A clamping and cutting mechanism for barbed suture barb cutting

Abstract

The utility model relates to barbed suture production and processing technical field discloses a kind of clamping shearing mechanism for barbed suture barb cutting, including base, the top of the base is fixedly connected with two support rods, and the top of one of the support rods is equipped with line feeding shearing mechanism, the top of the base is fixedly connected with positioning mechanism, the line feeding shearing mechanism includes motor, the bottom of the motor is installed in the top of the support rod, the drive end of the motor is fixedly connected with rotating rod, the outside of the rotating rod is fixedly connected with line feeding ring, the top of the line feeding ring is fixedly connected with two fixed rods one, the outside of two fixed rods one is rotatably connected with sliding block, the outside of the sliding block is slidably connected with auxiliary assembly. In the utility model, line feeding ring is rotated by motor drive to complete line feeding, and fixed-length shearing of suture is realized, and the coordination of line feeding and shearing is realized.

Description

Technical Field

[0001] This utility model relates to the field of barbed suture production and processing technology, and in particular to a clamping and shearing mechanism for cutting barbs in barbed sutures. Background Technology

[0002] The clamping and shearing mechanism for cutting barbed sutures is a specialized device that integrates clamping and shearing functions. During the manufacturing process, it clamps the suture filaments and uses a cutting tool to precisely cut unidirectional barbed structures with specific shapes, angles, and depths on its surface. By ensuring the stability of the clamping and the consistency of the cutting, it directly determines the forming quality, uniformity of distribution, and sharpness of the barbs, thereby ensuring that the suture can achieve reliable tissue gripping and knot-free function during surgery. It is a key piece of equipment for improving the performance of barbed suture products and the level of automated production.

[0003] The clamping and shearing mechanism uses clamping components to stably clamp the suture filaments, and is equipped with a linear feed component to ensure that the filaments can be indexed during cutting. Its shearing part consists of blades. The cutting unit can cut the rotating filaments with constant pressure, predetermined depth and angle through the platform, thereby processing a uniform and consistent unidirectional barb structure on the suture surface. The entire mechanism is usually guided to achieve closed-loop control to ensure the accuracy and repeatability of clamping and shearing.

[0004] In existing technologies, the clamping and shearing mechanisms used for cutting barbed sutures are usually independent of each other in terms of suture cutting and conveying, lacking coordination. The clamping and conveying unit is only responsible for moving the suture to a general position, while the shearing unit performs cutting at a fixed position. This disconnect leads to difficulties in achieving and maintaining an ideal stable state at the moment of cutting during high-speed or precision production processes due to secondary positioning errors after conveying, deformation or vibration caused by its own flexibility. This results in deviations in the cutting depth, angle and spacing of the barbs, and may even damage the suture. Therefore, a clamping and shearing mechanism for cutting barbed sutures is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a clamping and shearing mechanism for cutting barbs in barbed sutures, aiming to solve the problem that the clamping and shearing mechanisms in the prior art are usually independent and lack coordination in the cutting and conveying of sutures.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A clamping and cutting mechanism for cutting barbs in barbed sutures includes a base, two support rods fixedly connected to the top of the base, a suture feeding and cutting mechanism mounted on the top of one of the support rods, and a positioning mechanism fixedly connected to the top of the base.

[0008] The wire feeding and cutting mechanism includes a motor, the bottom end of which is mounted on the top end of the support rod. A rotating rod is fixedly connected to the drive end of the motor. A wire feeding ring is fixedly connected to the outer side of the rotating rod. Two fixed rods are fixedly connected to the top end of the wire feeding ring. A sliding block is rotatably connected to the outer side of each of the two fixed rods. A cutter is fixedly connected to the outer side of each sliding block. Two fixed plates are fixedly connected to the outer side of the wire feeding ring. A limit rod is fixedly connected inside each of the two fixed plates. A spring is sleeved on the outer side of each limit rod. An auxiliary component is slidably connected to the outer side of each sliding block.

[0009] As a further description of the above technical solution:

[0010] The positioning mechanism includes a housing, inside which a cylinder is installed. A main rod is fixedly connected to the drive end of the cylinder. Two triangular blocks are fixedly connected to the outer side of the main rod. An auxiliary connecting rod is slidably connected to the top of each of the two triangular blocks. A rotating rod is rotatably connected inside each of the auxiliary connecting rods. Two limiting blocks are fixedly connected inside the housing.

[0011] As a further description of the above technical solution:

[0012] The auxiliary component includes a fixing ring, the outer side of which is slidably connected to the outer side of the sliding block, and a fixing rod two is fixedly connected inside the fixing ring, with a fixing block fixedly connected to the bottom end of the fixing rod two.

[0013] As a further description of the above technical solution:

[0014] The top end of the wire feeding ring is slidably connected to the bottom end of the sliding block, and the inside of the sliding block is slidably connected to the outside of the limiting rod;

[0015] As a further description of the above technical solution:

[0016] The top end of the support rod is fixedly connected to the bottom end of the fixed block, and the inside of the fixed block is rotatably connected to the outside of the rotating rod.

[0017] As a further description of the above technical solution:

[0018] The inner side of the outer shell is fixedly connected to two limiting blocks 2, and the inner side of each limiting block 2 is slidably connected to the outer side of the main rod.

[0019] As a further description of the above technical solution:

[0020] The bottom end of the triangular block is slidably connected to the top end of the limiting block one, and the inner side of the limiting block one is slidably connected to the outer side of the main rod.

[0021] As a further description of the above technical solution:

[0022] The outer side of the main rod is slidably connected to the inner wall of the housing, and the inner side of the housing is rotatably connected to the outer side of the auxiliary connecting rod.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the wire feeding ring is driven by a motor to rotate and complete the wire feeding. At the same time, the sliding block is driven by a rotating rod to make a circular motion. When the sliding block moves to the position of the fixed ring, the blocking of the fixed ring forces the sliding block to slide inward, pushing the two blocks to make a scissor-like closing motion around the fixed rod as the axis, so as to realize the fixed length cutting of the suture. After the cutting is completed, the spring pushes the limit rod to make the sliding block automatically reset, realizing the coordination and unity of wire feeding and cutting.

[0025] 2. In this utility model, the main rod is pushed up by the cylinder, which drives the triangular blocks on both sides to move up synchronously. The inclined surface of the triangular block pushes the auxiliary connecting rod to rotate around the rotating rod, so that the end of the auxiliary connecting rod retracts towards the center and forms a three-point clamp with the main rod. This structure converts the inclined surface movement into the rotational movement of the connecting rod, realizing three-way synchronous positioning, effectively preventing the deviation during the processing of the sewing thread and ensuring the processing accuracy. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a clamping and shearing mechanism for cutting barbs in barbed sutures according to the present invention.

[0027] Figure 2 This is a schematic diagram of the feeding ring of a clamping and shearing mechanism for cutting barbs in barbed sutures, as proposed in this utility model.

[0028] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0030] Legend:

[0031] 1. Base; 2. Support rod; 3. Wire feeding and cutting mechanism; 301. Motor; 302. Rotating rod; 303. Wire feeding ring; 304. Fixed rod one; 305. Sliding block; 306. Cutter; 307. Fixing plate; 308. Limiting rod; 309. Auxiliary components; 3091. Fixing block; 3092. Fixing rod two; 3093. Fixing ring; 310. Spring; 4. Positioning mechanism; 41. Housing; 42. Cylinder; 43. Main rod; 44. Triangular block; 45. Rotating rod; 46. Auxiliary connecting rod; 47. Limiting block one; 48. Limiting block two. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figures 1 to 3 This utility model provides an embodiment of a clamping and shearing mechanism for cutting barbed sutures, including a base 1. The base 1 provides a stable mounting foundation for the entire mechanism, ensuring that it will not shake or shift during high-speed operation, thus improving the overall working stability of the mechanism. Two support rods 2 are fixedly connected to the top of the base 1. The two support rods 2 are symmetrically distributed to evenly distribute the weight of the upper mechanism, ensuring the balance and reliability of the support. A thread feeding and shearing mechanism 3 is installed at the top of one of the support rods 2. This mechanism integrates thread feeding and shearing functions, enabling continuous feeding and precise cutting of sutures in one integrated operation, thus improving processing efficiency. A positioning mechanism 4 is fixedly connected to the top of the base 1. This mechanism can accurately position the sutures, effectively preventing the sutures from shifting during processing and ensuring cutting accuracy.

[0034] The thread feeding and cutting mechanism 3 includes a motor 301, which serves as a power source and provides a stable and adjustable speed to ensure the coordination and consistency of the thread feeding and cutting actions. The bottom end of the motor 301 is mounted on the top end of the support rod 2. The drive end of the motor 301 is fixedly connected to a rotating rod 302. The rotating rod 302 can efficiently transmit the rotational power of the motor 301 to subsequent components, ensuring the stability of power transmission. A thread feeding ring 303 is fixedly connected to the outside of the rotating rod 302. During rotation, the thread feeding ring 303 can smoothly push the suture thread, allowing the suture thread to move according to a preset speed and path, ensuring uniform thread feeding. Two fixed rods 304 are fixedly connected to the top end of the thread feeding ring 303. Sliding blocks 305 are rotatably connected to the outside of each of the two fixed rods 304. The two fixed rods 304 provide stable rotation fulcrums for the sliding blocks 305, ensuring the flexibility and accuracy of the sliding blocks 305 during rotation.

[0035] A cutter 306 is fixedly connected to the outer side of the sliding block 305. The sliding block 305 can rotate flexibly around the fixed rod 304, providing the necessary movement trajectory for the cutting action of the cutter 306. The cutter 306 adopts a sharp blade design, which can quickly and accurately cut the suture under the drive of the sliding block 305, ensuring a flat cut. Two fixed plates 307 are fixedly connected to the outer side of the thread feed ring 303. A limit rod 308 is fixedly connected inside the two fixed plates 307. The fixed plates 307 provide a solid installation base for the limit rod 308, ensuring that the limit rod 308 will not be displaced during operation.

[0036] The limiting rod 308 can effectively limit the sliding range of the sliding block 305, preventing the sliding block 305 from affecting the shearing effect due to excessive sliding. A spring 310 is sleeved on the outside of the limiting rod 308. The spring 310 has good elastic restoring ability. After the sliding block 305 completes the shearing action, it can quickly return to the initial position to prepare for the next shearing. An auxiliary component 309 is slidably connected to the outside of the sliding block 305. The auxiliary component 309 can guide the sliding block 305 to slide and rotate in a standardized manner, ensuring the stability and accuracy of the shearing action.

[0037] The auxiliary component 309 includes a fixing ring 3093, which can precisely contact the sliding block 305. The contact force causes the sliding block 305 to slide inward, providing a trigger condition for the shearing action. The outer side of the fixing ring 3093 is slidably connected to the outer side of the sliding block 305. The inner side of the fixing ring 3093 is fixedly connected to a fixing rod 3092. The bottom end of the fixing rod 3092 is fixedly connected to a fixing block 3091. The fixing rod 3092 firmly connects the fixing ring 3093 and the fixing block 3091, ensuring the stability of the position of the fixing ring 3093. The fixing block 3091 provides a stable installation support for the auxiliary component 309, ensuring that the auxiliary component 309 will not shake during operation.

[0038] The top end of the wire feed ring 303 is slidably connected to the bottom end of the sliding block 305. The inside of the sliding block 305 is slidably connected to the outside of the limiting rod 308, so that the sliding block 305 slides in a directional manner under the constraint of the limiting rod 308, ensuring the accuracy of the sliding trajectory. The top end of the support rod 2 is fixedly connected to the bottom end of the fixing block 3091, further enhancing the installation stability of the fixing block 3091 and ensuring the reliable operation of the auxiliary component 309. The inside of the fixing block 3091 is rotatably connected to the outside of the rotating rod 302, so that the rotating rod 302 can rotate smoothly within the fixing block 3091, reducing rotational resistance.

[0039] Reference Figure 2 and Figure 4The positioning mechanism 4 includes a housing 41, which provides a closed installation space for the internal components of the positioning mechanism 4, effectively protecting the internal components from external interference and enhancing the overall rigidity of the mechanism. A cylinder 42 is installed inside the housing 41. The cylinder 42 serves as the power source of the positioning mechanism 4, providing stable thrust to ensure the strength and stability of the positioning action. A main rod 43 is fixedly connected to the drive end of the cylinder 42. Two triangular blocks 44 are fixedly connected to the outside of the main rod 43. The main rod 43 can transmit the thrust of the cylinder 42 to the triangular blocks 44, causing the triangular blocks 44 to move up and down. The tops of the two triangular blocks 44 are slidably connected to auxiliary connecting rods 46. During the upward movement of the triangular blocks 44, they can apply precise force to the auxiliary connecting rods 46, providing power for the rotation of the auxiliary connecting rods 46. Rotating rods 45 are rotatably connected inside the auxiliary connecting rods 46. Under the action of the triangular blocks 44, the auxiliary connecting rods 46 can rotate around the rotating rods 45, thereby achieving the clamping and positioning of the suture.

[0040] Rotating rod 45 provides a stable rotation fulcrum for auxiliary connecting rod 46, ensuring the flexibility and accuracy of auxiliary connecting rod 46 during rotation. Two limiting blocks 47 are fixedly connected inside the outer shell 41. Limiting blocks 47 can limit and guide the sliding of triangular block 44, ensuring that triangular block 44 moves on a preset trajectory. Two limiting blocks 48 are fixedly connected inside the outer shell 41. Limiting blocks 48 can limit and guide the movement of main rod 43, preventing main rod 43 from deviating during movement.

[0041] The inner sides of the two limiting blocks 48 are slidably connected to the outer sides of the main rod 43, allowing the main rod 43 to move smoothly up and down under the constraint of the limiting blocks 48. The bottom end of the triangular block 44 is slidably connected to the top end of the limiting block 47, ensuring the smooth sliding of the triangular block 44 on the limiting block 47. The inner side of the limiting block 47 is slidably connected to the outer side of the main rod 43, further enhancing the stability of the main rod 43's movement. The outer side of the main rod 43 is slidably connected to the inner wall of the outer shell 41, making the movement of the main rod 43 within the outer shell 41 more stable and reliable. The inner side of the outer shell 41 is rotatably connected to the outer side of the auxiliary link 46, providing additional support for the rotation of the auxiliary link 46 and ensuring the stability of the auxiliary link 46's rotation.

[0042] Working principle: The motor 301 drives the rotating rod 302 to rotate, which in turn drives the thread feeding ring 303 on the outside of the rotating rod 302 to rotate synchronously. At the same time, the sliding block 305 located on one side of it rotates together. Whenever the sliding block 305 rotates to the fixed ring 3093, the outer side of the sliding block 305 will contact the fixed ring 3093 and slide inward, rotating inward with the fixed rod 304 as the axis. With the cooperation of the two sliding blocks 305, the suture is cut once. Since the inside of the thread feeding ring 303 has a groove for placing the suture, it will push the thread forward during its forward rotation. Finally, each cut ensures the consistency of length. After one cut, due to the inward sliding action of the two sliding blocks 305, the spring 310 sleeved on the outside of the internal limiting rod 308 will restore them to their initial state, ensuring the integrity of the next cut.

[0043] To ensure that the barbed suture does not deviate from its direction during processing and thus maintains accuracy, positioning mechanisms 4 are installed at its starting and ending positions for positioning and clamping. The main rod 43 is driven upward by a cylinder 42, and the triangular blocks 44 on both sides of the main rod 43 move upward synchronously. Since a rotating rod 45 is fixed inside the outer shell 41, it will contact the auxiliary connecting rod 46 and apply force to it during the upward movement of the triangular blocks 44. At this time, the auxiliary connecting rod 46 will rotate around the rotating rod 45 as its axis, cooperating with the original main rod 43 to achieve three-way positioning and clamping operation, thereby ensuring processing accuracy and stability.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A clamping and cutting mechanism for barbed suture barb cutting, comprising a base (1), characterized in that: The top of the base (1) is fixedly connected to two support rods (2), one of which is equipped with a wire feeding and cutting mechanism (3), and the top of the base (1) is fixedly connected to a positioning mechanism (4). The wire feeding and cutting mechanism (3) includes a motor (301), the bottom end of which is mounted on the top end of the support rod (2). A rotating rod (302) is fixedly connected to the driving end of the motor (301). A wire feeding ring (303) is fixedly connected to the outer side of the rotating rod (302). Two fixed rods (304) are fixedly connected to the top end of the wire feeding ring (303). A sliding block (305) is rotatably connected to the outer side of each of the two fixed rods (304). A cutter (306) is fixedly connected to the outer side of the sliding block (305). Two fixed plates (307) are fixedly connected to the outer side of the wire feeding ring (303). A limit rod (308) is fixedly connected inside each of the two fixed plates (307). A spring (310) is sleeved on the outer side of the limit rod (308). An auxiliary component (309) is slidably connected to the outer side of the sliding block (305).

2. The clamping and shearing mechanism for cutting barbs in barbed sutures according to claim 1, characterized in that: The positioning mechanism (4) includes a housing (41), inside which a cylinder (42) is installed. The driving end of the cylinder (42) is fixedly connected to a main rod (43). Two triangular blocks (44) are fixedly connected to the outside of the main rod (43). The top of each of the two triangular blocks (44) is slidably connected to an auxiliary connecting rod (46). The inside of each auxiliary connecting rod (46) is rotatably connected to a rotating rod (45). Inside the housing (41) are two limiting blocks (47).

3. The clamping and shearing mechanism for cutting barbs in barbed sutures according to claim 1, characterized in that: The auxiliary component (309) includes a fixing ring (3093), the outer side of which is slidably connected to the outer side of the sliding block (305), and a fixing rod (3092) is fixedly connected inside the fixing ring (3093), and a fixing block (3091) is fixedly connected to the bottom end of the fixing rod (3092).

4. The clamping and shearing mechanism for cutting barbs in barbed sutures according to claim 1, characterized in that: The top end of the wire feed ring (303) is slidably connected to the bottom end of the sliding block (305), and the inside of the sliding block (305) is slidably connected to the outside of the limiting rod (308).

5. A clamping and shearing mechanism for cutting barbs in barbed sutures according to claim 3, characterized in that: The top end of the support rod (2) is fixedly connected to the bottom end of the fixing block (3091), and the inside of the fixing block (3091) is rotatably connected to the outside of the rotating rod (302).

6. The clamping and shearing mechanism for cutting barbs in barbed sutures according to claim 2, characterized in that: The inner side of the outer shell (41) is fixedly connected to two limiting blocks (48), and the inner sides of the two limiting blocks (48) are slidably connected to the outer side of the main rod (43).

7. A clamping and shearing mechanism for cutting barbs in barbed sutures according to claim 2, characterized in that: The bottom end of the triangular block (44) is slidably connected to the top end of the limiting block (47), and the inner side of the limiting block (47) is slidably connected to the outer side of the main rod (43).

8. A clamping and shearing mechanism for cutting barbs in barbed sutures according to claim 2, characterized in that: The outer side of the main rod (43) is slidably connected to the inner wall of the outer shell (41), and the inner side of the outer shell (41) is rotatably connected to the outer side of the auxiliary connecting rod (46).

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