto the guide sleeve, thereby improving the concentricity of the sliding sleeve and the sleeve, and ensuring that the ferrule accurately fits onto the sleeve.

[0019] This invention also discloses a single-shot electric ligator, including a quick-release loop device. This design makes the single-shot electric ligator more convenient and faster to use, and allows for repeated use. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of the installation structure of the ferrule and collar in this invention;

[0022] Figure 2 This is a schematic diagram of the ferrule structure in this invention;

[0023] Figure 3 This is an exploded view of the card sleeve in this invention;

[0024] Figure 4 This is a right view of the card sleeve in this invention;

[0025] Figure 5 yes Figure 4 Sectional view of AA;

[0026] Figure 6 yes Figure 5 Sectional view of BB;

[0027] Figure 7 This is a front sectional view of the thimble installed in front of the thimble clamp;

[0028] Figure 8 This is a front sectional view of the ferrule sleeve connecting to the ferrule and the sliding sleeve abutting against the sleeve.

[0029] Figure 9 This is the front sectional view of the ferrule as it is transferred from the sliding sleeve to the bushing.

[0030] Figure 10 This is a front sectional view of the collar mounting structure after the ferrule has been removed;

[0031] Figure 11 This is a schematic diagram of the structure of the single-shot electric ferrule in this invention when it is attached to the ferrule;

[0032] Figure 12This is a front view of the single-shot electric ferrule fitting in this invention.

[0033] Figure 13 This is a structural schematic diagram of the single-shot electric banding device from another perspective in this invention;

[0034] Figure 14 This is a schematic diagram of the hidden cover plate of the single-shot electric banding device in this invention;

[0035] Figure 15 yes Figure 14 Enlarged view of point C in the middle;

[0036] In the diagram: 1. Sleeve; 2. Ring; 3. Cylinder; 4. Housing; 5. Handle; 6. Sleeve; 7. Sliding sleeve; 8. Drive tube; 31. Groove; 32. Claw; 33. Claw tooth; 41. Magazine; 42. Cover plate; 71. Shoulder; 72. Slide groove; 73. Claw plate; 101. Guide part; 102. Sliding hole; 103. Claw block; 104. Claw hole; 105. Insertion hole; 106. Claw part; 107. Groove; 108. Guide plate; 109. Guide sleeve; 110. Connecting part; 111. Receiving part; 112. Limiting step; 113. Bottom groove; 114. End cap; 201. Ring part; 202. Connecting line; 203. Claw rod. Detailed Implementation

[0037] 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.

[0038] Example 1:

[0039] The present invention provides a quick-release device for a collar, comprising a retainer 1 and a retainer 3 mounted on a housing 4. The collar 2 includes an annular portion 201, with a connecting wire 202 extending vertically from one end of the portion 201, and a retaining rod 203 connected to the end of the connecting wire 202.

[0040] like Figure 1-6 As shown, the sleeve 1 is composed of a connecting part 110 and a snap-fit ​​part 106 that are sequentially connected and integrally formed. Figure 12For reference, the connecting portion 110 is a horizontally extending cylindrical shape, with a receiving portion 111 on its left and a guide portion 101 on its right. The diameter of the receiving portion 111 is larger than the diameter of the guide portion 101, so that the interior of the connecting portion 110 forms a limiting step 112 at the connection between the receiving portion 111 and the guide portion 101. The guide portion 101 is provided with a horizontally extending sliding hole 102, into which the sliding sleeve 7 is inserted for movement guidance. The left end of the sliding sleeve 7 is provided with a radially protruding retaining plate 73, the diameter of which is larger than the diameter of the sliding hole 102, allowing the retaining plate 73 to move within the space of the receiving portion 111 and be restricted by the left side of the receiving portion 111 and the limiting step 112. The left side of the receiving portion 111 is threadedly connected to an end cap 114 for easy disassembly and assembly of the sliding sleeve 7.

[0041] The wall of the sliding hole 102 is also provided with two symmetrically raised guide plates 108. The sliding sleeve 7 is provided with a groove 72 for engaging the guide plates 108, which is used to prevent the sliding sleeve 7 from rotating around its axis when it moves.

[0042] A shoulder 71 is provided at the middle position of the sliding sleeve 7, and the diameter of the left side of the shoulder 71 is smaller than the diameter of the right side. When the sliding sleeve 7 is positioned where the retaining plate 73 abuts against the limiting step 112, the right end face of the guide part 101, the part of the sliding sleeve 7 located on the left side of the shoulder 71, and the shoulder 71 form a limiting groove. The collar 2 is fitted onto the sliding sleeve 7 and is located within the limiting groove, thus achieving the installation limiting of the collar 2. The shoulder 71 is arranged at an angle, forming an obtuse angle with both sides of it. This arrangement also serves as a guide, facilitating the disengagement of the collar 2 from the sliding sleeve 7.

[0043] The locking part 106 has a semi-enclosed structure, with its end forming a U-shape that opens to the left. A locking block 103 protruding inwards is located on the upper right side of the sliding sleeve 7. The locking block 103 has a locking hole 104 and an insertion hole 105 extending axially along the locking rod 203 and connected sequentially from right to left. The diameter of the locking hole 104 is larger than that of the through hole. The locking block 103 also has a slot 107 extending through the opening of the locking part 106; the slot 107 communicates with the locking hole 104 and the insertion hole 105. With this configuration, when the locking rod 203 is inserted into the locking hole 104 from right to left, the connecting wire 202 only needs to be inserted into the insertion hole 105 through the slot 107, thus simplifying the locking process of the locking rod 203. The width of the slot 107 is set such that the end face connecting the locking hole 104 and the slot 107 forms an arc shape. This design improves the positional stability of the locking rod 203, making it less likely to detach from the slot 107. The locking block 103 also has a bottom groove 113, one end of which extends to the inner wall of the locking part 106, and the other end connects to the locking hole 104. The width of the bottom groove 113 is smaller than the diameter of the locking hole 104. This design of the bottom groove 113 and the slot 107 also divides the part of the locking block 103 with the locking hole 104 into upper and lower parts, making it elastic and facilitating the locking rod 203 to engage with the locking hole 104.

[0044] The clamping cylinder 3 is located above and parallel to the sleeve 6. A handle 5 is provided on the housing 4, with its middle hinged to the housing 4, its upper end engaging with the right end of the clamping cylinder 3, and its lower end for hand gripping. Rotating the handle 5 drives the clamping cylinder 3 to move left and right. A groove 31 is provided on the left end of the clamping cylinder 3, and adjacent grooves 31 form elastic claws 32 under the action of the grooves 31. Claws 33 are provided on the inner side of the claws 32 for engaging the upper end face of the clamping rod 203 facing the collar 2. When the clamping cylinder 3 moves to the left, it first contacts the right end of the clamping rod 203, and the claws 32 open under the action of the clamping rod 203. When the clamping cylinder 3 continues to move to the left until the claws 33 are on the left side of the clamping platform, the clamping cylinder 3 moves to the right, the claws 33 engage the clamping platform, and pull the clamping rod 203 to the right, causing the connecting line 202 to stretch and tighten.

[0045] like Figure 13-15 As shown, a magazine 41 communicating with the right end of the cartridge 3 is also provided on the right side of the housing 4. The cut-off locking rod 203 and connecting wire 202 are stored in the magazine 41. The magazine 41 is provided with a cover plate 42. By opening the cover plate 42, the cut-off locking rod 203 and connecting wire 202 can be taken out.

[0046] A guide sleeve 109 is also provided coaxially inside the sliding hole 102, integrally formed and connected with the upper and lower guide plates 108. The guide sleeve 109 is inserted into the sliding sleeve 7 or simultaneously inserted into the sliding sleeve 7 and the sleeve 6. With this configuration, when the sleeve 1 is engaged and the sliding sleeve 7 moves under the obstruction of the collar, the sleeve 6 will automatically engage with the guide sleeve 109, thereby improving the concentricity of the sliding sleeve 7 and the sleeve 6, and the collar 2 can accurately engage with the sleeve 6.

[0047] The working principle of this invention is as follows: Figure 7-12 As shown, 1. First, snap the collar 2 onto the sleeve 1; 2. The sleeve 1 is fitted onto the left end of the ligator, and when the sleeve 1 moves to the right, the right end of the sliding sleeve 7 abuts against the left end of the sleeve 6; 3. As the sleeve 1 continues to move to the right, the sliding sleeve 7 is blocked by the sleeve 6 and moves to the left. At this time, the guide sleeve 109 is inserted into the sleeve 6, and the collar 2 remains in the same position due to the obstruction of the right end face of the guide part 101; 4. When the sliding sleeve 7 retracts into the sliding hole 102 and the sleeve 6 is inserted into the sliding hole 102, the collar 2 automatically transfers and fits onto the left end of the sleeve 6; 5. Hold the handle 5 and drive the clamping cylinder 3 to move to the left to engage the clamping rod 203; 6. Release the handle 5, the handle 5 returns to its original position under the action of the torsion spring, and pulls the clamping rod 203 to the right, so that the connecting line 202 is stretched and taut to generate elastic force; 7. Remove the sleeve 1 to complete the installation of the collar 2.

[0048] The working principle of this invention for treating hemorrhoids is as follows: 1. The cannula 6 adsorbs hemorrhoid tissue under the action of a negative pressure pump; 2. Holding the handle 5, the drive tube 8 and the clamp 3, which are sleeved on the outside of the cannula 6, move to the left together; the drive tube 8 pushes the collar 2 to disengage from the cannula 6 and ligates it at the root of the hemorrhoid tissue; 3. The connecting line 202 is cut, so that the ligator is detached from the hemorrhoid tissue; 4. After the connecting line 202 is cut, the elastic potential energy of the connecting line 202 will be converted into kinetic energy, and the clamping rod 203 moves to the right into the magazine 41 under the action of kinetic energy, so that the ligator can be used again.

[0049] Compared with the prior art, the advantages of the present invention are: 1. Before use, the collar 2 is pre-attached to the sleeve 1. When the ligator needs to be used, it is only necessary to sequentially complete the sleeve 1 to fit the housing 4, operate the handle 5 to drive the cylinder 3 to extend and retract, and pull out the sleeve 1 to complete the automatic installation, automatic positioning and pre-tightening of the collar 2, completely replacing the traditional manual stretching installation method; 2. The collar 2 and sleeve 1 are consumable parts, which can be set to multiple parts that match the ligator, so that the ligator can be used repeatedly, thereby improving the utilization rate of the ligator; 3. The internal space of the cylinder 3 is large and can accommodate multiple clamping rods 203; when the connecting wire 202 is cut, the elastic potential energy of the connecting wire 202 is converted into kinetic potential energy and moves to the tail of the cylinder 3 at the moment the connecting wire 202 breaks, so that the ligator can be used multiple times without disassembly.

[0050] Example 2:

[0051] This invention also discloses a single-shot electric ligator, including the quick-release device for looping described in Embodiment 1. This design makes the single-shot electric ligator more convenient and faster to use, and allows for repeated use.

[0052] 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 quick-release ring-jointing device, characterized in that, include: The ferrule (1) is used to engage the loop portion (201) of the ferrule (2), and also to engage the connecting line (202) extending from the loop portion (201) in the direction of the ferrule and connected to the end of the connecting line (202); the connecting rod (203) can move away from the loop portion (201) under the engaging action and is blocked from facing the loop portion (201); the loop portion (201) can move towards the connecting rod (203) under the engaging action and is blocked from facing the connecting rod (203); The clamp (3) is installed inside the housing (4) of the ligator and is driven to move axially by the handle (5) on the ligator to clamp the clamping rod (203) and stretch the connecting line (202) taut. During the process of the sleeve (1) being fitted onto the sleeve end of the housing (4), the loop (201) automatically disengages from the sleeve (1) and automatically fits onto the sleeve (6) inside the ligator. The sleeve (1) is provided with a guide part (101), and the guide part (101) is provided with a sliding hole (102). The sliding hole (102) is slidably connected to a sliding sleeve (7) that engages with the ring (201). When the sleeve (1) is fitted onto the housing (4), the sliding sleeve (7) is blocked by the sleeve (6) and moves away from the ligator. The sliding sleeve (7) is provided with a shoulder (71), and the end face of the shoulder (71) faces away from the locking rod (203). The ring portion (201) is located between the shoulder portion (71) and the end of the guide portion (101); The part of the sleeve (1) that engages with the collar (2) is a semi-enclosed engagement part (106).

2. The quick-release device for ring assembly according to claim 1, characterized in that: The shoulder (71) is arranged at an angle.

3. The quick-release device for ring assembly according to claim 1, characterized in that: The card sleeve (1) is provided with a card block (103); The snap-fit ​​block (103) is provided with snap-fit ​​holes (104) and insertion holes (105) that extend along the axial direction of the snap-fit ​​rod (203) and are connected in sequence. The diameter of the card hole (104) is larger than that of the insertion hole (105). The locking rod (203) is locked into the locking hole (104); The connecting wire (202) is inserted into the socket (105).

4. The quick-release device for ring assembly according to claim 3, characterized in that: The snap-fit ​​block (103) is provided with a slot (107) that extends through the opening of the snap-fit ​​part (106). The slot (107) is connected to the card hole (104) and the insertion hole (105); The end face of the card hole (104) and the slot (107) connected as a whole has an arc shape.

5. The quick-release device for ring assembly according to claim 1, characterized in that: The wall of the sliding hole (102) is provided with an inwardly radially protruding guide plate (108). The sliding sleeve (7) is provided with a groove (72) for engaging the guide plate (108).

6. The quick-release device for ring assembly according to claim 5, characterized in that: The sleeve (1) is also provided with a guide sleeve (109) connected to the guide plate (108). The guide sleeve (109) is inserted into the sliding sleeve (7) or simultaneously into the sliding sleeve (7) and the sleeve (6).

7. A single-shot electric ligation device, characterized in that: The device includes a quick-release ring assembly as described in any one of claims 1-6.

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