Medical device guidewire stress relief device

Abstract

The utility model provides a kind of medical instrument guide wire stress relieving device, including vibration module and laser irradiation module, the vibration module includes air floatation support unit and exciter, the air floatation support unit is fixed in vibration transmission rod one end, the vibration transmission rod other end is fixed on exciter vibrator, the exciter vibration direction is perpendicular to guide wire axis, the laser irradiation module includes scanning head, laser and at least two air floatation support units, the two air floatation support units of laser irradiation module are fixed in support rod top and coaxial, the scanning head is arranged between two air floatation support units, the scanning head is electrically connected laser by flexible optical fiber, the laser emitted by the scanning head is perpendicular to guide wire length direction.The utility model applies transverse alternating stress and thermal stress to guide wire by vibration module and laser irradiation module respectively, and residual stress is eliminated by coupling.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a medical device guide wire stress relief device. Background Technology

[0002] Medical device guidewires are mostly made of ultra-fine steel wire or nickel-titanium alloy wire with a diameter of ≤0.2mm. After processing such as drawing, residual stress will be generated, which needs to be removed, otherwise it will increase the potential risks during surgery. Summary of the Invention

[0003] To address the above problems, this utility model provides a medical device guide wire stress relief device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a medical device guidewire stress relief device, comprising a vibration module and a laser irradiation module. The vibration module includes an air-bearing support unit and an exciter. The air-bearing support unit is fixed to one end of a vibration transmission rod, and the other end of the vibration transmission rod is fixed to the exciter's moving part. The vibration direction of the exciter is perpendicular to the guidewire axis. The laser irradiation module includes a scanning head, a laser, and at least two air-bearing support units. The two air-bearing support units of the laser irradiation module are fixed to the top of the support rod and are coaxial. The scanning head is disposed between the two air-bearing support units. The scanning head is electrically connected to the laser via a flexible optical fiber. The laser emitted by the scanning head is perpendicular to the length direction of the guidewire.

[0005] Preferably, the air-bearing support unit includes an inner core and an outer shell. The middle section of the inner core is a ring, and the two ends are horns. The ring is connected to the small-diameter end of the horn. The two ends of the outer shell are respectively connected to the large-diameter end of the horn on the same side. An annular cavity is provided between the inner core and the outer shell. The annular cavity is flush with the two ends of the ring. The two ends of the ring are provided with symmetrical annular gaps. At least one connecting rod is provided in the annular cavity. One end of the connecting rod is connected to the outer wall of the ring, and the other end is connected to the inner wall of the outer shell. The connecting rod is located between the annular gaps at both ends.

[0006] Preferably, the annular gap is coaxial with the circular ring, the width of the annular gap is 10-20μm, and the inner diameter of the circular ring is 0.20mm-0.35mm.

[0007] Preferably, an air inlet is provided in the middle of the side wall of the outer shell, an air inlet pipe extends into the air inlet, one end of the air inlet pipe is connected to an annular cavity, and the other end is connected to an air source, and the air inlet and the outer wall of the air inlet pipe are sealed together.

[0008] Preferably, the focal plane generated by the field lens inside the scanning head is perpendicular to the axis of the guide wire, and the guide wire is located at the center of the focal plane.

[0009] Preferably, the air-bearing support unit of the vibration module and the air-bearing support unit of the laser irradiation module are coaxial when the vibration is not activated.

[0010] Preferably, the distance between the vibration module and the laser irradiation module is 10-20cm, and the distance between the two air-bearing support units of the laser irradiation module is 10-20cm.

[0011] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention applies controllable periodic alternating stress to the guidewire through a vibration module, which, combined with residual stress, causes microscopic dislocations to undergo micro-plastic slip or rearrangement, thereby reducing or homogenizing macroscopic residual stress; a laser irradiation module provides non-contact, rapid, localized, and gentle heating to the moving guidewire, generating thermal stress through thermal expansion, further promoting dislocation reorganization, while thermal energy accelerates atomic diffusion, which helps stress relaxation; the coupling of low-frequency mechanical vibration and low-power laser precise heating produces a thermo-mechanical synergistic effect, where vibration lowers the energy barrier for atomic diffusion, and gentle thermal energy provides power for micro-atom diffusion, the combination of which improves the efficiency of residual stress elimination and can effectively act on the core of the material, avoiding the skin-core stress difference caused by traditional surface treatment; the air-bearing support unit greatly reduces the risk of surface scratches, making it suitable for ultra-fine guidewires with high surface requirements, and the air film provides uniform damping and centering force, making vibration transmission smooth and uniform. Attached Figure Description

[0012] Figure 1 This is a front view of the medical device guide wire stress relief device of this utility model.

[0013] Figure 2 This is a top sectional view of the air-bearing support unit of the medical device guide wire stress relief device of this utility model.

[0014] Figure descriptions: 1. Vibration module, 2. Laser irradiation module, 3. Air-bearing support unit, 31. Inner core, 32. Outer shell, 33. Annular cavity, 34. Connecting rod, 35. Annular gap, 36. Ring, 37. Horn, 38. Air inlet, 4. Exciter, 41. Vibration transmission rod, 5. Support rod, 6. Guide wire, 7. Scanning head, 8. Air source, 81. Air inlet pipe, 9. Laser, 91. Flexible optical fiber. Detailed Implementation

[0015] To provide a better understanding of the purpose, structure, features, and functions of this utility model, detailed descriptions are provided below with reference to specific embodiments.

[0016] Please refer to the reference. Figure 1 and Figure 2An embodiment of the present invention provides a medical device guidewire stress relief device, comprising a vibration module 1 and a laser irradiation module 2. The vibration module 1 includes an air-bearing support unit 3 and an exciter 4. The air-bearing support unit 3 is fixed to one end of a vibration transmission rod 41, and the other end of the vibration transmission rod 41 is fixed to the mover of the exciter 4. The vibration direction of the exciter 4 is perpendicular to the axis of the guidewire 6. The laser irradiation module 2 includes a scanning head 7, a laser 9, and at least two air-bearing support units 3. The two air-bearing support units 3 of the laser irradiation module 2 are fixed to the top of a support rod 5 and are coaxial. The scanning head 7 is disposed between the two air-bearing support units 3. The scanning head 7 is electrically connected to the laser 9 through a flexible optical fiber 91. The laser emitted by the scanning head 7 is perpendicular to the length direction of the guidewire 6.

[0017] This utility model does not innovate the scanning head 7, the exciter 4 and the laser 9. The scanning head 7 adopts the Golden Orange CZ series galvanometer + f=100mm field lens, the exciter 4 adopts the Dazhong Motor VC-10 + high-precision linear encoder + HANS-MC analog driver, and the laser 9 adopts Raycus laser RFL-C20-SM.

[0018] Controllable periodic alternating stress is applied to the guide wire 6 by the vibration module 1, which is superimposed on the residual stress to induce micro-plastic slip or rearrangement of micro-dislocations, thereby reducing or homogenizing the macroscopic residual stress. The moving guide wire 6 is heated in a non-contact, rapid, localized, and mild manner by the laser irradiation module 2. The thermal expansion effect generates thermal stress, which further promotes dislocation reorganization. At the same time, the thermal energy accelerates atomic diffusion, which helps to relax the stress. The coupling of low-frequency mechanical vibration and low-power laser precise heating produces a thermo-mechanical synergistic effect. Vibration lowers the energy barrier for atomic diffusion in the material, and mild thermal energy provides power for atomic micro-diffusion. The combination of the two improves the efficiency of residual stress elimination and can effectively act on the core of the material, avoiding the skin-core stress difference caused by traditional surface treatment.

[0019] In one embodiment, such as Figure 1 and Figure 2As shown, the air-float support unit 3 includes an inner core 31 and an outer shell 32. The middle section of the inner core 31 is a ring 36, and the two ends are horns 37. The ring 36 is connected to the small-diameter end of the horn 37. The two ends of the outer shell 32 are respectively connected to the large-diameter end of the horn 37 on the same side. An annular cavity 33 is provided between the inner core 31 and the outer shell 32. The annular cavity 33 is flush with the two ends of the ring 36. The two ends of the ring 36 are provided with symmetrical annular gaps 35. At least one connecting rod 34 is provided in the annular cavity 33. One end of the connecting rod 34 is connected to The outer wall of the ring 36 is connected to the inner wall of the outer shell 32 at the other end. The connecting rod 34 is located between the annular gaps 35 at both ends. The air-bearing support unit 3 greatly reduces the risk of surface scratches and is suitable for ultra-fine guide wires 6 with high surface requirements. The air film provides uniform damping and centering force, making vibration transmission smooth and uniform. The annular cavity 33 temporarily stores the compressed air flowing in from the single air inlet and makes the pressure instantly equal in the circumferential direction, eliminating pressure fluctuations and ensuring that the compressed air can be supplied to the annular gap 35 at the same pressure without dead angles in 360 degrees.

[0020] In one embodiment, such as Figure 2 As shown, the annular slit 35 and the circular ring 36 are coaxial. The width of the annular slit 35 is 10-20μm, and the inner diameter of the circular ring 36 is 0.20mm-0.35mm, ensuring that a uniform, stable and controllable annular air film gap is formed between the guide wire 6 and the inner wall of the circular ring 36.

[0021] In one embodiment, such as Figure 1 and Figure 2 As shown, an air inlet 38 is provided in the middle of the side wall of the outer shell 32. An air inlet pipe 81 extends into the air inlet 38. One end of the air inlet pipe 81 is connected to the annular cavity 33, and the other end is connected to the air source 8. The air inlet 38 and the outer wall of the air inlet pipe 81 are sealed to prevent air leakage. The air source 8 is clean air or nitrogen.

[0022] In one embodiment, the focal plane generated by the field lens inside the scanning head 7 is perpendicular to the axis of the guide wire 6, and the guide wire 6 is located at the center of the focal plane, ensuring that an annular heating zone can be formed around the guide wire 6 to ensure the heating effect.

[0023] In one embodiment, such as Figure 1 As shown, the air-floating support unit 3 of the vibration module 1 and the air-floating support unit 3 of the laser irradiation module 2 are coaxial when the vibration is not turned on, so as to avoid residual stress caused by the height difference.

[0024] In one embodiment, such as Figure 1As shown, the distance between the vibration module 1 and the laser irradiation module 2 is 10-20cm to avoid vibration affecting the stability of subsequent heating. The distance between the two air-bearing support units 3 of the laser irradiation module 2 is 10-20cm to ensure that the guide wire 6 of the laser heating section is suspended.

[0025] Usage: Combine Figures 1-2 As shown, compressed air flows in from the air inlet 38 on the side of the air-bearing support unit 3, filling the annular cavity 33. Driven by pressure, the gas is ejected through the annular gap and shot towards the throat in the center. The two airflows at both ends converge and collide in the throat region, forming a complex vortex and high-pressure zone. However, due to the Venturi effect, the net pressure at the center point of the throat is lower than the pressure at the two air inlets, thus forming a stable low-pressure suspension point, which suspends the guide wire 6. The vibrator 4 drives the entire air-bearing support unit 3 to perform transverse high-frequency vibration perpendicular to the guide wire 6. The periodic pressure fluctuation is effectively coupled to the guide wire 6, applying a periodic alternating force to the guide wire 6 to eliminate residual stress. The laser irradiation module 2 performs non-contact, rapid, localized, and gentle heating on the moving guide wire 6. The thermal expansion effect generates thermal stress, which further promotes dislocation reorganization. At the same time, the thermal energy accelerates atomic diffusion, further eliminating residual stress.

[0026] This utility model has been described by the above-described embodiments; however, these embodiments are merely examples for implementing this utility model. It must be noted that the disclosed embodiments do not limit the scope of this utility model. Conversely, any modifications and refinements made without departing from the spirit and scope of this utility model are within the scope of patent protection of this utility model.

Claims

1. A medical device guidewire stress relief device, characterized in that: The system includes a vibration module (1) and a laser irradiation module (2). The vibration module (1) includes an air-bearing support unit (3) and an exciter (4). The air-bearing support unit (3) is fixed at one end of a vibration transmission rod (41), and the other end of the vibration transmission rod (41) is fixed on the mover of the exciter (4). The vibration direction of the exciter (4) is perpendicular to the axis of the guide wire (6). The laser irradiation module (2) includes a scanning head (7), a laser (9), and at least two air-bearing support units (3). The two air-bearing support units (3) of the laser irradiation module (2) are fixed on the top of the support rod (5) and are coaxial. The scanning head (7) is set between the two air-bearing support units (3). The scanning head (7) is electrically connected to the laser (9) through a flexible optical fiber (91). The laser emitted by the scanning head (7) is perpendicular to the length direction of the guide wire (6).

2. The medical device guidewire stress relief device as described in claim 1, characterized in that: The air-float support unit (3) includes an inner core (31) and an outer shell (32). The middle section of the inner core (31) is a ring (36), and the two ends are horns (37). The ring (36) is connected to the small-diameter end of the horn (37). The two ends of the outer shell (32) are respectively connected to the large-diameter end of the horn (37) on the same side. An annular cavity (33) is provided between the inner core (31) and the outer shell (32). The annular cavity (33) is flush with the two ends of the ring (36). The two ends of the ring (36) are provided with symmetrical annular gaps (35). At least one connecting rod (34) is provided in the annular cavity (33). One end of the connecting rod (34) is connected to the outer wall of the ring (36), and the other end is connected to the inner wall of the outer shell (32). The connecting rod (34) is located between the annular gaps (35) at both ends.

3. The medical device guidewire stress relief device as described in claim 2, characterized in that: The annular slit (35) is coaxial with the circular ring (36), the width of the annular slit (35) is 10-20μm, and the inner diameter of the circular ring (36) is 0.20mm-0.35mm.

4. The medical device guidewire stress relief device as described in claim 2, characterized in that: An air inlet (38) is provided in the middle of the side wall of the outer shell (32). An air inlet pipe (81) extends into the air inlet (38). One end of the air inlet pipe (81) is connected to the annular cavity (33), and the other end is connected to the air source (8). The air inlet (38) and the outer wall of the air inlet pipe (81) are sealed together.

5. The medical device guidewire stress relief device as described in claim 1, characterized in that: The focal plane generated by the field lens inside the scanning head (7) is perpendicular to the axis of the guide wire (6), and the guide wire (6) is located at the center of the focal plane.

6. The medical device guidewire stress relief device as described in claim 1, characterized in that: The air-bearing support unit (3) of the vibration module (1) is coaxial with the air-bearing support unit (3) of the laser irradiation module (2) when the vibration is not turned on.

7. The medical device guidewire stress relief device as described in claim 1, characterized in that: The distance between the vibration module (1) and the laser irradiation module (2) is 10-20cm, and the distance between the two air-bearing support units (3) of the laser irradiation module (2) is 10-20cm.

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