A modular, detachable, disposable endoscopic suture anastomosis device assembly

Abstract

The present application relates to the technical field of minimally invasive surgical instruments, and discloses a modular detachable disposable endoscope suture anastomat assembly, which comprises a handle assembly, a sheath tube assembly, a clamp head assembly and a suture needle, the handle assembly is hingedly assembled with a movable handle, the sheath tube assembly is provided with an outer sheath tube and a built-in transmission assembly, the clamp head assembly is provided with upper and lower clamp jaws which can be relatively slidably opened and closed, and a self-locking driving member is integrated in the clamp head, the present application can solve the defects of traditional endoscope suture anastomosers, such as dependence on friction clamping, poor stability, low transmission precision, weak operation field adaptation ability, complicated operation and insufficient surgical safety, and effectively improve the suture stability and instrument versatility.

Description

Technical Field

[0001] This invention relates to the field of minimally invasive surgical instruments, specifically to a modular, detachable, disposable laparoscopic suture stapler assembly. Background Technology

[0002] Existing conventional disposable laparoscopic suture devices mainly consist of a handle assembly, a sheath, an internal transmission rod, a front hinged clamp head, and a matching needle and suture assembly. They rely on the friction between the anti-slip toothed surface on the inside of the clamp jaws and the outer wall of the suture needle to achieve clamping and fixation. The surgeon needs to continuously grip the movable handle to maintain the clamping state of the jaws. The push-pull transmission of the handle controls the opening and closing of the front clamp jaws to clamp the suture needle. With the help of the needle and suture assembly, they can achieve interrupted and continuous suturing inside the body. They are an indispensable basic instrument for laparoscopic surgery.

[0003] However, with existing laparoscopic suture devices, when performing deep and narrow surgical field suturing, tightening and knotting sutures, and puncturing thick and tough tissues, the tension of the sutures and the reaction force of the tissue can easily cause the suture needle to slip or deflect within the jaws, and in severe cases, the suture needle may fall out of the body. At the same time, the fallen suture needle needs to be repeatedly searched and removed with grasping forceps, which greatly prolongs the operation time. If it is left inside the body, it will cause medical risks such as foreign body interference and organ scratches. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a modular, detachable, disposable laparoscopic suture anastomosis device assembly. Through the cooperation of a suture drive component, a suture transmission component, and a suture locking component, it solves the technical problems of existing technologies, such as easy slippage and dislodgement of suture needles, large transmission backlash, cumbersome operation, lack of self-adaptive reset, lack of one-way anti-retraction function, limited angle adjustment, and poor clinical versatility. Through a brand-new mechanical linkage self-locking principle and rigid transmission structure design, it significantly improves suture accuracy, operational safety, and ease of operation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This invention provides a modular, detachable, disposable laparoscopic suture anastomosis device assembly, including a handle assembly, a sheath assembly, a clamp head assembly, and a suture needle. The handle assembly includes a fixed handle and a movable handle hinged to the fixed handle. The sheath assembly includes an outer sheath and a transmission assembly passing through the outer sheath, one end of which is connected to the movable handle. The clamp head assembly includes an upper clamp jaw and a lower clamp jaw. The lower clamp jaw is mounted on the outer sheath, and the upper clamp jaw is movably mounted on the lower clamp jaw and can slide relative to the lower clamp jaw. A self-locking drive is provided within the clamp head assembly. The self-locking drive includes a suture drive, a suture transmission, and a suture locking member. The suture drive is connected to the other end of the transmission assembly. The suture transmission is mounted on the suture drive and can drive the suture needle to perform suture operations under the drive of the suture drive. The suture locking member is mounted on the suture transmission and locks the suture needle to prevent it from falling out or slipping.

[0007] By dividing the self-locking drive unit into three main execution units—a suture drive unit, a suture transmission unit, and a suture locking unit—the suture drive unit directly connects to the output end of the transmission component to receive power, and then synchronously distributes the power to the suture transmission unit. This achieves integrated power transmission, resulting in a simple, compact, and highly integrated overall structure. In addition to performing conventional needle clamping operations, it can simultaneously complete the entire process of needle locking, puncture, and repositioning by relying on the built-in self-locking drive structure. This completely eliminates the traditional laparoscopic suture device's operation mode of relying solely on the friction of the clamping jaws to hold the needle. It fundamentally solves the problems of needle slippage, easy dislodgement, and the need for frequent re-clamping and repositioning during surgery, significantly reducing the difficulty of minimally invasive surgery and the number of times instruments frequently enter and exit the trocar during surgery.

[0008] Preferably, the sewing transmission component includes a locking needle cam and a linkage swing arm. The locking needle cam is rotatably mounted inside the jaw clamping groove of the lower jaw. The locking needle cam is connected to one end of the transmission component away from the handle assembly. One end of the linkage swing arm is hinged to the locking needle cam.

[0009] During the power delivery process of the transmission component, the locking needle cam is driven to rotate synchronously by the swing trajectory of the linkage arm. The cam's eccentric rotation principle is used to squeeze and press the tail of the suture needle placed inside the clamping groove of the jaws. Together with the clamping groove of the jaws, a closed double clamping area is formed, which greatly improves clamping stability compared to ordinary planar clamping structures. At the same time, the lever-type transmission structure has low transmission resistance and fewer parts, which is suitable for the design requirements of miniaturization and low-cost mass production of disposable medical devices. It can realize real-time linkage between handle operation and locking needle action, and can complete automatic locking needle without the surgeon having to add any additional independent operation steps.

[0010] Preferably, the suture locking component includes a limiting slider and a limiting spring. A limiting groove is provided on the linkage swing arm corresponding to the limiting slider. The limiting slider is slidably disposed in the limiting groove and can slide up and down within the limiting groove. An installation groove is provided at the lower end of the limiting slider. The limiting spring is installed in the installation groove and can apply a vertical force to the limiting slider. A limiting rod is installed at the upper end of the limiting slider. A guide groove is provided on the lower jaw corresponding to the arc of the suture needle. The limiting rod is disposed through the guide groove and can move within the guide groove. A reset groove is provided on the suture needle. One end of the limiting rod that extends through the guide groove can be engaged in the reset groove. The reset groove is inclined on the side wall opposite to the needle exit direction. The depth of the reset groove gradually increases along the needle exit direction, thereby ensuring that after the suture needle completes a single suture operation, the limiting rod can slide out along the inclined side wall of the reset groove.

[0011] A limiting groove is made on the surface of the linkage arm to accommodate the installation of the limiting slider, allowing the limiting slider to slide freely vertically along the limiting groove. An installation groove is made at the lower end of the limiting slider to house a limiting spring. The limiting spring continuously applies a vertical pre-tightening force to the limiting slider. A limiting rod is integrally mounted on the upper end of the limiting slider. An arc-shaped guide groove adapted to the movement trajectory of the suture needle is made inside the lower jaw to allow the limiting rod to slide through. At the same time, a reset groove is made on the surface of the suture needle to cooperate with the limiting rod. The side wall of the reset groove away from the needle exit direction is set as an inclined structure, and the depth of the reset groove gradually increases along the needle exit direction. The overall structure works together to achieve multi-directional limiting of the suture needle by engaging the reset groove with the limiting rod when the needle is clamped, avoiding the problem of needle deviation and rotation. Furthermore, the inclined groove structure allows the limiting rod to automatically slide and reset after the suture needle punctures the tissue and completes a single suture withdrawal operation, without requiring the surgeon to unlock the reset mechanism separately. This achieves an adaptive release and reset function, simplifying the overall surgical procedure and reducing the surgeon's operational fatigue caused by prolonged suturing.

[0012] Preferably, it also includes a stop pin, which is U-shaped. The lower jaw has an embedded groove corresponding to the stop pin, and the stop pin is installed in the embedded groove. The sewing needle has a stop groove corresponding to the stop pin, and the stop groove is V-shaped. One end of the stop pin can abut in the stop groove. The stop pin is made of elastic material, so as to ensure that the stop pin can slide out of the stop groove when the sewing needle comes out, while avoiding the reverse movement of the sewing needle.

[0013] Relying on the elastic deformation characteristics of the elastic stop needle itself, when the needle is inserted in the forward direction, the puncture force can directly squeeze the stop needle to make it disengage from the stop groove without interfering with normal suturing operations. When the needle is subjected to the tension of the suture and tends to retreat in the reverse direction, the U-shaped stop needle and the V-shaped stop groove interlock to form a one-way limiting structure. Together with the aforementioned limiting rod and reset groove, they form a two-way limiting protection system, which respectively limits the vertical deviation and reverse slippage of the needle. The double protection eliminates the medical risk of the needle falling out into the patient's body during knotting, suture pulling, and continuous suturing, further improving the operational safety of minimally invasive surgery.

[0014] Preferably, the transmission assembly is configured as a rigid transmission push rod, which is installed along the axial direction of the outer sheath and is capable of linear reciprocating motion along the axial direction of the outer sheath. The two ends of the rigid transmission push rod are respectively connected to the movable handle and the linkage swing arm.

[0015] Preferably, the sewing drive includes a transmission plate and a transmission rod. A transmission groove is formed in the lower jaw, the transmission plate is slidably disposed on the transmission groove, the transmission rod is rotatably disposed on the outer jaw, and the lower end of the transmission rod passes through the transmission groove. A transmission gear is installed at the lower end of the transmission rod. A toothed groove is formed on the transmission plate, and the transmission gear meshes in the toothed groove. As the transmission plate slides in the transmission groove, it drives the transmission rod to rotate. The upper end of the transmission rod is connected to the sewing drive.

[0016] Preferably, it further includes a rotating base, which is rotatably connected to the fixed handle. The outer sheath is mounted on the rotating base, and the transmission component passes through the rotating base and is connected to the movable handle. The transmission component can rotate relative to the movable handle by means of universal adjustment. A locking element for locking the rotation action is installed on the rotating base.

[0017] Preferably, the inner sidewalls of the upper and lower jaws are arranged in an array with multiple sets of inclined anti-slip ridges, and the surface of the anti-slip ridges is frosted to increase the clamping friction of the jaws.

[0018] Preferably, the outer diameter of the outer sheath is set to 5mm or 6mm to fit the standard clinical laparoscopic trocar, and the outer sheath is available in two lengths of 330mm and 450mm to fit the superficial minimally invasive surgery and the deep abdominal and pelvic surgery, respectively.

[0019] Preferably, the suture needle is a 1 / 2 arc or 3 / 8 arc medical stainless steel curved needle, which is compatible with various specifications of medical sutures from 2-0 to 5-0, and the tail size of the suture needle matches the clamping gap of the clamping groove and the locking cam.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0021] It adopts a sliding and opening upper and lower clamping jaw and integrates an integrated suture needle self-locking drive structure. Relying on the locking needle cam, linkage swing arm, suture locking component and U-shaped needle stop, it forms a mechanical synchronous locking, automatic reset and one-way anti-retraction limit system. It abandons the traditional single friction clamping method, effectively prevents suture needle slippage and reverse fall, reduces the risk of needle falling during operation and reduces operator fatigue. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a modular, detachable, disposable laparoscopic suture stapler assembly according to this application;

[0023] Figure 2 This is a front view of a modular, detachable, disposable laparoscopic suture stapler assembly according to this application;

[0024] Figure 3 for Figure 2 Cross-sectional view of the fracture along the AA direction;

[0025] Figure 4 for Figure 1 Enlarged view of section B;

[0026] Figure 5 This is a schematic diagram of a fractured structure illustrating the connection relationship between the sewing drive component and the sewing transmission component in an embodiment of this application.

[0027] Figure 6 This is a schematic diagram of the fracture structure from another perspective, illustrating the connection relationship between the sewing drive component and the sewing transmission component in an embodiment of this application.

[0028] Figure 7 This is a schematic diagram of the stitching locking component in an embodiment of this application;

[0029] Figure 8 This is a schematic diagram illustrating the installation relationship between the stop pin and the lower jaw in an embodiment of this application;

[0030] Figure 9 This is a schematic diagram of the suture needle in an embodiment of this application.

[0031] Reference numerals: 1. Handle assembly; 11. Fixed handle; 12. Movable handle; 2. Sheath assembly; 21. Outer sheath; 22. Transmission assembly; 3. Pliers head assembly; 31. Upper jaw; 32. Lower jaw; 321. Embedding groove; 322. Guide groove; 4. Needle; 41. Reset groove; 42. Stop groove; 511. Transmission plate; 512. Transmission rod; 521. Locking needle cam; 522. Linkage swing arm; 5221. Limiting slide groove; 53. Sewing locking element; 531. Limiting slider; 5311. Mounting groove; 532. Limiting spring; 533. Limiting rod; 6. Needle stop; 7. Rotating seat; 8. Locking element. Detailed Implementation

[0032] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations thereof.

[0033] like Figure 1 As shown, this embodiment provides a modular, detachable, disposable laparoscopic suture stapler assembly, including a handle assembly 1, a sheath assembly 2, a clamp head assembly 3, and a suture needle 4. The whole assembly adopts an integrated mechanical linkage structure, without electrical control or complex sensor structure. The purely mechanical structure realizes fully automatic self-locking and reset functions, with strong stability, low cost, and compatibility with disposable aseptic use specifications, fully meeting the clinical use standards of minimally invasive laparoscopic surgery.

[0034] The handle assembly 1, serving as an integrated unit for instrument power input and angle adjustment, includes a fixed handle 11 and a movable handle 12. The movable handle 12 is hinged to the inner end of the fixed handle 11 via a pin, allowing it to perform a stable fixed-axis pinching and swinging motion around the pin, providing the initial power input for the opening and closing of the front clamp head and the operation of the self-locking mechanism. A dedicated power transfer connection structure is provided between the movable handle 12 and the transmission assembly 22, specifically including a hinged push block, a limiting guide groove 322, and an anti-disengagement sleeve. A linear guide groove 322 is formed axially inside the fixed handle 11, and the hinged push block is slidably embedded inside the guide groove 322, allowing it to slide linearly back and forth along the sheath axis, effectively preventing radial swaying and wobbling. At the same time, a return spring is provided in the limiting guide groove 322 to assist the movable handle 12 in resetting. The upper inner side of the movable handle 12 is integrally formed with a drive lug. The drive lug is hinged to the tail of the hinged push block via a short pin, forming a crank-slider power conversion structure of "handle swing - push block linear push". This precisely converts the arc swing motion of the movable handle 12 into the axial linear motion of the transmission component 22, resulting in smooth power conversion without jamming or idle stroke. The tail end of the transmission component 22 is detachably locked to the hinged push block via an anti-disengagement sleeve, ensuring synchronized power linkage and avoiding loosening or dislocation problems that may occur with long-term reciprocating motion. The overall connection structure has extremely small transmission gaps and high response synchronization, enabling real-time linkage between handle operation and front-end locking needle action. The front end of the fixed handle 11 is equipped with a rotating seat 7, which can rotate freely 360° relative to the handle body. The rotating seat 7 is equipped with an independent locking element 8, which can mechanically lock at any rotation angle, preventing the instrument from deflecting or shifting during suturing operations and ensuring stable and controllable suturing posture.

[0035] The sheath assembly 2, serving as the main body for power transmission, angle adjustment, and instrument support, includes an outer sheath 21 and a transmission component 22 penetrating within it. This invention provides two replaceable transmission implementation structures to adapt to both straight-head rigid operation scenarios and curved-head multi-angle bending operation scenarios, significantly broadening the instrument's adaptability to various working conditions. The preferred main embodiment employs a rigid transmission push rod structure. The outer sheath 21 is fixedly mounted on the rotating seat 7 and can rotate synchronously with the rotating seat 7 throughout its entire range, achieving synchronized angle adjustment of the clamp head, suture needle 4, and the transmission structure as a whole. This completely solves the shortcomings of traditional instruments, such as limited local swing angles and adjustment ranges. The rigid transmission push rod is arranged axially along the outer sheath 21 and can perform high-precision linear reciprocating sliding motion inside the outer sheath 21. The rigid material has no elastic tension, no deformation rebound, and no transmission lag, enabling precise one-to-one transmission of the handle's operating stroke to the front-end actuator. This completely overcomes the technical defects of traditional flexible wire rope transmission, such as force attenuation, transmission backlash, and operational misalignment, significantly improving transmission accuracy and suture controllability.

[0036] This invention adds an extended embodiment of flexible transmission combined with a universal adjustment seat, adapting to surgical conditions involving deep and complex surgical fields and requiring multi-angle bending to avoid organs. Specifically, a universal adjustment seat is configured at the front end of the sheath assembly 2, which is hinged to the end of the outer sheath 21, enabling multi-degree-of-freedom pitching and swinging of the front forceps head, with a swing angle of ±45°. The side wall of the universal adjustment seat is equipped with an independent angle locking structure, which can lock and fix the posture at any bending angle. Correspondingly, a non-rigid flexible transmission cable is configured as a transmission component 22. The flexible transmission cable is made of multiple strands of high-strength stainless steel wire twisted together, which has the characteristics of being able to bend arbitrarily with the universal adjustment seat and adapt to deformation. The cable is covered with a smooth, wear-resistant, and insulating protective layer, which can effectively reduce reciprocating sliding friction loss. When the universal adjustment seat causes the clamp head to bend and deflect, the flexible transmission cable can follow the bend and adapt synchronously, without the problems of rigid push rod jamming, jamming, or transmission failure. This ensures that the instrument can still complete the power transmission, clamp head opening and closing, and suture needle self-locking actions normally in the bent posture. It effectively solves the shortcomings of traditional rigid straight push instruments that cannot bend and cannot operate in blind spots, and achieves compatibility between straight head rigid precision suturing and bent head flexible adaptation suturing in two working conditions.

[0037] The clamp head assembly 3, as the core unit for suturing, adopts a structure where the lower clamp jaw 32 is fixedly installed and the upper clamp jaw 31 slides open and closes. The upper clamp jaw 31 can slide stably relative to the lower clamp jaw 32 axially, and the opening and closing process is smooth without jamming or offset. When it is necessary to install the suture needle 4, the upper clamp jaw 31 is pushed to slide relative to the lower clamp jaw 32, and the suture needle 4 is installed into the mounting groove 5311 opened on the lower clamp jaw 32. Then, the upper clamp jaw 31 is pushed back to its original position. Through the cooperation of the upper clamp jaw 31 and the lower clamp jaw 32, the suture needle 4 is limited. The clamp head assembly 3 integrates an original self-locking drive component. This mechanism is divided into three parts: a suturing drive component, a suturing transmission component, and a suturing locking component 53, forming a complete mechanical linkage self-locking system.

[0038] The sewing drive unit employs a gear and rack transmission principle, consisting of a transmission plate 511, a transmission rod 512, and a transmission gear. A dedicated transmission groove is formed inside the lower jaw 32. The transmission plate 511 is slidably mounted inside the transmission groove and fixedly connected to the end of a rigid transmission push rod. The transmission rod 512 is rotatably mounted on the side wall of the lower jaw 32, with its lower end extending into the transmission groove and fixing the transmission gear. Gear grooves are formed on the surface of the transmission plate 511 to precisely mesh with the transmission gear. When the rigid push rod drives the transmission plate 511 to slide axially, the gear and rack meshing action precisely converts the linear reciprocating motion into the rotational motion of the transmission rod 512, achieving precise power conversion. This results in high power transmission efficiency, fast response speed, and strong controllability.

[0039] The suture transmission component consists of a locking needle cam 521 and a linkage swing arm 522. The locking needle cam 521 is rotatably fitted into the jaw clamping groove of the lower jaw 32. One end of the linkage swing arm 522 is hinged to the locking needle cam 521, and the other end is connected to the suture locking component 53. The upper end of the transmission rod 512 is linked to the linkage swing arm 522. During power transmission, the rotation of the transmission rod 512 drives the linkage swing arm 522 to swing, which in turn drives the locking needle cam 521 to rotate eccentrically. Utilizing the cam profile compression principle, the tail of the suture needle 4 placed inside the jaw clamping groove is mechanically forced to clamp and lock, abandoning the traditional single friction clamping mode and achieving active mechanical self-locking. It has a large clamping force, high stability, and is not affected by the blood or tissue fluid infiltration environment.

[0040] The suture locking component 53, as the core structure for adaptive reset, includes a limiting slider 531, a limiting spring 532, and a limiting rod 533. A vertical limiting groove 5221 is provided on the linkage arm 522, and the limiting slider 531 is slidably assembled inside the limiting groove 5221, allowing it to adaptively slide vertically with the movement of the arm. An installation groove 5311 is provided at the lower end of the limiting slider 531 for housing the limiting spring 532. The limiting spring 532 is always kept in a compressed pre-tensioned state, continuously applying a vertically upward pre-tension force to the limiting slider 531, ensuring that the limiting rod 533 is normally fitted and locked inside the reset groove 41 in the needle 4, achieving multi-directional limiting and fixing of the needle 4. Typically, there are two reset grooves 41 in the needle 4, located at the needle tip and the needle tail, thereby ensuring that the limiting rod 533 can better limit the needle 4. The repositioning groove 41 adopts a special inclined slope structure design. The depth of the repositioning groove 41 gradually increases along the needle exit direction, so that the limiting rod 533 can adaptively slide off along the inclined slope during the process of the suture needle 4 completing tissue puncture and repositioning. No manual unlocking is required, realizing automatic repositioning of single suture and continuous seamless operation, which greatly simplifies the surgical operation process.

[0041] To further enhance the safety of preventing needle slippage, this invention adds a U-shaped elastic stop needle 6 inside the lower jaw 32. The lower jaw 32 has an embedding groove 321 to embed and fix the stop needle 6, and a V-shaped stop groove 42 is formed at the corresponding position of the suture needle 4. Under normal conditions, the end of the elastic stop needle 6 abuts against the inside of the V-shaped stop groove 42, forming a one-way locking structure. When the suture needle 4 is puncturing in the forward direction, the puncture force can squeeze the elastic stop needle 6 to deform and disengage from the stop groove 42 without affecting normal needle exit and suturing. When the suture needle 4 is subjected to suture tension or knot tension and has a reverse tendency to retreat, the U-shaped stop needle 6 and the V-shaped stop groove 42 lock and limit the movement, completely restricting the reverse slippage of the suture needle 4. Together with the suture locking element 53, it forms a two-way, all-round anti-slippage limiting system, eliminating the risk of needle slippage during surgery from a structural perspective.

[0042] In other embodiments, the upper and lower jaws 32 are arranged with inclined anti-slip ridges (not shown in the figure) on their inner sides, and the surface of the ridges is roughened by frosting, which greatly improves the friction coefficient of the jaw contact surface. This not only stabilizes the soft tissue and prevents slippage, but also further assists in limiting the suture needle 4. Together with the internal mechanical self-locking structure, it forms a double clamping protection inside and outside, which is suitable for complex surgical environments that are humid and lubricated.

[0043] Regarding instrument compatibility, the outer sheath 21 of this invention adopts a clinically common dual-outer-diameter design of 5mm and 6mm, which can be directly adapted to all conventional laparoscopic trocars on the market without the need for special instruments. It also features two standard rod lengths, 330mm and 450mm, respectively suitable for superficial minimally invasive surgery, pediatric surgery, and complex deep abdominal and pelvic surgeries. The accompanying suture needle 4 uses 1 / 2 arc and 3 / 8 arc medical standard curved needles, compatible with all sizes of medical sutures from 2-0 to 5-0. The tail size of the suture needle 4 precisely matches the self-locking clamping gap, and this multi-size compatibility design greatly improves the instrument's versatility and clinical adaptability.

[0044] In actual clinical practice, the surgeon holds the fixed handle 11 and pinches the movable handle 12. Relying on the crank-slider connection structure between the handle and the transmission component 22, the swinging power is precisely converted into axial linear thrust, driving the rigid transmission push rod or flexible transmission cable to move axially. In the rigid transmission mode, the power is converted by the gear and rack structure to drive the locking cam 521 to complete the self-locking fixation of the suture needle 4, which is suitable for precise linear suturing scenarios. In the flexible transmission and universal seat mode, it can adapt to the multi-angle bending posture of the front end and complete the close suturing of deep dead angle areas. After the instrument suturing and puncture is completed, the limiting rod 533 is automatically released and reset by the inclined reset groove 41. At the same time, the U-shaped needle stop 6 prevents the suture needle 4 from falling back throughout the process. The overall angle of the instrument can be freely rotated or the posture of the front clamp head can be adjusted according to the needs of the surgical field. It is locked and fixed by the corresponding locking structure, realizing continuous, stable and safe fine suturing operations in complex surgical fields.

[0045] This invention innovatively constructs a precise transmission system combining rigid direct-drive transmission with gear and rack power conversion, completely solving the technical problems of transmission backlash, force attenuation, and operational misalignment inherent in traditional flexible transmission structures. It achieves lossless, high-precision, and one-to-one accurate power transmission, significantly improving the controllability of suture force and suture uniformity. Through the integration of a multi-level mechanical limiting structure with cam-linked self-locking, elastic adaptive reset, and U-shaped unidirectional anti-retraction, it overcomes the limitations of traditional passive friction clamping, achieving fully automated closed-loop operation with active mechanical locking of the suture needle 4, automatic postoperative reset, and unidirectional anti-dislodgement throughout the entire process. This eliminates the clinical risks of suture needle 4 slippage, displacement, and dislodgement, significantly improving suture uniformity. Enhances surgical safety and suture stability; Utilizing a 360° rotatable and lockable rotating base 7 structure, the instrument's overall posture can be adjusted at multiple angles, perfectly adapting to the delicate suturing needs of deep, dead angles, and complex and restricted surgical fields, significantly improving the instrument's operational flexibility and clinical applicability; Combined with a frosted anti-slip forceps structure, standardized multi-specification sheaths, and fully compatible medical suture needles 4, the instrument can adapt to humid and complex surgical environments, different surgical depths, and multi-departmental clinical scenarios. The overall structure is simple and compact, with high reliability due to pure mechanical linkage, and is suitable for single-use, low-cost mass production, effectively simplifying surgical procedures, reducing surgeon fatigue, and shortening surgical time.

[0046] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A modular, detachable, disposable laparoscopic suture stapler assembly, comprising a handle assembly (1), a sheath assembly (2), a clamp head assembly (3), and a suture needle (4), wherein the handle assembly (1) comprises a fixed handle (11) and a movable handle (12) hinged to the fixed handle (11); the sheath assembly (2) comprises an outer sheath (21) and a transmission assembly (22) passing through the outer sheath (21), one end of the transmission assembly (22) being connected to the movable handle (12); the clamp head assembly (3) comprises an upper clamp jaw (31) and a lower clamp jaw (32), the lower clamp jaw (32) being mounted on the outer sheath (21), and the upper clamp jaw (31) being movably mounted on the lower clamp jaw (32) and capable of sliding relative to the lower clamp jaw (32), characterized in that: The clamp assembly (3) is provided with a self-locking drive component, which includes a sew-driving component, a sew-transmission component and a sew-locking component (53). The sew-driving component is connected to the other end of the transmission component (22). The sew-transmission component is installed on the sew-driving component. The sew-transmission component can drive the sew needle (4) and make the sew needle (4) perform sew-making operations under the drive of the sew-driving component. The sew-locking component (53) is installed on the sew-transmission component and locks the sew needle (4) to prevent the sew needle (4) from falling off and slipping.

2. The modular, detachable, disposable laparoscopic suture stapler assembly according to claim 1, characterized in that: The sewing transmission component includes a locking needle cam (521) and a linkage arm (522). The locking needle cam (521) is rotatably mounted inside the jaw clamping groove of the lower jaw (32). The locking needle cam (521) is connected to the transmission component (22) at one end away from the handle assembly (1). One end of the linkage arm (522) is hinged to the locking needle cam (521).

3. The modular, detachable, disposable laparoscopic suture stapler assembly according to claim 2, characterized in that: The stitching locking component (53) includes a limiting slider (531) and a limiting spring (532). A limiting groove (5221) is provided on the linkage swing arm (522) corresponding to the limiting slider (531). The limiting slider (531) is slidably disposed in the limiting groove (5221) and can slide up and down in the limiting groove (5221). An installation groove (5311) is provided at the lower end of the limiting slider (531). The limiting spring (532) is installed in the installation groove (5311) and can apply a vertical force to the limiting slider (531). A limiting rod (533) is installed at the upper end of the limiting slider (531). The lower jaw (32) is provided with a guide groove (322) corresponding to the arc of the needle (4). The limiting rod (533) is provided through the guide groove (322) and can move in the guide groove (322). The needle (4) is provided with a reset groove (41). One end of the limiting rod (533) that extends through the guide groove (322) can be engaged in the reset groove (41). The reset groove (41) is inclined on the side wall opposite to the needle exit direction. The depth of the reset groove (41) gradually increases along the needle exit direction, so as to ensure that after the needle (4) completes a single sewing operation, the limiting rod (533) can slide out along the inclined side wall of the reset groove (41).

4. The modular, detachable, disposable laparoscopic suture stapler assembly according to claim 3, characterized in that: It also includes a stop needle (6), which is U-shaped. The lower jaw (32) is provided with an embedding groove (321) corresponding to the stop needle (6). The stop needle (6) is installed in the embedding groove (321). The sewing needle (4) is provided with a stop groove (42) corresponding to the stop needle (6). The stop groove (42) is V-shaped. One end of the stop needle (6) can abut in the stop groove (42). The stop needle (6) is made of elastic material to ensure that the stop needle (6) can slide out of the stop groove (42) when the sewing needle (4) comes out, while avoiding the sewing needle (4) from moving in the opposite direction.

5. A modular, detachable, disposable laparoscopic suture stapler assembly according to claim 2, characterized in that: The transmission assembly (22) is configured as a rigid transmission push rod, which is installed along the axial direction of the outer sheath (21) and can make linear reciprocating motion along the axial direction of the outer sheath (21). The two ends of the rigid transmission push rod are respectively connected to the movable handle (12) and the linkage swing arm (522).

6. A modular, detachable, disposable laparoscopic suture stapler assembly according to claim 1 or 5, characterized in that: The sewing drive includes a transmission plate (511) and a transmission rod (512). A transmission groove is provided in the lower jaw (32). The transmission plate (511) is slidably disposed on the transmission groove, and the lower end of the transmission rod (512) is inserted into the transmission groove. A transmission gear is installed at the lower end of the transmission rod (512). A toothed groove is provided on the transmission plate (511), and the transmission gear meshes in the toothed groove. As the transmission plate (511) slides in the transmission groove, it drives the transmission rod (512) to rotate. The upper end of the transmission rod (512) is connected to the sewing drive.

7. The modular, detachable, disposable laparoscopic suture stapler assembly according to claim 1, characterized in that: It also includes a rotating seat (7), which is rotatably connected to a fixed handle (11). The outer sheath (21) is mounted on the rotating seat (7), and the transmission assembly (22) passes through the rotating seat (7) and is connected to the movable handle (12). The transmission assembly (22) can rotate relative to the movable handle (12) as the universal adjustment rotates. A locking member (8) for locking the rotation action is installed on the rotating seat (7).

8. A modular, detachable, disposable laparoscopic suture stapler assembly according to claim 1, characterized in that: The inner sidewalls of the upper jaw (31) and the lower jaw (32) are arranged in an array with multiple sets of inclined anti-slip ridges. The surface of the anti-slip ridges is frosted to increase the clamping friction of the jaws.

9. A modular, detachable, disposable laparoscopic suture stapler assembly according to claim 1, characterized in that: The outer diameter of the outer sheath tube (21) is set to 5mm or 6mm, and the outer sheath tube (21) is configured with two length specifications of 330mm and 450mm.

10. A modular, detachable, disposable laparoscopic suture stapler assembly according to claim 1, characterized in that: The tail size of the sewing needle (4) is matched with the clamping gap of the clamping groove of the pliers and the locking cam (521).

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