Locking device, ligation equipment and surgical instrument for endoscope

Abstract

The utility model discloses a locking device, ligation equipment and a surgical instrument for an endoscope, and belongs to the technical field of medical instruments.The locking device is used for locking a medical wire rod and comprises a pipe sleeve, the pipe sleeve is provided with a channel, and the medical wire rod can penetrate through the channel; and the locking piece can be at least partially arranged in the channel and can move relative to the pipe sleeve so as to extrude and lock the medical wire. In the embodiment of the invention, the locking device is provided with the locking piece, at least part of the locking piece is arranged in the channel of the pipe sleeve, and the locking piece can move relative to the pipe sleeve to extrude and lock the medical wire, so that the medical wire is locked, and the situation that the medical wire is loosened due to creeping of tissues or elasticity of the tissues is reduced; the operation efficiency and the operation success rate are improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of medical devices, and particularly relates to a locking device, a ligation device and a surgical instrument for an endoscope. BACKGROUND

[0002] When a tumor or tissue in a gastrointestinal environment is ligated, the line ring will rebound and loosen due to tissue peristalsis or tissue elasticity after being tightened. Loosening of the line ring will cause instrument failure when dealing with mucosal tissue ligation, reduce surgical efficiency, increase the length of surgery, and increase the pain of patients. Loosening of the line ring will cause perforation, ulceration, etc. when dealing with ligation, increase the difficulty of surgery, increase the pain of patients, and increase the risk of death of patients. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims to solve the technical problem that the medical line is loosened when being locked at present. Another object of the application is to provide a ligation device. A third object of the application is to provide a surgical instrument for an endoscope.

[0004] Technical scheme: The locking device provided by the application is used for locking a medical line, and comprises:

[0005] A sleeve having a channel configured to pass the medical line;

[0006] A locking piece configured to be at least partially arranged in the channel and movable relative to the sleeve to extrude and lock the medical line.

[0007] In some embodiments, the locking piece is configured to at least partially elastically deform under stress to extrude and lock the medical line.

[0008] In some embodiments, the locking piece comprises:

[0009] A locking portion having opposite fixed and locking ends, the fixed end being fixedly connected to the sleeve, the locking end being arranged in the channel and facing the first port of the channel, and the locking end being configured to move relative to the sleeve under the extrusion force of the medical line to extrude and lock the medical line.

[0010] In some embodiments, the locking end is provided with a convex portion and shoulder portions arranged on both sides of the convex portion, the convex portion being protrudingly arranged relative to the shoulder portions and facing the first port, and the convex portion and the shoulder portions being capable of contacting the medical line.

[0011] In some embodiments, the locking portion comprises a contact surface for contacting the medical wire, and an edge of the contact surface at the locking end is curved or zigzagged.

[0012] In some embodiments, the tube sleeve further comprises a notch in communication with the channel, the notch is shaped to match the shape of the locking portion, and the fixed end is disposed in the notch.

[0013] In some embodiments, the extension direction of the locking portion is inclined to the extension direction of the channel.

[0014] In some embodiments, the tube sleeve comprises a first side wall disposed opposite to the locking portion, and the locking portion is configured to extrude the medical wire against the first side wall.

[0015] In some embodiments, the locking member comprises two locking portions disposed opposite to each other, and the locking member is configured to extrude the medical wire between the two locking portions.

[0016] In some embodiments, the tube sleeve has a central axis, and the distance L between the locking portion and the central axis decreases from the fixed end to the locking end.

[0017] In some embodiments, the locking member has a threading hole for threading the medical wire;

[0018] The locking member is configured to move along the channel, and the tube sleeve is capable of extruding the locking member to extrude-lock the medical wire when the locking member moves along the channel.

[0019] In some embodiments, the tube sleeve is detachably sleeved on the outer periphery of the locking member.

[0020] In some embodiments, the locking member comprises a base and a clamping portion connected to one side of the base, and the threading hole penetrates through the base and the clamping portion.

[0021] The tube sleeve is capable of extruding the clamping portion to clamp-lock the medical wire when the locking member moves along the channel.

[0022] In some embodiments, the channel has opposite first and second ports, and the locking member is capable of penetrating into the channel from the first port.

[0023] In some embodiments, a direction from the first port to the second port is a first direction, the channel has a first dimension D in a direction perpendicular to the first direction, and the clamping portion has a second dimension d in the direction perpendicular to the first direction.

[0024] One of the first dimension D and the second dimension d gradually decreases along the first direction.

[0025] In some embodiments, the clamping portion is disposed on a side of the base portion close to the second port, and the first dimension D gradually decreases along the first direction.

[0026] In some embodiments, the clamping portion is disposed on a side of the base portion away from the second port, and the second dimension d gradually decreases along the first direction.

[0027] In some embodiments, the clamping portion comprises oppositely disposed first and second clamping arms, and the threading hole penetrates at least one of the first and second clamping arms.

[0028] One of the first and second clamping arms is provided with a groove in communication with the threading hole, and the other is provided with a protruding tooth opposite the groove.

[0029] The tube sleeve can extrude the clamping portion, so that the protruding tooth is embedded in the groove to clamp and lock the medical wire.

[0030] In some embodiments, the first and second clamping arms are both provided with the threading hole, and the first and second clamping arms are both provided with the groove and the protruding tooth, the groove of the first clamping arm and the protruding tooth of the second clamping arm are oppositely disposed, and the protruding tooth of the first clamping arm and the groove of the second clamping arm are oppositely disposed.

[0031] In some embodiments, the protruding teeth of the first and second clamping arms are staggered in the extension direction of the threading hole.

[0032] In some embodiments, the first clamping arm is provided with the groove, and the second clamping arm is provided with the protruding tooth, and the protruding tooth is oppositely disposed with the groove.

[0033] The threading hole has a first hole section, a second hole section and a third hole section arranged in sequence and in communication with each other, the first hole section is disposed in the base portion, the second hole section is disposed in the protruding tooth of the second clamping arm, the third hole section is disposed in the first clamping arm, and the groove is disposed between the first and third hole sections and in communication with the first and third hole sections, respectively.

[0034] In some embodiments, the locking member has a plurality of threading holes, and each threading hole penetrates the first and second clamping arms.

[0035] In some embodiments, the locking member is provided with a first limiting portion, and the inner wall of the sleeve is provided with a second limiting portion, the first limiting portion is arranged to be capable of being clamped and connected with the second limiting portion, so as to position the locking member in the channel.

[0036] In some embodiments, the first limiting portion is annularly arranged on the outer periphery of the locking member.

[0037] Correspondingly, the application also provides a ligation device, which comprises:

[0038] The locking device according to any one of the above embodiments, and

[0039] A medical wire is threaded through the locking device and is extruded and locked by the locking device.

[0040] In some embodiments, the medical wire comprises a first pull cable, a second pull cable and a wire ring, the first pull cable and the second pull cable are threaded through the locking device, and the wire ring is arranged on one side of the locking device and connected with the first pull cable and the second pull cable.

[0041] In some embodiments, the wire ring is located on the side of the second port away from the first port; or, the wire ring is located on the side of the locking member away from the sleeve.

[0042] Correspondingly, the application also provides a surgical instrument for an endoscope, which comprises the locking device according to any one of the above embodiments, or comprises the ligation device according to any one of the above embodiments.

[0043] Beneficial effects: the locking device provided by the application is used for locking a medical wire, and the locking device comprises: a sleeve, which has a channel, the channel is arranged to be capable of threading the medical wire; and a locking member, which is arranged to be capable of being at least partially arranged in the channel and being movable relative to the sleeve to extrude and lock the medical wire. In the application, the locking device is provided with the locking member, and at least part of the locking member is arranged in the channel of the sleeve and is movable relative to the sleeve to extrude and lock the medical wire, so that the medical wire is locked, the situation that the medical wire is loosened due to the peristalsis of tissues or the elasticity of tissues is reduced, and the operation efficiency and the operation success rate are improved.

[0044] The ligation device provided by the application can comprise all the technical features and technical effects of the above-mentioned locking device, which will not be described herein again.

[0045] The surgical instrument for an endoscope provided by the application can comprise all the technical features and technical effects of the above-mentioned locking device or the above-mentioned ligation device, which will not be described herein again. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0047] Figure 1 A structure schematic diagram of the locking device provided in the embodiment one of the present application;

[0048] Figure 2 Another angle structure schematic diagram of the locking device provided in the embodiment one of the present application;

[0049] Figure 3 A front view structure schematic diagram of the locking device provided in the embodiment one of the present application;

[0050] Figure 4 A cross-sectional structure schematic diagram of the locking device provided in the embodiment one of the present application along the line A-A in the locked medical wire state; Figure 3

[0051] Figure 5 A side view structure schematic diagram of the locking device provided in the embodiment one of the present application;

[0052] Figure 6 A three-dimensional structure schematic diagram after being cut along the line B-B; Figure 4

[0053] A schematic diagram of the locking device provided in the embodiment one of the present application threading the medical wire; Figure 7

[0054] Figure 8 A three-dimensional structure schematic diagram of the locking device provided in the embodiment two of the present application;

[0055] Figure 9 A side view structure schematic diagram of the locking device provided in the embodiment two of the present application;

[0056] Figure 10 A front view structure schematic diagram of the locking device provided in the embodiment two of the present application;

[0057] Figure 11 A cross-sectional structure schematic diagram along the line G-G; Figure 10

[0058] A structure schematic diagram of the locking device provided in the embodiment three of the present application; Figure 12

[0059] Another angle structure schematic diagram of the locking device provided in the embodiment three of the present application; Figure 13

[0060] A cross-sectional structure schematic diagram along the line H-H;​​

[0060] Figure 14 This is a schematic diagram of the main structure of the locking device provided in Embodiment 3 of this application;

[0061] Figure 15 For along Figure 14 Schematic diagram of the cross-sectional structure of the middle CC line;

[0062] Figure 16 This is a schematic diagram of the locking device provided in Embodiment 4 of this application;

[0063] Figure 17 This is a schematic diagram of the main structure of the locking device provided in Embodiment 4 of this application;

[0064] Figure 18 For along Figure 17 Schematic diagram of the cross-sectional structure of the middle DD line;

[0065] Figure 19 This is another cross-sectional perspective view of the locking device provided in Embodiment 4 of this application;

[0066] Figure 20 A schematic diagram showing the medical wire threaded through the locking device provided in Embodiment 4 of this application;

[0067] Figure 21 This is a schematic diagram of the locking device provided in Embodiment 5 of this application;

[0068] Figure 22 This is a schematic diagram of the main structure of the locking device provided in Embodiment 5 of this application;

[0069] Figure 23 For along Figure 22 Schematic diagram of the cross-sectional structure of the middle EE line;

[0070] Figure 24 This is a schematic diagram of the locking component structure of the locking device provided in Embodiment 5 of this application;

[0071] Figure 25 This is a schematic diagram of the sleeve structure of the locking device provided in Embodiment 5 of this application;

[0072] Figure 26 This is a top view of the locking device provided in Embodiment 5 of this application;

[0073] Figure 27 For along Figure 26 A schematic diagram of the structure after being cut along the FF line;

[0074] Figure 28 A schematic diagram of the locking device for locking medical wires provided in Embodiment 5 of this application;

[0075] Reference numerals: 10-Medical filament; 11-First cable; 12-Second cable; 13-Loop; 100-Tube sleeve; 110-Channel; 111-First port; 112-Second port; 120-Notch; 130-First sidewall; 140-Inner wall; 150-Second limiting part; 200-Locking member; 201-Threading hole; 202-First hole segment; 203-Second hole segment; 204-Third hole segment; 210-Locking part; 211-Fixing end; 212-Locking end; 213-Protrusion; 214-Shoulder; 215-Contact surface; 220-Base; 230-Clamping part; 231-First clamping arm; 232-Second clamping arm; 233-Protruding tooth; 234-Groove; 240-First limiting part; O-Central axis; X-First direction. Detailed Implementation

[0076] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0077] In the description of this application, it should be understood that the terms "proximal" and "distal" are used with the surgical operator (doctor) as the reference point. "Proximal" refers to the end of the surgical instrument closer to the operator, and "distal" refers to the end further away from the operator relative to the "proximal," i.e., closer to the patient. The terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or apparatus referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. "Multiple" means two or more, and "at least one" can mean one, two, or more, unless otherwise explicitly specified. The terms "installed," "connected," and "linked" should be interpreted broadly, for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two devices or the interaction between two devices, unless otherwise explicitly specified. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0078] In the description of this application, the first direction is introduced to facilitate the explanation of the relative positional relationship between the components in the locking device. The first direction is the direction from the first port 111 to the second port 112 in the locking device, which is also the extension direction of the channel 110. In the accompanying drawings of this application, the first direction X is indicated by an arrow marked X.

[0079] Locking devices, as medical instruments, can be used in various types of surgery to secure medical sutures, ensuring the smooth progress of the procedure and improving its success rate. For example, locking devices can be used to lock suture loops in tissue ligation surgery, to lock baskets in stone removal surgery, and to lock sutures in suturing surgery. In related techniques, medical sutures are directly bound using structures such as silicone tubes. When subjected to tissue peristalsis or elasticity, the silicone tubes retract, causing the originally secured suture loops to loosen.

[0080] In view of this, this application provides a locking device that can securely lock the medical suture 10 and can be used in various types of surgeries such as tissue ligation, vascular closure, stone removal, and suturing. The medical suture 10 can be a medical polymer suture.

[0081] Please refer to the following: Figures 1 to 28 The locking device in this application embodiment includes a sleeve 100 and a locking member 200. The sleeve 100 is the outer shell structure of the locking device, and at least a portion of the locking member 200 can be accommodated inside the sleeve 100, and they cooperate to lock the medical wire 10. Optionally, in this application... Figures 1 to 11 In the illustrated embodiments one and two, the sleeve 100 and the locking member 200 are configured as an integral structure, that is, they are integrally machined; in this application Figures 12 to 28 In the embodiments 3, 4 and 5 shown, the sleeve 100 and the locking member 200 are set as separate structures, that is, they are processed and formed separately and assembled together before or during use.

[0082] The cannula 100 has a channel 110 configured to allow a medical wire 10 to pass through. The channel 110 is a space formed inside the cannula 100 to allow the medical wire 10 to pass through. A first port 111 and a second port 112 are two openings of the channel 110, respectively formed at both ends of the cannula 100, so that the channel 110 extends through the cannula 100. Optionally, the medical wire 10 can enter the channel 110 from the first port 111 and exit from the second port 112, or it can enter the channel 110 from the second port 112 and exit from the first port 111.

[0083] The locking member 200 is configured to be at least partially disposed within the channel 110 and movable relative to the sleeve 100 to compress and lock the medical filament 10. That is, the locking member 200 can be fully disposed within the channel 110 or only partially inserted into the channel 110. During the locking of the medical filament 10 by this locking device, the locking member 200 is subjected to forces from the sleeve 100 or the medical filament 10, causing displacement relative to the sleeve 100 and thus generating sufficient compressive force to compress the medical filament 10 and lock it in place.

[0084] It is understood that in the embodiments of this application, the locking device is provided with a locking member 200, and at least a portion of the locking member 200 is disposed in the channel 110 of the sleeve 100, and can move relative to the sleeve 100 to squeeze and lock the medical suture 10, thereby locking the medical suture 10, reducing the occurrence of loosening due to tissue peristalsis or tissue elasticity, and improving surgical efficiency and surgical success rate.

[0085] In some embodiments, the locking member 200 is configured to at least partially undergo elastic deformation under stress to compress and lock the medical wire 10. For example, in Embodiments 1 and 2, when the medical wire 10 is inserted into the channel 110, the locking member 200 and the medical wire 10 compress each other, causing the locking member 200 to undergo a small displacement relative to the sleeve 100, i.e., elastic deformation, thereby locking the medical wire 10 in the channel 110 through its reaction force. For example, in Embodiments 3, 4, and 5, the medical wire 10 is inserted into the channel 110 and the thread hole 201 of the locking member 200. When the sleeve 100 is fitted onto the locking member 200 and displaces relative to the locking member 200, it can compress and bind the locking member 200, causing its size to shrink and generating elastic deformation, thereby compressing and locking the medical wire 10 in the channel 110.

[0086] Example 1

[0087] Please refer to the following: Figure 1 and Figure 2 In Embodiment 1 of this application, the sleeve 100 and the locking member 200 are connected to each other. They can be integrally formed or manufactured separately and then formed by welding, bonding, or other methods. Both the sleeve 100 and the locking member 200 can be made of medical-grade metal.

[0088] In Embodiment 1, the locking member 200 includes a locking portion 210, which has a fixed end 211 and a locking end 212, respectively. The fixed end 211 is fixedly connected to the sleeve 100 and is fixed relative to the sleeve 100. The locking end 212 is disposed within the channel 110 and faces the first port 111 of the channel 110. (See also...) Figure 4 and Figure 7 The locking end 212 is used to compress the medical wire 10. When the medical wire 10 is inserted into the channel 110, it occupies part of the locking part 210, thereby generating a compressive force on the locking end 212. The locking end 212 can undergo a small displacement under the compressive force of the medical wire 10, moving relative to the sleeve 100, i.e., from... Figure 4 and Figure 7 The dotted line position moves towards the solid line position, thereby generating elastic deformation. The elastic potential energy generated by this deformation increases the compressive force on the medical wire 10, thus locking the medical wire 10. Specifically, the locking part 210 can be a metal sheet structure.

[0089] In Embodiment 1, the sleeve 100 also has a notch 120 communicating with the channel 110. The shape of the notch 120 is adapted to the shape of the locking part 210, and the fixed end 211 is disposed in the notch 120. Specifically, it can be integrally stamped on a whole piece of tubular material by stamping.

[0090] In Example 1, as Figure 5 As shown, the side view of the sleeve 100 is roughly in the shape of a racetrack. In other embodiments, it can also be set to other shapes such as circles or ovals, which can be selected according to actual needs.

[0091] Please refer to the following: Figure 2 and Figure 7 In Embodiment 1, the locking end 212 is provided with a protrusion 213 and shoulders 214 on both sides of the protrusion 213. The protrusion 213 protrudes towards the first port 111 relative to the shoulders 214, and both the protrusion 213 and the shoulders 214 can contact the medical suture 10. By providing the structure of the protrusion 213 and shoulders 214 on the locking end 212, when the medical suture 10 is pulled along the first direction X, the protrusion 213 can act as a reverse barb, further locking the medical suture 10 and improving the stability of the lock. In addition, by providing the protrusion 213 and the shoulders 214 on both sides of the protrusion 213 on the locking end 212, the shoulders 214 on both sides can cooperate with the protrusion 213 to lock and fix the two strands of suture simultaneously. This allows the locking device to be used for ligation rings in ligation surgery, reducing the occurrence of loosening due to tissue peristalsis or tissue elasticity, and improving surgical efficiency and success rate.

[0092] Please refer to the following: Figure 2 , Figure 5 , Figure 6 and Figure 7 In Embodiment 1, the locking portion 210 includes a contact surface 215 for contacting the medical wire 10. The edge of the contact surface 215 at the locking end 212 is curved or zigzag-shaped. Specifically, this edge is... Figure 6 The boundary contour line of the contact surface 215 at the locking end 212 can be set to a curved or broken line shape to make the locking end 212 fit more closely with the medical wire 10, thereby further improving the locking effect.

[0093] Please see Figure 4 In Embodiment 1, the extending direction of the locking portion 210 is inclined to the extending direction of the channel 110. Specifically, by inclinedly positioning the locking portion 210 within the channel 110, when the medical suture 10 is threaded through the channel 110, spatial interference occurs between the medical suture 10 and the locking portion 210, causing the locking portion 210 to be slightly displaced to one side, i.e., from the dotted line position to the solid line position. The resulting elastic potential energy acts on the medical suture 10, further locking it. Furthermore, when the medical suture 10 is pulled along the first direction X, since the locking portion 210 extends inclinedly from its fixed end 211 to its locking end 212 toward the first port 111, the locking end 212 can generate reverse resistance against the medical suture 10, preventing it from continuing to move along the first direction X. Thus, when applied to ligation rings, the occurrence of loosening due to tissue peristalsis or tissue elasticity can be further reduced.

[0094] In the locking device shown in Embodiment 1, the locking member 200 has a locking portion 210 on only one side of the sleeve 100. The first sidewall 130 of the sleeve 100 and the locking portion 210 are disposed opposite to each other and cooperate to lock the medical wire 10. In use, the locking portion 210 can squeeze and lock the medical wire 10 onto the first sidewall 130.

[0095] Example 2

[0096] Please refer to the following: Figures 8 to 11 The structure of Embodiment 2 is largely similar to that of Embodiment 1. The difference is that in Embodiment 2, the locking member 200 includes two locking portions 210 arranged opposite to each other. That is, a locking portion 210 is provided on each of the two opposite side walls of the sleeve 100, and the two locking portions 210 are arranged opposite to each other. The locking member 200 is configured to compress and lock the medical wire 10 between the two locking portions 210. In use, the medical wire 10 is inserted into the channel 110 and passes through the two locking portions 210. By compressing the two locking portions 210 with the medical wire 10, the two portions are displaced to the sides, thereby applying a compressive force to the medical wire 10 between them and locking the medical wire 10.

[0097] Specifically, in Embodiment 2, the distance L between the locking portion 210 and the central axis O decreases from the fixed end 211 to the locking end 212. That is, the two locking portions 210 extend approximately in a conical shape within the channel 110 toward the first port 111. With this arrangement, during use, when the medical suture 10 is pulled along the first direction X, the locking ends 212 of the two locking portions 210 can generate reverse resistance against the medical suture 10, preventing it from continuing to move along the first direction X. Therefore, when the locking device of this embodiment is applied to a ligation ring, the occurrence of loosening due to tissue peristalsis or tissue elasticity can be further reduced.

[0098] Furthermore, when using the locking devices of Embodiments 1 and 2 to lock the ligature ring, after the tissue is tightened, the polymer thread is subjected to the reverse expansion force of the tissue and will attempt to expand outward at the tightened point. The sleeve 100 of the locking device can bend at the tightened point and use the locking part 210 to apply reverse force to prevent the polymer thread from expanding, changing the direction of force on the polymer thread and thus preventing outward expansion, thereby effectively locking the tightened polymer thread. Specifically, the loop 13 of the medical suture 10 can be located on the side of the second port 112 away from the first port 111.

[0099] Example 3

[0100] Please refer to the following: Figures 12 to 15 The difference between Embodiment 3 of this application and the previous embodiments is that in Embodiment 3, the sleeve 100 and the locking member 200 are separate structures and are independent of each other. By inserting the locking member 200 into the channel 110 of the sleeve 100, they cooperate with each other to lock the medical wire 10.

[0101] Please refer to the following: Figure 12 and Figure 13 In Embodiment 3, the locking member 200 has a threading hole 201 for threading a medical filament 10, which can be threaded through the threading hole 201. The locking member 200 is configured to move along the channel 110. When the locking member 200 moves along the channel 110, the sleeve 100 can compress the locking member 200 to compress and lock the medical filament 10. That is, the locking member 200 can be inserted into the channel 110 of the sleeve 100, and the compression of the locking member 200 by the sleeve 100 causes at least a portion of the structure of the locking member 200 to be compressed and deformed, thereby applying a compressive force to the medical filament 10 threaded through the threading hole 201 and locking the medical filament 10.

[0102] In Embodiment 3, the sleeve 100 is detachably fitted onto the outer periphery of the locking member 200. Before use, the sleeve 100 and the locking member 200 can be stored and transported separately, and then assembled together when in use.

[0103] Specifically, the locking member 200 includes a base 220 and a clamping portion 230 connected to one side of the base 220, with a threading hole 201 penetrating through the base 220 and the clamping portion 230. The clamping portion 230 is used to clamp the medical wire 10, and the base 220 is connected to the clamping portion 230 to connect multiple parts of the clamping portion 230 into a single unit. The clamping portion 230 extends to one side from the base 220, and the threading hole 201 extends through the base 220 and the clamping portion 230. When the locking member 200 moves along the channel 110, the sleeve 100 can compress the clamping portion 230, causing the clamping portion 230 to contract due to the compression from the sleeve 100, thereby clamping and locking the medical wire 10.

[0104] Please see Figure 15 In Embodiment 1, the channel 110 has a first port 111 and a second port 112, and the locking member 200 can be inserted into the channel 110 through the first port 111. In actual use, the clamping part 230 of the locking member 200 can be oriented toward the first port 111 and inserted into the channel 110 through the first port 111.

[0105] The channel 110 has a first dimension D in a direction perpendicular to the first direction X, and the clamping part 230 has a second dimension d in the same direction. That is, the inner diameter of the channel 110 is the first dimension D, and the outer diameter of the clamping part 230 is the second dimension d. In Embodiment 1, the first dimension D gradually decreases along the first direction X, meaning the inner diameter of the channel 110 decreases from the first port 111 to the second port 112. When the clamping part 230 is inserted into the channel 110 from the first port 111, the deeper the insertion, the smaller the first dimension D of the channel 110, resulting in greater pressure on the clamping part 230, greater contraction and deformation of the clamping part 230, and a greater clamping force on the medical suture 10 threaded through the suture hole 201, thus securing the medical suture 10 more firmly.

[0106] It should be noted that in this embodiment, "gradually decreasing" does not necessarily mean that the size continuously decreases; it is sufficient that the overall trend shows a decreasing trend. In other words, the inner diameter of channel 110 can decrease continuously or in a step-like manner, as long as the overall trend shows a decreasing trend.

[0107] Specifically, in Embodiment 1, the clamping part 230 is disposed on the side of the base 220 near the second port 112. Along the first direction X, the first dimension D gradually decreases, while the second dimension d remains unchanged. Optionally, the second dimension d may also gradually increase, or the second dimension d may gradually decrease but the decrease is less than the decrease in the first dimension D, so that when the clamping part 230 is inserted into the channel 110, the clamping part 230 is subjected to greater compressive force from the inner wall 140 of the sleeve 100 as the insertion depth increases.

[0108] Specifically, such as Figure 13 and Figure 15 As shown, the clamping part 230 includes a first clamping arm 231 and a second clamping arm 232 disposed opposite to each other, and the medical wire 10 is clamped by the first clamping arm 231 and the second clamping arm 232.

[0109] In Embodiment 1, the first clamping arm 231 and the second clamping arm 232 are respectively provided with threading holes 201, that is, one threading hole 201 passes through the first clamping arm 231 and the other threading hole 201 passes through the second clamping arm 232. Both the first clamping arm 231 and the second clamping arm 232 are provided with grooves 234 communicating with the threading holes 201. The grooves 234 of the first clamping arm 231 open towards the second clamping arm 232, and the grooves 234 of the second clamping arm 232 open towards the first clamping arm 231. Both the first clamping arm 231 and the second clamping arm 232 are provided with protruding teeth 233. The protruding teeth 233 of the first clamping arm 231 and the grooves 234 of the second clamping arm 232 are arranged opposite to each other. When the clamping part 230 is inserted into the channel 110, as the insertion depth increases, the clamping part 230 is squeezed by the inner wall 140 of the sleeve 100, and the protruding teeth 233 can be embedded in the groove 234 to clamp and lock the medical wire 10.

[0110] like Figure 15 As shown, in Embodiment 1, the protruding teeth 233 of the first clamping arm 231 and the protruding teeth 233 of the second clamping arm 232 are arranged alternately in the extending direction of the threading hole 201. As the clamping part 230 is inserted into the channel 110 and is squeezed by the inner wall 140 of the sleeve 100, the protruding teeth 233 of the two can mesh with each other, further clamping and locking the medical suture 10 in the threading hole 201.

[0111] When the locking device of Embodiment 3 is used to lock the ligature ring, the ligature ring is positioned on the side of the locking member 200 away from the sleeve 100. After the tissue is tightened, the end face of the locking member 200 abuts against the tightened tissue inside the ligature ring, thereby locking the tightened ligature ring more effectively.

[0112] Optionally, only one of the first clamping arm 231 and the second clamping arm 232 of the clamping part 230 may be provided with a threading hole 201. For example, only the first clamping arm 231 may be provided with a threading hole 201. At the same time, the first clamping arm 231 is also provided with a groove 234 communicating with the threading hole 201, and the second clamping arm 232 is provided with protruding teeth 233 opposite to the groove 234. By pressing the clamping part 230 with the sleeve 100, the protruding teeth 233 are embedded in the groove 234, which can also clamp and lock the medical wire 10.

[0113] Optionally, the thread hole 201 can be located between the first clamping arm 231 and the second clamping arm 232, that is, the medical wire 10 is threaded between the first clamping arm 231 and the second clamping arm 232. The medical wire 10 can also be clamped and locked by the sleeve 100 squeezing the clamping part 230.

[0114] Example 4

[0115] Please see Figures 16 to 20 The structure of Embodiment 4 of this application is generally similar to that of Embodiment 3. The difference is that in Embodiment 4, the clamping part 230 is disposed on the side of the base 220 away from the second port 112, and the second dimension d of the clamping part 230 gradually decreases along the first direction X. That is, the outer diameter of the clamping part 230 in Embodiment 4 gradually changes, and the outer diameter gradually increases from the base 220. The base 220 of the locking member 200 is inserted into the channel 110 from the first port 111. As the insertion depth increases, the outer diameter of the clamping part 230 becomes larger and larger, and therefore it is subjected to greater compression deformation by the inner wall 140 of the sleeve 100, so that the protrusion 233 can be embedded in the groove 234 to clamp and lock the medical wire 10.

[0116] Please refer to the following: Figure 17 and Figure 18 In Embodiment 4, the first clamping arm 231 is provided with a groove 234, and the second clamping arm 232 is provided with a protruding tooth 233, which is disposed opposite to the groove 234. In this embodiment, the locking member 200 has a plurality of threading holes 201, each threading hole 201 passing through the first clamping arm 231 and the second clamping arm 232, and each threading hole 201 is used to thread at least one strand of medical wire 10. Specifically, the threading hole 201 has a first hole segment 202, a second hole segment 203 and a third hole segment 204 arranged sequentially and communicating with each other. The first hole segment 202 is disposed in the base 220, the second hole segment 203 is disposed in the protruding tooth 233 of the second clamping arm 232, the third hole segment 204 is disposed in the first clamping arm 231, and the groove 234 is disposed between the first hole segment 202 and the third hole segment 204 and communicates with the first hole segment 202 and the third hole segment 204 respectively.

[0117] Please combine Figure 19 and Figure 20In use, the medical wire 10 is threaded through the threading hole 201 and the channel 110. The base 220 of the locking member 200 is inserted into the channel 110 from the first port 111. As the insertion depth increases, the clamping part 230 is squeezed and deformed by the inner wall 140 of the sleeve 100, and the locking effect on the medical wire 10 becomes stronger.

[0118] like Figure 20 As shown, when the locking device of Embodiment 4 is used to lock the ligature, the suture loop 13 is positioned on the side of the locking member 200 away from the sleeve 100. After the tissue is tightened, the end face of the locking member 200 (the face of the base 220 facing away from the clamping portion 230) abuts against the tightened tissue inside the suture loop 13, thereby more effectively locking and tightening the suture loop 13.

[0119] Please refer to it again. Figure 20 The locking member 200 is provided with a first limiting part 240, and the inner wall 140 of the sleeve 100 is provided with a second limiting part 150. The first limiting part 240 is configured to engage with the second limiting part 150 to position the locking member 200 within the channel 110. Specifically, the first limiting part 240 is a protrusion surrounding the outer periphery of the locking member 200, and the second limiting part 150 includes an annular protrusion formed on the inner wall 140 of the sleeve 100. The first limiting part 240 engages between two adjacent annular protrusions to position the locking member 200 within the channel 110.

[0120] Example 5

[0121] Please refer to the following: Figures 21 to 28 The structures of Embodiment 5 and Embodiment 4 of this application are generally similar. The difference is that in Embodiment 5, the locking member 200 has a threading hole 201, which passes through the first clamping arm 231 and the second clamping arm 232 and is used to thread at least one strand of medical wire 10. Specifically, the threading hole 201 has a first hole segment 202, a second hole segment 203 and a third hole segment 204 arranged sequentially and communicating with each other. The first hole segment 202 is disposed in the base 220, the second hole segment 203 is disposed in the protrusion 233 of the second clamping arm 232, and the third hole segment 204 is disposed in the first clamping arm 231. A groove 234 is disposed between the first hole segment 202 and the third hole segment 204 and communicates with the first hole segment 202 and the third hole segment 204 respectively.

[0122] Furthermore, unlike Embodiment 4, in Embodiment 5, the first limiting part 240 is an annular groove formed on the outer periphery of the locking member 200, and the second limiting part 150 is a protrusion formed on the inner wall 140 of the sleeve 100. The first limiting part 240 engages between two adjacent annular protrusions to position the locking member 200 within the channel 110.

[0123] Optionally, the tube sleeve 100 can be cylindrical or prismatic, or it can be an irregular shape, depending on the specific medical application requirements.

[0124] Accordingly, this application also provides a ligation device that can be used in surgeries such as tumor and tissue ligation and blood vessel closure in the gastrointestinal environment. Please refer again. Figure 4 , Figure 7 , Figure 20 and Figure 28 The ligation device includes a locking device according to any of the above embodiments and a medical thread 10, which can be one or more strands of nylon thread, metal thread, or other medical materials. The medical thread 10 passes through the locking device and is locked by compression from the locking device.

[0125] It is understood that the ligation device may include all the technical features and effects of the aforementioned locking device, which will not be elaborated here.

[0126] Please refer to it again. Figure 20 In some embodiments, the medical wire 10 includes a first cable 11, a second cable 12, and a loop 13. The first cable 11 and the second cable 12 pass through a locking device, and the loop 13 is disposed on one side of the locking device and connects the first cable 11 and the second cable 12.

[0127] Specifically, in Embodiment 1 and Embodiment 2 above, the wire loop 13 is located on the side of the second port 112 away from the first port 111. In Embodiment 3, Embodiment 4 and Embodiment 5 above, the wire loop 13 is located on the side of the locking member 200 facing away from the sleeve 100.

[0128] Accordingly, this application also provides a surgical instrument for endoscopy, which includes a locking device as described in any of the above embodiments, or a ligation device as described in any of the above embodiments. Therefore, the surgical instrument for endoscopy can include all the technical features and effects of the aforementioned locking device or ligation device, which will not be elaborated further here.

[0129] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0130] The locking device, ligation equipment, and surgical instruments for endoscopy provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A locking device, characterized in that The application relates to a locking device for locking a medical wire, comprising: a sleeve having a channel configured to pass the medical wire therethrough; a locking member configured to be at least partially arranged in the channel and movable relative to the sleeve to extrude and lock the medical wire.

2. The locking device of claim 1, wherein The locking member is configured to be elastically deformed at least partially under stress to extrude and lock the medical wire.

3. The locking device of claim 1, wherein The locking member comprises: a locking portion having opposite fixed and locking ends, the fixed end being fixedly connected to the sleeve, and the locking end being arranged in the channel and facing a first port of the channel, the locking end being configured to be movable relative to the sleeve under the extrusion of the medical wire to extrude and lock the medical wire.

4. The locking device of claim 3, wherein The locking end is provided with a protrusion and shoulders arranged on both sides of the protrusion, the protrusion being protrudingly arranged relative to the shoulders and facing the first port, and the protrusion and the shoulders being capable of contacting the medical wire.

5. The locking device of claim 3, wherein The locking portion comprises a contact surface for contacting the medical wire, the edge of the contact surface at the locking end being curved or zigzag-shaped.

6. The locking device of claim 3, wherein The sleeve further has a notch in communication with the channel, the notch being shaped to match the shape of the locking portion, and the fixed end being arranged in the notch.

7. The locking device of claim 3, wherein The extension direction of the locking portion is inclined to the extension direction of the channel.

8. A locking device according to any one of claims 3 to 7, characterised in that, The sleeve comprises a first side wall arranged opposite to the locking portion, and the locking portion is configured to extrude and lock the medical wire on the first side wall.

9. A locking device according to any one of claims 3 to 7, characterised in that, The locking member comprises two locking portions arranged opposite to each other, and the locking member is configured to extrude and lock the medical wire between the two locking portions.

10. The locking device of claim 9, wherein, The sleeve has a central axis, and the distance L between the locking portion and the central axis decreases from the fixed end to the locking end.

11. The locking device of claim 1, wherein, The locking member has a wire passing hole for passing the medical wire therethrough; The locking member is configured to be movable along the channel, and the sleeve is capable of extruding the locking member to make the locking member extrude and lock the medical wire when the locking member moves along the channel.

12. The locking device of claim 11, wherein, The sleeve is detachably arranged on the outer periphery of the locking member.

13. The locking device of claim 11, wherein, The locking member comprises a base and a clamping portion connected to one side of the base, and the wire passing hole penetrates through the base and the clamping portion; The sleeve is capable of extruding the clamping portion to make the clamping portion clamp and lock the medical wire when the locking member moves along the channel.

14. The locking device of claim 13, wherein, The channel has opposite first and second ports, and the locking member is capable of passing into the channel from the first port.

15. The locking device of claim 14, wherein, A direction from the first port to the second port is a first direction, the channel has a first dimension D in a direction perpendicular to the first direction, and the clamping portion has a second dimension d in the direction perpendicular to the first direction; One of the first dimension D and the second dimension d gradually decreases along the first direction.

16. The locking device of claim 15, wherein, The clamping portion is arranged on one side of the base close to the second port, and the first dimension D gradually decreases along the first direction.

17. The locking device of claim 15, wherein, The clamping portion is arranged on the side of the base portion away from the second port, and the second dimension d gradually decreases along the first direction.

18. The locking device of claim 13, wherein, The clamping portion comprises oppositely arranged first and second clamping arms, and the threading hole penetrates at least one of the first and second clamping arms. One of the first and second clamping arms is provided with a groove in communication with the threading hole, and the other is provided with a protruding tooth opposite the groove. The sleeve can extrude the clamping portion, so that the protruding tooth is embedded in the groove to clamp and lock the medical wire.

19. The locking device of claim 18, wherein, Both the first and second clamping arms are provided with the threading hole, and both are provided with the groove and the protruding tooth. The groove of the first clamping arm and the protruding tooth of the second clamping arm are oppositely arranged, and the protruding tooth of the first clamping arm and the groove of the second clamping arm are oppositely arranged.

20. The locking device of claim 19, wherein, In the extension direction of the threading hole, the protruding teeth of the first and second clamping arms are staggered.

21. The locking device of claim 18, wherein, The first clamping arm is provided with the groove, and the second clamping arm is provided with the protruding tooth, and the protruding tooth is oppositely arranged with the groove. The threading hole has a first hole section, a second hole section and a third hole section arranged in sequence and in communication with each other. The first hole section is arranged in the base portion, the second hole section is arranged in the protruding tooth of the second clamping arm, and the third hole section is arranged in the first clamping arm. The groove is arranged between the first and third hole sections and communicates with the first and third hole sections, respectively.

22. The locking device of claim 21, wherein, The locking member has a plurality of threading holes, each of which penetrates the first and second clamping arms.

23. The locking device of claim 13, wherein, The locking member is provided with a first limiting portion, and the inner wall of the sleeve is provided with a second limiting portion. The first limiting portion is arranged to be able to be clamped and connected with the second limiting portion to position the locking member in the channel.

24. The locking device of claim 23, wherein, The first limiting portion is annularly arranged on the outer periphery of the locking member.

25. A ligating apparatus, comprising: The locking device according to any one of claims 1 to 24, and The medical wire penetrates the locking device and is extruded and locked by the locking device. The medical wire comprises a first pull cable, a second pull cable and a wire ring. The first and second pull cables penetrate the locking device, and the wire ring is arranged on one side of the locking device and connects the first and second pull cables.

26. The ligation device of claim 25, wherein, The wire ring is located on the side of the second port away from the first port; or, the wire ring is located on the side of the locking member away from the sleeve.

27. The ligation device of claim 26, wherein, The locking device according to any one of claims 1 to 24, or the ligation equipment according to any one of claims 25 to 27.

28. A surgical instrument for an endoscope, characterized by ​

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