Rowing machine

Abstract

The utility model discloses a rowing machine. The rowing machine comprises a rowing machine main body, a traction device and a resistance device, the rowing machine main body comprises a rack and a seat slidably arranged on the rack, the traction device comprises a traction belt and a handle arranged at one end of the traction belt, and the resistance device is arranged on the rack. The resistance device comprises a water resistance unit and a magnetic resistance unit connected to the water resistance unit, and the water resistance unit is operably connected to the other end of the traction belt. When a user uses the rowing machine for body building, the resistance device provides composite resistance so as to improve the body building effect of the user.

Description

Technical Field

[0001] The utility model relates to the field of fitness equipment, in particular to a rowing machine, wherein a water resistance unit of the rowing machine provides water resistance and a magnetic resistance unit provides magnetic resistance, so that the rowing machine provides combined resistance to help a user achieve a better fitness effect. Background Art

[0002] A rowing machine is a popular aerobic fitness device that relies on water resistance to provide an exercise load for a user. The principle of a water resistance rowing machine is to generate resistance by stirring water in a water tank with a paddle blade, and the magnitude of the resistance will change with the change of the rowing speed to simulate the feeling of real rowing. The defects of existing water resistance rowing machines are as follows. First, the water resistance device of the rowing machine can only provide a small amount of water resistance and cannot meet the needs of users for higher-intensity training. Second, the water resistance provided by the water resistance device of the rowing machine is difficult to be accurately controlled and cannot help users perform more accurate training. Summary of the Utility Model

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

[0004] An object of the utility model is to provide a rowing machine, wherein the rowing machine not only retains the authenticity and smoothness of water resistance, but also, by introducing magnetic resistance, enables the rowing machine to provide greater resistance and enables the resistance to be more accurately controlled. At the same time, the rowing machine can provide a more diverse, challenging and effective fitness method for users.

[0005] An object of the utility model is to provide a rowing machine, wherein the magnetic resistance unit has a smaller size, so that the rowing machine can integrate the magnetic resistance unit without changing the original design, which is beneficial to reducing the design cost and R & D cost of the rowing machine and is beneficial to the popularization of the rowing machine capable of providing combined resistance.

[0006] According to an aspect of the utility model, the utility model provides a rowing machine, which comprises:

[0007] A rowing machine main body, wherein the rowing machine main body comprises a frame and a seat slidably arranged on the frame;

[0008] A pulling device, wherein the pulling device comprises a pulling belt and a handle arranged at one end of the pulling belt; and

[0009] A resistance device, wherein the resistance device is disposed on the frame, and the resistance device includes a water resistance unit and a magnetic resistance unit connected to the water resistance unit, and the water resistance unit is operably connected to the other end of the traction belt.

[0010] According to an embodiment of the present invention, the water resistance unit includes a water tank, a spring winding mechanism, and a paddle mechanism. The water tank is disposed on the frame, and the water tank has a water storage cavity and a water tank perforation communicating with the top of the water storage cavity. The spring winding mechanism is rotatably disposed outside 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. One end of the traction belt is wound around the spring winding mechanism so that the water resistance unit is operably connected to the traction belt. Wherein the magnetic resistance unit includes a flywheel and an external magnetic control mechanism disposed adjacent to the flywheel. The flywheel is rotatably mounted on the frame and is drivingly connected to the driving disc of the spring winding mechanism. A part of the flywheel is located in the magnetic field environment of the external magnetic control mechanism.

[0011] According to an embodiment of the present invention, the external magnetic control mechanism includes a housing, a driving unit, a swing arm, and a set of magnetic elements. The housing has a housing space and a housing passage communicating with the housing space. The driving unit and the swing arm are both disposed in the housing space of the housing, and one end of the swing arm is rotatably mounted on the housing, and the other end is drivingly connected to the driving unit. The swing arm is driven by the driving unit to swing at a position adjacent to the housing passage of the housing. The magnetic elements are disposed on the swing arm, wherein the magnetic elements of the external magnetic control mechanism face the periphery of the flywheel.

[0012] According to an embodiment of the present invention, the external magnetic control mechanism includes a circuit board, the circuit board is disposed on the housing and not located in the housing space, and the driving unit is connected to the circuit board.

[0013] According to an embodiment of the present invention, the driving unit includes a driving motor, a transmission gear set, a sector gear, and a connecting rod. The driving motor is disposed on the housing. Each transmission gear in the transmission gear set is rotatably mounted on 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. The sector gear is meshed with another transmission gear in the transmission gear set. Opposite ends of the connecting rod are rotatably mounted on the sector gear and the swing arm respectively.

[0014] 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 flywheel and the driving disc of the spring winding mechanism.

[0015] According to an embodiment of the present utility model, the water resistance unit includes a water tank, a spring winding mechanism, and a paddle mechanism. The water tank is disposed on the frame, and the water tank has a water storage chamber and a water tank perforation communicating with the water storage chamber. 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 chamber 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 and the paddle mechanism are linked, and while the paddle mechanism is driven to rotate in the water storage chamber of the water tank, the flywheel rotates relative to the internal magnetic control mechanism.

[0016] According to an embodiment of the present utility model, the connecting shaft of the spring winding mechanism extends into the water storage chamber through the water tank perforation of the water tank, and the paddle mechanism is mounted 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 includes 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 passes through the mechanism perforation of the internal magnetic control mechanism and the 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 drivingly connected to the 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 chamber of the water tank, the driving disc of the spring winding mechanism drives the flywheel to rotate relative to the internal magnetic control mechanism.

[0017] 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, 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 outside 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.

[0018] 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. Description of the Drawings

[0019] Figure 1 is a perspective three-dimensional schematic diagram of a rowing machine according to a preferred embodiment of the present utility model.

[0020] Figure 2 is a perspective three-dimensional schematic diagram of another perspective of the rowing machine according to the above-mentioned preferred embodiment of the present utility model.

[0021] Figure 3 is an exploded schematic diagram of the rowing machine according to the above-mentioned preferred embodiment of the present utility model.

[0022] Figure 4 is a cross-sectional schematic diagram of the rowing machine according to the above-mentioned preferred embodiment of the present utility model.

[0023] Figure 5 is Figure 4 a partial position enlarged view.

[0024] Figure 6 is a perspective three-dimensional schematic diagram of a magnetic resistance unit of a resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present utility model.

[0025] Figure 7 It is a perspective 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 utility model.

[0026] Figure 8 It is an exploded schematic diagram of one 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.

[0027] Figure 9 It is a perspective 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 utility model.

[0028] Figure 10 It is a 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.

[0029] Figure 11 It is a perspective three-dimensional schematic diagram of another resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present utility model.

[0030] Figure 12 It is a sectional schematic diagram of the resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present utility model.

[0031] Figure 13 It is an exploded 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.

[0032] Figure 14 It is a 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 utility model.

[0033] Figure 15 It is a perspective 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 utility model.

[0034] Figure 16 It is an exploded schematic diagram of one 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 utility model.

[0035] Figure 17 It 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.

[0036] Figure 18 It is a perspective three-dimensional schematic diagram of one perspective of another resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present utility model.

[0037] Figure 19 It is a perspective three-dimensional schematic diagram of another perspective of the resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present utility model.

[0038] Figure 20 It is a sectional perspective schematic diagram of the resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present utility model.

[0039] Figure 21 It is Figure 20 an enlarged schematic diagram of a partial position.

[0040] Figure 22 It is a sectional perspective schematic diagram of the resistance device of the rowing machine according to the above-mentioned preferred embodiment of the present utility model from a planar perspective.

[0041] Figure 23 It is a perspective 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.

[0042] Figure 24 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 utility model.

[0043] Figure 25 It is a sectional perspective 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 from a planar perspective.

[0044] Figure 26 It 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.

[0045] Figure 27 It 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.

[0046] Figure 28 It 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 utility model. Detailed implementation manners

[0047] Before explaining any embodiments of the present invention in detail, it should be understood that the present invention is not limited in its application to the details of the construction and arrangement of components set forth 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," "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 connections or couplings.

[0048] Moreover, on the one hand, in the disclosure of the present invention, the orientation or positional relationship indicated by the terms "longitudinal," "lateral," "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. This 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 this element can be multiple. The term "a" should not be construed as limiting the quantity.

[0049] Appendix Figures 1 to 10A rowing machine according to a preferred embodiment of the present invention is shown, 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 1000 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 resistance device 2000 includes a water resistance unit 10 and a magnetic resistance unit 20 connected to the water resistance unit 10. The water resistance unit 10 is disposed on the frame 1001 and is connected to the other end of the pulling belt 3001. The magnetic resistance unit 20 is disposed on the frame 1001 and is connected to the water resistance unit 10. When the user sits on the seat 1002 and pedals on the frame 1001, if the user's legs exert force to change from a bent state to an extended state, causing the seat 1002 to slide relative to the frame 1001, the user can apply force to the water resistance unit 10 through the handle 3002 and the pulling belt 3001. The water resistance unit 10 provides water resistance. At the same time, the magnetic resistance unit 20 provides magnetic resistance. In this way, the water resistance unit 10 and the magnetic resistance unit 20 cooperate with each other to provide a combined resistance to help the user achieve a better fitness effect.

[0050] That is to say, different from the rowing machines in the prior art that can only provide water resistance, in this specific example of the rowing machine of the present invention shown in the appendix Figures 1 to 10 the rowing machine not only retains the authenticity and smoothness of water resistance, but also, by introducing magnetic resistance, enables the rowing machine to provide greater resistance and enables the resistance to be more precisely controlled. At the same time, the rowing machine can provide users with a more diverse, challenging, and effective fitness method.

[0051] 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.

[0052] Specifically, referring to the appendix Figures 1 to 5, the water resistance unit 10 includes a water tank 11, a paddle mechanism 12 and a clock spring mechanism 13. The water tank 11 has a water storage chamber 111 and a water tank perforation 112. The water tank perforation 112 communicates with the top of the water storage chamber 111. The paddle mechanism 12 is rotatably arranged in the water storage chamber 111 of the water tank 11. The clock spring mechanism 13 is rotatably installed on the top of the water tank 11, and the clock spring mechanism 13 has a connecting shaft 131. The connecting shaft 131 extends through the water tank perforation 112 of the water tank 11 into the water storage chamber 111. The paddle mechanism 12 is installed on the connecting shaft 131 of the clock spring mechanism 13, and the paddle mechanism 12 is suspended in the water storage chamber 111 of the water tank 11 by the connecting shaft 131 of the clock spring mechanism 13. The clock spring mechanism 13 further has a belt disc 132. One end of the pulling belt 3001 is wound around the belt disc 132 of the clock spring mechanism 13, so that the water resistance unit 10 is connected to the end of the pulling belt 3001. The belt disc 132 of the clock spring mechanism 13 is fixedly arranged in the middle of the connecting shaft 131. For example, in some embodiments, the belt disc 132 and the connecting shaft 131 are an integral structure.

[0053] Preferably, the top of the connecting shaft 131 of the clock spring mechanism 13 is rotatably installed on the frame 1001. For example, the top of the connecting shaft 131 of the clock spring mechanism 13 can be rotatably installed on the frame 1001 through a bearing. More preferably, the middle of the connecting shaft 131 of the clock spring mechanism 13 can be installed on the water tank 11 through a bearing, so as to prevent the connecting shaft 131 of the clock spring mechanism 13 from shaking during rotation.

[0054] When the user applies force to the clock spring mechanism 13 through the pulling belt 3001, on the one hand, the belt disc 132 of the clock spring mechanism 13 drives the clock spring to deform and store elastic potential energy, and this elastic potential energy can enable the clock spring mechanism 13 to return to its initial state. On the other hand, the connecting shaft 131 of the clock spring 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.

[0055] Continue to refer to the appendix Figures 4 to 10 , the clock spring mechanism 13 further has a driving disc 133. The driving disc 133 is arranged in the middle of the connecting shaft 131. For example, in some embodiments, the driving disc 133 and the connecting shaft 131 are an integral structure.

[0056] The magnetoresistive unit 20 includes a flywheel 21 and an external magnetic control mechanism 22 disposed adjacent to the flywheel 21. The flywheel 21 is rotatably mounted on the frame 1001 and is drivingly connected to the driving disk 133 of the clockwork spring mechanism 13. A part of the flywheel 21 is located in the magnetic field environment of the external magnetic control mechanism 22. While the paddle mechanism 12 is driven to rotate in the water tank 111 of the water tank 11, the flywheel 21 rotates relative to the external magnetic control mechanism 22. At this time, the flywheel 21 cuts the magnetic induction lines of the external magnetic 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.

[0057] Preferably, in Figures 1 to 10 In this specific example of the rowing machine of the present invention shown in the attached

[0058] In Figures 1 to 10 In this specific example of the rowing machine of the present invention shown in the attached

[0059] The external magnetic control mechanism 22 includes a housing 221, a driving unit 222, a swing arm 223, and a set of magnetic elements 224. The housing 221 has a housing space 2211 and a housing passage 2212, and the housing passage 2212 communicates with the housing space 2211. The driving unit 222 and the swing arm 223 are both disposed in the housing space 2211 of the housing 221, and one end of the swing arm 223 is rotatably mounted on the housing 221, and the other end is drivingly connected to the driving unit 222. The driving unit 222 drives the swing arm 223 to swing at a position adjacent to the housing passage 2212 of the housing 221. The magnetic element 224 is disposed on the swing arm 223, and the magnetic element 224 is used to provide a magnetic field environment. The magnetic element 224 of the external magnetic control mechanism 22 faces the periphery of the flywheel 21, so that a part of the flywheel 21 is located in the magnetic field environment of the external magnetic control mechanism 22.

[0060] After the driving unit 222 drives the swing arm 223 and the magnetic element 224 to swing in the direction close to the flywheel 21, the distance between the magnetic element 224 and the flywheel 21 is reduced, and the magnetic resistance unit 20 can provide a 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 the direction away from the flywheel 21, the distance between the magnetic element 224 and the flywheel 21 is increased, and at this time the magnetic resistance unit 20 can provide a smaller resistance, that is, the user can drive the flywheel 21 to rotate with less force. That is to say, by changing the distance between the magnetic element 224 and the flywheel 21, 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.

[0061] Refer to the appendix Figure 4 and Figure 5 , the housing 221 can be mounted on the frame 1001 by, but not limited to, screws to fixedly mount the external magnetic control mechanism 22 on the frame 1001.

[0062] Refer to the appendix Figures 8 to 10, the driving unit 222 of the external magnetic control mechanism 22 includes a driving motor 2223, a transmission gear set 2224, a sector gear 2225 and a connecting rod 2226. The driving motor 2223 is arranged on the housing 221. Each transmission gear 22241 in the transmission gear set 2224 is rotatably installed on the housing 221 in such a way that adjacent transmission gears 22241 mesh with each other. And one transmission gear 22241 in the transmission gear set 2224 meshes with the worm 22231 of the driving motor 2223. The sector gear 2225 meshes with another transmission gear 22241 in the transmission gear set 2224. Opposite ends of the connecting rod 2226 are respectively rotatably installed on the sector gear 2225 and the swing arm 223.

[0063] When the driving motor 2223 outputs power in such a way that the worm 22231 rotates in one direction, this power is transmitted to the sector gear 2225 through these transmission gears 22241 to drive the sector gear 2225 to rotate in one direction. The rotating sector gear 2225 pushes the swing arm 223 to swing towards the direction close to the flywheel 21 through the connecting rod 2226, so as to reduce the distance between the magnetic element 224 and the flywheel 21. When the driving motor 2223 outputs power in such a way that the worm 22231 rotates in the other direction, this power is transmitted to the sector gear 2225 through these transmission gears 22241 to drive the sector gear 2225 to rotate in the other direction. The rotating sector gear 2225 pulls the swing arm 223 to swing towards the direction away from the flywheel 21 through the connecting rod 2226, so as to increase the distance between the magnetic element 224 and the flywheel 21.

[0064] That is to say, the transmission gear set 2224 and the sector gear 2225 can convert the rotational motion of the worm 22231 of the driving motor 2223 into the swinging motion of the swing arm 223, and increase the torque during the process of these transmission gears 22241 conducting power. In addition, the arrangement of the transmission gear set 2224 and the sector gear 2225 can reasonably layout the driving motor 2223 and the swing arm 223, which is beneficial to the miniaturization of the external magnetic control mechanism 22. In this way, the magnetoresistive unit 20 can have a smaller size, so that the rowing machine can integrate the magnetoresistive unit 20 without changing the original design, which is beneficial to reducing the design cost and R & D cost of the rowing machine and is beneficial to the popularization of the rowing machine capable of providing composite resistance.

[0065] Further, the housing 221 includes a first housing 2215 and a second housing 2216, and the first housing 2215 and the second housing 2216 are installed with each other to form the housing space 2211 and the housing passage 2212 therebetween, wherein opposite sides of one end of the swing arm 223 are respectively rotatably installed on the first housing 2215 and the second housing 2216, so that this end of the swing arm 223 is rotatably installed on the housing 221.

[0066] It is worth mentioning that the installation manner of the first housing 2215 and the second housing 2216 is not limited in the rowing machine of the present utility model. For example, in this specific example of the rowing machine of the present utility model, referring to the attached Figures 6 to 9 , the first housing 2215 and the second housing 2216 are installed with each other by a set of screws.

[0067] Continuing to refer to the attached Figures 7 to 9 , the external magnetic control mechanism 22 further includes a circuit board 226, the circuit board 226 is arranged in the housing 221, and the driving unit 222 is connected to the circuit board 226.

[0068] Further referring to the attached Figure 2 , Figure 4 and Figure 5 , the rowing machine further includes an encoder 4000, the encoder 4000 is operably arranged on the frame 1001, and the encoder 4000 is connected to the circuit board 226 of the external magnetic control mechanism 22. A user can send a coding instruction to the circuit board 226 through the encoder 4000. For example, the user can turn the knob of the encoder 4000 to make the encoder 4000 generate a corresponding instruction and send it to the circuit board 226, and the circuit board 226 controls the working state of the driving unit 222 when executing this instruction to drive the swing arm 223 and the magnetic element 224 to swing.

[0069] Preferably, in this specific example of the rowing machine of the present utility model shown in the attached Figures 1 to 10 , the circuit board 226 is arranged outside the housing 221, that is, the circuit board 226 is not located in the housing space 2211 of the housing 221. In this way, it is convenient to repair the circuit board 226.

[0070] Referring to the attached Figure 7, the first housing 2215 of the housing 221 has two spaced-apart extending legs 22151 and a plate space 22152 located between the two extending legs 22151. Opposite ends of the circuit board 226 are respectively clamped to the two extending legs 22151 of the first housing 2215, and the circuit board 226 can be located in the plate space 22152. In this way, not only can the circuit board 226 be disposed outside the housing 221, but also the two extending legs 22151 of the first housing 2215 can protect the circuit board 226.

[0071] That is to say, in this specific example of the rowing machine of the present invention shown in the attached Figures 1 to 10 figure, although the circuit board 226 is disposed outside the housing 221, since the housing 221 forms the plate space 22152 between the two extending legs 22151, and the circuit board 226 is disposed in the plate space 22152 in such a way that opposite ends are respectively clamped to the two extending legs 22151, the circuit board 226 can be effectively protected from being collided and scratched.

[0072] During the operation of the drive motor 2223 to drive the swing arms 223 and the magnetic elements 224 to swing, in order to detect the swing positions of the swing arms 223 and the magnetic elements 224, the external magnetic control mechanism 22 further includes a potentiometer 225. The fixed part 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 installed on the sector gear 2225. When the sector gear 2225 rotates, it drives the rotating shaft 2251 of the potentiometer 225 to rotate synchronously 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 positions of the swing arms 223 and the magnetic elements 224 correspond one by one. Therefore, by detecting the resistance value of the potentiometer 225, the swing positions of the swing arms 223 and the magnetic elements 224 can be determined, and further the resistance that the resistance device 2000 can provide can be obtained. Continue to refer to the attached Figures 1 to 5, the rowing machine main body 1000 further includes a first guide wheel 1003, a second guide wheel 1004, and a third guide wheel 1005 that are respectively rotatably mounted on the frame 1001. 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, and 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 substantially "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 coil spring 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 coil spring mechanism 13.

[0073] Appendix Figures 1 to 10 The working process of the rowing machine shown in the figure is as follows: When the user sits on the seat 1002 and bends the legs to pedal the frame 1001, the user's hands hold the handle 3002. At this time, if the user straightens the legs and makes the seat 1002 slide backward, under the guiding action of the first guide wheel 1003, the second guide wheel 1004, and the third guide wheel 1005, the user can pull the connecting shaft 131, the belt reel 132, and the driving disc 133 of the coil spring mechanism 13 to rotate synchronously through the pulling belt 3001. Thus: on the one hand, the coil spring of the coil spring mechanism 13 deforms and stores elastic potential energy; on the other hand, the coil spring mechanism 13 drives the paddle mechanism 12 to rotate in the water storage cavity 111 of the water tank 11, so that the water in the water storage cavity 111 generates resistance to the paddle mechanism 12, thereby enabling the water resistance unit 10 to provide water resistance. On the other hand, the driving disc 133 drives the flywheel 21 to rotate through the transmission belt 110, so that the flywheel 21 cuts the magnetic induction lines of the external magnetic control mechanism 22 to provide magnetic resistance, thereby enabling the magnetic resistance unit 20 to provide magnetic resistance. When the user bends the legs, during the process of the coil spring mechanism 13 returning to the initial state, the pulling belt 3001 is wound on the coil spring mechanism 13 for the user to pull again. Repeating this way, the user can get exercise. It can be seen that during the process of the user using the rowing machine for fitness, the water resistance unit 10 and the magnetic resistance unit 20 of the resistance device 2000 of the rowing machine can provide composite resistance to help the user achieve a better fitness effect.

[0074] When the user hopes that the resistance device 2000 provides greater resistance, the user can rotate the knob of the encoder 4000, and the encoder 4000 sends an encoded instruction to the circuit board 226. During the execution of the encoded instruction, the circuit board 226 drives the swing arm 223 and the magnetic element 224 to swing towards the direction close to the flywheel 21 through the drive unit 222, so as to reduce the distance between the magnetic element 224 and the flywheel 21. Correspondingly, when the user hopes that the resistance device 2000 provides smaller resistance, the user can rotate the knob of the encoder 4000, and the encoder 4000 sends an encoded instruction to the circuit board 226. During the execution of the encoded instruction, the circuit board 226 drives the swing arm 223 and the magnetic element 224 to swing away from the flywheel 21 through the drive unit 222, so as to increase the distance between the magnetic element 224 and the flywheel 21.

[0075] Attached Figures 11 to 17 shows the specific structure of another magnetic resistance device 2000. Different from the magnetic resistance device 2000 of the rowing machine shown in the attached Figures 1 to 10 is the specific structure of the magnetic resistance unit 20.

[0076] Specifically, referring to the attached Figures 11 to 17 , the magnetic resistance unit 20A includes a flywheel 21A and an internal magnetic control mechanism 22A. The flywheel 21A has a flywheel space 211A, and the internal magnetic control mechanism 22A is suspended in the flywheel space 211A of the flywheel 21A. The internal magnetic control mechanism 22A provides a magnetic field environment, and a part of the flywheel 21A is located in the magnetic field environment of the internal magnetic control mechanism 22A. The flywheel 21A is arranged to be able to rotate relative to the internal magnetic control mechanism 22A.

[0077] The flywheel 21A of the magnetic resistance unit 20A is linked with the paddle mechanism 12 of the water resistance unit 10. That is, when the paddle mechanism 12 is driven to rotate in the water storage cavity 111 of the water tank 11, the flywheel 21A rotates relative to the internal magnetic control mechanism 22A. At this time, the flywheel 21A cuts the magnetic induction lines of the internal magnetic control mechanism 22A to provide magnetic resistance. In this way, the water resistance unit 10 and the magnetic resistance unit 20A cooperate with each other to provide composite resistance to help the user achieve a better fitness effect.

[0078] In the attached Figures 11 to 17In the rowing machine of the present utility model shown, the flywheel 21A of the magnetic resistance unit 20A is drivingly connected to the driving disc 133 of the spring winding mechanism 13 of the water resistance unit 10. In this way, the flywheel 21A and the paddle mechanism 12 are linked, so that when the paddle mechanism 12 is driven by the connecting shaft 131 of the spring winding mechanism 13 to rotate in the water storage chamber 111 of the water tank 11, the flywheel 21A is driven by the driving disc 133 of the spring winding mechanism 13 to rotate relative to the internal magnetic control mechanism 22A. Preferably, the opposite ends of the transmission belt 110 are respectively sleeved on the driving disc 133 of the spring winding mechanism 13 and the flywheel 21A, so that the flywheel 21A is drivingly connected to the driving disc 133 of the spring winding mechanism 13. That is to say, the flywheel 21A and the paddle mechanism 12 are not coaxial. In this way, the speed ratio can be increased, and the resistance can be increased on the basis of reducing the volume of the resistance device 2000.

[0079] Refer to the attached Figure 13 and Figure 14 , the flywheel 21 has a flywheel through hole 210A, the flywheel through hole 210A communicates with the flywheel space 211A, the internal magnetic control mechanism 22A has a mechanism through hole 220A. After the internal magnetic control mechanism 22A is suspended in the flywheel space 211A of the flywheel 21A, the positions of the flywheel through hole 210A of the flywheel 21A and the mechanism through hole 220A of the internal magnetic control mechanism 22A correspond. The magnetic resistance unit 20A includes a flange 23A and an assembly shaft 24A. The flange 23A is fixedly sleeved on one end of the assembly shaft 24A and fixedly installed on the internal magnetic control mechanism 22A. The other end of the assembly shaft 24A passes through the mechanism through hole 220A of the internal magnetic control mechanism 22A and the flywheel through hole 210A of the flywheel 21A respectively, and the flywheel 21A is rotatable relative to the assembly shaft 24A. For example, the inner side of the bearing of the bearing 120 can be fixedly sleeved on the assembly shaft 24A, and the outer side of the bearing can be fixedly installed on the flywheel through hole 210A of the flywheel 21A, so that the flywheel 21A is rotatable relative to the assembly shaft 24A. The flange 23A and the assembly shaft 24A cooperate with each other to suspend the internal magnetic control mechanism 22A in the flywheel space 211A of the flywheel 21A, wherein the opposite ends of the assembly shaft 24A are installed on the frame 1001.

[0080] Refer to the attached Figures 11 to 17, the flywheel 21A includes a flywheel body 212A and a conductor 213A. The flywheel space 211A and the flywheel perforation 210A of the flywheel 21A are formed in the flywheel body 212A. The conductor 213A is disposed on the flywheel body 212A and is located in the flywheel space 211A of the flywheel 21A.

[0081] The internal magnetic control mechanism 22A includes a housing 221A, a driving unit 222A, a bent and extended swing arm 223A, and at least one magnetic element 224A. The mechanism perforation 220A of the internal magnetic control mechanism 22A is formed in the housing 221A. The flange 23A is fixedly mounted on the housing 221A. 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 which 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. The magnetic element 224A is disposed outside the swing arm 223A, and the magnetic element 224A provides a magnetic field environment. The internal magnetic control mechanism 22A is suspended in the flywheel space 211A of the flywheel 21A with the magnetic element 224A facing the conductor 213A of the flywheel 21A, and at least a part of the conductor 213A is located in the magnetic field environment of the magnetic element 224A. When the flywheel 21A is driven to rotate relative to the internal magnetic control mechanism 22A, the conductor 213A of the flywheel 21A cuts the magnetic induction lines of the magnetic element 224A of the internal magnetic control mechanism 22A to generate eddy currents. In this way, the magnetic resistance unit 20A provides magnetic resistance.

[0082] After the driving unit 222A drives the swing arm 223A and the magnetic element 224A to swing in the direction approaching the conductor 213A of the flywheel 21A, 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, that is, the user needs to use 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 in the direction away from the conductor 213A of the flywheel 21A, 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 less 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.

[0083] Continue to refer to the attached Figure 14 As shown, the flywheel body 212 includes a wheel disc 2121A, a wheel ring 2122A, and a sleeved ring 2123A. The wheel ring 2122A extends integrally from the edge of the wheel disc 2121A to one side of the wheel disc 2121A. The sleeved ring 2123A extends integrally from the middle of the wheel disc 2121A to the other side of the wheel disc 2121A. The flywheel space 211A of the flywheel 21A is formed between the wheel ring 2122A and the wheel disc 2121A. The flywheel perforation 210A of the flywheel 21A 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 is located in the flywheel space 211A of the flywheel 21A. One end of the transmission belt 110A is sleeved on the sleeved ring 2123A.

[0084] In a specific example of the rowing machine of the present invention, the conductor 213A may be an aluminum ring, and 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 is located in the flywheel space 211A.

[0085] Further, refer to the attached Figure 14, the housing 221A has an internal space 2211A and a peripheral opening 2212A communicating with the internal space 2211A, and the housing 221A includes a first housing 2215A and a second housing 2216A, and the first housing 2215A and the second housing 2216A are mounted to each other to form the internal space 2211A and the peripheral opening 2212A between the first housing 2215A and the second housing 2216A.

[0086] The driving unit 222A, the swing arm 223A, and the magnetic element 224A are all located in the internal space 2211A of the housing 221A, and the magnetic element 224A is adjacent to the peripheral opening 2212A of the housing 221A. After the internal magnetic control mechanism 22A is suspended in the flywheel space 211A of the flywheel 21A through the flange 23A and the assembly shaft 24A, the peripheral opening 2212A of the housing 221A of the internal magnetic control mechanism 22A faces the conductor 213A of the flywheel 21A, so that the magnetic element 224A faces the conductor 213A.

[0087] That is to say, after the internal magnetic control mechanism 22A is suspended in the flywheel space 211A of the flywheel 21A through the flange 23A and the assembly shaft 24A, the conductor 213A surrounds the outside of the peripheral opening 2212A of the housing 221A. Since the magnetic element 224A is adjacent to the peripheral opening 2212A of the housing 221A, the magnetic element 224A can face the conductor 213A and allow at least a part of the conductor 213A to be in the magnetic field environment of the magnetic element 224A. In this way, when the flywheel 21A is driven to rotate around the assembly shaft 24A, the conductor 213A of the flywheel 21A can cut the magnetic induction lines of the magnetic element 224A of the internal magnetic control mechanism 22A to generate eddy currents, so that the magnetic resistance unit 20A provides magnetic resistance.

[0088] Refer to the appendix Figure 16 and Figure 17, the driving unit 222A includes a driving motor 2223A, a transmission gear set 2224A, a sector gear 2225A, and a connecting rod 2226A. The driving motor 2223A is disposed in the housing 221A, wherein each transmission gear 22241A in the transmission gear set 2224A is rotatably mounted in the housing 221A in a manner that adjacent transmission gears 22241A mesh with each other, and one transmission gear 22241A in the transmission gear set 2224A meshes with the worm 22231A of the driving motor 2223A. The sector gear 2225A is rotatably mounted in the housing 221A, and the sector gear 2225 meshes with another transmission gear 22241A in the transmission gear set 2224. Opposite ends of the connecting rod 2226A are respectively rotatably mounted on the sector gear 2225A and the driven end 2232A of the swing arm 223A of the swing arm 223A.

[0089] When the worm 22231A of the driving motor 2223A rotates in one direction, after the transmission gear set 2224A transmits the power output by the driving motor 2223A to the sector gear 2225A, the sector gear 2225A rotates in one direction. At this time, the sector gear 2225A drives the swing arm 223A and the magnetic element 224A to swing towards the direction close to the conductor 213A through the connecting rod 2226A. Correspondingly, when the worm 22231A of the driving motor 2223A rotates in the opposite direction, after the transmission gear set 2224A transmits the power output by the driving motor 2223A to the sector gear 2225A, the sector gear 2225A rotates in the opposite direction. At this time, the sector gear 2225A drives the swing arm 223A and the magnetic element 224A to swing away from the conductor 213A through the connecting rod 2226A. That is to say, the swinging direction of the swing arm 223A and the magnetic element 224A can be controlled by controlling the rotation direction of the worm 22231A of the driving motor 2223A.

[0090] In the appendix Figures 11 to 17In this specific example of the rowing machine of the present utility model shown, the drive motor 2223A can be locked to the second housing 2216A by screws, and the drive motor 2223 is located in the internal space 2211A of the outer housing 221A. Relative sides of each transmission gear 22241A in the transmission gear set 2224A and the sector gear 2225A are rotatably mounted on the first housing 2215A and the second housing 2216A, so that the transmission gear set 2224A and the sector gear 2225A are rotatably arranged in the outer housing 221A and located in the internal space 2211A of the outer housing 221A.

[0091] Relative sides of the swing arm pivot end 2231A of the swing arm 223A are respectively rotatably mounted on the edge of the first housing 2215A and the edge of the second housing 2216A, so that the swing arm pivot end 2231A of the swing arm 223A is rotatably arranged on the edge of the outer housing 221A, thereby enabling the swing arm 223A to swing in the internal space 2211A of the outer housing 221A.

[0092] Refer to the appendix Figure 16 and Figure 17 Refer to the appendix

[0093] Refer to the appendix Figure 14 The internal magnetic control mechanism 22A further includes a circuit board 226A. The circuit board 226A is arranged in the internal space 2211A of the outer housing 221A, and the drive motor 2223A of the drive 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 drive motor 2223A. For example, the circuit board 226A can control the rotation direction of the worm 22231A of the drive motor 2223A. Preferably, the circuit board 226A can be locked to the second housing 2216A by screws, so that the circuit board 226A can be stably arranged in the internal space 2211A of the outer housing 221A.

[0094] Specifically, the fixed part 2252A of the potentiometer 225A is disposed on the outer shell 221A and connected to the circuit board 226A. The rotating shaft 2251A of the potentiometer 225A is installed on the sector gear 2225A. When the worm 22231A of the driving motor 2223A rotates to cause the transmission gear set 2224A to transmit power to the sector gear 2225A, the sector gear 2225A 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 sector gear 2225A, 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.

[0095] Further, referring to the attached Figures 14 to 16 figure, the outer shell 221A has a housing through-hole 2214A and a wire threading hole 2217A. The housing through-hole 2214A and the wire threading hole 2217A are respectively formed in the second housing 2216A and communicate with the internal space 2211A of the outer shell 221A. Wherein the fixed part 2252A of the potentiometer 225A is fixedly installed on the second housing 2216A outside the outer shell 221A. The rotating shaft 2251A of the potentiometer 225A extends to the internal space 2211A of the outer shell 221A through the housing through-hole 2214A of the outer shell 221A, and the rotating shaft 2251A is inserted into the insertion hole 22251A of the sector gear 2225A, so that the rotating shaft 2251A is installed on the sector gear 2225A. One end of the wire 227A of the internal magnetic control mechanism 22A is connected to the circuit board 226A, and the other end extends from the internal space 2211A of the outer shell 221A to the outside of the outer shell 221A through the wire threading hole 2217A of the outer shell 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 226A.

[0096] Preferably, referring to the attached Figure 14 and Figure 15, the second housing 2216A has a receiving groove 22161A, and the housing through hole 2214A and the wire threading hole 2217A of the outer housing 221A communicate with the receiving groove 22161A of the second housing 2216A respectively. Wherein the fixed part 2252A of the potentiometer 225A is received in the receiving groove 22161A of the second housing 2216A to prevent the potentiometer 225A from protruding outward.

[0097] Further, continue to refer to the attached Figure 14 and Figure 15 , the second housing 2216A has two elastic clamping arms 22162A, and the two elastic clamping arms 22162A are located on opposite sides of the receiving groove 22161A. Wherein, during the process of inserting the potentiometer 225A into the receiving groove 22161A of the second housing 2216A, the fixed part 2252A of the potentiometer 225A pushes the two elastic clamping arms 22162A to deform in opposite directions, so that the two elastic clamping arms 22162A accumulate elastic potential energy. After the potentiometer 225A is inserted into the receiving groove 22161A of the second housing 2216A, the two elastic clamping arms 22162A automatically reset to clamp the fixed part 2252A of the potentiometer 225A, so that the potentiometer 225A is reliably installed on the second housing 2216A.

[0098] Attached Figures 18 to 27 shows another specific example of the resistance device 2000, wherein the resistance device 2000 includes a water resistance unit 10B, a magnetic resistance unit 20B and a linkage shaft 30B.

[0099] Specifically, refer to FIGS. 18 to Figure 20, the water resistance unit 10B includes a water tank 11B and a paddle mechanism 12B. The water tank 11B has a water storage chamber 111B and a water tank perforation 112B communicating with the water storage chamber 111B. The linkage shaft 30B has a driven end 31B and an assembly end 32B of the linkage shaft opposite to each other. The middle part of the linkage shaft 30B is rotatably assembled in the water tank perforation 112B of the water tank 11B. The driven end 31B of the linkage shaft 30B is exposed outside the water tank 11B, and the assembly end 32B of the linkage shaft 30B is located in the water storage chamber 111B of the water tank 11B. The paddle mechanism 12B is fixedly installed at the assembly end 32B of the linkage shaft 30B, so that the paddle mechanism 12B is suspended in the water storage chamber 111B of the water tank 11B by the linkage shaft 30B. The driven end 31B of the linkage shaft 30B is drivably connected to the pulling belt 3001 of the pulling device 3000. For example, a torsion spring mechanism can be installed at the driven end 31B of the linkage shaft 30B, and the torsion spring mechanism is connected to the pulling belt 3001, so that the driven end 31B of the linkage shaft 30B is drivably connected to the pulling belt 3001 of the pulling device 3000. The user can drive the linkage shaft 30B to rotate through the pulling belt 3001 of the pulling device 3000. The linkage shaft 30B drives the paddle mechanism 12B to rotate in the water storage chamber 111B of the water tank 11B. The water in the water storage chamber 111B of the water tank 11B has resistance to the paddle mechanism 12B, so that the water resistance unit 10B provides water resistance to help the user achieve the purpose of fitness.

[0100] Continue to refer to the attached Figures 18 to 20 , the water tank 11B includes a bottom shell 113B and a top cover 114B. The top cover 114B is installed on the bottom shell 113B, and the water storage chamber 111B of the water tank 11B is formed between the bottom shell 113B and the top cover 114B. The installation method of the bottom shell 113B and the top cover 114B 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 113B and the top cover 114B. It can be understood that by sealing the installation positions of the bottom shell 113B and the top cover 114B, the water contained in the water storage chamber 111B of the water tank 11B can be prevented from overflowing through the installation positions of the bottom shell 113B and the top cover 114B.

[0101] The water tank perforation 112B of the water tank 11B is formed in the top cover 114B, so that the driven end 31B of the linkage shaft 30B of the linkage shaft is exposed at the top of the water tank 11B. In this way, the traction belt 3001 of the traction device 3000 can drive the linkage shaft 30B to rotate at the top of the water tank 11B. Preferably, the water tank perforation 112B of the water tank 11B is formed in the middle of the top cover 114B.

[0102] Reference appendix Figures 20 to 27 As shown, the reluctance unit 20B includes a flywheel 21B and an internal magnetic control mechanism 22B. The flywheel 21B has a flywheel space 211B and a flywheel perforation 210B communicating with the flywheel space 211B. The flywheel 21B is fixedly sleeved on the driven end 31B of the linkage shaft 30B in such a way that the linkage shaft 30B passes through the flywheel perforation 210B. The internal magnetic control mechanism 22B has a mechanism perforation 220B, and the internal magnetic control mechanism 22B is rotatably sleeved on the driven end 31B of the linkage shaft 30B in such a way that the linkage shaft 30B passes through the mechanism perforation 220B, and the linkage shaft 30B suspends the internal magnetic control mechanism 22B in the flywheel space 211B of the flywheel 21B. It can be understood that since the paddle mechanism 12B is fixedly installed on the assembly end 32B of the linkage shaft 30B and the flywheel 21B is fixedly sleeved on the driven end 31B of the linkage shaft 30B, the flywheel 21B and the paddle mechanism 12B are linked. That is, while the paddle mechanism 12B is driven to rotate in the water storage chamber 111B of the water tank 11B, the flywheel 21B rotates relative to the internal magnetic control mechanism 22B. In this way, the water resistance unit 10B provides water resistance and the magnetic resistance unit 20B provides magnetic resistance, so that the resistance device 2000 provides composite resistance.

[0103] Specifically, when the linkage shaft 30B rotates, on the one hand, the linkage shaft 30B drives the paddle mechanism 12B to rotate in the water storage chamber 111B of the water tank 11B, so that the water contained in the water storage chamber 111B of the water tank 11B provides resistance. At this time, the water resistance unit 10B provides water resistance. On the other hand, the linkage shaft 30B drives the flywheel 21B to rotate, so that the flywheel 21B cuts the magnetic induction lines of the internal magnetic control mechanism 22B. At this time, the magnetic resistance unit 20B provides magnetic resistance, so that the resistance device 2000 provides composite resistance to help the user achieve a better fitness effect.

[0104] Reference appendix Figure 20 and Figure 21, the resistance device 2000 further includes a first assembly unit 40B, the first assembly unit 40B includes a first assembly body 41B and at least one first bearing 42B, the first assembly body 41B has a first assembly channel 411B, the first bearing 42B is fitted in the first assembly channel 411B of the first assembly body 41B, the outer side of the bearing of the first bearing 42B is fixedly installed on the first assembly body 41B, the inner side of the bearing of the first bearing 42B is fixedly sleeved on the linkage shaft 30B, and the first assembly body 41B is fixedly installed on the water tank perforation 112B of the water tank 11B, so that the middle part of the linkage shaft 30B is rotatably assembled in the water tank perforation 112B of the water tank 11B.

[0105] Preferably, the first assembly unit 40B includes two first bearings 42B, and the two first bearings 42B are respectively sleeved at different height positions of the linkage shaft 30B. In this way, when the user uses the rowing machine for fitness, the two first bearings 42B can prevent the linkage shaft 30B from shaking and tilting, so that the linkage shaft 30B rotates around its own axis.

[0106] Continue to refer to the appendix Figures 20 to 21 , the resistance device 2000 further includes a second assembly unit 50B, the second assembly unit 50B includes a second assembly body 51B and at least one second bearing 52B, the second assembly body 51B has a second assembly channel 511B, the second bearing 52B is fitted in the second assembly channel 511B of the second assembly body 51B, the outer side of the bearing of the second bearing 52B is fixedly installed on the second assembly body 51B, the inner side of the bearing of the second bearing 52B is fixedly sleeved on the linkage shaft 30B, and the second assembly body 51B is fixedly installed on the inner magnetic control mechanism 22B, so that the inner magnetic control mechanism 22B is rotatably sleeved on the driven end 31B of the linkage shaft 30B of the linkage shaft 30B in such a way that the linkage shaft 30B penetrates through the mechanism perforation 220B. That is to say, the linkage shaft 30B can rotate in the mechanism perforation 220B of the inner magnetic control mechanism 22B.

[0107] Preferably, a part of the second assembly body 51B extends into the mechanism perforation 220B of the inner magnetic control mechanism 22B, and the shape and size of the part of the second assembly body 51B extending into the mechanism perforation 220B of the inner magnetic control mechanism 22B match the shape and size of the mechanism perforation 220B of the inner magnetic control mechanism 22B. In this way, when the user uses the rowing machine for fitness, the rowing machine can prevent the second assembly body 51B from shaking relative to the inner magnetic control mechanism 22B, so as to ensure the reliability and stability of the rowing machine.

[0108] Continue to refer to the attached Figure 20 and Figure 21 The resistance device 2000 further includes an assembly frame 60B. The assembly frame 60B includes a top assembly part 61B. The top assembly part 61B is located above the water tank 11B, and the top assembly part 61B is configured to keep its position relative to the water tank 11B unchanged. Wherein the inner magnetic control mechanism 22B is fixedly installed on the top assembly part 61B. In this way, the positions of the inner magnetic control mechanism 22B and the water tank 11B remain unchanged.

[0109] Preferably, the assembly frame 60B includes a bottom assembly part 62B. The water tank 11B is fixedly installed on the bottom assembly part 62B. The top assembly part 61B is fixedly installed on the bottom assembly part 62B, and the top assembly part 61B is supported by the bottom assembly part 62B above the water tank 11B. In this way, the top assembly part 61B is located above the water tank 11B, and the top assembly part 61B is configured to keep its position relative to the water tank 11B unchanged.

[0110] It is worth mentioning that the specific way of fixedly installing the inner magnetic control mechanism 22B on the top assembly part 61B is not limited in the resistance device 2000 of the present invention. For example, in this specific example of the rowing machine of the present invention, refer to the attached Figure 20 and Figure 21 The inner magnetic control mechanism 22B and the top assembly part 61B can be fixed by a set of screws so that the inner magnetic control mechanism 22B is fixedly installed on the top assembly part 61B.

[0111] Continue to refer to the attached Figure 21 The resistance device 2000 further includes a third assembly unit 70B. The third assembly unit 70B includes a third assembly body 71B and at least one third bearing 72B. The third assembly body 71B has a third assembly channel 711B. The third bearing 72B is embedded in the third assembly channel 711B of the third assembly body 71B. The outer side of the bearing of the third bearing 72B is fixedly installed on the third assembly body 71B. The inner side of the bearing of the third bearing 72B is fixedly sleeved on the linkage shaft 30B. The third assembly body 71B is fixedly installed in the assembly part through hole 611B of the top assembly part 61B. In this way, the two first bearings 42B and one third bearing 72B can prevent the linkage shaft 30B from wobbling and tilting when rotating at different positions of the linkage shaft 30B, so as to ensure that the linkage shaft 30B rotates around its own central axis.

[0112] Refer to the attachedFigure 20 , Figure 21 and Figure 22 , the water tank 11B has an assembly groove 115B, and the linkage shaft 30B suspends the magnetoresistive unit 20B in the assembly groove 115B of the water tank 11B. In this way, not only can the resistance device 2000 be miniaturized, but also from the side view perspective, the magnetoresistive unit 20B is visually invisible, which is beneficial to hiding the magnetoresistive unit 20B.

[0113] Continue to refer to the attached Figures 21 to 27 , the flywheel 21B includes a flywheel body 212B and a conductor 213B. The flywheel body 212B forms the flywheel space 211B and the flywheel through hole 210B. The conductor 213B is disposed on the flywheel body 212B and is located in the flywheel space 211B. The internal magnet control mechanism 22B includes a housing 221B, a driving unit 222B, at least one bent and extended swing arm 223B, and at least one set of magnetic elements 224B. The driving unit 222B is disposed in the housing 221B. The swing arm 223B has a swing arm pivot end 2231B and a swing arm driven end 2232B that are opposite to each other. The swing arm pivot end 2231B of the swing arm 223B is rotatably mounted on the edge of the housing 221B. The swing arm driven end 2232B of the swing arm 223B is drivably connected to the driving unit 222B. One set of the magnetic elements 224B is disposed outside the swing arm 223B, and the magnetic elements 224B provide a magnetic field environment. The internal magnet control mechanism 22B is suspended in the flywheel space 211B of the flywheel 21B with the magnetic elements 224B facing the conductor 213B, and at least a part of the conductor 213B is located in the magnetic field environment of the magnetic elements 224B. When the flywheel 21B is driven to rotate relative to the internal magnet control mechanism 22B, the conductor 213B of the flywheel 21B cuts the magnetic induction lines of the magnetic elements 224B of the internal magnet control mechanism 22B to generate eddy currents. In this way, the magnetoresistive unit 20B provides magnetic resistance.

[0114] Specifically, after the driving unit 222B drives the swing arm 223B and the magnetic element 224B to swing towards the direction close to the conductor 213B, the distance between the magnetic element 224B and the conductor 213B is reduced. At this time, the magnetoresistive unit 20B can provide a greater magnetic resistance force, that is, the user needs to use a greater force to drive the flywheel 21B to rotate. Correspondingly, after the driving unit 222B drives the swing arm 223B and the magnetic element 224B to swing towards the direction away from the conductor 213B, the distance between the magnetic element 224B and the conductor 213B is increased. At this time, the magnetoresistive unit 20B can provide a smaller magnetic resistance force, that is, the user needs to use a smaller force to drive the flywheel 21B to rotate. That is to say, by changing the distance between the magnetic element 224B and the conductor 213B, the magnetic resistance provided by the magnetoresistive unit 20B can be adjusted, that is, the resistance provided by the resistance device 2000 can be adjusted to meet the exercise needs of the user.

[0115] Further, referring to the attached Figure 20 , the flywheel body 212B includes a wheel disc 2121B and a wheel ring 2122B extending from the edge of the wheel disc 2121B in one direction. A flywheel space 211B is formed between the wheel ring 2122B and the wheel disc 2121B. The flywheel perforation 210B is formed in the middle of the wheel disc 2121B, and the conductor 213B is disposed on the inner wall of the wheel ring 2122B so that the conductor 213B is disposed on the flywheel body 212B and located in the flywheel space 211B. In a specific example of the rowing machine of the present invention, the conductor 213B may be an aluminum ring, and the outer diameter dimension of the conductor 213B is the same as the inner diameter dimension of the wheel ring 2122B of the flywheel body 212B. Based on the frictional force generated between the outer wall of the conductor 213B and the inner wall of the wheel ring 2122B, the conductor 213B can be disposed on the wheel ring 2122B and located in the flywheel space 211B.

[0116] Referring to the attached Figures 22 to 27, the housing 221B has an internal space 2211B, a peripheral opening 2212B, and at least one communication channel 2213B. The housing 221B includes a first housing 2215B and a second housing 2216B. The first housing 2215B and the second housing 2216B are installed with each other to form the internal space 2211B, the peripheral opening 2212B, and the communication channel 2213B between the first housing 2215B and the second housing 2216B. The peripheral opening 2212B surrounds the internal space 2211B, and the communication channel 2213B communicates the internal space 2211B and the peripheral opening 2212B.

[0117] It is worth mentioning that the installation method of the first housing 2215B and the second housing 2216B 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 2215B and the second housing 2216B can be installed with each other by screws.

[0118] Referring to the appendix Figures 22 to 27 , the drive unit 222B includes a drive wheel 2221B, at least one connecting element 2222B, a drive motor 2223B, and a transmission gear set 2224B. The drive wheel 2221B is rotatably installed in the internal space 2211B of the housing 221B. One end of the connecting element 2222B is connected to the drive wheel 2221B. The other end of the connecting element 2222B extends to the peripheral opening 2212B after passing through the communication channel 2213B of the housing 221B and is connected to the driven end 2232B of the swing arm 223B of the swing arm. The drive motor 2223B is arranged in the internal space 2211B of the housing 221B. Each transmission gear in the transmission gear set 2224B is rotatably installed on the housing 221B in a manner that adjacent transmission gears mesh with each other. One transmission gear in the transmission gear set 2224B is meshed with the worm 22231B of the drive motor 2223B, and the other is meshed with the drive wheel 2221B. In this way, the drive motor 2223B can output power to the drive wheel 2221B through the transmission gear set 2224B to drive the drive wheel 2221B to rotate relative to the housing 221B.

[0119] When the drive motor 2223B and the transmission gear set 2224B drive the drive wheel 2221B to rotate, so as to drive the swing arm 223B and the magnetic element 224B to swing at the peripheral opening 2212B of the housing 221B through the connecting element 2222B, the distance between the magnetic element 224B and the conductor 213B can be increased or decreased. Specifically, when the drive motor 2223B and the transmission gear set 2224B drive the drive wheel 2221B to rotate, so as to drive the swing arm 223B and the magnetic element 224B to swing in a direction close to the conductor 213B through the connecting element 2222B, the distance between the magnetic element 224B and the conductor 213B is decreased. At this time, the magnetoresistive unit 20B can provide a greater magnetic resistance, that is, the user needs to use greater force to drive the flywheel 21B to rotate. Correspondingly, when the drive motor 2223B and the transmission gear set 2224B drive the drive wheel 2221B to rotate, so as to drive the swing arm 223B and the magnetic element 224B to swing in a direction away from the conductor 213B through the connecting element 2222B, the distance between the magnetic element 224B and the conductor 213B is increased. At this time, the magnetoresistive unit 20B can provide a smaller magnetic resistance, that is, the user needs to use less force to drive the flywheel 21B to rotate. That is to say, by changing the distance between the magnetic element 224B and the conductor 213B, the magnetic resistance provided by the magnetoresistive unit 20B can be adjusted, that is, the resistance provided by the resistance device 2000 can be adjusted to meet the exercise needs of the user.

[0120] Further, referring to the attached Figure 24 , the internal magnetic control mechanism 22B further includes a circuit board 226B. The circuit board 226B is disposed in the internal space 2211B of the housing 221B, and the drive motor 2223B of the drive unit 222B is connected to the circuit board 226B. The circuit board 226B may be mounted with a logic chip, or the circuit board 226B may be provided with a logic circuit to allow the circuit board 226B to control the working state of the drive motor 2223B. For example, the circuit board 226B can control the rotation direction of the worm 22231B of the drive motor 2223B.

[0121] Further, referring to the attached Figure 25, the inner magnetic control mechanism 22B further includes a potentiometer 225B. The fixed part 2252B of the potentiometer 225B is disposed on the outer shell 221B and connected to the circuit board 226B. The rotating shaft 2251B of the potentiometer 225B is installed on the driving wheel 2221B. When the worm 22231B of the driving motor 2223B rotates to cause the transmission gear set 2224B to transmit power to the driving wheel 2221B, the driving wheel 2221B drives the rotating shaft 2251B of the potentiometer 225B to rotate synchronously while rotating, so as to change the resistance value of the potentiometer 225B. The resistance value of the potentiometer 225B, the rotating position of the driving wheel 2221B, and the swinging position of the swing arm 223B are in one-to-one correspondence. Therefore, the swinging position of the swing arm 223B can be determined by detecting the resistance value of the potentiometer 225B, and further the resistance that the resistance device 2000 can provide can be obtained.

[0122] Further, referring to the attached Figure 25 , the outer shell 221B has a housing through hole 2214B and a wire through hole 2217B. The housing through hole 2214B and the wire through hole 2217B are respectively formed in the first housing 2215B and communicate with the internal space 2211B of the outer shell 221B. The fixed part 2252B of the potentiometer 225B is fixedly installed on the first housing 2215B outside the outer shell 221B. The rotating shaft 2251B of the potentiometer 225B extends to the internal space 2211B of the outer shell 221B through the housing through hole 2214B of the outer shell 221B, and the rotating shaft 2251B is inserted into the assembly hole 22211B of the driving wheel 2221B, so that the rotating shaft 2251B is installed on the driving wheel 2221B. One end of the wire 227B of the inner magnetic control mechanism 22B is connected to the circuit board 226B, and the other end extends from the internal space 2211B of the outer shell 221B to the outside of the outer shell 221B through the wire through hole 2217B of the outer shell 221B and is connected to the fixed part 2252B of the potentiometer 225B, so that the fixed part 2252B of the potentiometer 225B is connected to the circuit board 226B. In this way, the circuit board 226B can control the working state of the driving motor 2223B according to the resistance value fed back by the potentiometer 225B.

[0123] When the drive motor 2223B and the transmission gear set 2224B drive the drive wheel 2221B to rotate, so as to drive the swing arm 223B to swing at the peripheral opening 2212B of the housing 221B through the connecting element 2222B, the drive wheel 2221B simultaneously drives the rotating shaft 2251B of the potentiometer 225B to rotate, so as to change the resistance value of the potentiometer 225B. In other words, the resistance value of the potentiometer 225B is associated with the swinging position of the swing arm 223B, and the swinging position of the swing arm 223B can be obtained by acquiring the resistance value of the potentiometer 225B, so as to determine the distance between the magnetic element 224B and the part of the flywheel 21B corresponding to the peripheral opening 2212B of the housing 221B, so as to obtain the load of the flywheel 21B when it is driven by the linkage shaft 30B to rotate.

[0124] Reference appendix Figure 25 As shown in the figure, the swing arm 223B includes a swing arm main body 2233B and at least one magnetic concentrating wall 2234B protruding from the side of the swing arm main body 2233B. The magnetic element 224B is arranged on the swing arm main body 2233B, and the magnetic concentrating wall 2234B shields at least a part of the side of the magnetic element 224B. The swing arm main body 2233B and the magnetic concentrating wall 2234B concentrate the magnetic induction lines of the magnetic element 224B in the direction towards the flywheel 21B, so as to reduce the magnetic leakage phenomenon and improve the magnetic utilization rate of the internal magnetic control mechanism 22B. At the same time, the magnetic concentrating wall 2234B extends from one end of the swing arm main body 2233B to the other end, so as to enhance the structural strength of the swing arm 223B and prevent the swing arm 223B from deforming, so as to ensure the reliability of the internal magnetic control mechanism 22B. That is to say, the magnetic concentrating wall 2234B can not only concentrate the magnetic induction lines of the magnetic element 224B in the direction towards the flywheel 21B to enhance the magnetic utilization rate of the internal magnetic control mechanism 22B, but also enhance the structural strength of the swing arm 223B to avoid the problem of affecting the reliability of the internal magnetic control mechanism 22B due to the deformation of the swing arm 223B.

[0125] Preferably, the swing arm 223B includes two of the magnetic concentrating walls 2234B, with one of the magnetic concentrating walls 2234B provided on each of the opposite sides of the swing arm body 2233B, so that a positioning groove 2235B is formed between the swing arm body 2233B and the two magnetic concentrating walls 2234B of the swing arm 223B. The magnetic element 224B provided on the swing arm body 2233B is positioned in the positioning groove 2235B of the swing arm 223B. In this way, on the one hand, the swing arm 223B can prevent the magnetic element 224B from being misaligned, and on the other hand, the two magnetic concentrating walls 2234B can respectively shield the side edges on the opposite sides of the magnetic element 224B to further improve the magnetic concentrating effect and thus improve the magnetic utilization rate of the internal magnetic control mechanism 22B.

[0126] In this specific example of the resistance device 2000 of the present invention, the magnetic concentrating wall 2234B of the swing arm 223B extends integrally outward from the side edge of the swing arm body 2233B, that is, the swing arm body 2233B and the magnetic concentrating wall 2234B of the swing arm 223B 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 curvature to obtain the swing arm 223B. The unbent part of the metal sheet forms the curved and extended swing arm body 2233B after the pressure is applied to generate a curvature, and the bent part of the metal sheet forms the curved and extended magnetic concentrating wall 2234B after the pressure is applied to generate a curvature. Thus, the swing arm body 2233B and the magnetic concentrating wall 2234B are of an integral structure.

[0127] In this specific example of the ship brushing machine of the present utility model, the internal magnetic control mechanism 22B includes two swing arms 223B and two groups of magnetic elements 224B. The swing arm pivot ends 2231B of the two swing arms 223B are respectively rotatably mounted on one side of the edge of the housing 221B in an adjacent manner, and the swing arm driven ends 2232B of the two swing arms 223B are respectively swingably arranged on the other side of the edge of the housing 221B in an adjacent manner. And each of the two swing arms 223B is provided with a group of magnetic elements 224B. Correspondingly, the drive unit 222B includes a drive wheel 2221B and two connection elements 2222B. The drive wheel 2221B is located between the swing arm driven ends 2232B of the two swing arms 223B. One end of each connection element 2222B is respectively connected to the drive wheel 2221B, and the other end is respectively connected to the swing arm driven end 2232B of each swing arm 223B. When the drive wheel 2221B rotates, the drive wheel 2221B applies force to the swing arm driven ends 2232B of the two swing arms 223B through the two connection elements 2222B, so as to be able to drive the two swing arms 223B to swing relative to the housing 221B in a symmetric manner.

[0128] In this specific example of the resistance device 2000 of the present utility model, the connection element 2222B is rigid. One end of the connection element 2222B is rotatably mounted on the swing arm driven end 2232B of the swing arm 223B, and the other end is rotatably mounted on the edge of the drive wheel 2221B. Thus, when the drive wheel 2221B rotates relative to the housing 221B, one end of the connection element 2222B generates rotation relative to the drive wheel 2221B, and the other end generates rotation relative to the swing arm 223B. In this way, the drive wheel 2221B simultaneously pulls the swing arm driven ends 2232B of the two swing arms 223B inward through the two connection elements 2222B to increase the distance between the magnetic element 224B and the flywheel 21B, or the drive wheel 2221B simultaneously pushes the swing arm driven ends 2232B of the two swing arms 223B outward through the two connection elements 2222B to decrease the distance between the magnetic element 224B and the flywheel 21B.

[0129] Appendix Figure 28 shows a variant example of the resistance device 2000. Different from the resistance device shown in Appendix Figures 18 to 27 shown, in Appendix Figure 25In this specific example of the resistance device 2000 shown, the resistance device 2000 further includes a generator 80B, the generator 80B is installed in the water tank 11B, and the rotor of the generator 80B is drivably connected to the flywheel 21B. When the user drives the linkage shaft 30B to rotate through the force-bearing part of the rowing machine main body, on the one hand, the linkage shaft 30B drives the paddle mechanism 12B to rotate in the water storage chamber 111B of the water tank 11B, so that the water contained in the water storage chamber 111B of the water tank 11B provides resistance. On the other hand, the linkage shaft 30B drives the flywheel 21B to rotate, so that the flywheel 21B cuts the magnetic induction lines of the internal magnetic control mechanism 22B to provide resistance. On the other hand, the flywheel 21B drives the rotor of the generator 80B to rotate, so that the generator 80B generates electricity.

[0130] Preferably, the resistance device 2000 further includes a transmission belt 90B. One end of the transmission belt 90B is sleeved on the flywheel 21B, and the other end is sleeved on the rotor of the generator 80B. Thus, when the flywheel 21B is driven to rotate by the linkage shaft 30B, the flywheel 21B drives the rotor of the generator 80B to rotate through the transmission belt 90B, so that the generator 80B generates electricity.

[0131] Preferably, the resistance device 2000 further includes a tension pulley 100B. The tension pulley 100B is rotatably arranged in the water tank 11B, and the outer side of the transmission belt 90B abuts against the tension pulley 100B.

[0132] 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, the embodiments of the present invention can have any deformation or modification.

Claims

1. Rowing machine, characterized in that, Comprising: A rowing machine main body, wherein the rowing machine main body includes a frame and a seat slidably arranged on the frame; A pulling device, wherein the pulling device includes a pulling belt and a handle provided at one end of the pulling belt; and A resistance device, wherein the resistance device is arranged on the frame, and the resistance device includes a water resistance unit and a magnetic resistance unit connected to the water resistance unit, and the water resistance unit is operably connected to the other end of the pulling belt.

2. The rowing machine according to claim 1, wherein the water resistance unit includes a water tank, a spring winding mechanism and a paddle mechanism, the water tank is arranged on the frame, and the water tank has a water storage cavity and a water tank perforation communicating with the top of the water storage cavity, the spring winding mechanism is rotatably arranged outside 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 one end of the pulling belt is wound around the spring winding mechanism so that the water resistance unit is operably connected to the pulling belt, wherein the magnetic resistance unit includes a flywheel and an external magnetic control mechanism arranged adjacent to the flywheel, the flywheel is rotatably installed on the frame and is drivingly connected to the driving disc of the spring winding mechanism, and a part of the flywheel is located in the magnetic field environment of the external magnetic control mechanism.

3. The rowing machine according to claim 2, wherein the external magnetic control mechanism includes a housing, a driving unit, a swing arm and a set of magnetic elements, the housing has a housing space and a housing passage communicating with the housing space, the driving unit and the swing arm are both arranged in the housing space of the housing, and one end of the swing arm is rotatably installed on the housing, and the other end is drivingly connected to the driving unit, and the swing arm is driven by the driving unit to swing at a position adjacent to the housing passage of the housing, and the magnetic elements are arranged on the swing arm, wherein the magnetic elements of the external magnetic control mechanism face the periphery of the flywheel.

4. The rowing machine according to claim 3, wherein the external magnetic control mechanism includes a circuit board, the circuit board is arranged on the housing and is not located in the housing space, and the driving unit is connected to the circuit board.

5. The rowing machine according to claim 3, wherein the driving unit includes a driving motor, a transmission gear set, a sector gear and a connecting rod, the driving motor is arranged on the housing, each transmission gear in the transmission gear set is rotatably installed on 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, the sector gear is meshed with another transmission gear in the transmission gear set, and the opposite ends of the connecting rod are respectively rotatably installed on the sector gear and the swing arm.

6. The rowing machine according to any one of claims 2 to 5, wherein the resistance device includes 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.

7. The rowing machine according to claim 1, wherein the water resistance unit includes a water tank, a spring winding mechanism and a paddle mechanism. The water tank is arranged on the frame, and 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. 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 and the paddle mechanism are linked. 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.

8. The rowing machine according to claim 7, wherein the 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 includes 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 passes through the mechanism perforation of the internal magnetic control mechanism and the flywheel perforation of the flywheel respectively, 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 drivingly connected to the 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.

9. The rowing machine according to claim 8, wherein the flywheel includes a flywheel body and a conductor. The flywheel body forms the flywheel space and the flywheel perforation. The conductor is arranged on the flywheel body and is located in the flywheel space. 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 arranged in the housing. 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 installed on the edge of the housing. The swing arm driven end of the swing arm is drivingly connected to the driving unit. The magnetic element is arranged on the outer side of the swing arm. 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.

10. The rowing machine according to claim 9, wherein the drive unit includes a drive motor, a transmission gear set, a sector gear, and a connecting rod. The drive 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 such a manner that adjacent transmission gears mesh with each other. One transmission gear in the transmission gear set meshes with the worm of the drive motor, and another transmission gear meshes with the sector gear. Opposite ends of the connecting rod are respectively rotatably mounted on the sector gear and the driven end of the swing arm of the swing arm.

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