Force-value protection component and ablation handle

Abstract

Provided are a force-value protection component (1000) and an ablation handle. The force-value protection component (1000) comprises: a force transmission portion (100), a limiting portion (200), and a tension generating portion (300). The force transmission portion (100) is fixedly connected to the limiting portion (200), and the limiting portion (200) contacts the tension generating portion (300); the force transmission portion (100) is configured for transmitting a tensile force to a protected object and transmitting a reaction force of the tensile force to the limiting portion (200); and the limiting portion (200) is configured for limiting displacement of the force transmission portion (100), such that the protected object is no longer subjected to tensile force once a predefined external force value is reached. The force-value protection component (1000) protects a target object in a timely manner when an external force applied to the target object reaches a predefined external force value, thereby preventing the target object from being further damaged by the external force. Applying the force-value protection component to an ablation handle effectively prevents basket overexpansion caused by improper operation, thereby reducing the risk of vascular damage.

Description

Force protection components and ablation handle

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411706407.6, filed on November 26, 2024, entitled "Force Protection Member and Ablation Handle", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of force protection, and more specifically, to a force protection component and an ablation handle. Background Technology

[0004] Interventional medical devices are equipment used in minimally invasive surgery, designed to enter the patient's body through small incisions or natural cavities for diagnosis, treatment, or surgical procedures. Interventional medical devices may include catheters, stents, ablation handles, balloons, etc., enabling interventional treatment of various diseases, such as cardiovascular diseases, tumors, and neurological disorders.

[0005] In interventional procedures, surgeons apply force by manipulating a handle or controller, which is transmitted to the working end of the instrument, such as the tip of a catheter or ablation handle, via a connecting rod or transmission device. However, in high-risk interventional procedures, operators face the risk of applying excessive external force, especially when dealing with fragile tissues such as blood vessels and nerves. For example, in interventional ablation surgery, improper operation or equipment malfunction can lead to over-expansion of the basket, causing blood vessel rupture, tissue damage, and even affecting the patient's overall health and treatment outcome.

[0006] Therefore, there is a need for a force protection component that can promptly protect the target object from further external force damage when the external force reaches a preset value. Summary of the Invention

[0007] In view of the above problems, the purpose of this application is to provide a force protection component and an ablation handle. Through the coordinated work of the force transmission part, the limiting part and the tension generation part, the external force is accurately fed back, ensuring that when the preset external force value is reached, further tension transmission can be stopped in time, effectively protecting the target object and reducing the potential risk of damage.

[0008] In a first aspect, embodiments of this application provide a force protection component, comprising: a force transmission part, a limiting part, and a tension generating part; the force transmission part is fixedly connected to the limiting part, and the limiting part contacts the tension generating part; the force transmission part is configured to transmit tension to the protected object and transmit the reaction force of the tension to the limiting part; the limiting part is configured to restrict the displacement of the force transmission part so that the protected object is no longer subjected to tension when a preset external force value is reached; the tension generating part is configured to receive the external force and drive the limiting part to generate displacement, so that the limiting part drives the force transmission part to generate displacement.

[0009] In the above implementation process, the force protection component provided in this application embodiment achieves precise feedback of external force through the coordinated operation of the force transmission part, the limiting part, and the tension generating part. This ensures that when the preset external force value is reached, further tension transmission can be promptly prevented, effectively protecting the target object and reducing potential damage risks. Applying the force protection component provided in this application embodiment to medical devices can significantly improve the safety and reliability of medical devices during high-risk operations, helping to reduce the occurrence of medical accidents.

[0010] Optionally, in this embodiment, the limiting part includes a central limiting member; the central limiting member extends from a first end of the limiting part toward the tension generating part in a first direction; the second end of the central limiting member is fixedly connected to the tension generating part; the central limiting member is configured to drive the limiting part to move in the first direction when the tension generating part receives an external force that does not reach a preset external force value, so that the limiting part drives the power transmission part to move in the first direction; and is configured to prevent the protected object from being subjected to tension when the preset external force value is reached.

[0011] In the above implementation process, the central limiting member in the force protection component provided in this application embodiment can drive the limiting part and the force transmission part to move when the preset external force value is not reached, and when the preset external force value is reached, it can react in a very short time and promptly limit the further transmission of tensile force, thereby quickly and effectively protecting the target object.

[0012] Optionally, in this embodiment, the limiting part further includes a limiting cavity; a limiting head is provided at the first end of the central limiting member; the limiting cavity is disposed within the limiting part along a first direction and configured to constrain the movement direction and movement distance of the central limiting member relative to the limiting part; the size of the limiting head matches the size of the limiting cavity and is configured to drive the limiting part to move when the tension generating part receives an external force that does not reach a preset external force value; and is configured to move within the limiting cavity along the first direction when the tension generating part receives an external force that reaches a preset external force value.

[0013] Optionally, in this embodiment, the limiting cavity has a uniform size in the first direction; the limiting part further includes a limiting accessory having a limiting strip and a limiting spring; the limiting strip is engaged with the limiting head in the second direction; the limiting spring is sleeved on the limiting strip in the second direction; the limiting spring is configured to generate compression deformation when the tension generating part receives an external force that does not reach a preset external force value; and is configured to restore compression deformation when the tension generating part receives an external force that reaches a preset external force value; the limiting strip is configured to generate friction with the limiting head and generate compression force on the limiting spring when the tension generating part receives an external force that does not reach a preset external force value; and is configured to release the limiting head and drive the limiting spring to restore compression deformation when the tension generating part receives an external force that reaches a preset external force value.

[0014] In the above implementation process, the force protection component provided in this application embodiment, through the limiting cavity, limiting strip and limiting spring, the friction between the limiting strip and the limiting head and the compression deformation of the limiting spring work together to ensure that the power transmission part can be displaced in the first direction when the preset external force value is not reached; and when the preset external force value is reached, the protection mechanism is quickly triggered, the limiting head is disengaged from the limitation of the limiting strip, and the external force is effectively prevented from continuing to be transmitted to the force transmission part.

[0015] Optionally, in this embodiment, the limiting cavity includes a first sub-cavity and a second sub-cavity; the central limiting member further includes a central rod; the length of the first sub-cavity in the first direction is greater than the length of the limiting head in the first direction; the size of the first sub-cavity is the same as the size of the limiting head, and the size of the second sub-cavity is greater than the size of the limiting head; the size of the central rod is smaller than the size of the limiting head; the first sub-cavity is configured to generate friction with the limiting head and drive the limiting part to move when the tension generating part receives an external force that does not reach a preset external force value; the second sub-cavity is configured to accommodate the limiting head when the tension generating part receives an external force that reaches a preset external force value.

[0016] In the aforementioned implementation process, the force protection component provided in this application effectively controls the applied external force by dividing the limiting cavity into a first sub-cavity and a second sub-cavity. When the preset external force value is not reached, the limiting head generates friction with the inner wall of the first sub-cavity, causing the limiting part to displace; while when the external force reaches the preset value, the limiting head breaks free from the first sub-cavity and enters the larger second sub-cavity, thereby avoiding further force on the protected object. This structure can ensure that the force transmission part no longer transmits force to the protected object when the external force reaches the preset external force value, thereby avoiding the negative effects of excessive force application.

[0017] Optionally, in this embodiment, the first sub-cavity is provided with an opening; the opening is configured such that when the tension generating part receives an external force that does not reach a preset external force value, deformation is generated based on the compression of the limiting head, so as to realize the displacement of the limiting head relative to the limiting part in the first direction.

[0018] In the above implementation process, the first sub-cavity of the force protection component provided in this application embodiment is provided with an opening, thereby allowing the limiting head to deform under the action of external force, realizing adaptation and response to external force, and enhancing the flexibility and safety of the entire force protection component. The opening design may simplify the manufacturing and assembly process of the component, making the overall structure easier to produce and maintain, and extending its service life.

[0019] Optionally, in this embodiment, the force protection component further includes a guide rail with multiple locking slots; the limiting part further includes a locking element; the locking slots and locking element are configured to restrict the limiting part from autonomously displacing in the guide rail when the tension generating part receives an external force reaching a preset external force value.

[0020] In the above implementation process, the force protection component provided in this application embodiment is also provided with a guide rail and a locking element with a locking groove, which enhances the stability and safety of the force protection component under the applied force conditions, ensures that the autonomous displacement of the limiting part can be effectively restricted when the preset external force value is reached, and further improves the reliability and applicability of the system.

[0021] Optionally, in this embodiment of the application, the force protection member further includes a slide groove; the slide groove is configured to accommodate the limiting part and the tension generating part, and to provide the limiting part and the tension generating part with movement space in a first direction.

[0022] Optionally, in this embodiment, the tension generating part includes a sleeve rod with a limiting groove; the limiting part includes a limiting rod and a limiting member; the sleeve rod is sleeved outside the limiting rod; the limiting member is disposed on the limiting rod and extends out of the sleeve rod through the limiting groove; the limiting member is configured to displace in the limiting groove when the tension generating part receives an external force that does not reach a preset external force value; and is configured to disengage from the limiting groove when the tension generating part receives an external force that reaches the preset external force value.

[0023] In the above implementation process, the movement and disengagement mechanism of the limiting component within the limiting groove enables precise control of the external force applied to the target object, ensuring that it does not exceed the preset external force value, thereby effectively protecting the object from damage. Simultaneously, the flexible movement of the limiting component allows the force protection structure to respond quickly to changes in external force, enhancing operational safety. In practical applications, the component parameters can be adjusted according to requirements to adjust the corresponding preset external force value, making the structure more adaptable.

[0024] Optionally, in the embodiments of this application, the limiting part and the tension generating part are provided with dampers, and the dampers are configured to provide initial damping force.

[0025] In the above implementation process, the force protection component in this embodiment can effectively achieve precise control of the preset external force value by setting a damper and adjusting relevant parameters. Taking intravascular ablation as an example, by applying tension to make the basket and electrode adhere tightly to the blood vessel wall, the force protection component can promptly identify and respond to the applied external force under the combined action of reaction force and friction. When the set critical detachment force value is reached, it automatically protects the target object, avoiding further damage. By optimizing the damper material, adjusting the friction force and the characteristics of the limiting component, the preset external force value can be flexibly adjusted, thereby improving the safety and reliability of the force protection component and ensuring effective prevention of damage to sensitive tissues in practical applications.

[0026] Optionally, in this embodiment, the limiting part includes a track gear; the tension generating part includes a knob and a rotating gear; the knob is connected to the rotating gear and configured to drive the rotating gear to rotate when the knob receives an external force; the rotating gear meshes with the track gear and is configured to drive the track gear to move in a first direction when the rotating gear rotates; the track gear is configured to drive the power transmission part to move in the first direction when the tension generating part receives an external force that does not reach a preset external force value; the rotating gear and the track gear are further configured to slip when the tension generating part receives an external force that reaches a preset external force value.

[0027] In the aforementioned process, the combination of track gears and rotating gears enables precise power transmission. The gear meshing effectively amplifies the force applied to the knob, thereby improving the overall operational sensitivity and response speed. On the other hand, the use of a slip-tooth mechanism effectively prevents excessive force application when the preset external force value is reached.

[0028] Optionally, in this embodiment, the force protection component further includes a reset part having a reset button, a reset spring, a connecting rod, and a reset block; the reset button is connected to the reset block via the connecting rod; the reset spring is sleeved on the connecting rod; the surface of the reset block near the track gear is configured as an inclined surface facing the track gear; the reset button is configured to control the displacement of the reset block in the second direction when the reset button receives an external force; the reset spring is configured to restore the initial position of the reset block in the second direction when the external force received by the reset button is removed; the reset block is configured to contact the track gear and compress the track gear to displace along the first direction.

[0029] In the above implementation process, by setting a reset part, the force protection component can be effectively reset quickly after reaching the preset external force value, ensuring that the force protection component can respond to new external force input at any time during use. The setting of the reset part improves the ease of operation of the force protection component.

[0030] Optionally, in this embodiment, the limiting part includes a permanent magnet and a coil; the pulling force generating part includes a current generating switch in the same direction and a current generating switch in the opposite direction; the coil is wound around the permanent magnet; the current generating switch in the same direction and the current generating switch in the opposite direction are respectively connected to the coil; the coil and the permanent magnet are configured to generate a repulsive force when the current generating switch in the same direction is closed, so as to drive the limiting part to move in the positive direction of the first direction; and are configured to generate an attractive force when the current generating switch in the opposite direction is closed, so as to drive the limiting part to move in the negative direction of the first direction.

[0031] In the above implementation process, the force protection component provided in this application embodiment also achieves precise adjustment of the limiting part through a magnetic field controlled by current. Compared with traditional mechanical devices, electromagnetic control not only improves response speed but also reduces mechanical wear and extends equipment life. In addition, the adjustment of current makes the entire force protection component more adaptable, allowing for rapid adjustment of the protection force value according to actual needs, thereby improving overall safety and reliability.

[0032] In a first aspect, embodiments of this application provide an ablation handle, which is a force protection component of the first aspect of this application.

[0033] In the above implementation process, after the force protection component provided in the embodiment of this application is set on the ablation handle, when the functional component on the handle is retracted, the basket at the distal end of the handle can expand. When the basket is fully attached to the blood vessel wall, due to the presence of the force protection component, the tension generating part will not be able to continue to expand the basket, thereby reducing or even avoiding the expansion damage of the basket to the blood vessel.

[0034] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 is a structural schematic diagram of the force protection component provided in an embodiment of this application;

[0037] Figure 2 is an example diagram of the first structure of the force protection member provided in the embodiment of this application;

[0038] Figure 3 is a first example diagram of the second structure of the force protection member provided in the embodiment of this application;

[0039] Figure 4 is a second example diagram of the second structure of the force protection member provided in the embodiment of this application;

[0040] Figure 5 is a partial track diagram of the force protection component provided in this application;

[0041] Figure 6 is an example diagram of the third structure of the force protection member provided in the embodiment of this application;

[0042] Figure 7 is a disassembled schematic diagram of the sleeve, limiting rod, and limiting member provided in the embodiment of this application;

[0043] Figure 8 is another exploded view of the limiting rod and limiting member provided in the embodiment of this application;

[0044] Figure 9 is an example diagram of the fourth structure of the force protection member provided in the embodiments of this application;

[0045] Figure 10 is an example diagram of the fifth structure of the force protection member provided in the embodiments of this application;

[0046] Figure 11 is a schematic diagram of the ablation catheter provided in an embodiment of this application;

[0047] Reference numerals: Force protection component - 1000; Force transmission part - 100; Limiting part - 200; First end of limiting part - 200a; Central limiting member - 210; First end of central limiting member - 210a; Second end of central limiting member - 210b; Limiting head - 211; Central rod - 212; Limiting cavity - 220; First sub-cavity - 221; Second sub-cavity - 222; Opening - H; Limiting accessory - 230; Limiting strip - 231; Limiting spring - 232; Locking element - 240; Limiting rod - 250; Limiting component - 260; Track gear - 270; Permanent magnet - 280; Coil - 290; Damper - S; Tension generating part - 300; Sleeve rod - 310; Limiting groove - 311; Knob - 320; Rotating gear - 330; Guide rail - 400; Locking groove - 410; Slide groove - 500; Reset part - 600; Reset button - 610; Reset spring - 620; Connecting rod - 630; Reset pressure block - 640; Same direction current generating switch - 700; Reverse current generating switch - 800. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0050] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0051] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0052] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0053] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0054] Interventional medical devices are devices used in minimally invasive surgery, designed to enter the patient's body through small incisions or natural cavities for diagnosis, treatment, or surgical procedures. Interventional medical devices may include catheters, stents, ablation handpieces, and balloons, enabling interventional treatment for a variety of diseases, including cardiovascular diseases, tumors, and neurological disorders.

[0055] In interventional procedures, surgeons apply force by manipulating handles or controllers. This force is transmitted to the working end of instruments, such as the tip of a catheter or ablation handle, via connecting rods or transmission devices. However, in high-risk medical procedures, operators face the risk of applying excessive external force, especially when dealing with fragile tissues (such as blood vessels and nerves). Taking interventional ablation surgery as an example, improper operation or equipment malfunction may lead to over-expansion of instruments such as baskets, resulting in vascular rupture or tissue damage. This not only affects the surgical outcome but may also pose a serious threat to the patient's overall health, increasing the difficulty and risk of subsequent treatment. Therefore, a force protection component is needed that can promptly protect the target object when the external force reaches a preset value.

[0056] Based on this, the force protection component and ablation handle provided in this application embodiment can stop further force transmission when the applied external force exceeds a safety threshold through a limiting part, thereby effectively avoiding tissue damage. Applying the force protection component provided in this application embodiment to the ablation handle can not only improve the safety of ablation surgery, but also enhance the doctor's confidence in operation, reduce the probability of medical accidents, and is of great significance to patient safety and treatment effect.

[0057] Please refer to Figure 1. Figure 1 is a first structural schematic diagram of the force protection member provided in the embodiment of this application. The force protection member 1000 provided in the embodiment of this application includes: a force transmission part 100, a limiting part 200, and a tension generating part 300.

[0058] The force transmission part 100 is fixedly connected to the limiting part 200, and the limiting part 200 contacts the tension generating part 300.

[0059] The force transmission part 100 is configured to transmit tensile force to the protected object and transmit the reaction force of the tensile force to the limiting part 200; the limiting part 200 is configured to limit the displacement of the force transmission part 100 so that the protected object is no longer subjected to tensile force when the preset external force value is reached; the tensile force generating part 300 is configured to receive the external force and drive the limiting part 200 to generate displacement, so that the limiting part 200 drives the force transmission part 100 to generate displacement.

[0060] In the above implementation process, one end of the force transmission part 100 is connected to the protected object, and the other end is fixedly connected to the limiting part 200. The force transmission part 100 can ensure that the tension of the tension generating part 300 is effectively transmitted, and at the same time transmit the reaction force of the tension to the limiting part 200.

[0061] The limiting part 200 can be moved along with the tension generating part 300 when the tension transmitted by the tension generating part 300 does not reach the preset external force value; when the tension transmitted by the tension generating part 300 reaches the preset external force value, it can effectively prevent the force transmission part 100 from continuing to apply tension, thereby protecting the target object and avoiding damage.

[0062] The tension generating unit 300 is responsible for receiving external force and, under the action of the external force, driving the limiting unit 200 to move, thereby enabling the limiting unit 200 to drive the power transmission unit 100 to move. When the force received by the tension generating unit 300 exceeds a preset tension value, even if the tension generating unit 300 can drive the limiting unit 200 to move, the limiting unit 200 can no longer drive the power transmission unit 100 to move; or, when the tension received by the tension generating unit 300 exceeds the preset external force value, the tension generating unit 300 can no longer drive the limiting unit 200 to move. As shown in Figure 1, the tension generating unit 300 is configured with a seat shape that is easy to hold, but it can also be configured with other shapes. The easy-to-hold shape in Figure 1 is just an example.

[0063] In Figure 1, the force transmission part 100 is a conduit that runs through the entire force protection member 1000. However, the conduit is only fixedly connected to the limiting part 200, and the rest of the part merely passes through but is not fixedly connected. Therefore, in the force protection member 1000 provided in this application embodiment, the only component that applies force to the force transmission part 100 is the limiting part 200.

[0064] Therefore, the force protection component 1000 provided in this application embodiment achieves precise feedback of external forces through the coordinated operation of the force transmission part 100, the limiting part 200, and the tension generating part 300. This ensures that when a preset external force value is reached, further tension transmission can be promptly prevented, effectively protecting the target object and reducing potential damage risks. Applying the force protection component 1000 provided in this application embodiment to medical devices can significantly improve the safety and reliability of medical devices during high-risk operations, helping to reduce the occurrence of medical accidents.

[0065] Please refer to Figure 2, which is an example diagram of the first structure of the force protection member provided in the embodiment of this application; in the force protection member 1000 provided in the embodiment of this application, the limiting part 200 includes a central limiting member 210.

[0066] The center limiting member 210 extends from the first end 200a of the limiting portion toward the tension generating portion 300 in the first direction X. The second end 210b of the center limiting member is fixedly connected to the tension generating portion 300.

[0067] The center limiting member 210 is configured to drive the limiting member 200 to move in the first direction X when the tension generating unit 300 receives an external force that does not reach the preset external force value, so that the limiting member 200 drives the power transmission unit 100 to move in the first direction X; and is configured to prevent the protected object from being subjected to tension when the preset external force value is reached.

[0068] The central limiting member 210 extends from the first end 200a of the limiting part to the second end of the force generating part 300 in the first direction X, and is fixedly connected to the force generating part 300. This allows the central limiting member 210 to effectively transmit the force from the force generating part 300, and to stop transmitting the force when a preset external force value is reached. In other words, the main function of the central limiting member 210 in this embodiment is to respond to the external force received by the force generating part 300. When the external force does not reach the preset external force value, the central limiting member 210 will cause the limiting part 200 to displace in the first direction X, thereby causing the force transmission part 100 to move in the same direction.

[0069] During this process, the force transmission unit 100 can continuously apply tension to the protected object until the external force reaches the set safety threshold. Once the external force received by the tension generating unit 300 reaches the preset external force value, the central limit member 210 will trigger the protection mechanism to limit the force transmission unit 100 from continuing to apply tension to the protected object, thereby effectively protecting the target object from being subjected to excessive tension.

[0070] As shown in Figure 2, the center limiting member 210 in the force protection member 1000 provided in this application embodiment can drive the limiting part 200 and the force transmission part 100 to move when the preset external force value is not reached. When the preset external force value is reached, it can react in a very short time and promptly limit the further transmission of tensile force, thereby quickly and effectively protecting the target object.

[0071] Please continue referring to Figure 2. In this embodiment, the limiting part 200 further includes a limiting cavity 220, and a limiting head 211 is provided at the first end 210a of the central limiting member. In Figure 2, the limiting head 211 is set as an irregular sphere, and the entire central limiting member 210 is in the shape of a dropper in the first direction X. The size of the tube body is smaller than the size of the tube head (the limiting head 211 in this embodiment).

[0072] The limiting cavity 220 is disposed within the limiting portion 200 along the first direction X, and is configured to constrain the movement direction and movement distance of the center limiting member 210 relative to the limiting portion 200.

[0073] The size of the limiting head 211 matches the size of the limiting cavity 220, and is configured to drive the limiting part 200 to move when the tension generating part 300 receives an external force that does not reach the preset external force value; and is configured to move in the limiting cavity 220 along the first direction X when the tension generating part 300 receives an external force that reaches the preset external force value.

[0074] Please continue to refer to Figure 2. The limiting cavity 220 has the same size in the first direction X; the limiting part 200 also includes a limiting accessory 230 with a limiting strip 231 and a limiting spring 232.

[0075] The limiting strip 231 is engaged with the limiting head 211 in the second direction, and the limiting spring 232 is sleeved on the limiting strip 231 in the second direction.

[0076] The limiting spring 232 is configured to generate compressive deformation when the tension generating unit 300 receives an external force that does not reach a preset external force value; and is configured to restore compressive deformation when the tension generating unit 300 receives an external force that reaches a preset external force value.

[0077] The limiting bar 231 is configured to generate friction with the limiting head 211 and generate a compressive force on the limiting spring 232 when the tension generating part 300 receives an external force that does not reach the preset external force value; and is configured to release the limiting head 211 and drive the limiting spring 232 to restore its compressed deformation when the tension generating part 300 receives an external force that reaches the preset external force value.

[0078] As shown in Figure 2, the surface of the limiting strip 231 that contacts the limiting head 211 is an inclined surface. When an external force is applied to the force generating part 300 in the positive X direction (the direction indicated by the arrow in the figure is the positive direction of the first direction, and the opposite direction is the negative direction of the first direction, which will not be elaborated further below), friction will be generated between the limiting strip 231 and the limiting head 211, thereby causing the entire limiting part 200 to displace in the positive X direction. If the external force received by the force generating part 300 continues to increase, when the force generating part 300 receives an external force that reaches a preset external force value, the limiting strip 231 releases the limiting head 211 and causes the limiting spring 232 to recover its compressed deformation; thereby ensuring the effective triggering of the protection mechanism, preventing the force transmission part 100 from continuing to apply tension, and protecting the target object from excessive external force.

[0079] During the reset process, an external force in the negative X direction is applied to the tension generating part 300, causing it to move in the negative direction and push the limiting part 200 back to its original position. During this process, the limiting part 200 moves stably under the constraint of the limiting cavity 220. Under the action of the external force, the central limiting member 210 displaces along the negative X direction until it contacts the limiting strip 231. At this time, the limiting head 211 is pressed against the limiting strip 231, causing the limiting spring 232 to be compressed until the limiting head 211 is pushed back to its initial position. The spring then returns to its initial state, completing the reset of the entire component and remaining in the initial position, ready to respond to new external forces.

[0080] Therefore, it can be seen that the force protection component 1000 provided in this application embodiment, through the limiting cavity 220, the limiting strip 231 and the limiting spring 232, the friction between the limiting strip 231 and the limiting head 211 and the compression deformation of the limiting spring 232 work together to ensure that the power transmission part 100 can be displaced along the first direction X when the preset external force value is not reached; and when the preset external force value is reached, the protection mechanism is quickly triggered, the limiting head 211 is released from the limitation of the limiting strip 231, and the external force is effectively prevented from continuing to be transmitted to the force transmission part 100.

[0081] Please refer to Figure 3. Figure 3 is a first example diagram of the second structure of the force protection member provided in the embodiment of this application. This application also provides another force protection member 1000. The structural schematic diagram of the force protection member 1000 is shown in Figure 3. The limiting cavity 220 includes a second sub-cavity 222 and a first sub-cavity 221. The central limiting member 210 also includes a central rod 212.

[0082] The length of the first sub-cavity 221 in the first direction X is greater than the length of the limiting head 211 in the first direction X. It should be noted that the length of the first sub-cavity 221 in the first direction X is related to the magnitude of the preset external force value to be controlled. The greater the length of the first sub-cavity 221 in the first direction X is greater than that of the limiting head 211, the longer the distance that the limiting head 211 can travel in the first sub-cavity 221; correspondingly, the greater the external force required to detach the limiting head 211 from the first sub-cavity 221, and the greater the tensile force on the stress transmission part 100.

[0083] The size of the first sub-cavity 221 is the same as that of the limiting head 211, the size of the second sub-cavity 222 is larger than that of the limiting head 211, and the size of the center rod 212 is smaller than that of the limiting head 211.

[0084] As shown in Figure 3, the size of the first sub-cavity 221 is the same as the size of the limiting head 211. The limiting head 211 can be just accommodated in the first sub-cavity 221. The inner wall of the first sub-cavity 221 can generate friction with the limiting head 211, causing the entire limiting part 200 to move. In some possible embodiments, the size of the limiting head 211 can be slightly larger than the size of the first sub-cavity 221, but it is necessary to ensure that the limiting head 211 can move within the first sub-cavity 221 when an external force is applied.

[0085] As shown in Figure 3, the second sub-cavity 222 is larger than the limiting head 211, providing space to accommodate the limiting head 211. When the tension generating unit 300 receives an external force reaching a preset external force value, the limiting head 211 moves into the second sub-cavity 222, preventing further force application from damaging the protected object. Furthermore, the central rod 212 in the central limiting member 210 is smaller than the limiting head 211, allowing the central rod 212 to displace within the limiting cavity 220 and engage with the limiting head 211.

[0086] The first sub-cavity 221 is configured to generate friction with the limiting head 211 when the tension generating part 300 receives an external force that does not reach the preset external force value, thereby causing the limiting part 200 to move; the second sub-cavity 222 is configured to accommodate the limiting head 211 when the tension generating part 300 receives an external force that reaches the preset external force value.

[0087] As shown in Figure 3, the force protection component 1000 provided in this application effectively controls the applied external force by dividing the limiting cavity 220 into a first sub-cavity 221 and a second sub-cavity 222. When the preset external force value is not reached, the limiting head 211 generates friction with the inner wall of the first sub-cavity 221, causing the limiting part 200 to displace; when the external force reaches the preset value, the limiting head 211 breaks free from the first sub-cavity 221 and enters the larger second sub-cavity 222, thereby avoiding further force on the protected object. This structure can ensure that the force transmission part 100 no longer transmits force to the protected object when the external force reaches the preset external force value, thereby avoiding the negative effects of excessive force.

[0088] Please refer to Figure 4, which is a second example diagram of the second structure of the force protection member provided in the embodiment of this application; the first sub-cavity 221 of the force protection member 1000 provided in the embodiment of this application is provided with an opening H.

[0089] The opening H is configured such that when the tension generating part 300 receives an external force that does not reach the preset external force value, the limiting head 211 is deformed by the compression of the limiting head 211, so as to realize the displacement of the limiting head 211 relative to the limiting part 200 along the first direction X.

[0090] In Figure 4, openings H are provided on two sides of the limiting portion 200 in the first direction X. In some embodiments, openings H can be provided in other ways, such as on two sides in the second direction Y perpendicular to the first direction X. The openings H proposed in this application embodiment are such that when the limiting head 211 is subjected to external force, the portion of the limiting portion 200 on which the limiting head 211 is provided can deform.

[0091] As shown in Figure 4, the first sub-cavity 221 of the force protection component 1000 provided in this embodiment of the application is provided with an opening H, thereby allowing the limiting head 211 to deform under the action of external force, realizing the adaptation and response to external force, and enhancing the flexibility and safety of the entire force protection component 1000. The opening H design may simplify the manufacturing and assembly process of the component, making the overall structure easier to produce and maintain, and extending its service life.

[0092] Please refer to Figure 5, which is a partial track schematic diagram of the force protection component provided in this application; the force protection component 1000 provided in this application embodiment also includes a guide rail 400 with a locking groove 410; the limiting part 200 also includes a locking element 240.

[0093] The locking slot 410 and the locking element are configured to restrict the limiting part 200 from moving autonomously in the guide rail 400 when the tension generating part 300 receives an external force that reaches a preset external force value.

[0094] In the above implementation process, the configuration of the locking groove 410 and the locking element 240 restricts the autonomous displacement of the limiting part 200 in the guide rail 400 when the tension generating part 300 receives and reaches the preset external force value. When the external force reaches the preset value, the limiting part 200 is effectively locked under critical external force conditions through the design of the locking groove 410, enhancing the stability of the entire structure. This prevents unnecessary movement caused by external force fluctuations and ensures the reliability of the system during operation.

[0095] As shown in Figure 5, the force protection component 1000 provided in this embodiment of the application is also provided with a guide rail 400 with a locking groove 410 and a locking element 240, which enhances the stability and safety of the force protection component 1000 under the applied force condition, and ensures that the autonomous displacement of the limiting part 200 can be effectively restricted when the preset external force value is reached, thereby further improving the reliability and applicability of the system.

[0096] Please refer to Figure 6, which is a first example diagram of the third structure of the force protection member provided in the embodiment of this application. The force protection member 1000 provided in the embodiment of this application also includes a slide 500, which is configured to accommodate the limiting part 200 and the tension generating part 300, and provides movement space for the limiting part 200 and the tension generating part 300 in the first direction X.

[0097] As shown in Figure 6, the entire force generating part 300 and the limiting part 200 are accommodated in the slide groove 500, and both the force generating part 300 and the limiting part 200 can be displaced in the slide groove 500 under the action of external force. As shown in Figure 6, the length of the slide groove 500 in the first positive X direction is the maximum displacement that the force generating part 300 can move in the first positive X direction.

[0098] Please refer to Figure 7 based on Figure 6. Figure 7 is a schematic diagram showing the disassembled sleeve rod, limiting rod and limiting member provided in the embodiment of this application. The force generating part 300 of the force protection member 1000 provided in the embodiment of this application includes a sleeve rod 310 with a limiting groove 311, and the limiting part 200 includes a limiting rod 250 and a limiting member 260.

[0099] The sleeve rod 310 is sleeved outside the limiting rod 250, and the limiting member 260 is set on the limiting rod 250 and passes through the sleeve rod 310 from the limiting groove 311.

[0100] The limiting member 260 is configured to displace in the limiting groove 311 when the tension generating part 300 receives an external force that does not reach the preset external force value; and is configured to disengage from the limiting groove 311 when the tension generating part 300 receives an external force that reaches the preset external force value.

[0101] In other words, when the external force does not reach the preset value, the limiting member 260 moves in the limiting groove 311, allowing relative displacement between the limiting rod 250 and the sleeve rod 310 (in this case, the limiting rod 250 is displaced by the sleeve rod 310); when the external force reaches the preset value, the limiting member 260 will disengage from the limiting groove 311, and both the limiting member 260 and the limiting rod 250 will be accommodated inside the sleeve rod 310; since the size of the sleeve rod 310 is larger than the total size of the limiting rod 250 and the limiting member 260, neither the limiting rod 250 nor the limiting member 260 will displace, ensuring that the protected object is no longer subjected to external force.

[0102] As shown in Figures 6 and 7, the movement and disengagement mechanism of the limiting member 260 within the limiting groove 311 enables precise control of the external force applied to the target object, ensuring that it does not exceed the preset external force value, thereby effectively protecting the object from damage. Simultaneously, the flexible movement of the limiting member 260 allows the force protection component 1000 to quickly respond to changes in external force, enhancing operational safety. In practical applications, the component parameters can be adjusted to adjust the corresponding preset external force value according to requirements, making the structure more adaptable.

[0103] In some embodiments, the limiting member 260 can be installed on the limiting rod 250 by a positioning member. As shown in Figures 6 and 7, the limiting member 260 is a spring piece that can achieve locking, and is installed on the limiting rod 250 through two positioning holes.

[0104] In some embodiments, please refer to FIG8, which is another exploded schematic diagram of the limiting rod and limiting member provided in the embodiments of this application. The limiting member 260 may be a mechanical buckle itself provided on the limiting rod 250. The mechanical buckle can also be displaced in the limiting groove 311 on the sleeve rod 310.

[0105] Therefore, the force protection component 1000 provided in this application embodiment offers multiple ways to set the limiting member 260, enabling the force protection component 1000 to meet different application scenarios and needs. The spring-loaded limiting member 260 installed through the positioning member can be quickly disassembled and adjusted, facilitating maintenance and replacement; while the mechanical buckle set on the limiting rod 250 simplifies the component structure, reduces additional installation steps, and maintains stability and reliability. The diversified design allows the limiting member 260 to work effectively under different conditions, enhancing the performance of the entire protection mechanism, improving user operation convenience, and enhancing the overall safety of the force protection component 1000.

[0106] In some embodiments, a pulley shaft can be provided on the sleeve 310, which can realize both pushing and pulling of the sleeve 310 in the first direction X, and also realize rotation of the sleeve 310. Assuming that the force protection object is the basket end of the ablation device, the direction of the basket head end can be adjusted.

[0107] Therefore, the pulley shaft on the sleeve 310 not only allows the sleeve 310 to be pushed and pulled in the first direction X, but also supports its rotational movement. This enhances the controllability of the operation, enabling doctors to more easily adjust the instrument position and optimize the treatment effect during interventional surgery.

[0108] Please refer to Figure 6. The limiting part 200 and the tension generating part 300 are provided with a damper S, which is configured to provide an initial damping force.

[0109] In Figure 6, the damper S provided in the limiting part 200 and the tension generating part 300 is a rubber sheet. In practical applications, other elements that can provide initial damping can also be used as the damper S in the embodiments of this application.

[0110] Taking intravascular ablation as an example, the design process of the preset tension value is briefly explained. A tension is applied to the tension generating part 300 until the basket and electrode are in close contact with the blood vessel wall. Assuming that the set value of the wall-adhering force is 2N, the force protection component 1000 of the handle is subjected to the same 2N reaction force. Similarly, assuming that the damper S in the force protection component provides a 2N damping force, and the 3N friction force accumulated between the limiting groove 311 and the limiting member 260 (assumed to be the critical separation force value) also causes the handle control part to be subjected to the same reaction force. At this time, the total reaction force is 7N. Moving the tension generating part 300 of the force protection component 1000 proximally will cause the limiting member 260 to disengage from the limiting groove 311. The limiting rod 250 and the limiting member 260 remain in their original positions due to the damping effect, while the sleeve 310 enters the neutral state, achieving the purpose of force protection.

[0111] In practical applications, the magnitude of the preset external force can be changed by adjusting multiple parameters. First, selecting dampers S (such as rubber sheets) of different materials or thicknesses can alter the damping force, thereby affecting the overall reaction force. Second, adjusting the contact surface material, surface treatment, or contact area between the limiting groove 311 and the limiting member 260 will change the frictional force and affect the release force. Furthermore, changing the shape, size, or elastic properties of the limiting member 260 can adjust its response when a force is applied.

[0112] Therefore, the force protection component 1000 in this embodiment can effectively achieve precise control of the preset external force value by setting the damper S and adjusting relevant parameters. In the design process using intravascular ablation as an example, by applying tension to make the basket and electrode adhere tightly to the blood vessel wall, the force protection component 1000 can promptly identify and respond to the applied external force under the combined action of reaction force and friction. When the set critical release force value is reached, it automatically protects the target object, avoiding further damage. By optimizing the damper S material, adjusting the friction force and the characteristics of the limiting component 260, the preset external force value can be flexibly adjusted, thereby improving the safety and reliability of the force protection component 1000 and ensuring effective prevention of damage to sensitive tissues in practical applications.

[0113] Please refer to Figure 9, which is an example diagram of the fourth structure of the force protection member provided in the embodiment of this application. In the structure of the fourth force protection member 1000 provided in the embodiment of this application, the limiting part 200 includes a track gear 270, and the tension generating part 300 includes a knob 320 and a rotating gear 330.

[0114] The knob 320 is connected to the rotating gear 330 and configured to drive the rotating gear 330 to rotate when the knob 320 receives external force. The knob 320 provided in this embodiment allows a doctor or operator to conveniently adjust the settings when external force is applied. When external force is applied, the knob 320 drives the connected rotating gear 330 to rotate.

[0115] The rotating gear 330 meshes with the track gear 270 and is configured to drive the track gear 270 to move in the first direction X when the rotating gear 330 rotates. This ensures that the force can be smoothly transmitted to the target object even if a preset external force value is not reached.

[0116] The track gear 270 is configured to drive the power transmission unit 100 to move in the first direction X when the tension generating unit 300 receives an external force that does not reach the preset external force value.

[0117] The rotating gear 330 and the track gear 270 are also configured to slip when the tension generating part 300 receives an external force that reaches a preset external force value.

[0118] It should be noted that slippage refers to the situation where meshing gears lose their meshing when the applied external force exceeds a certain threshold. In this embodiment, the slippage force between the track gear 270 and the rotating gear 330 is used to prevent excessive force from being transmitted to the force transmission part 100.

[0119] In practical applications, the sliding force can be set by adjusting the gear material, tooth profile design, and the coefficient of friction of the contact surfaces. For example, choosing materials with different hardness or changing the number and angle of the gears can alter the contact force between the gears, thereby affecting the magnitude of the sliding force.

[0120] As shown in Figure 9, the combination of the track gear 270 and the rotating gear 330 enables precise power transmission. The gear meshing effectively amplifies the force applied to the knob 320, thereby improving the overall operational sensitivity and response speed. On the other hand, the use of the slippage mechanism effectively prevents excessive force when the preset external force value is reached.

[0121] Please continue to refer to Figure 9. The fourth force protection component 1000 provided in this application embodiment also includes a reset part 600 having a reset button 610, a reset spring 620, a connecting rod 630 and a reset pressure block 640.

[0122] The reset button 610 is connected to the reset pressure block 640 via the connecting rod 630. The reset spring 620 is sleeved on the connecting rod 630. The surface of the reset pressure block 640 near the track gear 270 is set as an inclined surface facing the track gear 270.

[0123] The reset button 610 is configured to control the displacement of the reset block 640 in the second direction when the reset button 610 receives an external force; the reset spring 620 is configured to restore the reset block 640 to its initial position in the second direction when the external force received by the reset button 610 is removed; the reset block 640 is configured to contact the track gear 270 and press the track gear 270 to move along the first direction X.

[0124] In the fourth force protection component 1000 provided in this application embodiment, the reset part 600 consists of a reset button 610, a reset spring 620, a connecting rod 630, and a reset block 640. As shown in FIG9, the reset button 610 and the reset block 640 are connected by the connecting rod 630, the reset spring 620 is sleeved on the connecting rod 630, and the side of the reset block 640 facing the track gear 270 is designed with an inclined surface, so that the reset block 640 can move downward under the application of external force and contact the track gear 270, pushing it to move along the first direction X.

[0125] When the reset button 610 receives external force (such as pressure from an operator), the connecting rod 630 transmits this force to the reset block 640, causing it to move downwards. The inclined surface of the reset block 640 contacts the track gear 270, generating a compressive force that pushes the track gear 270 to move along the negative X direction. Once the external force on the reset button 610 is removed, the reset spring 620 begins to resume its function, pushing the reset block 640 back to its initial position, thereby also returning the track gear 270 to its initial state under the push of the reset block 640.

[0126] Therefore, by setting the reset part 600, the force protection component 1000 can be effectively reset quickly after reaching the preset external force value, ensuring that the force protection component 1000 can respond to new external force input at any time during use. The setting of the reset part 600 improves the ease of operation of the force protection component 1000.

[0127] Please refer to Figure 10, which is an example diagram of the fifth structure of the force protection member provided in the embodiment of this application; the limiting part 200 of the fifth force protection member 1000 provided in the embodiment of this application includes a permanent magnet 280 and a coil 290, and the tension generating part 300 includes a current generating switch 700 in the same direction and a current generating switch 800 in the opposite direction.

[0128] Coil 290 is wound around permanent magnet 280, and current generating switch 700 and current generating switch 800 are respectively connected to coil 290.

[0129] The coil 290 and the permanent magnet 280 are configured to generate a repulsive force when the same-direction current generating switch 700 is closed, so as to drive the limiting part 200 to move in the positive direction of the first direction X; and are configured to generate an attractive force when the reverse current generating switch 800 is closed, so as to drive the limiting part 200 to move in the negative direction of the first direction X.

[0130] In this embodiment, the fifth force protection component 1000 combines a permanent magnet 280 and a coil 290, and achieves movement of the limiting part 200 through current control. Its movement principle utilizes changes in current to control the polarity of the magnetic field, thereby achieving precise control of the limiting part 200.

[0131] Specifically, coil 290 is wound around permanent magnet 280, forming an electromagnetic system. When the same-direction current generating switch 700 is closed, current flows through coil 290 to generate a magnetic field, which interacts with the magnetic field of permanent magnet 280, producing a repulsive force and driving the limiting part 200 to move in the positive direction of the first direction X. Conversely, when the reverse current generating switch 800 is closed, the magnetic field generated by coil 290 is in the opposite direction to the magnetic field of permanent magnet 280, forming an attractive force and causing the limiting part 200 to move in the negative direction of the first direction X.

[0132] As shown in Figure 10, the force protection component 1000 provided in this embodiment of the application also achieves precise adjustment of the limiting part 200 through a magnetic field controlled by current. Compared with traditional mechanical devices, electromagnetic control not only improves the response speed but also reduces mechanical wear and extends equipment life. In addition, the adjustment of current makes the entire force protection component 1000 more adaptable, allowing for rapid adjustment of the protection force value according to actual needs, thereby improving overall safety and reliability.

[0133] Please refer to Figure 11, which is a schematic diagram of the structure of the ablation catheter provided in the embodiment of this application; this application provides an ablation catheter, which is provided with the above-mentioned force protection member 1000.

[0134] The ablation catheter provided in this application embodiment includes a force protection component 1000, a control lever, a housing, a PCB board, a tail wire, a tail tube, and a Luer connector.

[0135] As shown in Figure 11, the catheter is connected to the proximal end of the basket, and the control lever is fixed to the distal end of the basket. By pulling the control lever relative to the catheter, the basket can be expanded and contracted. The catheter extends into the latch seat through a stress diffuser tube, forming a sealed space with the latch cover to prevent blood leakage. The control lever is a hollow catheter, connected to the tail tube via the stress diffuser tube, latch seat, latch cover, and force protection component 1000. The tail tube connects to a Luer connector, thus the lumen of the control lever is open to the outside. The guiding guidewire, mapping catheter, and saline solution can reach the ablation area through this cavity.

[0136] As shown in Figure 11, when the force protection component 1000 provided in this embodiment is installed on the ablation handle, the basket at the distal end of the handle can expand when the functional component on the handle is retracted. When the basket is fully attached to the blood vessel wall, due to the presence of the force protection component 1000, the tension generating part 300 will not be able to continue to expand the basket, thereby reducing or even avoiding the expansion damage of the basket to the blood vessel.

[0137] In summary, the various force protection components 1000 provided in this application achieve effective protection and precise control of the protected object through multiple structural designs and diverse working principles. Each component utilizes different mechanical and electromagnetic principles, such as friction, damping force, slippage mechanism, and magnetic repulsion and attraction, to ensure that the system can react quickly and limit the force applied to the protected object when the external force exceeds a preset value. The preset external force value can be flexibly adjusted by modifying parameters such as dampers, friction materials, and structural dimensions. In general, the force protection component 1000 provided in this application can stop further force transmission when the applied external force exceeds a safety threshold, thereby effectively preventing tissue damage.

[0138] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A force protection component, characterized in that, The force protection component includes: a force transmission part, a limiting part, and a tension generating part; The force transmission part is fixedly connected to the limiting part, and the limiting part contacts the tension generating part; The force transmission part is configured to transmit tensile force to the protected object and transmit the reaction force of the tensile force to the limiting part; the limiting part is configured to restrict the displacement of the force transmission part so that the protected object is no longer subjected to the tensile force when a preset external force value is reached; the tensile force generating part is configured to receive the external force and drive the limiting part to generate displacement, so that the limiting part drives the force transmission part to generate displacement.

2. The force protection component according to claim 1, characterized in that, The limiting part includes a central limiting component; The central limiting member extends from the first end of the limiting portion toward the tensile generating portion in a first direction; The second end of the central limiting member is fixedly connected to the tension generating part; The central limiting member is configured to, when the tension generating part receives an external force that does not reach the preset external force value, drive the limiting part to move in the first direction, so that the limiting part drives the force transmitting part to move in the first direction; and is configured to, when the preset external force value is reached, prevent the protected object from being subjected to the tension.

3. The force protection component according to claim 2, characterized in that, The limiting part further includes a limiting cavity; the first end of the central limiting member is provided with a limiting head; The limiting cavity is disposed within the limiting portion along the first direction and is configured to constrain the movement direction and movement distance of the central limiting member relative to the limiting portion; The size of the limiting head matches the size of the limiting cavity, and is configured to drive the limiting part to move when the tension generating part receives an external force that does not reach the preset external force value; and is configured to move in the limiting cavity along the first direction when the tension generating part receives an external force that reaches the preset external force value.

4. The force protection component according to claim 3, characterized in that, The limiting cavity has the same size in the first direction; the limiting part also includes a limiting accessory with a limiting strip and a limiting spring; The limiting strip engages with the limiting head in the second direction; The limiting spring is sleeved on the limiting strip in the second direction; The limiting spring is configured to generate compressive deformation when the tension generating part receives an external force that does not reach the preset external force value; And configured to restore the compressive deformation when the tension generating part receives the preset external force value; The limiting strip is configured to generate friction with the limiting head and compress the limiting spring when the tension generating part receives an external force that does not reach the preset external force value. And configured to release the limiting head and drive the limiting spring to restore the compression deformation when the tension generating part receives an external force reaching the preset external force value.

5. The force protection component according to claim 3, characterized in that, The limiting cavity includes a first sub-cavity and a second sub-cavity; the central limiting member also includes a central rod; The length of the first sub-cavity in the first direction is greater than the length of the limiting head in the first direction; The size of the first sub-cavity is the same as the size of the limiting head, the size of the second sub-cavity is larger than the size of the limiting head, and the size of the central rod is smaller than the size of the limiting head. The first sub-cavity is configured to generate friction with the limiting head when the tension generating part receives an external force that does not reach the preset external force value, thereby causing the limiting part to move. The second sub-cavity is configured to accommodate the limiting head when the tension generating part receives an external force reaching the preset external force value.

6. The force protection component according to claim 5, characterized in that, The first sub-cavity is provided with an opening; The opening is configured such that when the tension generating part receives an external force that does not reach the preset external force value, it deforms based on the compression of the limiting head, thereby achieving displacement of the limiting head relative to the limiting part along the first direction.

7. The force protection member according to any one of claims 2-5, characterized in that, The force protection component also includes a guide rail with a locking groove; the limiting part also includes a locking element; The locking groove and the locking element are configured to restrict the limiting part from autonomously displacing in the guide rail when the tension generating part receives an external force reaching the preset external force value.

8. The force protection component according to claim 1, characterized in that, The force protection component also includes a sliding groove; The slide is configured to accommodate the limiting part and the tension generating part, and to provide the limiting part and the tension generating part with movement space in a first direction.

9. The force protection component according to claim 8, characterized in that, The tension generating part includes a sleeve rod with a limiting groove; the limiting part includes a limiting rod and a limiting member; The sleeve is fitted over the limiting rod; The limiting member is disposed on the limiting rod and extends out of the sleeve rod from the limiting groove; The limiting member is configured to displace in the limiting groove when the tension generating part receives an external force that does not reach the preset external force value; and is configured to disengage from the limiting groove when the tension generating part receives an external force that reaches the preset external force value.

10. The force protection component according to claim 8, characterized in that, The limiting part and the tension generating part are provided with dampers, which are configured to provide initial damping force.

11. The force protection component according to claim 1, characterized in that, The limiting part includes a track gear; the tension generating part includes a knob and a rotating gear; The knob is connected to the rotating gear and is configured to drive the rotating gear to rotate when the knob receives an external force; The rotating gear meshes with the track gear and is configured to drive the track gear to move in a first direction when the rotating gear rotates; The track gear is configured to drive the force transmission part to displace in the first direction when the tension generating part receives an external force that does not reach the preset external force value. The rotating gear and the track gear are further configured to slip when the tension generating part receives an external force reaching the preset external force value.

12. The force protection component according to claim 11, characterized in that, The force protection component also includes a reset part having a reset button, a reset spring, a connecting rod, and a reset pressure block; The reset button is connected to the reset pressure block via the connecting rod; The return spring is sleeved on the connecting rod; The surface of the reset block near the track gear is configured as an inclined surface facing the track gear; The reset button is configured to control the displacement of the reset block in the second direction when the reset button receives an external force; The reset spring is configured to restore the reset block to its initial position in the second direction when the external force received by the reset button is removed; The reset block is configured to contact the track gear and compress the track gear to displace along the first direction.

13. The force protection component according to claim 1, characterized in that, The limiting part includes a permanent magnet and a coil; the tension generating part includes a current generating switch in the same direction and a current generating switch in the opposite direction. The coil is wound around the permanent magnet; The same-direction current generating switch and the reverse-direction current generating switch are respectively connected to the coil; The coil and the permanent magnet are configured to generate a repulsive force when the same current generating switch is closed, so as to drive the limiting part to move in the positive direction of the first direction; And configured to generate an attractive force when the reverse current generating switch is closed, so as to drive the limiting part to move in the negative direction of the first direction.

14. An ablation handle, characterized in that, The ablation handle includes a force protection member as described in any one of claims 1-13.

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