Guide wire bending device and guide wire bending method

Abstract

This invention relates to a guidewire bending device and a guidewire bending method. The guidewire bending device includes a first rotating member and a second rotating member that are rotatably connected. The first rotating member has a first groove, and the second rotating member has a second groove. The diameter of the first groove is smaller than the diameter of the second groove. The corresponding guidewire bending method involves bending the guidewire sequentially along the first and second grooves to achieve overall bending of the guidewire. This invention, by providing first and second grooves with different diameters on the first and second rotating members respectively, and using the first groove to bend the first segment of the guidewire and the second groove to bend the second segment of the guidewire, and by using the same device to bend a single guidewire simultaneously, can bend the guidewire into first and second segments with different bending radii. This allows the guidewire to cope with complex bends in various blood vessels, thus providing good adaptability to various surgical situations.

Description

Technical Field

[0001] This invention relates to the field of interventional medical device technology, and in particular to a guidewire bending device and a guidewire bending method. Background Technology

[0002] Aortic disease is a cardiovascular disease that is prevalent among the elderly and seriously threatens human health. It is showing an increasing trend year by year with the aging of the population. It mainly includes aortic dissection, aortic aneurysm, etc. In recent years, the advancement of non-invasive medical imaging technology has led to an increasing detection rate of such diseases year by year.

[0003] Currently, the mainstream clinical treatment for this type of disease is the placement of a vascular stent. Stent placement requires the coordinated use of a delivery system and a guidewire. Generally, the guidewire is first inserted through a blood vessel to the lesion site, and then the delivery system carrying the stent is inserted along the guidewire into the lesion site for release.

[0004] Because blood vessels within the body exhibit a variety of complex bends, the guidewire used for insertion must also have a bend similar to that of the target vessel. This ensures that the straight tip of the guidewire does not damage the curved vessel wall during insertion. Current solutions to avoid guidewire damage rely on the surgeon's experience to bend the guidewire before use. This undoubtedly increases surgical time and increases risks to the patient. Furthermore, manual operation leads to inaccurate guidewire bending dimensions and unsatisfactory bending results. Similarly, reliable equipment for producing guidewires with specific bend shapes is lacking in factory manufacturing. To address this issue—namely, to make guidewire bending simple and reliable—a reliable guidewire bending device and a corresponding guidewire bending method are needed. Summary of the Invention

[0005] Based on this, the present invention provides a guide wire bending device and a guide wire bending method to solve the problem of lacking an effective means of bending guide wires.

[0006] A guide wire bending device is proposed, comprising a first rotating component and a second rotating component that are rotatably connected. The first rotating component has a first groove, and the second rotating component has a second groove. The diameter of the first groove is smaller than the diameter of the second groove.

[0007] In one embodiment, the second rotating member includes an open mounting groove, and when the first rotating member is inserted into the mounting groove, the inner wall of the mounting groove covers a portion of the first groove.

[0008] In one embodiment, a base is also included, to which the second rotatable member is rotatably connected, the base including a fence with an opening that covers a portion of the second groove.

[0009] In one embodiment, the first rotating member is provided with a positioning block, and the second rotating member is provided with a plurality of positioning grooves. The positioning block can be engaged in any of the positioning grooves to limit the relative rotation of the first rotating member and the second rotating member.

[0010] In one embodiment, the positioning block is detachably connected to the first rotating member.

[0011] In one embodiment, the positioning block can extend or retract from the first rotating member.

[0012] In one embodiment, a locking block is also included. The second rotating member has a first slot, and the base has a second slot corresponding to the first slot. One end of the locking block is engaged in the first slot, and the other end is engaged in the second slot to limit the relative rotation of the second rotating member and the base.

[0013] In one embodiment, the second rotating member is provided with a plurality of first slots and / or the base is provided with a plurality of second slots.

[0014] In one embodiment, the base is provided with a plurality of extension slots corresponding to the positioning slot. The positioning slot passes through the second rotating member. The length of the positioning block is greater than the length of the positioning slot. The positioning block includes a first state and a second state. When the positioning block is in the first state, the positioning block is partially engaged in the positioning slot to connect the first rotating member and the second rotating member. When the positioning block is in the second state, the positioning block is fully engaged in the positioning slot and engaged in the extension slot to connect the first rotating member, the second rotating member and the base.

[0015] A guide wire bending method is also provided, including the guide wire bending device described above, the steps of which are as follows:

[0016] S1 releases the circumferential constraint between the first rotating member and the second rotating member, and locks the circumferential constraint between the second rotating member and the base.

[0017] S2 Place the first end of the guide wire into the first groove, rotate the first rotating component, and drive the guide wire to bend along the first groove;

[0018] S3 After the guide wire bends along the first groove to a predetermined extent, the circumferential restriction between the first rotating member and the second rotating member is restored to a locked state, and the circumferential restriction between the second rotating member and the base is released. Then, the second rotating member is rotated to drive the guide wire to bend along the second groove.

[0019] S4 After the guide wire is bent along the second groove to a predetermined extent, the circumferential constraint between the second rotating member and the base is restored to a locked state to maintain the shape of the guide wire;

[0020] S5 heats the guide wire bending device, maintaining the temperature at 350~400℃ for 20~40 minutes to achieve thermoplastic deformation of the guide wire.

[0021] The guidewire bending device and method provided by the present invention, by setting a first groove and a second groove with different diameters on the first rotating member and the second rotating member respectively, and using the first groove to bend the first segment of the guidewire and the second groove to bend the second segment of the guidewire, and using the same device to bend a single guidewire simultaneously, can bend the guidewire into first segments and second segments with different bending radii, so that the guidewire can cope with various complex bends in blood vessels, and thus has good adaptability to various surgical situations. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the target guidewire in one embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the plastic bending device in one embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the operation of the plastic bending device in one embodiment of the present invention;

[0025] Figure 4 This is an exploded view of the plastic bending device in one embodiment of the present invention;

[0026] Figure 5 This is an exploded view of the plastic bending device in another embodiment of the present invention;

[0027] Figure 6 This is an exploded view of the plastic bending device in another embodiment of the present invention. Detailed Implementation

[0028] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0029] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] In the field of interventional medical devices, the end of a medical device implanted in the human or animal body that is closer to the operator is generally called the "proximal end," and the end that is farther from the operator is called the "distal end." Based on this principle, the "proximal end" and "distal end" of any component of a medical device are defined. "Axial direction" generally refers to the length of the medical device during delivery, and "radial direction" generally refers to the direction perpendicular to the "axial direction." Based on this principle, the "axial direction" and "radial direction" of any component of a medical device are defined.

[0032] In the embodiments of the present invention, the shaping device is used to bend the shaping guidewire into a specific shape at the time of manufacture. Based on different vascular structures, the degree of bending of the shaping guidewire is different, and the degree of bending at different positions of the same guidewire may be different from one another.

[0033] like Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of the target guidewire 10 in one embodiment of the present invention. The distal end of the target guidewire 10 needs to be bent to form a first segment 11 and a second segment 12. Due to the complexity of the corresponding vascular structure, the first segment 11 and the second segment 12 generally have different bending states. Specifically, the diameter D1 of the first segment 11 is between 5-20 mm, and the diameter D2 of the second segment 12 is between 50-80 mm. In this embodiment, the diameter D1 of the first segment 11 is 15 mm, and the diameter D2 of the second segment 12 is 55 mm.

[0034] Example 1

[0035] like Figure 2-3 As shown, Figure 2 This is a schematic diagram of the plastic bending device 20 in one embodiment of the present invention. Figure 3 This is a schematic diagram of the operation of the plastic bending device 20 in one embodiment of the present invention.

[0036] The bending device 20 includes a base 210 and a rotating shaft assembly 220. The rotating shaft assembly 220 includes a first rotating member 221 and a second rotating member 222. The first rotating member 221 has a first groove 2211 along its circumferential direction on its side, and the second rotating member 222 has a second groove 2221 along its circumferential direction on its side. Both the first groove 2211 and the second groove 2221 are annular grooves, and the radius of the first groove 2211 (i.e., the distance from the bottom surface of the groove to the axis of the first rotating member 221) is smaller than the radius of the second groove 2221 (i.e., the distance from the bottom surface of the groove to the axis of the second rotating member 222). To make the bending radii of the first and second segments of the guidewire 13 different, so that the guidewire 13 can adapt to various curved blood vessels, the first groove 2211 corresponds to the processing of the first segment of the guidewire 13, and the second groove 2221 corresponds to the processing of the second segment of the guidewire 13.

[0037] In this embodiment, the first groove 2211 and the second groove 2221 are located on the same horizontal plane, ensuring that excessive bending does not occur in any part of the guide wire 13 during processing, thus guaranteeing a smooth curve for the final formed guide wire 13. Furthermore, the rotating shaft assembly 220 can rotate relative to the base 210. The base 210 includes a semi-open enclosure 2101. The enclosure 2101 covers a portion of the second groove 2221. The guide wire 13 enters through the opening of the base 210, and the inner wall of the enclosure of the base 210 holds the guide wire 13 within the second groove 2221, thereby shaping the second section of the guide wire 13. In other embodiments, there may be a height difference between the first groove 2211 and the second groove 2221, designed according to the bending requirements of the guide wire to be produced.

[0038] The first rotating member 221 can rotate relative to the second rotating member 222, and the second rotating member 222 can rotate relative to the base 210. In order to facilitate the disassembly and installation of the second rotating member 222 and the base 210, the top of the second rotating member 222 is provided with a protrusion 223 for applying force.

[0039] Reference Figure 4 The plastic bending device 20 includes a first rotating component 221, a second rotating component 222, and a base 210, and its specific structure is as follows:

[0040] The first rotating member 221 includes a fixing member 2213 and a rotating member 2214, which are connected by threads. The rotating member 2214 has a stop 2212 on the side near the fixing member 2213. Therefore, when the fixing member 2213 is fixed to the rotating member 2214, the fixing member 2213 and the rotating member 2214 are blocked by the stop 2212, thus leaving space... Figure 2-3The first groove 2211 is located in the first groove. The stop block 2212 also facilitates the bending of the guide wire 13 along the surface of the stop block 2212. Specifically, the head end of the guide wire 13 enters the inner side of the stop block 2212. When the first section of the guide wire 13 is wound to the second turn, the second turn of the guide wire 13 is wound along the outer side of the stop block 2212. This allows the outer section of the guide wire 13 extending from the first groove 2211 to the second groove 2221 to be limited by the outer side of the stop block 2212 and the inner wall of the second rotating member 222, thus ensuring that the guide wire 13 will not shake or shift when it enters the second groove 2221 from the first groove 2211. When the first section of the guide wire 13 is a single turn, the guide wire 13 adheres to the outer side of the stop block 2212. When the guide wire 13 extends from the first groove 2211 to the second groove 2221, the stop block 2212 can also cooperate with the inner wall of the second rotating member 222 to limit the guide wire 13. In other words, the distance between the stop block 2212 and the second rotating member 222 is equal to the diameter of the guide wire 13, and the part of the guide wire 13 located between the inner walls of the stop block 2212 and the second rotating member 222 can only move along the extension direction of the guide wire 13.

[0041] At the same time, the stop block 2212 also prevents the guide wire from deforming due to the distance between the fixing part 2213 and the rotating part 2214 being too close after they are clamped together. The stop block 2212 actually serves as the bottom of the first groove 2211.

[0042] The second rotating component 222 is generally cylindrical, and a second groove 2221 surrounds the second rotating component 222 on its side. The second rotating component 222 has an open mounting groove 2222, which corresponds to the first rotating component 221. That is, when the first rotating component 221 is installed, it is inserted into the mounting groove 2222, and the inner wall of the mounting groove 2222 partially covers the first groove 2211. The opening of the mounting groove 2222 is to provide space for the guide wire 13 for subsequent processing.

[0043] The bottom of the mounting groove 2222 is provided with a shaft hole 2223 and a positioning groove 2224. The bottom of the rotating part 2214 of the first rotating part 221 is provided with a first shaft 2215 and a positioning block 2216. During installation, the first shaft 2215 is inserted into the shaft hole 2223, the positioning block 2216 is engaged in the positioning groove 2224, and the first rotating part 221 is installed in the mounting groove 2222.

[0044] In another embodiment, the outer diameters of the fixing member 2213 and the rotating member 2214 are the same, and the outer diameters of the fixing member 2213 and the rotating member 2214 are both less than or equal to the inner diameter of the mounting groove 2222, so as to ensure that the first rotating member 221 can be completely inserted into the second rotating member 222.

[0045] The inner sidewall of the mounting groove 2222 assists the first groove 2211 in fixing the guide wire. Therefore, in order to make the bending range of the first rotating member 221 on the guide wire larger, the arc of the inner sidewall of the mounting groove 2222 corresponding to the first groove 2211 is a superior arc.

[0046] The inner wall of the enclosure 2101 of the base 210 is smooth, and the base 210 has a hole 2102 in the middle. The hole 2102 is used to accommodate the second shaft (not shown in the figure) extending from the bottom of the second rotating member 222, ensuring that the second rotating member 222 can rotate relative to the base 210.

[0047] For the entire plastic bending device 20, the axis of rotation of the first rotating member 221 (the axis of the first axis) and the axis of rotation of the second rotating member 222 (the axis of the second axis) are parallel to each other. Therefore, when the second rotating member 222 rotates around its own axis of rotation, i.e., the second axis, it drives the first rotating member 221 to rotate around the second axis. Without the action of other external forces, the first rotating member 221 will not rotate relative to the first axis. In other words, when the second rotating member 222 rotates, without the action of other external forces, the first rotating member 221 will revolve around the axis of rotation of the second rotating member 222, i.e., the second axis, and the first rotating member 221 will not rotate on its own axis.

[0048] The rotation of the first rotating member 221 around its own axis of rotation and the rotation of the second rotating member 222 around their own axes of rotation are independent of each other. This design is intended to prevent the second rotating member 222 from rotating when the first rotating member 221 is rotated, and to ensure a smooth transition between the first and second sections of the guide wire 13.

[0049] It should be noted that when using the plastic bending device 20, a portion of the opening of the first groove 2211 is blocked by the inner wall of the mounting groove 2222, and the guide wire 13 located inside the first groove 2211 is shaped by the first groove 2211 in conjunction with the inner wall of the mounting groove 2222; a portion of the opening of the second groove 2221 is blocked by the inner wall of the fence 2101 of the base 210, and the guide wire 13 located inside the second groove 2221 is shaped by the second groove 2221 in conjunction with the inner wall of the fence 2101.

[0050] The guidewire shaping method corresponding to this embodiment is as follows:

[0051] In the initial state, the fixing part 2213 and the rotating part 2214 of the first rotating part 221 have been assembled, the first rotating part 221 has not yet been installed into the second rotating part 222, and the second rotating part 222 has been installed with the base 210.

[0052] The first step is to wind one end of the guide wire 13 around the stop block 2212. The section of the guide wire 13 that extends into the first groove 2211 is the first section. Rotate the first rotating member 221 to drive the guide wire 13 to wind around the first rotating member 221. In order to ensure good plasticity of the guide wire 13, it is preferable to wind it 2 turns in this embodiment.

[0053] The second step involves inserting the first rotating member 221 with the guide wire 13 into the mounting groove 2222 of the second rotating member 222. At this time, the opening of the first groove 2211 is blocked by the inner wall of the mounting groove 2222, and the guide wire 13 located inside the first groove 2211 is completely shaped by the first groove 2211 in conjunction with the inner wall of the mounting groove 2222. Then, the positioning block 2216 is inserted into the positioning groove 2224, and the second rotating member 222 is rotated. The section of the guide wire 13 adjacent to the first section to be bent becomes the second section, and the second section of the guide wire 13 is inserted into the second groove 2221. The second rotating member 222 drives the second section of the guide wire 13 to gradually be inserted into the second groove 2221, realizing the winding of the guide wire 13 around the second rotating member 222. In this embodiment, the second section of the guide wire 13 is wound twice.

[0054] The third step involves heating the shaping device at a temperature of 350-400℃ for 20-40 minutes to achieve thermoplastic deformation of the guide wire 13.

[0055] It should be noted that the above-mentioned heat treatment process and the heat treatment process mentioned in this application are generally used in the process of producing specific curved guide wires in factories, in order to make the guide wire more stable in shape, and are not necessary technical features for bending and shaping the guide wire.

[0056] Second Embodiment

[0057] The parts of the second embodiment that are the same as those in the first embodiment will not be described again. In the second embodiment, the positioning block 2216 is detachably connected to the first rotating member 221. Correspondingly, the first rotating member 221 has a snap-fit ​​structure (such as a slot) for the positioning block 2216, so the corresponding guide wire shaping method changes, as follows:

[0058] In the initial state, the fixing part 2213 and the rotating part 2214 of the first rotating part 221 have been assembled, the first rotating part 221 is installed in the mounting groove 2222 of the second rotating part 222, the positioning block 2216 has not yet been installed, and the second rotating part 222 and the base 210 are installed.

[0059] The first step is to wind one end of the guide wire 13 along the stop block 2212. The section of the guide wire 13 that extends into the first groove 2211 is the first section. Rotate the fixing member 2213 to drive the guide wire 13 to wind around the first rotating member 221. In order to ensure good plasticity of the guide wire 13, it is preferable to wind it 2 turns in this embodiment.

[0060] The second step involves engaging one end of the positioning block 2216 with the first rotating member 221 and the other end with the positioning groove 2224, thereby achieving circumferential positioning of the first rotating member 221 and the second rotating member 222. Then, the second rotating member 222 is rotated, and the section of the guide wire 13 adjacent to the first section to be bent becomes the second section. The second section of the guide wire 13 is then engaged in the second groove 2221. The second rotating member 222 drives the second section of the guide wire 13 to gradually engage in the second groove 2221, achieving the winding of the guide wire 13 around the second rotating member 222. In this embodiment, the second section of the guide wire 13 is wound twice.

[0061] The third step involves heating the shaping device at a temperature of 350-400℃ for 20-40 minutes to achieve thermoplastic deformation of the guide wire 13.

[0062] In another embodiment, the positioning block 2216 is telescopically connected to the first rotating member 221. In the first step of the guide wire shaping method corresponding to the second embodiment, the positioning block 2216 retracts into the first rotating member 221. In the second step of the guide wire shaping method corresponding to the second embodiment, the positioning block 2216 extends out of the first rotating member 221 and is engaged in the positioning groove, thereby realizing the circumferential positioning of the first rotating member and the second rotating member.

[0063] Third Embodiment

[0064] The parts of the third embodiment that are the same as those of the second embodiment will not be described again. The difference is that the second rotating member 222 and the base 210 in the third embodiment are respectively provided with a first slot and a second slot, such as... Figure 5 As shown, Figure 5 This is an exploded view of the plastic bending device 20 in the third embodiment of the present invention. In this embodiment, the second rotating member 222 and the base 210 are respectively provided with a first slot 2225 and a second slot 2103. When the first slot 2225 and the second slot 2103 are aligned, locking blocks are inserted into the first slot 2225 and the second slot 2103 to achieve circumferential limiting of the second rotating member 222 and the base 210. This can avoid the problem that the movement of the first rotating member 221 will cause the second rotating member 222 to rotate due to uneven force.

[0065] The corresponding guidewire shaping method has changed, as follows:

[0066] In the initial state, the fixing part 2213 and the rotating part 2214 of the first rotating part 221 have been assembled. The first rotating part 221 is installed in the mounting groove 2222 of the second rotating part 222. The positioning block 2216 has not yet been installed. The second rotating part 222 is installed with the base 210. The locking block has been placed between the first slot 2225 and the second slot 2103.

[0067] The first step is to wind one end of the guide wire 13 along the stop block 2212. The section of the guide wire 13 that extends into the first groove 2211 is the first section. Rotate the fixing member 2213 to drive the guide wire 13 to wind around the first rotating member 221. In order to prevent the bent section of the guide wire 13 from freely detaching from the first groove 2211, it is preferable to wind it 2 turns in this embodiment.

[0068] The second step is to engage one end of the positioning block 2216 with the first rotating member 221 and the other end with the positioning groove 2224 to achieve circumferential positioning of the first rotating member 221 and the second rotating member 222. Then, the locking block is removed to unlock the second rotating member 222 and the base 210.

[0069] Third, rotate the second rotating member 222. The section of the guide wire 13 adjacent to the first section to be bent becomes the second section. The second section of the guide wire 13 is inserted into the second groove 2221. The second rotating member 222 drives the second section of the guide wire 13 to gradually be inserted into the second groove 2221, realizing the winding of the guide wire 13 around the second rotating member 222. In this embodiment, the second section of the guide wire 13 is wound 2 turns.

[0070] The fourth step involves heating the shaping device at a temperature of 350-400℃ for 20-40 minutes to achieve thermoplastic deformation of the guide wire 13.

[0071] In another embodiment, the third step of the guidewire shaping method further includes the following steps:

[0072] When the guide wire 13 is bent into the predetermined shape, the locking block is reinstalled to maintain the shape of the guide wire, so as to facilitate subsequent thermoplastic deformation.

[0073] In another embodiment, corresponding to this step, the second rotating member 222 is provided with a plurality of first slots 2225, and the base 210 is provided with a plurality of second slots 2103, and the second rotating member 222 and the base 210 can be circumferentially locked at multiple positions.

[0074] In another embodiment, the second rotating member 222 and the base 210 are respectively provided with multiple holes. By connecting the second rotating member 222 and the base 210 with a pin, the circumferential positioning of the second rotating member 222 and the base 210 can be achieved.

[0075] Fourth embodiment

[0076] The parts that are the same as those in the fourth embodiment and the second embodiment will not be described again here. The difference is that the axial length of the positioning groove 2224 on the second rotating member 222 in the fourth embodiment changes, and the positioning groove 2224 penetrates through the second rotating member. The base 210 in the fourth embodiment is provided with an extension groove. The length of the positioning block 2216 is greater than the length of the positioning groove 2224. Therefore, the positioning block 2216 can engage the first rotating member 221, the second rotating member 222, and the base 210. This arrangement allows multiple state changes to be achieved using a single positioning block 2216, increasing the overall integrity of the device.

[0077] In another embodiment, the positioning block 2216 can extend and retract from the first rotating member 221. When the positioning block 2216 is in the extended state and is engaged in the positioning groove 2224, it is equivalent to the "installation" of the positioning block 2216 in the second embodiment.

[0078] The guidewire shaping method in the fourth embodiment has changed, as detailed below:

[0079] In the initial state, the fixing part 2213 and the rotating part 2214 of the first rotating part 221 have been assembled, the first rotating part 221 is installed in the mounting groove 2222 of the second rotating part 222, the positioning block 2216 has not yet been installed, and the second rotating part 222 and the base 210 are installed.

[0080] The first step is to wind one end of the guide wire 13 along the stop block 2212. The section of the guide wire 13 that extends into the first groove 2211 is the first section. Rotate the fixing member 2213 to drive the guide wire 13 to wind around the first rotating member 221. In order to prevent the bent section of the guide wire 13 from freely detaching from the first groove 2211, it is preferable to wind it 2 turns in this embodiment.

[0081] The second step is to engage one end of the positioning block 2216 with the first rotating member 221 and the other end with the positioning groove 2224, while simultaneously controlling the positioning block 2216 not to contact the extension groove of the base 210, thereby achieving circumferential positioning of the first rotating member 221 and the second rotating member 222, and enabling the second rotating member 222 and the base 210 to rotate relative to each other.

[0082] Third, rotate the second rotating member 222. The section of the guide wire 13 adjacent to the first section to be bent becomes the second section. The second section of the guide wire 13 is inserted into the second groove 2221. The second rotating member 222 drives the second section of the guide wire 13 to gradually be inserted into the second groove 2221, realizing the winding of the guide wire 13 around the second rotating member 222. In this embodiment, the second section of the guide wire 13 is wound 2 turns.

[0083] The fourth step involves pushing the positioning block 2216 into the extension groove of the base 210, so that the positioning block 2216 simultaneously locks the first rotating member 221, the second rotating member 222 and the base 210 in a circumferential manner. The thermoplastic deformation of the guide wire 13 is achieved by heating the shaping device at a temperature of 350~400℃ for 20~40 minutes.

[0084] In another embodiment, the base 210 is provided with a plurality of extension slots, and when the second rotating member 222 rotates to a plurality of different positions relative to the base 210, the second rotating member 222 can achieve mutual circumferential locking with the base 210.

[0085] Fifth Embodiment

[0086] The parts of the fifth embodiment that are the same as those in the first embodiment will not be described again here. The difference is that the first rotating member 221 does not include a positioning block 2216 similar to that in the first embodiment, and the second rotating member 222 does not include a positioning groove 2224 similar to that in the first embodiment. Its first shaft 2215 has a thread on its surface, such as... Figure 6 As shown, Figure 6 This is an exploded view of the plastic bending device 20 in the fifth embodiment of the present invention. The first shaft 2215 of the first rotating member 221 is threaded and can be threadedly connected to the shaft hole 2223 of the second rotating member 222. After the fixing member 2213 and the rotating member 2214 are fixed to each other, the rotating member 2214 can be fixed to the second rotating member 222 by rotating the fixing member 2213.

[0087] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0088] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A guide wire bending device, characterized in that, It includes a first rotating component and a second rotating component that are rotatably connected. The first rotating component has a first groove, and the second rotating component has a second groove. The diameter of the first groove is smaller than the diameter of the second groove. The second rotating component includes an open mounting groove, and when the first rotating component is inserted into the mounting groove, the inner wall of the mounting groove covers a portion of the first groove. The guide wire bending device also includes a base, and the second rotating member is rotatably connected to the base. The base includes a fence with an opening, which covers a portion of the second groove.

2. The guide wire bending device according to claim 1, characterized in that, The first rotating component is provided with a positioning block, and the second rotating component is provided with a plurality of positioning grooves. The positioning block can be engaged in any of the positioning grooves to limit the relative rotation of the first rotating component and the second rotating component.

3. The guide wire bending device according to claim 2, characterized in that, The positioning block is detachably connected to the first rotating component.

4. The guide wire bending device according to claim 2, characterized in that, The positioning block can extend or retract from the first rotating component.

5. The guide wire bending device according to any one of claims 1-4, characterized in that, It also includes a locking block. The second rotating member is provided with a first slot, and the base is provided with a second slot corresponding to the first slot. One end of the locking block is inserted into the first slot, and the other end is inserted into the second slot to limit the relative rotation of the second rotating member and the base.

6. The guide wire bending device according to claim 5, characterized in that, The second rotating component is provided with a plurality of first slots and / or the base is provided with a plurality of second slots.

7. The guide wire bending device according to claim 2, characterized in that, The base is provided with a plurality of extension slots corresponding to the positioning slot. The positioning slot passes through the second rotating member. The length of the positioning block is greater than the length of the positioning slot. The positioning block includes a first state and a second state. When the positioning block is in the first state, the positioning block is partially engaged in the positioning slot to connect the first rotating member and the second rotating member. When the positioning block is in the second state, the positioning block is fully engaged in the positioning slot and engaged in the extension slot to connect the first rotating member, the second rotating member and the base.

8. A guide wire bending method, comprising the guide wire bending device according to any one of claims 1-7, comprising the following steps: S1 releases the circumferential constraint between the first rotating member and the second rotating member, and locks the circumferential constraint between the second rotating member and the base. S2 Places the first end of the guide wire into the first groove, rotates the first rotating component, and causes the guide wire to bend along the first groove; S3 After the guide wire bends along the first groove to a predetermined extent, the circumferential restriction between the first rotating member and the second rotating member is restored to a locked state, and the circumferential restriction between the second rotating member and the base is released. Then, the second rotating member is rotated to drive the guide wire to bend along the second groove. S4 After the guide wire is bent along the second groove to a predetermined extent, the circumferential constraint between the second rotating member and the base is restored to a locked state to maintain the shape of the guide wire; S5 heats the guide wire bending device to achieve thermoplastic deformation of the guide wire.

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