A new stepper with resistance adjustment mechanism

Abstract

The present invention provides a new stepper with a resistance adjustment mechanism, which includes a base, a pair of pedals, a linkage mechanism, a resistance mechanism and a resistance adjustment mechanism. Compared with the original hydraulic cylinder, the stepper designed by the present invention has lower cost and can increase or decrease the resistance during pedal movement, thereby realizing resistance adjustment during stepper movement.

Description

Technical Field

[0001] The invention relates to the technical field of sports equipment, in particular to a novel stepper with a resistance regulating mechanism. Background Art

[0002] Stairsteppers (also commonly known as stairclimbers) are a type of fitness equipment that enables fitness enthusiasts to repeatedly climb stairs, which can not only enhance the function of the cardiovascular system, but also fully exercise the thigh and calf muscles.

[0003] The resistance source of existing steppers mostly comes from a hydraulic cylinder. For example, in a stepper disclosed in Chinese Patent Publication No. CN218553012U, the device used to form the resistance source is a hydraulic cylinder (i.e., a hydraulic cylinder).

[0004] The above-mentioned stepper using a hydraulic cylinder as a resistance source cannot adjust the magnitude of the resistance and has a high production cost, so there is still room for improvement.

[0005] In view of this, the inventor specially designed a new stepper with a resistance adjustment mechanism, which resulted in the present invention. Summary of the Invention

[0006] In order to solve the above problems, the technical solutions of the present invention are as follows:

[0007] A novel stepper with a resistance adjustment mechanism, comprising:

[0008] A base, wherein a column is provided on one side of the base;

[0009] A pair of pedals are provided on a pedal bracket, and the pedal bracket is symmetrically hinged to both sides of the column through a connecting axis;

[0010] The linkage mechanism includes a support base, a left crank connecting rod, a right crank connecting rod and a linkage shaft. The support base is fixed to the base and is located below the pedal. The linkage shaft is rotatably mounted on the support base. The left crank connecting rod and the right crank connecting rod are vertically fixed to the axial ends of the linkage shaft and extend in opposite directions along the same plane. The other ends of the left crank connecting rod and the right crank connecting rod are vertically provided with rolling shafts rotatably connected thereto. The two rolling shafts are in rolling contact with the bottom surface of the pedal bracket.

[0011] The resistance mechanism includes a friction resistance disk fixed coaxially with the linkage shaft, a friction damping plate movably abutting against the surface of the friction resistance disk, and a resistance adjustment disk for fixing the friction damping plate, wherein the resistance adjustment disk is movably fixed on the support seat in the vertical direction;

[0012] The resistance adjustment mechanism is used to drive the resistance adjustment disk and the friction damping plate to press against the friction resistance disk to increase its rotational resistance.

[0013] Preferably, the cross-section of the support base is U-shaped and includes side plates on both sides and a bottom plate fixed to the base at the bottom. The linkage shaft is rotatably arranged at the top of the two side plates through bearings. A pair of parallel guide bushings are symmetrically arranged at the bottom of the resistance adjustment disc. A pair of guide shafts passing through the guide bushings are arranged between the two side plates. A chute for the vertical movement of the guide shaft is vertically penetrated through the side wall of the side plate.

[0014] Preferably, limiting nuts are provided on the parts of both sides of the guide shaft that penetrate out of the chute.

[0015] Preferably, the resistance adjustment mechanism includes a resistance adjustment knob and a resistance adjustment connecting rod. The resistance adjustment connecting rod is L-shaped and has a bent part. A rotating bushing perpendicular to the plane where the resistance adjustment connecting rod is located is provided at the bent part. A fixed shaft parallel to the linkage shaft is arranged between the two side plates and below the resistance adjustment disc. The rotating bushing is rotatably sleeved outside the fixed shaft. The resistance adjustment knob is arranged on the side of the base away from the column. The two ends of the resistance adjustment connecting rod are respectively movably arranged at the lower end of the resistance adjustment disc and the lower end of the resistance adjustment knob. When the resistance adjustment knob rotates, the end of the resistance adjustment connecting rod located below the resistance adjustment disc moves around the rotating bushing in a direction approaching or departing from the resistance adjustment disc.

[0016] Preferably, an installation seat in a "C" shape is provided at the upper end of the side of the base away from the column. The top of the installation seat forms an installation surface, and a regulating area communicating with the outside is formed between the inner side and the base. The resistance adjustment knob includes a rotating cap and an adjusting bolt body. The adjusting bolt body is threadedly connected to the installation surface and penetrates into the regulating area at the bottom. One end of the resistance adjustment connecting rod extends into the regulating area and is movably abutted against the bottom of the adjusting bolt body.

[0017] Preferably, the resistance adjustment disc includes a first arc plate, a second arc plate arranged coaxially and parallelly, and a plurality of buffer bolts uniformly arranged in the radial direction between the first arc plate and the second arc plate. A buffer spring is arranged between the first arc plate and the second arc plate and outside the buffer bolts. The two ends of the buffer spring respectively abut against the first arc plate and the second arc plate. The friction damping sheet is fixed to the side of the first arc plate facing the friction resistance disc.

[0018] Preferably, the buffer spring is a conical spring, and the wider side of the conical spring faces the side of the first arc plate.

[0019] Preferably, a tightening block is provided in the middle of the second arc plate. The bottom of the tightening block extends downward to form a tightening surface that abuts and cooperates with the end of the resistance adjustment connecting rod.

[0020] Preferably, the linkage shaft extends outward along its circumference to form a fan-shaped connecting portion, the friction resistance disk is arranged at the edge of the connecting portion and remains perpendicular to the plane where the connecting portion is located, and the friction resistance disk is coaxially arranged with the center of the friction damping plate to adapt to the shape of its arc edge.

[0021] Preferably, the surface of the rolling shaft is covered with a rubber sleeve.

[0022] The present invention has the following beneficial effects:

[0023] 1. The up and down stepping motion is achieved by the linkage between the pedals, the left crank connecting rod, the right crank connecting rod, and the linkage shaft. Compared with the existing hydraulic cylinder, the stepper designed in this application has a lower cost. In addition, the friction resistance disk is fixed on the linkage shaft. The resistance adjustment mechanism controls the pressing force and spacing between the resistance adjustment disk and the friction damping plate and the friction resistance disk, thereby increasing or decreasing the resistance generated by the friction damping plate and the friction resistance disk, thereby achieving resistance adjustment of the stepper.

[0024] 2. Through the slide groove, the resistance adjustment mechanism can be used to adjust the vertical position of the resistance adjustment disk, thereby adjusting the resistance of the friction damping plate to the friction resistance disk;

[0025] 3. By rotating the resistance adjustment knob, press down one end of the resistance adjustment connecting rod, so that the other end rotates around the rotating shaft sleeve and the fixed shaft, pushing the friction resistance disk upward to increase the resistance of the friction damping plate to the friction resistance disk, thereby increasing the stepping resistance, otherwise reducing the stepping resistance, thereby facilitating the resistance adjustment of the stepper. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0027] in:

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention highlighting the base and pedals;

[0030] Figure 3 This is a schematic diagram of the partial explosion structure of the present invention highlighting the support seat;

[0031] Figure 4 It is a schematic diagram of a partial explosion structure highlighting the linkage mechanism of the present invention;

[0032] Figure 5 It is a side structural schematic diagram of the present invention;

[0033] Figure 6 It is a schematic cross-sectional view of the present invention;

[0034] Figure 7 It is a schematic diagram of the cross-sectional three-dimensional structure of the present invention.

[0035] Description of labels:

[0036] 1. Base; 11. Side frame; 12. Fixed frame; 13. Column; 14. Pedal mounting shaft; 2. Pedal; 21. Connecting shaft; 22. Pedal bracket; 3. Linkage mechanism; 31. Support seat; 311. Side plate; 312. Bottom plate; 313. Mounting slot; 314. Guide shaft; 315. Slide slot; 316. Fixed shaft; 317. Limit nut; 32. Left crank connecting rod; 33. Right crank connecting rod; 34. Linkage shaft; 341. Limit key shaft; 342. Connecting part; 35. Rolling shaft; 36. Limiting slot; 37. Rotation fixing bolt; 38. Rolling mandrel; 39. Rolling fixing bolt; 4. Block Force mechanism; 41. Friction resistance disk; 42. Friction damping plate; 43. Resistance adjustment disk; 431. First arc plate; 432. Second arc plate; 433. Buffer bolt; 4331. Bolt cap; 4332. Bolt column; 4333. Buffer nut; 44. Guide sleeve; 45. Buffer spring; 5. Resistance adjustment mechanism; 51. Resistance adjustment knob; 511. Rotating cap; 512. Adjusting bolt body; 513. First contact portion; 52. Resistance adjustment connecting rod; 521. Second contact portion; 53. Rotating sleeve; 6. Mounting seat; 61. Mounting surface; 62. Adjustment area; 7. Tightening block; 71. Tightening surface. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] See also Figures 1 to 5 , is a new type of stepper with a resistance adjustment mechanism as the best embodiment of the present invention, including a base 1, a pair of pedals 2, a linkage mechanism 3, a resistance mechanism 4 and a resistance adjustment mechanism 5.

[0039] like Figure 1-3As shown, the base 1 is in the shape of an "I" as a whole, and is composed of circular tube-type side frames 11 on both sides and a square tube-type fixing frame 12 connecting the middle parts of the side frames 11 on both sides. A cylindrical column 13 is erected in the middle part of the side frame 11 on one side, and a pedal mounting shaft 14 is passed through the column 13 near the top along its radial direction. The pedal mounting shaft 14 is parallel to the side frame 11 and the two ends of the pedal mounting shaft 14 are hinged with connecting shafts 21. The two connecting shafts 21 are integrally fixed with pedal brackets 22, and the pedal brackets 22 are kept perpendicular to the connecting shaft 21. The upper ends of the two pedal brackets 22 are provided with pedals 2 for stepping on.

[0040] like Figure 3 、 4 As shown, the linkage mechanism 3 includes a support seat 31, a left crank connecting rod 32, a right crank connecting rod 33 and a linkage shaft 34. The support seat 31 is fixed to the side of the fixing frame 12 close to the column 13 and is located below the pedal 2. The linkage shaft 34 is rotatably arranged on the top of the two side plates 311 through bearings (not shown in the figure). The left crank connecting rod 32 and the right crank connecting rod 33 are vertically fixed to the axial ends of the linkage shaft 34 and extend in opposite directions along the same plane. In this embodiment, the left crank connecting rod 32 is shorter than the right crank connecting rod 33, and the left crank connecting rod 32 is arranged on the side of the bottom of the corresponding side pedal bracket 22 close to the connecting shaft 21. The other ends of the left crank connecting rod 32 and the right crank connecting rod 33 are vertically provided with rolling shafts 35 connected thereto for rotation. The two rolling shafts 35 are in rolling contact with the bottom surface of the pedal bracket 22, so that the pedal 2, the left crank connecting rod 32, the right crank connecting rod 33 and the linkage shaft 34 are linked to realize up and down stepping movement.

[0041] Among them, the support seat 31 has a U-shaped cross-section and includes side panels 311 on both sides and a bottom plate 312 fixed to the base 1 at the bottom. A mounting groove 313 is recessed at the top of the side panel 311, and the linkage shaft 34 rotates through a bearing installed in the mounting groove 313.

[0042] In this application, the left crank connecting rod, the right crank connecting rod and the linkage shaft are split or integrated. In this embodiment, it is specifically defined as split, and the specific implementation is as follows: Figure 4As shown, the two ends of the linkage shaft 34 form a limit key shaft 341, and the inner side of the left crank connecting rod 32 and the right crank connecting rod 33 close to the linkage shaft 34 is provided with a limit groove 36 that is engaged with the limit key shaft 341. The left crank connecting rod 32 and the right crank connecting rod 33 are locked on the limit key shaft 341 by rotating the fixing bolt 37 to achieve synchronous rotation. The left crank connecting rod 32 and the right crank connecting rod 33 are fixed vertically outward at the end away from the linkage shaft 34 to set a rolling core shaft 38. The aforementioned rolling shaft 35 It is in the shape of a shaft sleeve and is limited by a rolling fixing bolt 39 on the outer wall of the rolling core shaft 38 to achieve relative rotation. In addition, in order to enhance the rolling effect of the rolling shaft 35 and the bottom surface of the pedal bracket 22, the surface of the rolling shaft 35 is covered with a rubber sleeve (not shown in the figure), thereby facilitating the alternating synchronous rotation of the left crank connecting rod 32 and the right crank connecting rod 33 and the continuous rolling contact between the rolling shaft 35 and the pedal bracket 22, thereby realizing the alternating linkage of the left and right pedals 2 and thus realizing the up and down stepping movement.

[0043] like Figure 5 、 6 As shown in , 7, the resistance mechanism 4 includes a friction resistance disk 41 fixed coaxially with the linkage shaft 34, a friction damping plate 42 movably abutted against the surface of the friction resistance disk 41, and a resistance adjustment disk 43 for fixing the friction damping plate 42, wherein the fixing method of the friction resistance disk 41 is as follows: the linkage shaft 34 extends outward along its circumference to form a fan-shaped connecting portion 342, the friction resistance disk 41 is arranged at the edge of the connecting portion 342 and remains perpendicular to the plane where the connecting portion 342 is located, the friction resistance disk 41 is coaxially arranged with the center of the circle of the friction damping plate 42 so that the shape of its arc edge is adapted, and the resistance adjustment disk 43 is movably fixed to the support seat 31 in the vertical direction. Specifically, the resistance adjustment disk 43 is arranged between the two side plates 311 and at the lower end of the linkage shaft 34, and a pair of parallel guide sleeves 44 (combined with Figure 3 ), the guide sleeve 44 is kept parallel to the axial direction of the linkage shaft 34, and a pair of guide shafts 314 passing through the guide sleeve 44 are provided between the two side plates 311, and the side walls of the two side plates 311 are pierced with two sliding grooves 315 in the vertical direction for the vertical movement of the guide shafts 314. Therefore, through the sliding grooves 315, the resistance adjustment mechanism 5 can be cooperated with to realize the vertical position adjustment of the resistance adjustment disk 43, thereby realizing the resistance adjustment of the friction damping plate 42 to the friction resistance disk 41.

[0044] Furthermore, the parts of the guide shaft 314 that pass through the slide groove 315 on both sides are provided with limit nuts 317, and the limit nuts 317 are not fully tightened, so that the limit nuts 317 limit the axial position of the guide shaft 314 to prevent it from slipping in the axial direction, and enable the guide shaft 314 to move in the vertical direction where the slide groove 315 is located, thereby realizing the up and down movement of the resistance adjustment disk 43.

[0045] Among them, the resistance adjustment disc 43 includes a first arc-shaped plate 431 and a second arc-shaped plate 432 that are coaxially and parallelly arranged, and a plurality of buffer bolts 433 evenly arranged in the radial direction between the first arc-shaped plate 431 and the second arc-shaped plate 432. The buffer bolt 433 includes a bolt cap 4331, a bolt column 4332, and a buffer nut 4333 threadedly connected to the bolt column 4332. The first arc-shaped plate 431 is provided with a counterbore (not shown in the figure). The bolt cap 4331 is arranged in the counterbore of the first arc-shaped plate 431. The bolt column 4332 passes through the counterbore and the second arc-shaped plate 432 in sequence and is then threadedly connected to the buffer nut 4333. A buffer spring 45 is arranged between the first arc-shaped plate 431 and the second arc-shaped plate 432 and outside the bolt column 4332 to support the first arc-shaped plate 431 and the second arc-shaped plate 432. The two ends of the buffer spring 45 respectively abut against the first arc-shaped plate 431 and the second arc-shaped plate 432. The friction damping sheet 42 is fixed to the side of the first arc-shaped plate 431 facing the friction resistance disc 41. Thus, the buffer spring 45 maintains an outward thrust to realize the resistance of the friction damping sheet 42 to the friction resistance disc 41. At the same time, the first arc-shaped plate 431 and the second arc-shaped plate 432 are movably connected through the buffer spring 45, so that the first arc-shaped plate 431 elastically presses the friction resistance disc 41. Compared with the way that the first arc-shaped plate 431 and the second arc-shaped plate 432 are directly fixedly connected as a whole, the above-mentioned movable connection method is more flexible, controllable and convenient to adjust.

[0046] Furthermore, the buffer spring 45 is a conical spring, and the wider side of the conical spring faces the side of the first arc-shaped plate 431.

[0047] As Figure 3-7 shown, the resistance adjustment mechanism 5 is used to drive the resistance adjustment disc 43 and the friction damping sheet 42 to press against the friction resistance disc 41 to increase its rotational resistance, and includes a resistance adjustment knob 51 and a resistance adjustment link 52. The resistance adjustment link 52 is L-shaped and has a bent portion. A rotary sleeve 53 perpendicular to the plane where the resistance adjustment link 52 is located is fixed to the bent portion (combined with Figure 3 , that is, the rotational axis of the rotary sleeve 53 is parallel to the rotational axis of the linkage shaft 34). A fixed shaft 31,6 parallel to the linkage shaft 34 is fixedly arranged between the two side plates 311 and below the resistance adjustment disc 43. The rotary sleeve 53 is rotatably sleeved outside the fixed shaft 3,16 to realize rotation. On the upper end of the side of the base 1 away from the column 13, there is a "C"-shaped mounting seat 6. The top of the mounting seat 6 forms a mounting surface 61, and a regulating area ,62 communicating with the outside is formed between the inner side and the base 1 (combined with Figure 4), the resistance adjustment knob 51 includes a rotating cap 511 and an adjusting bolt body 512, the adjusting bolt body 512 is threadedly connected to the mounting surface 61 and the bottom is inserted into the adjustment area 62, one end of the resistance adjustment link 52 extends into the adjustment area 62 and movably abuts against the bottom of the adjusting bolt body 512, and the two ends of the resistance adjustment link 52 are movably arranged on the lower end of the resistance adjustment disk 43 and the lower end of the resistance adjustment knob 51, respectively. When the resistance adjustment knob 51 is rotated, the end of the resistance adjustment link 52 located under the resistance adjustment disk 43 moves around the rotating shaft sleeve 53 toward or away from the resistance adjustment disk 43, so that the resistance adjustment disk 43 drives the friction damping plate 42 to further press the friction resistance disk 41 upward to increase the resistance or relax the pressure on the friction resistance disk 41 to reduce the resistance, thereby facilitating the adjustment process of the movement resistance of the pedal 2.

[0048] Furthermore, a spherical first contact portion 513 is provided on the side of the lower end of the adjusting bolt body 512 that contacts the end of the resistance adjusting connecting rod 52 .

[0049] Furthermore, a tightening block 7 is provided in the middle of the second arc-shaped plate 432, and the bottom of the tightening block 7 extends downward to form a tightening surface 71 that abuts against the end of the resistance adjustment link 52, and a spherical second contact portion 521 is provided on the side where the resistance adjustment link 52 contacts the tightening surface 71.

[0050] In particular, in the present application, the friction damping plate 42 is a layered structure capable of contacting the friction resistance disk 41 to generate friction resistance. Therefore, the material selection for the friction damping plate 42 includes but is not limited to cowhide, felt, conveyor belts and vehicle brake pads.

[0051] The working process and effects of the present invention are as follows:

[0052] When the stepper is in use, the user steps on the left and right pedals 2 alternately. When the pedal bracket 22 rotates up and down alternately following the connecting shaft 21, the rolling shaft 35 on the left crank connecting rod 32 and the right crank connecting rod 33 located at the lower end of the pedal bracket 22 drives the left crank connecting rod 32, the right crank connecting rod 33 and the linkage shaft 34 to realize linkage, thereby realizing alternating stepping movement. During stepping, the friction contact generated by the mutual rotation between the friction resistance disk 41 fixed integrally by the linkage shaft 34 and the friction damping plate 42 pressed against the friction resistance disk 41 and the resistance adjustment disk 43 is realized to realize the resistance during stepping movement, and by rotating the resistance adjustment knob 51, the resistance adjustment knob 51 moves downward or upward along the mounting seat 6, thereby causing the resistance adjustment link 52 to move around the rotating shaft sleeve 53 toward or away from the bottom of the second curved plate 432, thereby adjusting the contact resistance between the friction resistance disk 41 and the friction damping plate 42, thereby facilitating the adjustment of the stepping resistance.

[0053] In summary, the up and down stepping movement is achieved by the linkage between the pedal 2, the left crank connecting rod 32, the right crank connecting rod 33 and the linkage shaft 34. Compared with the original hydraulic cylinder, the stepper designed in this application has a lower cost, and the friction resistance disk 41 is fixed on the linkage shaft 34. The resistance adjustment mechanism 5 controls the clamping force and spacing between the resistance adjustment disk 43 and the friction damping plate 42 and the friction resistance disk 41, thereby increasing or decreasing the resistance generated by the friction damping plate 42 and the friction resistance disk 41, thereby realizing resistance adjustment of the stepper.

[0054] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A new stepper with a resistance adjustment mechanism, characterized in that: Comprising: A base, on one side of which there is a column. A pair of pedals, arranged on a pedal bracket, and the pedal bracket is symmetrically hinged to both sides of the column through a connecting axis. A linkage mechanism, including a support base, a left crank connecting rod, a right crank connecting rod and a linkage shaft. The support base is fixed on the base and located below the pedal. The linkage shaft is rotatably arranged on the support base. The left crank connecting rod and the right crank connecting rod are vertically fixed at both axial ends of the linkage shaft and extend in opposite directions along the same plane. The other ends of the left crank connecting rod and the right crank connecting rod are vertically provided with rolling shafts rotatably connected thereto, and the two rolling shafts are in rolling contact with the bottom surface of the pedal bracket. A resistance mechanism, including a friction resistance disc coaxially fixed with the linkage shaft, a friction damping piece movably abutted against the surface of the friction resistance disc, and a resistance adjusting disc for fixing the friction damping piece. The resistance adjusting disc is vertically movably fixed on the support base. A resistance adjusting mechanism for driving the resistance adjusting disc and the friction damping piece to press against the friction resistance disc to increase its rotational resistance. The support base has a U-shaped cross-section and includes side plates on both sides and a bottom plate fixed to the base at the bottom. The linkage shaft is rotatably arranged at the tops of the two side plates through bearings. The bottom of the resistance adjusting disc is symmetrically provided with a pair of parallel guide bushings. A pair of guide shafts passing through the guide bushings are provided between the two side plates, and vertical chutes for the vertical movement of the guide shafts are provided on the side walls of the side plates. The resistance adjusting mechanism includes a resistance adjusting knob and a resistance adjusting connecting rod. The resistance adjusting connecting rod is L-shaped and has a bent portion. A rotary bushing perpendicular to the plane where the resistance adjusting connecting rod is located is provided at the bent portion. A fixed shaft parallel to the linkage shaft is provided between the two side plates and below the resistance adjusting disc. The rotary bushing is rotatably sleeved outside the fixed shaft. The resistance adjusting knob is arranged on the side of the base away from the column. The two ends of the resistance adjusting connecting rod are respectively movably arranged at the lower end of the resistance adjusting disc and the lower end of the resistance adjusting knob. When the resistance adjusting knob rotates, the end of the resistance adjusting connecting rod located below the resistance adjusting disc moves towards or away from the resistance adjusting disc around the rotary bushing. The resistance adjusting disc includes a first arc plate, a second arc plate arranged coaxially and parallelly, and a plurality of buffer bolts evenly arranged radially between the first arc plate and the second arc plate. A buffer spring is provided between the first arc plate and the second arc plate and outside the buffer bolts. The two ends of the buffer spring respectively abut against the first arc plate and the second arc plate. The friction damping piece is fixed on the side of the first arc plate facing the friction resistance disc.

2. A new stepper with a resistance adjustment mechanism according to claim 1, characterized in that: Limit nuts are provided at the parts of the two sides of the guide shaft extending out of the chute.

3. A new stepper with a resistance adjustment mechanism according to claim 1, characterized in that: On the upper end of the side of the base away from the column, there is a "C"-shaped mounting seat. The top of the mounting seat forms a mounting surface, and a regulating area communicating with the outside is formed between the inner side and the base. The resistance adjusting knob includes a rotating cap and an adjusting bolt body. The adjusting bolt body is threadedly connected to the mounting surface and its bottom penetrates into the regulating area. One end of the resistance adjusting connecting rod extends into the regulating area and is movably abutted against the bottom of the adjusting bolt body.

4. A new stepper with a resistance adjustment mechanism according to claim 1, characterized in that: The buffer spring is a conical spring, and the wider side of the conical spring faces the side of the first arc plate.

5. A novel stepper with a resistance adjustment mechanism according to claim 1, characterized in that: A pressing block is provided in the middle of the second arc-shaped plate, and the bottom of the pressing block extends downward to form a pressing surface that abuts and cooperates with the end of the resistance adjustment connecting rod.

6. A new stepper with a resistance adjustment mechanism according to claim 1, characterized in that: The linkage shaft extends outward along its circumference to form a fan-shaped connecting portion, the friction resistance disk is arranged at the edge of the connecting portion and remains perpendicular to the plane where the connecting portion is located, and the friction resistance disk is coaxially arranged with the center of the friction damping plate to adapt to the shape of its arc edge.

7. A new stepper with a resistance adjustment mechanism according to claim 1, characterized in that: The surface of the rolling shaft is covered with a rubber sleeve.

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