Resistance device of fitness machine and fitness machine

Abstract

The present invention discloses a resistance device of a fitness machine, comprising a wind resistance unit and a magnetic resistance unit; the wind resistance unit comprises an air volume adjustment disk, and the flow rate of a flow channel is adjusted by rotating the air volume adjustment disk to change the resistance of the wind resistance; the magnetic resistance unit comprises a guide plate, a metal ring, at least one magnetic seat and at least one guide post; the guide plate has a guide plate track for the guide post to pass through; the magnetic seat is used to generate magnetic resistance with the metal ring, and the magnetic seat has a magnetic seat track; the guide post is connected to the air volume adjustment plate and passes through the guide plate track and extends into the magnetic seat track, and the guide post can move in the magnetic seat track with the rotation of the air volume adjustment plate to drive the magnetic seat to pivot relative to the guide plate to adjust the magnetic resistance between the magnetic seat and the metal ring. The resistance of the present invention is easy to adjust and the resistance adjustment range is large. The present invention also discloses a fitness machine using the above resistance device.

Description

Technical Field

[0001] The invention relates to fitness equipment, in particular to a resistance device of a fitness machine and the fitness machine. Background Art

[0002] The flywheel exercise bike simulates the feeling of riding a real road bike. Through the multi-stage resistance device, it can simulate different riding slopes or resistances, and can train the cardiopulmonary, leg and whole body muscles at the same time. In addition, the flywheel exercise bike has good durability and is very suitable for trainers who want to do high-intensity interval training (HIIT).

[0003] The existing resistance devices are divided into two types: wind resistance type and magnetic resistance type. The resistance adjustment range of a single wind resistance type resistance device or a single magnetic resistance type resistance device is relatively small and cannot meet the requirements of some users. Therefore, flywheel exercise bikes with both wind resistance and magnetic resistance are also available on the market, but the wind resistance and magnetic resistance are adjusted separately, which is troublesome to operate and inconvenient to use. Summary of the invention

[0004] Therefore, one object of the present invention is to provide a resistance device for a fitness machine that is easy to adjust the resistance and has a large resistance adjustment range.

[0005] To achieve the above object, the technical solution of the present invention is: a resistance device of a fitness machine, comprising a wind resistance unit and a magnetic resistance unit.

[0006] The wind resistance unit includes a housing, a wind wheel, a rotating shaft and an air volume adjustment plate. The wind wheel and the air volume adjustment plate are installed in the housing. The wind wheel is fixedly connected to the rotating shaft and can rotate relative to the housing around the axis of the rotating shaft. The air volume adjustment plate can rotate relative to the housing and cooperate with the housing to define a flow channel for air flow. The flow rate of the flow channel can be adjusted by rotating the air volume adjustment plate.

[0007] The magnetic resistance unit is adjustably arranged in the wind resistance unit, and the magnetic resistance unit includes:

[0008] A guide plate, surrounding the axis of the rotating shaft and fixedly connected to the housing, the guide plate having at least one guide plate track;

[0009] A metal ring sheet, surrounding the axis of the rotating shaft and rotating along with the wind wheel;

[0010] At least one magnetic seat, which has magnetism and is used to generate magnetic resistance with the metal ring, and the magnetic seat is pivotally disposed on the guide plate and has a magnetic seat track;

[0011] At least one guide post, the number of which is the same as the number of the magnetic seats, the guide post is connected to the air volume adjustment disk and passes through the guide disk track and extends into the magnetic seat track. The guide post can move within the magnetic seat track as the air volume adjustment disk rotates to drive the magnetic seat to pivot relative to the guide track disk to adjust the magnetic resistance between the magnetic seat and the metal ring.

[0012] According to a further improvement, the magnetic seat track has a first end, a second end opposite to the first end, and a turning portion located between the first end and the second end; when the guide column is located at the second end, the resistance device of the fitness machine only generates wind resistance, and when the guide column slides from the second end and passes through the turning portion, the resistance device of the fitness machine generates both wind resistance and magnetic resistance.

[0013] Furthermore, the magnetic base also has a pivot point pivotally connected to the guide rail plate, and a magnetic area away from the pivot point and used to generate magnetic resistance with the metal ring. The magnetic base track extends from the pivot point toward the magnetic area, and the magnetic base track is bent near the magnetic area. The magnetic resistance generated by the guide post sliding to the first end is greater than the magnetic resistance generated by the guide post sliding to the second end.

[0014] Furthermore, the at least one magnetic seat has a seat body pivotally connected to the guide rail plate, and at least one magnetic component arranged on the seat body, the seat body has the magnetic seat track, and the magnetic component forms the magnetic area. When the guide post is located at the first end, the projection of the magnetic component overlaps with the metal ring sheet; when the guide post is located at the second end of the magnetic seat track, the projection of the magnetic component does not fall within the range of the metal ring sheet.

[0015] Preferably, the magnetic resistance unit includes two magnetic seats and two guide pillars, and the magnetic seats are symmetrically arranged with the axis of the rotating shaft as the center.

[0016] Preferably, each magnetic seat has a seat body pivotally connected to the guide plate, and at least one magnetic member disposed on the seat body.

[0017] Preferably, the magnetic seat is located between the guide plate and the metal ring sheet on the axis of the rotating shaft.

[0018] As a further improvement, the wind resistance unit also includes an indicator fixed to the air volume adjustment plate, the indicator is exposed from the housing and is used to indicate the resistance level, so as to indicate the magnitude of the resistance, which is convenient for trainees to use.

[0019] Preferably, the metal ring piece is in the shape of a ring, the guide rail disc is in the shape of a disc, and the central axis of the metal ring piece overlaps with the central axis of the guide rail disc.

[0020] Another object of the present invention is to provide a fitness machine that is convenient for adjusting wind resistance and magnetic resistance at the same time.

[0021] Therefore, the fitness machine of the present invention comprises a frame unit, a force applying group operably arranged on the frame unit, and the aforementioned resistance device of the fitness machine, wherein the resistance device of the fitness machine is used to generate resistance and is installed on the frame unit and connected to the force applying group.

[0022] The effect of the present invention is: wind resistance is generated by the wind resistance unit, magnetic resistance is generated by the magnetic resistance unit, and the wind resistance is adjusted by rotating the air volume adjustment disk. In the process of adjusting the wind resistance, the air volume adjustment disk can drive the at least one guide column to slide relative to the guide rail disk to pivot the at least one magnetic seat, and change the overlap degree of the magnetic area on the magnetic seat projected on the metal ring to adjust the magnetic resistance. Therefore, the wind resistance and magnetic resistance can be adjusted at the same time by rotating the air volume adjustment disk, and the resistance adjustment is very convenient. On the other hand, since the resistance is generated by superimposing wind resistance and magnetic resistance, the adjustment range of the resistance is relatively large. It can generate a larger movement resistance, improve the training effect, and meet the needs of different trainees. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional exploded view of the resistance device of the present invention;

[0024] Figure 2 is a side view of the resistance device of the present invention, and a protective cover is omitted in the figure;

[0025] Figure 3 It is along Figure 2 A sectional view taken along line IV-IV in FIG.

[0026] Figure 4 is a three-dimensional diagram of a magnetic resistance unit of a resistance device of the present invention;

[0027] Figure 5 is an incomplete side view illustrating that each guide post of the magnetic resistance unit is located at the second end of each magnetic base track;

[0028] Figure 6 is similar to Figure 2 A view showing that rotating an air volume adjustment disk increases the wind resistance;

[0029] Figure 7 is similar to Figure 5 , which illustrates that each guide post of the magnetic resistance unit passes through a turning portion of each magnetic base track, and the magnetic resistance unit begins to generate magnetic resistance;

[0030] Figure 8 is similar to Figure 6 The view shows that the air volume adjustment disk should continue to be rotated to the flow rate with the maximum wind resistance;

[0031] Fig. 9 is similar to Figure 7, illustrating that each guide post of the magnetic resistance unit is located at a first end of each magnetic base track, and the resistance of the magnetic resistance unit is the largest;

[0032] Fig.10 is a three-dimensional diagram of a first embodiment of a fitness machine of the present invention;

[0033] Fig.11 is a perspective view of a second embodiment of a fitness machine of the present invention;

[0034] Fig.12 is a perspective view of a third embodiment of a fitness machine of the present invention;

[0035]

Explanation of symbols

[0036] 1: Fitness machine 1': Fitness machine 1": Fitness machine 10: Rack unit 10': Rack unit 10": Rack unit 20: Force application group 20': Force application group 20": Force application group

[0037] 30: armrest 40: saddle 40': saddle 500: resistance device 6: wind resistance unit 61: shell 611: bottom cover 612: outer cover 613: protective cover 614: air inlet area 615: shielding area 616: slot 62: rotating shaft 63: wind wheel 631: fixing plate 632: blade 64: air volume adjustment plate 641: opening area 642: blocking area 65: indicator 7: magnetic resistance unit 71: guide plate 711: guide plate track 72: metal ring 73: magnetic seat 730: magnetic area 731: seat body 732: magnetic part

[0038] 733: pivot point 734: magnetic seat track 735: first end 736: second end 737: turning part 74: guide column 75: connecting rod I: flow channel L: axis X: front-to-back direction DETAILED DESCRIPTION

[0039] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0040] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0041] Before the present invention is described in detail, it should be noted that in the following description, the front-back direction X is based on the direction viewed by the trainee.

[0042] See also Figures 1 to 5 A resistance device for a fitness machine, the resistance device 500 is used to generate multi-stage exercise resistance to expand the resistance adjustment range and improve exercise intensity. The resistance device 500 includes a wind resistance unit 6 for generating wind resistance and a magnetic resistance unit 7 for generating magnetic resistance.

[0043] See also Figures 2 to 4 The wind resistance unit 6 is substantially drum-shaped and includes a housing 61, a rotating shaft 62, a wind wheel 63, an air volume adjustment disk 64, and an indicator 65. The housing 61 has a bottom cover 611, an outer cover 612 detachably mounted on the bottom cover 611, and a protective cover 613. Preferably, the outer cover 612 has a plurality of air inlet areas 614 and a plurality of shielding areas 615. Each air inlet area 614 is a hollow structure and is used for air inflow, and each shielding area 615 is a solid structure and is used to block air inflow. The protective cover 613 is covered on the outer cover 612 and is used to prevent dust and has the function of appearance modification.

[0044] The rotating shaft 62 extends along the axis L and is rotatably mounted on the bottom cover 611. The wind wheel 63 is sleeved on the rotating shaft 62 and is fixedly connected to the rotating shaft 62. The wind wheel 63 is driven by the rotating shaft 62 to rotate relative to the housing 61 and generate wind resistance. The wind wheel 63 has a fixing plate 631 through which the rotating shaft 62 is fixedly connected and a plurality of blades 632 arranged at intervals along the circumferential direction and disposed on the fixing plate 631.

[0045] The air volume adjustment plate 64 is rotatably connected to the outer cover 612 and can rotate relative to the housing 61. The air volume adjustment plate 64 cooperates with the outer cover 612 to define a flow channel I for air to flow in. Preferably, the air volume adjustment plate 64 has a plurality of opening areas 641 for air to flow in and a plurality of blocking areas 642 for blocking air to flow in. Each opening area 641 is a hollow structure, and each blocking area 642 is a solid structure. The opening areas 641, the blocking areas 642, the air inlet areas 614, and the shielding areas 615 cooperate with each other to define the flow channel I. By rotating the air volume adjustment plate 64 to adjust the flow rate of the flow channel I, a wind resistance from low to high can be generated.

[0046] The indicator 65 is fixed to the air volume adjustment disk 64 and exposed from a slot 616 of the outer cover 612 of the shell 61. The shell 61 is engraved with numbers of resistance stages (not shown). The indicator 65 can slide in the slot 616 and rotate relative to the outer cover 612 as the air volume adjustment disk 64 rotates, thereby indicating the resistance stages for the trainee to visually distinguish.

[0047] The magnetic resistance unit 7 is adjustably disposed in the housing 61 of the wind resistance unit 6 . The magnetic resistance unit 7 includes a guide plate 71 , a metal ring 72 , two magnetic seats 73 and two guide posts 74 .

[0048] The guide plate 71 and the outer cover 612 are located on both sides of the air volume adjustment plate 64. The guide plate 71 is substantially in the shape of a circular disk and surrounds the axis L. The guide plate 71 is fixedly connected to the outer cover 612 through several connecting rods 75 that pass through the opening areas 641 of the air volume adjustment plate 64. The guide plate 71 is made of a material that magnets will not adsorb (such as plastic or aluminum). The guide plate 71 has two guide plate tracks 711. Preferably, these guide plate tracks 711 are respectively an arc-shaped slot and are symmetrically arranged with the axis L as the center. The metal ring piece 72 is elevated and fixed to the fixing plate 631 of the wind wheel 63. The metal ring piece 72 in this embodiment is made of aluminum, but other metals that can generate eddy currents such as iron and copper can also be used. The metal ring piece 72 is substantially in the shape of a circular ring and surrounds the axis L and rotates with the wind wheel 63. Preferably, the projection of the metal ring piece 72 on the axis L is located outside the guide plate 71. More preferably, the metal ring piece 72 is coaxial with the guide plate 71 and the air volume adjustment plate 64, and the metal ring piece 72 is located between the fixing plate 631 and the guide plate 71. In other variations, the metal ring piece 72 can also be eccentrically set or located between the air volume adjustment plate 64 and the guide plate 71.

[0049] Further reading Figures 3 to 5 The magnetic seats 73 are magnetic and are used to generate magnetic resistance with the metal ring 72. The present embodiment has two magnetic seats 73, but in other variations, the number of the magnetic seats 73 can be one or more than three, and the number of the magnetic seats 73 can be changed according to the magnetic force requirements. The magnetic seats 73 are symmetrically arranged around the axis L and are pivotally disposed on the guide plate 71. The position of the magnetic seats 73 on the axis L is between the guide plate 71 and the metal ring 72. Each magnetic seat 73 has a seat body 731 pivoted to the guide plate 71, and two magnetic members 732 disposed on the seat body 731. The seat body 731 has a pivot point 733 pivoted to the guide plate 71, and a magnetic seat track 734. The magnetic seat track 734 is a slotted and has a first end 735 adjacent to the pivot point 733, a second end 736 opposite to the first end 735, and a turning portion 737 between the first end 735 and the second end 736. The magnetic members 732 are away from the pivot point 733 and form a magnetic region 730 for generating magnetic resistance with the metal ring 72. The magnetic seat track 734 extends from the pivot point 733 toward the magnetic region 730, and the magnetic seat track 734 is bent near the magnetic region 730. In this embodiment, each magnetic member 732 is a circular magnet and is disposed on a side of the base 731 adjacent to the bottom cover 611 . In other variations, these magnetic members 732 can also be a block magnet and be spliced ​​and combined with the base 731 to have the magnetic area 730 .

[0050] These guide pillars 74 are matched with the number of these guide disk rails 711 and these magnetic seats 73. One end of each guide pillar 74 is connected to the air volume adjustment disk 64, and the other end of each guide pillar 74 passes through the respective guide disk rail 711 and extends into the corresponding magnetic seat rail 734. Therefore, each guide pillar 74 can move simultaneously in the respective magnetic seat rail 734 and the corresponding guide disk rail 711 as the air volume adjustment disk 64 rotates, thereby driving the respective magnetic seats 73 to pivot relative to the guide rail disk 71 with the pivot point 733 as the center, so that the projection of each magnetic seat 73 gradually overlaps with the metal ring piece 72, and since the metal ring piece 72 has relative movement with these magnetic seats 73 as the wind wheel 63 continues to rotate, the magnetic flux will change on the surface of the metal ring piece 72 to generate eddy current and generate magnetic resistance.

[0051] See also Figure 2 and Figure 5 When the indicator 65 points to the position with the lowest resistance section, the flow channel I (see Figure 3 ) has the smallest flow rate, the wind wheel 63 drives the metal ring piece 72 to rotate relative to the housing 61, the air volume adjustment plate 64, the guide plate 71 and the magnetic seats 73, and the wind resistance generated is minimal. When the guide posts 74 are located at the second ends 736 of the magnetic seat tracks 734, the projections of the magnetic parts 732 do not fall within the range of the metal ring piece 72, and the magnetic resistance unit 7 does not generate magnetic resistance at this time.

[0052] See also Figure 6 and Figure 7 , rotate the air volume adjustment disk 64 (see Figure 2 ), the indicator 65 moves and points to the middle position of the resistance section. At this time, the flow rate of the flow channel I increases, and the wind resistance increases. At the same time, the guide pillars 74 are driven from the second ends 736 through the turning parts 737, and the magnetic seats 73 are pushed to a part where the projections of the magnetic members 732 overlap with the metal ring piece 72. As the metal ring piece 72 rotates, the magnetic resistance unit 7 begins to generate magnetic resistance.

[0053] See also Figure 8 and Fig. 9 , continue to rotate the air volume adjustment disk 64 until the indicator 65 points to the position with the highest resistance segment. At this time, the flow rate and wind resistance of the flow channel I are the largest, and when the guide pillars 74 are driven to move from the turning parts 737 to the first ends 735, the magnetic seats 73 are pushed until the projections of the magnetic parts 732 completely overlap with the metal ring piece 72, so that the magnetic resistance of the magnetic resistance unit 7 reaches the maximum value.

[0054] The present invention uses the guide pillars 74 to drive the magnetic seats 73 to pivot, so that the magnetic resistance of the magnetic resistance unit 7 gradually increases from the second ends 736 toward the first ends 735, and adjusts the wind resistance and magnetic resistance at the same time, which is convenient for resistance adjustment and increases the adjustment range of resistance.

[0055] Thus, when the trainer selects the lowest resistance level, the guide posts 74 are located at the second ends 736, and the resistance device 500 only generates the minimum wind resistance, and no magnetic resistance is generated. As the resistance level is increased, the guide posts 74 slide from the second ends 736 and pass through the transition portions 737, respectively, and the wind resistance increases and the resistance device 500 generates magnetic resistance at the same time. When the guide posts 74 move to the first ends 735, the wind resistance and magnetic resistance reach the maximum at the same time, the resistance level is the highest, and the exercise intensity is the highest. Therefore, the trainer can adjust the wind resistance and magnetic resistance synchronously by rotating the air volume adjustment disk 64, and can increase the exercise resistance and improve the training effect without two operations. It is more convenient to use and can indeed achieve the purpose of the present invention.

[0056] It is understood that the guide posts 74 referred to in the first embodiment as being located at the second ends 736 of the magnetic base tracks 734 should be understood to be adjacent to or close to the second ends 736 in actual situations, and it is not limited that the two guide posts 74 must be simultaneously and completely located at the second ends 736. In addition, in other variations, the number of resistance sections at which magnetic resistance begins to be generated can be changed by slightly changing the shape, size or orientation of the magnetic base tracks 734, and it is not limited to the middle resistance section at which magnetic resistance begins to be generated.

[0057] See also Fig.10 The first embodiment of the fitness machine 1 of the present invention is a flywheel fitness bike, which includes a frame unit 10, a force application group 20, an armrest 30, a saddle 40, and a resistance device 500.

[0058] The frame unit 10 extends along the front-to-back direction X. The force applying group 20 is two pedals and is operably disposed at the rear end of the frame unit 10 and is used for the trainee's feet to step on. The handrail 30 is disposed at the front end of the frame unit 10 and is used for the trainee to hold the hand. The saddle 40 is disposed on the frame unit 10 and is used for the trainee to sit on.

[0059] The resistance device 500 is installed at the front end of the frame unit 10 and is connected to the force applying group 20 through a sprocket chain group (not shown). The resistance device 500 is used to generate resistance to the force applying group 20 .

[0060] See also Fig.11 The second embodiment of the present invention is similar to the first embodiment, except that:

[0061] The fitness machine 1' is a rowing machine, and includes a frame unit 10', a force applying group 20' disposed on the frame unit 10', a saddle 40' for sitting, and the resistance device 500. The trainee sits on the saddle 40' and applies force to the force applying group 20' with both hands. Through the resistance device 500, various rowing situations can be simulated. In addition to training the abdomen, the lower body can also drive the core muscle group and the upper body muscle group to improve the exercise effect.

[0062] See also Fig.12 The third embodiment of the present invention is similar to the first embodiment, except that:

[0063] The fitness machine 1" is a ski machine and includes a frame unit 10", a force application group 20" disposed on the frame unit 10", and the resistance device 500. During the training process, the lower limbs need to stand stably and use both hands to apply force to the force application group 20", and various ski slopes are simulated through the resistance device 500, which can strengthen the training of the upper limbs including triceps, back and core.

[0064] Therefore, the resistance device 500 of the present invention can be applied to a flywheel exercise bike, a rowing machine, a ski machine, an upright exercise bike, a horizontal exercise bike, a sliding stepper, an elliptical machine or other types of resistance exercise equipment, but is not limited thereto.

[0065] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A resistance device for a fitness machine, characterized in that: It includes a wind resistance unit and a magnetic resistance unit; The wind resistance unit includes a housing, a wind wheel, a rotating shaft and an air volume adjustment plate. The wind wheel and the air volume adjustment plate are installed in the housing. The wind wheel is fixedly connected to the rotating shaft and can rotate relative to the housing around the axis of the rotating shaft. The air volume adjustment plate can rotate relative to the housing and cooperate with the housing to define a flow channel for air flow. The flow rate of the flow channel can be adjusted by rotating the air volume adjustment plate. The magnetic resistance unit is adjustably arranged in the wind resistance unit, and the magnetic resistance unit includes: A guide plate, surrounding the axis of the rotating shaft and fixedly connected to the housing, the guide plate having at least one guide plate track; A metal ring, surrounding the axis of the rotating shaft and rotating with the wind wheel; At least one magnetic seat, which has magnetism and is used to generate magnetic resistance with the metal ring, and the magnetic seat is pivotally disposed on the guide plate and has a magnetic seat track; At least one guide post is connected to the air volume regulating disk and passes through the guide disk track and extends into the magnetic base track. The guide post can move in the magnetic base track as the air volume regulating disk rotates to drive the magnetic base to pivot relative to the guide track disk to adjust the relative position between the magnetic base and the metal ring sheet so as to adjust the magnetic resistance.

2. The resistance device of the fitness machine according to claim 1, characterized in that: The magnetic seat track has a first end, a second end opposite to the first end, and a turning portion located between the first end and the second end; when the guide column is located at the second end, the resistance device of the fitness machine only generates wind resistance, and when the guide column slides from the second end and passes through the turning portion, the resistance device of the fitness machine simultaneously generates wind resistance and magnetic resistance.

3. The resistance device of the fitness machine according to claim 2, characterized in that: The magnetic base also has a pivot point pivotally connected to the guide rail plate, and a magnetic area away from the pivot point and used to generate magnetic resistance with the metal ring. The magnetic base track extends from the pivot point toward the magnetic area, and the magnetic base track is bent near the magnetic area. The magnetic resistance generated by the guide post sliding to the first end is greater than the magnetic resistance generated by the guide post sliding to the second end.

4. The resistance device of the fitness machine as claimed in claim 3, characterized in that: The at least one magnetic seat has a seat body pivotally connected to the guide rail plate, and at least one magnetic component arranged on the seat body, the seat body has the magnetic seat track, and the magnetic component forms the magnetic area. When the guide post is located at the first end, the projection of the magnetic component overlaps with the metal ring sheet; when the guide post is located at the second end of the magnetic seat track, the projection of the magnetic component does not fall within the range of the metal ring sheet.

5. The resistance device of the fitness machine according to claim 1, characterized in that: The magnetic resistance unit includes two magnetic seats and two guide pillars. The magnetic seats are symmetrically arranged with the axis of the rotating shaft as the center.

6. The resistance device of the fitness machine according to claim 5, characterized in that: Each magnetic seat has a seat body pivotally connected to the guide plate, and at least one magnetic component arranged on the seat body.

7. The resistance device of the fitness machine according to claim 1, characterized in that: The magnetic seat is located between the guide plate and the metal ring sheet on the axis of the rotating shaft.

8. The resistance device of the fitness machine according to claim 1, characterized in that: The wind resistance unit also includes an indicator fixed to the air volume adjustment plate, the indicator is exposed from the shell and is used to mark the resistance stage number.

9. The resistance device of the fitness machine according to claim 1, characterized in that: The metal ring piece is in the shape of a circular ring, the guide rail disc is in the shape of a circular disc, and the central axis of the metal ring piece overlaps with the central axis of the guide rail disc.

10. A fitness machine, comprising: One rack unit; a force applying assembly operably disposed on the frame unit; and A resistance device for a fitness machine as claimed in any one of claims 1 to 9, used to generate resistance and mounted on the frame unit and connected to the force application group.

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