A meniscal suture device

Abstract

The application discloses a meniscus suture device which comprises an axis extending in an extending direction, and comprises a puncture needle, a pushing needle and a handle; the pushing needle is coaxially arranged with the puncture needle and movably arranged in the puncture needle; the handle is internally provided with a pushing assembly and a rotating assembly; the pushing assembly is arranged on one side of the rotating assembly close to the proximal end; the pushing assembly is connected with the pushing needle to push the pushing needle to move in the extending direction; the rotating assembly is connected with the puncture needle to realize rotation of the puncture needle by the extending direction as an axis by a preset angle. The application realizes rotation of the puncture needle by the preset angle by the rotating assembly, solves the problem that the puncture needle of the current meniscus suture device cannot rotate left and right, and simultaneously, the rotating assembly can be adopted to accurately control the rotation angle of the puncture needle, and the puncture range of the distal end of the puncture needle is expanded.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, and in particular relates to a meniscus suture device. Background Technology

[0002] As the public's awareness of sports and health grows, people are exercising more, leading to a surge in sports-related injuries. Meniscus tears, particularly in knee injuries, are common in activities that primarily involve leg movements, such as running, cycling, and skiing. Modern meniscus repair surgery largely utilizes arthroscopic techniques to minimize surgical incisions for patients.

[0003] A meniscus suture device is used in surgical treatment of meniscus injuries to implant an appendage into the damaged area of ​​the meniscus for suturing and repair. During the use of the meniscus suture device, a puncture needle is needed to puncture the meniscus. Currently available meniscus suture devices primarily use curved, straight, and reverse-curved needles. However, the curved and reverse-curved types refer to those with a fixed bending angle that cannot be rotated left or right. Because the location of meniscus injuries varies slightly from patient to patient, and meniscus suturing surgery is mostly performed arthroscopically in a confined space, the distal end of the puncture needle may not accurately reach the puncture site. In such cases, manual rotation of the meniscus suture device is often used. However, manual rotation can damage the distal end of the puncture needle and result in inaccurate rotation angles. Summary of the Invention

[0004] To address the above technical problems, this invention provides a meniscus suture device with a rotating component inside the handle. The rotating component can drive the puncture needle to rotate around the axis of the puncture needle by a preset angle, solving the problem that the puncture needle of current meniscus suture devices cannot rotate left or right. At the same time, the use of the rotating component can precisely control the rotation angle of the puncture needle, expanding the puncture range of the distal end of the puncture needle.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: A meniscus suture device includes an axis extending in a direction of extension, defining opposite ends of the meniscus suture device as proximal and distal ends in the direction of extension, the meniscus suture device comprising: Puncture needle; A push needle, which is coaxially arranged with the puncture needle and is movably inserted inside the puncture needle; The handle includes a pushing component and a rotating component. The pushing component is located on the side of the rotating component near the proximal end. The pushing component is connected to the push needle to push the push needle to move along the extension direction. The rotating component is connected to the puncture needle to enable the puncture needle to rotate around the extension direction by a preset angle, thereby increasing the puncture range of the distal end of the puncture needle.

[0006] In a preferred embodiment of the present invention, the rotating assembly includes a first force-applying part driven by finger thrust and a first transmission unit connected to the first force-applying part, wherein the first force-applying part reciprocates along the extending direction. The first transmission unit is located inside the handle and connected to the proximal end of the puncture needle. The first transmission unit is used to convert the linear reciprocating motion of the first force application part into the rotational motion of the puncture needle.

[0007] In a preferred embodiment of the present invention, the first transmission unit is a screw adjustment mechanism, which includes a rotating wheel and a lever. The rotating wheel is rotatably disposed inside the handle, and the puncture needle is fixedly connected to the rotating wheel and coaxially disposed with the rotating wheel. The rotating wheel has a spiral groove on its circumferential side. One end of the lever is connected to the first force-applying part, and the other end is embedded in the spiral groove. The end of the lever embedded in the spiral groove slides within the spiral groove. Pushing the first force-applying part causes the lever to drive the rotating wheel to rotate by a preset angle, which in turn drives the puncture needle to rotate by a preset angle.

[0008] In a preferred embodiment of the present invention, in order to restrict the first force-applying part to only make linear reciprocating motion along the extension direction, a strip groove is provided on the handle to restrict the movement of the first force-applying part. Specifically, the handle has a first strip groove along the extension direction, the first strip groove extends towards the rotating wheel and has a stepped groove and a second strip groove, the first force-applying part includes a first push button and a first limiting plate embedded in the stepped groove, the first push button is connected to the first limiting plate through a connecting rod, the connecting rod is located in the first strip groove, the lever is located in the second strip groove, and the end of the lever away from the rotating wheel passes through the first limiting plate.

[0009] In a preferred embodiment of the present invention, the rotating assembly further includes a locking structure for locking the sliding of the first force-applying part. In the locked state, the first force-applying part and the handle are locked together, and the two cannot move relative to each other. In the unlocked state, pushing the first force-applying part causes the first force-applying part to move the lever. The lever slides in the spiral groove, thereby driving the rotating wheel to rotate, which in turn drives the puncture needle to rotate about the extension direction as an axis.

[0010] In a preferred embodiment of the present invention, the locking structure includes a first elastic element and a serrated engagement structure, wherein the first elastic element is sleeved on the lever; The sawtooth meshing structure includes a first sawtooth and a second sawtooth that meshes with the first sawtooth. Along the extending direction, the first sawtooth is provided on the inner walls of both sides of the stepped groove, and the side of the first limiting plate that cooperates with the inner walls of both sides of the stepped groove is provided as the second sawtooth. In the initial state, the locking structure is in a locked state, the elastic element is in a compressed state, and under the action of elastic force, one end of the elastic element abuts against the first limiting plate, and the other end abuts against the side of the second strip groove. The first side of the first limiting plate abuts against the first step surface of the stepped groove, and the first and second saw teeth mesh. At this time, the first push button does not contact the handle. Pressing the first push button causes the second side of the first limiting plate to abut against the second step surface of the stepped groove, disengaging the first saw tooth from the groove of the second saw tooth and unlocking the locking structure. At this point, pushing the first push button will allow the first push button to move along the handle.

[0011] During the movement of the lever driven by the first force-applying part, the moving lever drives the rotating wheel to rotate. Since the lever is always suspended in the stepped groove and the second strip groove, and one end is embedded in the spiral groove, in order to prevent the lever from bending during the movement, a guide part is provided on the part of the lever near the rotating wheel. That is, the rotating assembly also includes a guide part. The guide part includes an I-shaped guide part composed of a first guide plate, a second guide plate and a guide column. The end of the lever away from the first force-applying part passes through the first elastic member, the first guide plate, the guide column and the second guide plate in sequence. The end of the first elastic member away from the first force-applying part abuts against the first guide plate. The second strip groove extends in the direction of the rotating wheel and has a third strip groove. The I-shaped limiting part is embedded in the third strip groove to prevent the lever from bending.

[0012] In a preferred embodiment of the present invention, the first push button is provided with a strip-shaped first anti-slip protrusion on its outer side, which is used to better exert force when the finger presses the first push button and plays an anti-slip role.

[0013] In a preferred embodiment of the present invention, the pushing component includes a second force-applying part driven by finger pushing force. The second force-applying part is fixedly connected to the proximal end of the push needle. The second force-applying part reciprocates along the extension direction to push the push needle to move along the extension direction.

[0014] In a preferred embodiment of the present invention, the second force-applying part includes a second push button and a push plate, the second push button being connected to the push plate, and the push plate being fixedly connected to the proximal end of the push needle.

[0015] To prevent the push plate from reciprocating in a straight line, a slide rail is provided inside the handle along the extension direction, and the push plate is slidably connected to the slide rail to ensure that the push plate moves in a straight line along the extension direction.

[0016] In a preferred embodiment of the present invention, the pushing component further includes a second limiting plate, the second limiting plate being used to restrict the movement of the push plate of the second implementation part, the second limiting plate moving along a direction perpendicular to the extension direction; During the movement of the push plate along the extension direction, the second limiting plate restricts the movement of the push plate, pushes the push plate back to the initial position, and then pushes the second push button again, while moving the second limiting plate a preset distance. The push plate can then move past the second limiting plate along the extension direction during the second movement.

[0017] The second limiting plate is used to realize the two movements of the push plate, which separates the two movements and ensures the independence and accuracy of the two movements of the push plate.

[0018] In a preferred embodiment of the present invention, in a horizontal plane, in a direction perpendicular to the extension direction, a slot is provided inside the handle, and a second limiting plate is engaged in the slot. The second limiting plate moves along the slot in a direction perpendicular to the extension direction.

[0019] In a preferred embodiment of the present invention, a button is provided on the outer side of the handle for driving the second limiting plate to move with a finger. When the finger presses the button, the second limiting plate moves in a direction perpendicular to the extension direction, causing the push plate to continue moving to the distal end.

[0020] In a preferred embodiment of the present invention, a second elastic element is further provided inside the handle, one end of the second elastic element is fixed to the inner wall of the handle, and the other end is fixed to the push plate of the second force-applying part.

[0021] In a preferred embodiment of the present invention, a strip-shaped second anti-slip protrusion is provided on the outside of the second push button, which is used to better exert force when the finger presses the second push button and plays an anti-slip role.

[0022] Because the present invention adopts the above technical solution, it has the following advantages and positive effects compared with the prior art: The meniscus suture device of the present invention includes a puncture needle, a pusher needle, and a handle. The pusher needle is movably inserted through the puncture needle. The proximal ends of the puncture needle and the pusher needle are located inside the handle. A rotating component and a pushing component are disposed inside the handle. The rotating component is connected to the puncture needle and drives the puncture needle to rotate about its extension direction as an axis. The pushing component is connected to the pusher needle and drives the pusher needle to move along its extension direction. The present invention utilizes the rotating component to realize the rotation of the puncture needle about its axis. Compared with the existing hand-operated rotating handle that drives the puncture needle to rotate, the rotation angle of the puncture needle can be controlled more precisely. Especially for arthroscopic minimally invasive surgery, where the operating space is small, precise control of the rotation angle of the puncture needle will not cause damage to the distal end of the puncture needle. At the same time, for curved or reverse-curved puncture needles, the puncture needle can be rotated left and right by a preset angle, which can increase the puncture range of the puncture needle and make it easier to puncture to the preset position.

[0023] In a preferred embodiment of the present invention, the rotating assembly has a first push button on the outside of the handle, and internally uses a lever and a rotating wheel for transmission. Simply pushing the first push button towards the distal or proximal end can achieve counterclockwise or clockwise rotation of the hollow needle, making it convenient to operate and highly practical. Furthermore, a locking structure is provided. When the locking structure is in the locked state, the first push button and the handle cannot move relative to each other, and the puncture needle is also locked. When an external force is applied to the first push button, the locking structure can be unlocked, allowing the first push button to slide relative to the handle. At this time, the hollow needle can rotate left and right, achieving rotational control of the hollow needle.

[0024] During meniscus suture surgery, after the puncture needle penetrates the meniscus, it needs to be pushed out to expel the implant. This process requires two separate pushes. In a preferred embodiment of this invention, a second limiting plate is provided during the movement of the pushing needle along its extension direction. When the second limiting plate is in its initial position, the second force-applying part can only move to the position where it contacts the second limiting plate. The second force-applying part cannot move further due to the obstruction of the second limiting plate, thus stopping the pushing needle's movement. At this point, the second limiting plate is moved in a direction perpendicular to the axis, allowing the second force-applying part to continue moving through the second limiting plate. Therefore, the existence of the limiting plate separates the two axial movements of the pushing needle, ensuring the independence and accuracy of the two movements. The first axial movement of the pushing needle expels the first implant. After passing the second limiting plate, the pushing needle is pushed out again to expel the second implant. The second limiting plate prevents the pushing needle from expelling the entire implant in a single axial movement. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the meniscus suture device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the handle of the meniscus suture device according to an embodiment of the present invention. Figure 1 ; Figure 3This is a schematic diagram of the handle of the meniscus suture device according to an embodiment of the present invention. Figure 2 ; Figure 4 This is a schematic diagram of the second housing of the handle of the meniscus suture device according to an embodiment of the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the second housing of the handle of the meniscus suture device according to an embodiment of the present invention. Figure 2 ; Figure 6 This is a schematic diagram of the first cross-section of the meniscus suture device according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the rotating assembly of the meniscus suture device according to an embodiment of the present invention; Figure 8 A schematic diagram of the second cross-section of the meniscus suture device according to an embodiment of the present invention. Figure 1 ; Figure 9 A schematic diagram of the second cross-section of the meniscus suture device according to an embodiment of the present invention. Figure 2 .

[0026] Explanation of reference numerals in the attached drawings: 1-Puncture needle; 2-Push needle; 3-Handle; 301-First housing; 3011-First sliding surface; 3012-Second sliding surface; 302-Second housing; 4-Rotating assembly; 401-First force application part; 4011-First push button; 40111-First anti-slip protrusion; 4012-First limiting plate; 40121-First side; 40122-Second side; 4013-Connecting rod; 402-Lever; 4021-Ball end; 403-Rotating wheel; 4031-Helical groove; 406-Guide part; 4061-First guide plate; 4 062-Guide cylinder; 4063-Second guide plate; 407-First elastic element; 408-First serration; 409-Second serration; 5-Push assembly; 501-Second force application part; 5011-Second push button; 50111-Second anti-slip protrusion; 5012-Push plate; 502-Second elastic element; 503-Second limiting plate; 504-Card slot; 505-Button; 506-Slide rail; 6-First strip groove; 7-Step groove; 701-First step surface; 702-Second step surface; 8-Second strip groove; 801-Side side of the second strip groove; 9-Third strip groove. Detailed Implementation

[0027] During exercise, improper movements or excessive force can cause uneven stress on the femur and tibia at the knee joint, leading to a deviation in the force exerted by the femur on the meniscus. This can easily cause a tear in the meniscus. The advent of arthroscopic meniscus repair devices allows for minimally invasive suturing of the torn portion to the existing meniscus under arthroscopic guidance, thereby restoring knee joint function.

[0028] For example, when there is a tear in the posterior horn of the meniscus, the surgeon uses the puncture needle of the meniscus suture device to first puncture one side of the meniscus tear, and then pushes out the first implant to attach to the posterior wall of the meniscus. After the first implant is successfully attached, the puncture needle is removed and punctures the other side of the meniscus tear again, and the second implant is pushed out. Similarly, the second implant is attached to the posterior wall of the meniscus. Finally, the suture is tightened to secure the two implants and complete the meniscus suture.

[0029] However, during the surgical procedure, the puncture needle may not accurately reach the preset puncture position. For curved or reverse-curved puncture needles, a slight rotation of the needle can bring it to the preset puncture position. Furthermore, the meniscus is a type of cartilage tissue that is quite tough, requiring considerable force from the surgeon when puncturing it. In actual surgery, to successfully puncture the meniscus, the puncture needle is usually rotated by hand using a meniscus suture device. However, rotating the meniscus suture device by hand cannot precisely control the rotation angle of the puncture needle and can easily lead to damage to the distal end of the needle.

[0030] Therefore, this invention proposes a meniscus suture device that enables precise control of the rotation of the puncture needle. The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a further detailed description of the meniscus suture device proposed by this invention. The advantages and features of the invention will become clearer from the following description. It should be noted that the described embodiments are only some, not all, of the embodiments of the invention. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0032] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element 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 invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0035] In the description of this application, "proximal end" refers to the end closer to the operator, and "distal end" refers to the end farther away from the operator.

[0036] A meniscus suture device has an axis extending in a forward direction. The two ends of the suture device in the forward direction are defined as proximal and distal. The suture device includes a puncture needle 1, a pusher needle 2, and a handle 3. The puncture needle 1 is used to puncture meniscus tissue, and the pusher needle 2 is used to push out the implant. The proximal ends of the puncture needle 1 and the pusher needle 2 are located within the handle 3. The center lines of the puncture needle 1, the pusher needle 2, and the handle 3 coincide with the axis of the meniscus suture device. During use, the surgeon holds the handle 3 to operate the suture device. The handle 3 is designed to conform to the structure of human joints, making it more suitable for hand grip and more ergonomic, providing a comfortable feel for the surgeon.

[0037] The distal end of the puncture needle 1 is used to puncture the meniscus. The distal end of the puncture needle 1 can be straight or curved in the form of the present embodiment, i.e., a curved or reverse-curved puncture needle 1. The puncture needle 1 is a hollow needle with an axial cavity. The push needle 2 is movably inserted into the cavity inside the puncture needle 1. The implant for meniscus suture is also housed in the cavity of the puncture needle 1.

[0038] The handle 3 has a cavity, and a pushing component 5 and a rotating component 4 are provided in the cavity of the handle 3. The pushing component 5 is located on the side of the rotating component 4 near the proximal end. The pushing component 5 is connected to the push needle 2 to push the push needle 2 to move along the extension direction. The rotating component 4 is connected to the puncture needle 1 to realize the puncture needle 1 to rotate a preset angle around the extension direction as an axis.

[0039] The rotating component 4 enables the rotation of the puncture needle 1. Compared to the existing hand-operated rotating handle 3, this method provides more precise control over the rotation angle of the puncture needle 1. This is particularly beneficial for minimally invasive arthroscopic surgery, where the operating space is limited. Precise control of the puncture needle 1's rotation angle prevents damage to the distal end of the needle. Furthermore, for curved or reverse-curved puncture needles, the component 4 allows the needle to rotate left or right by a preset angle, increasing the puncture range. Even if the needle cannot accurately reach the preset puncture position, rotating it using the rotating component 4 ensures it does. Therefore, this embodiment utilizes the rotating component 4 to rotate the puncture needle 1 relative to the handle 3, facilitating adjustments to minute angles and positions.

[0040] In a preferred embodiment, the rotating assembly 4 includes a first force-applying part 401 driven by finger pushing force and a first transmission unit connected to the first force-applying part 401. The first force-applying part 401 reciprocates on the handle 3 along the extending direction. The first transmission unit is located inside the handle 3 and is connected to the proximal end of the puncture needle 1. The first transmission unit is used to convert the linear reciprocating motion of the first force application part 401 into the rotational motion of the puncture needle 1.

[0041] Specifically, the first transmission unit is a screw adjustment mechanism, which includes a rotating wheel 403 and a lever 402. The rotating wheel 403 is rotatably disposed in the handle 3. The puncture needle 1 is fixedly connected to the rotating wheel 403 and is coaxially disposed with the rotating wheel 403. The rotating wheel 403 has a spiral groove 4031 on its circumferential side. One end of the lever 402 is connected to the first force-applying part 401, and the other end is embedded in the spiral groove 4031. The end of the lever 402 embedded in the spiral groove 4031 slides within the spiral groove 4031. To facilitate the sliding of the lever 402 within the spiral groove 4031, it is preferable to set the end of the lever 402 as spherical. The spherical end of the lever 402 is embedded in the spiral groove 4031. When the lever 402 moves against the first force-applying part 401 in the extending direction, the spherical end slides within the spiral groove 4031, thereby driving the rotating wheel 403 to rotate.

[0042] When the finger pushes the first force-applying part 401, the lever 402 drives the rotating wheel 403 to rotate, which in turn drives the puncture needle 1 to rotate. When the force-applying part 401 is stopped, the lever 402 stops moving, and the puncture needle 1 stops rotating.

[0043] To facilitate the assembly of the meniscus suture device, the handle 3 includes a first housing 301 and a second housing 302. The first housing 301 and the second housing 302 are detachably connected or fixedly connected by screws. In actual use, the first housing 301 is the upper housing, and the second housing 302 is the lower housing. After the first housing 301 and the second housing 302 are connected, they form the outer shell of the handle 3. To facilitate the operation of the first force-applying part 401 during surgery, in this embodiment, the first force-applying part 401 is disposed on the upper surface of the first housing 301. A first sliding surface 3011 is provided on the upper surface of the first housing 301 along the extending direction to facilitate the sliding of the first force-applying part 401 along the first sliding surface 3011. The rotating wheel 403 is rotatably disposed in the cavity inside the second housing 302. Of course, the first force-applying part 401 can also be disposed on the side of the first housing 301 or the second housing 302, or on the lower surface of the second housing 302; no limitation is made here.

[0044] To restrict the first force-applying part 401 to only perform linear reciprocating motion along the extension direction and to prevent the first force-applying part 401 from deviating on the sliding surface, a strip groove is provided on the handle 3 to restrict the movement of the first force-applying part 401. Specifically, the first housing 301 has a first strip groove 6 along the extension direction, and the first strip groove 6 extends towards the rotating wheel 403 and has a stepped groove 7 and a second strip groove 8. In this embodiment, the first strip groove 6, the stepped groove 7, and the second strip groove 8 are arranged sequentially from top to bottom. In sequence, the first force-applying part 401 includes a first push button 4011 and a first limiting plate 4012 embedded in the stepped groove 7. The first push button 4011 is connected to the first limiting plate 4012 through a connecting rod 4013. The first push button 4011 reciprocates along the extension direction on the first sliding surface 3011. The connecting rod 4013 is located in the first strip groove 6, and the lever 402 is located in the second strip groove 8. The end of the lever 402 away from the rotating wheel 403 passes through the first limiting plate 4012.

[0045] Since the first connecting rod 4013 is located in the first slot 6, the first push button 4011 can only drive the connecting rod 4013 to move axially between the proximal and distal ends along the first slot 6, preventing the first push button 4011 from deviating.

[0046] The rotating assembly 4 has a first push button 4011 on the outside of the handle 3. Internally, it uses a lever 402 and a rotating wheel 403 for transmission. Simply pushing the first push button 4011 towards the far or near end allows the hollow needle to rotate clockwise or counterclockwise, making it convenient and practical. To facilitate pushing the first push button 4011, it can be designed in an arc shape. To allow for better finger pressure when pushing the first push button 4011, a strip-shaped first anti-slip protrusion 40111 is provided on the outside of the first push button 4011, providing better force and an anti-slip function when pressing and pushing the first push button 4011.

[0047] In another preferred embodiment of this invention, to prevent accidental contact with the first push button 4011 and accidental rotation of the puncture needle 1, the rotating assembly 4 further includes a locking structure. The locking structure is used to lock the sliding of the first force application part 401. When the locking structure is locked, the first push button 4011 and the handle 3 are locked together and cannot move relative to each other. When the locking structure is unlocked, pushing the first push button 4011 will cause the first limiting plate 4012 to move the lever 402. The lever 402 slides in the spiral groove 4031, thereby driving the rotating wheel 403 to rotate, which in turn drives the puncture needle 1 to rotate about the extension direction as the axis.

[0048] A locking structure is further provided. When the locking structure is in the locked state, the first push button 4011 and the handle 3 cannot move relative to each other, and the puncture needle 1 is also locked. When an external force is applied to the first push button 4011, the locking structure can be unlocked, and the first push button 4011 can slide relative to the handle 3. At this time, the hollow needle can rotate left and right to realize the rotation control of the hollow needle.

[0049] Specifically, the locking structure includes a first elastic element 407 and a sawtooth engagement structure. The first elastic element 407 is sleeved on the lever 402. The upper end of the first elastic element 407 is fixed to the lower surface of the first limiting plate 4012, and the lower end of the first elastic element 407 is fixed to the side of the second strip groove 8. The sawtooth meshing structure includes a first sawtooth 408 and a second sawtooth 409 that meshes with the first sawtooth 408. Along the extension direction, the inner walls on both sides of the stepped groove 7 are provided with the first sawtooth 408, and the side of the first limiting plate 4012 that cooperates with the inner walls on both sides of the stepped groove 7 is provided with the second sawtooth 409. In the initial state, the locking structure is in the locked state, the first elastic element 407 is in the compressed state, and under the action of elastic force, the upper end of the first elastic element 407 abuts against the lower surface of the first limiting plate 4012, the bottom end abuts against the end face of the second strip groove 8, the first side 40121 of the first limiting plate 4012 (the upper surface of the first limiting plate 4012 in this embodiment) abuts against the first step surface 701 of the step groove 7, the first sawtooth 408 and the second sawtooth 409 mesh, and at this time the first push button 4011 does not contact the first sliding surface 3011; Press the first push button 4011, and the first push button 4011 contacts the first sliding surface 3011. The first saw tooth 408 disengages from the groove of the second saw tooth 409. The second side 40122 of the first limiting plate 4012 (the lower surface of the first limiting plate 4012 in this embodiment) contacts the second step surface 702 of the step groove 7, and the locking structure is unlocked. At this time, pushing the first push button 4011 can move it along the handle 3.

[0050] During the movement of the lever 402 driven by the first force-applying part 401, the moving lever 402 drives the rotating wheel 403 to rotate. Since the lever 402 is always suspended in the stepped groove 7 and the second strip groove 8, and one end is embedded in the spiral groove 4031, in order to prevent the lever 402 from bending during the movement, a guide part 406 is provided on the part of the lever 402 near the rotating wheel 403. That is, the rotating assembly 4 also includes a guide part 406, which includes a first guide plate. The I-shaped guide portion 406 is composed of the second guide plate 4061, the second guide plate 4063, and the guide post. The end of the lever 402 away from the first force application portion 401 passes through the first elastic member 407, the first guide plate 4061, the guide post, and the second guide plate 4063 in sequence. The end of the first elastic member 407 away from the first force application portion 401 can abut against the first guide plate 4061. When the first elastic member 407 is relatively thick, the first elastic member 407 can also abut against the side of the second strip groove 8. The second strip groove 8 extends in the direction of the rotating wheel 403 and has a third strip groove 9. The I-shaped limiting part is embedded in the third strip groove 9 to prevent the lever 402 from bending.

[0051] In this embodiment, a first push button 4011 is provided on the outside of the handle 3, and a lever 402 and a rotating wheel 403 are provided inside the handle 3. The first push button 4011, lever 402, and rotating wheel 403 work together to rotate the puncture needle 1. Pushing the first push button 4011 distally rotates the puncture needle 1 counterclockwise, while pushing it proximally rotates the hollow needle clockwise, thus achieving left and right rotation of the puncture needle 1. The structure is simple and the operation is convenient; simply pushing the first push button 4011 is enough to rotate the puncture needle 1.

[0052] Meanwhile, to prevent accidental contact with the first push button 4011 during surgery, a locking structure is provided. In the absence of external force, the first push button 4011 is subjected to the elastic force of the first elastic element 407, and the second serration 409 of the first limiting plate 4012 engages with the first rack, locking the first push button 4011 and the handle 3, preventing relative movement between them. At the same time, the position of the puncture needle 1 is also locked. However, when an external force is applied to the first push button 4011, the engagement between the first serration 408 and the second serration 409 is unlocked, and the first push button 4011 can slide relative to the handle 3. At this time, the puncture needle 1 can rotate, realizing the rotational control of the puncture needle 1.

[0053] In another preferred embodiment of this invention, the pushing component 5 includes a second force-applying part 501 driven by finger pushing force. The second force-applying part 501 is fixedly connected to the proximal end of the push needle 2. The second force-applying part 501 reciprocates along the axial direction of the suture to push the push needle 2 to move along the extension direction.

[0054] After the puncture needle 1 punctures the meniscus, the second force-applying part 501 is pushed, and the push needle 2 moves along the extension direction to push out the implant inside the puncture needle 1. For ease of operation during the operation, the second force-applying part 501 is also set on the upper surface of the first housing 301, and a second sliding surface 3012 is also provided on the upper surface of the first housing 301 along the extension direction. The second force-applying part 501 slides along the second sliding surface 3012.

[0055] To prevent the second force-applying part 501 from deviating during sliding and instead only performing linear reciprocating motion along the extension direction, the second force-applying part 501 includes a second push button 5011 and a push plate 5012. The second push button 5011 is connected to the push plate 5012, and the push plate 5012 is fixedly connected to the proximal end of the push needle 2. The second push button 5011 slides on the second sliding surface 3012 of the first housing 301. A slide rail 506 is provided on the inner surface of the second housing 302 along the extension direction, and the push plate 5012 is slidably connected to the slide rail 506, so that the push plate 5012 can only move along the slide rail 506, ensuring that the push plate 5012 performs linear reciprocating motion. To allow for better finger force application when pushing the second push button 5011, a strip-shaped second anti-slip protrusion 50111 is provided on the outside of the second push button 5011, which provides better force application and anti-slip function when the finger presses and pushes the second push button 5011.

[0056] When suturing a meniscus tear, the surgeon first punctures one side of the meniscus tear with the puncture needle 1 of the meniscus suture device, and then pushes out the first implant with the pusher needle 2 to attach it to the posterior wall of the meniscus. After the first implant is successfully attached, the puncture needle 1 is removed and punctures the other side of the meniscus tear again. The pusher needle 2 then pushes out the second implant, which is also attached to the posterior wall of the meniscus. Finally, the suture is tightened to secure both implants and complete the meniscus suture. Therefore, the pusher needle 2 needs to push the implant out of the puncture needle 1 in two stages. Since the meniscus suture device is operated under arthroscopy, the field of vision is limited. When pushing the pusher needle 2, it is possible that both implants will be pushed out at the same time. To avoid pushing both implants out at the same time, the movement of the pusher needle 2 needs to be restricted. Therefore, a second limiting plate 503 is set during the movement of the pusher plate 5012 from the distal end and the proximal end. The second limiting plate 503 is used to restrict the movement of the pusher plate 5012, and the second limiting plate 503 moves perpendicular to the extension direction. During the movement of the push plate 5012 along the extension direction, the second limiting plate 503 restricts the movement of the push plate 5012. At this time, the first implant is pushed out, and then the push plate 5012 returns to the preset position. Then, when the second implant needs to be pushed out, the second limiting plate 503 moves a preset distance in a direction perpendicular to the extension direction, and the push plate 5012 moves from the preset position to the distal end, pushing the second implant out from the puncture needle 1. The second limiting plate 503 realizes the two movements of the push plate 5012, and the two movements are separated to ensure the independence and accuracy of the two movements of the push plate 5012, ensuring that the two implants are accurately implanted into the preset position.

[0057] Assuming the extension direction of the meniscus suture device is the X-axis, in specific implementation, the movement direction of the second limiting plate 503 can be the Y-axis or the Z-axis. If it is the Z-axis, a vertical groove for the push needle 2 to pass through can be provided on the second limiting plate 503. During the upward or downward movement of the second limiting plate 503, the push needle 2 will not be affected. In this embodiment, the movement direction of the second limiting plate 503 is the Y-axis. A groove for the push needle 2 to pass through is provided on the second limiting plate 503. When the second limiting plate 503 moves along the Y-axis, it will not have any effect on the push needle 2. A slot 504 is provided on the inner surface of the second housing 302 along the Y-axis. The second limiting plate 503 is located in the slot 504 and moves along the slot 504 in the Y-axis direction.

[0058] During the surgical procedure, to facilitate the movement of the second limiting plate 503 along the slot 504, a button 505 for moving the second limiting plate 503 by finger is provided on the outer side of the handle 3. When the finger presses the button 505, the second limiting plate 503 moves in a direction perpendicular to the extension direction, so that the push plate 5012 continues to move to the distal end.

[0059] Since the implant needs to be reset after the pusher 2 pushes out the implant, a second elastic element 502 is also provided inside the second housing 302. One end of the second elastic element 502 is fixed to the inner wall of the second housing 302, and the other end is fixed to the push plate 5012. When a finger applies the second push button 5011, the second elastic element 502 extends. After the pusher 2 pushes out the implant, the finger releases the second push button 5011. At this time, due to the restoration of the second elastic element 502, the push plate 5012 will return to its initial position under the action of elastic force, thus resetting the pusher 2.

[0060] This invention utilizes the cooperation of the first push button 4011, the lever 402 and the rotating wheel 403 to realize the rotational movement of the puncture needle 1 relative to the handle 3, which facilitates the adjustment of the distal end of the puncture needle 1 for small angles and small positions; at the same time, it makes it easier for the distal end of the meniscus suturer to reach the posterior angle position, effectively reducing the risk of secondary damage to human tissue, reducing the probability of instrument failure, and facilitating the operation and use of doctors in clinical surgery.

[0061] The operator only needs to push the first push button 4011 on the outside of the handle 3 to rotate the puncture needle 1 counterclockwise or clockwise. The operation is very simple and the practical performance is better. In addition, there is no need to manually rotate the handle 3 to drive this component to rotate. Instead, the puncture needle 1 rotates relative to the push needle 2 and the handle 3, which allows for more precise control of the rotation angle of the puncture needle 1 and can also expand the puncture range of the puncture needle 1, making it easier for the operator to puncture the meniscus tissue.

[0062] The second push button 5011, push plate 5012 and second limiting plate 503 of the present invention cooperate to ensure that the push needle 2 can only push out one implant at a time. Due to the restriction of the second limiting plate 503, the push needle 2 only pushes out the first implant during the first axial movement. After the second limiting plate 503 moves, the second limiting plate 503 no longer restricts the push plate 5012. At this time, the axial movement of the push needle 2 can accurately push out the second implant.

[0063] This invention exposes only the first push button 4011, the second push button 5011, and the button 505 on the outside of the handle 3, enabling the accurate ejection of two implants by rotating the puncture needle 1 and pushing the needle 2 twice. The specific operation for suturing meniscus tissue gaps is as follows: a bone marrow tunnel is pre-drilled at the knee joint. The puncture needle 1 of the suture device is partially inserted into the bone marrow tunnel to the location of the meniscus gap. If it does not accurately reach the preset position, the first push button 4011 can be pushed to rotate the puncture needle 1 left and right to reach the preset position. Then, the puncture needle 1 first punctures one side of the meniscus tear, and then the second push button 5011 is pushed. Due to the restriction of the second limiting plate 503, the needle 2 accurately... The first implant is successfully inserted and placed against the posterior wall of the meniscus. Then, the second push button 5011 is released, and the second push button 5011 returns to its initial position, as does the push needle 2. After the first implant is successfully inserted, the puncture needle 1 is removed and punctured again on the other side of the meniscus tear. At this time, the button 505 is pressed, causing the second limiting plate 503 to move. The second push button 5011 is then pushed again, and the push needle 2 accurately inserts the second implant. The second implant is then placed against the posterior wall of the meniscus. The second push button 5011 is released, and it returns to its initial position. Finally, the suture is tightened to secure the two implants, completing the meniscus suture.

[0064] A meniscus suture device has an axis extending in a forward direction. The two ends of the suture device in the forward direction are defined as proximal and distal. The suture device includes a puncture needle 1, a pusher needle 2, and a handle 3. The puncture needle 1 is used to puncture meniscus tissue, and the pusher needle 2 is used to push out the implant. The proximal ends of the puncture needle 1 and the pusher needle 2 are located within the handle 3. The center lines of the puncture needle 1, the pusher needle 2, and the handle 3 coincide with the axis of the meniscus suture device. During use, the surgeon holds the handle 3 to operate the suture device. The handle 3 is designed to conform to the structure of human joints, making it more suitable for hand grip and more ergonomic, providing a comfortable feel for the surgeon.

[0065] The distal end of the puncture needle 1 is used to puncture the meniscus. The distal end of the puncture needle 1 can be straight or curved in the form of the present embodiment, i.e., a curved or reverse-curved puncture needle 1. The puncture needle 1 is a hollow needle with an axial cavity. The push needle 2 is movably inserted into the cavity inside the puncture needle 1. The implant for meniscus suture is also housed in the cavity of the puncture needle 1.

[0066] The handle 3 has a cavity, and a pushing component 5 and a rotating component 4 are provided in the cavity of the handle 3. The pushing component 5 is located on the side of the rotating component 4 near the proximal end. The pushing component 5 is connected to the push needle 2 to push the push needle 2 to move along the extension direction. The rotating component 4 is connected to the puncture needle 1 to realize the puncture needle 1 to rotate a preset angle around the extension direction as an axis.

[0067] The rotating component 4 enables the rotation of the puncture needle 1. Compared to the existing hand-operated rotating handle 3, this method provides more precise control over the rotation angle of the puncture needle 1. This is particularly beneficial for minimally invasive arthroscopic surgery, where the operating space is limited. Precise control of the puncture needle 1's rotation angle prevents damage to the distal end of the needle. Furthermore, for curved or reverse-curved puncture needles, the component 4 allows the needle to rotate left or right by a preset angle, increasing the puncture range. Even if the needle cannot accurately reach the preset puncture position, rotating it using the rotating component 4 ensures it does. Therefore, this embodiment utilizes the rotating component 4 to rotate the puncture needle 1 relative to the handle 3, facilitating adjustments to minute angles and positions.

[0068] In a preferred embodiment, the rotating assembly 4 includes a first force-applying part 401 driven by finger pushing force and a first transmission unit connected to the first force-applying part 401. The first force-applying part 401 reciprocates on the handle 3 along the extending direction. The first transmission unit is located inside the handle 3 and is connected to the proximal end of the puncture needle 1. The first transmission unit is used to convert the linear reciprocating motion of the first force application part 401 into the rotational motion of the puncture needle 1.

[0069] Specifically, the first transmission unit is a screw adjustment mechanism, which includes a rotating wheel 403 and a lever 402. The rotating wheel 403 is rotatably disposed in the handle 3. The puncture needle 1 is fixedly connected to the rotating wheel 403 and is coaxially disposed with the rotating wheel 403. The rotating wheel 403 has a spiral groove 4031 on its circumferential side. One end of the lever 402 is connected to the first force-applying part 401, and the other end is embedded in the spiral groove 4031. The end of the lever 402 embedded in the spiral groove 4031 slides within the spiral groove 4031. To facilitate the sliding of the lever 402 within the spiral groove 4031, it is preferable to set the end of the lever 402 as spherical. The spherical end of the lever 402 is embedded in the spiral groove 4031. When the lever 402 moves against the first force-applying part 401 in the extending direction, the spherical end slides within the spiral groove 4031, thereby driving the rotating wheel 403 to rotate.

[0070] When the finger pushes the first force-applying part 401, the lever 402 drives the rotating wheel 403 to rotate, which in turn drives the puncture needle 1 to rotate. When the force-applying part 401 is stopped, the lever 402 stops moving, and the puncture needle 1 stops rotating.

[0071] To facilitate the assembly of the meniscus suture device, the handle 3 includes a first housing 301 and a second housing 302. The first housing 301 and the second housing 302 are detachably connected or fixedly connected by screws. In actual use, the first housing 301 is the upper housing, and the second housing 302 is the lower housing. After the first housing 301 and the second housing 302 are connected, they form the outer shell of the handle 3. To facilitate the operation of the first force-applying part 401 during surgery, in this embodiment, the first force-applying part 401 is disposed on the upper surface of the first housing 301. A first sliding surface 3011 is provided on the upper surface of the first housing 301 along the extending direction to facilitate the sliding of the first force-applying part 401 along the first sliding surface 3011. The rotating wheel 403 is rotatably disposed in the cavity inside the second housing 302. Of course, the first force-applying part 401 can also be disposed on the side of the first housing 301 or the second housing 302, or on the lower surface of the second housing 302; no limitation is made here.

[0072] To restrict the first force-applying part 401 to only perform linear reciprocating motion along the extension direction and to prevent the first force-applying part 401 from deviating on the sliding surface, a strip groove is provided on the handle 3 to restrict the movement of the first force-applying part 401. Specifically, the first housing 301 has a first strip groove 6 along the extension direction, and the first strip groove 6 extends towards the rotating wheel 403 and has a stepped groove 7 and a second strip groove 8. In this embodiment, the first strip groove 6, the stepped groove 7, and the second strip groove 8 are arranged sequentially from top to bottom. In sequence, the first force-applying part 401 includes a first push button 4011 and a first limiting plate 4012 embedded in the stepped groove 7. The first push button 4011 is connected to the first limiting plate 4012 through a connecting rod 4013. The first push button 4011 reciprocates along the extension direction on the first sliding surface 3011. The connecting rod 4013 is located in the first strip groove 6, and the lever 402 is located in the second strip groove 8. The end of the lever 402 away from the rotating wheel 403 passes through the first limiting plate 4012.

[0073] Since the first connecting rod 4013 is located in the first slot 6, the first push button 4011 can only drive the connecting rod 4013 to move axially between the proximal and distal ends along the first slot 6, preventing the first push button 4011 from deviating.

[0074] The rotating assembly 4 has a first push button 4011 on the outside of the handle 3. Internally, it uses a lever 402 and a rotating wheel 403 for transmission. Simply pushing the first push button 4011 towards the far or near end allows the hollow needle to rotate clockwise or counterclockwise, making it convenient and practical. To facilitate pushing the first push button 4011, it can be designed in an arc shape. To allow for better finger pressure when pushing the first push button 4011, a strip-shaped first anti-slip protrusion 40111 is provided on the outside of the first push button 4011, providing better force and an anti-slip function when pressing and pushing the first push button 4011.

[0075] In another preferred embodiment of this invention, to prevent accidental contact with the first push button 4011 and accidental rotation of the puncture needle 1, the rotating assembly 4 further includes a locking structure. The locking structure is used to lock the sliding of the first force application part 401. When the locking structure is locked, the first push button 4011 and the handle 3 are locked together and cannot move relative to each other. When the locking structure is unlocked, pushing the first push button 4011 will cause the first limiting plate 4012 to move the lever 402. The lever 402 slides in the spiral groove 4031, thereby driving the rotating wheel 403 to rotate, which in turn drives the puncture needle 1 to rotate about the extension direction as the axis.

[0076] A locking structure is further provided. When the locking structure is in the locked state, the first push button 4011 and the handle 3 cannot move relative to each other, and the puncture needle 1 is also locked. When an external force is applied to the first push button 4011, the locking structure can be unlocked, and the first push button 4011 can slide relative to the handle 3. At this time, the hollow needle can rotate left and right to realize the rotation control of the hollow needle.

[0077] Specifically, the locking structure includes a first elastic element 407 and a sawtooth engagement structure. The first elastic element 407 is sleeved on the lever 402. The upper end of the first elastic element 407 is fixed to the lower surface of the first limiting plate 4012, and the lower end of the first elastic element 407 is fixed to the side of the second strip groove 8. The sawtooth meshing structure includes a first sawtooth 408 and a second sawtooth 409 that meshes with the first sawtooth 408. Along the extension direction, the inner walls on both sides of the stepped groove 7 are provided with the first sawtooth 408, and the side of the first limiting plate 4012 that cooperates with the inner walls on both sides of the stepped groove 7 is provided with the second sawtooth 409. In the initial state, the locking structure is in the locked state, the first elastic element 407 is in the compressed state, and under the action of elastic force, the upper end of the first elastic element 407 abuts against the lower surface of the first limiting plate 4012, and the bottom end abuts against the side surface 801 of the second strip groove. The first side surface 40121 of the first limiting plate 4012 (the upper surface of the first limiting plate 4012 in this embodiment) abuts against the first step surface 701 of the step groove 7. The first saw tooth 408 and the second saw tooth 409 are engaged. At this time, the first push button 4011 is not in contact with the first sliding surface 3011. Press the first push button 4011, and the first push button 4011 contacts the first sliding surface 3011. The first saw tooth 408 disengages from the groove of the second saw tooth 409. The second side 40122 of the first limiting plate 4012 (the lower surface of the first limiting plate 4012 in this embodiment) contacts the second step surface 702 of the step groove 7, and the locking structure is unlocked. At this time, pushing the first push button 4011 can move it along the handle 3.

[0078] During the movement of the lever 402 driven by the first force-applying part 401, the moving lever 402 drives the rotating wheel 403 to rotate. Since the lever 402 is always suspended in the stepped groove 7 and the second strip groove 8, and one end is embedded in the spiral groove 4031, in order to prevent the lever 402 from bending during the movement, a guide part 406 is provided on the part of the lever 402 near the rotating wheel 403. That is, the rotating assembly 4 also includes a guide part 406, which includes a first guide plate. The I-shaped guide portion 406 is composed of the second guide plate 4061, the second guide plate 4063, and the guide post. The end of the lever 402 away from the first force application portion 401 passes through the first elastic member 407, the first guide plate 4061, the guide post, and the second guide plate 4063 in sequence. The end of the first elastic member 407 away from the first force application portion 401 can abut against the first guide plate 4061. When the first elastic member 407 is relatively thick, the first elastic member 407 can also abut against the side of the second strip groove 8. The second strip groove 8 extends in the direction of the rotating wheel 403 and has a third strip groove 9. The I-shaped limiting part is embedded in the third strip groove 9 to prevent the lever 402 from bending.

[0079] In this embodiment, a first push button 4011 is provided on the outside of the handle 3, and a lever 402 and a rotating wheel 403 are provided inside the handle 3. The first push button 4011, lever 402, and rotating wheel 403 work together to rotate the puncture needle 1. Pushing the first push button 4011 distally rotates the puncture needle 1 counterclockwise, while pushing it proximally rotates the hollow needle clockwise, thus achieving left and right rotation of the puncture needle 1. The structure is simple and the operation is convenient; simply pushing the first push button 4011 is enough to rotate the puncture needle 1.

[0080] Meanwhile, to prevent accidental contact with the first push button 4011 during surgery, a locking structure is provided. In the absence of external force, the first push button 4011 is subjected to the elastic force of the first elastic element 407, and the second serration 409 of the first limiting plate 4012 engages with the first rack, locking the first push button 4011 and the handle 3, preventing relative movement between them. At the same time, the position of the puncture needle 1 is also locked. However, when an external force is applied to the first push button 4011, the engagement between the first serration 408 and the second serration 409 is unlocked, and the first push button 4011 can slide relative to the handle 3. At this time, the puncture needle 1 can rotate, realizing the rotational control of the puncture needle 1.

[0081] In another preferred embodiment of this invention, the pushing component 5 includes a second force-applying part 501 driven by finger pushing force. The second force-applying part 501 is fixedly connected to the proximal end of the push needle 2. The second force-applying part 501 reciprocates along the axial direction of the suture to push the push needle 2 to move along the extension direction.

[0082] After the puncture needle 1 punctures the meniscus, the second force-applying part 501 is pushed, and the push needle 2 moves along the extension direction to push out the implant inside the puncture needle 1. For ease of operation during the operation, the second force-applying part 501 is also set on the upper surface of the first housing 301, and a second sliding surface 3012 is also provided on the upper surface of the first housing 301 along the extension direction. The second force-applying part 501 slides along the second sliding surface 3012.

[0083] To prevent the second force-applying part 501 from deviating during sliding and instead only performing linear reciprocating motion along the extension direction, the second force-applying part 501 includes a second push button 5011 and a push plate 5012. The second push button 5011 is connected to the push plate 5012, and the push plate 5012 is fixedly connected to the proximal end of the push needle 2. The second push button 5011 slides on the second sliding surface 3012 of the first housing 301. A slide rail 506 is provided on the inner surface of the second housing 302 along the extension direction, and the push plate 5012 is slidably connected to the slide rail 506, so that the push plate 5012 can only move along the slide rail 506, ensuring that the push plate 5012 performs linear reciprocating motion. To allow for better finger force application when pushing the second push button 5011, a strip-shaped second anti-slip protrusion 50111 is provided on the outside of the second push button 5011, which provides better force application and anti-slip function when the finger presses and pushes the second push button 5011.

[0084] When suturing a meniscus tear, the surgeon first punctures one side of the meniscus tear with the puncture needle 1 of the meniscus suture device, and then pushes out the first implant with the pusher needle 2 to attach it to the posterior wall of the meniscus. After the first implant is successfully attached, the puncture needle 1 is removed and punctures the other side of the meniscus tear again. The pusher needle 2 then pushes out the second implant, which is also attached to the posterior wall of the meniscus. Finally, the suture is tightened to secure both implants and complete the meniscus suture. Therefore, the pusher needle 2 needs to push the implant out of the puncture needle 1 in two stages. Since the meniscus suture device is operated under arthroscopy, the field of vision is limited. When pushing the pusher needle 2, it is possible that both implants will be pushed out at the same time. To avoid pushing both implants out at the same time, the movement of the pusher needle 2 needs to be restricted. Therefore, a second limiting plate 503 is set during the movement of the pusher plate 5012 from the distal end and the proximal end. The second limiting plate 503 is used to restrict the movement of the pusher plate 5012, and the second limiting plate 503 moves perpendicular to the extension direction. During the movement of the push plate 5012 along the extension direction, the second limiting plate 503 restricts the movement of the push plate 5012. At this time, the first implant is pushed out, and then the push plate 5012 returns to the preset position. Then, when the second implant needs to be pushed out, the second limiting plate 503 moves a preset distance in a direction perpendicular to the extension direction, and the push plate 5012 moves from the preset position to the distal end, pushing the second implant out from the puncture needle 1. The second limiting plate 503 realizes the two movements of the push plate 5012, and the two movements are separated to ensure the independence and accuracy of the two movements of the push plate 5012, ensuring that the two implants are accurately implanted into the preset position.

[0085] Assuming the extension direction of the meniscus suture device is the X-axis, in specific implementation, the movement direction of the second limiting plate 503 can be the Y-axis or the Z-axis. If it is the Z-axis, a vertical groove for the push needle 2 to pass through can be provided on the second limiting plate 503. During the upward or downward movement of the second limiting plate 503, the push needle 2 will not be affected. In this embodiment, the movement direction of the second limiting plate 503 is the Y-axis. A groove for the push needle 2 to pass through is provided on the second limiting plate 503. When the second limiting plate 503 moves along the Y-axis, it will not have any effect on the push needle 2. A slot 504 is provided on the inner surface of the second housing 302 along the Y-axis. The second limiting plate 503 is located in the slot 504 and moves along the slot 504 in the Y-axis direction.

[0086] During the surgical procedure, to facilitate the movement of the second limiting plate 503 along the slot 504, a button 505 for moving the second limiting plate 503 by finger is provided on the outer side of the handle 3. When the finger presses the button 505, the second limiting plate 503 moves in a direction perpendicular to the extension direction, so that the push plate 5012 continues to move to the distal end.

[0087] Since the implant needs to be reset after the pusher 2 pushes out the implant, a second elastic element 502 is also provided inside the second housing 302. One end of the second elastic element 502 is fixed to the inner wall of the second housing 302, and the other end is fixed to the push plate 5012. When a finger applies the second push button 5011, the second elastic element 502 extends. After the pusher 2 pushes out the implant, the finger releases the second push button 5011. At this time, due to the restoration of the second elastic element 502, the push plate 5012 will return to its initial position under the action of elastic force, thus resetting the pusher 2.

[0088] This embodiment utilizes the cooperation of the first push button 4011, the lever 402, and the rotating wheel 403 to achieve the rotational movement of the puncture needle 1 relative to the handle 3, which facilitates the adjustment of the distal end of the puncture needle 1 for minute angles and positions; at the same time, it makes it easier for the distal end of the meniscus suturer to reach the posterior angle position, effectively reducing the risk of secondary damage to human tissue, reducing the probability of instrument failure, and facilitating the doctor's clinical surgical operation and use.

[0089] The operator only needs to push the first push button 4011 on the outside of the handle 3 to rotate the puncture needle 1 counterclockwise or clockwise. The operation is very simple and the practical performance is better. In addition, there is no need to manually rotate the handle 3 to drive this component to rotate. Instead, the puncture needle 1 rotates relative to the push needle 2 and the handle 3, which allows for more precise control of the rotation angle of the puncture needle 1 and can also expand the puncture range of the puncture needle 1, making it easier for the operator to puncture the meniscus tissue.

[0090] In this embodiment, the second push button 5011, the push plate 5012, and the second limiting plate 503 work together to ensure that the push needle 2 can only push out one implant at a time. Due to the restriction of the second limiting plate 503, the push needle 2 only pushes out the first implant during the first axial movement. After the second limiting plate 503 moves, the second limiting plate 503 no longer restricts the push plate 5012. At this time, the axial movement of the push needle 2 can accurately push out the second implant.

[0091] In this embodiment, only the first push button 4011, the second push button 5011, and the button 505 are exposed on the outside of the handle 3, which allows for the accurate ejection of two implants by rotating the puncture needle 1 and pushing the push needle 2 twice. The specific operation when suturing the meniscus tissue gap is as follows: a bone marrow tunnel is pre-drilled at the knee joint. The puncture needle 1 of the suture device is partially inserted into the bone marrow tunnel to the position where the meniscus gap exists. If it does not accurately reach the preset position, the first push button 4011 can be pushed to rotate the puncture needle 1 left and right to reach the preset position. Then, after the puncture needle 1 punctures one side of the meniscus tear, the second push button 5011 is pushed. Due to the restriction of the second limiting plate 503, the push needle 2... Accurately insert the first implant to attach it to the posterior wall of the meniscus. Then release the second push button 5011, which returns to its initial position, and the push needle 2 also returns to its initial position. After the first implant is successfully attached, remove the puncture needle 1 and puncture the other side of the meniscus tear again. At this time, press the button 505 to move the second limiting plate 503, and then push the second push button 5011 again. The push needle 2 accurately inserts the second implant, which is then attached to the posterior wall of the meniscus. Release the second push button 5011, which returns to its initial position. Finally, tighten the suture to secure the two implants and complete the meniscus suture.

[0092] Therefore, the meniscus suture device in this embodiment is very easy to operate and very easy for doctors to learn.

[0093] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A meniscus suture device, characterized in that, The meniscus suture device includes an axis extending in a extending direction, defining the two opposite ends of the meniscus suture device in the extending direction as a proximal end and a distal end, the meniscus suture device comprising: Puncture needle; A push needle, which is coaxially arranged with the puncture needle and is movably inserted inside the puncture needle; The handle includes a pushing component and a rotating component. The pushing component is connected to the push needle to push the push needle to move along the extension direction. The rotating component is connected to the puncture needle to enable the puncture needle to rotate around the extension direction as an axis by a preset angle. The rotating assembly includes a first force-applying part driven by finger thrust and a first transmission unit connected to the first force-applying part, the first force-applying part reciprocating along the extending direction. The first transmission unit is located inside the handle and connected to the proximal end of the puncture needle. The first transmission unit is used to convert the linear reciprocating motion of the first force application part into the rotational motion of the puncture needle. The first transmission unit is a screw adjustment mechanism, which includes a rotating wheel and a lever. The rotating wheel is rotatably disposed inside the handle. The puncture needle is fixedly connected to the rotating wheel and is coaxially disposed with the rotating wheel. The handle has a first strip groove along the extending direction, the first strip groove extending towards the rotating wheel has a stepped groove and a second strip groove, the first force application part includes a first push button and a first limiting plate embedded in the stepped groove, the first push button is connected to the first limiting plate through a connecting rod, and the connecting rod is located in the first strip groove; The rotating assembly further includes a locking structure for locking the sliding of the first force-applying part; The locking structure includes a first elastic element and a serrated engagement structure, wherein the first elastic element is sleeved on the lever. The sawtooth meshing structure includes a first sawtooth and a second sawtooth that meshes with the first sawtooth. Along the extending direction, the first sawtooth is provided on the inner walls of both sides of the stepped groove, and the side of the first limiting plate that cooperates with the inner walls of both sides of the stepped groove is provided as the second sawtooth. In the initial state, the first elastic element is in a compressed state. Under the action of elastic force, one end of the first elastic element abuts against the first limiting plate, and the other end abuts against the side of the second strip groove. The first side of the first limiting plate abuts against the first step surface of the stepped groove, and the first saw tooth and the second saw tooth mesh. Pressing the first push button causes the second side of the first limiting plate to contact the second step surface of the stepped groove, disengaging the second saw tooth from the groove of the first saw tooth, thus unlocking the locking structure.

2. The meniscus suture device according to claim 1, characterized in that, The rotating wheel has a spiral groove on its circumferential side. One end of the lever is connected to the first force-applying part, and the other end is embedded in the spiral groove. The end of the lever embedded in the spiral groove slides within the spiral groove. Pushing the first force-applying part causes the lever to drive the rotating wheel to rotate by a preset angle, which in turn drives the puncture needle to rotate by a preset angle.

3. The meniscus suture device according to claim 1, characterized in that, The rotating assembly further includes a guide portion, which comprises an I-shaped guide portion consisting of a first guide plate, a second guide plate, and a guide post. The end of the lever away from the first force-applying portion passes sequentially through the first elastic element, the first guide plate, the guide post, and the second guide plate. The second groove extends toward the rotating wheel and has a third groove. The I-shaped guide is embedded in the third groove to prevent the lever from bending.

4. The meniscus suture device according to any one of claims 1-3, characterized in that, The first push button has a first anti-slip protrusion on its exterior.

5. The meniscus suture device according to claim 1, characterized in that, The pushing component includes a second force-applying part driven by finger pushing force. The second force-applying part is fixedly connected to the proximal end of the push needle. The second force-applying part reciprocates along the extension direction to push the push needle to move along the extension direction.

6. The meniscus suture device according to claim 5, characterized in that, The second force-applying part includes a second push button and a push plate, the second push button being connected to the push plate, and the push plate being fixedly connected to the proximal end of the push needle; The handle has a slide rail inside along the extending direction, and the push plate is slidably connected to the slide rail.

7. The meniscus suture device according to claim 5, characterized in that, The pushing component further includes a second limiting plate, which restricts the movement of the second force-applying part, and the second limiting plate moves in a direction perpendicular to the extension direction.

8. The meniscus suture device according to claim 7, characterized in that, The handle has a slot inside that is perpendicular to the extension direction, the second limiting plate is engaged in the slot, and the handle has a button on the outside that drives the second limiting plate to move.

9. The meniscus suture device according to claim 5, characterized in that, The handle is also provided with a second elastic element, one end of which is fixed to the inner wall of the handle and the other end is fixed to the second force-applying part.

10. The meniscus suture device according to any one of claims 6-9, characterized in that, The second push button has a second anti-slip protrusion on its exterior.

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