Resistance device and rowing machine

Abstract

The utility model discloses a resistance device and a rowing machine. The resistance device comprises a water resistance unit and a magnetic resistance unit. The water resistance unit comprises a water tank, a coil spring mechanism and a paddle mechanism, the water tank is provided with a water containing cavity and a water tank penetrating hole communicated with the water containing cavity, the coil spring mechanism is rotatably arranged in the water tank outside the water tank, and the paddle mechanism is rotatably arranged in the water containing cavity of the water tank. The water tank is provided with a water tank through hole, the paddle mechanism is connected to the coil spring mechanism through the water tank through hole, the magnetic resistance unit comprises a flywheel and an inner magnetic control mechanism, the flywheel is provided with a flywheel space, the inner magnetic control mechanism is suspended in the flywheel space of the flywheel, and the flywheel is linked with the paddle mechanism. When the paddle mechanism is driven to rotate in the water containing cavity of the water tank, the flywheel rotates relative to the inner magnetic control mechanism, so that the resistance device provides composite resistance to help a user to achieve a better fitness effect.

Description

Technical Field

[0001] The utility model relates to the field of fitness equipment, and particularly to a resistance device and a rowing machine. Background Art

[0002] With the increasing improvement of people's living standards, people's health awareness has gradually increased. Therefore, in recent years, fitness equipment has become popular, and among them, the rowing machine is one of the most popular types of fitness equipment. A rowing machine is a fitness equipment that simulates the operation of a water racing boat for fitness exercise. Its resistance device consists of a water tank and a paddle blade rotatably arranged in the water tank. When a user pulls the paddle blade to rotate, the water in the water tank provides resistance to help the user achieve the purpose of fitness. It can be understood that the resistance of the existing rowing machine is positively correlated with the amount of water in the water tank. When the amount of water in the water tank is large, the resistance of the rowing machine is large; when the amount of water in the water tank is small, the resistance of the rowing machine is small. Therefore, the existing rowing machine allows the resistance to be adjusted by adjusting the amount of water in the water tank. However, for the rowing machines arranged in the gym, within a short period of time, the rowing machines will be used by different people, and different people have different requirements for the resistance of the rowing machine. The existing resistance generation method of the rowing machine makes it inconvenient to adjust the resistance of the rowing machine. Summary of the Utility Model

[0003] An object of the utility model is to provide a resistance device and a rowing machine, wherein a water resistance unit of the resistance device provides water resistance, and a magnetic resistance unit of the resistance device provides magnetic resistance, so that the resistance device provides composite resistance to help the user achieve a better fitness effect.

[0004] An object of the utility model is to provide a resistance device and a rowing machine, wherein when the rowing machine is used by a user, the resistance of the resistance device can be conveniently adjusted to meet the fitness needs of the user.

[0005] An object of the utility model is to provide a resistance device and a rowing machine, wherein by adjusting the magnetic resistance of the magnetic resistance unit, the resistance of the resistance device can be adjusted. Compared with the existing rowing machine, the resistance of the resistance device of the utility model can be conveniently adjusted to meet the fitness needs of the user.

[0006] An object of the utility model is to provide a resistance device and a rowing machine, wherein a paddle mechanism of the water resistance unit and a flywheel of the magnetic resistance unit are coaxially assembled to simplify the structure of the resistance device and improve the stability of the rowing machine during use.

[0007] An object of the utility model is to provide a resistance device and a rowing machine, wherein the resistance device can generate electricity when providing resistance.

[0008] According to one aspect of the present utility model, the present utility model provides a resistance device, which comprises:

[0009] A water resistance unit, wherein the water resistance unit comprises a water tank, a spring winding mechanism and a paddle mechanism. The water tank has a water storage cavity and a water tank perforation communicating with the water storage cavity. The spring winding mechanism is rotatably arranged outside the water tank on the water tank. The paddle mechanism is rotatably arranged in the water storage cavity of the water tank, and the paddle mechanism is connected to the spring winding mechanism through the water tank perforation of the water tank; and

[0010] A magnetic resistance unit, wherein the magnetic resistance unit comprises a flywheel and an internal magnetic control mechanism. The flywheel has a flywheel space, and the internal magnetic control mechanism is suspended in the flywheel space of the flywheel. The flywheel and the paddle mechanism are linked, and while the paddle mechanism is driven to rotate in the water storage cavity of the water tank, the flywheel rotates relative to the internal magnetic control mechanism.

[0011] According to an embodiment of the present utility model, a connecting shaft of the spring winding mechanism extends into the water storage cavity through the water tank perforation of the water tank, and the paddle mechanism is installed on the connecting shaft of the spring winding mechanism, so that the paddle mechanism is connected to the spring winding mechanism through the water tank perforation of the water tank. The magnetic resistance unit comprises a flange and an assembly shaft. The flange is fixedly sleeved on one end of the assembly shaft. The other end of the assembly shaft respectively passes through a mechanism perforation of the internal magnetic control mechanism and a flywheel perforation of the flywheel, and the flywheel is rotatable relative to the assembly shaft. The flange and the assembly shaft cooperate with each other to suspend the internal magnetic control mechanism in the flywheel space of the flywheel. The flywheel is drivably connected to a driving disc of the spring winding mechanism. Thus, while the connecting shaft of the spring winding mechanism drives the paddle mechanism to rotate in the water storage cavity of the water tank, the driving disc of the spring winding mechanism drives the flywheel to rotate relative to the internal magnetic control mechanism.

[0012] According to an embodiment of the present utility model, the resistance device comprises a transmission belt, and opposite ends of the transmission belt are respectively sleeved on the flywheel and the driving disc of the spring winding mechanism.

[0013] According to an embodiment of the present utility model, the flywheel includes a flywheel body and a conductor. The flywheel body forms the flywheel space and the flywheel through hole. The conductor is disposed on the flywheel body and located in the flywheel space. Wherein the internal magnetic control mechanism includes a housing, a driving unit, a bent and extended swing arm, and at least one magnetic element. The driving unit is disposed in the housing. The swing arm has a swing arm pivot end and a swing arm driven end that are opposite to each other. The swing arm pivot end of the swing arm is rotatably mounted on the edge of the housing. The swing arm driven end of the swing arm is drivably connected to the driving unit. The magnetic element is disposed on the outer side of the swing arm. Wherein the internal magnetic control mechanism is suspended in the flywheel space of the flywheel with the magnetic element facing the conductor, and at least a part of the conductor is located in the magnetic field environment of the magnetic element.

[0014] According to an embodiment of the present utility model, the driving unit includes a driving motor, a transmission gear set, a sector gear, and a connecting rod. The driving motor is disposed in the housing. The sector gear is rotatably disposed in the housing. Each transmission gear in the transmission gear set is rotatably mounted in the housing in a manner that adjacent transmission gears mesh with each other. And one transmission gear in the transmission gear set is meshed with the worm of the driving motor, and another transmission gear is meshed with the sector gear. Opposite ends of the connecting rod are respectively rotatably mounted on the sector gear and the swing arm driven end of the swing arm.

[0015] According to an embodiment of the present utility model, the housing includes a first housing and a second housing. The first housing and the second housing are mutually installed to form an internal space and a peripheral opening communicating with the internal space between the first housing and the second housing. The driving motor, the transmission gear set, the sector gear, and the connecting rod are respectively located in the internal space of the housing. The magnetic element is adjacent to the peripheral opening of the housing. Wherein the housing has a housing through hole and a wire passing hole, and the housing through hole and the wire passing hole are respectively formed in the second housing, and both the housing through hole and the wire passing hole communicate with the internal space of the housing. Wherein the internal magnetic control mechanism includes a potentiometer, a circuit board, and a wire. The fixed part of the potentiometer is fixedly mounted on the second housing outside the housing. The rotating shaft of the potentiometer extends through the housing through hole of the housing to the internal space of the housing and is inserted into the insertion hole of the sector gear. The circuit board is located in the internal space of the housing. One end of the wire is connected to the circuit board, and the other end extends from the internal space of the housing to the outside through the wire passing hole of the housing and is connected to the fixed part of the potentiometer.

[0016] According to an embodiment of the present utility model, the second housing has a receiving groove and two elastic clamping arms, and the two elastic clamping arms are located on opposite sides of the receiving groove. After the fixed portion of the potentiometer is received in the receiving groove of the second housing, the two elastic clamping arms respectively clamp the fixed portion on opposite sides of the fixed portion.

[0017] According to an embodiment of the present utility model, the fixed portion of the potentiometer has a limiting groove, and the end of one of the two elastic clamping arms is located in the limiting groove of the fixed portion.

[0018] According to an embodiment of the present utility model, the resistance device includes a linkage shaft. The linkage shaft has a driven end and an assembly end that are opposite to each other. The middle part of the linkage shaft is rotatably assembled in the water tank through hole of the water tank. The assembly end of the linkage shaft extends into the water storage cavity of the water tank and is used for installing the paddle mechanism. The driven end of the linkage shaft is exposed outside the water tank and is used for installing the torsion spring mechanism, so that the paddle mechanism is connected to the torsion spring mechanism through the water tank through hole of the water tank. The flywheel has a flywheel through hole, and the internal magnetic control mechanism has a mechanism through hole. The linkage shaft respectively passes through the flywheel through hole of the flywheel and the mechanism through hole of the internal magnetic control mechanism, and the flywheel and the linkage shaft are fixed. There is a gap between the internal magnetic control mechanism and the linkage shaft, so that the linkage shaft is rotatable relative to the internal magnetic control mechanism.

[0019] According to an embodiment of the present utility model, the water tank has an assembly groove, and the magnetic resistance unit is located in the assembly groove of the water tank.

[0020] According to an embodiment of the present utility model, the resistance device includes a generator, and the rotor of the generator is drivably connected to the flywheel.

[0021] According to an embodiment of the present utility model, the resistance device includes a transmission belt, and opposite ends of the transmission belt are respectively sleeved on the rotor of the generator and the flywheel.

[0022] According to an embodiment of the present utility model, the resistance device includes an assembly frame. The assembly frame includes a top assembly part, and the top assembly part is located above the water tank. The internal magnetic control mechanism is fixedly installed on the top assembly part.

[0023] According to an embodiment of the present utility model, the flywheel includes a flywheel body and a conductor. The flywheel body forms the flywheel space and the flywheel perforation. The conductor is disposed on the flywheel body and located in the flywheel space. Wherein the internal magnetic control mechanism includes a housing, a driving unit, at least one swing arm, and at least one set of magnetic elements. The driving unit includes a driving wheel and at least one connecting element. The driving wheel is rotatably mounted on the housing. One end of the connecting element is rotatably mounted on the driving wheel. The swing arm has a swing arm pivot end and a swing arm driven end opposite to each other. The swing arm pivot end of the swing arm is rotatably mounted on the housing. The swing arm driven end of the swing arm and the other end of the connecting element are rotatably mounted. One set of the magnetic elements is disposed outside the swing arm. Wherein the internal magnetic control mechanism is suspended in the flywheel space of the flywheel with the magnetic elements facing the conductor, and at least a part of the conductor is located in the magnetic field environment of the magnetic elements.

[0024] According to an embodiment of the present utility model, the swing arm includes a swing arm body and at least one magnetic concentrating wall protruding from the side of the swing arm body. The magnetic elements are disposed on the swing arm body, and the magnetic concentrating wall shields at least a part of the side of the magnetic elements.

[0025] In another aspect of the present utility model, the present utility model further provides a rowing machine, which includes:

[0026] A rowing machine main body, wherein the rowing machine main body includes a frame and a seat slidably disposed on the frame;

[0027] A pulling device, wherein the pulling device includes a pulling belt and a handle disposed at one end of the pulling belt; and

[0028] A resistance device, wherein the resistance device includes a water resistance unit and a magnetic resistance unit. The water resistance unit includes a water tank, a spring winding mechanism, and a paddle mechanism. The water tank has a water storage cavity and a water tank perforation communicating with the water storage cavity. The spring winding mechanism is rotatably disposed outside the water tank on the water tank. The paddle mechanism is rotatably disposed in the water storage cavity of the water tank, and the paddle mechanism is connected to the spring winding mechanism through the water tank perforation of the water tank. The magnetic resistance unit includes a flywheel and an internal magnetic control mechanism. The flywheel has a flywheel space, and the internal magnetic control mechanism is suspended in the flywheel space of the flywheel. The flywheel is linked with the paddle mechanism. While the paddle mechanism is driven to rotate in the water storage cavity of the water tank, the flywheel rotates relative to the internal magnetic control mechanism. The other end of the pulling belt is wound around the spring winding mechanism of the resistance device. Description of the Drawings

[0029] Figure 1 It is a three-dimensional schematic diagram of a rowing machine according to a preferred embodiment of the present invention.

[0030] Figure 2 It is a side view schematic diagram of the rowing machine according to the above-mentioned preferred embodiment of the present invention.

[0031] Figure 3 It is a three-dimensional schematic diagram of a resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present invention.

[0032] Figure 4 It is a cross-sectional schematic diagram of the resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present invention.

[0033] Figure 5 It is a three-dimensional schematic diagram of a perspective of a magnetic resistance unit of the resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present invention.

[0034] Figure 6 It is a three-dimensional schematic diagram of another perspective of the magnetic resistance unit of the resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present invention.

[0035] Figure 7 It is an exploded schematic diagram of the magnetic resistance unit of the resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present invention.

[0036] Figure 8 It is a cross-sectional schematic diagram of the magnetic resistance unit of the resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present invention.

[0037] Figure 9 It is a three-dimensional schematic diagram of an inner magnetic control mechanism of the magnetic resistance unit of the resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present invention.

[0038] Figure 10 It is an exploded schematic diagram of a perspective of the inner magnetic control mechanism of the magnetic resistance unit of the resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present invention.

[0039] Figure 11 It is an exploded schematic diagram of another perspective of the inner magnetic control mechanism of the magnetic resistance unit of the resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present invention.

[0040] Figure 12 It is a cross-sectional schematic diagram of a partial position of the inner magnetic control mechanism of the magnetic resistance unit of the resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present invention.

[0041] Figure 13 is Figure 12 a partially enlarged view of the position.

[0042] Figure 14 is a top view schematic diagram of a partial position of the magnetic resistance unit of the resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present utility model.

[0043] Figure 15 is a three-dimensional schematic diagram of a perspective view of another resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present utility model.

[0044] Figure 16 is a three-dimensional schematic diagram of another perspective view of the resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present utility model.

[0045] Figure 17 is a sectional schematic diagram of a three-dimensional perspective of the resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present utility model.

[0046] Figure 18 is Figure 17 a partially enlarged schematic diagram of the position.

[0047] Figure 19 is a sectional schematic diagram of a planar perspective of the resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present utility model.

[0048] Figure 20 is a three-dimensional schematic diagram of a magnetic resistance unit of the resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present utility model.

[0049] Figure 21 is an exploded schematic diagram of the magnetic resistance unit of the resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present utility model.

[0050] Figure 22 is a sectional schematic diagram of a planar perspective of the magnetic resistance unit of the resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present utility model.

[0051] Figure 23 is a top view schematic diagram of a state of a partial structure of the magnetic resistance unit of the resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present utility model.

[0052] Figure 24 is a top view schematic diagram of another state of a partial structure of the magnetic resistance unit of the resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present utility model.

[0053] Figure 25It is a schematic diagram of a partial structure of a deformation example of the resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present invention. Detailed implementation manners

[0054] Before detailing any embodiment of the present invention, it should be understood that in its application, the present invention is not limited to the details of the construction and arrangement of the components described in the following description or illustrated in the following drawings. The present invention is capable of other embodiments and of being practiced or carried out in various ways. Additionally, it should be understood that the terminology and phrases used herein are for the purpose of description and should not be regarded as limiting. As used herein, the terms "comprising," "comprises," or "having" and their variants are intended to cover the listed items and their equivalents as well as additional items. Unless otherwise specified or limited, the terms "mounted," "connected," "supported," and "coupled" and their variants are used broadly and cover both direct and indirect mounting, connection, support, and coupling. Further, "connected" and "coupled" are not limited to physical or mechanical connection or coupling.

[0055] And, on the one hand, in the disclosure of the present invention, the orientation or positional relationship indicated by the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present invention; on the other hand, the term "a" should be understood as "at least one" or "one or more." That is, in one embodiment, the number of an element can be one, while in other embodiments, the number of the element can be multiple. The term "a" should not be construed as limiting the quantity.

[0056] Appendix Figure 1 and Figure 2Shows a rowing machine according to a preferred embodiment of the present utility model, wherein the rowing machine includes a rowing machine main body 1000, a resistance device 2000, and a pulling device 3000. The rowing machine main body 100 includes a frame 1001 and a seat 1002 slidably disposed on the frame 1001. The resistance device 2000 is disposed on the frame 1001. The pulling device 3000 includes a pulling belt 3001 and a handle 3002 disposed at one end of the pulling belt 3001. The other end of the pulling belt 3001 is connected to the resistance device 2000. When the user sits on the seat 1002 and pedals on the frame 1001, if the user's legs exert force to slide the seat 1002 relative to the frame 1001, the user can apply force to the resistance device 2000 through the handle 3002 and the pulling belt 3001, and the resistance device 2000 provides resistance to help the user achieve a fitness effect.

[0057] Specifically, the resistance device 2000 includes a water resistance unit 10 and a magnetic resistance unit 20. The water resistance unit 10 is used to provide water resistance, and the magnetic resistance unit 20 is used to provide magnetic resistance. The water resistance unit 10 and the magnetic resistance unit 20 cooperate with each other to provide composite resistance to help the user achieve a better fitness effect. Preferably, the magnetic resistance provided by the magnetic resistance unit 20 can be conveniently adjusted to adjust the resistance of the resistance device 2000, thereby helping the user achieve different fitness effects.

[0058] Specifically, the water resistance unit 10 includes a water tank 11, a paddle mechanism 12, and a spring winding mechanism 13. The water tank 11 has a water storage chamber 111 and a water tank perforation 112 communicating with the water storage chamber 111. The paddle mechanism 12 is rotatably disposed in the water storage chamber 111 of the water tank 11. The spring winding mechanism 13 is rotatably installed outside the water tank 11, and the connecting shaft 131 of the spring winding mechanism 13 extends into the water storage chamber 111 through the water tank perforation 112 of the water tank 11. The paddle mechanism 12 is installed on the connecting shaft 131 of the spring winding mechanism 13, and one end of the pulling belt 3001 is wound around the belt pulley 132 of the spring winding mechanism 13. When the user applies force to the spring winding mechanism 13 through the pulling belt 3001, on the one hand, the belt pulley 132 of the spring winding mechanism 13 drives the spring to deform and accumulate elastic potential energy, which can make the spring winding mechanism 13 reset. On the other hand, the connecting shaft 131 of the spring winding mechanism 13 drives the paddle mechanism 12 to rotate in the water storage chamber 111 of the water tank 11, and the water in the water storage chamber 111 of the water tank 11 generates resistance to the paddle mechanism 12, so that the water resistance unit 10 provides water resistance.

[0059] The magnetoresistive unit 20 includes a flywheel 21 and an internal magnet control mechanism 22. The flywheel 21 has a flywheel space 211, and the internal magnet control mechanism 22 is suspended in the flywheel space 211 of the flywheel 21. Wherein the flywheel 21 is linked with the paddle mechanism 12, that is, while the paddle mechanism 12 is driven to rotate in the water holding chamber 111 of the water tank 11, the flywheel 21 rotates relative to the internal magnet control mechanism 22. At this time, the flywheel 21 cuts the magnetic induction lines of the internal magnet control mechanism 22 to provide magnetic resistance. In this way, the water resistance unit 10 and the magnetoresistive unit 20 cooperate with each other to provide composite resistance to help the user achieve a better fitness effect.

[0060] In the rowing machine of the present invention, the flywheel 21 is drivably connected to the driving disk 133 of the spring winding mechanism 13. In this way, the flywheel 21 is linked with the paddle mechanism 12, so that while the paddle mechanism 12 is driven by the connecting shaft 131 of the spring winding mechanism 13 to rotate in the water holding chamber 111 of the water tank 11, the flywheel 21 is driven by the driving disk 133 of the spring winding mechanism 13 to rotate relative to the internal magnet control mechanism 22.

[0061] It is worth mentioning that the way the flywheel 21 is drivably connected to the driving disk 133 of the spring winding mechanism 13 is not limited in the rowing machine of the present invention, as long as the driving disk 133 of the spring winding mechanism 13 can drive the flywheel 21 to rotate when it rotates. For example, in the Figures 1 to 14 specific example of the rowing machine of the present invention shown, the resistance device 2000 includes a transmission belt 110. The opposite ends of the transmission belt 110 are respectively sleeved on the driving disk 133 of the spring winding mechanism 13 and the flywheel 21, so that the flywheel 21 is drivably connected to the driving disk 133 of the spring winding mechanism 13. Optionally, in other examples of the rowing machine of the present invention, the flywheel 21 can be meshed with the driving disk 133 of the spring winding mechanism 13, so that the flywheel 21 is drivably connected to the driving disk 133 of the spring winding mechanism 13.

[0062] Preferably, referring to the attached Figure 8, the flywheel 21 has a flywheel perforation 210 which communicates with the flywheel space 211. The internal magneto-control mechanism 22 has a mechanism perforation 220. The magnetoresistive unit 20 includes a flange 23 and an assembly shaft 24. The flange 23 is fixedly sleeved on one end of the assembly shaft 24. The other end of the assembly shaft 24 passes through the mechanism perforation 220 of the internal magneto-control mechanism 22 and the flywheel perforation 210 of the flywheel 21 respectively, and the flywheel 21 is rotatable relative to the assembly shaft 24. The flange and the assembly shaft 24 cooperate with each other to suspend the internal magneto-control mechanism 22 in the flywheel space 211 of the flywheel 21, and the opposite ends of the assembly shaft 24 are mounted on the frame 1001.

[0063] Continue to refer to the appendix Figures 1 to 4 , the rowing machine main body 1000 includes a first guide wheel 1003, a second guide wheel 1004 and a third guide wheel 1005. The first guide wheel 1003, the second guide wheel 1004 and the third guide wheel 1005 are respectively rotatably mounted on the frame 1001, and the extending direction of the rotation axis of the first guide wheel 1003 is the same as the extending direction of the rotation axis of the second guide wheel 1004. The extending direction of the rotation axis of the first guide wheel 1003 is perpendicular to the extending direction of the rotation axis of the third guide wheel 1005. The pulling belt 3001 is sequentially connected to the first guide wheel 1003, the second guide wheel 1004 and the third guide wheel 1005. The first guide wheel 1003 is used to change the extending direction of the pulling belt 3001 so that the pulling belt 3001 is in a roughly "U" shape. The second guide wheel 1004 is used to adjust the height of the pulling belt 3001 so that the height of the pulling belt 3001 is the same as the height of the belt reel 132 of the spring winding mechanism 13. The third guide wheel 1005 is used to adjust the width direction of the pulling belt 3001 from the horizontal direction to the height direction so that the pulling belt 3001 can be wound around the belt reel 132 of the spring winding mechanism 13. Refer to the appendix Figures 5 to 14, the flywheel 21 includes a flywheel body 212 and a conductor 213. The flywheel body 212 forms the flywheel space 211 and the flywheel perforation 210. The conductor 213 is disposed on the flywheel body 212 and is located in the flywheel space 211. The internal magnetic control mechanism 22 includes a housing 221, a driving unit 222, a bent and extended swing arm 223, and at least one magnetic element 224. The driving unit 222 is disposed in the housing 221. The swing arm 223 has a swing arm pivot end 2231 and a swing arm driven end 2232 which are opposite to each other. The swing arm pivot end 2231 of the swing arm 223 is rotatably mounted on the edge of the housing 221. The swing arm driven end 2232 of the swing arm 223 is drivingly connected to the driving unit 222. The magnetic element 224 is disposed on the outer side of the swing arm 223, and the magnetic element 224 provides a magnetic field environment. The internal magnetic control mechanism 22 is suspended in the flywheel space 211 of the flywheel 21 with the magnetic element 224 facing the conductor 213, and at least a part of the conductor 213 is located in the magnetic field environment of the magnetic element 224. When the flywheel 21 is driven to rotate relative to the internal magnetic control mechanism 22, the conductor 213 of the flywheel 21 cuts the magnetic induction lines of the magnetic element 224 of the internal magnetic control mechanism 22 to generate eddy currents. In this way, the magnetic resistance unit 20 provides magnetic resistance.

[0064] After the driving unit 222 drives the swing arm 223 and the magnetic element 224 to swing in a direction close to the conductor 213, the distance between the magnetic element 224 and the conductor 213 is reduced. At this time, the magnetic resistance unit 20 can provide greater magnetic resistance, that is, the user needs to use greater force to drive the flywheel 21 to rotate. Correspondingly, after the driving unit 222 drives the swing arm 223 and the magnetic element 224 to swing in a direction away from the conductor 213, the distance between the magnetic element 224 and the conductor 213 is increased. At this time, the magnetic resistance unit 20 can provide smaller magnetic resistance, that is, the user needs to use smaller force to drive the flywheel 21 to rotate. That is to say, by changing the distance between the magnetic element 224 and the conductor 213, the magnetic resistance provided by the magnetic resistance unit 20 can be adjusted, that is, the resistance provided by the resistance device 2000 can be adjusted to meet the exercise needs of the user.

[0065] Further, referring to the appendix Figures 5 to 8, the flywheel body 212 includes a wheel disc 2121, a wheel ring 2122 extending from the edge of the wheel disc 2121 in one direction, and a sleeve ring 2123 extending from the middle of the wheel disc 2121 in the other direction. A flywheel space 211 is formed between the wheel ring 2122 and the wheel disc 2121. The flywheel perforation 210 is formed in the middle of the wheel disc 2121. The conductor 213 is disposed on the inner wall of the wheel ring 2122 so that the conductor 213 is disposed on the flywheel body 212 and located in the flywheel space 211. One end of the transmission belt 110 is sleeved on the sleeve ring 2123. In a specific example of the rowing machine of the present invention, the conductor 213 may be an aluminum ring. The outer diameter dimension of the conductor 213 is the same as the inner diameter dimension of the wheel ring 2122 of the flywheel body 212. Based on the frictional force generated between the outer wall of the conductor 213 and the inner wall of the wheel ring 2122, the conductor 213 can be disposed on the wheel ring 2122 and located in the flywheel space 211.

[0066] Further, referring to the attached Figure 8 , the housing 221 has an internal space 2211 and a peripheral opening 2212, and the housing 221 includes a first housing 2215 and a second housing 2216. The first housing 2215 and the second housing 2216 are installed with each other to form the internal space 2211 and the peripheral opening 2212 between the first housing 2215 and the second housing 2216, and the peripheral opening 2212 communicates with the internal space 2211. The drive unit 222, the swing arm 223, and the magnetic element 224 are all located in the internal space 2211 of the housing 221, and the magnetic element 224 is adjacent to the peripheral opening 2212 of the housing 221. After the internal magnetic control mechanism 22 is suspended in the flywheel space 211 of the flywheel 21, the peripheral opening 2212 of the housing 221 of the internal magnetic control mechanism 22 faces the conductor 213 of the flywheel 21, so that the magnetic element 224 faces the conductor 213. That is to say, after the internal magnetic control mechanism 22 is suspended in the flywheel space 211 of the flywheel 21, the conductor 213 surrounds the outside of the peripheral opening 2212 of the housing 221. Since the magnetic element 224 is adjacent to the peripheral opening 2212 of the housing 221, the magnetic element 224 can face the conductor 213 and allow at least a part of the conductor 213 to be in the magnetic field environment of the magnetic element 224. In this way, when the flywheel 21 is driven to rotate around the assembly shaft 24, the conductor 213 of the flywheel 21 can cut the magnetic induction lines of the magnetic element 224 of the internal magnetic control mechanism 22 to generate eddy currents, so that the magnetic resistance unit 20 provides magnetic resistance.

[0067] It is worth mentioning that the installation methods of the first housing 2215 and the second housing 2216 are not limited in the rowing machine of the present utility model, as long as the two can be reliably installed. For example, in Figures 1 to 14 this specific example of the rowing machine of the present utility model shown, the first housing 2215 and the second housing 2216 can be installed to each other by screws.

[0068] Referring to Figure 10 and Figure 14 , the drive unit 222 includes a drive motor 2223, a transmission gear set 2224, a sector gear 2225, and a connecting rod 2226. The drive motor 2223 is disposed in the outer housing 221. Each transmission gear in the transmission gear set 2224 is rotatably installed in the outer housing 221 in such a way that adjacent transmission gears mesh with each other. And one transmission gear in the transmission gear set 2224 meshes with the worm 22231 of the drive motor 2223. The sector gear 2225 is rotatably installed in the outer housing 221, and the sector gear 2225 meshes with another transmission gear in the transmission gear set 2224. Opposite ends of the connecting rod 2226 are rotatably installed on the sector gear 2225 and the driven end 2232 of the swing arm 223 of the swing arm 223 respectively.

[0069] When the worm 22231 of the drive motor 2223 rotates in one direction, after the transmission gear set 2224 transmits the power output by the drive motor 2223 to the sector gear 2225, the sector gear 2225 rotates in one direction. At this time, the sector gear 2225 drives the swing arm 223 and the magnetic element 224 to swing towards the direction close to the conductor 213 through the connecting rod 2226. Correspondingly, when the worm 22231 of the drive motor 2223 rotates in the opposite direction, after the transmission gear set 2224 transmits the power output by the drive motor 2223 to the sector gear 2225, the sector gear 2225 rotates in the opposite direction. At this time, the sector gear 2225 drives the swing arm 223 and the magnetic element 224 to swing towards the direction away from the conductor 213 through the connecting rod 2226. That is to say, the swinging direction of the swing arm 223 and the magnetic element 224 can be controlled by controlling the rotation direction of the worm 22231 of the drive motor 2223.

[0070] In Figures 1 to 14In this specific example of the rowing machine of the present utility model shown, the drive motor 2223 can be locked to the second housing 2216 by screws, and the drive motor 2223 is located in the internal space 2211 of the outer housing 221. Relative both sides of each transmission gear in the transmission gear set 2224 and the sector gear 2225 are rotatably mounted on the first housing 2215 and the second housing 2216, so that the transmission gear set 2224 and the sector gear 2225 are rotatably arranged in the outer housing 221 and located in the internal space 2211 of the outer housing 221.

[0071] Relative both sides of the swing arm pivot end 2231 of the swing arm 223 are respectively rotatably mounted on the edge of the first housing 2215 and the edge of the second housing 2216, so that the swing arm pivot end 2231 of the swing arm 223 is rotatably arranged on the edge of the outer housing 221, thereby enabling the swing arm 223 to swing in the internal space 2211 of the outer housing 221.

[0072] Reference attached Figure 10 and Figure 11 Referring to the attached drawings, the first housing 2215 has a first outer blocking protrusion 22151 and a first inner blocking protrusion 22152, the second housing 2216 has a second outer blocking protrusion 22161 and a second inner blocking protrusion 22162. The first outer blocking protrusion 22151 and the first inner blocking protrusion 22152 of the first housing 2215 and the second outer blocking protrusion 22161 and the second inner blocking protrusion 22162 of the second housing 2216 respectively protrude into the internal space 2211 of the outer housing 221. Among them, the first outer blocking protrusion 22151 of the first housing 2215 and the second outer blocking protrusion 22162 of the second housing 2216 are located outside the swing arm 223, for limiting the maximum distance of the outward swing of the swing arm 223 to prevent the magnetic element 224 from colliding with or rubbing against the conductor 213. Among them, the first inner blocking protrusion 22152 of the first housing 2215 and the second inner blocking protrusion 22162 of the second housing 2216 are located inside the swing arm 223, for limiting the maximum distance of the inward swing of the swing arm 223 to prevent the drive unit 222 from jamming.

[0073] Reference attached Figure 10 and Figure 14, the inner magnetic control mechanism 22 further includes a circuit board 226, the circuit board 226 is disposed in the internal space 2211 of the housing 221, and the drive motor 2223 of the drive unit 222 is connected to the circuit board 226. The circuit board 226 may be mounted with logic chips, or the circuit board 226 may be provided with logic circuits to allow the circuit board 226 to control the operating state of the drive motor 2223. For example, the circuit board 226 may control the rotation direction of the worm 22231 of the drive motor 2223. Preferably, the circuit board 226 may be locked to the second housing 2216 by screws so that the circuit board 226 can be stably disposed in the internal space 2211 of the housing 221.

[0074] Refer to the appendix Figures 5 to 13 , the inner magnetic control mechanism 22 further includes a potentiometer 225. The fixed portion 2252 of the potentiometer 225 is disposed on the housing 221 and connected to the circuit board 226. The rotating shaft 2251 of the potentiometer 225 is mounted on the sector gear 2225. When the worm 22231 of the drive motor 2223 rotates to cause the transmission gear set 2224 to transmit power to the sector gear 2225, the sector gear 2225 drives the rotating shaft 2251 of the potentiometer 225 to rotate synchronously while rotating, so as to change the resistance value of the potentiometer 225. The resistance value of the potentiometer 225, the rotation position of the sector gear 2225, and the swing position of the swing arm 223 are in one-to-one correspondence. Therefore, by detecting the resistance value of the potentiometer 225, the swing position of the swing arm 223 can be determined, and further the resistance that the resistance device 2000 can provide can be obtained.

[0075] Further, refer to the appendix Figure 6, the housing 221 has a housing through hole 2214 and a wire threading hole 2217. The housing through hole 2214 and the wire threading hole 2217 are respectively formed in the second housing 2216 and communicate with the internal space 2211 of the housing 221. Wherein the fixed part 2252 of the potentiometer 225 is fixedly mounted on the second housing 2216 outside the housing 221. The rotating shaft 2251 of the potentiometer 225 extends through the housing through hole 2214 of the housing 221 into the internal space 2211 of the housing 221, and the rotating shaft 2251 is inserted into the insertion hole 22251 of the sector gear 2225 so that the rotating shaft 2251 is mounted on the sector gear 2225. One end of the wire 227 of the internal magneto-control mechanism 22 is connected to the circuit board 226, and the other end extends from the internal space 2211 of the housing 221 to the outside of the housing 221 through the wire threading hole 2217 of the housing 221 and is connected to the fixed part 2252 of the potentiometer 225, so that the fixed part 2252 of the potentiometer 225 is connected to the circuit board 226. In this way, the circuit board 226 can control the working state of the drive motor 2223 according to the resistance value feedback by the potentiometer 226.

[0076] Preferably, referring to the attached Figure 9 , Figure 10 , Figure 12 and Figure 13 , the second housing 2216 has a receiving groove 22163. The housing through hole 2214 and the wire threading hole 2217 of the housing 221 respectively communicate with the receiving groove 22163 of the second housing 2216. Wherein the fixed part 2252 of the potentiometer 225 is received in the receiving groove 22163 of the second housing 2216 to prevent the potentiometer 225 from protruding outward.

[0077] Furthermore, continuing to refer to the attached Figure 9 , Figure 10 , Figure 12 and Figure 13, the second housing 2216 has two elastic clamping arms 22164, and the two elastic clamping arms 22164 are located on opposite sides of the receiving groove 22163. During the process of inserting the potentiometer 225 into the receiving groove 22163 of the second housing 2216, the fixing part 2252 of the potentiometer 225 pushes the two elastic clamping arms 22164 to deform towards opposite sides, so that the two elastic clamping arms 22164 accumulate elastic potential energy. After the potentiometer 225 is inserted into the receiving groove 22163 of the second housing 2216, the two elastic clamping arms 22164 automatically reset to clamp the fixing part 2252 of the potentiometer 225, so that the potentiometer 225 is reliably installed on the second housing 2216.

[0078] Preferably, the fixing part 2252 of the potentiometer 225 has a limiting groove 22521, and the end of one of the two elastic clamping arms 22164 is located in the limiting groove 22521 of the fixing part 2252. In this way, on the one hand, the elastic clamping arm 22164 can prevent the fixing part 2252 from rotating. Especially when the sector gear 2225 drives the rotating shaft 2251 of the potentiometer 225 to rotate, the elastic clamping arm 22164 can prevent the fixing part 2252 from rotating, so as to ensure the one-to-one correspondence between the resistance value of the potentiometer 225, the rotation position of the sector gear 2225, and the swing position of the swing arm 223. On the other hand, during the assembly of the potentiometer 225, the limiting groove 22521 of the fixing part 2252 helps to determine the installation direction of the potentiometer 225.

[0079] Continue to refer to the appendix Figure 1 and Figure 2, the rowing machine further includes an encoder 4000, the encoder 4000 is disposed on the frame 1001, and the encoder 4000 is connected to the circuit board 226 of the internal magnetic control mechanism 22. A user can send an encoded instruction to the circuit board 226 through the encoder 4000. For example, the user can rotate the knob of the encoder 4000 to cause the encoder 4000 to generate a corresponding instruction and send it to the circuit board 226. When executing this instruction, the circuit board 226 controls the working state of the drive motor 2223 to drive the swing arms 223 and the magnetic elements 224 to swing. During this process, the circuit board 226 can determine whether the swing arms 223 and the magnetic elements 224 swing in place according to the resistance value fed back by the potentiometer 225. If the circuit board 226 determines that the swing arms 223 and the magnetic elements 224 swing in place according to the resistance value fed back by the potentiometer 225, the circuit board 226 controls the drive motor 2223 to stop it.

[0080] Attached Figures 15 to 24 shows another specific example of the resistance device 2000, wherein the resistance device 2000 includes a water resistance unit 10A, a magnetic resistance unit 20A, and a linkage shaft 30A.

[0081] Specifically, referring to Attached Figures 15 to 19, the water resistance unit 10A includes a water tank 11A and a paddle mechanism 12A. The water tank 11A has a water storage chamber 111A and a water tank perforation 112A communicating with the water storage chamber 111A. The linkage shaft 30A has a driven end 31A and an assembly end 32A of the linkage shaft opposite to each other. The middle part of the linkage shaft 30A is rotatably assembled in the water tank perforation 112A of the water tank 11A. The driven end 31A of the linkage shaft 30A is exposed outside the water tank 11A, and the assembly end 32A of the linkage shaft 30A is located in the water storage chamber 111A of the water tank 11A. The paddle mechanism 12A is fixedly installed at the assembly end 32A of the linkage shaft 30A so that the paddle mechanism 12A is suspended in the water storage chamber 111A of the water tank 11A by the linkage shaft 30A. The driven end 31A of the linkage shaft 30A is drivably connected to the pulling belt 3001 of the pulling device 3000. For example, a coil spring mechanism can be installed at the driven end 31A of the linkage shaft 30A, and the coil spring mechanism is connected to the pulling belt 3001. In this way, the driven end 31A of the linkage shaft 30A is drivably connected to the pulling belt 3001 of the pulling device 3000. The user can drive the linkage shaft 30A to rotate through the pulling belt 3001 of the pulling device 3000. The linkage shaft 30A drives the paddle mechanism 12A to rotate in the water storage chamber 111A of the water tank 11A. The water in the water storage chamber 111A of the water tank 11A has resistance to the paddle mechanism 12A, so that the water resistance unit 10A provides water resistance to help the user achieve the purpose of fitness.

[0082] Continue to refer to the appendix Figures 15 to 17 , the water tank 11A includes a bottom shell 113A and a top cover 114A. The top cover 114A is installed on the bottom shell 113A, and the water storage chamber 111A of the water tank 11A is formed between the bottom shell 113A and the top cover 114A. The installation method of the bottom shell 113A and the top cover 114A is not limited in the resistance device 2000 of the present invention, as long as it can ensure the sealing of the installation positions of the bottom shell 113A and the top cover 114A. It can be understood that by sealing the installation positions of the bottom shell 113A and the top cover 114A, the water contained in the water storage chamber 111A of the water tank 11A can be prevented from overflowing through the installation positions of the bottom shell 113A and the top cover 114A.

[0083] The water tank perforation 112A of the water tank 11A is formed in the top cover 114A, so that the driven end 31A of the linkage shaft 30A of the linkage shaft 30A is exposed at the top of the water tank 11A. In this way, the pulling belt 3001 of the pulling device 3000 can drive the linkage shaft 30A to rotate at the top of the water tank 11A. Preferably, the water tank perforation 112A of the water tank 11A is formed in the middle of the top cover 114A.

[0084] Reference appendix Figures 17 to 24 As shown, the reluctance unit 20A includes a flywheel 21A and an internal magnetic control mechanism 22A. The flywheel 21A has a flywheel space 211A and a flywheel perforation 210A communicating with the flywheel space 211A. The flywheel 21A is fixedly sleeved on the driven end 31A of the linkage shaft 30A in such a way that the linkage shaft 30A passes through the flywheel perforation 210A. The internal magnetic control mechanism 22A has a mechanism perforation 220A and is rotatably sleeved on the driven end 31A of the linkage shaft 30A in such a way that the linkage shaft 30A passes through the mechanism perforation 220A. And the linkage shaft 30A suspends the internal magnetic control mechanism 22A in the flywheel space 211A of the flywheel 21A. It can be understood that since the paddle mechanism 12A is fixedly installed at the assembly end 32A of the linkage shaft 30A and the flywheel 21A is fixedly sleeved on the driven end 31A of the linkage shaft 30A, the flywheel 21A and the paddle mechanism 12A are linked. That is, while the paddle mechanism 12A is driven to rotate in the water containing cavity 111A of the water tank 11A, the flywheel 21A rotates relative to the internal magnetic control mechanism 22A. Thus, the water resistance unit 10A provides water resistance and the reluctance unit 20A provides magnetic resistance, so that the resistance device 2000 provides composite resistance.

[0085] Specifically, when the linkage shaft 30A rotates, on the one hand, the linkage shaft 30A drives the paddle mechanism 12A to rotate in the water containing cavity 111A of the water tank 11A, so that the water contained in the water containing cavity 111A of the water tank 11A provides resistance. At this time, the water resistance unit 10A provides water resistance. On the other hand, the linkage shaft 30A drives the flywheel 21A to rotate, so that the flywheel 21A cuts the magnetic induction lines of the internal magnetic control mechanism 22A. At this time, the reluctance unit 20A provides magnetic resistance. Thus, the resistance device 2000 provides composite resistance to help the user achieve a better fitness effect.

[0086] Reference appendix Figures 17 to 19, the resistance device 2000 further includes a first assembly unit 40A, the first assembly unit 40A includes a first assembly body 41A and at least one first bearing 42A, the first assembly body 41A has a first assembly channel 411A, the first bearing 42A is fitted into the first assembly channel 411A of the first assembly body 41A, the outer side of the bearing of the first bearing 42A is fixedly installed on the first assembly body 41A, the inner side of the bearing of the first bearing 42A is fixedly sleeved on the linkage shaft 30A, and the first assembly body 41A is fixedly installed on the water tank perforation 112A of the water tank 11A, so that the middle part of the linkage shaft 30A is rotatably assembled in the water tank perforation 112A of the water tank 11A.

[0087] Preferably, the first assembly unit 40A includes two of the first bearings 42A, and the two first bearings 42A are respectively sleeved at different height positions of the linkage shaft 30A. In this way, when the user uses the rowing machine for fitness, the two first bearings 42A can prevent the linkage shaft 30A from shaking and tilting, so that the linkage shaft 30A rotates around its own axis.

[0088] Continue to refer to the appendix Figures 17 to 19 , the resistance device 2000 further includes a second assembly unit 50A, the second assembly unit 50A includes a second assembly body 51A and at least one second bearing 52A, the second assembly body 51A has a second assembly channel 511A, the second bearing 52A is fitted into the second assembly channel 511A of the second assembly body 51A, the outer side of the bearing of the second bearing 52A is fixedly installed on the second assembly body 51A, the inner side of the bearing of the second bearing 52A is fixedly sleeved on the linkage shaft 30A, and the second assembly body 51A is fixedly installed on the inner magnetic control mechanism 22A, so that the inner magnetic control mechanism 22A is rotatably sleeved on the driven end 31A of the linkage shaft 30A of the linkage shaft 30A in such a way that the linkage shaft 30A penetrates into the mechanism perforation 220A. That is to say, the linkage shaft 30A can rotate in the mechanism perforation 220A of the inner magnetic control mechanism 22A.

[0089] Preferably, a part of the second assembly body 51A extends into the mechanism perforation 220A of the inner magnetic control mechanism 22A, and the shape and size of the part of the second assembly body 51A extending into the mechanism perforation 220A of the inner magnetic control mechanism 22A match the shape and size of the mechanism perforation 220A of the inner magnetic control mechanism 22A. In this way, when the user uses the rowing machine for fitness, the rowing machine can prevent the second assembly body 51A from shaking relative to the inner magnetic control mechanism 22A, so as to ensure the reliability and stability of the rowing machine.

[0090] Continuing to refer to the attached Figures 15 to 19 , the resistance device 2000 further includes an assembly frame 60A. The assembly frame 60A includes a top assembly portion 61A. The top assembly portion 61A is located above the water tank 11A, and the top assembly portion 61A is configured to maintain a fixed position relative to the water tank 11A. Wherein the inner magnetic control mechanism 22A is fixedly installed on the top assembly portion 61A. In this way, the positions of the inner magnetic control mechanism 22A and the water tank 11A remain unchanged.

[0091] Preferably, the assembly frame 60A includes a bottom assembly portion 62A. The water tank 11A is fixedly installed on the bottom assembly portion 62A. The top assembly portion 61A is fixedly installed on the bottom assembly portion 62A. And the top assembly portion 61A is supported by the bottom assembly portion 62A above the water tank 11A. Thus, the top assembly portion 61A is located above the water tank 11A, and the top assembly portion 61A is configured to maintain a fixed position relative to the water tank 11A.

[0092] It is worth mentioning that the specific manner in which the inner magnetic control mechanism 22A is fixedly installed on the top assembly portion 61A is not limited in the resistance device 2000 of the present utility model. For example, in this specific example of the rowing machine of the present utility model, referring to the attached Figure 17 and Figure 18 , the inner magnetic control mechanism 22A and the top assembly portion 61A can be fixed by a set of screws so that the inner magnetic control mechanism 22A is fixedly installed on the top assembly portion 61A.

[0093] Continuing to refer to the attached Figures 17 to 19 , the resistance device 2000 further includes a third assembly unit 70A. The third assembly unit 70A includes a third assembly body 71A and at least one third bearing 72A. The third assembly body 71A has a third assembly channel 711A. The third bearing 72A is fitted into the third assembly channel 711A of the third assembly body 71A. The outer side of the bearing of the third bearing 72A is fixedly installed on the third assembly body 71A. The inner side of the bearing of the third bearing 72A is fixedly sleeved on the linkage shaft 30A. The third assembly body 71A is fixedly installed in the assembly through hole 611A of the top assembly portion 61A. In this way, the two first bearings 42A and one third bearing 72A can prevent the linkage shaft 30A from shaking and tilting during rotation at different positions of the linkage shaft 30A, thereby ensuring that the linkage shaft 30A rotates about its own central axis.

[0094] Referring to the attached Figure 15 ,Figure 17 and Figure 18 , the water tank 11A has an assembly groove 115A, and the linkage shaft 30A suspends the magnetoresistive unit 20A in the assembly groove 115A of the water tank 11A. In this way, not only can the resistance device 2000 be miniaturized, but also from the side view perspective, the magnetoresistive unit 20A is visually invisible, which is beneficial to hiding the magnetoresistive unit 20A.

[0095] Continue to refer to the appendix Figures 17 to 24 , the flywheel 21A includes a flywheel body 212A and a conductor 213A. The flywheel body 212A forms the flywheel space 211A and the flywheel through hole 210A. The conductor 213A is disposed on the flywheel body 212A and is located in the flywheel space 211A. The internal magnet control mechanism 22A includes a housing 221A, a driving unit 222A, at least one bent and extended swing arm 223A, and at least one set of magnetic elements 224A. The driving unit 222A is disposed in the housing 221A. The swing arm 223A has a swing arm pivot end 2231A and a swing arm driven end 2232A that are opposite to each other. The swing arm pivot end 2231A of the swing arm 223A is rotatably mounted on the edge of the housing 221A. The swing arm driven end 2232A of the swing arm 223A is drivably connected to the driving unit 222A. A set of the magnetic elements 224A is disposed on the outer side of the swing arm 223A, and the magnetic elements 224A provide a magnetic field environment. The internal magnet control mechanism 22A is suspended in the flywheel space 211A of the flywheel 21A in such a way that the magnetic elements 224A face the conductor 213A, and at least a part of the conductor 213A is located in the magnetic field environment of the magnetic elements 224A. When the flywheel 21A is driven to rotate relative to the internal magnet control mechanism 22A, the conductor 213A of the flywheel 21A cuts the magnetic induction lines of the magnetic elements 224A of the internal magnet control mechanism 22A to generate eddy currents. In this way, the magnetoresistive unit 20A provides magnetic resistance.

[0096] Specifically, after the driving unit 222A drives the swing arm 223A and the magnetic element 224A to swing towards the direction close to the conductor 213A, the distance between the magnetic element 224A and the conductor 213A is reduced. At this time, the magnetoresistive unit 20A can provide a greater magnetic resistance force, that is, the user needs to use a greater force to drive the flywheel 21A to rotate. Correspondingly, after the driving unit 222A drives the swing arm 223A and the magnetic element 224A to swing towards the direction away from the conductor 213A, the distance between the magnetic element 224A and the conductor 213A is increased. At this time, the magnetoresistive unit 20A can provide a smaller magnetic resistance force, that is, the user needs to use a smaller force to drive the flywheel 21A to rotate. That is to say, by changing the distance between the magnetic element 224A and the conductor 213A, the magnetic resistance provided by the magnetoresistive unit 20A can be adjusted, that is, the resistance provided by the resistance device 2000 can be adjusted to meet the exercise needs of the user.

[0097] Further, referring to the attached Figure 17 and Figure 19 , the flywheel body 212A includes a wheel disc 2121A and a wheel ring 2122A extending from the edge of the wheel disc 2121A in one direction. A flywheel space 211A is formed between the wheel ring 2122A and the wheel disc 2121A. The flywheel through hole 210A is formed in the middle of the wheel disc 2121A. The conductor 213A is disposed on the inner wall of the wheel ring 2122A so that the conductor 213A is disposed on the flywheel body 212A and located in the flywheel space 211A. In a specific example of the rowing machine of the present invention, the conductor 213A may be an aluminum ring. The outer diameter dimension of the conductor 213A is the same as the inner diameter dimension of the wheel ring 2122A of the flywheel body 212A. Based on the frictional force generated between the outer wall of the conductor 213A and the inner wall of the wheel ring 2122A, the conductor 213A can be disposed on the wheel ring 2122A and located in the flywheel space 211A.

[0098] Referring to the attached Figures 20 to 22, the housing 221A has an internal space 2211A, a peripheral opening 2212A, and at least one communication channel 2213A. The housing 221A includes a first housing 2215A and a second housing 2216A. The first housing 2215A and the second housing 2216A are installed with each other to form the internal space 2211A, the peripheral opening 2212A, and the communication channel 2213A between the first housing 2215A and the second housing 2216A. The peripheral opening 2212A surrounds the internal space 2211A, and the communication channel 2213A communicates the internal space 2211A and the peripheral opening 2212A.

[0099] It is worth mentioning that the installation manner of the first housing 2215A and the second housing 2216A is not limited in the rowing machine of the present utility model, as long as the two can be reliably installed. For example, in Figures 15 to 25 this specific example of the rowing machine of the present utility model shown in the appendix, the first housing 2215A and the second housing 2216A can be installed with each other by screws.

[0100] Referring to Figure 21 , Figure 23 and Figure 24 , the driving unit 222A includes a driving wheel 2221A, at least one connecting element 2222A, a driving motor 2223A, and a transmission gear set 2224A. The driving wheel 2221A is rotatably installed in the internal space 2211A of the housing 221A. One end of the connecting element 2222A is connected to the driving wheel 2221A. The other end of the connecting element 2222A extends to the peripheral opening 2212A after passing through the communication channel 2213A of the housing 221A and is connected to the driven end 2232A of the swing arm 223A. The driving motor 2223A is arranged in the internal space 2211A of the housing 221A. Each transmission gear in the transmission gear set 2224A is rotatably installed on the housing 221A in such a way that adjacent transmission gears mesh with each other. One transmission gear in the transmission gear set 2224A meshes with the worm 22231A of the driving motor 2223A, and the other meshes with the driving wheel 2221A. In this way, the driving motor 2223A can output power to the driving wheel 2221A through the transmission gear set 2224A to drive the driving wheel 2221A to rotate relative to the housing 221A.

[0101] When the driving motor 2223A and the transmission gear set 2224A drive the driving wheel 2221A to rotate, so as to drive the swing arm 223A and the magnetic element 224A to swing at the peripheral opening 2212A of the housing 221A through the connecting element 2222A, the distance between the magnetic element 224A and the conductor 213A can be increased or decreased. Specifically, when the driving motor 2223A and the transmission gear set 2224A drive the driving wheel 2221A to rotate, so as to drive the swing arm 223A and the magnetic element 224A to swing towards the direction close to the conductor 213A through the connecting element 2222A, the distance between the magnetic element 224A and the conductor 213A is decreased. At this time, the magnetoresistive unit 20A can provide a greater magnetic resistance, that is, the user needs to use greater force to drive the flywheel 21A to rotate. Correspondingly, when the driving motor 2223A and the transmission gear set 2224A drive the driving wheel 2221A to rotate, so as to drive the swing arm 223A and the magnetic element 224A to swing towards the direction away from the conductor 213A through the connecting element 2222A, the distance between the magnetic element 224A and the conductor 213A is increased. At this time, the magnetoresistive unit 20A can provide a smaller magnetic resistance, that is, the user needs to use smaller force to drive the flywheel 21A to rotate. That is to say, by changing the distance between the magnetic element 224A and the conductor 213A, the magnetic resistance provided by the magnetoresistive unit 20A can be adjusted, that is, the resistance provided by the resistance device 2000 can be adjusted to meet the exercise needs of the user.

[0102] Further, referring to the attached Figure 21 , the inner magnetic control mechanism 22A further includes a circuit board 226A. The circuit board 226A is disposed in the internal space 2211A of the housing 221A, and the driving motor 2223A of the driving unit 222A is connected to the circuit board 226A. The circuit board 226A can be mounted with a logic chip, or the circuit board 226A can be provided with a logic circuit to allow the circuit board 226A to control the working state of the driving motor 2223A. For example, the circuit board 226A can control the rotation direction of the worm 22231A of the driving motor 2223A.

[0103] Further, referring to the attached Figures 20 to 22, the inner magnetic control mechanism 22A further includes a potentiometer 225A. The fixed part 2252A of the potentiometer 225A is disposed on the housing 221A and connected to the circuit board 226A. The rotating shaft 2251A of the potentiometer 225A is mounted on the driving wheel 2221A. When the worm 22231A of the driving motor 2223A rotates to cause the transmission gear set 2224A to transmit power to the driving wheel 2221A, the driving wheel 2221A drives the rotating shaft 2251A of the potentiometer 225A to rotate synchronously while rotating, so as to change the resistance value of the potentiometer 225A. The resistance value of the potentiometer 225A, the rotating position of the driving wheel 2221A, and the swinging position of the swing arm 223A are in one-to-one correspondence. Therefore, the swinging position of the swing arm 223A can be determined by detecting the resistance value of the potentiometer 225A, and further the resistance that the resistance device 2000 can provide can be obtained.

[0104] Further, referring to the attached Figure 20 and Figure 22 , the housing 221A has a housing through hole 2214A and a wire through hole 2217A. The housing through hole 2214A and the wire through hole 2217A are respectively formed in the first housing 2215A and communicate with the internal space 2211A of the housing 221A. Wherein the fixed part 2252A of the potentiometer 225A is fixedly mounted on the first housing 2215A outside the housing 221A. The rotating shaft 2251A of the potentiometer 225A extends into the internal space 2211A of the housing 221A through the housing through hole 2214A of the housing 221A, and the rotating shaft 2251A is inserted into the assembly hole 22211A of the driving wheel 2221A so that the rotating shaft 2251A is mounted on the driving wheel 2221A. One end of the wire 227A of the inner magnetic control mechanism 22A is connected to the circuit board 226A, and the other end extends from the internal space 2211A of the housing 221A to the outside of the housing 221A through the wire through hole 2217A of the housing 221A and is connected to the fixed part 2252A of the potentiometer 225A, so that the fixed part 2252A of the potentiometer 225A is connected to the circuit board 226A. In this way, the circuit board 226A can control the working state of the driving motor 2223A according to the resistance value fed back by the potentiometer 225A.

[0105] When the drive motor 2223A and the transmission gear set 2224A drive the drive wheel 2221A to rotate, so as to drive the swing arm 223A to swing at the peripheral opening 2212A of the housing 221A through the connecting element 2222A, the drive wheel 2221A simultaneously drives the rotating shaft 2251A of the potentiometer 225A to rotate, so as to change the resistance value of the potentiometer 225A. In other words, the resistance value of the potentiometer 225A is associated with the swing position of the swing arm 223A, and the swing position of the swing arm 223A can be obtained by acquiring the resistance value of the potentiometer 225A, so as to determine the distance between the magnetic element 224A and the part of the flywheel 21A corresponding to the peripheral opening 2212A of the housing 221A, so as to obtain the load of the flywheel 21A when it is driven by the linkage shaft 30A to rotate.

[0106] Reference appendix Figure 21 As shown in the figure, the swing arm 223A includes a swing arm main body 2233A and at least one magnetic concentrating wall 2234A protruding from the side of the swing arm main body 2233A. The magnetic element 224A is arranged on the swing arm main body 2233A, and the magnetic concentrating wall 2234A shields at least a part of the side of the magnetic element 224A. The swing arm main body 2233A and the magnetic concentrating wall 2234A gather the magnetic induction lines of the magnetic element 224A in the direction towards the flywheel 21A, so as to reduce the magnetic leakage phenomenon and improve the magnetic utilization rate of the internal magnetic control mechanism 22A. At the same time, the magnetic concentrating wall 2234A extends from one end of the swing arm main body 2233A to the other end, so as to enhance the structural strength of the swing arm 223A and prevent the swing arm 223A from deforming, thus ensuring the reliability of the internal magnetic control mechanism 22A. That is to say, the magnetic concentrating wall 2234A can not only gather the magnetic induction lines of the magnetic element 224A in the direction towards the flywheel 21A to enhance the magnetic utilization rate of the internal magnetic control mechanism 22A, but also enhance the structural strength of the swing arm 223A and avoid the problem of affecting the reliability of the internal magnetic control mechanism 22A due to the deformation of the swing arm 223A.

[0107] Preferably, the swing arm 223A includes two of the magnetic flux concentrating walls 2234A, with one of the magnetic flux concentrating walls 2234A provided on each of the opposite sides of the swing arm body 2233A, so that a positioning groove 2235A is formed between the swing arm 223A, the swing arm body 2233A, and the two magnetic flux concentrating walls 2234A. The magnetic element 224A provided on the swing arm body 2233A is positioned in the positioning groove 2235A of the swing arm 223A. In this way, on the one hand, the swing arm 223A can prevent the magnetic element 224A from being misaligned, and on the other hand, the two magnetic flux concentrating walls 2234A can respectively block the side edges on the opposite sides of the magnetic element 224A, so as to further improve the magnetic flux concentrating effect and thus improve the magnetic utilization rate of the internal magnetic control mechanism 22A.

[0108] In this specific example of the resistance device 2000 of the present utility model, the magnetic flux concentrating wall 2234A of the swing arm 223A extends integrally outward from the side edge of the swing arm body 2233A, that is, the swing arm body 2233A and the magnetic flux concentrating wall 2234A of the swing arm 223A are of an integral structure. Specifically, after the opposite sides of a metal sheet (usually an iron sheet) are bent, pressure is applied to the metal sheet to make it have a corresponding arc to obtain the swing arm 223A. The unbent part of the metal sheet forms the curved and extended swing arm body 2233A after the pressure is applied to generate an arc, and the bent part of the metal sheet forms the curved and extended magnetic flux concentrating wall 2234A after the pressure is applied to generate an arc. Thus, the swing arm body 2233A and the magnetic flux concentrating wall 2234A are of an integral structure.

[0109] Continue to refer to the appendix Figure 21 、 Figure 23 and Figure 24, in this specific example of the ship brushing machine of the present utility model, the internal magnetic control mechanism 22A includes two of the swing arms 223A and two sets of the magnetic elements 224A. The swing arm pivot ends 2231A of the two swing arms 223A are respectively rotatably mounted on one side of the edge of the housing 221A in an adjacent manner, and the swing arm driven ends 2232A of the two swing arms 223A are respectively swingably arranged on the other side of the edge of the housing 221A in an adjacent manner, and each of the two swing arms 223A is provided with a set of the magnetic elements 224A. Correspondingly, the drive unit 222A includes one drive wheel 2221A and two connection elements 2222A. The drive wheel 2221A is located between the swing arm driven ends 2232A of the two swing arms 223A. One end portion of each connection element 2222A is respectively connected to the drive wheel 2221A, and the other end portion is respectively connected to the swing arm driven end 2232A of each swing arm 223A. When the drive wheel 2221A rotates, the drive wheel 2221A applies a force to the swing arm driven ends 2232A of the two swing arms 223A through the two connection elements 2222A, so as to be able to drive the two swing arms 223A to swing relative to the housing 221A in a symmetric manner.

[0110] In this specific example of the resistance device 2000 of the present utility model, the connection element 2222A is rigid. One end portion of the connection element 2222A is rotatably mounted on the swing arm driven end 2232A of the swing arm 223A, and the other end portion is rotatably mounted on the edge of the drive wheel 2221A. Thus, when the drive wheel 2221A rotates relative to the housing 221A, one end portion of the connection element 2222A generates a rotation relative to the drive wheel 2221A, and the other end portion generates a rotation relative to the swing arm 223A. In this way, the drive wheel 2221A simultaneously pulls the swing arm driven ends 2232A of the two swing arms 223A inward through the two connection elements 2222A to increase the distance between the magnetic element 224A and the flywheel 21A, or the drive wheel 2221A simultaneously pushes the swing arm driven ends 2232A of the two swing arms 223A outward through the two connection elements 2222A to decrease the distance between the magnetic element 224A and the flywheel 21A.

[0111] Appendix Figure 25 shows a variant example of the resistance device 2000. Different from the resistance device shown in Appendix Figures 15 to 24 shown, in Appendix Figure 25In this specific example of the resistance device 2000 shown, the resistance device 2000 further includes a generator 80A, the generator 80A is installed in the water tank 11A, and the rotor of the generator 80A is drivingly connected to the flywheel 21A. When the user drives the linkage shaft 30A to rotate through the force-bearing part of the rowing machine main body, on the one hand, the linkage shaft 30A drives the paddle mechanism 12A to rotate in the water storage cavity 111A of the water tank 11A, so that the water contained in the water storage cavity 111A of the water tank 11A provides resistance. On the other hand, the linkage shaft 30A drives the flywheel 21A to rotate, so that the flywheel 21A cuts the magnetic induction lines of the internal magnetic control mechanism 22A to provide resistance. On the other hand, the flywheel 21A drives the rotor of the generator 80A to rotate, so that the generator 80A generates electricity.

[0112] Preferably, the resistance device 2000 further includes a transmission belt 90A. One end of the transmission belt 90A is sleeved on the flywheel 21A, and the other end is sleeved on the rotor of the generator 80A. Thus, when the flywheel 21A is driven to rotate by the linkage shaft 30A, the flywheel 21A drives the rotor of the generator 80A to rotate through the transmission belt 90A, so that the generator 80A generates electricity.

[0113] Preferably, the resistance device 2000 further includes a tension pulley 100A. The tension pulley 100A is rotatably arranged in the water tank 11A, and the outer side of the transmission belt 90A abuts against the tension pulley 100A.

[0114] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the drawings are only examples and do not limit the present invention. The object of the present invention has been fully and effectively achieved. The function and structural principle of the present invention have been shown and described in the embodiments. Without departing from the principle, any deformation or modification of the embodiments of the present invention is possible.

Claims

1. A resistance device, characterized in that: include: A water resistance unit, wherein the water resistance unit comprises a water tank, a coil spring mechanism and a paddle mechanism, the water tank having a water storage chamber and a water tank through hole connected to the water storage chamber, the coil spring mechanism is rotatably disposed on the water tank outside the water tank, the paddle mechanism is rotatably disposed in the water storage chamber of the water tank, and the paddle mechanism is connected to the coil spring mechanism through the water tank through hole of the water tank; and A magnetic resistance unit, wherein the magnetic resistance unit includes a flywheel and an internal magnetic control mechanism, the flywheel has a flywheel space, the internal magnetic control mechanism is suspended in the flywheel space of the flywheel, wherein the flywheel and the paddle mechanism are linked, and when the paddle mechanism is driven to rotate in the water holding chamber of the water tank, the flywheel rotates relative to the internal magnetic control mechanism.

2. The resistance device according to claim 1, wherein the connecting shaft of the coil spring mechanism extends through the water tank through-hole of the water tank to the water holding chamber, and the paddle mechanism is installed on the connecting shaft of the coil spring mechanism so that the paddle mechanism is connected to the coil spring mechanism through the water tank through-hole of the water tank, wherein the magnetic resistance unit comprises a flange and an assembly shaft, the flange is fixedly mounted on one end of the assembly shaft, and the other end of the assembly shaft passes through the mechanism through-hole of the internal magnetic control mechanism and the flywheel through-hole of the flywheel respectively, and the flywheel is rotatable relative to the assembly shaft, and the flange and the assembly shaft cooperate with each other to suspend the internal magnetic control mechanism in the flywheel space of the flywheel, wherein the flywheel is drivably connected to the driving disk of the coil spring mechanism, so that while the connecting shaft of the coil spring mechanism drives the paddle mechanism to rotate in the water holding chamber of the water tank, the driving disk of the coil spring mechanism drives the flywheel to rotate relative to the internal magnetic control mechanism.

3. The resistance device according to claim 2, wherein the resistance device comprises a transmission belt, and opposite ends of the transmission belt are respectively mounted on the flywheel and the driving disk of the winding spring mechanism.

4. A resistance device according to claim 2 or 3, wherein the flywheel comprises a flywheel body and a conductor, the flywheel body forms the flywheel space and the flywheel through-hole, the conductor is arranged on the flywheel body and located in the flywheel space, wherein the internal magnetic control mechanism comprises a shell, a drive unit, a bent and extended swing arm and at least one magnetic element, the drive unit is arranged on the shell, the swing arm has a relative swing arm pivot end and a swing arm driven end, the swing arm pivot end of the swing arm is rotatably mounted on the edge of the shell, the swing arm driven end of the swing arm is drivably connected to the drive unit, and the magnetic element is arranged on the outside of the swing arm, wherein the internal magnetic control mechanism is suspended in the flywheel space of the flywheel in a manner that the magnetic element faces the conductor, and at least a portion of the conductor is located in the magnetic field environment of the magnetic element.

5. The resistance device according to claim 4, wherein the driving unit comprises a driving motor, a transmission gear set, a fan gear and a connecting rod, the driving motor is arranged on the housing, the fan gear is rotatably arranged on the housing, each transmission gear in the transmission gear set is rotatably mounted on the housing in a manner that adjacent transmission gears are meshed with each other, and one transmission gear in the transmission gear set is meshed with the worm of the driving motor, and the other transmission gear is meshed with the fan gear, and the opposite ends of the connecting rod are rotatably mounted on the fan gear and the driven end of the swing arm of the swing arm.

6. The resistance device according to claim 5, wherein the shell includes a first shell and a second shell, the first shell and the second shell are installed with each other to form an internal space and a peripheral opening connected to the internal space between the first shell and the second shell, the drive motor, the transmission gear set, the sector gear and the connecting rod are respectively located in the internal space of the shell, the magnetic element is adjacent to the peripheral opening of the shell, wherein the shell has a shell through hole and a threading hole, the shell through hole and the threading hole are respectively formed in the second shell, and the shell through hole and the threading hole are respectively formed in the second shell. The threading holes are all connected to the internal space of the shell, wherein the internal magnetic control mechanism includes a potentiometer, a circuit board and a wire, the fixed part of the potentiometer is fixedly installed on the second shell outside the shell, the rotating shaft of the potentiometer extends to the internal space of the shell through the shell through-hole of the shell and is inserted into the insertion hole of the fan gear, the circuit board is located in the internal space of the shell, one end of the wire is connected to the circuit board, and the other end extends from the internal space of the shell to the outside through the threading hole of the shell and is connected to the fixed part of the potentiometer.

7. The resistance device according to claim 6, wherein the second shell has a receiving groove and two elastic clamping arms, and the two elastic clamping arms are located on opposite sides of the receiving groove, and after the fixed part of the potentiometer is received in the receiving groove of the second shell, the two elastic clamping arms clamp the fixed part on opposite sides of the fixed part respectively.

8. The resistance device according to claim 7, wherein the fixed portion of the potentiometer has a limiting groove, and the end of one of the two elastic clamping arms is located in the limiting groove of the fixed portion.

9. The resistance device according to claim 1, wherein the resistance device includes a linkage shaft, the linkage shaft having a relative linkage shaft driven end and a linkage shaft assembly end, the middle portion of the linkage shaft is rotatably assembled on the water tank through-hole of the water tank, the linkage shaft assembly end of the linkage shaft extends to the water holding chamber of the water tank and is used to install the paddle mechanism, the linkage shaft driven end of the linkage shaft is exposed to the outside of the water tank and is used to install the coil spring mechanism, so that the paddle mechanism is connected to the coil spring mechanism through the water tank through-hole of the water tank, wherein the flywheel has a flywheel through-hole, and the internal magnetic control mechanism has a mechanism through-hole, wherein the linkage shaft passes through the flywheel through-hole of the flywheel and the mechanism through-hole of the internal magnetic control mechanism respectively, and the flywheel and the linkage shaft are fixed, and the internal magnetic control mechanism and the linkage shaft have a gap so that the linkage shaft can rotate relative to the internal magnetic control mechanism.

10. The resistance device according to claim 9, wherein the water tank has a mounting groove, and the magnetic resistance unit is located in the mounting groove of the water tank.

11. A resistance device according to claim 9 or 10, wherein the resistance device comprises a generator, the rotor of the generator being driveably connected to the flywheel.

12. The resistance device according to claim 11, wherein the resistance device comprises a transmission belt, and opposite ends of the transmission belt are respectively mounted on the rotor of the generator and the flywheel.

13. The resistance device according to claim 9 or 10, wherein the resistance device comprises an assembly frame, wherein the assembly frame comprises a top assembly portion, wherein the top assembly portion is located above the water tank, wherein the internal magnetic control mechanism is fixedly mounted on the top assembly portion.

14. A resistance device according to claim 9 or 10, wherein the flywheel comprises a flywheel body and a conductor, the flywheel body forms the flywheel space and the flywheel through-hole, the conductor is arranged on the flywheel body and located in the flywheel space, wherein the internal magnetic control mechanism comprises a housing, a driving unit, at least one swing arm and at least one group of magnetic elements, the driving unit comprises a driving wheel and at least one connecting element, the driving wheel is rotatably mounted on the housing, one end of the connecting element is rotatably mounted on the driving wheel, the swing arm has a swing arm pivot end and a swing arm driven end opposite to each other, the swing arm pivot end of the swing arm is rotatably mounted on the housing, the swing arm driven end of the swing arm and the other end of the connecting element are rotatably mounted, a group of the magnetic elements are arranged on the outside of the swing arm, wherein the internal magnetic control mechanism is suspended in the flywheel space of the flywheel in a manner that the magnetic element faces the conductor, and at least a portion of the conductor is located in the magnetic field environment of the magnetic element.

15. The resistance device according to claim 14, wherein the swing arm comprises a swing arm body and at least one magnetic focusing wall protrudingly arranged on the side of the swing arm body, the magnetic element is arranged on the swing arm body, and the magnetic focusing wall blocks at least a portion of the side of the magnetic element.

16. A rowing machine, characterized in that include: A rowing machine body, wherein the rowing machine body includes a frame and a seat slidably disposed on the frame; A pulling device, wherein the pulling device comprises a pulling belt and a handle disposed at one end of the pulling belt; as well as The resistance device according to any one of claims 1 to 15, wherein the other end of the pulling belt is wound around the coil spring mechanism of the resistance device.

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