Trimming device for medical lead
By subjecting the wires to high-temperature heating before cutting, the problem of loose wire entanglement is solved, ensuring that the wires break and fuse simultaneously during cutting, improving the smoothness and safety of the wires, and reducing the risk of jamming and bleeding.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHAOXING DUSHI CHENGFA MEDICAL TECHNOLOGY CO LTD
- Filing Date
- 2026-03-18
- Publication Date
- 2026-04-17
AI Technical Summary
In existing technologies, when cutting medical wires, the guide wires may become loose or tangled, leading to the risk of obstruction or bleeding in the sheath or body cavity.
Before the cutting action, the wire is heated to a high temperature by the heating component, causing the wound metal wire to undergo local high temperature softening and micro-melting at the predetermined cutting point, which destroys the internal stress. Then, the cutting component breaks and fuses and solidifies simultaneously.
It improves the smoothness of the wires, avoids the risk of jamming and scratches, and enhances the safety and yield of medical devices.
Smart Images
Figure CN121869975A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of medical device technology, and in particular to a wire cutting device for medical leads. Background Technology
[0002] Medical leads are widely used components. Medical leads consist of the lead wire and a guide wire evenly wound around it. They are typically made of common metals such as nickel-titanium, stainless steel, and cobalt-chromium. After precision processing, they are used in medical devices. In endoscopic treatment, the lead wire enters the target cavity and maintains its position within the cavity, assisting in the exchange of various instruments. It has become an indispensable part of modern digestive endoscopy diagnosis and treatment. The overall smoothness and straightness of the lead wire directly affect its patency within the sheath and cavity. With traditional cutting equipment, the guide wire wound around the lead wire is prone to tangling during cutting, causing the lead wire to become stuck or even bleed after entering the sheath or blood vessel. Summary of the Invention
[0003] The main objective of this invention is to provide a wire cutting device for medical wires, which aims to solve the technical problems of loose and tangled guide wires during the cutting of medical wires in the prior art.
[0004] To achieve the above objectives, the present invention provides a wire-cutting device for medical leads, comprising:
[0005] A cutting assembly configured to cut a medical lead to be processed, the cutting assembly having a lead inlet; and, A heating component is disposed at the front end of the inlet, and the heating component is configured to heat a preset cutting position of the medical wire to be processed.
[0006] In one embodiment, the heating assembly includes a spray gun connected to a combustible gas cylinder, the spray gun being disposed at the front end of the inlet, and the nozzle of the spray gun facing the medical wire to be processed.
[0007] In one embodiment, the heating component is connected to a first control module, which is configured to drive the heating of a preset cutting position by flame when the travel of the medical lead is detected to reach a preset value.
[0008] In one embodiment, the wire cutting device for the medical wire further includes a support plate, the cutting assembly is fixedly connected to one side of the support plate, and the spray gun is connected to the other side of the support plate.
[0009] In one embodiment, the heating temperature of the spray gun is 1200℃~1400℃.
[0010] In one embodiment, the medical lead cutting device further includes: A guide assembly is disposed between the output end of the heating assembly and the inlet; the guide assembly is configured to drive the medical lead to be processed through the heating assembly and through the cutting assembly.
[0011] In one embodiment, the guide assembly includes two extrusion rollers arranged side by side for clamping the medical wire to be processed.
[0012] In one embodiment, the extrusion wheel is elastic.
[0013] In one embodiment, the cutting assembly includes a cutting box, the cutting box having a first guide groove along the extension direction of the medical wire, and a cutting tool slidably disposed within the cutting box.
[0014] In one embodiment, the cutting assembly further includes a cam and a support plate; the cam abuts against the support plate, and the blade is connected to the side of the support plate away from the cam; the cam rotates and drives the blade to slide through the support plate to cut the medical wire.
[0015] The technical solution of this invention introduces a heating process before the cutting action, using high temperature to cause localized high-temperature softening and micro-melting of the fine metal guide wire wrapped around the outside of the medical lead at the predetermined cutting point. This pre-heat treatment effectively breaks down the internal stress of the metal guide wire, allowing the outer guide wire to break synchronously with the inner lead wire during the subsequent mechanical cutting by the cutting assembly 2, with the cut edge undergoing fusion and solidification. This structure fundamentally solves the problems of guide wire loosening, fraying, or strand detachment that are easily caused by traditional cold cutting, significantly improving the overall smoothness of the wire and avoiding the risk of jamming or even scratching and bleeding caused by burrs at the wire end when the medical lead enters the endoscope sheath or human cavity, thus improving the safety of medical devices and the yield rate of processed products. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0017] Figure 1 A schematic diagram of an embodiment of the medical wire cutting device provided by the present invention; Figure 2 A schematic diagram of the cutting component of the medical wire cutting device provided by the present invention; Figure 3A schematic diagram of the guiding assembly of the wire cutting device for medical leads provided by the present invention; Explanation of icon numbers: 1. Guide assembly; 11. First motor; 12. Transmission structure; 13. Rotating shaft; 14. Extrusion roller; 15. Support plate; 2. Cutting assembly; 21. Second motor; 22. Cam; 23. Cutting box; 231. First guide groove; 232. Cutting tool; 233. Support plate; 3. Heating components; 31. Spray gun.
[0018] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0020] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0021] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.
[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
[0023] This invention proposes a wire-cutting device for medical leads.
[0024] Please see Figures 1-3 In one embodiment of the present invention, the wire-cutting device for the medical lead includes: Cutting component 2; the cutting component 2 is configured to cut medical leads to be processed, the cutting component having a wire inlet; and, Heating component 3 is disposed at the front end of the wire inlet of the cutting component, and the heating component is configured to heat the preset cutting position of the medical wire to be processed.
[0025] Specifically, in the actual production process, the medical leads are fed by the preceding wire supply equipment. Before entering the inlet of the cutting assembly 2, the medical leads to be processed first pass through the working area of the heating assembly 3. Before the medical leads are conveyed to the preset cutting position, the heating assembly 3 is activated to perform instantaneous high-temperature heating treatment on the local cutting area. Subsequently, the heated medical leads continue to move forward into the inlet of the cutting assembly 2, where the cutting assembly 2 performs the cutting action.
[0026] The technical solution provided in this embodiment introduces a heating process before the cutting action, using high temperature to cause localized high-temperature softening and micro-melting of the fine metal guide wire wrapped around the outside of the medical lead at the predetermined cutting point. This pre-heat treatment effectively breaks down the internal stress of the metal guide wire, allowing the outer guide wire to break synchronously with the inner lead wire during the subsequent mechanical cutting by the cutting assembly 2, with the cut edge undergoing fusion and solidification. This structure fundamentally solves the problems of guide wire loosening, fraying, or strand detachment that are easily caused by traditional cold cutting, significantly improving the overall smoothness of the wire and avoiding the risk of jamming or even scratching and bleeding caused by burrs at the wire end when the medical lead enters the endoscope sheath or human cavity, thus improving the safety of medical devices and the yield rate of processed products.
[0027] Please see Figure 2 In another embodiment of the present invention, the heating component 3 includes a spray gun 31, the spray gun 31 is connected to a combustible gas cylinder, the spray gun 31 is disposed at the front end of the inlet of the cutting component 2, the nozzle of the spray gun 31 faces the medical wire to be processed, and the nozzle of the spray gun 31 is disposed close to the medical wire to be processed.
[0028] Specifically, an open-flame torch 31 is used as the heating source, with a high-temperature flame generated by the combustion of combustible gases such as butane or propane directly acting on the wire. Positioning the torch nozzle close to the conductor ensures a high concentration of heat energy. This close-range open-flame heating method has a much higher heat conduction efficiency than resistance wire radiation heating, enabling the metal wire to reach its annealing or near-melting point in a very short time. This ensures the reliability of wire end melting and prevents excessive heat conduction along the conductor, which could lead to thermodynamic degradation in non-cut areas, thus ensuring the stability of the conductor's overall physical properties. Furthermore, to prevent the open flame from shifting due to airflow in complex environments, a ceramic heat shield can be installed at the output end of the torch 31 to concentrate heat and prevent wind damage, further increasing the energy density of localized heating.
[0029] In an embodiment of the present invention, the heating component 3 is connected to a first control module, which is configured to drive the heating of a preset cutting position by spraying fire when the travel of the medical lead reaches a preset value.
[0030] Specifically, the first control module can be a PLC or microcontroller and receives the signal of the wire supply length from the preceding wire supply device. When the wire delivery length is detected to have reached the required cutting length, i.e., the preset value, the first control module immediately sends an electrical signal to trigger the solenoid valve or ignition device of the spray gun 31, achieving precise intermittent flame heating. The first control module achieves precise timing linkage between the heat treatment action and the wire displacement, ensuring that the heating point coincides with the cutting point each time, while the intermittent flame heating saves gas energy consumption.
[0031] Please see Figures 1 to 3 In an embodiment of the present invention, the medical wire cutting device further includes a support plate 15, a cutting assembly 2 fixedly connected to one side of the support plate 15, and a spray gun 31 connected to the other side of the support plate 15.
[0032] Specifically, the support plate 15 is a vertically arranged plate. One end of the support plate 15 is fixedly connected to the spray gun 31 by welding, and the other end of the support plate 15 is fixedly connected to a support beam. The support beam is arranged perpendicular to the support plate 15 and is located on the same side as the spray gun 31. The shearing assembly 2 is mounted on the support beam. By distributing the shearing assembly 2 and the spray gun 31 on opposite sides of the support plate 15, the distance between the two workstations can be fixed and locked during assembly, ensuring a constant distance between the heat treatment point and the shearing point and preventing workstation displacement caused by equipment vibration during processing.
[0033] In a preferred embodiment of the present invention, the heating temperature of the spray gun 31 is set to 1200°C to 1400°C.
[0034] Specifically, the temperature range of 1200℃ to 1400℃ is the melting and solidification temperature range set for medical lead materials such as nickel-titanium alloy and medical stainless steel. If the temperature is too low, the high-melting-point alloy lead wire cannot produce sufficient fusion deformation, resulting in poor anti-stretching effect; if the temperature is too high, it is easy to cause the internal core wire of the lead wire to melt or oxidize and turn black, affecting the biocompatibility and strength of the product.
[0035] Please see Figure 1 and Figure 3 In an embodiment of the present invention, the medical wire cutting device further includes a guide component 1, which is disposed between the output end of the heating component 3 and the input end of the cutting component 2; the guide component 1 is configured to drive the medical wire to be processed through the heating component 3 and through the cutting component 2.
[0036] Specifically, the guide component 1 is positioned between the heating station and the cutting station. On one hand, it provides vertical straightness guidance for the free-flowing soft wire, preventing the wire from shifting or bending in the feeding area; on the other hand, it pulls the wire at a uniform speed or in a step-by-step manner through the flame zone of the spray gun into the cutting box, ensuring stable wire tension and avoiding uneven or slanted cuts caused by wire retraction or slack.
[0037] Please see Figure 1 In an embodiment of the present invention, the guide assembly includes two extrusion rollers 14, which are arranged side by side for clamping the medical wire to be processed.
[0038] Specifically, the guide assembly 1 includes two extrusion rollers 14 configured to clamp the medical lead to be processed. The two extrusion rollers 14 are positioned between the heating assembly 3 and the cutting assembly 2, abutting against each other and rotating in opposite directions. The opposing rubber-coated rollers 14 generate a frictional gripping force on the lead in the tangential direction through elastic deformation, smoothly feeding the lead forward. Because the surface of medical leads is extremely smooth and cannot be damaged, the elastic extrusion rollers, such as those made of polyurethane or silicone, can provide sufficient frictional traction while buffering and protecting the extremely fine outer guide wire, avoiding wire indentation, flattening, or coating peeling that may be caused by rigid clamping. Simultaneously, the mutually extruding structure can adapt to minute tolerance changes in wire diameter, ensuring that the wire feed does not slip. The reverse rotation design further counteracts the lead's spin tendency during traction, ensuring stable axial posture and high cross-sectional perpendicularity, laying the foundation for subsequent precise cutting. Preferably, the surface of the extrusion roller 14 is sanded or has micron-level anti-slip texture, which increases the static friction coefficient without damaging the smoothness of the wire surface, ensuring zero drift in stroke accuracy during high-frequency reciprocating wire feeding.
[0039] A rotating shaft 13 is fixedly connected to the center of the extrusion roller 14; at least one of the rotating shafts 13 is rotatably connected to a transmission structure 12; the transmission structure 12 is configured to drive the rotating shaft 13 to rotate.
[0040] Specifically, the support plate 15, on the side where the cutting component 2 is located, also has a parallel support plate. Two rotating shafts 13 are parallel and horizontally arranged, with both ends of each shaft 13 rotatably positioned between the support plate 15 and the support plate. The transmission structure 12 also includes two synchronous pulleys and a first motor. The first motor is located at the lower end of the support plate, and the support plate is located at the output end of the first motor and fixedly connected to one of the synchronous pulleys. One rotating shaft is fixedly connected to the other synchronous pulley. Flexible transmission components are fitted around the two synchronous pulleys. The synchronous pulleys can be either sprockets or pulleys, and the flexible transmission components can be chains or belts that match the synchronous pulleys.
[0041] In an embodiment of the present invention, the cutting assembly 2 includes a cutting box 23, the cutting box 23 having a first guide groove 231 along the extension direction of the medical wire, and a blade 232 being slidably disposed inside the cutting box 23.
[0042] Specifically, the cutting box 23 also has a second guide groove for the blade 232 to pass through. The first guide groove 231 is used for the medical wire to pass through. The first guide groove 231 is perpendicular to the second guide groove. The first guide groove 231 is a through groove, and the second guide groove is a blind groove. The second guide groove provides guidance for the translational cutting action of the blade 232. The blade 232 is confined within the second guide groove, completely eliminating lateral wobble or jitter of the blade during movement, ensuring that the blade edge always cuts into the medical wire in an absolutely perpendicular posture. This design greatly ensures the flatness of the cut surface, prevents wire splitting, burrs, or slight bending caused by uneven cutting force, and makes each wire section have a mirror-like smoothness and geometric precision.
[0043] In an embodiment of the present invention, the cutting assembly 2 further includes a cam 22 and a support plate 233; one side of the cam 22 abuts against the support plate 233, and the side of the support plate 233 away from the cam 22 is connected to the cutter 232. The cam rotates and drives the cutter to slide through the support plate to cut the medical wire.
[0044] Specifically, a support rod is provided between the support plate 233 and the cutter 232, and the support rod and the cutter 232 reciprocate within the first guide groove 231; a spring is sleeved on the support rod. The second motor 21 drives the cam 22 to rotate. As the radius of the cam 22 increases, the edge of the cam pushes the support plate 233, causing the support rod and the cutter 232 to overcome the elastic force of the spring and move towards the medical wire, performing an instantaneous cutting action. When the high point of the cam 22 passes and enters the low point contour area, the elastic restoring force of the spring is released instantaneously, pushing the support plate 233 upward, causing the cutter 232 to quickly return to its original position, waiting for the next cycle.
[0045] A right-angle support plate is fixedly connected to one side of the support beam. The cutting box 23 is fixedly connected to the top of the horizontal part of the right-angle support plate, and the second motor 21 is fixedly connected to the side of the vertical part of the right-angle support plate. The rotational motion of the second motor 21 is directly converted into the linear reciprocating motion of the cutter 232 using a cam 22. This design is compact, has a fast response speed, and is ideal for large-scale continuous wire cutting operations. The cam 22 curve can be specially designed according to the mechanical characteristics required for cutting the wire, such as a quick-return characteristic, resulting in strong explosive force when the blade descends and rapid return. Simultaneously, the surface of the cam 22 can be coated with an anti-friction coating, such as a diamond-like carbon (DLC) coating, to reduce dry friction loss between it and the support plate 233, ensuring consistent stroke during long-term high-frequency operation.
[0046] The spring mounted on the support rod not only provides reliable mechanical reset power, effectively avoiding the delay or air leakage that may occur during cylinder reset; at the same time, during the cutting process of the blade 232, the spring can also absorb some of the rigid impact force, reduce the wear and chipping of the blade caused by hard collision, extend the service life of the blade 232, and ensure the quietness and stability of the equipment during long-term operation.
[0047] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.
Claims
1. A wire-cutting device for medical leads, characterized in that, include: A cutting assembly (2) configured to cut medical wires to be processed, the cutting assembly (2) having a wire inlet; and, Heating component (3) is disposed at the front end of the inlet port and is configured to heat the preset cutting position of the medical wire to be processed.
2. The wire-cutting device for medical leads as described in claim 1, characterized in that, The heating component (3) includes a spray gun connected to a combustible gas cylinder. The spray gun is located at the front end of the inlet, and the nozzle of the spray gun faces the medical wire to be processed.
3. The wire-cutting device for medical leads as described in claim 2, characterized in that, The heating component (3) is connected to a first control module, which is configured to drive the heating of a preset cutting position by spraying fire when the travel of the medical wire reaches a preset value.
4. The wire-cutting device for medical leads as described in claim 2, characterized in that, The medical wire cutting device also includes a support plate (15), the cutting component (2) is fixedly connected to one side of the support plate (15), and the spray gun is connected to the other side of the support plate (15).
5. The wire-cutting device for medical leads as described in claim 2, characterized in that, The heating temperature of the spray gun is 1200℃~1400℃.
6. The wire-cutting device for medical leads as described in any one of claims 1 to 5, characterized in that, The wire-cutting device for the medical lead also includes: A guide component (1) is disposed between the output end of the heating component (3) and the inlet; the guide component (1) is configured to drive the medical wire to be processed through the heating component (3) and through the cutting component (2).
7. The wire-cutting device for medical leads as described in claim 6, characterized in that, The guide assembly (1) includes two extrusion rollers (14) arranged side by side for clamping the medical wire to be processed.
8. The wire-cutting device for medical leads as described in claim 7, characterized in that, The extrusion wheel (14) is elastic.
9. The wire-cutting device for medical leads as described in any one of claims 1 to 5, characterized in that, The cutting assembly (2) includes a cutting box (23), which has a first guide groove (231) along the extension direction of the medical wire, and a cutting tool (232) is slidably disposed inside the cutting box (23).
10. The wire-cutting device for medical leads as described in claim 9, characterized in that, The cutting assembly (2) further includes a cam (22) and a support plate (233); the cam (22) abuts against the support plate (233), and the blade (232) is connected to the side of the support plate (233) away from the cam (22); the cam (22) rotates and drives the blade (232) to slide through the support plate (233) to cut the medical wire.