Rolling needle holder

Abstract

This application discloses a roller-type needle holder, comprising: a housing; a clamping mechanism, the clamping mechanism including a first clamping arm and a second clamping arm, the first clamping arm including a rotary drive source, a first connecting shaft, a first transmission gear and a first roller clamp, the rotary drive source being disposed in the housing and drivenly connected to the first connecting shaft, the first roller clamp being disposed at the end of the first connecting shaft away from the housing, and the first transmission gear being sleeved on the first connecting shaft; the second clamping arm including an axial drive assembly, a second connecting shaft, a second transmission gear and a second roller clamp, the axial drive assembly being disposed in the housing, the second connecting shaft being connected to the axial drive assembly and arranged parallel to the first connecting shaft, the second roller clamp being movably connected to the end of the second connecting shaft away from the housing, and the second transmission gear being sleeved on the second roller clamp.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a roller-type needle holder. Background Technology

[0002] In minimally invasive surgical procedures, such as laparoscopic and thoracoscopic surgery, tissue suturing is one of the most basic, commonly used, and also highly challenging techniques. Because surgical instruments need to enter the body cavity through narrow puncture channels, the operating space is limited, making it difficult to directly apply suturing techniques used in traditional open surgery.

[0003] Currently, various instruments for assisting laparoscopic suturing have been proposed. For example, Chinese patent document CN115153698A discloses a tissue suturing system, which includes a first roller, a second roller, a first power device, a second power device, and a suture needle. In this system, the first roller and the second roller can be positioned relatively close to each other to clamp a bent suture needle, and the active rotation of at least one roller drives the suture needle to enter and exit the tissue in the direction of its curvature, thereby completing the suturing operation.

[0004] However, careful analysis reveals that the technical solutions disclosed in the aforementioned documents have obvious problems of insufficient disclosure, making it difficult for those skilled in the art to implement usable surgical instruments based on the described contents.

[0005] Specifically, while the aforementioned documents mention the concepts of "first power unit" and "second power unit," they do not disclose their assembly and kinematic relationships with other components. It is unclear how the two rollers are clamped, how the rollers rotate, and how the various structures avoid interference. This insufficient disclosure means the described technical solution remains only a concept and cannot be directly transformed into a manufacturable, assemblable, and usable product. Those skilled in the art who wish to implement a surgical instrument capable of clamping and driving a suture needle based on this document would still need to engage in extensive structural design and creative effort. Summary of the Invention

[0006] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a roller-type needle holder.

[0007] According to some embodiments of this application, a roller-type needle holder includes: a housing; a clamping mechanism, the clamping mechanism including a first clamping arm and a second clamping arm, the first clamping arm including a rotary drive source, a first connecting shaft, a first transmission gear and a first roller clamp, the rotary drive source being disposed in the housing and drivenly connected to the first connecting shaft, the first connecting shaft extending from the housing to the outside of the housing, the first roller clamp being disposed at the end of the first connecting shaft away from the housing, and the first transmission gear being sleeved on the first connecting shaft; the second clamping arm including an axial drive assembly, a second connecting shaft, a second transmission gear and a second roller clamp, the axial drive assembly being disposed in the housing, the second connecting shaft being connected to the axial drive assembly and arranged parallel to the first connecting shaft, the axial drive... The component can be operated to control the second connecting shaft to move axially along the second connecting shaft. The second roller clamp is movably connected to the end of the second connecting shaft away from the housing. The second transmission gear is sleeved on the second roller clamp. When the second connecting shaft is controlled by the axial drive component to move in a first direction, it drives the second roller clamp to open with the first roller clamp. When the second connecting shaft is controlled by the axial drive component to move in a second direction, it drives the second roller clamp to close with the first roller clamp and causes the second transmission gear to mesh with the first transmission gear. When the second transmission gear meshes with the first transmission gear, the second roller clamp can be driven by the first roller clamp to rotate. The first direction is opposite to the second direction and both are parallel to the axial direction of the second connecting shaft.

[0008] The roller-type needle holder according to the embodiments of this application has at least the following beneficial effects: In the roller-type needle holder of this invention: In the initial state, the first and second roller clamps are open, and the second transmission gear is separated from the first transmission gear. The operator can place the suture needle between the first and second roller clamps. Then, the operator operates the axial drive assembly to move the second connecting shaft along a second direction, driving the second roller clamp to close with the first roller clamp until the suture needle is clamped. At this point, the second transmission gear meshes with the first transmission gear. Subsequently, if the suture needle needs to be punctured, the operator can activate the rotation drive source. The first connecting shaft begins to rotate, and the first transmission gear rotates accordingly. Through gear meshing, the second transmission gear drives the second roller clamp to rotate synchronously, thus achieving rotation of the suture needle while it is clamped. When it is necessary to release the suture needle, the operator can reverse the axial drive assembly to move the second connecting shaft along a first direction, causing the second roller clamp to open. Furthermore, in the roller-type needle holder of this application, when the axial drive assembly drives the second connecting shaft to move along the second direction, it first drives the second roller clamp to close with the first roller clamp, thus clamping the suture needle. Simultaneously with the closure, the second transmission gear fixed on the second roller clamp engages with the first transmission gear fixed on the first connecting shaft, thereby connecting the rotational power transmission path from the rotary drive source to the second roller clamp. Through this design, the completion of the clamping action and the connection of the rotational transmission path are logically linked through the same axial movement, eliminating the need for additional clutch mechanisms or complex control logic. This not only simplifies the internal structure of the instrument, reduces the number of parts, lowers manufacturing costs and the risk of failure, but more importantly, ensures that rotational power is effectively transmitted to the second roller clamp only when it is clamped in place, preventing the second roller clamp from spinning idly or rotating ineffectively. At the same time, this design allows the second and first roller clamps to be synchronously driven to rotate by the rotary drive source while clamped, achieving precise rotational adjustment of the clamped suture needle.

[0009] According to some embodiments of this application, the roller-type needle holder further includes a protective sleeve, which is connected to the housing and sleeved over the first connecting shaft and the second connecting shaft.

[0010] According to some embodiments of this application, the second clamping arm further includes a support frame, which is rotatably connected to the end of the protective sleeve away from the housing. The support frame is used to support the second roller clamp, and the second roller clamp and the second transmission gear can rotate together relative to the support frame about the axis of the second roller clamp. The second clamping arm further includes a connecting assembly, one end of which is rotatably connected to the end of the second connecting shaft away from the housing, and the other end of which is rotatably connected to the support frame.

[0011] According to some embodiments of this application, the support frame is rotatably connected to the end of the protective sleeve away from the housing via a first rotating shaft, and the axis of the first rotating shaft is perpendicular to the axis of the second connecting shaft; One end of the connecting component is rotatably connected to the end of the second connecting shaft away from the housing via a second rotating shaft, the axis of which is perpendicular to the axis of the second connecting shaft. The other end of the connecting component is rotatably connected to the support frame via a third rotating shaft, the axis of which is perpendicular to the axis of the second connecting shaft.

[0012] According to some embodiments of this application, the protective sleeve is provided with a radial limiting member inside. The radial limiting member has a first radial limiting hole and a second radial limiting hole arranged parallel to each other. The first connecting shaft passes through the first radial limiting hole, and the second connecting shaft passes through the second radial limiting hole.

[0013] According to some embodiments of this application, the axial drive assembly includes an operating handle and a transmission unit. The operating handle is rotatably connected to the housing, the drive end of the operating handle extends into the housing, the gripping end of the operating handle extends into the housing, the transmission unit is disposed in the housing and is drively connected to the drive end of the operating handle, and the transmission unit is drively connected to the second connecting shaft.

[0014] According to some embodiments of this application, the transmission unit includes a transmission rod and an adapter rod. The transmission rod is disposed in the housing, parallel to the second connecting shaft, and capable of moving along its axial direction. One end of the transmission rod is movably connected to the drive end of the operating handle. The adapter rod is rotatably disposed in the housing, with one end movably connected to the other end of the transmission rod and the other end movably connected to the second connecting shaft.

[0015] According to some embodiments of this application, the driving end of the operating handle is provided with a first strip-shaped hole extending along the length direction of the operating handle, and one end of the transmission rod is provided with a first guide rod passing through the first strip-shaped hole; one end of the adapter rod is provided with a second strip-shaped hole extending along the axial direction of the adapter rod, and the other end of the transmission rod is provided with a second guide rod passing through the second strip-shaped hole; the other end of the adapter rod is provided with a third strip-shaped hole extending along the axial direction of the adapter rod, and the end of the second connecting shaft away from the second roller clamp is provided with a third guide rod passing through the third strip-shaped hole.

[0016] According to some embodiments of this application, the rotation drive source is an electric motor.

[0017] According to some embodiments of this application, the sidewall of the first roller clamp is provided with a plurality of first annular grooves spaced apart along its axial direction; the sidewall of the second roller clamp is provided with a plurality of second annular grooves spaced apart along its axial direction; the plurality of first annular grooves and the plurality of second annular grooves are arranged opposite each other in a one-to-one correspondence when the first roller clamp and the second roller clamp are closed.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of a roller-type needle holder according to an embodiment of this application; Figure 2 for Figure 1 A magnified view of a portion of the figure shown; Figure 3 This is a cross-sectional view of a roller-type needle holder according to an embodiment of this application; Figure 4 for Figure 3 A magnified view of a portion of the figure shown; Figure 5 for Figure 3 Another enlarged view of the figure shown; Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0020] Icon labels: 100. Shell; 200. Clamping mechanism; 210. First clamping arm; 211. Rotary drive source; 212. First connecting shaft; 213. First roller clamp; 2131. First annular groove; 214. First transmission gear; 220. Second clamping arm; 221. Axial drive assembly; 2211. Operating handle; 22111. First slotted hole; 2212. Transmission unit; 22121. Transmission rod; 22122. Adapter rod; 221221. Second slotted hole; 222. Second connecting shaft; 223. Second roller clamp; 2231. Second annular groove; 224. Second transmission gear; 225. Support frame; 226. Connecting assembly; 227. First rotating shaft; 228. Second rotating shaft; 229. Third rotating shaft; 300. Protective sleeve; 400. Radial limiting component; 500, battery. Detailed Implementation

[0021] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0022] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application 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 application. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] like Figure 1 As shown, the roller-type needle holder provided in one embodiment of this application is mainly used in minimally invasive surgical procedures, such as laparoscopic surgery and thoracoscopic surgery.

[0025] Combination Figure 1 and Figure 3 The roller-type needle holder includes a housing 100 and a clamping mechanism 200.

[0026] The housing 100 serves as the gripping base for the entire roller-type needle holder and the mounting carrier for related components. It is designed with an ergonomic handle shape for easy one-handed operation by the doctor. The housing 100 has a hollow internal structure, and a through hole is provided at the front end of the housing 100 (i.e., the end closest to the surgical area).

[0027] Combination Figure 2 and Figure 4The clamping mechanism 200 includes a first clamping arm 210 and a second clamping arm 220. The first clamping arm 210 and the second clamping arm 220 cooperate to clamp or release the suture needle. When the first clamping arm 210 and the second clamping arm 220 clamp the suture needle, they can also drive the suture needle to move to perform a puncture action.

[0028] Combination Figure 2 , Figure 4 and Figure 5 The first clamping arm 210 includes a rotary drive source 211, a first connecting shaft 212, a first roller clamp 213, and a first transmission gear 214. The rotary drive source 211, located inside the housing 100, can be a motor, such as a micro DC motor, stepper motor, or servo motor, powered by a battery 500 located inside the housing 100. The rotary drive source 211 is driven to move the first connecting shaft 212 around its axis. Specifically, the output shaft of the rotary drive source 211 is driven to the first connecting shaft 212 via a coupling or other type of connector. The first connecting shaft 212 extends from inside the housing 100 to the outside of the housing 100, passing through a through-hole at the front end of the housing 100. The first roller clamp 213 is disposed at the end of the first connecting shaft 212 away from the housing 100. The first roller clamp 213 is coaxially disposed with the first connecting shaft 212. When the first connecting shaft 212 rotates under the drive of the rotary drive source 211, it drives the first roller clamp 213 to rotate together. The first roller clamp 213 can be fixedly sleeved on the end of the first connecting shaft 212 away from the housing 100. The first roller clamp 213 and the first connecting shaft 212 can be interference fit, adhesive fit, weld fit, or fixed with other fasteners. The first transmission gear 214 is disposed on the first connecting shaft 212, located near the first roller clamp 213 and outside the housing 100. Specifically, the first transmission gear 214 is sleeved on the first connecting shaft 212 and coaxially disposed with the first connecting shaft 212, and can rotate together with the first connecting shaft 212. More specifically, the first transmission gear 214 and the first connecting shaft 212 can be connected by a key, spline, or interference fit to ensure that the two can rotate synchronously.

[0029] Combination Figure 2 , Figure 4 and Figure 5 The second clamping arm 220 includes an axial drive assembly 221, a second connecting shaft 222, a second transmission gear 224, and a second roller clamp 223.

[0030] An axial drive assembly 221 is disposed within the housing 100. The axial drive assembly 221 can be a mechanical handle drive structure, or an electric (such as a linear motor) or pneumatic structure. One end of the second connecting shaft 222 is located inside the housing 100 and connected to the axial drive assembly 221. The second connecting shaft 222 can move along its own axial direction under the drive of the axial drive assembly 221. The other end of the second connecting shaft 222 extends outward from the housing 100 through a through hole at the front end of the housing 100. The second connecting shaft 222 and the first connecting shaft 212 are arranged side-by-side, both being slender shafts and approximately parallel. Furthermore, a second roller clamp 223 is movably connected to the end of the second connecting shaft 222 away from the housing 100. It should be noted that the second roller clamp 223 being movably connected to the end of the second connecting shaft 222 away from the housing 100 means that the second roller clamp 223 can swing relative to the second connecting shaft 222 to open and close with the first roller clamp 213, and the second roller clamp 223 can also rotate relative to the second connecting shaft 222 about its own axis. The second transmission gear 224 is sleeved on the second roller clamp 223. Specifically, the second transmission gear 224 is fixedly connected to the second roller clamp 223 and is coaxial with the second roller clamp 223. The axial drive assembly 221 can be operated to control the movement of the second connecting shaft 222 along the axial direction of the second connecting shaft 222. Two directions are defined here: a first direction (such as a backward direction) and a second direction (such as a forward direction). The first direction is opposite to the second direction and both are parallel to the axial direction of the second connecting shaft 222. When the second connecting shaft 222 moves along the first direction under the control of the axial drive assembly 221, it drives the second roller clamp 223 to open relative to the first roller clamp 213; when the second connecting shaft 222 moves along the second direction under the control of the axial drive assembly 221, it drives the second roller clamp 223 to close with the first roller clamp 213, and when they are closed, the second transmission gear 224 and the first transmission gear 214 mesh together.

[0031] It should be noted that the sidewall of the first roller clamp 213 is provided with a plurality of first annular grooves 2131 arranged at intervals along its axial direction, and the sidewall of the second roller clamp 223 is correspondingly provided with a plurality of second annular grooves 2231. When the axial drive assembly 221 drives the second connecting shaft 222 to move in the second direction, causing the second roller clamp 223 to close with the first roller clamp 213, the plurality of first annular grooves 2131 and the plurality of second annular grooves 2231 are arranged opposite each other in a one-to-one manner, together forming a constraint channel for the suture needle to pass through. It can be understood that when the suture needle is passed between the oppositely arranged first annular grooves 2131 and second annular grooves 2231, the sidewall of the groove forms a lateral constraint on the suture needle. This constraint can effectively resist the axial component force generated by tissue resistance, prevent the suture needle from axially deviating during the driving process, and ensure that it moves strictly along the predetermined trajectory.

[0032] In the roller-type needle holder of the present invention: in the initial state, the first roller clamp 213 and the second roller clamp 223 are in an open state, and the second transmission gear 224 is separated from the first transmission gear 214. The operator can place the suture needle between the first roller clamp 213 and the second roller clamp 223. Then, the operator operates the axial drive assembly 221 to move the second connecting shaft 222 along the second direction, driving the second roller clamp 223 to close with the first roller clamp 213 until the suture needle is clamped. At this time, the second transmission gear 224 is exactly engaged with the first transmission gear 214. Subsequently, if the suture needle needs to perform a puncture action, the operator can start the rotation drive source 211. The first connecting shaft 212 starts to rotate, and the first transmission gear 214 rotates accordingly. Through gear meshing, the second transmission gear 224 drives the second roller clamp 223 to rotate synchronously, thereby realizing the rotation of the suture needle in the clamped state. When it is necessary to loosen the suture needle, the operator can reverse the axial drive assembly 221 to move the second connecting shaft 222 along the first direction, thereby opening the second roller clamp 223.

[0033] Combination Figure 1 , Figure 2 and Figure 4 In some embodiments, the roller-type needle holder also includes a protective sleeve 300, which is connected to the housing 100 and sleeved over the first connecting shaft 212 and the second connecting shaft 222. Specifically, the protective sleeve 300 is a tubular structure, with one end fixedly connected to the front end of the housing 100 and communicating with a through hole at the front end of the housing 100, and the other end extending away from the housing 100. The protective sleeve 300 sleeves the first connecting shaft 212 and the second connecting shaft 222 inside it, forming a protective barrier. The protective sleeve 300 can prevent external instruments from accidentally scratching and damaging the first connecting shaft 212 and the second connecting shaft 222, thereby improving the reliability and service life of the roller-type needle holder.

[0034] Combination Figure 2 and Figure 4 Furthermore, the second clamping arm 220 also includes a support frame 225 and a connecting assembly 226. The support frame 225 is rotatably connected to the end of the protective sleeve 300 away from the housing 100. The support frame 225 is used to support the second roller clamp 223. The second roller clamp 223 and the second transmission gear 224 can rotate together relative to the support frame 225 about the axis of the second roller clamp 223. One end of the connecting assembly 226 is rotatably connected to the end of the second connecting shaft 222 away from the housing 100, and the other end of the connecting assembly 226 is rotatably connected to the support frame 225.

[0035] Specifically, the support frame 225 is rotatably connected to the end of the protective sleeve 300 away from the housing 100 via the first rotating shaft 227. The axis of the first rotating shaft 227 is perpendicular to the axis of the second connecting shaft 222. The support frame 225 can swing around the axis of the first rotating shaft 227. The main function of the support frame 225 is to serve as the mounting base for the second roller clamp 223. The second roller clamp 223 is rotatably mounted on the support frame 225. The second roller clamp 223 can rotate relative to the support frame 225 around its axis. For example, the second roller clamp 223 can be mounted on the support frame 225 via bearings or bushings, allowing it to rotate freely around its own axis while being supported and limited by the support frame 225. The connecting assembly 226 connects the second connecting shaft 222 and the support frame 225. One end of the connecting assembly 226 is rotatably connected to the end of the second connecting shaft 222 away from the housing 100, for example, via a second rotating shaft 228, the axis of which is perpendicular to the axis of the second connecting shaft 222. This allows the connecting assembly 226 to rotate relative to the second connecting shaft 222 about the axis of the second rotating shaft 228. The other end of the connecting assembly 226 is rotatably connected to the support frame 225, for example, via a third rotating shaft 229, the axis of which is perpendicular to the axis of the second connecting shaft 222. This allows the support frame 225 to rotate relative to the connecting assembly 226 about the axis of the third rotating shaft 229. It is understood that when the second connecting shaft 222 moves axially under the drive of the axial drive assembly 221, the connecting assembly 226 will move accordingly. Specifically, if the second connecting shaft 222 moves in the first direction (reverse), the connecting assembly 226 pulls the support frame 225 backward, causing the support frame 225 to swing around the first rotating shaft 227 away from the first connecting shaft 212, thereby causing the second roller clamp 223 to open. Conversely, if the second connecting shaft 222 moves in the second direction (forward), the connecting assembly 226 pushes the support frame 225, causing the support frame 225 to swing around the first rotating shaft 227 towards the first connecting shaft 212, thereby causing the second roller clamp 223 to close with the first roller clamp 213. It can be understood that the above structure can efficiently and smoothly convert the axial linear motion of the second connecting shaft 222 into the swinging motion of the second roller clamp 223, and can generate sufficient clamping force.

[0036] Combination Figure 5 and Figure 6 In some embodiments, a radial limiting member 400 is provided inside the protective sleeve 300, the shape of which matches the inner wall of the protective sleeve 300 so that it can be securely installed therein. The radial limiting member 400 has a first radial limiting hole and a second radial limiting hole arranged in parallel. The first connecting shaft 212 passes through the first radial limiting hole, and the second connecting shaft 222 passes through the second radial limiting hole.

[0037] Specifically, the diameters of the first radial limiting hole and the second radial limiting hole are slightly larger than the outer diameters of the first connecting shaft 212 and the second connecting shaft 222, respectively, so that the first connecting shaft 212 can rotate freely in the first radial limiting hole and the second connecting shaft 222 can move freely axially in the second radial limiting hole. However, the first radial limiting hole can restrict the radial movement of the first connecting shaft 212 and the second radial limiting hole can restrict the radial movement of the second connecting shaft 222, ensuring the parallelism of the first connecting shaft 212 and the second connecting shaft 222. This is crucial for ensuring that the second transmission gear 224 can accurately mesh with the first transmission gear 214 when the first roller clamp 213 and the second roller clamp 223 are closed, avoiding gear misalignment, poor meshing, or even damage caused by radial offset.

[0038] like Figure 5 As shown, in a specific embodiment, the axial drive assembly 221 adopts a mechanical handle drive structure. The axial drive assembly 221 includes an operating handle 2211 and a transmission unit 2212. The operating handle 2211 is rotatably connected to the housing 100. One end of the operating handle 2211 extends into the housing 100, and the other end of the operating handle 2211 extends out of the housing 100. The transmission unit 2212 is disposed in the housing 100 and is drively connected to one end of the operating handle 2211. The transmission unit 2212 is drively connected to the second connecting shaft 222.

[0039] Specifically, the operating handle 2211 is rotatably connected to the housing 100 via a pivot. The operating handle 2211 can be integral, with one end (i.e., the drive end) extending into the housing 100 to drive the transmission unit 2212, and the other end (i.e., the grip end) extending out of the housing 100 for operation by the doctor's fingers. When the doctor rotates the grip end of the operating handle 2211, its drive end will move in the opposite direction around the pivot. The transmission unit 2212 is located inside the housing 100, and is tractively connected to the drive end of the operating handle 2211 and to the second connecting shaft 222. The function of the transmission unit 2212 is to convert the rotational oscillation of the operating handle 2211 into linear movement of the second connecting shaft 222 along its axial direction.

[0040] More specifically, the transmission unit 2212 includes a transmission rod 22121 and a transition rod 22122. The transmission rod 22121 is disposed within the housing 100, and is arranged parallel to the second connecting shaft 222. The transmission rod 22121 is movable along its axial direction, and one end of the transmission rod 22121 is movably connected to the drive end of the operating handle 2211. The transition rod 22122 is rotatably disposed within the housing 100, and one end of the transition rod 22122 is movably connected to the other end of the transmission rod 22121. The other end of the transition rod 22122 is movably connected to the second connecting shaft 222. Understandably, the adapter rod 22122 is a lever with a fulcrum in the middle, which is rotatably connected to the inside of the housing 100 via a pivot. One end of the adapter rod 22122 is movably connected to the end of the transmission rod 22121 away from the operating handle 2211, and the other end of the adapter rod 22122 is movably connected to the end of the second connecting shaft 222 near the housing 100. When the operating handle 2211 is gripped, its driving end pushes the transmission rod 22121 to move in the second direction. The transmission rod 22121 then pushes the adapter rod 22122 to rotate around its fulcrum. The second end of the adapter rod 22122 moves in the opposite direction, pulling the second connecting shaft 222 to move in the first direction, thereby opening the clamp. Conversely, when the operating handle 2211 is released and the transmission rod 22121 rotates in the opposite direction, the end of the adapter rod 22122 near the second connecting shaft 222 pushes the second connecting shaft 222 to move in the second direction, thereby closing the clamps.

[0041] It should be noted that, on the drive end of the operating handle 2211 that extends into the housing 100, a first strip-shaped hole 22111 extending along the length of the operating handle 2211 is provided. A first guide rod is provided at the end of the transmission rod 22121 near the operating handle 2211, and this first guide rod passes through the first strip-shaped hole 22111. At the end of the adapter rod 22122 near the transmission rod 22121, a second strip-shaped hole 221221 extending along the axial direction of the adapter rod 22122 is provided. A second guide rod is connected to the end of the transmission rod 22121 away from the operating handle 2211, and this second guide rod passes through the second strip-shaped hole 221221. At the end of the adapter rod 22122 near the second connecting shaft 222, a third strip-shaped hole extending along the axial direction of the adapter rod 22122 is provided. A third guide rod is connected to the end of the second connecting shaft 222 near the housing 100, and this third guide rod passes through the third strip-shaped hole.

[0042] One end of the operating handle 2211 is provided with a first strip-shaped hole 22111 extending along the length direction of the operating handle 2211, and one end of the transmission rod 22121 is provided with a first guide rod passing through the first strip-shaped hole 22111; one end of the adapter rod 22122 is provided with a second strip-shaped hole 221221 extending along the axial direction of the adapter rod 22122, and the other end of the transmission rod 22121 is provided with a second guide rod passing through the second strip-shaped hole 221221, and the other end of the adapter rod 22122 is provided with a third strip-shaped hole extending along the axial direction of the adapter rod 22122; the end of the second connecting shaft 222 away from the second roller clamp 223 is provided with a third guide rod passing through the third strip-shaped hole.

[0043] Understandably, in the above design, the connection between the transmission rod 22121, the adapter rod 22122, and the second connecting shaft 222 is a sliding hinge. During the movement of each component, the guide rod can slide freely in the corresponding slot, thereby eliminating the internal stress caused by the misalignment of the movement direction or manufacturing error, and ensuring the smoothness and reliability of the transmission chain.

[0044] In the roller-type needle holder of this application, when the axial drive assembly 221 drives the second connecting shaft 222 to move along the second direction, it first drives the second roller clamp 223 to close with the first roller clamp 213, thereby clamping the suture needle. Simultaneously with the closure, the second transmission gear 224 fixed on the second roller clamp 223 engages with the first transmission gear 214 fixed on the first connecting shaft 212, thus connecting the rotational power transmission path from the rotational drive source 211 to the second roller clamp 223. Through this design, the completion of the clamping action and the connection of the rotational transmission path are logically linked through the same axial movement, eliminating the need for additional clutch mechanisms or complex control logic. This not only simplifies the internal structure of the instrument, reduces the number of parts, lowers manufacturing costs and the risk of failure, but more importantly, ensures that rotational power is effectively transmitted to the second roller clamp 223 only when the clamp is in place, preventing the second roller clamp 223 from spinning idly or rotating ineffectively. Meanwhile, this design enables the second roller clamp 223 and the first roller clamp 213 to be synchronously driven to rotate by the rotation drive source 211 when they are clamped, thereby achieving precise rotational adjustment of the clamped suture needle.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A roller-type needle holder, characterized in that, include: case; A clamping mechanism includes a first clamping arm and a second clamping arm. The first clamping arm includes a rotary drive source, a first connecting shaft, a first transmission gear, and a first roller clamp. The rotary drive source is disposed in the housing and drivenly connected to the first connecting shaft, which extends from the housing to the outside of the housing. The first roller clamp is disposed at the end of the first connecting shaft away from the housing, and the first transmission gear is sleeved on the first connecting shaft. The second clamping arm includes an axial drive assembly, a second connecting shaft, a second transmission gear, and a second roller clamp. The axial drive assembly is disposed in the housing, and the second connecting shaft is connected to the axial drive assembly and arranged parallel to the first connecting shaft. The axial drive assembly can be operated to control the... The second connecting shaft moves axially along the second connecting shaft. The second roller clamp is movably connected to the end of the second connecting shaft away from the housing. The second transmission gear is sleeved on the second roller clamp. When the second connecting shaft moves along the first direction under the control of the axial drive assembly, it drives the second roller clamp to open with the first roller clamp. When the second connecting shaft moves along the second direction under the control of the axial drive assembly, it drives the second roller clamp to close with the first roller clamp and makes the second transmission gear mesh with the first transmission gear. When the second transmission gear meshes with the first transmission gear, the second roller clamp can be driven by the first roller clamp to rotate. The first direction is opposite to the second direction and both are parallel to the axial direction of the second connecting shaft.

2. The roller-type needle holder according to claim 1, characterized in that, It also includes a protective sleeve, which is connected to the housing and sleeved over the first connecting shaft and the second connecting shaft.

3. The roller-type needle holder according to claim 2, characterized in that, The second clamping arm also includes a support frame, which is rotatably connected to the end of the protective sleeve away from the housing. The support frame is used to support the second roller clamp, and the second roller clamp and the second transmission gear can rotate together relative to the support frame about the axis of the second roller clamp. The second clamping arm further includes a connecting assembly, one end of which is rotatably connected to the end of the second connecting shaft away from the housing, and the other end of which is rotatably connected to the support frame.

4. The roller-type needle holder according to claim 3, characterized in that, The support frame is rotatably connected to the end of the protective sleeve away from the housing via a first rotating shaft, the axis of the first rotating shaft being perpendicular to the axis of the second connecting shaft; One end of the connecting component is rotatably connected to the end of the second connecting shaft away from the housing via a second rotating shaft, the axis of which is perpendicular to the axis of the second connecting shaft. The other end of the connecting component is rotatably connected to the support frame via a third rotating shaft, the axis of which is perpendicular to the axis of the second connecting shaft.

5. The roller-type needle holder according to claim 2, characterized in that, The protective sleeve is provided with a radial limiting member inside. The radial limiting member has a first radial limiting hole and a second radial limiting hole arranged in parallel with the axis. The first connecting shaft passes through the first radial limiting hole and the second connecting shaft passes through the second radial limiting hole.

6. The roller-type needle holder according to claim 1, characterized in that, The axial drive assembly includes an operating handle and a transmission unit. The operating handle is rotatably connected to the housing, with the drive end of the operating handle extending into the housing and the gripping end of the operating handle extending out of the housing. The transmission unit is disposed within the housing and is drive-connected to the drive end of the operating handle. The transmission unit is drive-connected to the second connecting shaft.

7. The roller-type needle holder according to claim 6, characterized in that, The transmission unit includes a transmission rod and an adapter rod. The transmission rod is disposed in the housing, parallel to the second connecting shaft, and is axially movable. One end of the transmission rod is movably connected to the drive end of the operating handle. The adapter rod is rotatably disposed in the housing, with one end movably connected to the other end of the transmission rod and the other end movably connected to the second connecting shaft.

8. The roller-type needle holder according to claim 7, characterized in that, The driving end of the operating handle is provided with a first strip-shaped hole extending along the length direction of the operating handle, and one end of the transmission rod is provided with a first guide rod passing through the first strip-shaped hole; one end of the adapter rod is provided with a second strip-shaped hole extending along the axial direction of the adapter rod, and the other end of the transmission rod is provided with a second guide rod passing through the second strip-shaped hole; the other end of the adapter rod is provided with a third strip-shaped hole extending along the axial direction of the adapter rod, and the end of the second connecting shaft away from the second roller clamp is provided with a third guide rod passing through the third strip-shaped hole.

9. The roller-type needle holder according to claim 6, characterized in that, The rotation drive source is an electric motor.

10. The roller-type needle holder according to claim 1, characterized in that, The sidewall of the first roller clamp is provided with a plurality of first annular grooves spaced apart along its axial direction; the sidewall of the second roller clamp is provided with a plurality of second annular grooves spaced apart along its axial direction; the plurality of first annular grooves and the plurality of second annular grooves are arranged in a one-to-one correspondence when the first roller clamp and the second roller clamp are closed.

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