Variable magnetic damping system for fishing reel

Abstract

This invention relates to a variable magnetic damping system for a fishing reel, comprising a swing arm, a support component for supporting the swing arm, at least two first magnets with opposite polarities, and an adjusting component for adjusting the magnitude of magnetic damping. At least one first magnet is mounted on the swing arm, and the tip of the swing arm is rotatably supported on the support component, allowing the swing arm to move closer to or away from the reel shaft. The adjusting component comprises a rotating component that can rotate relative to the support component and a second magnet mounted on the rotating component that engages with the first magnet. The second magnet moves closer to or away from the corresponding first magnet on the swing arm as the rotating component rotates. Different magnetic damping effects are achieved by the attraction or repulsion force exerted by the second magnet on the first magnet at a corresponding position on the swing arm. The overall structure is simple, easy to adjust, has multiple braking positions, and the swing arm does not require spring return, making it easier to manufacture.

Description

Technical Field

[0001] This invention relates to the technical field of fishing reels, specifically to a variable magnetic damping system for fishing reels. Background Technology

[0002] During the flight or entry of the bait into the water, changes in external conditions such as wind direction or sudden gusts can alter the bait's flight speed. Meanwhile, the reel continues to rotate due to inertia, causing a large amount of slack line to fail to be pulled out of the reel, resulting in knots in the fishing line.

[0003] To prevent line breakage (also known as line bursting), current fishing reels are usually equipped with a braking device. This braking device generally uses centrifugal friction damping, magnetic damping, or other structures. For example, Chinese Patent Publication No. CN107410236B discloses a double-bearing reel with a magnetic damping braking device. This double-bearing reel has a reel body, a spool, a spool (also known as a line reel), and a braking device. The spool is rotatably supported on the reel body. The spool has a winding body, a shaft mounting part, and a connecting wall part. The winding body has a space inside. The shaft mounting part is cylindrical and allows the spool shaft to pass through. The connecting wall part connects the winding body and the shaft mounting part. The braking device is located in the space of the winding body. The braking device has at least one magnet arranged opposite to the connecting wall part. The spool is braked by the magnetic force of the magnet relative to the connecting wall part. Specifically, the braking device includes a magnet mounting component for mounting a magnet. The magnet mounting component is formed as an arc extending in the circumferential direction and having a first end and a second end. The second end is movable between a first position and a second position on the outer periphery side of the first position. The braking device also has a support component and a force-applying component. The support component rotatably supports the first end of the aforementioned magnet mounting component, and the force-applying component applies force to the second end of the magnet mounting component toward the first position side.

[0004] To meet user needs, the aforementioned braking device also includes an adjustment component, which adjusts the braking force by moving the support component axially. Specifically, rotating the adjustment component engages with a helical groove formed on the outer circumference of its cylindrical portion and a protrusion on the support component's locking portion, thereby driving the support component, its magnet mounting component, and the magnet to move axially. This changes the axial distance between the magnet and the connecting wall of the drum, ultimately adjusting the magnitude of the magnetic damping force.

[0005] However, the aforementioned literature only allows for fine adjustment of the magnetic damping force. Due to limitations in axial space, the adjustment range of the magnetic damping force is relatively small. Therefore, the applicant has designed a fishing reel with both coarse and fine adjustment structures, such as the "Magnetic Damping Structure of a Fishing Reel" in Chinese Patent No. CN201820232874.X. By axially pressing the damping disc and rotating it at an angle before releasing, the damping disc returns to its original position under the action of a first spring, causing the pin to fall into a deeper or shallower groove. This changes the distance between the damping disc and the magnetic block. In other words, by appropriately selecting the depth difference of each groove, the coarse adjustment of the damping force can be achieved. However, the addition of the damping disc increases the size and weight of the reel, thus requiring a greater magnetic damping force during braking. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a variable magnetic damping system for fishing reels with a more reasonable structure and the ability to easily adjust the magnitude of the magnetic damping force, in light of the current state of the technology.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a variable magnetic damping system for a fishing reel, installed on one side of the reel, the variable magnetic damping system includes a swing arm, a support component for supporting the swing arm, at least two first magnets with opposite polarities, and an adjustment component for adjusting the magnitude of magnetic damping, wherein at least one of the first magnets is installed on the swing arm, and the head end of the swing arm is rotatably supported on the support component so that the swing arm can approach or move away from the reel shaft, characterized in that: the adjustment component includes a rotating component that can rotate relative to the support component and a second magnet installed on the rotating component that can cooperate with the first magnet, the second magnet can approach or move away from the corresponding first magnet on the swing arm as the rotating component rotates, so that the swing arm swings outward or inward.

[0008] In the above scheme, in order to obtain more magnetic damping force levels, the first magnet on the swing arm has at least two spaced-apart first magnets, and the polarities of adjacent first magnets are set opposite.

[0009] Furthermore, when the number of first magnets on the swing arm is odd, an auxiliary magnet is also installed on the support component adjacent to the first or second end of the swing arm. The auxiliary magnet has the opposite polarity to its adjacent first magnet. In this way, as many magnet groups as possible can be obtained in a limited space to better meet the usage requirements.

[0010] To ensure even force distribution on the reel during braking, multiple swing arms are preferably arranged sequentially and circumferentially on the support component, with the number of second magnets matching the number of swing arms.

[0011] A further improvement to the above solutions is that the rotating component has a radial hole on its circumference. Within this radial hole, a positioning post with its head exposed is constrained, and a spring abuts against the positioning post, ensuring the head of the positioning post always tends to be exposed. Positioning slots, corresponding to the number of first magnets on the swing arm, are spaced circumferentially on the inner wall of the supporting component. When the second magnet aligns with the first magnet on the swing arm, the positioning post sequentially falls into the corresponding positioning slot as the rotating component rotates. Thus, the impact sound emitted when the positioning post falls into the corresponding positioning slot serves as a notification to the user that the desired gear has been reached, improving the user experience.

[0012] In the above-mentioned improved scheme, preferably, the support component includes a support seat and a fixing ring, wherein the support seat includes a seat body, a first cylinder that extends axially toward the spool side along the spool shaft and is disposed on one end face of the seat body, and a second cylinder that also extends axially along the spool shaft and penetrates the first cylinder and is disposed on the other end face of the seat body. The fixing ring is fixed to the top surface of the extended end of the first cylinder, the rotating component is sleeved on the second cylinder, and the swing arm is located on the outer periphery of the first cylinder. This structure is beneficial for installing the swing arm and the rotating component and ensures that the two are coaxially distributed.

[0013] To prevent the rotating component from rotating excessively, it is preferable that an arc-shaped elongated hole and a limiting pin that can be inserted into the arc-shaped elongated hole and slide relative to the arc-shaped elongated hole as the rotating component rotates are provided between the rotating component and the base.

[0014] Meanwhile, a gear indicator showing the magnitude of magnetic damping can be provided at the edge of the arc-shaped elongated hole, allowing the user to intuitively know the current gear.

[0015] To facilitate the application of force to the rotating component, it is preferable that the rotating component is also provided with a protrusion for easy application of force, and the base has an arc-shaped operating hole, with the protrusion exposed in the arc-shaped operating hole.

[0016] More practically, a limiting arm corresponding to the number of swing arms extends circumferentially from the outer circumferential surface of the first cylinder. A limiting groove is formed between the limiting arm and the outer circumferential surface of the first cylinder for the tail end of the corresponding swing arm to extend into, so as to limit the swing amplitude of the swing arm.

[0017] Furthermore, the swing arm is composed of an upper arm body and a lower arm body, and a magnetic shielding sheet is provided in the upper and lower arm bodies. The first magnet is embedded on the outer surface of the swing arm outside the magnetic shielding sheet. By using the magnetic shielding sheet, the magnetic lines of force are directed as far as possible toward the deflector, ensuring the magnetic damping effect.

[0018] Compared with the prior art, since the adjustment component of the present invention adopts a rotating component with a second magnet, only one rotation action is needed during adjustment to drive the second magnet to rotate, and to generate an attractive or repulsive force on the first magnet at the corresponding position on the swing arm. At the same time, by utilizing the different distances (i.e., lever arms) from each first magnet to the pin shaft, the force at each first magnet has different magnetic damping effects, thereby obtaining different magnetic damping levels for the user to choose from. Moreover, this adjustment method has a simple structure, is easy to adjust, has multiple braking levels, and the swing arm does not need to rely on spring reset, making it more convenient to manufacture and lower in cost. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of an embodiment of the present invention mounted on a fishing reel;

[0020] Figure 2 for Figure 1 A three-dimensional diagram showing the reel and side cover separated after the main body of the fishing reel is removed (first gear);

[0021] Figure 3 for Figure 2 A three-dimensional schematic diagram showing the retaining ring after the spool is removed and the retaining ring is separated from the base.

[0022] Figure 4 for Figure 3 Further three-dimensional decomposition diagram;

[0023] Figure 5 for Figure 4 A further three-dimensional decomposition diagram;

[0024] Figure 6 for Figure 5 Another perspective three-dimensional decomposition diagram;

[0025] Figure 7 for Figure 2 A three-dimensional diagram showing the second gear (second gear, maximum magnetic damping force) after the spool is removed and the protrusion is rotated clockwise by an angle.

[0026] Figure 8 for Figure 7 A three-dimensional diagram showing the convex protrusion rotating clockwise by one angle after being pushed further (third gear, with the magnetic damping force at the middle value);

[0027] Figure 9 for Figure 1 A cross-sectional view of the support and rotating components when the rotary knob is used for fine adjustment, with the knob raised to its highest position axially. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] like Figures 1 to 9 As shown, the variable magnetic damping system in this embodiment is installed on a fishing reel. The fishing reel includes a main body 10, a reel 20, and a side cover 30. The reel 20 is mounted on a reel shaft 40. Like existing technologies, the reel 20 has a winding body 201, a shaft mounting part 202, and a connecting wall part 203. The winding body 201 has an internal space, and the shaft mounting part 202 is designed as a cylindrical body for the reel shaft 40 to pass through. The connecting wall part 203 connects the winding body 201 and the shaft mounting part 202. Both ends of the reel shaft 40 are supported on the main body 10 and the side cover 30 by a first bearing A1 and a second bearing A2, allowing the reel 20 to rotate with the reel shaft 40. Since these are all existing technologies, they will not be described in detail here.

[0030] The aforementioned variable magnetic damping system is installed on one side of the fishing reel 20. In the figure, it is constrained on the side cover 30 of the fishing reel and can partially extend into the space of the winding body 201 of the fishing reel 20. The variable magnetic damping system includes a swing arm 1, a support component 2, a first magnet 3, and an adjustment component 4 that can adjust the magnitude of the magnetic damping. The support component 2 is constrained on the side cover 30 and is used to support the swing arm 1. In order to facilitate the installation of the swing arm 1, the support component 2 preferably adopts the following structure: it includes a support base 21 and a fixing ring 22. The support base 21 includes a seat body 211, a first cylinder 212 that extends axially along the reel shaft towards the connecting wall 203 side and is provided on one end face of the seat body 211, and a second cylinder 213 that also extends axially along the reel shaft and penetrates the first cylinder and is provided on the other end face of the seat body 211. The fixing ring 22 is fixed to the top surface of the extended end of the first cylinder 212 by bolts. The number of swing arms 1 can be one or more; the figure shows two, which are sequentially supported circumferentially on the support member 2, one end facing the other. Specifically, in conjunction with the structure of the support member 2, each swing arm 1 is located outside the first cylinder 212 and extends circumferentially along the outer circumferential surface of the first cylinder 212. The head end of each swing arm 1 is supported on the fixing ring 22 and the seat 211 by a pin 5. That is, similar to the prior art, the tail end of each swing arm 1 can swing between a first position and a second position, which is further outward from the first position, allowing each swing arm 1 to move closer to or away from the first cylinder. In other words, it allows the swing arm to move closer to or away from the reel shaft 40.

[0031] In the aforementioned variable magnetic damping system, there are at least two first magnets 3, with at least one first magnet required to be mounted on the swing arm 1, or all of the first magnets 3 can be mounted on the swing arm 1. In the figure, considering installation space, three first magnets 3 are mounted on each swing arm 1. A fourth first magnet (which, for ease of identification, can also be referred to as auxiliary magnet 3a; see [reference]) is also provided. Figure 2The first magnet is placed on the side of the first cylinder 212 so that it is adjacent to the first magnet at the beginning (or end) of the swing arm. The polarities of the four first magnets are opposite, that is, on the inner wall of the winding body 201 facing the spool, the polarities of the four first magnets are arranged in the form of N, S, N, S or S, N, S, N, so that they form a pair of magnetic couplings.

[0032] To ensure the magnetic damping effect, a magnetic shielding sheet 1c is pre-installed inside the swing arm 1 to ensure that the magnetic lines of force generated by each set of first magnets on the outside act on the reel 20 as much as possible. To facilitate the installation of the magnetic shielding sheet 1c, the swing arm is assembled from an upper arm body 1a and a lower arm body 1b, and the three first magnets 3 are embedded circumferentially on the outer surface of the swing arm 1 outside the magnetic shielding sheet 1c.

[0033] Similar to existing technology, a limiting arm 214 corresponding to the number of swing arms 1 extends circumferentially on the outer peripheral surface of the first cylinder 212. A limiting groove 215 is formed between the limiting arm 214 and the outer peripheral surface of the first cylinder 212 for the tail end of the corresponding swing arm to extend into, so as to limit the swing amplitude of the swing arm 1.

[0034] In use, as with existing technology, when the reel 20 rotates to unload the wire, it cuts the magnetic wires generated by each set of first magnets 3 and generates an induced current. This attracts each swing arm 1 to swing outward around the pin 5 (the attraction at this time is called the first force). For the reel, the magnetic lines of force are denser at this time, resulting in a greater magnetic damping force. The higher the rotational speed of the reel 20, the greater the induced current on it, and the greater the attraction of the generated magnetic field to the first magnets 3. As a result, the swing arms 1 will move closer to the inner wall of the winding body 201, and the magnetic damping force will be even greater.

[0035] In order to quickly adjust the magnitude of the magnetic damping force and obtain different magnetic damping levels during use, this embodiment improves the adjustment component 4. The adjustment component 4 includes a rotating component 41 that can rotate relative to the support component 2 and a second magnet 42 that can cooperate with the first magnet 3 mounted on the rotating component 41. The second magnet 42 can approach or move away from each of the first magnets 3 on the swing arm as the rotating component 41 rotates. Thus, by relying on the magnetic force of the second magnet 42, an attractive or repulsive force is generated on the corresponding first magnet 3 on the swing arm 1 (the attractive or repulsive force at this time is called the second force). Since the swing arm 1 is hinged to the support component 2, the swing arm 1 swings outward or inward, that is, the swing arm 1 performs an opening or closing movement. Utilizing the lever principle, the torque generated by the second force acting on the first magnet at the beginning of the swing arm or the torque generated by the first magnet at the end of the swing arm is different. Therefore, for the three first magnets 3 on the swing arm 1, there are three different forms of magnetic swing arm states, thereby giving the first magnets 3 on the swing arm three different magnetic damping effects on the rotational speed of the reel 20. The user can achieve the desired braking effect by selecting the desired state.

[0036] Specifically, in the figure, the rotating component 41 is a plate-like body with a through hole. The rotating component 41 is fitted onto the second cylinder 213 of the support component 2 through the through hole, allowing the rotating component 41 to rotate smoothly relative to the support component 2 around the second cylinder 213. Corresponding to the two swing arms 1, two second magnets 42 are also provided. Furthermore, to allow the user to clearly and intuitively know the current gear position during adjustment, a gear indicator indicating the magnitude of the magnetic damping force is provided between the rotating component 41 and the support component 2. Alternatively, it can be... Figure 4 , 5 The structure in section 6 involves a spring post mounted on the side of the rotating component 41. Specifically, a radial hole 411 is opened on the side of the rotating component 41. A positioning post 43 with its head exposed is constrained in the radial hole 411, and a spring 44 abuts against the positioning post 43 so that the head of the positioning post always tends to be exposed. Positioning grooves 216, corresponding to the number of first magnets 3 on the swing arm 1, are spaced circumferentially on the inner wall of the seat 211. When the second magnet 42 rotates with the rotating component 41 to correspond to one of the first magnets 3 on the swing arm 1, the positioning post 43 falls into the corresponding positioning groove 216 under the action of the spring 44, and the head of the positioning post 43 hits the bottom of the positioning groove 216 to produce a sound, indicating to the user that the corresponding gear has been rotated.

[0037] To prevent excessive rotation of the rotating component 41, an arc-shaped elongated hole and a limiting pin that can be inserted into the arc-shaped elongated hole and slide relative to it while the rotating component rotates can be provided between the base 211 and the rotating component 41. The position indicator can be located at the edge of the arc-shaped elongated hole. In the figure, the arc-shaped elongated hole 412 is opened on the rotating component 41, and the limiting pin 45 is a screw that passes through the arc-shaped elongated hole 412 and is fixed on the base 211. Of course, the arc-shaped elongated hole can also be opened on the base, and the limiting pin can be set on the rotating component. In addition, to facilitate the application of force to the rotating component 41, a protrusion 413 is also provided on the rotating component 41. Corresponding to the protrusion 413, an arc-shaped operating hole 217 is opened on the base 211, allowing the protrusion 413 to be exposed in the arc-shaped operating hole so that the user can easily access the protrusion 413.

[0038] When adjustment is needed, simply remove the side cover 30 from the main body 10 of the fishing reel (the connection structure between the side cover and the main body of the fishing reel is existing technology; see the structures in Chinese patents CN202220785020.4 and CN20212133247.6, etc., or other existing structures can also be used). At this point, the variable magnetic damping system constrained on the side cover 30 is exposed. Pushing the protrusion 413 allows for convenient adjustment of the magnetic damping force. Specifically, as... Figure 2 At this point, the second magnet 42 is adjacent to the first magnet 3 at the head end of the swing arm 1, i.e., in the first gear position. In the figure, the second magnet 42 and the first magnet 3 have the same polarity, causing the swing arm 1 to be repelled and swing inward (closer to the axis) by a second force. This second force is opposite in direction to the first force generated on the swing arm when the spool rotates out of the wire. Therefore, the magnetic damping force is minimal at the first gear position. When the protrusion 413 is pushed, the rotating component 41 moves along... Figure 2 Rotate clockwise to Figure 7 In this state, the second magnet 42 is aligned with the first magnet 3, which is in the middle position on the swing arm. This is the second gear position. At this time, the second magnet 42 and the first magnet 3 have opposite polarities and attract each other. This attraction is in the same direction as the first force mentioned above. Therefore, the combined magnetic damping force is the greatest in this state. If the protrusion 413 is pushed further, the rotating component 41 will continue to rotate clockwise to... Figure 8 In this state, which is the third gear position, the second magnet 42 is adjacent to the first magnet 3 at the tail end of the swing arm 1. Since the polarities of the two are the same, they will generate a repulsive force. Furthermore, since the first magnet is far away from the pin 5 at the head end of the swing arm, the torque generated by the repulsive force on the swing arm in the third gear position is greater than the torque generated by the repulsive force on the swing arm in the first gear position. That is, at this time, the combined magnetic damping force is between the magnetic damping force in the first gear position and the magnetic damping force between the second gear position.

[0039] Obviously, by adopting this embodiment, during adjustment, only one rotational action is needed to drive the second magnet to rotate and exert force on the first magnet at different positions, ultimately affecting the magnitude of the magnetic damping force when the spool exits the wire. Moreover, this adjustment method has a simple structure and is easy to adjust. No additional structure needs to be added to the spool, making the spool itself relatively small and lightweight. It can achieve the same braking effect with a smaller magnetic damping force. Furthermore, depending on the number of first magnets set on the swing arm, more braking gears can be obtained. The swing arm also does not need to rely on spring reset, making it more convenient to manufacture and lower in cost.

[0040] Similarly, in this embodiment, in order to facilitate fine adjustment of the magnetic damping force, a partially exposed knob 6 and a drive component 7 for driving the axial movement of the aforementioned variable magnetic damping system are also provided on the side cover. This knob 6 and drive component 7 can adopt existing technology. In the figure, the opposite end faces of the drive component 7 and the knob 6 have annular rings 71 with their end faces spirally rising and their bottoms spirally decreasing, and two connecting posts 72 extend from the drive component 7. Each connecting post 72 passes through the damping seat 8 and is connected to the seat 211 in the support component 2 (in the figure, screws pass through the seat 211). After mounting, the threaded connection is made to the threaded hole of the connecting post 72. To avoid obstructing the rotation of the rotating component 41, the connecting post 72 has a clearance groove 414 on its circumferential surface. A first return spring 9 is provided between the driving component 7 and the damping seat 8, or a second return spring (not shown) is fitted onto the connecting post, ensuring that the driving component 7 and the knob 6 are always engaged. The damping seat 8 is mounted on the seat body 211 and fixed to the side cover 30 with three screws. Thus, even after the variable magnetic damping system is constrained to the side cover 30 by the damping seat 8, it can still move axially relative to the damping seat 8.

[0041] When fine-tuning of the magnetic damping force is required, simply rotate knob 6. Through the engagement of the annular ring and groove between knob 6 and drive component 7, drive component 7 can be moved axially towards or away from the reel (under the restoring force of the first or second return spring), thus subtly altering the distance between the first magnet 3, the second magnet 42, and the reel 20. For example... Figure 1 In the middle, the support component 2 and the rotating component 41 are lowered to their lowest position axially, and the magnetic damping force decreases; conversely, rotating the knob 6 in the opposite direction raises the support component 2 and the rotating component 41 to their highest position axially, such as... Figure 9 As shown, the magnetic damping force increases at this time.

[0042] In the preferred embodiment described above, the first magnet 3 on the swing arm 1 acts directly on the winding body portion 201 of the spool 20. Alternatively, the first magnet 3 on the swing arm 1 can be mounted on the end face of the swing arm, allowing it to act directly on the connecting wall portion 203 of the spool; or the first magnet 3 on the swing arm 1 can indirectly magnetically dampen the spool. For example, similar to the prior art, a damping disc that can be inserted into the fixing ring 22 and the support seat 21 is directly fixed on the spool shaft 40, allowing the first magnet to act on the damping disc, thereby indirectly braking the spool. Alternatively, teeth can be provided on the circumferential surface of the rotating component 41, and gears or gear sets that mesh with these teeth can be arranged on the side cover. The gears or gear sets can be driven by an operating button exposed on the side cover, thereby driving the rotating component to rotate. Alternatively, other structures can be used for the support component. Alternatively, other fine-tuning damping force structures can be selected. That is, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A variable magnetic damping system for a fishing reel, mounted on one side of a reel (20), the variable magnetic damping system comprising a swing arm (1), a support member (2) for supporting the swing arm (1), at least two first magnets (3) of opposite polarities, and an adjustment member (4) for adjusting the magnitude of magnetic damping, wherein at least one of the first magnets (3) is mounted on the swing arm (1), and the head end of the swing arm (1) is rotatably supported on the support member (2) so that the swing arm (1) can move closer to or away from the reel shaft (40), characterized in that: The adjusting component (4) includes a rotating component (41) that can rotate relative to the supporting component (2) and a second magnet (42) mounted on the rotating component (41) that can cooperate with the first magnet (3). The supporting component (2) includes a supporting seat (21), wherein the supporting seat (21) includes a seat body (211), a first cylindrical body (212) on one end face of the seat body extending axially toward the spool side along the spool, and a similar spool shaft (40) on the other end face of the seat body. The rotating component (41) is sleeved on the second cylinder (213) which extends to and penetrates the first cylinder. The swing arm (1) is located on the outer periphery of the first cylinder (212). There are at least two first magnets (3) on the swing arm (1) that are spaced apart and the polarities of adjacent first magnets (3) are opposite. The second magnet can approach or move away from the corresponding first magnet (3) on the swing arm (1) as the rotating component (41) rotates, so that the swing arm swings outward or inward.

2. The variable magnetic damping system according to claim 1, characterized in that: When the number of first magnets (3) on the swing arm (1) is odd, an auxiliary magnet (3a) adjacent to the head or tail end of the swing arm (1) is also installed on the support member (2). The auxiliary magnet (3a) is set with opposite polarity to the adjacent first magnet (3).

3. The variable magnetic damping system according to claim 1, characterized in that: There are multiple swing arms (1), which are supported on the support member (2) in a circumferential manner, one end to the other. Correspondingly, the number of the second magnets (42) matches the number of swing arms (1).

4. The variable magnetic damping system according to any one of claims 1 to 3, characterized in that: The rotating component (41) has a radial hole (411) on its circumferential surface. A positioning post (43) with its head exposed is constrained in the radial hole (411), and a spring (44) abuts against the positioning post (43) so that the head of the positioning post always tends to be exposed. Positioning grooves (216) corresponding to the number of first magnets (3) on the swing arm (1) are provided circumferentially on the inner wall of the support component (2). When the second magnet (42) corresponds to the first magnet (3) on the swing arm (1), the positioning post (43) can fall into the corresponding positioning groove (216) in sequence as the rotating component (41) rotates.

5. The variable magnetic damping system according to any one of claims 1 to 3, characterized in that: The support component (2) also includes a fixing ring (22), which is fixed to the top surface of the extension end of the first cylinder (212).

6. The variable magnetic damping system according to claim 1, characterized in that: An arc-shaped elongated hole (412) and a limiting pin (45) that can be inserted into the arc-shaped elongated hole and slide relative to the arc-shaped elongated hole as the rotating component (41) rotates are provided between the rotating component (41) and the seat (211).

7. The variable magnetic damping system according to claim 6, characterized in that: The edge of the arc-shaped elongated hole (412) is marked with the gear position of the magnetic damping.

8. The variable magnetic damping system according to claim 1, characterized in that: The rotating component (41) is also provided with a protrusion (413) for easy application of force, and the seat (211) has an arc-shaped operating hole (217), with the protrusion (413) exposed in the arc-shaped operating hole (217).

9. The variable magnetic damping system according to any one of claims 1 to 3, characterized in that: The swing arm (1) is assembled from an upper arm body (1a) and a lower arm body (1b), and a magnetic shielding sheet (1c) is provided in the upper arm body (1a) and the lower arm body (1b). The first magnet (3) is embedded on the outer surface of the swing arm (1) outside the magnetic shielding sheet (1c).

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