Exercise equipment

Abstract

The invention relates to a fitness equipment with a body movement device, wherein a left movement member and a right movement member are respectively used for operating by user's hands or feet, and can independently rotate around a corresponding left-right axial axis, and can drive a flywheel to rotate through a transmission mechanism; the transmission mechanism has a left transmission mechanism and a right transmission mechanism; the left transmission mechanism is arranged between the left movement member and the flywheel, so that the left movement member can drive the flywheel to rotate in a predetermined rotation direction no matter in a positive rotation direction or in a reverse rotation direction; the right transmission mechanism is arranged between the right movement member and the flywheel, so that the right movement member can drive the flywheel to rotate in the predetermined rotation direction no matter in the positive rotation direction or in the reverse rotation direction.

Description

Technical Field

[0001] This invention relates to fitness equipment, and more particularly to a fitness device that allows users to perform limb exercises. Background Technology

[0002] U.S. Patent No. 7,841,969 discloses a fitness device (commercialized under the name "MatrixKrankcycle") comprising a frame standing on the ground and an upper limb exercise device positioned at an appropriate height on the frame. The upper limb exercise device allows the user to grip the left and right handles respectively for arm movements around a transverse axis. The user can choose to perform upper limb exercises in a sitting or standing position. For a sitting position, a dedicated seat component must be assembled into a predetermined position on the frame, with the seat portion supporting the buttocks positioned behind and below the handles, allowing the user to straddle the seat and perform upper limb exercises in a predetermined orientation. For a standing position, the seat component must be detached from the frame and placed elsewhere, allowing the user to stand behind the upper limb exercise device (i.e., in the area previously occupied by the seat) and perform upper limb exercises in the same orientation. Furthermore, after the seat component is detached, wheelchair users can also access the same area from behind the fitness equipment to perform upper limb exercises. In general, fitness equipment can be transformed into a first type that requires the use of a seating component, or a second type that does not require the use of a seating component, depending on the user's needs. However, to transform the fitness equipment from the first type to the second type, the user must disassemble and properly install the seating component. To transform the fitness equipment from the second type back to the first type, the user must retrieve and reassemble the seating component from elsewhere. This transformation process is somewhat troublesome and inconvenient in terms of handling the seating component. Moreover, the unused seating component in the second type must be placed elsewhere, usually directly next to the chassis of the frame, which occupies extra floor space and may obstruct others.

[0003] Of course, the same problem does not only occur with the above-mentioned types of fitness equipment. For example, a fitness equipment (product name "StepOne Recumbent Stepper") produced by the American company SCIFIT allows users to sit on its seat and use a limb movement device in front to perform limb movements by alternating pushing with their hands and feet. If the seat is pulled back along the track at the bottom of the frame and placed elsewhere, users in wheelchairs can enter the same area from the rear to perform limb movements. Similarly, changing whether or not the seat is in use is inconvenient.

[0004] On the other hand, in the upper limb exercise device of the fitness equipment disclosed in U.S. Patent No. 7,841,969, the left and right handles rotate independently. In other words, the relative positions of the two handles on the circular motion trajectory around the horizontal axis are not fixed. In addition, the user can only choose to make one of the two handles rotate forward or backward with resistance (while the other rotation is like spinning freely). If the user wants to change the rotation direction of the hand force, he must first release the locking relationship between the upper limb exercise device and the frame, and then flip the entire upper limb exercise device 180 degrees forward and backward before relocking it before he can start training in different rotation directions. This is not only troublesome, but also hinders the freedom and continuity of hand movement. Summary of the Invention

[0005] To address the aforementioned problems, the main objective of this invention is to provide a fitness device that allows users to perform limb exercises, enabling them to have more diverse choices in the movement of their hands or feet, and providing a high degree of freedom and continuity during exercise.

[0006] To achieve the above objectives, the present invention provides a fitness equipment comprising: a frame; and a limb movement device disposed on the frame, having a left-side movement component, a right-side movement component, a flywheel, and a transmission mechanism. The left-side and right-side movement components are respectively operated by the user's hands or feet, and can each independently rotate around an axis corresponding to the left-right axis. Furthermore, during rotation, the flywheel is driven to rotate via the transmission mechanism. The transmission mechanism is characterized by having a left-side transmission mechanism and a right-side transmission mechanism. The left-side transmission mechanism is disposed between the left-side movement component and the flywheel, enabling the left-side movement component to drive the flywheel to rotate in a predetermined direction regardless of whether it rotates in a clockwise or counterclockwise direction. The right-side transmission mechanism is disposed between the right-side movement component and the flywheel, enabling the right-side movement component to drive the flywheel to rotate in the predetermined direction regardless of whether it rotates in the clockwise or counterclockwise direction.

[0007] In the above-described technical solution of the present invention, the right-side transmission mechanism has a first sprocket and a second sprocket. When the right-side moving member rotates, it drives the first sprocket and the second sprocket to rotate in opposite directions. The left-side transmission mechanism has a third sprocket and a fourth sprocket. When the left-side moving member rotates, it drives the third sprocket and the fourth sprocket to rotate in opposite directions. The transmission mechanism also has a pulley. The axes of the first sprocket, the second sprocket, the third sprocket, the fourth sprocket, and the pulley all correspond to the left and right axes. Each sprocket and the pulley are unidirectionally driven. Any sprocket rotating in the forward direction can drive the pulley to rotate in the forward direction, and any sprocket rotating in the reverse direction will not drive or affect the rotation of the pulley. When the pulley rotates in the forward direction, it drives the flywheel to rotate in the predetermined direction.

[0008] The right-side transmission mechanism has a chain disc and a transmission chain. The chain disc rotates with the right-side moving member. The transmission chain simultaneously wraps around the first chain disc and the first sprocket. The second sprocket meshes with the outer edge of the transmission chain. The left-side transmission mechanism has another chain disc and another transmission chain. The other chain disc rotates with the left-side moving member. The other transmission chain simultaneously wraps around the other chain disc and the third sprocket. The fourth sprocket meshes with the outer edge of the other transmission chain.

[0009] The first sprocket is coaxially connected to the pulley, and the first sprocket is a clutch sprocket. When the first sprocket rotates in the forward direction, it can push the pulley to rotate in the same direction. When the first sprocket rotates in the reverse direction, it will disengage from the pulley. The third sprocket is coaxially connected to the pulley, and the third sprocket is a clutch sprocket. When the third sprocket rotates in the forward direction, it can... Push in the direction of rotation The pulleys rotate in the same direction, and when the third sprocket rotates in the opposite direction, it will interact with the pulleys. The pulley disengages from the jamming state.

[0010] The transmission mechanism further includes a first transmission sprocket, a second transmission sprocket, and a transmission chain that simultaneously wraps around the first transmission sprocket and the second transmission sprocket; the second sprocket is coaxially connected to the first transmission sprocket, and the second sprocket is a clutch sprocket. When the second sprocket rotates in the forward direction, it can push the first transmission sprocket to rotate in the same direction. When the second sprocket rotates in the reverse direction, it will disengage from the first transmission sprocket. The fourth sprocket is coaxially connected to the first transmission sprocket, and the fourth sprocket is a clutch sprocket. When the fourth sprocket rotates in the forward direction, it can push the first transmission sprocket to rotate in the same direction. When the fourth sprocket rotates in the reverse direction, it will disengage from the first transmission sprocket. The second transmission sprocket is coaxially connected to the pulley, and when the second transmission sprocket rotates in the forward direction, it can drive the pulley to rotate in the same direction.

[0011] The user can choose to make the left moving part and the right moving part rotate synchronously or rotate independently.

[0012] The limb movement device has a left crankshaft, a right crankshaft, a left crank arm, and a right crank arm. The left crankshaft and the right crankshaft are coaxially opposite each other, and each crankshaft has an inner groove. The left crank arm and the right crank arm are respectively fixed to the outer ends of the left crankshaft and the right crankshaft. The left-side moving part and the right-side moving part are respectively connected to the left crank arm and the right crank arm. A central shaft coaxially passes through the left crankshaft and the right crankshaft, and can be used by the user. The operation involves axial displacement; a block is fixed on the central shaft, and the block can move between an engaged position and a disengaged position as the central shaft moves axially. When the block is in the disengaged position, the block is completely accommodated in one of the slots, allowing the left crankshaft and the right crankshaft to rotate independently. When the block is in the engaged position, the left and right sides of the block are respectively engaged in the two slots, allowing the left crankshaft and the right crankshaft to rotate synchronously.

[0013] Depending on the user's choice, when the insert is in the engaged position, the left crank arm and the right crank arm may be in the same position or in opposite positions that are 180 degrees apart.

[0014] Each of the slots is provided with a magnet, which can attract the insert located in the slot.

[0015] The two opposite ends of the central shaft extend out of the left crankshaft and the right crankshaft respectively, and are provided with a ball-shaped handle.

[0016] By adopting the above technical solution, the fitness equipment of the present invention can switch between a first mode using the seat component and a second mode not using the seat component, depending on the user's limb movement method. This is achieved simply by flipping the seat component between the used and idle positions, which is relatively simple and quick. Regardless, when the seat component of the present invention is not in use, it does not need to be removed or placed outside the fitness equipment, resulting in better overall space utilization. Furthermore, it allows users more diverse choices in the movement of their hands or feet, and provides a high degree of freedom and continuity during exercise. Attached Figure Description

[0017] Figure 1 This is a left rear perspective view of a preferred embodiment of the present invention in the first configuration.

[0018] Figure 2 This corresponds to a preferred embodiment of the present invention. Figure 1 Left view of the state;

[0019] Figure 3 This corresponds to a preferred embodiment of the present invention. Figure 1 Rear view of the status;

[0020] Figure 4 This is a left rear perspective view of a preferred embodiment of the limb movement device and position adjustment device of the present invention;

[0021] Figure 5 This is a three-dimensional view of the right rear of the limb movement device;

[0022] Figure 6 This is a left view of the limb movement device;

[0023] Figure 7 This is a right view of the limb movement device;

[0024] Figure 8 This is a bottom view of the limb movement device;

[0025] Figure 9 It is along Figure 6 A sectional view along the IX-IX section, in which the left and right crank arms are in the same orientation;

[0026] Figure 9A and Figure 9B All Figure 9 The enlarged view of the same part shows the clutch mechanism in both disengaged and engaged states.

[0027] Figure 10 similar Figure 9 However, the left and right crank arms are located in opposite positions, 180 degrees apart;

[0028] Figure 10A yes Figure 10 The enlarged view shows the clutch mechanism in an engaged state;

[0029] Figure 11 This corresponds to a preferred embodiment of the present invention. Figure 1 A three-dimensional view from the left front of the state, in which all the plastic casings at the bottom of the frame have been removed to reveal the pivot structure at the bottom of the chair arm;

[0030] Figure 12 This corresponds to a preferred embodiment of the present invention. Figure 1 Bottom view of the status;

[0031] Figure 13 This corresponds to a preferred embodiment of the present invention. Figure 1 A top view of the lower half of the equipment (excluding the plastic casing at the bottom of the frame), with imaginary lines outlining the relative positions of the limb movement devices.

[0032] Figure 14 It is along Figure 13 A sectional view along the XIV-XIV section line;

[0033] Figure 15 This is a left rear perspective view of a preferred embodiment of the present invention in the second configuration;

[0034] Figure 16 This corresponds to a preferred embodiment of the present invention. Figure 15 Left view of the state;

[0035] Figure 17 This corresponds to a preferred embodiment of the present invention. Figure 15 Rear view of the status;

[0036] Figure 18 This corresponds to a preferred embodiment of the present invention. Figure 15 A top view of the lower half of the equipment (excluding the plastic casing at the bottom of the frame), with imaginary lines outlining the relative positions of the limb movement devices.

[0037] Figure 19 This is a left view of a preferred embodiment of the present invention for use by a wheelchair user. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention are within the scope of protection of the present invention.

[0039] Please see Figures 1 to 3As shown, a preferred embodiment of the fitness equipment of the present invention includes a frame 10 standing on the ground, and a limb movement device 40 is provided at an appropriate height on the frame 10 for users to perform upper limb exercises. As will be described in detail later, users can choose to perform upper limb exercises in a predetermined sitting or standing posture, and there is no... Whether to adopt a sitting or standing posture The posture, the user's position, and the direction they are facing are all the same. The user enters in a predetermined manner. The direction the user faces and the direction they turn away from when performing upper limb exercises correspond to the front and back of the fitness equipment, respectively. In other words, the forward / backward, left / right, and up / down directions of the user's body during upper limb exercises define the forward / backward axis (Z), left / right axis (X), and up / down axis (Y) of the fitness equipment, respectively. The fitness equipment is generally symmetrical in appearance.

[0040] The frame 10 includes a base 20 fixed to the ground and an upright 30 extending upward from the base. The base 20 mainly has a base 21 shaped like a rectangular plate and a ramp 25 fixed to the front end of the base. Figures 1 to 3 The chassis 21 and ramp 25 shown are the exterior components covering the plastic watch case (unnumbered). After removing the plastic watch case, as shown... Figure 11 As shown, the main body of the chassis 21 is a chassis frame 21' welded from metal components, and the main body of the inclined platform 25 is an inclined platform frame 25' welded from metal components. The upright part 30 mainly has two symmetrical side rods 31, the bottom end of each side rod 31 is fixed to the corresponding side of the front end of the bottom 20 (the chassis frame 21'), and the rods extend upwards while gradually tilting towards the center of the width of the fitness equipment, such as... Figure 3 As shown.

[0041] The limb movement device 40 is located on the upright part 30 of the frame 10, specifically between the top ends of the two side rods 31. The actual structure after removing the outer casing 41 is as follows: Figure 4 As shown, simply put, the limb movement device 40 mainly has a left handle 42L and a right handle 42R for the user's left and right hands to grip respectively. The two handles 42L and 42R can move around a first axis A1 corresponding to the left and right axes along a circular trajectory (e.g. Figure 2 When T1 rotates, the operation handles 42L and 42R rotate, which in turn drives a flywheel 44 to rotate in place via several chains and sprockets (forming a transmission mechanism 43, detailed later). An eddy current brake 45 is provided near the circumference of the flywheel 44. The user can adjust the resistance applied to the flywheel 44 by the eddy current brake 45 using a resistance adjustment paddle 46 located between the left handle 42L and the right handle 42R. Thus, the user can reach forward from behind the limb movement device 40 to grasp the handles 42L and 42R, and then apply force to make the handles 42L and 42R (each forming a moving part) rotate around the first axis A1 to perform upper limb movement by rotating the hand along a circular movement trajectory.

[0042] Various prior art limb movement devices, including those allowing hands or feet to move cyclically along closed trajectories such as circles or ellipses, to reciprocate along straight or curved trajectories, or to move freely without a predetermined trajectory (e.g., pulling a rope connected to a weight), can all be appropriately applied in this invention. Furthermore, the limb movements (including upper and lower limb movements) in this invention are not limited to active exercise where the user's hands or feet exert force to operate a moving component (e.g., a handle or pedal). In other words, it could also be passive exercise where a moving component is driven by a motor or other power source, thereby inducing movement in the user's hands or feet. Additionally, in other possible embodiments of this invention (not shown), the limb movement device may have only a single moving component.

[0043] In this preferred embodiment, the limb movement device 40 is positioned adjustablely on the upright portion 30 of the frame 10. Its position relative to the frame 10 can be adjusted via a position adjustment device 50, essentially adjusting the height of the circular movement trajectory of the handles 42L and 42R from the bottom 20 of the frame, thus adapting to various usage needs. Specifically, as... Figure 4 As shown, a horizontal shaft 32 overlaps and is locked between the top ends of the two side rods 31. The middle section of the horizontal shaft 32 is cylindrical. Its axis (hereinafter referred to as the second axis) A2 corresponds to the left and right axial directions; a rearward-extending support 33 is welded onto the transverse axis 32; The handles 42L and 42R, transmission mechanism 43, flywheel 44, and eddy current brake 45 of the limb movement device 40 are all movably mounted on a swing frame 47. The top front end of the swing frame 47 is pivotally connected to the middle section of the horizontal axis 32 via two bearings 48, allowing the entire limb movement device 40 to swing around the second axis A2. The position adjustment device 50 mainly has a linearly retractable gas lift. The pneumatic cylinder 51 has one end (rear end) pivotally connected to the top rear end of the swing frame 47, and the other end (front end) pivotally connected to the rear end of the support seat 33. Therefore, the extension and retraction of the pneumatic cylinder 51 and the swinging motion of the limb movement device 40 necessarily occur simultaneously. In other words, the length of the pneumatic cylinder 51 determines the position of the limb movement device 40 relative to the frame 10. When the user pulls the lever 53 located between the left handle 42L and the right handle 42R, a steel cable 54 will pull the air valve control element 52 at the front end of the pneumatic cylinder 51, putting the pneumatic cylinder 51 in a variable length state. At this time, if the user moves the limb movement device 40 accordingly... Figure 2 , Figure 16 The counter-clockwise swinging motion raises the rear end of the limb movement device 40, causing the pneumatic rod 51 to extend accordingly. When the pneumatic rod 51 reaches its maximum extension, the limb movement device 40 stops at a position similar to... Figure 16As shown, the circular motion trajectory T1' of the second-hand handles 42L and 42R is at its highest position; conversely, when the pneumatic rod 51 is in a variable length state, if the user applies force to make the limb movement device 40... Figure 2 , Figure 16 The clockwise swinging motion lowers the rear end of the limb movement device 40, causing the pneumatic rod 51 to shorten accordingly. When the pneumatic rod 51 is at its shortest length, the limb movement device 40 stops at a position similar to... Figure 2 At the position shown, the circular motion trajectory T1 of the second-hand handles 42L and 42R is at its lowest position; when the user releases the lever 53, the air valve control component 52 resets, fixing the air pressure rod 51 at its current length, which in turn fixes the limb movement device 40 in its current position and prevents it from swinging.

[0044] Through the position adjustment function of the limb movement device 40, the user can adjust the limb movement device 40 to the most suitable position according to the posture (sitting or standing) adopted when performing upper limb exercises, and in accordance with their personal body shape and habits. This means adjusting the circular movement trajectory of the handles 42L and 42R (equal to the movement trajectory of the hand) to the most suitable height. Figure 2 and Figure 16 As shown, because the limb movement device 40 is pivotally connected to the upright part 30 of the frame 10 based on the second axis A2, when the limb movement device 40 moves relative to the frame 10, the center of the circular movement trajectory of the handles 42L and 42R (i.e., the first axis A1) will move up and down along an arc-shaped adjustment trajectory T2 with the second axis A2 as the center. Since the length of the pneumatic rod 51 can be infinitely adjusted, the user can position the center of the circular movement trajectory at any position on the arc-shaped adjustment trajectory T2.

[0045] Ideally, the height of the handles 42L and 42R, designed for a user performing upper limb exercises in a standing position, should be higher than the height of the handles 42L and 42R, designed for the same user performing upper limb exercises in a seated position. For the sake of convenience in the specifications, the following will... Figure 2 The location of the limb movement device 40 shown is called the "sitting posture applicable position". Figure 16 The location of the limb movement device 40 shown is called the "standing posture applicable position". Of course, Figure 2 and Figure 16 The positions shown are merely extreme representations or possibilities of sitting and standing postures, and are not restrictions or suggestions.

[0046] Next, the detailed structure and movement mechanism of the limb movement device 40 will be described. Please refer to [link / reference needed]. Figure 4 and Figure 5 As shown, the transmission mechanism 43 can be divided into a left transmission mechanism 43a and a right transmission mechanism 43b. Side drive Mechanism 43b is connected to and can move to drive flywheel 44, wherein the left transmission mechanism 43aLocated between the left handlebar 42L and the flywheel 44, the rotation of the left handlebar 42L drives the flywheel 44 to rotate. Similarly, the right transmission mechanism 43b is located between the right handlebar 42R and the flywheel 44, and the rotation of the right handlebar 42R drives the flywheel 44 to rotate. In this way, the user can operate the left handlebar 42L and / or the right handlebar 42R to rotate for upper limb movement.

[0047] In this preferred embodiment, the left transmission mechanism 43a and the right transmission mechanism 43b are interconnected. Figure 5 and Figure 7 As shown, the right-side transmission mechanism 43b has a first chain disc 431, a first sprocket 432, a second sprocket 433, and a first transmission chain 434. The first chain disc 431 is pivotally mounted on the right side of the swing frame 47 along a first axis A1 and is connected to the right-side handle 42R, so that rotating the right-side handle 42R will drive the first chain disc 431 to rotate. The transmission mechanism 43b also has a pulley 49 and a transmission belt 491. The pulley 49 is pivotally mounted on the right side of the swing frame 47 along a third axis A3, and the transmission belt 491 simultaneously wraps around the central axis of the pulley 49 and the flywheel 44, so that rotating the pulley 49 can drive rotating the flywheel 44. The first sprocket 432 is coaxially connected to the pulley 49, and the first transmission chain 434 simultaneously wraps around the first chain disc 431 and the first sprocket 432. Therefore, when the user turns the right handlebar 42R, the rotating first chain disc 431 drives the first sprocket 432 to rotate via the first transmission chain 434. The pulley 49, which rotates with the first sprocket 432, then drives the flywheel 44 to rotate via the transmission belt 491, allowing the user to perform upper limb exercises. The second sprocket 433 is pivotally mounted on the swing frame 47 along a fourth axis A4. It is located between the first chain disc 431 and the first sprocket 432 and engages with the outer edge of the first transmission chain 434, so that the rotation of the first transmission chain 434 also drives the second sprocket 433 to rotate.

[0048] Please see Figure 7 When the first drive chain 434 rotates, it drives the first sprocket 432 and the second sprocket 433 to rotate in opposite directions. For example, when the first sprocket 432 rotates in a forward direction (corresponding to...), Figure 7 When the second sprocket 433 rotates clockwise, it will rotate counterclockwise (corresponding to the clockwise direction). Figure 7The first sprocket 432 is a clutch sprocket, which forms a one-way clutch with the pulley 49. Specifically, when the right handlebar 42R is operated to rotate in the forward direction (hereinafter referred to as forward rotation), the first sprocket 432, which is driven to rotate in the forward direction, can push the pulley 49 to rotate in the same direction (provided that the forward rotation speed of the pulley 49 is not higher than the forward rotation speed of the first sprocket 432, the same below), thereby driving the flywheel 44 to rotate in the forward direction. Conversely, when the right handlebar 42R is operated to rotate in the reverse direction (hereinafter referred to as reverse rotation), the first sprocket 432, which is driven to rotate in the reverse direction, will disengage from the pulley 49. That is to say, the first sprocket 432 rotating in the reverse direction will not drive or affect the rotation of the pulley 49.

[0049] When the right handlebar 42R is reversed, the first sprocket 432 will also reverse, while conversely, the second sprocket 433 will rotate clockwise. Please refer to [link / reference]. Figure 4 , Figure 6 And refer to Figure 8 The left transmission mechanism 43a has a first transmission sprocket 492 coaxially connected to the second sprocket 433 of the right transmission mechanism 43b, a second transmission sprocket 493 coaxially connected to the pulley 49, and a second transmission chain 494 that simultaneously wraps around the first transmission sprocket 492 and the second transmission sprocket 493, such that when the first transmission sprocket 492 rotates, it will pass through the second transmission chain 494. This drives the second transmission sprocket 493 to rotate, thereby driving... Pulley 49 and flywheel 44 rotate. More specifically, on the right side... The second sprocket 433 of the transmission mechanism 43b is also a clutch sprocket. When the right handle 42R is operated to reverse, the second sprocket 433, which is driven to rotate forward, can push the first transmission sprocket 492 to rotate forward together with it in the direction of rotation. Then, through the second transmission chain 494, the second transmission sprocket 493 and the pulley 49 rotate forward, thereby driving the flywheel 44 to rotate forward. Conversely, when the right handle 42R is operated to rotate forward, the second sprocket 433, which is driven to rotate backward, will disengage from the first transmission sprocket 492. In other words, the second sprocket 433 rotating backward will not drive or affect the rotation of the flywheel 44.

[0050] With the above structure, when the right handlebar 42R is operated to rotate clockwise, the flywheel 44 will be driven to rotate by the first sprocket 432; conversely, when the right handlebar 42R is operated to rotate counterclockwise, the flywheel 44 will be driven to rotate by the second sprocket 433. It is worth noting that regardless of whether the right handlebar 42R is operated to rotate clockwise (corresponding to...), Figure 7 (rotate clockwise) or reverse (corresponding to) Figure 7(When rotating counterclockwise), pulley 49 and flywheel 44 are always driven to rotate clockwise. Therefore, when the user operates the right handle 42R, they can smoothly switch between clockwise and counterclockwise rotations.

[0051] like Figure 4 and Figure 6 As shown, the left transmission mechanism 43a also includes a second chain disc 435, a third sprocket 436, a fourth sprocket 437, and a third transmission chain 438. The second chain disc 435 is positioned opposite the first chain disc 431, meaning it is pivotally mounted on the left side of the swing frame 47 along the first axis A1 and connected to the left handle 42L, so that rotating the left handle 42L will drive the second chain disc 435 to rotate. The third sprocket 436 is coaxially connected to the pulley 49 and rests against the outside of the second transmission sprocket 493 (e.g., ...). Figure 4 Matching Figure 8 (As shown); the third drive chain 438 simultaneously wraps around the second chain disc 435 and the third sprocket 436. Therefore, when the user turns the left handlebar 42L, the rotating second chain disc 435 drives the third sprocket 436 to rotate via the third drive chain 438. Furthermore, the pulley 49, which rotates with the third sprocket 436, drives the flywheel 44 to rotate via the drive belt 491, allowing the user to perform upper limb movements. (As shown) Figure 6 As shown, the fourth sprocket 437 is pivotally mounted on the swing frame 47 along the fourth axis A4. It is positioned between the second chain disc 435 and the third sprocket 436 and engages with the outer edge of the third drive chain 438, so that rotation of the third drive chain 438 also drives the fourth sprocket 437 to rotate. Furthermore, the fourth sprocket 437 is coaxially connected to the first drive sprocket 492 and rests against the outer side of the first drive sprocket 492 (e.g., ...). Figure 4 Matching Figure 8 (As shown).

[0052] Please see Figure 6 When the third drive chain 438 rotates, it drives the third sprocket 436 and the fourth sprocket 437 to rotate in opposite directions. For example, when the third sprocket 436 rotates clockwise (corresponding to...), the third sprocket 436 rotates clockwise (corresponding to...). Figure 6 When the fourth sprocket 437 rotates counterclockwise (corresponding to the counterclockwise rotation), it will rotate in the opposite direction (corresponding to the counterclockwise rotation). Figure 6 (rotating clockwise). More specifically, the third sprocket 436 and the fourth sprocket 437 are also clutch sprockets. When the left handlebar 42L is operated to rotate forward, the third sprocket 436, which is driven to rotate forward accordingly, can push the pulley 49 to rotate forward as well, thereby driving the flywheel 44 to rotate forward. Conversely, when the left handlebar 42L is operated to rotate in reverse, the third sprocket 436, which is driven to rotate in reverse, will disengage from the pulley 49. In other words, the rotating third sprocket 436 will not drive or affect the rotation of the pulley 49.

[0053] When the left handlebar 42L is reversed, the third sprocket 436 will also reverse, and vice versa. fourth Sprocket 437 will rotate clockwise. Please refer to [link / reference]. Figure 4 and Figure 6 When the left handlebar 42L is reversed, Driven by the first drive sprocket 437, which rotates forward, it can push the first drive sprocket 492 to rotate forward together with it. Then, through the second drive chain 494, it drives the second drive sprocket 493 and the pulley 49 to rotate forward, thereby driving the flywheel 44 to rotate forward. Conversely, when the left handle 42L is operated to rotate forward, the fourth drive sprocket 437, which rotates in reverse, will disengage from the first drive sprocket 492. In other words, the fourth drive sprocket 437 rotating in reverse will not drive or affect the rotation of the flywheel 44.

[0054] With the above structure, when the left handlebar 42L is operated to rotate clockwise, the flywheel 44 will be driven to rotate by the third sprocket 436; conversely, when the left handlebar 42L is operated to rotate counterclockwise, the flywheel 44 will be driven to rotate by the fourth sprocket 437. It is worth noting that regardless of whether the left handlebar 42L is operated to rotate clockwise (corresponding to...), Figure 6 (rotate counterclockwise) or reverse (corresponding to) Figure 6 (When rotating clockwise), pulley 49 and flywheel 44 are always driven to rotate in the forward direction. Therefore, when operating the left handle 42L, the user can smoothly switch between forward and reverse rotation at will.

[0055] In this preferred embodiment, the flywheel 44 is configured to provide resistance to allow the user to perform upper limb exercises. Since the flywheel 44 is always driven to rotate in the forward direction, the user can operate the left handlebar 42L and the right handlebar 42R to rotate forward or backward, and can change the direction of rotation freely and smoothly.

[0056] Figure 9 It is along Figure 6 The sectional view along line IX-IX shows in detail a crank mechanism 42 of the limb movement device 40. As shown, the crank mechanism 42 includes a crankshaft assembly 421 and a left crank arm 422a and a right crank arm 422b respectively connected to opposite ends of the crankshaft assembly 421. The crankshaft assembly 421 is pivotally mounted on the swing frame 47 along a first axis A1 via multiple bearings 423. The left handle 42L is connected to the end of the left crank arm 422a away from the crankshaft assembly 421, and the right handle 42R is connected to the end of the right crank arm 422b away from the crankshaft assembly 421. The user can operate the left handle 42L and the right handle 42R to rotate the left crank arm 422a and the right crank arm 422b, causing the crankshaft assembly 421 to rotate accordingly.

[0057] The crankshaft assembly 421 has a left crankshaft 424a, a right crankshaft 424b, and a central shaft 425 passing through the center of both the left and right crankshafts 424a and 424b. The inner end of the left crankshaft 424a is pivotally mounted to the swing frame 47 via a bearing 423, and the outer end is fixedly connected to the left crank arm 422a. A second chain spool 435 is coaxially fixedly connected to the left crankshaft 424a, so that the rotation of the left crankshaft 424a will cause the second chain spool 435 to rotate together. Symmetrically, the inner end of the right crankshaft 424b is pivotally mounted to the swing frame 47 via a bearing 423, and the outer end is fixedly connected to the right crank arm 422b. A first chain spool 431 is coaxially fixedly connected to the right crankshaft 424b, so that the rotation of the right crankshaft 424b will cause the first chain spool 431 to rotate together.

[0058] In this preferred embodiment, the relative positions of the left handlebar 42L and the right handlebar 42R can be adjusted to configure them to be in opposite or the same orientation. For example, Figure 9 The left handlebar 42L and right handlebar 42R are configured in the same orientation; in other words, the left crank arm 422a and right crank arm 422b extend radially in the same direction from a common axis, and their angular positions are the same. In contrast, Figure 10 The left handlebar 42L and the right handlebar 42R are configured in opposite orientations; in other words, the left crank arm 422a and the right crank arm 422 are radially opposite each other from a common axis. Extending in opposite directions, their angular positions are... The difference is 180 degrees.

[0059] like Figure 9 Matching Figure 9A and Figure 9B As shown, the left crankshaft 424a and the right crankshaft 424b can be engaged or disengaged through a clutch mechanism, allowing the left handlebar 42L and the right handlebar 42R to rotate synchronously or independently. Furthermore, the relative positions of the left crank arm 422a and the right crank arm 422b can be adjusted. Figure 9A and Figure 9B As shown, the clutch mechanism is located between the left crankshaft 424a and the right crankshaft 424b of the crankshaft assembly 421, and has a block 426, a first groove 427, and a second groove 428. The first groove 427 is located at the inner end of the left crankshaft 424a opposite to the left crank arm 422a, and the second groove 428 is located at the inner end of the right crank arm 424b opposite to the right crank arm 422b. The shape and size of the block 426, the first groove 427, and the second groove 428 are matched so that the block 426 can be completely fitted into the first groove 427 (e.g., ...). Figure 9A (as shown), or the right half can be embedded into the second slot 428 (as shown). Figure 9B As shown, the left half is still embedded in the first groove 427 at this time.

[0060] The central shaft 425 can be axially displaced at the center of the left crankshaft 424a and the right crankshaft 424b. The insert 426 is fixed to the middle portion of the central shaft 425, such that the axially displaced central shaft 425 will cause the insert 426 to axially displace between the first groove 427 and the second groove 428. Neither the first groove 427 nor the second groove 428 are circular holes; for example, they may be rectangular or polygonal holes. Correspondingly, the cross-section of the insert 426 is not circular, but rather matches the cross-sectional shape of the grooves 427 and 428, such as rectangular or polygonal. The insert 426 can be moved between an engaged position and a disengaged position by the central shaft 425. When the insert 426 is in the disengaged position, such as... Figure 9A As shown, the insert 426 is completely accommodated within the first slot 427, so that the left crankshaft 424a and the right crankshaft 424b are not connected. Therefore, the left crankshaft 424a and the right crankshaft 424b can rotate independently, that is, the left handlebar 42L and the right handlebar 42R can rotate independently. When the insert 426 is in the engaged position, as... Figure 9B As shown, the left half of the insert 426 is engaged in the first groove 427, and the right half is engaged in the second groove 428. Therefore, the left crankshaft 424a and the right crankshaft 424b will rotate synchronously. In other words, the left handlebar 42L and the right handlebar 42R will rotate synchronously. Through the above method, the left crank arm 422a and the right crank arm 422b can be locked in a predetermined relative position (e.g., 0 degrees or 180 degrees apart) by the clutch mechanism for synchronous rotation.

[0061] Please see Figure 9 and Figure 10 The central shaft 425 can be operated to move axially, thereby moving the insert 426 between an engaged position and a disengaged position. A ball-shaped handle can be provided at each of the two opposite ends of the central shaft 425 so that the user can push or pull the central shaft 425 to adjust the relative positions of the left crank arm 422a and the right crank arm 422b, for example... Figure 9 Matching Figure 9B As shown, the left crank arm 422a and the right crank arm 422b are configured in the same orientation, or, as... Figure 10 Matching Figure 10A As shown, the left crank arm 422a and the right crank arm 422b are configured in opposite orientations. Furthermore, a magnet 429 is provided inside the first groove 427 of the left crankshaft 424a and the second groove 428 of the right crankshaft 424b, respectively. The magnet 429 can appropriately attract the insert 426 to the disengaged position (e.g., ...). Figure 9A (as shown) or engagement position (e.g.) Figure 9B , Figure 10A (As shown), to prevent accidental displacement of the insert 426 and the central shaft 425, and also by sensing the relative orientation of the left and right crank arms 422a and 422b, such as Figure 9B and Figure 10A The differences are shown.

[0062] Please refer to the following: Figures 1 to 3 A movable chair 60 is provided at the bottom 20 of the frame 10, and the movable chair 60 has a chair rod. 61 and A chair seat 69 and a chair post 61 are made of metal tubing, having a relatively low first end 62 and a relatively high... The second end 63 of the shaft includes an inclined section 65 adjacent to the first end 62, a straight section 67 adjacent to the second end 63, and a curved section 66 between the inclined section 65 and the straight section 67. Please refer to the accompanying documentation. Figures 11 to 13 A shaft sleeve 64 is welded to the first end 62 of the chair arm 61, and is pivotally connected to the bottom 20 of the frame 10 according to the central axis of the shaft sleeve 64 (hereinafter referred to as the pivot axis) A5. Specifically, it is pivotally connected to the center of the width of the chassis frame 21', and adjacent to the rear edge of the inclined platform 25. The pivot axis A5 is not parallel to the front-rear axis Z, left-right axis X, and up-down axis Y of the fitness equipment. In this preferred embodiment, the pivot axis A5 is located on a horizontal plane (i.e., the XZ plane), which is a horizontal line extending from the left rear to the right front. The acute angle θ between the pivot axis A5 and the left-right axis X of the fitness equipment is 30 degrees (see reference). Figure 12 Depending on the implementation, the acute angle θ may be between 15 and 75 degrees. Furthermore, in other possible embodiments of the invention (not shown), the pivot axis A5 is not horizontal; for example, the right end of the axis is higher than the left end, or vice versa. The seat 69 is fixed to the second end 63 of the chair post 61 and is used to support the buttocks of a user who is performing upper limb exercises in a seated position.

[0063] The movable chair 60 can rotate to a limited extent relative to the frame 10 around the pivot axis A5. Specifically, it can be rotated as follows: Figure 1 , Figure 2 , Figure 3 , Figure 13 The usage location shown is similar to... Figure 15 , Figure 16 , Figure 17 , Figure 18 The chair rotates between the idle positions shown. When the chair 60 is in the use position, the seat 69 is located above and behind the first end 62 of the chair post 61 when viewed from the side (see...). Figure 2 Furthermore, the seat 69, viewed from above, is located behind the left handlebar 42L and right handlebar 42R of the limb movement device 40 (see [reference]). Figure 13 When the chair 60 is in the idle position, the seat 69 is located above and in front of the first end 62 of the chair post 61 when viewed from the side (see...). Figure 16 Furthermore, the seat 69, viewed from above, is located to the left of the limb movement device 40 (see [reference]). Figure 18Because the pivot axis A5 in this embodiment extends from the left rear to the right front, the movable chair 60 flips from the use position to the left front to the idle position, and after flipping, the seat 69 is located on the left side of the limb movement device 40; of course, the present invention may also be implemented such that the pivot axis A5 extends from the right rear to the left front, so that the movable chair 60 flips from the use position to the right front to the idle position, and after flipping, the seat 69 is located on the right side of the limb movement device 40.

[0064] A boss 22 is provided in the center of the width of the base 21 of the frame 10. Similarly, its main body is a boss frame 22' assembled and welded from metal components (see...). Figure 11 A first rubber block 23 is locked to the front end of the convex frame 22', and the first rubber block 23 is located above and behind the first end 62 of the chair post 61. When the chair 60 is in the use position, the inclined section 65 of the chair post 61 extends backward and upward from the first end 62, and the rear side of the lower half of the inclined section 65 (with a reinforcing plate 68) abuts against the first rubber block 23. At the same time, the straight section 67 of the chair post 61 extends horizontally from front to back, like a cantilever beam supporting the seat 69 above and behind the first rubber block 23. The first rubber block 23 forms a top abutment that can stop the chair 60 in the use position, preventing it from flipping backward. When the user sits on the seat 69 and applies a backward flipping torque to the chair 60, most of the force can be borne by the first rubber block 23, reducing the load on the pivot structure of the first end 62 of the chair post 61.

[0065] The ramp 25 at the front end of the chassis 21 has an inclined surface 26 extending from rear to front and upward simultaneously, on the inclined surface 26 have A shallow ditch 27 extends roughly from the center of the width of the slope's rear edge to the upper left and front, ditch 27 A second rubber block 28 is locked at the rear end (bottom end) of the chair 60, forming a resting part. When the chair 60 is in the idle position, the inclined section 65 of the chair arm 61 extends from the first end 62 to the upper left front, and its front side abuts against the shallow groove 27 (especially the part near the first end 62 abuts against the second rubber block 28), making the chair unable to flip forward. In this preferred embodiment, the flipping angle of the chair 60 between the use position and the idle position is less than 90 degrees.

[0066] Because when the chair 60 is in the use position, its center of gravity (and the seat 69 for supporting the user's weight) is located above and behind the first end 62, which serves as the fulcrum, it will not flip forward unless subjected to a specific and sufficient external force. Similarly, because when the chair 60 is in the idle position, its center of gravity is located above and in front of the first end 62, it will not flip backward unless subjected to a specific and sufficient external force.

[0067] Even so, to further enhance safety and stability, in this preferred embodiment, a locking mechanism 70 is provided between the movable chair 60 and the bottom 20 of the frame 10 (see...). Figure 14 The locking mechanism 70 can switch between a locked state and an unlocked state according to user operation. In the locked state, the locking mechanism 70 prevents the movable chair 60 in the used position from flipping towards the idle position, and also prevents the movable chair 60 in the idle position from flipping towards the used position. Specifically, the locking mechanism 70 includes a bolt 71, a spring 72, a lever 73, a steel cable 74, a first stop 75, and a second stop 76. The bolt 71 is located near the first end 62 of the chair post 61 and can be displaced relative to the chair post 61 between a locked position and an unlocked position. The spring 72 is located between the bolt 71 and the chair post 61, providing elasticity to give the bolt 71 a tendency to displace towards the locked position, for example... Figure 14 The tension of the spring 72 pushes the bolt 71 downwards, causing the tail end of the bolt 71 to extend. The lever 73 is pivotally mounted near the second end 63 of the chair post 61, in this example located at the bottom rear end of the seat 69. A steel cable 74 extends along the chair post 71 (hollow tube) and is connected at both ends to the lever 73 and the bolt 71, respectively, so that turning the lever 73 pulls the bolt 71 towards the unlocked position via the steel cable 74. Figure 14 Pulling upwards inwards retracts the tail end of the bolt 71. The first blocking member 75 and the second blocking member 76 are both metal components, respectively welded to two predetermined positions on the first end 62 of the chassis frame 21' near the chair arm 61. When the movable chair 60 is in the use position and the bolt 71 is in the locked position, the rear side of the tail end of the bolt 71 is blocked by the first blocking member 75, preventing the movable chair 60 from flipping to the idle position. When the movable chair 60 is in the idle position and the bolt 71 is in the locked position, the bottom side of the tail end of the bolt 71 is blocked by the second blocking member 76, preventing the movable chair 60 from flipping to the use position.

[0068] Based on the above structure, the fitness equipment of this preferred embodiment allows users to choose between a predetermined sitting or standing posture for upper limb exercises. If a user wishes to perform upper limb exercises in a sitting position, they can first position the chair 60 in the desired location, sit on the seat 69 facing forward, and then adjust the limb exercise device 40 to a suitable position according to their body type and habits, such as a suitable sitting position, so that the overall fitness equipment presents a comfortable posture. Figures 1 to 3 As shown in the first configuration, the user can sit and operate the handles 42L and 42R, located at an appropriate distance from the chest, for upper limb exercises. During this process, the user's legs are positioned on the left and right sides of the chair arm 61, and both feet can rest on the inclined surface 26 of the ramp 25. (Relatively...) If the user wants to adopt a standing posture for upper limb exercises Before exercising, the area occupied by the chair seat 69 when sitting must be cleared.That is, first place the exercise chair 60 in an unused position, then stand on the base 21 facing forward, and then adjust the limb movement device 40 to a suitable position according to individual body type and habits, such as a suitable standing position, so that the fitness equipment as a whole presents a comfortable posture. Figures 15 to 17 As shown in the second configuration, users can stand and operate the handles 42L and 42R, located at an appropriate distance from their chest, for upper limb exercises. The base 21 forms a footrest area 24 behind the first end 62 of the chair arm 61, allowing the user to stand with both feet on it for upper limb exercises (Note: the user's feet are usually moderately separated, for example, about shoulder-width apart, and may be staggered depending on personal preference). When the chair 60 is in the use position, the seat 69 is located above the footrest area 24. This means that unless the chair 60 is moved from the use position, the user cannot comfortably stand behind the handles 42L and 42R for upper limb exercises.

[0069] The fitness equipment also allows users in wheelchairs who have difficulty getting up to perform upper limb exercises. When using it, the chair 60 must first be in an idle position. Then, the user sits in the wheelchair and moves forward from the rear of the fitness equipment onto the chassis 21. The bottom ends of the wheels on both sides of the wheelchair slightly sink into the recesses 29 on the left and right sides of the chassis 21. If the wheelchair has a braking device, it further locks the wheels to prevent the wheelchair from sliding forward or backward. Next, the limb movement device 40 is adjusted to a suitable position, such as a comfortable sitting position, so that the entire fitness equipment presents a comfortable posture. Figure 19 As shown, if necessary, the indentations 29 where the wheels of the wheelchair are inserted can be adjusted to change their forward and backward position, allowing the user to operate the handles 42L and 42R, located at an appropriate distance from the chest, while seated in the wheelchair for upper limb exercises. After finishing the exercise, the user keeps facing forward and moves the wheelchair backward away from the chassis 21. The rear left and right sides of the chassis 21 form slopes 211, facilitating wheelchair entry and exit. The fitness equipment provides upper limb exercises for wheelchair users in the above manner. Since the movable chair 60 is not used, it also belongs to the second type.

[0070] In other possible embodiments of the invention (not shown), the bottom of the frame does not have a chassis-like part, or at least does not have the left and right sides of a chassis. When the user performs upper limb movements in a standing position, both feet are on the ground. When a user in a wheelchair performs upper limb movements, the wheels of the wheelchair are also on the ground, unlike in the previous example where they are on the bottom (chassis) of the frame.

[0071] In this preferred embodiment, to flip the movable chair 60 from its active position to its idle position, or vice versa, the user must operate the lever 73 located at the second end 63 of the chair post 61. This retracts the tail end of the bolt 71 located at the first end 62 of the chair post 61, preventing it from being blocked by the first blocking member 75 or the second blocking member 76. In other words, the locking mechanism 70 changes from a locked state to an unlocked state, allowing the movable chair 60 to be flipped. When the movable chair 60 is in its active position, the seat 69 faces directly upwards, and the straight section 67 of the chair post 61 extends from front to back along the bottom side of the seat 69. This allows the lever 73 located at the second end 63 of the chair post 61 to be positioned at the bottom rear end of the seat 69, making it convenient for the user to reach out and operate the lever to flip the movable chair 60. When the movable chair 60 is in an idle position, the seat 69 is generally facing forward, and the straight section 67 of the chair arm 61 extends from bottom to top on the rear side of the seat 69, so that the lever 73 is located at the high point of the movable chair 60, making it convenient for the user to reach out and turn the movable chair 60 over.

[0072] Before flipping the active chair 60, the user may need to raise the rear end of the limb movement device 40, depending on the situation. To a certain extent, this is to prevent the movable chair 60 from colliding with the limb movement device 40 (especially the left handlebar 42L) during the flipping process. In other words, at least when the limb movement device 40 is in the appropriate standing position, the movable chair 60 can freely flip between the used position and the idle position without interfering with the limb movement device 40. Figure 16 As shown, when the limb movement device 40 is in the standing position and the movable chair 60 is in the idle position, the highest part of the movable chair 60 is higher than the lowest part of the limb movement device 40. Of course, the design can be optimized by appropriately setting the relative positions and range of motion of the movable chair 60 and the limb movement device 40 to completely eliminate the risk of collision. In other possible embodiments of the invention (not shown), the limb movement device for upper limb exercises is fixed at a predetermined height, and there are basically no major problems for the user whether sitting or standing. Furthermore, the movable chair can also be designed with an adjustable seat height.

[0073] Readers should understand that the technical focus of this invention lies in the handling of the seat component when performing limb movements using and without the seat component. Although the limb movement device in the preferred embodiment described above is specifically designed for upper limb movements, the limb movement device in this invention may also be designed for lower limb movements, or a device that allows for simultaneous upper and lower limb movements. The second type of fitness equipment of this invention (i.e., the type where the active chair is in an idle position) is designed either to allow users to perform the provided upper limb movements while standing, or to allow users in wheelchairs to perform the provided upper and / or lower limb movements.

[0074] As described above, the fitness equipment of the present invention can switch between a first mode using the seat component and a second mode without the seat component, depending on the user's movement method. When the user switches manually, the seat component (i.e., the movable chair) can be easily and quickly flipped between the used and idle positions. Depending on the implementation, the present invention may also utilize an electric mechanism to drive the movable chair to flip (and drive the limb movement device to rise and fall), allowing the fitness equipment to switch between the two modes. In any case, when the seat component of the present invention is not in use, it does not need to be removed and placed outside the fitness equipment, resulting in better overall space utilization.

[0075] The fitness equipment of this invention allows users more diverse choices in the movement of their hands or feet, and provides a high degree of freedom and continuity during exercise. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this invention, and not to limit it; although the invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the above embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and protection scope of the technical solutions of the embodiments of this invention.

Claims

1. A fitness equipment comprising: A frame; A limb movement device is provided on the frame and has a left moving part, a right moving part, a flywheel and a transmission mechanism. The left moving part and the right moving part are respectively operated by the user's hands or feet and can rotate independently around an axis corresponding to the left and right axes. Moreover, when rotating, the flywheel can be driven to rotate via the transmission mechanism. Its features are: The transmission mechanism has a left transmission mechanism and a right transmission mechanism; the left transmission mechanism is located between the left moving member and the flywheel, so that the left moving member can drive the flywheel to rotate in a predetermined direction regardless of whether it rotates in a forward or reverse direction; the right transmission mechanism is located between the right moving member and the flywheel, so that the right moving member can drive the flywheel to rotate in the predetermined direction regardless of whether it rotates in the forward or reverse direction.

2. The fitness equipment as described in claim 1, characterized in that: The right-side transmission mechanism has a first sprocket and a second sprocket. When the right-side moving member rotates, it drives the first sprocket and the second sprocket to rotate in opposite directions. The left-side transmission mechanism has a third sprocket and a fourth sprocket. When the left-side moving member rotates, it drives the third sprocket and the fourth sprocket to rotate in opposite directions. The transmission mechanism also has a pulley. The axes of the first sprocket, the second sprocket, the third sprocket, the fourth sprocket, and the pulley all correspond to the left and right axes. Each sprocket and the pulley are unidirectionally connected. Rotation of any sprocket in the forward direction will drive the pulley to rotate in the forward direction, and rotation of any sprocket in the reverse direction will not drive or affect the rotation of the pulley. When the pulley rotates in the forward direction, it will drive the flywheel to rotate in the predetermined direction.

3. The fitness equipment as described in claim 2, characterized in that: The right-side transmission mechanism has a chain disc and a transmission chain. The chain disc rotates with the right-side moving member. The transmission chain simultaneously wraps around the chain disc and the first sprocket. The second sprocket meshes with the outer edge of the transmission chain. The left-side transmission mechanism has another chain disc and another transmission chain. The other chain disc rotates with the left-side moving member. The other transmission chain simultaneously wraps around the other chain disc and the third sprocket. The fourth sprocket meshes with the outer edge of the other transmission chain.

4. The fitness equipment as described in claim 2, characterized in that: The first sprocket is coaxially connected to the pulley, and the first sprocket is a clutch sprocket. When the first sprocket rotates in the forward direction, it can push the pulley to rotate in the same direction. When the first sprocket rotates in the reverse direction, it will disengage from the pulley. The third sprocket is coaxially connected to the pulley, and the third sprocket is a clutch sprocket. When the third sprocket rotates in the forward direction, it can push the pulley to rotate in the same direction. When the third sprocket rotates in the reverse direction, it will disengage from the pulley.

5. The fitness equipment as described in claim 2, characterized in that: The transmission mechanism further includes a first transmission sprocket, a second transmission sprocket, and a transmission chain that simultaneously wraps around the first transmission sprocket and the second transmission sprocket; the second sprocket is coaxially connected to the first transmission sprocket, and the second sprocket is a clutch sprocket. When the second sprocket rotates in the forward direction, it can push the first transmission sprocket to rotate in the same direction. When the second sprocket rotates in the reverse direction, it will disengage from the first transmission sprocket. The fourth sprocket is coaxially connected to the first transmission sprocket, and the fourth sprocket is a clutch sprocket. When the fourth sprocket rotates in the forward direction, it can push the first transmission sprocket to rotate in the same direction. When the fourth sprocket rotates in the reverse direction, it will disengage from the first transmission sprocket. The second transmission sprocket is coaxially connected to the pulley, and when the second transmission sprocket rotates in the forward direction, it can drive the pulley to rotate in the same direction.

6. The fitness equipment as described in claim 1, characterized in that: The user can choose to make the left moving part and the right moving part rotate synchronously or rotate independently.

7. The fitness equipment as described in claim 6, characterized in that: The limb movement device has a left crankshaft, a right crankshaft, a left crank arm, and a right crank arm. The left crankshaft and the right crankshaft are coaxially opposite each other, and each crankshaft has an inner groove. The left crank arm and the right crank arm are respectively fixed to the outer ends of the left crankshaft and the right crankshaft. The left-side moving part and the right-side moving part are respectively connected to the left crank arm and the right crank arm. A central shaft coaxially passes through the left crankshaft and the right crankshaft, and can be used by the user. The operation involves axial displacement; a block is fixed on the central shaft, and the block can move between an engaged position and a disengaged position as the central shaft moves axially. When the block is in the disengaged position, the block is completely accommodated in one of the slots, allowing the left crankshaft and the right crankshaft to rotate independently. When the block is in the engaged position, the left and right sides of the block are respectively engaged in the two slots, allowing the left crankshaft and the right crankshaft to rotate synchronously.

8. The fitness equipment as described in claim 7, characterized in that: Depending on the user's choice, when the insert is in the engaged position, the left crank arm and the right crank arm may be in the same position or in opposite positions that are 180 degrees apart.

9. The fitness equipment as described in claim 7, characterized in that: Each of the slots is provided with a magnet, which can attract the insert located in the slot.

10. The fitness equipment as described in claim 7, characterized in that: The two opposite ends of the central shaft extend out of the left crankshaft and the right crankshaft respectively, and are provided with a ball-shaped handle.

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