Fitness equipment

Abstract

The utility model discloses fitness equipment, and relates to the technical field of fitness equipment, the fitness equipment comprises a support, a flywheel assembly, a magnetic ring, a sensor and a circuit board, the flywheel assembly is installed on the support through a rotating shaft, the rotating shaft is sleeved with the magnetic ring, and the magnetic ring rotates along with the rotating shaft; the sensor is connected to the bracket, corresponds to the magnetic ring and is used for detecting the magnetic field intensity of the magnetic ring; the circuit board is fixed to the support. The sensor is electrically connected to the circuit board. According to the technical scheme of the utility model, the magnetic ring is sleeved on the rotating shaft of the re-fitness equipment, which coaxially rotates with the flywheel assembly, the sensor is arranged corresponding to the magnetic ring, and the rotating angle and the instantaneous speed of the magnetic ring are judged by using the magnetic induction intensity measured by the sensor, so that the rotating angle and the instantaneous speed of the flywheel assembly are obtained; therefore, the motion state of the user is judged, the resistance of the fitness equipment is adjusted in real time according to the motion state of the user, and intelligent motion services are provided for the user.

Description

Technical Field

[0001] The utility model relates to the technical field of fitness equipment, in particular to a fitness device. Background Art

[0002] Now more and more people go to professional fitness places (such as gyms, fitness studios, etc.) to exercise and exercise. At present, most of the fitness equipment configured in professional fitness places are intelligent equipment, which can detect the user's exercise status.

[0003] The resistance of current fitness equipment is generally set to a fixed value and cannot be adjusted, which makes the exercise mode relatively simple and does not achieve the best exercise effect. If the resistance of fitness equipment is to be adjusted, more accurate data about the user's exercise status needs to be measured, but current fitness equipment cannot measure more accurate data. Utility Model Content

[0004] The main purpose of the utility model is to provide a fitness device, which is intended to measure more accurate data about the user's exercise conditions.

[0005] To achieve the above-mentioned purpose, the fitness equipment proposed by the utility model includes:

[0006] Bracket;

[0007] A flywheel assembly is mounted on the bracket via a rotating shaft;

[0008] A magnetic ring, sleeved on the rotating shaft, the magnetic ring and the rotating shaft rotate synchronously;

[0009] A sensor connected to the bracket, the sensor corresponding to the magnetic ring, and used to detect the magnetic field strength of the magnetic ring;

[0010] A circuit board is fixed to the bracket, and the sensor is electrically connected to the circuit board.

[0011] In one embodiment, the sensor corresponds to the outer circumference of the magnetic ring.

[0012] In one embodiment, the magnetic ring includes N-pole segments and S-pole segments alternately arranged in the circumferential direction of the magnetic ring.

[0013] In one embodiment, the orthographic projection of the magnetic ring on a plane perpendicular to the sensor is located in the middle of the sensor.

[0014] In one embodiment, the flywheel assembly includes a driving wheel and a driven wheel that are transmission-connected, the rotating shaft includes a first rotating shaft and a second rotating shaft, the driving wheel and the driven wheel are respectively installed on the bracket through the first rotating shaft and the second rotating shaft, and the magnetic ring is sleeved on the first rotating shaft or the magnetic ring is sleeved on the second rotating shaft.

[0015] In one embodiment, when the magnetic ring is sleeved on the first rotating shaft, the magnetic ring and the driving wheel are respectively located on opposite sides of the bracket; when the magnetic ring is sleeved on the second rotating shaft, the magnetic ring and the driven wheel are respectively located on opposite sides of the bracket.

[0016] In one embodiment, when the magnetic ring is sleeved on the first rotating shaft, a bearing for the first rotating shaft to pass through is installed on the bracket, and the magnetic ring is arranged at an interval from the bearing.

[0017] In one embodiment, a mounting bracket is arranged on the bracket, and the sensor is fixed to the mounting bracket.

[0018] In one embodiment, the mounting bracket includes a fixed section, a connecting section and a bending section. The fixed section and the connecting section are connected by the bending section. The fixed section is fixed to the bracket, the sensor is installed on the connecting section, and the bending section is bent to avoid the bearing.

[0019] In one embodiment, the sensor is configured as a magnetoresistive sensor or a Hall effect sensor.

[0020] The technical solution of the present utility model is that a magnetic ring is sleeved on a rotating shaft that rotates coaxially with the flywheel assembly of the fitness equipment, a sensor is arranged corresponding to the magnetic ring, and the rotation angle and instantaneous speed of the magnetic ring are judged by the magnetic induction intensity measured by the sensor, so as to obtain the rotation angle and instantaneous speed of the flywheel assembly, thereby judging the user's motion state, and adjusting the resistance of the fitness equipment in real time according to the user's motion state to provide an intelligent motion service for the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0022] Figure 1 It is a schematic structural diagram of the fitness equipment provided by the present utility model from a perspective;

[0023] Figure 2 For Figure 1 The partial enlarged view at A in;

[0024] Figure 3 For Figure 2 The partial enlarged view at B in;

[0025] Figure 4 Structural schematic diagram of the fitness equipment provided by the present utility model from another perspective;

[0026] Figure 5 is Figure 4 partial enlarged view at C in

[0027] Figure 6 Magnetization method of the magnetic ring in one embodiment.

[0028] Explanation of the reference numerals in the drawings:

[0029] 100, fitness equipment; 1, bracket; 2, flywheel assembly; 21, driving wheel; 22, driven wheel; 23, rotating shaft; 231, first rotating shaft; 232, second rotating shaft; 24, foot pedal assembly; 241, crank; 242, pedal; 3, magnetic ring; 4, sensor; 5, circuit board; 6, generator; 7, mounting bracket; 71, fixed section; 72, connecting section; 73, bending section; 8, bearing.

[0030] The realization, functional features and advantages of the purpose of the present utility model will be further described in conjunction with the embodiments and with reference to the accompanying drawings. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0032] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, such descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0034] Nowadays, more and more people go to professional fitness venues (such as gyms, fitness studios, etc.) for exercise and fitness. Currently, most of the fitness equipment configured in professional fitness venues is intelligent equipment, and the intelligent equipment can detect the exercise situation of users.

[0035] The resistance of current fitness equipment is generally set to a fixed value and cannot be adjusted, making the exercise mode relatively single and unable to achieve a better exercise effect. If you want to adjust the resistance of the fitness equipment, you need to obtain more accurate data about the user's exercise situation, but current fitness equipment cannot obtain more accurate data.

[0036] In view of this, the present utility model proposes a fitness equipment 100.

[0037] The fitness equipment 100 can be an elliptical trainer, a spinning bike, a mountain climber, a treadmill, etc., and is not specifically limited herein.

[0038] Please refer to Figure 2 and Figure 3 , in an embodiment of the present utility model, the fitness equipment 100 includes a bracket 1, a flywheel assembly 2, a magnetic ring 3, a sensor 4, and a circuit board 5. The flywheel assembly 2 is installed on the bracket 1 through a rotating shaft 23. The magnetic ring 3 is sleeved on the rotating shaft 23, and the magnetic ring 3 rotates synchronously with the rotating shaft 23. The sensor 4 is connected to the bracket 1, the sensor 4 corresponds to the magnetic ring 3, and is used to detect the magnetic field strength of the magnetic ring 3. The circuit board 5 is fixed to the bracket 1, and the sensor 4 is electrically connected to the circuit board 5.

[0039] Specifically, the bracket 1 is the basic support structure of the fitness device 100, which is used to support the seat cushion, the handle, and other components of the fitness device 100. In this embodiment, the bracket 1 is also used to fix the flywheel assembly 2. Generally, considering that the bracket 1 needs to support the user's movement on the seat cushion, for this reason, the bracket 1 is made of metal. The bracket 1 can be made of iron or steel, and no specific limitation is made here. Among them, the circuit board 5 is installed on the base of the bracket 1.

[0040] Secondly, the flywheel assembly 2 is a transmission assembly within the bracket 1. The flywheel assembly 2 can rotate relative to the bracket 1 by the driving force provided by the user. The user can provide the driving force through a pulling device or a pushing device, or the user can also provide the driving force through a foot pedal device. One rotatable wheel body can be provided in the flywheel assembly 2, or multiple rotatable wheel bodies can be provided. The multiple rotatable wheel bodies can rotate separately or synchronously, and no specific limitation is made here.

[0041] It should be noted that the flywheel assembly 2 is installed on the bracket 1 through the rotating shaft 23. It can be that the flywheel assembly 2 is fixedly connected to the rotating shaft 23, and the rotating shaft 23 is rotatably connected to the bracket 1. In this embodiment, a magnetic ring 3 is sleeved on the rotating shaft 23. Therefore, when the rotating shaft 23 rotates relative to the bracket 1, the magnetic ring 3 will be driven to rotate together. A sensor 4 is provided corresponding to the magnetic ring 3, and this sensor 4 is used to detect the change of the magnetic field around the magnetic ring 3. It should be noted that during the rotation of the magnetic ring 3 following the rotating shaft 23, the magnetic field around the magnetic ring 3 will change periodically, and different magnetic field intensities measured by the sensor 4 can obtain the rotation angle of the magnetic ring 3.

[0042] Considering that if the magnetic ring 3 is only sleeved on the rotating shaft 23, when the magnetic ring 3 and the rotating shaft 23 rotate synchronously, a strong frictional force will be generated between the magnetic ring 3 and the rotating shaft 23, which may wear the magnetic ring 3, resulting in an increase in the inner diameter of the magnetic ring 3, and finally the magnetic ring 3 can no longer rotate synchronously with the rotating shaft 23. Therefore, generally, after the magnetic ring 3 is sleeved on the rotating shaft 23, the two are fixedly connected. The fixed connection method can be to heat-melt the contact surfaces between the magnetic ring 3 and the rotating shaft 23 together.

[0043] In the background art, a magnetic component can be disposed on the flywheel assembly, and the rotation of the flywheel assembly is used as a switch to control the magnetic flux. In this way, along with the change of the output voltage of the Hall integrated circuit, the energy saving indicates a certain position of the flywheel assembly. When the flywheel assembly rotates, the magnetic component on the flywheel assembly can be driven to rotate together. The sensor is disposed on one side of the flywheel assembly, and the position of the magnetic component relative to the Hall sensor changes continuously. Furthermore, the magnetic field intensity detected at the sensor changes accordingly. The position corresponding to the sensor at this time is used as a critical point. When the magnetic field intensity detected by the sensor is the same as the magnetic field intensity at the start of the rotation of the flywheel assembly, it means that the flywheel assembly has just rotated one circle. Furthermore, the time taken for the flywheel assembly to rotate one circle and the speed of the flywheel assembly rotating one circle can be measured by this method. The position of a certain part of the flywheel assembly can also be obtained according to the position where the magnetic component is disposed.

[0044] The basic rotational speed measurement requirements of the flywheel assembly can be met by the above method. However, it is difficult to achieve further obtaining the instantaneous speed of the flywheel assembly or the average rotational speed within a short period of time only by the above method.

[0045] In view of this, in the present utility model, the magnetic component is replaced by a magnetic ring 3, so that the sensor 4 can measure an obvious and periodically changing magnetic field, rather than a magnetic field that periodically appears or disappears. The angle and time of the rotation of the magnetic ring 3 are measured by the sensor 4, and further, the instantaneous speed and the average speed within a short period of time of the flywheel assembly 2 can be measured. The sensor 4 in this embodiment can be a Hall effect sensor or a magnetoresistive sensor, and no specific limitation is made here.

[0046] The fitness device 100 can judge the rotation angle of the flywheel assembly 2 and the instantaneous speed of the flywheel assembly 2 according to different magnetic field intensities of the magnetic ring 3, thereby predicting the time required for the flywheel assembly 2 to rotate any further angle, and thus judging the real-time motion state of the user. When the motion state of the user is good, the resistance of the fitness device 100 is increased. When the motion state of the user is poor, the resistance of the fitness device 100 is reduced, providing an intelligent motion service for the user.

[0047] The technical solution of the present utility model is that a magnetic ring 3 is sleeved on a rotating shaft 23 that rotates coaxially with the flywheel assembly 2 of the fitness device 100, a sensor 4 is disposed corresponding to the magnetic ring 3, and the rotation angle and the instantaneous speed of the magnetic ring 3 are judged by the magnetic induction intensity measured by the sensor 4, so as to obtain the rotation angle and the instantaneous speed of the flywheel assembly 2, and thus judge the motion state of the user, and the resistance of the fitness device 100 is adjusted in real time according to the motion state of the user to provide an intelligent motion service for the user.

[0048] In one embodiment, please refer to Figure 3 and Figure 5, the sensor 4 corresponds to the outer circumference of the magnetic ring 3.

[0049] Specifically, the sensor 4 can measure the change of the magnetic field and convert it into an electrical signal, which can be further processed to determine the position or rotation state of the object. When the sensor 4 corresponds to the periphery of the magnetic ring 3, it can capture more subtle and accurate changes in the magnetic field, thereby generating a more accurate signal. The magnetic field of the magnetic ring 3 is more evenly distributed and easy to predict at the periphery, which facilitates accurate measurement by the sensor 4.

[0050] In one embodiment, see Figure 6 The magnetic ring 3 includes N pole segments and S pole segments alternately arranged in the circumferential direction of the magnetic ring 3.

[0051] It should be noted that the magnetic ring 3 includes N-pole segments and S-pole segments alternately arranged in the circumferential direction of the magnetic ring 3. Figure 6 It is only an optional embodiment of the present embodiment. The magnetic ring 3 is divided into six pole segments in the circumferential direction, and the S pole segments and the N pole segments are arranged alternately. Of course, the magnetic ring 3 can also be divided into two pole segments, or it can be divided into four or more even-numbered pole segments. In addition, the magnetic ring 3 can be divided into an inner ring and an outer ring, and only the inner ring can be magnetized, or only the outer ring can be magnetized. Other magnetization methods that can satisfy the requirement of setting the sensor 4 on the periphery of the magnetic ring 3 and can obviously detect the change in the magnetic field strength of the magnetic ring 3 can be used for the magnetic ring 3 in the above embodiment.

[0052] In one embodiment, please continue to refer to Figure 3 and Figure 5 , the orthographic projection of the magnetic ring 3 perpendicular to the sensor 4 is located in the middle of the sensor 4 .

[0053] It should be noted that the orthographic projection on the sensor 4 is located in the middle of the sensor 4, which helps to enhance the stability of the sensor 4. Considering that in actual application, the magnetic ring 3 or the encoder may be subject to various external interferences (such as vibration, impact, etc.). By optimizing the corresponding relationship between the sensor 4 and the magnetic ring 3, the influence of these interferences on the measurement results can be reduced, and more stable magnetic field strength information can be measured, thereby obtaining more accurate instantaneous speed information of the flywheel assembly 2, which is convenient for real-time adjustment of the resistance of the fitness equipment 100.

[0054] In one embodiment, see Figure 2 The flywheel assembly 2 includes a driving wheel 21 and a driven wheel 22 that are transmission-connected, the rotating shaft 23 includes a first rotating shaft 231 and a second rotating shaft 232, the driving wheel 21 and the driven wheel 22 are respectively installed on the bracket 1 through the first rotating shaft 231 and the second rotating shaft 232, and the magnetic ring 3 is sleeved on the first rotating shaft 231 or the magnetic ring 3 is sleeved on the second rotating shaft 232.

[0055] Specifically, the flywheel assembly 2 includes a driving wheel 21 and a driven wheel 22 that are drivingly connected. The rotating shaft 23 includes a first rotating shaft 231 and a second rotating shaft 232. The first rotating shaft 231 is used to rotatably connect the driving wheel 21 to the bracket 1, and the second rotating shaft 232 is used to rotatably connect the driven wheel 22 to the bracket 1. Moreover, the driving wheel 21 and the driven wheel 22 are drivingly connected, and by driving the rotation of the driving wheel 21, the rotation of the driven wheel 22 is driven. The transmission method can be belt-tooth transmission, chain transmission, or gear meshing transmission. The transmission method between the driving wheel 21 and the driven wheel 22 can be any one of the above transmission methods.

[0056] In the above embodiment, the magnetic ring 3 is sleeved on the rotating shaft 23 of the flywheel assembly 2. Therefore, the magnetic ring 3 can be sleeved on the first rotating shaft 231. At this time, the sensor 4 corresponds to the magnetic ring 3 sleeved on the first rotating shaft 231; the magnetic ring 3 can also be sleeved on the second rotating shaft 232. At this time, the sensor 4 corresponds to the magnetic ring 3 sleeved on the second rotating shaft 232. Considering the driving connection between the driving wheel 21 and the driven wheel 22, the magnetic ring 3 can rotate coaxially with the driving wheel 21, and the magnetic ring 3 can also rotate coaxially with the driven wheel 22. The above two embodiments are both optional embodiments of the present invention.

[0057] In one embodiment, please refer to Figure 2 , when the magnetic ring 3 is sleeved on the first rotating shaft 231, the magnetic ring 3 and the driving wheel 21 are respectively located on opposite sides of the bracket 1.

[0058] It should be noted that when the magnetic ring 3 is sleeved on the first rotating shaft 231, the driving wheel 21 has a certain thickness, and the outer diameter of the driving wheel 21 is relatively large. To facilitate the installation of the magnetic ring 3 and the sensor 4, the magnetic ring 3 and the driving wheel 21 are respectively arranged on opposite sides of the bracket 1. Therefore, the rotating shaft 23 extends from the bracket 1 towards both ends respectively.

[0059] In one embodiment, when the magnetic ring 3 is sleeved on the second rotating shaft 232, the magnetic ring 3 and the driven wheel 22 are respectively located on opposite sides of the bracket 1.

[0060] It should be noted that when the magnetic ring 3 is sleeved on the second rotating shaft 232, the driven wheel 22 has a certain thickness, and the outer diameter of the driven wheel 22 is relatively large. To facilitate the installation of the magnetic ring 3 and the sensor 4, the magnetic ring 3 and the driven wheel 22 are respectively arranged on opposite sides of the bracket 1. Therefore, the rotating shaft 23 needs to extend from the bracket 1 towards both ends respectively.

[0061] In one embodiment, please refer to Figure 3 and Figure 5, when the magnetic ring 3 is sleeved on the first rotating shaft 231, a bearing 8 through which the first rotating shaft 231 passes is installed on the bracket 1, and the magnetic ring 3 and the bearing 8 are arranged at intervals.

[0062] Specifically, in order to reduce the friction between the first rotating shaft 231 and the bracket 1, a bearing 8 is arranged outside the first rotating shaft 231 to reduce the irreversible damage caused by the friction of the first rotating shaft 231. It should be noted that considering that the bearing 8 has a certain thickness, in order to avoid the bearing 8 interfering with the rotation of the magnetic ring 3, the magnetic ring 3 and the bearing 8 are arranged at intervals to ensure the normal rotation of the magnetic ring 3.

[0063] In one embodiment, please refer to Figure 2 , the fitness device 100 further includes a generator 6, and the driven wheel 22 is in transmission connection with the generator 6.

[0064] Specifically, it should be noted that a generator 6 is also provided in the fitness device 100. By continuously driving the driving wheel 21 to rotate, the driven wheel 22 can be driven to rotate, and then the generator 6 can be driven to rotate to cut the magnetic induction lines for power generation. The generated electricity is mainly used for this fitness bike to provide power for the internal resistance adjustment device, display device, and other electronic control modules of the fitness bike, thus saving electricity costs. Moreover, a storage battery is also provided in the fitness bike, and the excess electricity generated by the generator 6 can be stored in the storage battery and used to charge other devices.

[0065] In one embodiment, please refer to Figure 3 and Figure 5 , an installation frame 7 is arranged on the bracket 1, and the sensor 4 is fixed to the installation frame 7.

[0066] It should be noted that an installation frame 7 is also arranged on the bracket 1. The installation frame 7 is used to fix the sensor 4 so that the sensor 4 corresponds to the magnetic ring 3. The installation frame 7 includes a fixed section 71, a connecting section 72, and a bending section 73. The fixed section 71 and the connecting section 72 are connected by the bending section 73. Of course, the installation frame 7 can also be integrally formed. The fixed section 71 is used to be fixed on the bracket 1, the connecting section 72 is used to install the sensor 4, and the bending section 73 is used to avoid the bearing 8 so that the sensor 4 installed on the connecting section 72 just corresponds to the magnetic ring 3, so that the sensor 4 can better measure the change in the magnetic induction intensity of the magnetic ring 3.

[0067] In one embodiment, please refer to Figure 2, the flywheel assembly 2 further includes a pedal assembly 24, the pedal assembly 24 includes a crank 241 and a pedal 242, one end of the crank 241 is connected to the middle of the driving wheel 21, the other end of the crank 241 is connected to the pedal 242, and the pedal 242 rotates circumferentially along the driving wheel 21 to drive the driving wheel 21 to rotate.

[0068] It should be noted that, further, when the fitness device 100 is configured as a spinning bike, the driving device of the flywheel assembly 2 is the pedal assembly 24, wherein the pedal assemblies 24 are arranged in pairs. The pedal assembly 24 includes a connected crank 241 and pedal 242, and the crank 241 and the pedal 242 can be rotatably connected or fixedly connected. In this embodiment, the pedal assemblies 24 are arranged in pairs, so a pair of pedal assemblies 24 includes two cranks 241 and two pedals 242, and the two sets of cranks 241 and pedals 242 are respectively arranged on opposite sides of the driving wheel 21. Specifically, in this embodiment, the crank 241 and the pedal 242 are rotatably connected through a rotating shaft. The user of the fitness device 100 can drive the crank 241 to rotate by applying a driving force to the pedal 242. Considering that the crank 241 and the driving wheel 21 are fixedly connected, the driving wheel 21 can be driven to rotate together with the crank 241.

[0069] In one embodiment, please refer to Figure 3 and Figure 5 , the sensor 4 is configured as a magnetoresistive sensor or a Hall effect sensor.

[0070] It should be noted that the Hall effect sensor uses the Hall effect to detect changes in the magnetic field. When a current passes perpendicularly through a semiconductor in an external magnetic field, an additional electric field will be generated in the direction perpendicular to the current and the magnetic field, thereby generating a potential difference at both ends of the semiconductor. This potential difference is proportional to the magnetic field strength. Therefore, the change in the magnetic field strength can be detected through the potential difference. The magnetoresistive sensor works based on the magnetoresistive effect. When an external magnetic field perpendicular to the current is applied to a semiconductor material through which a current is passed, its resistance value will increase. This change in the resistance value is related to the magnetic field strength. Therefore, the change in the magnetic field can be detected by measuring the resistance value.

[0071] The Hall effect sensor and the magnetoresistive sensor each have their own advantages in sensing the change in the magnetic field strength of the magnetic ring 3. The Hall effect sensor is excellent in fast response with its high sensitivity and stability; while the magnetoresistive sensor has outstanding performance in the field of precision measurement and control with its high precision and high resolution.

[0072] The above are only exemplary embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included within the patent protection scope of the present utility model.

Claims

1. A fitness device (100), characterized in that, include: Bracket (1); A flywheel assembly (2) is mounted on the bracket (1) via a rotating shaft (23); A magnetic ring (3) is sleeved on the rotating shaft (23), and the magnetic ring (3) rotates synchronously with the rotating shaft (23); A sensor (4) connected to the bracket (1), the sensor (4) corresponding to the magnetic ring (3) and used to detect the magnetic field strength of the magnetic ring (3); A circuit board (5) is fixed to the bracket (1), and the sensor (4) is electrically connected to the circuit board (5).

2. The fitness device (100) according to claim 1, wherein The sensor (4) corresponds to the outer circumference of the magnetic ring (3).

3. The fitness device (100) according to claim 2, characterized in that, The magnetic ring (3) comprises N-pole segments and S-pole segments which are alternately arranged in the circumferential direction of the magnetic ring (3).

4. The fitness device (100) according to claim 2, wherein, The orthographic projection of the magnetic ring (3) perpendicular to the sensor (4) is located in the middle of the sensor (4).

5. The fitness device (100) according to claim 2, characterized in that, The flywheel assembly (2) comprises a driving wheel (21) and a driven wheel (22) which are transmission-connected, the rotating shaft (23) comprises a first rotating shaft (231) and a second rotating shaft (232), the driving wheel (21) and the driven wheel (22) are respectively mounted on the bracket (1) via the first rotating shaft (231) and the second rotating shaft (232), and the magnetic ring (3) is sleeved on the first rotating shaft (231) or the magnetic ring (3) is sleeved on the second rotating shaft (232).

6. The fitness device (100) according to claim 5, characterized in that, When the magnetic ring (3) is sleeved on the first rotating shaft (231), the magnetic ring (3) and the driving wheel (21) are respectively located on two opposite sides of the bracket (1); when the magnetic ring (3) is sleeved on the second rotating shaft (232), the magnetic ring (3) and the driven wheel (22) are respectively located on two opposite sides of the bracket (1).

7. The fitness device (100) according to claim 5, characterized in that, When the magnetic ring (3) is sleeved on the first rotating shaft (231), a bearing (8) for the first rotating shaft (231) to pass through is installed on the bracket (1), and the magnetic ring (3) and the bearing (8) are spaced apart.

8. The fitness device (100) according to claim 7, wherein, The bracket (1) is provided with a mounting frame (7), and the sensor (4) is fixed to the mounting frame (7).

9. The fitness device (100) according to claim 8, wherein, The mounting frame (7) comprises a fixed section (71), a connecting section (72) and a bent section (73); the fixed section (71) and the connecting section (72) are connected via the bent section (73); the fixed section (71) is fixed to the bracket (1); the sensor (4) is mounted on the connecting section (72); and the bent section (73) is bent to avoid the bearing (8).

10. The fitness device (100) according to claim 1, characterized in that, The sensor (4) is configured as a magnetoresistive sensor (4) or a Hall effect sensor (4).

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