Resistance-adjustable spinning

Abstract

The resistance-adjustable spinning comprises a spinning body, a magnetic metal flywheel is rotationally arranged in the spinning body, a magnetic control assembly used for applying resistance to the flywheel is arranged on the spinning body, and the magnetic control assembly comprises a fixing shell, an adjusting piece, a magnet block and a stay rope assembly arranged between the adjusting piece and the magnet block. The fixing shell is fixed to a vehicle body, a mounting cavity is formed in the fixing shell, the adjusting piece is provided with a rotating cylinder which extends into the mounting cavity and rotates relative to the fixing shell, the magnet block is arranged in the vehicle body in a sliding mode, one end of the inhaul cable assembly is fixedly connected with the rotating cylinder, and the other end of the inhaul cable assembly extends into the vehicle body and is fixedly connected with the magnet block. And an elastic limiting piece for limiting the rotating drum is arranged in the mounting cavity. Compared with the prior art, the magnetic control assembly has the advantages that the magnet block and the inhaul cable assembly of the magnetic control assembly are both arranged in the vehicle body, the magnetic control assembly is attractive, the magnet block and the inhaul cable assembly can be prevented from being damaged by the outside, and the service life of the magnetic control assembly is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of spinning bikes, in particular to a spinning bike with adjustable resistance. Background Art

[0002] A spinning bike is similar to a bicycle and is a piece of indoor fitness equipment. It is simple and easy to learn and can provide aerobic exercise for the whole body, overcoming the shortcomings of outdoor bicycles. However, after a trainee's physical fitness has improved after training for a period of time, continuing to use the same spinning bike will greatly weaken the training effect and cannot meet the normal needs of training. Therefore, some spinning bikes with adjustable resistance have appeared on the market.

[0003] For example, the Chinese utility model patent "Fitness Bicycle Resistance Adjustment Device" with patent publication number CN205339977U includes an inertia metal wheel, an armrest column and a seat column. The inertia metal wheel is installed on the seat column through a metal wheel mounting frame. The resistance adjustment device includes an adjustment handle, an adjustment disk, a fixed plate, a connecting rod and a magnetic control assembly. The adjustment handle and the adjustment disk are fixedly connected, the fixed plate is fixedly connected to the armrest column, the adjustment disk is hinged to the fixed plate and can rotate relative to the fixed plate, the fixed plate is provided with an elastic stop column, and the adjustment disk is provided with a plurality of positioning holes that can cooperate with the elastic stop columns. One end of the connecting rod is hinged to the adjustment handle, and the other end is hinged to the magnetic control assembly. The end of the magnetic control assembly is hinged to the metal wheel mounting frame.

[0004] In the above solution, the resistance is adjusted by rotating the adjustment disk to drive the connecting rod to produce displacement, thereby changing the simple distance between the magnetic control component and the metal wheel, thereby changing the resistance of the magnetic control component to the metal wheel. However, the connecting rod occupies a large space and is exposed to the outside, which is not aesthetically pleasing. In addition, it may wear out during use or be damaged by external force, resulting in the failure of the resistance adjustment function. Utility Model Content

[0005] The utility model addresses the problem that the connecting rod for adjusting the resistance of a spinning bike occupies a large space, is exposed to the outside, is not aesthetically pleasing, and is easily damaged. The technical problem to be solved by the utility model is to provide a spinning bike with adjustable resistance to solve the above problem.

[0006] The technical solution adopted by the utility model to solve the above-mentioned technical problems is as follows: it includes a vehicle body, a magnetic metal flywheel is rotatably provided in the vehicle body, and a magnetic control component for applying resistance to the flywheel is provided on the vehicle body, the magnetic control component includes a fixed shell, an adjusting member, a magnet block, and a cable assembly arranged between the adjusting member and the magnet block, the fixed shell is fixed to the vehicle body and has an installation cavity, the adjusting member has a rotating drum that extends into the installation cavity and rotates relative to the fixed shell, the magnet block is slidably arranged in the vehicle body, one end of the cable assembly is fixedly connected to the rotating drum, and the other end extends into the vehicle body and is fixedly connected to the magnet block, an elastic limiting member for limiting the position of the rotating drum is provided in the installation cavity, when the adjusting member is rotated to cause the rotating drum to rotate forward or reverse relative to the installation cavity, the rotating drum drives the cable assembly to pull the magnet block to slide in the vehicle body gradually closer to or away from the flywheel, thereby changing the area covered by the magnet block on the flywheel to adjust the resistance of the spinning bike, and the rotating drum is limited by the elastic limiting member.

[0007] A further preferred solution of the present utility model is: the vehicle body includes a frame and a protective seat fixedly connected to the frame to partially wrap the frame therein; a mounting seat is provided on the handrail riser of the frame; the fixed shell is fixedly connected to the mounting seat; a mounting hole communicating with the mounting cavity is provided on the handrail riser; a mounting chamber is provided in the protective seat; the magnet block and the flywheel are located in the mounting chamber; the cable assembly enters the handrail riser and the mounting chamber through the mounting hole and is connected to the magnet block.

[0008] A further preferred solution of the present utility model is: the rotating drum includes a circular sleeve and a circular limiting cylinder arranged on one side of the circular sleeve, the circular sleeve and the circular limiting cylinder are fixedly connected and their axes are collinear, an annular groove is provided between the circular sleeve and the circular limiting cylinder, a notch is provided on the circular limiting cylinder which is connected to the annular limiting groove, a fixing hole is provided near the notch of the circular limiting sleeve, one end of the cable assembly is fixed in the fixing hole, and the other end passes through the notch and enters the vehicle body through the annular groove and is fixed to the magnet block.

[0009] A further preferred solution of the present invention is: the cable assembly includes a first cable and a second cable, both ends of the first cable and the second cable have connecting heads, the frame is located in the installation room and is respectively provided with a first fixing plate and a second fixing plate on both sides, a pulley is rotatably provided on the first fixing plate, and the magnet block is provided with a magnet fixing seat corresponding to the positions of the first fixing plate and the second fixing plate, the two connecting heads at one end of the first cable and the second cable are both fixed in the fixing holes, and the first cable passes through the annular groove above the notch, and the second cable passes through the annular groove below the notch, the other end of the first cable passes through the second fixing plate and is clamped with the magnet fixing seat through the connecting head, the other end of the second cable passes through the second fixing seat and is sleeved on the pulley, and is clamped on the other side of the magnet fixing seat through the connecting head.

[0010] A further preferred solution of the present invention is: a cable sleeve is provided on each of the first cable and the second cable, and a through-hole is provided on the second fixing plate for the first cable and the second cable to pass through respectively, one end of the two cable sleeves is respectively located in the through-hole and is threadedly engaged with two fastening bolts, the two fastening bolts are respectively located on both sides of the through-hole, and the other end of the two cable sleeves is provided with a fixing sleeve, the diameter of the fixing sleeve is larger than the aperture of the mounting hole, the fixing sleeve is located in the mounting cavity and rests against the mounting hole.

[0011] A further preferred solution of the present utility model is: the elastic limiting part includes a gear, a limiting pin and a limiting bead, the cross-section of the limiting pin is polygonal, the middle part of the rotating drum and the gear is provided with a limiting hole that cooperates with the limiting pin, the limiting pin passes through the limiting holes of the rotating drum and the gear in turn to fix the gear on the rotating drum, the inner wall of the fixed shell is provided with a limiting groove that cooperates with the limiting bead, the limiting bead is located on the limiting groove, and a reset spring is provided in the limiting groove, one end of the reset spring abuts against the bottom of the limiting groove, and the other end abuts against the limiting bead, and the limiting bead cooperates with the tooth groove of the gear to limit the gear.

[0012] A further preferred solution of the present invention is that: the middle of the limit pin has a socket, a latch is provided in the socket, and both ends of the latch extend out of the socket and are rotatably connected to the inner walls of both sides of the installation cavity.

[0013] A further preferred solution of the present utility model is: the adjusting member includes a handle and the rotating drum, the handle is fixedly connected to the rotating drum, the fixed shell is provided with a strip hole connected to the mounting cavity and arranged along the rotation direction of the rotating drum, the handle extends from the strip hole to the outside of the mounting cavity and can slide in the strip hole.

[0014] A further preferred solution of the present invention is that the notch is located on a side of the circular limiter close to the handle.

[0015] A further preferred solution of the present invention is: a connecting sleeve is fixedly provided on the side of the magnet block away from the flywheel, a sliding rod with both ends fixed to the frame is slidingly provided in the connecting sleeve, and when the handle drives the rotating drum to rotate, the cable assembly can drive the magnet fixing seat to slide along the sliding rod.

[0016] Compared with the prior art, the present invention has the following advantages: the magnet block and the cable assembly of the magnetic control assembly are both arranged in the vehicle body, which is not only beautiful, but also can prevent the cable assembly and the magnet block from being worn by the outside world during the use of the spinning bike, or the magnet block and the cable assembly from being damaged due to external forces, and the resistance adjustment function from becoming ineffective, thereby extending the service life of the magnetic control assembly; at the same time, the cable assembly is always located in the vehicle body during the process of adjusting the resistance. Compared with the prior art, the present invention occupies less space. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are only drawn for the purpose of explaining the preferred embodiments and therefore should not be regarded as limiting the scope of the present invention. In addition, unless otherwise specified, the drawings only conceptually represent the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of a preferred embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the adjusting member of the preferred embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of the preferred embodiment of the utility model after the vehicle body is disassembled;

[0021] Figure 4 This is the preferred embodiment of the utility model Figure 3 A partial enlarged view of point A in the middle;

[0022] Figure 5 This is an exploded view of the adjusting member of the preferred embodiment of the utility model;

[0023] Figure 6 This is a schematic diagram of the three-dimensional structure of the drum and the handle of the preferred embodiment of the utility model;

[0024] Figure 7 This is a schematic diagram of the three-dimensional structure of the preferred embodiment of the utility model after disassembling the protective seat and the cable assembly on one side;

[0025] Figure 8 This is the preferred embodiment of the utility model Figure 7 A partial enlarged view of point B in the middle.

[0026] In the figure: 1, vehicle body; 11, vehicle frame; 111, handrail riser; 112, mounting seat; 114, first fixing plate; 1141, pulley; 1142, circular track; 115, second fixing plate; 116, perforation; 12, protective seat; 121, mounting chamber; 2, flywheel; 3, magnetic control assembly; 31, fixing shell; 311, mounting cavity; 312, strip hole; 313, limiting groove; 32, adjusting member; 321, rotating cylinder; 3211, circular sleeve; 3212, circular limiting cylinder; 3213, fixing hole; 32 14. Notch; 3215. Annular groove; 322. Handle; 33. Magnet block; 331. Magnet fixing seat; 332. Snap-in hole; 333. Connecting sleeve; 334. Slide rod; 34. Cable assembly; 341. First cable; 342. Second cable; 343. Connector; 344. Cable sleeve; 345. Fixing sleeve; 346. Fastening bolt; 4. Elastic limiter; 41. Gear; 42. Limit pin; 43. Limit bead; 44. Limit hole; 45. Socket; 46. Pin; 47. Card slot; 48. Card. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0028] It should be noted that like reference numerals denote like items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0029] This embodiment mainly describes a spinning bike with adjustable resistance, as follows:

[0030] like Figures 1 to 8As shown, a resistance-adjustable spinning bike includes a body 1, a flywheel 2 is rotatably provided in the body 1, and the flywheel 2 is made of a magnetic metal, such as iron, cobalt, nickel, alloys thereof, ferrite, and the like. The body 1 is provided with a magnetic control assembly 3 for applying resistance to the flywheel 2, and the magnetic control assembly 3 includes a fixed shell 31, an adjusting member 32, a magnet block 33, and a cable assembly 34 provided between the adjusting member 32 and the magnet block 33. The fixed shell 31 is fixed to the body 1 and has a mounting cavity 311 therein. The mounting cavity 311 is used to mount the adjusting member 32. The adjusting member 32 has a rotating drum 321 extending into the mounting cavity 311 and rotating relative to the fixed shell 31. The magnet block 33 is slidably provided at the mounting cavity 311. Inside the bicycle body 1, one end of the cable assembly 34 is fixedly connected to the rotating drum 321, and the other end extends into the bicycle body 1 and is fixedly connected to the magnet block 33. An elastic stopper 4 is provided in the mounting cavity 311 to limit the position of the rotating drum 321. When the adjusting member 32 is rotated to rotate the rotating drum 321 forward or reverse relative to the mounting cavity 311, the rotating drum 321 drives the cable assembly 34 to move. The cable assembly 34 pulls the magnet block 33 to slide gradually closer to or away from the flywheel 2 within the bicycle body 1. As the cable assembly 34 is pulled, the contact area between the magnet block 33 and the flywheel 2 increases or decreases. The coverage area of the magnet block 33 and the flywheel 2 increases, and the resistance to the flywheel 2 increases, and vice versa. The resistance of the spinning bike is adjusted by adjusting the area of the magnet block 33 covering the flywheel 2, and the elastic stopper 4 limits the position of the rotating drum 321. The magnet block 33 and the cable assembly 34 of the magnetic control assembly 3 are both arranged inside the vehicle body 1, which is not only beautiful, but also can prevent the cable assembly 34 and the magnet block 33 from being worn by the outside world during the use of the spinning bike, or the magnet block 33 and the cable assembly 34 from being damaged by external forces and the resistance adjustment function from failing, thereby extending the service life of the magnetic control assembly 3; at the same time, the cable assembly 34 is always located inside the vehicle body 1 during the process of adjusting the resistance. Compared with the existing technology, the utility model occupies less space.

[0031] Specifically, in order to enhance the resistance of the magnet block 33 to the flywheel 2 , the magnet block 33 is disposed on one side of the flywheel 2 , and the magnet block 33 is arc-shaped, with the center of the magnet block 33 coincident with the center of the flywheel 2 .

[0032] like Figure 1 As shown, the vehicle body 1 includes a frame 11 and a protective seat 12 fixedly connected to the frame 11 to partially wrap the frame 11. A mounting seat 112 is provided on the armrest riser of the frame 11 by screws. The fixing shell 31 is fixedly connected to the mounting seat 112 by screws. The armrest riser 111 is provided with a mounting hole communicating with the mounting cavity 311. The protective seat 12 has a mounting chamber 121, as shown in FIG. Figure 8As shown, the magnet block 33 and the flywheel 2 are located in the installation chamber 121, and the protective seat 12 mainly plays a protective role. The flywheel 2 and the magnet block 33 are arranged in the installation chamber 121 of the protective seat 12, which greatly reduces the probability of the flywheel 2 and the magnet block 33 being damaged by external forces. The cable assembly 34 enters the handrail riser 111 and the installation chamber 121 through the installation hole and is connected to the magnet block 33.

[0033] like Figure 2 、 Figure 5 and Figure 6 As shown, the rotating cylinder 321 includes a circular sleeve 3211 and a circular limiting cylinder 3212 arranged on one side of the circular sleeve 3211. The circular sleeve 3211 and the circular limiting cylinder 3212 are fixedly connected and their axes are colinear. Preferably, the circular sleeve 3211 and the circular limiting sleeve are integrally formed. There is an annular groove 3215 between the circular sleeve 3211 and the circular limiting cylinder 3212. The annular groove 3215 guides and limits the cable assembly 34 to prevent the cable assembly 34 from slipping during movement. A fixing hole 3213 is provided near the notch 3214 of the circular limiting sleeve. One end of the cable assembly 34 is fixed in the fixing hole 3213, and the other end passes through the notch 3214 and passes through the annular groove 3215 from the handrail riser 111 to enter the installation chamber 121 and is fixed to the magnet block 33.

[0034] like Figure 2 、 Figure 3 and Figure 4As shown, the cable assembly 34 includes a first cable 341 and a second cable 342, both ends of the first cable 341 and the second cable 342 have a connector 343, and the frame 11 is provided with a first fixing plate 114 and a second fixing plate 115 on both sides of the mounting chamber 121, respectively. A pulley 1141 is rotatably provided on the first fixing plate 114, and a concave annular track 1142 is provided on the pulley 1141. A magnet fixing seat 331 corresponding to the position of the first fixing plate 114 and the second fixing plate 115 is provided on the magnet block 33, and the magnet fixing seat 331 is located between the first fixing plate 114 and the second fixing plate 115. Two snap-in holes 332 with openings are provided on the magnet fixing seat 331, and the diameter of the snap-in holes 332 is smaller than the connector. 343 in width, the two connectors 343 at one end of the first cable 341 and the second cable 342 are clamped and fixed in the fixing hole 3213, and the first cable 341 passes through the annular groove 3215 above the notch 3214, and the second cable 342 passes through the annular groove 3215 below the notch 3214, the other end of the first cable 341 passes through the second fixing plate 115 and is clamped to one side of the magnet fixing seat 331 through the connector 343 and one of the clamping holes 332 of the magnet fixing seat 331, the other end of the second cable 342 passes through the second fixing seat and is sleeved on the annular track 1142 of the pulley 1141, and is clamped to the other side of the magnet fixing seat 331 through the connector 343 and the other clamping hole 332 of the magnet fixing seat 331. When the rotating adjustment member 32 rotates clockwise, the rotating drum 321 drives the first cable 341 to move, and the first cable 341 pulls the magnet block 33 laterally away from the flywheel 2. As the first cable 341 pulls, the coverage area of the magnet block 33 and the flywheel 2 becomes smaller and smaller, and the resistance of the magnet block 33 to the flywheel 2 becomes smaller and smaller; when the rotating adjustment member 32 rotates counterclockwise, the rotating drum 321 drives the second cable 342 to move, and the second cable 342 pulls the magnet block 33 laterally closer to the flywheel 2. As the second cable 342 pulls, the coverage area of the magnet block 33 and the flywheel 2 becomes larger and larger, and the resistance of the magnet block 33 to the flywheel 2 becomes larger and larger.

[0035] Specifically, the first cable 341 and the second cable 342 are both provided with a cable sleeve 344, which has a protective effect on the first cable 341 and the second cable 342, preventing the first cable 341 and the second cable 342 from being damaged and broken by friction with the vehicle body 1 during movement. The second fixing plate 115 is provided with a through-hole 116 for the first cable 341 and the second cable 342 to pass through respectively, and one end of the two cable sleeves 344 are respectively located in the through-hole 116 and are screwed together. Two fastening bolts 346 are respectively located on both sides of the through-hole 116. The other ends of the two cable sleeves 344 are provided with fixing sleeves 345. The diameter of the fixing sleeve 345 is larger than the aperture of the mounting hole. The fixing sleeve 345 is located in the mounting cavity 311 and rests against the mounting hole. The two bolts and the fixing sleeve 345 on the cable sleeve 344 respectively have a limiting effect on the two ends of the cable sleeve 344 to prevent the two cable sleeves 344 from moving with the movement of the first cable 341 and the second cable 342.

[0036] like Figure 5 As shown, the elastic limiting member 4 includes a gear 41, a limiting pin 42 and a limiting bead 43. The cross section of the limiting pin 42 is polygonal. A limiting hole 44 is provided in the middle of the rotating cylinder 321 and the gear 41 to cooperate with the limiting pin 42. The limiting pin 42 passes through the limiting holes 44 of the rotating cylinder 321 and the gear 41 in sequence to fix the gear 41 on the rotating cylinder 321. Concave card grooves 47 are provided on both sides of the limiting pin 42. A card 48 is provided in the card groove 47 to press against the rotating cylinder 321 and the gear 41. The axial direction of the limiting pin 42 is provided with an insert Hole 45 is provided with a latch 46 in the insertion hole 45. The two ends of the latch 46 are rotatably mounted on the inner walls of the fixed housing 31 on both sides. The inner wall of the fixed housing 31 is provided with a limiting groove 313 that cooperates with the limiting bead 43. The limiting bead 43 is located in the limiting groove 313. A return spring is provided in the limiting groove 313. One end of the return spring abuts the bottom of the limiting groove 313 and the other end abuts the limiting bead 43. The limiting bead 43 always abuts against the gear 41 and presses the return spring. When the limiting bead 43 cooperates with the tooth groove of the gear 41, the gear 41 is limited. When the gear 41 rotates, the gear teeth on the gear 41 press the limiting bead 43, which presses the return spring. The limiting bead 43 retracts and releases the lock on the gear 41. When the gear 41 stops rotating, the limiting bead 43 is stuck on the tooth groove under the action of the return spring, locking the gear 41.

[0037] like Figure 6As shown, the adjusting member 32 includes a handle 322 and the above-mentioned rotating cylinder 321, the handle 322 is fixedly connected to the rotating cylinder 321, and preferably the handle 322 and the rotating cylinder 321 are integrally formed, and the fixed shell 31 is provided with a bar hole 312 that is connected to the installation cavity 311 and is arranged along the rotation direction of the rotating cylinder 321, the bar hole 312 is an arc-shaped bar hole 312, the circle of the bar hole 312 is collinear with the axis of the rotating cylinder 321, and the handle 322 extends from the bar hole 312 to the installation cavity 311. 11 outside and can slide in the bar hole 312. When the handle 322 is rotated to the uppermost end of the bar hole, the magnet block 33 is farthest away from the flywheel 2, and the resistance of the magnet block 33 to the flywheel 2 is the smallest. When the handle 322 drives the rotating drum 321 to rotate clockwise downward, the magnet block 33 gradually covers the flywheel 2, and the resistance becomes greater and greater. When the handle 322 is rotated to the lowermost end of the bar hole, the magnet block 33 completely covers the flywheel 2, and at this time the resistance of the magnet block 33 to the flywheel 2 is the largest.

[0038] Specifically, the notch 3214 is located on a side of the circular limiter close to the handle 322, so that when the handle 322 drives the first cable 341 and the second cable 342 to move, the movable displacements of the two cables are equal.

[0039] like Figure 4 and Figure 8 As shown, a connecting sleeve 333 is fixedly provided on the side of the magnet block 33 away from the flywheel 2, and a sliding rod 334 with both ends fixed on the frame 11 is slidingly provided in the connecting sleeve 333. When the handle 322 drives the rotating drum 321 to rotate, the cable assembly 34 can drive the magnet fixing seat 331 to slide along the sliding rod 334.

[0040] Specifically, the fixed shell 31 is provided with a gear scale along the edge of the strip hole 312. Each gear represents that the magnet block 33 applies a different resistance to the flywheel 2. When the rotating handle 322 is aligned with one of the scales, the resistance of the magnet block 33 to the flywheel 2 is the resistance value of that gear. By rotating the handle 322 to switch between different gear scales, the resistance of the flywheel 2 can be adjusted, which is relatively simple and intuitive to operate.

[0041] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the product of the present invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0042] The above is a detailed introduction to the resistance-adjustable exercise bike provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the present invention and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A spinning bike with adjustable resistance, comprising a body, a magnetic metal flywheel rotatably disposed within the body, and a magnetic control assembly for applying resistance to the flywheel, the body being provided with: The magnetic control component includes a fixed shell, an adjusting part, a magnet block, and a cable assembly arranged between the adjusting part and the magnet block. The fixed shell is fixed on the vehicle body and has an installation cavity in the fixed shell. The adjusting part has a rotating drum that extends into the installation cavity and rotates relative to the fixed shell. The magnet block is slidably arranged in the vehicle body. One end of the cable assembly is fixedly connected to the rotating drum, and the other end extends into the vehicle body and is fixedly connected to the magnet block. An elastic limiting part for limiting the position of the rotating drum is provided in the installation cavity. When the adjusting part is rotated to cause the rotating drum to rotate forward or reverse relative to the installation cavity, the rotating drum drives the cable assembly to pull the magnet block to slide in the vehicle body, gradually approaching or away from the flywheel, thereby changing the area of the flywheel covered by the magnet block to adjust the resistance of the spinning bike, and the rotating drum is limited by the elastic limiting part.

2. The resistance-adjustable spinning bike according to claim 1, characterized in that: The vehicle body includes a frame and a protective seat fixedly connected to the frame to partially wrap the frame. A mounting seat is provided on the handrail riser of the frame. The fixed shell is fixedly connected to the mounting seat. A mounting hole communicating with the mounting cavity is provided on the handrail riser. An mounting chamber is provided in the protective seat. The magnet block and the flywheel are located in the mounting chamber. The cable assembly enters the handrail riser and the mounting chamber through the mounting hole and is connected to the magnet block.

3. The resistance-adjustable spinning bike according to claim 2, characterized in that: The rotating drum includes a circular sleeve and a circular limiting cylinder arranged on one side of the circular sleeve. The circular sleeve and the circular limiting cylinder are fixedly connected and their axes are collinear. An annular groove is provided between the circular sleeve and the circular limiting cylinder. A notch connected to the annular limiting groove is provided on the circular limiting cylinder. A fixing hole is provided near the notch of the circular limiting sleeve. One end of the cable assembly is fixed in the fixing hole, and the other end passes through the notch and enters the vehicle body through the annular groove and is fixed to the magnet block.

4. The resistance-adjustable spinning bike according to claim 3, characterized in that: The cable assembly includes a first cable and a second cable, both ends of the first cable and the second cable have connecting heads, and the frame is respectively provided with a first fixing plate and a second fixing plate on both sides of the mounting chamber, a pulley is rotatably provided on the first fixing plate, and a magnet fixing seat corresponding to the positions of the first fixing plate and the second fixing plate is provided on the magnet block, and the two connecting heads at one ends of the first cable and the second cable are fixed in the fixing holes, and the first cable passes through the annular groove above the notch, and the second cable passes through the annular groove below the notch, the other end of the first cable passes through the second fixing plate and is clamped with the magnet fixing seat through the connecting head, and the other end of the second cable passes through the second fixing seat and is sleeved on the pulley, and is clamped on the other side of the magnet fixing seat through the connecting head.

5. The resistance-adjustable spinning bike according to claim 4, characterized in that: The first and second cables are both provided with cable sleeves, and the second fixing plate is provided with through holes for the first and second cables to pass through respectively. One end of the two cable sleeves is respectively located in the through holes and is threadedly engaged with two fastening bolts, and the two fastening bolts are respectively located on both sides of the through holes. The other end of the two cable sleeves is provided with a fixing sleeve, and the diameter of the fixing sleeve is larger than the aperture of the mounting hole. The fixing sleeve is located in the mounting cavity and rests against the mounting hole.

6. The resistance-adjustable spinning bike according to claim 1, characterized in that: The elastic limiting part includes a gear, a limiting pin and a limiting bead. The cross-section of the limiting pin is polygonal. The middle part of the rotating drum and the gear is provided with a limiting hole that cooperates with the limiting pin. The limiting pin passes through the limiting holes of the rotating drum and the gear in turn to fix the gear on the rotating drum. The inner wall of the fixed shell is provided with a limiting groove that cooperates with the limiting bead. The limiting bead is located on the limiting groove. A reset spring is provided in the limiting groove. One end of the reset spring abuts against the bottom of the limiting groove, and the other end abuts against the limiting bead. The limiting bead cooperates with the tooth groove of the gear to limit the gear.

7. The resistance-adjustable spinning bike according to claim 6, characterized in that: The middle part of the limiting pin is provided with an insertion hole, and a latch is arranged in the insertion hole. Both ends of the latch extend out of the insertion hole and are rotatably connected to the inner walls of both sides of the installation cavity.

8. The resistance-adjustable spinning bike according to claim 3, characterized in that: The adjusting member includes a handle and the rotating drum, the handle is fixedly connected to the rotating drum, the fixed shell is provided with a strip hole connected to the mounting cavity and arranged along the rotation direction of the rotating drum, the handle extends from the strip hole to the outside of the mounting cavity and can slide in the strip hole.

9. The resistance-adjustable spinning bike according to claim 8, characterized in that: The notch is located on a side of the circular limiter close to the handle.

10. The resistance-adjustable spinning bike according to claim 8, characterized in that: A connecting sleeve is fixedly provided on the side of the magnet block away from the flywheel. A sliding rod with both ends fixed to the frame is slidably provided in the connecting sleeve. When the handle drives the rotating drum to rotate, the cable assembly can drive the magnet fixing seat to slide along the sliding rod.

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