Air-magnetic combined multi-stage adjustable resistance output structure

Abstract

Provided in the present utility model is an air-magnetic combined multi-stage adjustable resistance output structure, comprising a housing, an adjustment cover, an air resistance fan blade assembly, a magnetic resistance mechanism and a magnetic resistance ring. By means of the rotation of the adjustment cover, the degree of overlap between an air inlet structure and a grid structure is changed, thereby adjusting the magnitude of air resistance; moreover, the rotation of the adjustment cover drives a magnetic base to move towards or away from the magnetic resistance ring, thereby adjusting the magnitude of magnetic resistance. The structure achieves coordinated adjustment of air resistance and magnetic resistance, providing a wider range of resistance adjustment, thereby satisfying exercise requirements of different users; the structure is compact and installation and maintenance are easy.

Description

A wind and magnetic superposition multi-stage adjustable resistance output structure Technical Field

[0001] This utility model relates to the technical field of resistance output structure, and in particular to a wind and magnetic superposition multi-stage adjustable resistance output structure. Background Technology

[0002] In the field of modern fitness equipment, aerobic exercise equipment such as rowing machines and exercise bikes are widely popular among consumers because they can effectively improve cardiovascular function and enhance muscle strength. To better meet the needs of different user groups, these devices are usually equipped with adjustable resistance systems, allowing users to adjust the exercise intensity according to their fitness level and training goals.

[0003] Currently, the most common drag output structures on the market can be divided into three types: wind resistance, magnetic resistance, and a combination of both (wind and magnetic resistance). Wind resistance generates drag through the interaction between rotating blades and the air, characterized by low cost and simple maintenance; however, this type of drag output is significantly affected by environmental factors, such as changes in temperature and humidity, which can affect drag stability. Magnetic resistance output, on the other hand, uses changes in the electromagnetic field to alter the drag magnitude. This method provides a smoother and more precise drag adjustment experience, but it is correspondingly more expensive and requires more stringent manufacturing processes.

[0004] The wind-magnetic dual-resistance output structure integrates the advantages of the two methods mentioned above, aiming to provide a choice that can both guarantee a good user experience and have a high cost performance.

[0005] However, in practical applications, it has been found that the design of this type of composite resistance output structure is relatively complex, which not only increases the difficulty and cost of product manufacturing, but also poses certain inconveniences for ordinary users. In addition, since it is necessary to manage two different resistance sources, wind resistance and magnetic resistance, simultaneously ensuring their coordinated operation and achieving efficient and accurate resistance adjustment has become a challenge.

[0006] In view of this, the inventor has designed a wind and magnetic superposition multi-stage adjustable resistance output structure, which leads to this invention. Utility Model Content

[0007] To solve the above problems, the technical solution of this utility model is as follows:

[0008] A wind and magnetic superposition multi-stage adjustable resistance output structure includes:

[0009] The housing has an air intake area formed through its middle section, and the air intake area is covered with a grid structure.

[0010] An adjustable cover is rotatably connected to the upper end of the air intake area and is provided with an air intake structure corresponding to the grid structure. The air intake structure and the grid structure have different degrees of overlap that change linearly as the adjustable cover rotates to change the air intake volume. A fixed arm is provided on one side of the rotation center of the adjustable cover.

[0011] The wind resistance fan blade is ring-shaped and rotatably connected to the lower end of the grid structure of the housing. It is used to rotate under the traction of external power to feed back the wind resistance generated by the fan blade cutting the air.

[0012] A magnetic reluctance mechanism includes a swing arm and a magnetic base. The middle part of the swing arm is movably connected to the bottom of the housing and is located on one side of a fixed arm. The magnetic base is located at the end of the swing arm away from the fixed arm. The other end of the swing arm is hinged to the end of the fixed arm.

[0013] A magnetic resistance ring is used to generate resistance by magnetic attraction with a magnetic base. The magnetic resistance ring is ring-shaped and adapted to the wind resistance fan blade and is located at the upper end of the wind resistance fan blade. When the adjustment cover rotates, it drives the swing arm to move via the fixed arm so that the magnetic base moves in a direction close to or away from the magnetic resistance ring.

[0014] Preferably, the air intake area is circular, and the grid structure includes a plurality of first fixed ribs evenly distributed along the circumference of the air intake area and a first gap rib continuously surrounding and fixed on the plurality of first fixed ribs. The middle parts of the plurality of first fixed ribs converge at the center of the air intake area and are provided with insertion holes.

[0015] Preferably, the adjusting cover includes a disc-shaped frame that can cover the air intake area. An air intake groove of the same size as the air intake area is opened in the middle of the frame. A plurality of second fixing ribs are provided in the air intake groove, which are one-to-one with the first fixing ribs. Second gap ribs of the same shape and size as the first gap ribs are continuously arranged around the plurality of second fixing ribs. A columnar fixing seat is detachably connected to the bottom of the center of the frame. The fixing seat is clearance-fitted with the insertion hole. The fixing arm is a sheet-like structure that extends horizontally outward along the circumference of the bottom of the fixing seat.

[0016] Preferably, both the first and second gap ribs are continuously distributed spiral curves.

[0017] Preferably, the lower end face of the grid structure is provided with a first bushing, the bottom of the first bushing is provided with a columnar first spacer, the middle part of the swing arm is provided with an adjustment groove distributed in a linear pattern, the diameter of the first spacer is adapted to the gap of the adjustment groove and its top is provided with an annular limiting ring, the bottom of the first spacer is provided with a detachable circular flat pad, the first spacer passes through the adjustment groove and the flat pad limits the movement of the swing arm between the limiting ring and the flat pad so that the swing arm can rotate based on the limiting point of the first spacer or move linearly within the limiting range of the adjustment groove.

[0018] Preferably, the end of the fixed arm away from the fixed seat is vertically provided with a first shaft hole, the end of the swing arm near the fixed arm is vertically provided with a second shaft hole that mates with the first shaft hole, and the end of the swing arm is hinged to the upper end of the fixed wall by pivoting the second shaft hole and the first shaft hole.

[0019] Preferably, the end of the swing arm away from the fixed seat and protruding from its side wall has a mounting edge, the bottom of which is recessed inward to form a mounting groove, and the magnetic seat is embedded in the mounting groove.

[0020] Preferably, the upper end of the swing arm is recessed downward to form a limiting groove that is linearly distributed along the length of the swing arm, and the distance between the two sides of the limiting groove is greater than the outer diameter of the limiting ring.

[0021] Preferably, an adjustment lever is provided on the periphery of the frame along its radial direction, and an adjustment area is provided on the upper end of the housing and on the periphery of the air intake area in an arc shape. Stop plates are provided on both sides of the adjustment area, and multiple adjustment position marks corresponding to different rotation angles of the adjustment lever are provided in the adjustment area. The adjustment lever is located in the adjustment area.

[0022] Preferably, the wind resistance fan blade includes an upper fixed ring, a lower fixed ring, and resistance blades evenly distributed around the circumferential space between the upper and lower fixed rings, and the magnetic resistance ring is concentrically disposed at the upper end of the upper fixed ring.

[0023] The beneficial effects of this utility model are as follows:

[0024] This invention effectively integrates wind resistance and magnetic resistance, two resistance adjustment methods, to achieve more flexible and precise resistance adjustment.

[0025] First, by adjusting the rotation of the shroud, the overlap between the air intake structure and the grid structure can be changed, thereby altering the air intake volume and thus the wind resistance to a certain extent. At the same time, by adjusting the rotation of the shroud, the magnetic base moves towards or away from the magnetic resistance ring, resulting in different magnetic attraction effects between the magnetic resistance ring and the magnetic base, achieving different levels of resistance. In this way, not only can multi-level adjustments be made according to the user's movement needs, but stable performance can also be maintained in different environments.

[0026] In addition, the adjustment of wind resistance combined with magnetic resistance makes the overall resistance output adjustment range wider, which can meet the wider range of users' exercise needs.

[0027] In particular, this invention cleverly utilizes the internal space to integrate the wind resistance and magnetic resistance components into a compact unit, which saves space and facilitates installation and maintenance. Attached Figure Description

[0028] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0029] in:

[0030] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0031] Figure 2 is one of the exploded structural diagrams of this utility model;

[0032] Figure 3 is a partial structural schematic diagram of the wind resistance-prominent fan blade of this utility model;

[0033] Figure 4 is the second of the exploded structural schematic diagrams of this utility model;

[0034] Figure 5 is a partial structural schematic diagram highlighting the magnetoresistive mechanism in this utility model;

[0035] Figure 6 is a partial structural schematic diagram of the upper end structure of the shell in this utility model;

[0036] Figure 7 is one of the partial exploded structural diagrams of the magnetoresistive mechanism in this utility model;

[0037] Figure 8 is a partial exploded structural diagram of the magnetoresistive mechanism in this utility model.

[0038] Label Explanation:

[0039] 10. Housing; 11. Air intake area; 12. Grid structure; 121. First fixing rib; 122. First gap rib; 13. Insertion hole; 14. First bushing; 15. First spacer; 151. Limiting ring; 152. Flat washer; 20. Adjusting cover; 21. Air intake structure; 211. Second fixing rib; 212. Second gap rib; 22. Frame; 23. Air intake slot; 24. Fixing arm; 241. 1. Shaft hole; 25. Fixed seat; 26. Connecting plate; 27. Connecting part; 30. Wind resistance fan blade; 31. Upper fixing ring; 32. Lower fixing ring; 33. Resistance blade; 40. Magnetic resistance mechanism; 41. Swing arm; 42. Magnetic seat; 43. Adjustment groove; 44. Second shaft hole; 45. Mounting edge; 46. Mounting groove; 47. Limiting groove; 50. Magnetic resistance ring; 60. Adjustment lever; 70. Adjustment area; 71. Stop plate. Detailed Implementation

[0040] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0041] Please refer to Figures 1 to 8, which illustrate a wind and magnetic superposition type multi-stage adjustable resistance output structure as a preferred embodiment of this utility model. The structure includes: a housing 10, an adjustment cover 20, wind resistance fan blades 30, a magnetic resistance mechanism 40, and a magnetic resistance ring 50, wherein:

[0042] The housing 10 is circular in shape, and a circular air intake area 11 concentric with the whole is formed through the middle of the housing 10. The air intake area 11 is covered with a grid structure 12.

[0043] The regulating cover 20 is generally in the shape of a disc adapted to the air intake area 11 and can completely cover the air intake area 11. The regulating cover 20 is rotatably connected to the upper end of the air intake area 11 and is provided with an air intake structure 21 corresponding to the grid structure 12. The air intake structure 21 and the grid structure 12 have different degrees of overlap that change linearly with the rotation of the regulating cover 20 to change the air intake volume. A fixed arm 24 is provided on one side of the lower end of the rotation center of the regulating cover 20.

[0044] The wind resistance fan blade 30 is annular and rotatably connected to the lower end of the grid structure 12 of the housing 10, and is used to rotate under external power to feed back the wind resistance generated by the fan blade cutting the air.

[0045] In this embodiment, the wind resistance fan blade 30 includes an upper fixing ring 31, a lower fixing ring 32, and resistance blades 33 evenly distributed around the circumferential space between the upper fixing ring 31 and the lower fixing ring 32.

[0046] The magnetic resistance mechanism 40 includes a swing arm 41 and a magnetic base 42. The middle part of the swing arm 41 is movably connected to the bottom of the housing 10 and is located on one side of the fixed arm 24. The magnetic base 42 is located at the end of the swing arm 41 away from the fixed arm 24. The other end of the swing arm 41 is hinged to the end of the fixed arm 24.

[0047] The magnetic resistance ring 50 is used to magnetically attract the magnetic base 42 to generate resistance. The magnetic resistance ring 50 is ring-shaped to match the wind resistance fan blade 30 and is located at the upper end of the wind resistance fan blade 30. When the adjusting cover 20 rotates, it drives the swing arm 41 to move via the fixed arm 24 so that the magnetic base 42 moves in the direction of approaching or moving away from the magnetic resistance ring 50. The magnetic resistance ring 50 is concentrically arranged on the upper end face of the upper fixed ring 31 and is located below the magnetic base 42, with a certain gap between it and the magnetic base 42.

[0048] Specifically, the air intake area 11 is circular, and the grid structure 12 includes six first fixed ribs 121 evenly distributed along the circumference of the air intake area 11 and first gap ribs 122 continuously surrounding and fixed on the first fixed ribs 121. The first gap ribs 122 and the fixed ribs form an air intake gap (not shown in the figure) for air intake. The middle parts of the first fixed ribs 121 converge at the center of the air intake area 11 and are provided with a circular insertion hole 13.

[0049] Preferably, the adjusting cover 20 includes a disc-shaped frame 22 that can cover the air intake area 11. A circular air intake groove 23 of the same size as the air intake area 11 is opened in the middle of the frame 22. Several second fixing ribs 211 of the same size and arrangement as the first fixing ribs 121 are provided in the air intake groove 23. Second gap ribs 212 of the same shape and size as the first gap ribs 122 are continuously arranged around the several second fixing ribs 211. The second fixing ribs 211 and the second gap ribs 212 constitute the air intake structure 21. A columnar fixing seat 25 is detachably connected to the bottom of the center of the frame 22. The fixing seat 25 is clearance-fitted with the insertion hole 13. The fixing arm 24 is a sheet-like structure that extends horizontally outward along the circumference of the bottom of the fixing seat 25.

[0050] Specifically, the top of the fixed base 25 protrudes integrally to form a disc-shaped connecting plate 26 around its axis, and the bottom center of the adjusting cover 20 protrudes to form a columnar connecting part 27. The connecting part 27 can pass through the insertion hole 13 to reach the interior of the housing 10. Several locking holes (not shown in the figure) are provided on the connecting plate 26 and the connecting part 27 to lock the connection with bolts, thereby realizing the convenient connection between the adjusting cover 20 and the fixed base 25 and realizing their synchronous rotation function.

[0051] Therefore, when the regulating cover 20 rotates, the overlap between the grid structure 12 and the air intake structure 21 is changed first, thereby changing the amount of air intake and causing the wind resistance fan blade 30 to obtain different resistance feedback when rotating. At the same time, by rotating the regulating cover 20, the fixed base 25 is driven to rotate synchronously, which causes the fixed arm 24 at the lower end of the fixed base 25 to drive the swing arm 41 to move, resulting in a change in the distance between the magnetic seat 42 on the swing arm 41 and the magnetic resistance ring 50 at the upper end of the wind resistance fan blade 30. Thus, on the basis of wind resistance, the magnetic resistance between the magnetic seat 42 and the magnetic resistance ring 50 is superimposed or weakened, ultimately affecting the resistance of the wind resistance fan blade 30 when rotating.

[0052] Preferably, both the first gap rib 122 and the second gap rib 212 are continuously distributed spiral curves.

[0053] As the regulating hood 20 rotates, the overlap between the spiral-shaped air intake structure 21 and the grid structure 12 changes continuously and smoothly, facilitating more refined and precise drag adjustment. This is highly advantageous for professional trainees who need to frequently adjust drag levels.

[0054] Preferably, the lower end face of the grid structure 12 is provided with a first bushing 14, the bottom of the first bushing 14 is detachably provided with a columnar first spacer 15, the middle of the swing arm 41 is provided with an adjustment groove 43 distributed in a linear pattern, the diameter of the first spacer 15 is adapted to the gap of the adjustment groove 43 and its top is provided with an annular limiting ring 151, the bottom of the first spacer 15 is detachably provided with a circular flat pad 152, the first spacer 15 passes through the adjustment groove 43 and the flat pad 152 limits the movement of the swing arm 41 between the limiting ring 151 and the flat pad 152 so that the swing arm 41 can rotate based on the limiting point of the first spacer 15 or move linearly within the limitation range of the adjustment groove 43.

[0055] Furthermore, the end of the fixed arm 24 away from the fixed base 25 is vertically provided with a first shaft hole 241, and the end of the swing arm 41 near the fixed arm 24 is vertically provided with a second shaft hole 44 that cooperates with the first shaft hole 241. The end of the swing arm 41 is hinged to the upper end of the fixed wall by pivoting the second shaft hole 44 and the first shaft hole 241.

[0056] After the fixed arm 24, the swing arm 41 and the first bushing 14 are connected, when the adjusting cover 20 rotates, the fixed seat 25 rotates accordingly, thereby driving the swing arm 41 to rotate through the fixed arm 24 on the fixed arm 24. When the adjusting cover 20 rotates to one side, the swing arm 41 is pulled and rotates to the same side of the fixed arm 24 based on the fixed point of the first bushing 14. At the same time, it is pulled along the length direction of the adjusting groove 43 to move away from the magnetic reluctance ring 50, so that the magnetic seat 42 swings away from the magnetic reluctance ring 50 in an arc. Conversely, when the adjusting cover 20 rotates in the opposite direction, the swing arm 41 is pushed, so that the magnetic seat 42 moves in a direction close to the magnetic reluctance ring 50. As the magnetic seat 42 and the magnetic reluctance ring 50 gradually approach each other, the magnetic resistance generated by the two gradually increases, thereby realizing the adjustment of the magnitude of the magnetic resistance.

[0057] Preferably, the end of the swing arm 41 away from the fixed base 25 and protruding from its side wall is provided with an installation edge 45, the bottom of the installation edge 45 is recessed inward to form an installation groove 46, and the magnetic base 42 is embedded in the installation groove 46.

[0058] In this embodiment, the mounting edge 45 is circular and has an arc transition with the side wall of the swing arm 41, the mounting groove 46 is circular, and the magnetic base 42 is a column that fits into the mounting groove 46.

[0059] Thus, the magnetic base 42 can be easily installed and fixed by mounting along the mounting edge 45, and the opening of the mounting groove 46 is set at the bottom, so that the gap between the magnetic base 42 and the magnetic reluctance ring 50 can be reduced, so that a stable magnetic attraction structure can be formed.

[0060] Preferably, the upper end of the swing arm 41 is recessed downward to form a limiting groove 47 that is linearly distributed along the length of the swing arm 41, and the distance between the two sides of the limiting groove 47 is greater than the outer diameter of the limiting ring 151.

[0061] Thus, by setting the limiting groove 47, the limiting ring 151 on the first bushing 14 can be stably restricted within the limiting groove 47, making it more stable when moving with the swing arm 41.

[0062] Preferably, an adjustment lever 60 is provided on the radially outward side of the frame 22, and an adjustment area 70 is provided on the upper end of the housing 10 and on the circumference of the air intake area 11 in an arc shape. Stop plates 71 are provided on both sides of the adjustment area 70, and multiple adjustment position marks corresponding to different rotation angles of the adjustment lever 60 are provided in the adjustment area 70. The adjustment lever 60 is located in the adjustment area 70.

[0063] In this embodiment, the central angle corresponding to the adjustment zone 70 is 72°, and it is evenly divided into 10 gear ranges. In the range of 1-7, only the size of the overlapping area between the intake structure 21 and the grille structure is changed, that is, only wind resistance is affected. In the range of 8-10, the magnetic seat 42 will move into the working area of ​​the magnetic resistance ring 50 and attract each other with the magnetic resistance ring 50 to generate magnetic force, thereby realizing convenient adjustment of the resistance.

[0064] The adjustment lever 60 and the stop plate 71 enable convenient rotation adjustment of the adjustment cover 20 and limit the rotation range of the adjustment cover 20.

[0065] The beneficial effects of this utility model are as follows:

[0066] This invention effectively integrates wind resistance and magnetic resistance, two resistance adjustment methods, to achieve more flexible and precise resistance adjustment.

[0067] First, by adjusting the rotation of the cover 20, the air intake volume can be changed by altering the overlap between the air intake structure 21 and the grid structure 12, thereby changing the wind resistance to a certain extent. At the same time, by adjusting the rotation of the cover 20, the magnetic base 42 is moved towards or away from the magnetic resistance ring 50, resulting in different magnetic attraction effects between the magnetic resistance ring 50 and the magnetic base 42, achieving different resistance levels. In this way, not only can multi-level adjustments be made according to the user's movement needs, but stable performance can also be maintained in different environments.

[0068] In addition, the adjustment of wind resistance combined with magnetic resistance makes the overall resistance output adjustment range wider, which can meet the wider range of users' exercise needs.

[0069] In particular, this invention cleverly utilizes the internal space to integrate the wind resistance and magnetic resistance components into a compact unit, which saves space and facilitates installation and maintenance.

[0070] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A wind and magnetic superposition type multi-stage adjustable resistance output structure, characterized in that, include: The housing (10) has an air intake area (11) formed through its middle part, and the air intake area (11) is covered with a grid structure (12). An adjustment cover (20) is rotatably connected to the upper end of the air intake area (11) and is provided with an air intake structure (21) corresponding to the grid structure (12). The air intake structure (21) and the grid structure (12) have different degrees of overlap that change linearly with the rotation of the adjustment cover (20) to change the air intake volume. A fixed arm (24) is provided on one side of the rotation center of the adjustment cover (20). The wind resistance fan blade (30) is ring-shaped and rotatably connected to the lower end of the grid structure (12) of the housing (10), and is used to rotate under external power to feed back the wind resistance generated by the fan blade cutting the air; The magnetic resistance mechanism (40) includes a swing arm (41) and a magnetic base (42). The middle part of the swing arm (41) is movably connected to the bottom of the housing (10) and is located on one side of the fixed arm (24). The magnetic base (42) is located at one end of the swing arm (41) away from the fixed arm (24). The other end of the swing arm (41) is hinged to the end of the fixed arm (24). A magnetic resistance ring (50) is used to magnetically engage with a magnetic base (42) to generate resistance. The magnetic resistance ring (50) is in the shape of a ring adapted to the wind resistance fan blade (30) and is located at the upper end of the wind resistance fan blade (30). When the adjustment cover (20) rotates, it drives the swing arm (41) to move via the fixed arm (24) so ​​that the magnetic base (42) moves in the direction of approaching or moving away from the magnetic resistance ring (50).

2. The wind and magnetic superposition type multi-stage adjustable resistance output structure according to claim 1, characterized in that, The air intake area (11) is circular, and the grid structure (12) includes a number of first fixed ribs (121) evenly distributed along the circumference of the air intake area (11) and a number of first gap ribs (122) continuously surrounding and fixed on the number of first fixed ribs (121). The middle parts of the number of first fixed ribs (121) converge at the center of the air intake area (11) and are provided with insertion holes (13).

3. The wind and magnetic superposition type multi-stage adjustable resistance output structure according to claim 2, characterized in that, The adjustment cover (20) includes a disc-shaped frame (22) that can cover the air intake area (11). The frame (22) has an air intake groove (23) of the same size as the air intake area (11) in the middle. The air intake groove (23) is provided with a number of second fixing ribs (211) that are one-to-one with the first fixing ribs (121). A number of second gap ribs (212) of the same shape and size as the first gap ribs (122) are continuously arranged around the number of second fixing ribs (211). A columnar fixing seat (25) is detachably connected to the bottom of the center of the frame (22). The fixing seat (25) is in clearance fit with the insertion hole (13). The fixing arm (24) is a sheet-like structure that extends horizontally outward along the circumference of the bottom of the fixing seat (25).

4. The wind and magnetic superposition type multi-stage adjustable resistance output structure according to claim 3, characterized in that, The first gap rib (122) and the second gap rib (212) are both continuously distributed spiral curves.

5. The wind and magnetic superposition type multi-stage adjustable resistance output structure according to claim 3, characterized in that, The lower end face of the grid structure (12) is provided with a first bushing (14), the bottom of the first bushing (14) is provided with a first spacer (15) in the shape of a column, the middle part of the swing arm (41) is provided with an adjustment groove (43) distributed in a linear pattern, the diameter of the first spacer (15) is adapted to the gap of the adjustment groove (43) and the top of it is provided with a ring-shaped limiting ring (151), the bottom of the first spacer (15) is detachably provided with a circular flat pad (152), the first spacer (15) passes through the adjustment groove (43) and the flat pad (152) limits the movement of the swing arm (41) between the limiting ring (151) and the flat pad (152) so that the swing arm (41) can rotate based on the limiting point of the first spacer (15) or move linearly within the limiting range of the adjustment groove (43).

6. The wind and magnetic superposition type multi-stage adjustable resistance output structure according to claim 3, characterized in that, The fixed arm (24) is vertically provided with a first shaft hole (241) at one end away from the fixed seat (25), and the swing arm (41) is vertically provided with a second shaft hole (44) that cooperates with the first shaft hole (241) at one end close to the fixed arm (24). The end of the swing arm (41) is hinged to the upper end of the fixed wall by pivoting the second shaft hole (44) and the first shaft hole (241).

7. The wind and magnetic superposition type multi-stage adjustable resistance output structure according to claim 6, characterized in that, The swing arm (41) has an installation edge (45) protruding from its side wall at one end away from the fixed base (25). The bottom of the installation edge (45) is recessed inward to form an installation groove (46), and the magnetic base (42) is embedded in the installation groove (46).

8. The wind and magnetic superposition type multi-stage adjustable resistance output structure according to claim 5, characterized in that, The upper end of the swing arm (41) is recessed downward to form a limiting groove (47) that is linearly distributed along the length direction of the swing arm (41). The distance between the two sides of the limiting groove (47) is greater than the outer diameter of the limiting ring (151).

9. The wind and magnetic superposition type multi-stage adjustable resistance output structure according to claim 3, characterized in that, An adjustment lever (60) is provided on the periphery of the frame (22) along its radial outward. An adjustment area (70) is provided on the upper end of the housing (10) and on the periphery of the air intake area (11) in an arc shape. Stop plates (71) are provided on both sides of the adjustment area (70), and multiple adjustment gear markings corresponding to different rotation angles of the adjustment lever (60) are provided in the adjustment area (70). The adjustment lever (60) is located in the adjustment area (70).

10. The wind and magnetic superposition type multi-stage adjustable resistance output structure according to claim 1, characterized in that, The wind resistance fan blade (30) includes an upper fixed ring (31), a lower fixed ring (32), and resistance blades (33) evenly distributed around the circumferential space between the upper fixed ring (31) and the lower fixed ring (32). The magnetic resistance ring (50) is concentrically located at the upper end of the upper fixed ring (31).

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