Locking mechanism, tissue ligation device, and surgical instrument for endoscope

Abstract

The utility model discloses a locking mechanism, tissue ligation equipment and a surgical instrument for an endoscope, and belongs to the technical field of medical instruments.The locking mechanism is characterized in that a locking piece and an elastic piece are arranged in a shell containing cavity of the locking mechanism, the elastic piece can generate elastic force due to elastic deformation of the elastic piece, the elastic force acts on the locking piece, and the locking piece is locked through the elastic piece; and the locking piece is continuously extruded. The first wire passing hole, the second wire passing hole and the containing cavity of the shell can be used for allowing the medical wire to penetrate through, the locking piece can press the medical wire arranged in the containing cavity in a penetrating mode on the shell due to the fact that the locking piece is extruded by the elastic force of the elastic piece, and therefore the medical wire can be fixed, and locking of the medical wire is achieved. Moreover, as the elastic force of the elastic piece continuously acts on the locking piece, the medical wire can be continuously extruded, the situation that the medical wire is loosened due to creeping or elasticity of tissue is reduced, and the operation efficiency and the operation success rate are improved.

Description

TECHNICAL FIELD

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

[0002] In some surgeries, a locking mechanism is needed to lock a wire loop, a basket, or the like. For example, in a digestive tract surgery, when a tumor or tissue needs to be ligated, the wire loop must be locked. However, the current locking method has some problems. During the tightening process, due to the peristalsis or elasticity of the tissue, the wire loop will rebound and loosen. The loosening of the wire loop will cause the instrument to fail, reduce the efficiency of the surgery, and increase the length of the surgery. In addition, it can also cause perforation, rupture, and increase the difficulty of the surgery, increase the pain of the patient, and increase the risk of death of the patient. SUMMARY

[0003] The present application provides a medical locking mechanism, which aims to solve the technical problem that the medical wire material will loosen when locked at present. Another object of the present application is to provide a tissue ligation device. A third object of the present application is to provide an endoscope surgical instrument.

[0004] Technical solution: The locking mechanism provided by the present application is used to lock a medical wire material, and the locking mechanism comprises:

[0005] A housing having a receiving cavity, a first wire passing hole, and a second wire passing hole, the first wire passing hole and the second wire passing hole being in communication with the receiving cavity, the first wire passing hole, the receiving cavity, and the second wire passing hole being used to pass the medical wire material;

[0006] A locking member arranged in the receiving cavity;

[0007] An elastic member arranged in the receiving cavity and connected with the housing and the locking member, the elastic member being arranged to apply an elastic force to the locking member, so that the locking member can press the medical wire material on the housing.

[0008] In some embodiments, the first wire passing hole, the receiving cavity, and the second wire passing hole are arranged in a first direction in sequence.

[0009] The locking member has a wire passing channel extending in the first direction, and the wire passing channel is used to pass the medical wire material.

[0010] In some embodiments, the locking member has a plurality of wire passing channels, and the locking member is arranged to be affected by the elastic force, so as to press the medical wire material passing in each wire passing channel on the housing.

[0011] In some embodiments, the elastic member is arranged to apply an elastic force to the locking member along the first direction, so as to enable the locking member to press the medical wire against the first inner wall of the housing.

[0012] The wire passage has a passage opening, which is formed on a side of the locking member away from the elastic member, and at least a portion of the passage opening is formed towards the first inner wall in the first direction.

[0013] In some embodiments, the locking member comprises a first outer wall opposite to the first inner wall and facing away from the elastic member, and the passage opening is arranged on the first outer wall, and the first outer wall and the first inner wall are both inclined to the first direction.

[0014] In some embodiments, the second wire hole is located on a side of the locking member away from the elastic member.

[0015] The first inner wall is arranged on a side of a hole wall of the second wire hole close to the locking member and connected to the hole wall, and the first inner wall extends obliquely away from the second wire hole and close to the elastic member.

[0016] In some embodiments, the locking member is arranged to be affected by the elastic force, and an end of the locking member away from the elastic member can at least partially extend into the second wire hole.

[0017] In some embodiments, the housing has a plurality of the second wire holes, and the number of the second wire holes is consistent with the number of the wire passages.

[0018] In some embodiments, the accommodation cavity has a tapered section, the first inner wall encloses the tapered section, and the size L1 of the tapered section gradually decreases along the first direction.

[0019] The locking member comprises a tapered portion, at least a portion of the tapered portion is located in the tapered section, the size L2 of the tapered portion gradually decreases along the first direction, and the first outer wall is arranged on the tapered portion.

[0020] In some embodiments, the first outer wall forms an angle α with the first direction, and the portion of the first inner wall opposite to the first outer wall forms an angle β with the first direction, and β≥α is satisfied.

[0021] In some embodiments, the wire passage extends along a straight line in the first direction.

[0022] In some embodiments, the first wire hole, the wire passing channel and the second wire hole are arranged in sequence in the first direction, the second wire hole has an axis extending in the first direction, and a plurality of the wire passing channels are arranged on the periphery of the axis.

[0023] In some embodiments, the first wire hole, the accommodation cavity and the second wire hole are coaxially arranged in the first direction.

[0024] In some embodiments, the shell is provided with a first guide portion, the locking member is provided with a second guide portion matched with the first guide portion, and the second guide portion is guided and matched with the first guide portion to guide the locking member in the first direction.

[0025] In some embodiments, one of the first guide portion and the second guide portion is provided as a guide groove, and the other is provided as a guide protrusion, and the guide protrusion is movably arranged in the guide groove.

[0026] In some embodiments, the shell comprises a cover portion and a main body portion, the cover portion and the main body portion are connected and surround the accommodation cavity, the first wire hole is arranged on the cover portion, and the second wire hole is arranged on the main body portion.

[0027] In some embodiments, the elastic member has a first end and a second end opposite in the first direction, the first end abuts against the cover portion, and the second end abuts against the locking member.

[0028] In some embodiments, the locking member is provided with a flange portion, and the second end abuts against a side wall of the flange portion towards the cover portion.

[0029] In some embodiments, the shell has a shape of one of a cylinder and a prism.

[0030] Correspondingly, the application also discloses a tissue ligation device.

[0031] The locking mechanism according to any one of the above embodiments, and

[0032] A medical wire, the medical wire being arranged through the first wire hole, the accommodation cavity and the second wire hole of the locking mechanism.

[0033] In some embodiments, the medical wire comprises:

[0034] A first pull cable and a second pull cable, the first pull cable and the second pull cable being arranged through the first wire hole, the accommodation cavity and the second wire hole.

[0035] A wire ring is arranged on the side of the second wire passing hole away from the wire passing channel and is connected to the first and second pull wires.

[0036] Correspondingly, the surgical instrument for endoscope provided in the embodiments of the present application comprises the locking mechanism according to any one of the above embodiments, or comprises the tissue ligation device according to any one of the above embodiments.

[0037] Beneficial effects: the locking mechanism provided in the embodiments of the present application is used for locking a medical wire, and the locking mechanism comprises a housing having a receiving cavity, a first wire passing hole and a second wire passing hole, the first wire passing hole and the second wire passing hole are respectively communicated with the receiving cavity, and the first wire passing hole, the receiving cavity and the second wire passing hole are used for passing the medical wire; a locking member is arranged in the receiving cavity; an elastic member is arranged in the receiving cavity and is connected with the housing and the locking member respectively, and the elastic member is arranged to apply an elastic force to the locking member so that the locking member can press the medical wire on the housing. In the embodiments of the present application, the locking member and the elastic member are arranged in the receiving cavity of the housing of the locking mechanism, the elastic member can generate an elastic force due to its elastic deformation, and the elastic force is applied to the locking member to continuously press the locking member. The first wire passing hole, the second wire passing hole and the receiving cavity of the housing can be used for passing the medical wire, so that the locking member can press the medical wire passing through the receiving cavity thereof on the housing due to the elastic force of the elastic member, thereby fixing the medical wire and achieving locking of the medical wire. Moreover, since the elastic force of the elastic member is continuously applied to the locking member, the medical wire can be continuously pressed, and the situation that the medical wire is loosened due to tissue peristalsis or tissue elasticity is reduced, thereby improving the operation efficiency and the operation success rate.

[0038] The locking mechanism of any one of the above embodiments and the medical wire of the tissue ligation device provided in the embodiments of the present application. The medical wire passes through the first wire passing hole, the receiving cavity and the second wire passing hole of the locking mechanism. The tissue ligation device can comprise all the technical features and technical effects of the above locking mechanism, which will not be described here.

[0039] The surgical instrument for endoscope provided in the embodiments of the present application can comprise all the technical features and technical effects of the above locking mechanism or the above tissue ligation device, which will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0041] Figure 1 The structural schematic diagram of the locking mechanism provided in some embodiments of the present application;

[0042] Figure 2 Another perspective view of the locking mechanism provided for some embodiments of the present application;

[0043] Figure 3 A front view of the locking mechanism provided for some embodiments of the present application;

[0044] Figure 4 A perspective view of the locking mechanism provided for some embodiments of the present application; Figure 3 A cross-sectional view along the line A-A in FIG. 1;

[0045] Figure 5 A perspective view of the locking mechanism provided for some embodiments of the present application; Figure 3 A perspective view of the locking mechanism provided for some embodiments of the present application;

[0046] Figure 6 A perspective view of the locking mechanism provided for some embodiments of the present application; Figure 4 A perspective view of the locking mechanism provided for some embodiments of the present application;

[0047] Figure 7 A perspective view of the locking mechanism provided for some embodiments of the present application; Figure 6 A perspective view of the locking mechanism provided for some embodiments of the present application;

[0048] Figure 8 A perspective view of the locking mechanism provided for some embodiments of the present application;

[0049] Figure 9 A perspective view of the locking mechanism provided for some embodiments of the present application;

[0050] Figure 10 A perspective view of the locking mechanism provided for some embodiments of the present application;

[0051] Figure 11 A perspective view of the locking mechanism provided for some embodiments of the present application;

[0052] Figure 12 A perspective view of the locking mechanism provided for some embodiments of the present application;

[0053] Figure 13 A perspective view of the locking mechanism provided for some embodiments of the present application;

[0054] Figure 14 A perspective view of the locking mechanism provided for some embodiments of the present application;

[0055] Figure 15 A perspective view of the locking mechanism provided for some embodiments of the present application; Figure 14 A perspective view of the locking mechanism provided for some embodiments of the present application;

[0056] Figure 16 A perspective view of the locking mechanism provided for some embodiments of the present application;

[0057] Figure 17 is a sectional view along the line B-B in FIG. 1; Figure 16 is a sectional view along the line B-B in FIG. 1;

[0058] Figure 18 is a sectional view along the line B-B in FIG. 1;

[0059] Figure 19 is a sectional view along the line B-B in FIG. 1;

[0060] Figure 20 is a sectional view along the line B-B in FIG. 1;

[0061] Figure 21 is a sectional view along the line B-B in FIG. 1; Figure 20 is a sectional view along the line B-B in FIG. 1;

[0062] Figure 22 is a sectional view along the line B-B in FIG. 1; Figure 20 is a sectional view along the line B-B in FIG. 1;

[0063] Figure 23 is a sectional view along the line B-B in FIG. 1;

[0064] Figure 24 is a sectional view along the line B-B in FIG. 1; Figure 23 is a sectional view along the line B-B in FIG. 1;

[0065] Figure 25 is a sectional view along the line B-B in FIG. 1;

[0066] Figure 26 is a sectional view along the line B-B in FIG. 1; Figure 25 is a sectional view along the line B-B in FIG. 1;

[0067] 10 - locking mechanism; 100 - housing; 110 - accommodating cavity; 111 - tapered section; 120 - first wire passing hole; 130 - second wire passing hole; 140 - cover portion; 150 - main body portion; 160 - first inner wall; 170 - first guide portion; 200 - locking member; 210 - wire passing channel; 211 - channel opening; 220 - first outer wall; 230 - tapered portion; 240 - flange portion; 250 - second guide portion; 300 - elastic member; 310 - first end; 320 - second end; 20 - medical wire; 21 - first pull cable; 22 - second pull cable; 23 - wire loop; X - first direction; OO' - axis. DETAILED DESCRIPTION

[0068] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0069] In the description of the present application, it should be understood that the terms "proximal end" and "distal end" are with reference to the surgical operator (doctor), wherein the "proximal end" is the end of the surgical tool closer to the operator, and the "distal end" is the end farther away from the operator, that is, the end closer to the patient. The terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or instruments must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. The meaning of "a plurality of" is two or more, at least one of which can be one, two or more, unless otherwise explicitly specified. The terms "mounting", "connecting" and "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two devices or the interaction relationship between two devices, unless otherwise explicitly specified. The terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features.

[0070] In the description of the present application, the first direction is introduced to facilitate the description of the relative positional relationship between the components in the locking mechanism, and the first direction is the direction in which the elastic member exerts the elastic force on the locking member. In the drawings of the present application, the first direction X is indicated by an arrow marked X.

[0071] The locking mechanism as a medical instrument can be applied in various types of operations to lock the medical wire, ensure the smooth progress of the operation and improve the success rate of the operation. For example, the locking mechanism can be applied to lock the wire ring in the tissue ligation operation, can be applied to lock the net basket in the stone removal operation, and can be applied to lock the suture in the suturing operation. In the related art, the medical wire is directly bound by a silicone tube and the like, and when the tissue peristalsis or the tissue elastic force acts, the silicone tube will retreat, causing the originally fastened wire ring to loosen.

[0072] In view of this, the locking mechanism 10 according to the embodiments of the present application can firmly lock the medical wire 20 and can be used for various types of operations such as tissue ligation, blood vessel closure, stone extraction, and suturing.

[0073] Please refer to Figures 1 to 10 The locking mechanism 10 according to the embodiments of the present application includes a housing 100, a locking member 200, and an elastic member 300. The housing 100 is a shell structure of the locking mechanism 10, and the locking member 200 and the elastic member 300 are accommodated in the housing 100 and cooperate to lock the medical wire 20.

[0074] The housing 100 has an accommodating cavity 110, a first wire passing hole 120, and a second wire passing hole 130, and the first wire passing hole 120 and the second wire passing hole 130 are respectively communicated with the accommodating cavity 110. The accommodating cavity 110 is a space formed in the housing 100 and used to accommodate the locking member 200 and the elastic member 300, and can allow the medical wire 20 to pass therethrough. The first wire passing hole 120 and the second wire passing hole 130 are holes formed in the housing 100 and communicated with the accommodating cavity 110, and the two holes are respectively communicated with the accommodating cavity 110 to form a continuous channel. The medical wire 20 can pass into the accommodating cavity 110 from the first wire passing hole 120 and pass out of the second wire passing hole 130, or pass into the accommodating cavity 110 from the second wire passing hole 130 and pass out of the first wire passing hole 120.

[0075] The locking member 200 is arranged in the accommodating cavity 110, and the elastic member 300 is arranged in the accommodating cavity 110 and connected with the housing 100 and the locking member 200, and the elastic member 300 is arranged to apply an elastic force to the locking member 200 so that the locking member 200 can press the medical wire 20 against the housing 100. The locking member 200 is movably arranged in the accommodating cavity 110 of the housing 100, and the elastic member 300 is connected with and presses the locking member 200 so that the locking member 200 can move in the direction of the elastic force or has a tendency to move in the direction of the elastic force, thereby being able to press the medical wire 20 arranged in the accommodating cavity 110 against the housing 100 and fix the medical wire 20.

[0076] In the locking mechanism 10 of the embodiments of the present application, the locking piece 200 and the elastic piece 300 are arranged in the accommodating cavity 110 of the shell 100. The elastic piece 300 can generate an elastic force due to its elastic deformation and apply the elastic force to the locking piece 200. That is, the elastic piece 300 can be arranged in a compressed state so as to apply an elastic force to the locking piece 200 to continuously press the locking piece 200. The first wire passing hole 120, the second wire passing hole 130, and the accommodating cavity 110 of the shell 100 can be used to pass the medical wire 20, so that the locking piece 200 can press the medical wire 20 passing therethrough on the shell 100 due to the elastic force of the elastic piece 300, thereby fixing the medical wire 20 and achieving locking of the medical wire 20. Moreover, since the elastic force of the elastic piece 300 continuously acts on the locking piece 200, the medical wire 20 can be continuously pressed, and the situation that the medical wire 20 is loosened due to tissue peristalsis or tissue elasticity is reduced, thereby improving the operation efficiency and the operation success rate.

[0077] In some embodiments, a gap is formed between the peripheral side of the locking piece 200 and the cavity wall of the accommodating cavity 110, which can allow the medical wire 20 to pass through. In use, the medical wire 20 can pass through the first wire passing hole 120, the second wire passing hole 130, and the gap between the locking piece 200 and the cavity wall of the accommodating cavity 110. The elastic piece 300 applies an elastic force to the locking piece 200 to press the locking piece 200 and press the medical wire 20 in the gap, so as to press the medical wire 20 on the shell 100 to lock the medical wire 20.

[0078] In some embodiments, the locking piece 200 has a wire passing channel 210, through which the medical wire 20 can pass after entering the accommodating cavity 110. By arranging the wire passing channel 210 on the locking piece 200, the space occupied by the medical wire 20 in the accommodating cavity 110 is reduced, and the space of the accommodating cavity 110 can be appropriately reduced. On the one hand, the structure volume of the locking mechanism 10 can be reduced, so that the locking mechanism 10 can be more conveniently passed through the forceps channel of other medical instruments (such as an endoscope), thereby improving the convenience of operation. On the other hand, the space redundancy in the accommodating cavity 110 is reduced, and the locking piece 200 can be more stably assembled in the accommodating cavity 110, thereby improving the stability of the locking mechanism 10.

[0079] In some use scenarios, the locking mechanism 10 needs to lock a single medical wire 20. For example, in some suturing operations, the locking mechanism 10 is used to lock one of the suturing lines. Accordingly, the locking piece 200 of the locking mechanism 10 can be designed as a single locking piece 200, as shown in FIG. 1A. Figure 20 and Figure 21As shown, the locking member 200 can be provided with only one wire passing channel 210, and the medical wire 20 is correspondingly arranged in the wire passing channel 210. In this way, the locking member 200 does not need to be provided with multiple wire passing channels 210, which can effectively reduce the volume of the locking member 200, and further facilitate the miniaturization of the entire locking mechanism 10.

[0080] Please refer to Figure 10 、 Figure 11 and Figure 12 In some use scenarios, the locking mechanism 10 needs to lock multiple medical wires 20, or needs to lock multiple cable structures formed by a single medical wire 20. For example, when ligating a tumor or tissue in a gastrointestinal environment, the wire loop 23 formed by the medical wire 20 needs to be tightened (such as Figure 12 ), the first cable 21 and the second cable 22 of the medical wire 20 can be arranged through the wire passing channel 210. Correspondingly, the locking member 200 can be provided with multiple wire passing channels 210, and each wire passing channel 210 can be arranged with at least one medical wire 20, so that the first cable 21 can be arranged in one wire passing channel 210, and the second cable 22 can be arranged in another wire passing channel 210. In this embodiment, the locking member 200 is provided with an elastic force, which can press the medical wire 20 arranged in each wire passing channel 210 against the shell 100. Alternatively, as Figure 23 、 Figure 24 、 Figure 25 and Figure 26 , three, four or even more wire passing channels 210 can be provided according to the needs of the medical scene.

[0081] Please refer to Figure 10 、 Figure 11 and Figure 12In some embodiments, the elastic member 300 is arranged to apply an elastic force to the locking member 200 along the first direction X, so as to enable the locking member 200 to press the medical wire 20 against the first inner wall 160 of the housing 100. The first inner wall 160 is a part of the cavity wall of the accommodating cavity 110. The wire passing channel 210 has a channel opening 211 which is formed on the side of the locking member 200 away from the elastic member 300, and at least a part of the channel opening 211 is formed towards the first inner wall 160 along the first direction X. That is, the locking member 200 is subjected to the elastic force of the elastic member 300 along the first direction X, and is capable of moving along the first direction X or has a tendency to move along the first direction X. When the medical wire 20 is not threaded, the elastic member 300 is capable of pressing the locking member 200 against the first inner wall 160, so that the part of the channel opening 211 towards the first inner wall 160 is closed by the first inner wall 160; after the medical wire 20 is threaded, the medical wire 20 on the side of the channel opening 211 towards the first inner wall 160 is capable of being pressed against the first inner wall 160 by the locking member 200, so as to be squeezed by the locking member 200 and the first inner wall 160 together and firmly fixed.

[0082] Optionally, the channel opening 211 can be completely formed towards the first inner wall 160 along the first direction X, that is, the edge profile of the channel opening 211 is capable of being translated or projected along the first direction X and falling on the first inner wall 160. The channel opening 211 can also be only partially formed towards the first inner wall 160, and the size of the part of the channel opening 211 opposite to the first inner wall 160 can be specifically arranged according to the thickness of the medical wire 20. The thicker the medical wire 20 is, the smaller the part opposite to the first inner wall 160 can be arranged to be, and the thinner the medical wire 20 is, the larger the part opposite to the first inner wall 160 can be arranged to be. When the locking member 200 is subjected to the elastic force of the elastic member 300 and moves to the position closest to the first inner wall 160 (that is, the boundary position in the activity space of the locking member 200 along the first direction X in the accommodating cavity 110), the distance between the edge profile of the channel opening 211 and the first inner wall 160 is smaller than the diameter of the medical wire 20, so as to realize the squeezing and fixing of the medical wire 20.

[0083] Please refer to Figure 5 , Figure 8 , Figure 10 and Figure 11In some embodiments, the locking member 200 includes a first outer wall 220 facing away from the elastic member 300 and opposite to the first inner wall 160. A channel opening 211 is disposed on the first outer wall 220. Both the first outer wall 220 and the first inner wall 160 are inclined relative to the first direction X. By configuring the opposing first outer wall 220 and the first inner wall 160 as inclined relative to the first direction X, the area of ​​the opposing portions of the first outer wall 220 and the first inner wall 160 can be increased within a limited space. This results in a larger contact area and greater friction when the medical wire 20 is compressed, thereby improving the locking effect.

[0084] In some embodiments, the second wire passage 130 is located on the side of the locking member 200 away from the elastic member 300, and the first inner wall 160 is connected to the end of the hole wall of the second wire passage 130 near the locking member 200. The first inner wall 160 can extend obliquely from the end of the hole wall of the second wire passage 130 near the locking member 200 in a direction away from the second wire passage 130 and closer to the elastic member 300. When the medical wire 20 is tensioned from the outside of the second wire passage 130, the friction between the medical wire 20 and the first inner wall 160 and the first outer wall 220 can pull the first outer wall 220 toward the first inner wall 160, further increasing the squeezing force and friction of the first inner wall 160 and the first outer wall 220 on the medical wire 20. Therefore, the greater the force on the medical wire 20 near the outside of the second wire passage 130, the greater the locking force of the locking mechanism 10 on the medical wire 20, which is more conducive to improving the stability of locking. When the medical wire 20 is tensioned in the opposite direction outside the first wire hole 120, the force exerted by the medical wire 20 on the locking member 200 is approximately opposite to the elastic force exerted by the elastic member 300. When the tensioning force is greater than the elastic force, the locking member 200 will be pushed by the medical wire 20 to move in the opposite direction of the first direction X, thereby moving the locking member 200 away from the first inner wall 160 and allowing the medical wire 20 to move.

[0085] With the above configuration, the locking mechanism 10 can achieve unidirectional locking, thus enabling it to be used as a ligation ring in ligation surgery. Figure 11 When the loop 23 is subjected to the force generated by the peristalsis or elasticity of the tissue, it can tension the first cable 21 and the second cable 22. The first cable 21 and the second cable 22 can further pull the locking member 200 closer, making the lock more secure and reducing the chance of loosening. The doctor can then tension the first cable 21 and / or the second cable 22 to move the locking member 200 toward the elastic member 300, compress the elastic member 300, and reduce the compressive force on the first cable 21 and the second cable 22, thereby reducing the size of the loop 23.

[0086] In some embodiments, the locking member 200 is subjected to the elastic force of the elastic member 300, and the end of the locking member 200 away from the elastic member 300 can extend into the second wire passing hole 130 to occupy the internal space of the second wire passing hole 130, so as to press the medical wire 20 against the hole wall of the second wire passing hole 130, thereby improving the locking effect. In particular, when the locking mechanism 10 is used for a ligature ring in a ligature operation, when the wire ring 23 is subjected to the force generated by the peristalsis or elasticity of the tissue, the first pull rope 21 and the second pull rope 22 can be stretched, and the first pull rope 21 and the second pull rope 22 can further pull the locking member 200 into the second wire passing hole 130, so as to make the locking more firm. The doctor reversely stretches the first pull rope 21 and / or the second pull rope 22, so as to move the locking member 200 towards the elastic member 300, and the locking member 200 can be separated from the second wire passing hole 130 and further away from the first inner wall 160, so as to reduce the pressing force on the first pull rope 21 and the second pull rope 22, and thus the wire ring 23 can be reduced.

[0087] Please refer to Figure 11 In some embodiments, the shell 100 has a plurality of second wire passing holes 130, and the number of the second wire passing holes 130 is consistent with the number of the wire passing channels 210, each second wire passing hole 130 corresponds to a wire passing channel 210, and the corresponding second wire passing hole 130 and the wire passing channel 210 are used for threading the same medical wire 20, that is, the same medical wire 20 can pass through the corresponding second wire passing hole 130 and the wire passing channel 210 in sequence.

[0088] Please refer to Figure 10 and Figure 15 In some embodiments, the accommodation cavity 110 has a tapered section 111, the first inner wall 160 surrounds the tapered section 111, and the size L1 of the tapered section 111 gradually decreases along the first direction X; the locking member 200 comprises a tapered portion 230, at least part of the tapered portion 230 is located in the tapered section 111, the size L2 of the tapered portion 230 gradually decreases along the first direction X, and the first outer wall 220 is arranged on the tapered portion 230. By arranging the tapered section 111 in the accommodation cavity 110 and arranging the tapered portion 230 of the locking member 200 corresponding to the tapered section 111, the tapered portion 230 of the locking member 200 can cooperate more compactly with the first inner wall 160 surrounding the tapered section 111 under the elastic force of the elastic member 300, so as to more stably lock the medical wire 20. Moreover, when the medical wire 20 is subjected to a stretching force in the opposite direction of the elastic force, the locking member 200 can also more smoothly retreat, release the medical wire 20, and restore the one-way movement of the medical wire 20.

[0089] When the medical wire 20 is subjected to a stretching force in the distal direction, the friction force F exerted by the medical wire 20 on the locking member 200 is substantially as follows Figure 22The friction force F has a component f in the first direction X, which can pull the locking member 200 in the distal direction, so that the first outer wall 220 of the locking member 200 is closer to the first inner wall 160 of the housing 100, and the first outer wall 220 and the first inner wall 160 press the medical wire 20 more tightly, making it more difficult to loosen, and more stably locking the medical wire 20.

[0090] Please refer to Figure 11 In some embodiments, the first outer wall 220 has an angle a with the first direction X, and the part of the first inner wall 160 opposite to the first outer wall 220 has an angle β with the first direction X, and β≥a. That is, the part of the first inner wall 160 opposite to the first outer wall 220 has a larger inclination, so that the distance between the first outer wall 220 and the first inner wall 160 changes, and the closer to the second wire hole 130, the smaller the distance, so that the medical wire 20 can be clamped more tightly, and the locking effect is improved.

[0091] Please refer to Figure 12 In some embodiments, the first inner wall 160 can be substantially perpendicular to the first direction X, and the channel opening 211 is arranged on the front end surface of the locking member 200 away from the elastic member 300, which is the first outer wall 220. The elastic member 300 presses the locking member 200, so that the gap between the first outer wall 220 and the first inner wall 160 is smaller than the diameter of the medical wire 20, so that the first outer wall 220 and the first inner wall 160 can clamp the medical wire 20 and lock it.

[0092] In some embodiments, the wire passage 210 extends in a straight line in the first direction X, which is easy to manufacture, and can reduce the volume of the locking member 200, thereby facilitating the miniaturization of the entire locking mechanism 10, and facilitating medical applications, especially easy to be sent into the human body through the forceps channel of the endoscope, and convenient for doctors to operate.

[0093] Please refer to Figure 4In some embodiments, the first wire passing hole 120, the wire passing channel 210 and the second wire passing hole 130 are arranged in sequence in the first direction X, the second wire passing hole 130 has an axis OO' extending in the first direction X, and the plurality of wire passing channels 210 are arranged on the periphery of the axis OO'. In the present embodiment, the locking mechanism 10 can be provided with one second wire passing hole 130 and a plurality of wire passing channels 210, and the central axis of each wire passing channel 210 is non-coaxial with the axis OO' of the second wire passing hole 130. This arrangement causes the medical wire 20 to be arranged in a staggered manner in the wire passing channel 210 and the second wire passing hole 130, so that the locking member 200 is more easily able to press the medical wire 20 against the first inner wall 160 on both sides of the second wire passing hole 130. In addition, by arranging the plurality of wire passing channels 210 on the periphery of the axis OO', the wire passing channels 210 can be prevented from interfering with each other, thereby improving the rationality of the arrangement of the wire passing channels 210 on the locking member 200.

[0094] Referring again to Figure 4 In some embodiments, the first wire passing hole 120, the accommodation cavity 110 and the second wire passing hole 130 are coaxially arranged in the first direction X, which is more convenient for threading the medical wire 20 and for use by a doctor.

[0095] Referring again to Figures 13 to 17 In some embodiments, the housing 100 is provided with a first guide portion 170, and the locking member 200 is provided with a second guide portion 250 that is adapted to the first guide portion 170, and the second guide portion 250 is in guiding cooperation with the first guide portion 170 to guide the locking member 200 in the first direction X. Through the guiding action of the first guide portion 170 and the second guide portion 250, when the locking member 200 is moved under force in the accommodation cavity 110, it can be stably moved in the first direction X, thereby improving the stability of the locking mechanism 10 in locking the medical wire 20.

[0096] Alternatively, one of the first guide portion 170 and the second guide portion 250 is provided as a guide groove, and the other is provided as a guide protrusion that is movably arranged in the guide groove. For example, in the embodiment shown in Figure 13 , the first guide portion 170 is a guide groove that is formed on the housing 100 and extends in the first direction X and communicates with the accommodation cavity 110. As shown in Figure 13 , the guide groove can extend through the housing 100 in the thickness direction of the housing 100, or it can be formed on the side of the housing 100 facing the accommodation cavity 110 without extending through the housing 100. The second guide portion 250 is a guide protrusion that is protrudingly arranged on the locking member 200, the guide protrusion is arranged in the guide groove and can move along the guide groove. As shown in Figure 17When the locking member 200 is moved by the elastic force of the elastic member 300 or the tension force of the medical wire 20, the locking member 200 can be stably moved in the first direction X. For example, the first guide portion 170 can be a guide protrusion which protrudes towards the accommodating cavity 110 on the inner wall of the shell 100. The second guide portion 250 is a guide groove which is arranged on the locking member 200 and extends in the first direction X. By cooperating with the guide protrusion, the locking member 200 can be stably moved in the first direction X.

[0097] Please refer to Figure 2 、 Figure 3 、 Figure 4 、 Figure 18 and Figure 19 In some embodiments, the shell 100 includes a cover portion 140 and a main body portion 150 which are connected and surround the accommodating cavity 110. The first wire passing hole 120 is arranged on the cover portion 140, and the second wire passing hole 130 is arranged on the main body portion 150. By arranging the shell 100 in a split structure including the cover portion 140 and the main body portion 150, the assembly of the locking mechanism 10 can be facilitated, and the replacement and maintenance of the accessories can be facilitated.

[0098] Optionally, the elastic member 300 has a first end 310 and a second end 320 which are opposite in the first direction X. The first end 310 abuts against the cover portion 140, and the second end 320 abuts against the locking member 200. Thus, the elastic member 300 can apply an elastic force to the locking member 200 in the first direction X. The elastic member 300 can be a spring or other structure with elasticity.

[0099] Please refer to Figure 8 In some embodiments, the locking member 200 is provided with a flange portion 240, and the second end 320 abuts against the flange portion 240 towards the side wall of the cover portion 140. By arranging the flange portion 240, the connection and assembly of the elastic member 300 and the locking member 200 can be facilitated. The flange portion 240 can be in contact with the inner wall of the shell 100 for guidance, and the stability of the movement of the locking member 200 in the accommodating cavity 110 can be improved. Optionally, the second guide portion 250 can be protrudingly arranged on the flange portion 240.

[0100] Optionally, the shell 100 has one of a cylindrical shape and a prismatic shape, or the shell 100 can have an irregular shape. The actual medical scene requirements can be selected.

[0101] Correspondingly, the application also provides a tissue ligation device which can be used in the surgery of tumor, tissue ligation, blood vessel closure and the like in a gastrointestinal environment. Please refer to Figure 10 、 Figure 11 andFigure 12 The tissue ligation device includes the locking mechanism 10 of any of the above embodiments and a medical wire 20, which can be one or more strands of nylon wire, metal wire or other medical material wire. The medical wire 20 is threaded through the first wire hole 120, the accommodating cavity 110 and the second wire hole 130 of the locking mechanism 10.

[0102] It can be understood that the tissue ligation device can include all the technical features and technical effects of the above locking mechanism 10, which will not be described here.

[0103] Please refer to Figure 11 and Figure 12 again. The medical wire 20 includes a first pull cable 21, a second pull cable 22 and a wire ring 23. The first pull cable 21 and the second pull cable 22 are both threaded through the first wire hole 120, the accommodating cavity 110 and the second wire hole 130. The wire ring 23 is arranged on the side of the second wire hole 130 away from the wire passage 210 and is connected to the first pull cable 21 and the second pull cable 22. When the medical wire 20 is inversely tensioned outside the first wire hole 120, the force exerted by the medical wire 20 on the locking piece 200 is approximately opposite to the elastic force exerted by the elastic piece 300. When the tensioning force is greater than the elastic force, the locking piece 200 will be pushed by the medical wire 20 to move in the opposite direction of the first direction X, so that the locking piece 200 moves away from the first inner wall 160, and the medical wire 20 can move unidirectionally. The doctor can pull the first pull cable 21 and / or the second pull cable 22 to reduce the wire ring 23, thereby tightening the tissue or tumor.

[0104] Specifically, a plurality of wire passages 210 can be arranged on the locking piece 200. The first pull cable 21 is threaded through one wire passage 210, and the second pull cable 22 is threaded through another wire passage 210, so as to avoid mutual interference and facilitate operation.

[0105] It should be further noted that the tissue ligation device can also include an operating handle or the like structure for operating the above first pull cable 21 and / or the second pull cable 22.

[0106] Correspondingly, a surgical instrument for endoscopy includes the locking mechanism 10 of any of the above embodiments or the tissue ligation device of any of the above embodiments. Thus, the surgical instrument for endoscopy can include all the technical features and technical effects of the above locking mechanism 10 or the above tissue ligation device, which will not be described here.

[0107] In the above embodiments, the description of each embodiment focuses on different aspects. The parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0108] The locking mechanism, the tissue ligature device, and the surgical instrument for endoscope provided by the embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by using specific examples. The above embodiment descriptions are only used to help understand the technical solutions of the present application and the core ideas thereof. It should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features thereof can be replaced equivalently; and the modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A locking mechanism, characterized in that, The locking mechanism is used to secure medical wiring and includes: The housing has a receiving cavity, a first wire passage hole and a second wire passage hole, the first wire passage hole and the second wire passage hole are respectively connected to the receiving cavity, and the first wire passage hole, the receiving cavity and the second wire passage hole are used to pass through the medical wire; A locking element is disposed in the receiving cavity; An elastic element is disposed in the receiving cavity and connected to the housing and the locking element respectively. The elastic element is configured to apply an elastic force to the locking element so that the locking element can press the medical wire onto the housing.

2. The locking mechanism according to claim 1, characterized in that, The first wire-passing hole, the receiving cavity, and the second wire-passing hole are arranged sequentially in a first direction; The locking member has a wire passage extending in the first direction for threading the medical wire.

3. The locking mechanism according to claim 2, characterized in that, The locking member has multiple wire passages, and the locking member is configured to be subjected to the elastic force to press the medical wires passing through each wire passage onto the housing.

4. The locking mechanism according to claim 2 or 3, characterized in that, The elastic element is configured to apply an elastic force along the first direction to the locking element, so that the locking element can press the medical wire against the first inner wall of the housing; The wire passage has a channel opening, which is located on the side of the locking member away from the elastic member. In the first direction, at least a portion of the channel opening is oriented toward the first inner wall.

5. The locking mechanism according to claim 4, characterized in that, The locking member includes a first outer wall facing away from the elastic member and opposite to the first inner wall, the channel opening is disposed on the first outer wall, and both the first outer wall and the first inner wall are inclined in the first direction.

6. The locking mechanism according to claim 5, characterized in that, The second wire hole is located on the side of the locking member away from the elastic member; The first inner wall is disposed on the side of the second wire hole wall near the locking member and is connected to the hole wall. The first inner wall extends obliquely away from the second wire hole and closer to the elastic member.

7. The locking mechanism according to claim 6, characterized in that, The locking member is configured to be subjected to the elastic force, and the end of the locking member away from the elastic member can at least partially extend into the second wire hole.

8. The locking mechanism according to claim 3, characterized in that, The housing has a plurality of second wire-passing holes, and the number of second wire-passing holes is the same as the number of wire-passing channels.

9. The locking mechanism according to claim 5, characterized in that, The receiving cavity has a tapering section, which is surrounded by the first inner wall, and the size L1 of the tapering section gradually decreases along the first direction; The locking member includes a tapered portion, at least a portion of which is located within the tapered section. Along the first direction, the size L2 of the tapered portion gradually decreases, and the first outer wall is disposed on the tapered portion.

10. The locking mechanism according to claim 5, characterized in that, The angle between the first outer wall and the first direction is α, and the angle between the portion of the first inner wall opposite to the first outer wall and the first direction is β, satisfying β≥α.

11. The locking mechanism according to claim 4, characterized in that, The cable passage extends in a straight line in the first direction.

12. The locking mechanism according to claim 4, characterized in that, The first wire guide hole, the wire guide channel, and the second wire guide hole are arranged sequentially in the first direction. The second wire guide hole has an axis extending along the first direction, and a plurality of wire guide channels are arranged around the axis.

13. The locking mechanism according to claim 12, characterized in that, The first wire through hole, the receiving cavity, and the second wire through hole are arranged coaxially in the first direction.

14. The locking mechanism according to claim 1, characterized in that, The housing is provided with a first guide portion, and the locking member is provided with a second guide portion adapted to the first guide portion. The second guide portion guides and cooperates with the first guide portion to guide the locking member in a first direction.

15. The locking mechanism according to claim 14, characterized in that, Of the first guide portion and the second guide portion, one is configured as a guide groove and the other is configured as a guide protrusion, wherein the guide protrusion is movably disposed within the guide groove.

16. The locking mechanism according to claim 1, characterized in that, The housing includes a cover portion and a main body portion, the cover portion and the main body portion are connected and form the receiving cavity, the first wire passage hole is disposed in the cover portion, and the second wire passage hole is disposed in the main body portion.

17. The locking mechanism according to claim 16, characterized in that, The elastic member has a first end and a second end opposite to each other along a first direction, the first end abutting against the cover portion and the second end abutting against the locking member.

18. The locking mechanism according to claim 17, characterized in that, The locking member has a flange portion, and the second end abuts against the side wall of the flange portion facing the cover portion.

19. The locking mechanism according to claim 1, characterized in that, The shell is either cylindrical or prismatic in shape.

20. A tissue ligation device, characterized in that, include: The locking mechanism as described in any one of claims 1 to 19, and, A medical wire, wherein the medical wire is inserted through the first wire hole, the receiving cavity, and the second wire hole of the locking mechanism.

21. The tissue ligation device according to claim 20, characterized in that, The medical filaments include: A first cable and a second cable, both of which pass through the first wire hole, the receiving cavity, and the second wire hole; A loop is disposed on the side of the second wire hole away from the receiving cavity and connects the first cable and the second cable.

22. An endoscopic surgical instrument, characterized in that, It includes the locking mechanism as described in any one of claims 1 to 19, or the tissue ligation device as described in claim 20 or 21.

Images