An elastic thread tightening mechanism for an anorectal ligation device

Abstract

The utility model belongs to the technical field of medical apparatus and instruments, concretely relates to a kind of elastic line tightening mechanism for anorectal ligation device, including connecting pipe and roller assembly, the one end of connecting pipe away from roller assembly is connected with ligation head, and ligation head is equipped with suction cavity, and the one end of ligation head is suction end, and the other end is connecting end, and the side wall of ligation head is equipped with threading hole for elastic line from suction end to connecting end, and the threading hole opening of connecting end is located in connecting pipe.In, roller assembly rotation is equipped with winding roller by the driving of driving assembly, and the end of winding roller close to connecting pipe is set.The utility model is connected to winding roller by the one end of elastic line, and when winding roller rotates under the driving of driving assembly, elastic line is wound to winding roller in turn, and then is tightened, instead of the mode of manually tensioning elastic line, and operation is also more simple and quick.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to an elastic thread tightening mechanism for an anorectal ligator. Background Technology

[0002] The rectal ligator is an important medical device used to treat diseases such as hemorrhoids. The main working principle of the rectal ligator is to form a tight loop around the diseased tissue using the ligating head, thereby blocking blood flow to the diseased tissue, causing it to necrose and eventually detach. The advantages of using this device for ligation are its ease of operation and low incidence of complications.

[0003] During the ligation process using a ligator, after the elastic thread is placed on the lesion tissue, it needs to be tightened to block blood flow to the diseased tissue. Looking at the various existing solutions for anorectal ligators, most involve manually tightening the elastic thread, requiring at least two people to operate. If not handled carefully, the elastic thread can easily be pulled off the ligature.

[0004] Therefore, it is necessary to improve the existing solutions for rectal ligation devices to solve the aforementioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide an elastic thread tightening mechanism for anorectal ligation devices to solve the problems mentioned in the background art.

[0006] To achieve the above-mentioned technical objectives, the technical solution of this utility model is as follows: An elastic cord tightening mechanism for an anorectal ligator includes a connecting tube and a roller assembly. The end of the connecting tube away from the roller assembly is connected to a ligating head. The ligating head has a suction chamber inside. One end of the ligating head is a suction end, and the other end is a connecting end. A threading hole for the elastic cord to pass through is provided on the side wall of the ligating head from the suction end to the connecting end. The opening of the threading hole at the connecting end is located inside the connecting tube. The roller assembly is equipped with a winding roller driven by a drive assembly, and the winding roller is located near the end of the connecting tube.

[0007] As a further improvement, a winding groove is provided on the circumference of the winding roller, and a first bevel gear is fixedly connected to one end of the winding roller. The drive assembly includes a drive motor, and the drive motor is connected to a second bevel gear. The first bevel gear and the second bevel gear mesh with each other.

[0008] As a further improvement, one end of the elastic cord is provided with a slipknot, which is fitted onto the outer surface of the binding head, and the other end of the elastic cord passes through the threading hole and connects to the winding roller.

[0009] As a further improvement, a rotary cutting mounting tube is provided inside the connecting tube, and the elastic wire passes through the rotary cutting mounting tube and connects to the winding roller.

[0010] As a further improvement, the power line of the drive motor is connected to a current sensor and a relay, which are respectively connected to the controller.

[0011] Due to the adoption of the above technical solution, the beneficial technical effects of this utility model are as follows: This utility model provides an elastic cord tightening mechanism for anorectal ligation devices. One end of the elastic cord has a slipknot that is fitted onto the outer surface of the ligation head, then passes through a threading hole and connects to a winding roller. When the ligation head draws in lesion tissue, the winding roller is rotated to tighten the elastic cord. The slipknot at the other end of the elastic cord detaches from the outer surface of the ligation head and becomes ligated onto the lesion tissue. As the elastic cord tightens, the slipknot also tightens further on the lesion tissue. Furthermore, the end face of the suction end of the ligation head limits the position of the elastic cord knot, preventing the elastic cord from detaching from the lesion tissue during tightening. The operation is simple, can be performed by a single person, and provides excellent elastic cord tightening. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an assembly diagram of the elastic cord snap fastener and the tying head of this utility model.

[0013] Wherein: 1-connecting pipe, 2-roller assembly, 201-winding roller, 2011-winding groove, 3-sleeving head, 301-suction chamber, 302-threading hole, 303-suction end, 304-connecting end, 4-elastic wire, 5-drive assembly, 501-drive motor, 502-second bevel gear, 503-first bevel gear. Detailed Implementation

[0014] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. However, those skilled in the art will understand that the embodiments described below are only some embodiments of this utility model, not all embodiments, and are only used to illustrate this utility model, and should not be regarded as limiting the scope of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall be followed. Where the manufacturers of reagents or instruments are not specified, they are all conventional products that can be purchased commercially.

[0015] like Figure 1-2As shown, an elastic cord tightening mechanism for an anorectal ligator includes a connecting tube 1 and a roller assembly 2. The end of the connecting tube 1 away from the roller assembly 2 is connected to a ligating head 3. The ligating head 3 is provided with an suction chamber 301. The suction chamber 301 is connected to a negative pressure device through a trachea. The suction chamber 301 is used to contain lesion tissue. One end of the ligating head 3 is the suction end 303, and the other end is the connecting end 304. A threading hole 302 for the elastic cord 4 to pass through is provided on the side wall of the ligating head 3 from the suction end 303 to the connecting end 304. The opening of the threading hole 302 of the connecting end 304 is located inside the connecting tube 1. The roller assembly 2 is equipped with a winding roller 201 driven by the drive assembly 5, and the winding roller 201 is located near the end of the connecting pipe 1.

[0016] In use, the elastic thread 4 passes through the threading hole 302, and one end of the elastic thread 4 has a slipknot and is looped around the outside of the ligating head 3. The drive assembly 5 drives the winding roller 201 to rotate, and the other end of the elastic thread 4 is wound around the circumferential side of the winding roller 201 one turn at a time, and the elastic thread 4 is gradually tightened. The slipknot gradually slides down from the outer surface of the ligating head 3 to the root of the lesion tissue, and the slipknot is tightened accordingly.

[0017] In this embodiment, a winding groove 2011 is provided on the circumferential surface of the winding roller 201. A first bevel gear 503 is fixedly connected to one end of the winding roller 201. The drive assembly 5 includes a drive motor 501, which is connected to a second bevel gear 502. The first bevel gear 503 and the second bevel gear 502 mesh with each other. The drive motor 501 drives the second bevel gear 502 to rotate, and the second bevel gear 502 drives the first bevel gear 503 and the winding roller 201 to rotate. The winding groove 2011 on the winding roller 201 limits the position of the elastic cord 4, preventing the elastic cord 4 from falling off the winding roller 201. In this embodiment, one end of the elastic cord 4 is provided with a slip knot, which is sleeved on the outer surface of the binding head 3. The elastic cord 4 passes through the threading hole 302 and is connected to the winding roller 201.

[0018] In this embodiment, a rotary cutting mounting tube is provided inside the connecting tube 1, and the elastic wire 4 passes through the rotary cutting mounting tube and connects to the winding roller 201. The elastic wire 4 is set inside the rotary cutting mounting tube, which can effectively reduce the external size of the connecting tube 1 and make the operation and use more flexible.

[0019] In this embodiment, the power supply line of the drive motor 501 is connected to a current sensor and a relay, and the current sensor and the relay are respectively connected to the controller.

[0020] A current sensor detects the current flowing through the drive motor 501 and transmits the result to the controller. The controller sends commands to a relay based on the current sensor's readings. The relay then connects or disconnects the drive motor 501's circuit according to the controller's commands, thus controlling the start and stop of the drive motor 501. Specifically, in the initial stage when the elastic cord 4 is tightened, the current inside the drive motor 501 is within the normal range. As the elastic cord 4 is further tightened, the load on the drive motor 501 gradually increases, and the internal current gradually increases. When the elastic cord 4 is tightened to a set state, the current inside the drive motor 501 also reaches the set value. The current sensor transmits the detected current value to the controller, which sends a command to the drive motor 501 to disconnect the circuit, and the drive motor 501 stops operating. After the elastic cord 4 is cut, the slipknot is thus tightened and placed around the base of the lesion tissue.

[0021] In this embodiment, during use, the ligating head 3 is aligned with and contacts the lesion tissue. The negative pressure device is activated, and a certain negative pressure is generated within the suction chamber 301, drawing the lesion tissue into it. The drive motor 501 is then activated, driving the second bevel gear 502 to rotate. The second bevel gear 502, in turn, drives the first bevel gear 503 and the winding roller 201 to rotate. The elastic cord 4 is wound around the winding roller 201 turn by turn, and the knot formed at the other end of the elastic cord 4 gradually slides from the outer wall of the ligating head 3 to the root of the lesion tissue. As the elastic cord 4 is further tightened, the load on the drive motor 501 gradually increases, and the internal current gradually increases. When the elastic cord 4 is tightened to the set state, the current inside the drive motor 501 also reaches the set value. The current sensor connected to the power line of the drive motor 501 transmits the detected current value to the controller, which then sends a command to the drive motor 501 to disconnect the circuit, causing the drive motor 501 to stop operating. After the elastic thread 4 is cut, the slipknot is tightened and placed around the root of the lesion tissue.

[0022] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A tensioning mechanism for an anorectal ligator, comprising a connecting tube and a roller assembly, wherein a ligating head is connected to one end of the connecting tube away from the roller assembly, and the ligating head has a suction chamber therein, characterized in that, One end of the ligating head is an intake end, and the other end is a connecting end. A threading hole for the elastic cord to pass through is provided on the side wall of the ligating head from the intake end to the connecting end. The opening of the threading hole at the connecting end is located inside the connecting tube. The roller assembly is rotatably provided with a winding roller driven by a drive assembly, and the winding roller is located near the end of the connecting tube.

2. The elastic thread tightening mechanism for the rectal ligator according to claim 1, characterized in that, The winding roller has a winding groove on its circumference. One end of the winding roller is fixedly connected to a first bevel gear. The driving assembly includes a drive motor, and the drive motor is connected to a second bevel gear. The first bevel gear and the second bevel gear mesh with each other.

3. The elastic thread tightening mechanism for the rectal ligator according to claim 1, characterized in that, One end of the elastic cord is provided with a slipknot, which is fitted onto the outer surface of the tying head. The other end of the elastic cord passes through the threading hole and is connected to the winding roller.

4. The elastic thread tightening mechanism for the rectal ligator according to claim 1, characterized in that, The connecting tube is equipped with a rotary cutting installation tube, and the elastic wire passes through the rotary cutting installation tube and is connected to the winding roller.

5. The elastic thread tightening mechanism for the rectal ligator according to claim 2, characterized in that, The power line of the drive motor is connected to a current sensor and a relay, and the current sensor and the relay are respectively connected to the controller.

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