A multi-section folding treadmill

Abstract

The application discloses a multi-section folding treadmill, which comprises a running platform, two stands, two handrails, a watch rack and a storage rack. The running platform is provided with a running belt, and the watch rack is provided with an electronic watch. One end of each of the two stands is connected to the front end of the running platform, and the other end of each of the two stands is connected to the two ends of the watch rack and the corresponding handrails. The two stands can be folded relative to the running platform, and the two handrails can be folded relative to the corresponding stands. The storage rack is connected to one side of the watch rack and can be folded relative to the watch rack. The treadmill can be folded in multiple sections to facilitate storage and carrying.

Description

TECHNICAL FIELD

[0001] The present application relates to fitness equipment, in particular to a multi-section folding treadmill. BACKGROUND

[0002] Treadmill is a scientific, convenient and effective indoor fitness equipment, which originated in Europe and America. The increasing awareness of health and the pursuit of higher quality of life make the well-designed, cost-effective, practical and effective treadmill emerge as the times require and be deeply welcomed by the people.

[0003] The existing treadmill can only be folded between the stand and the running platform, and other components cannot be folded. For example, a folding treadmill is disclosed in Chinese Patent No. CN202021195355.8, which comprises a running platform for running or walking, a stand assembly rotatably connected to the running platform to rotate relative to the running platform to a folded state or an unfolded state, a pin lock assembly for controlling the stand assembly and the running platform between the locked fixed state and the unlocked free state in the folded state and the unfolded state. The pin lock assembly includes a switch handle, a connecting rod, at least two springs, at least two pin members, and at least two hole members. The switch handle is eccentrically connected to one end of the connecting rod and is arranged on one side of the running platform. The spring, pin member and hole member are sleeved on the connecting rod. The other end of the connecting rod is provided with a locking member and is arranged on the other side of the running platform. One pin member, one spring and one hole member are arranged opposite to each other to form a pin lock group. Two groups of pin lock groups are arranged between the two stand pipes of the stand assembly and the running platform. The end of the spring abuts against the pin member and / or the hole member.

[0004] The above-mentioned treadmill can only be partially folded, cannot realize complete folding of the machine body, and the folding structure is too complex, so further breakthroughs are needed in portability and folding direction. SUMMARY

[0005] In order to solve the above-mentioned problems of the prior art, the present application provides a treadmill which can be folded in multiple sections to facilitate storage and carrying, and the folding structure is simple.

[0006] The technical problem to be solved by the present application is solved by the following technical scheme:

[0007] A multi-section folding treadmill comprises a running platform, two stands, two handrails, a watch rack and a storage rack. A running belt is arranged on the running platform, and an electronic watch is arranged on the watch rack. One end of each stand is connected to the front end of the running platform on both sides, and the other end is connected to the two ends of the watch rack and the corresponding handrails. The two stands can be folded relative to the running platform, and the two handrails can be folded relative to the corresponding stands. The storage rack is connected to one side of the watch rack and can be folded relative to the watch rack.

[0008] Furthermore, after the treadmill and the columns are folded, the two columns are respectively located outside the two sides of the treadmill and parallel to the treadmill; after the treadmill and the columns are unfolded, the two columns intersect with the treadmill.

[0009] and a first end of the first stop pin is fixedly mounted on the cam frame, and the second end of the first stop pin is fixedly mounted on the cam frame, wherein the first stop pin is fixedly mounted on the cam frame.

[0010] Furthermore, the rotating component includes a first clamping member, a limiting member, an adjusting member and a second clamping member which are sequentially passed through the outside of the first limiting shaft, the adjusting member is rotatably connected to the column, and the first clamping member and the second clamping member clamp the limiting member and the adjusting member; the limiting member is protruded on a surface facing the adjusting member to form a first limiting portion, a second limiting portion and a third limiting portion, the second limiting portion surrounds the outside of the rotation hole of the limiting member, and the first limiting portion and the third limiting portion are located outside both sides of the second limiting portion; the adjusting member is provided with a first limiting hole extending along its axial direction, and the thickness of the adjusting member gradually increases along its axial direction; the second limiting portion is passed through the first limiting hole, and the adjusting member is respectively embedded in the gap between the first limiting portion and the second limiting portion and the gap between the second limiting portion and the third limiting portion on both sides of its first limiting hole.

[0011] Furthermore, an outer tube is sleeved on the outside of the column, and the rotating component also includes two clamping springs arranged on both sides of the limiter, and the two clamping springs extend into the outer tube and are elastically clamped with the inner walls on both sides of the outer tube.

[0012] Furthermore, after the columns and the armrests are folded, the two armrests are respectively located outside the corresponding columns and parallel to the corresponding columns; after the columns and the armrests are unfolded, the two armrests intersect with the corresponding columns.

[0013] Further, the handrail is connected with the stand column through a second rotating device, the second rotating device comprises a second limiting shaft, a second limiting pin, a second shaft sleeve, a second limiting disc, a first rotating disc, a second rotating disc and a limiting key, the second limiting disc is fixedly connected with the table frame, the first rotating disc is rotationally connected with the stand column, the second rotating disc is fixedly connected with the handrail, the second limiting shaft is arranged in the second limiting disc, the first rotating disc and the second rotating disc, one end of the second limiting shaft is connected with the second limiting disc in the axial direction, the other end of the second limiting shaft is connected with the second rotating disc in the axial direction and can rotate in the second limiting disc, the first rotating disc and the second rotating disc, the second limiting disc is located on the side of the first rotating disc away from the second rotating disc, and two second limiting holes are formed in a circle with the second limiting shaft as the center on the second limiting disc, the second limiting pin is arranged in the first rotating disc and the second rotating disc, can move in the axial direction in the first rotating disc and the second rotating disc, and switches to align one of the two second limiting holes with the first rotating disc and the second rotating disc, the limiting key is connected with the second limiting pin to drive the second limiting pin to move in the axial direction, and the second shaft sleeve is sleeved outside the second limiting pin and located between the first rotating disc and the second rotating disc.

[0014] Further, the second rotating device further comprises a support arranged between the first rotating disc and the second rotating disc, the support comprises a first support part, a second support part and a third support part connected in sequence, the first support part and the second support part are arranged at an included angle, the second support part and the third support part are arranged at an included angle, so that an opening is formed between the first support part and the third support part, and the caliber of the opening gradually decreases in the direction of the second support part, and the second limiting shaft is located in the opening of the support.

[0015] Further, the table frame and the storage rack have a plurality of folding positions, each folding position corresponds to a folding angle.

[0016] Furthermore, the watch frame and the storage rack are connected by a third rotating device, and the third rotating device includes a third limit shaft, a limit spring, a first limit shaft sleeve and a second limit shaft sleeve, the first limit shaft sleeve is fixedly connected to the watch frame, and the second limit shaft sleeve is fixedly connected to the storage rack; the third limit shaft is passed through the first limit shaft sleeve and the second limit shaft sleeve, and can rotate and move axially in the first limit shaft sleeve and the second limit shaft sleeve; the limit spring is sleeved outside the third limit shaft, and one end is connected to the first limit shaft sleeve and the other end is connected to the second limit shaft sleeve; the first limit shaft sleeve protrudes toward one end of the second limit shaft sleeve to form a plurality of first limit teeth, and the second limit shaft sleeve protrudes toward one end of the first limit shaft sleeve to form a plurality of second limit teeth, and the plurality of first limit teeth and the plurality of second limit teeth are complementary to each other.

[0017] The present invention has the following beneficial effects: the treadmill has a three-stage folding function, that is, the running platform and the column, the armrest and the column, and the watch frame and the storage rack can all be folded relative to each other. After folding between the running platform and the column, between the armrest and the column, and between the watch frame and the storage rack, the treadmill can be conveniently stored and carried. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a treadmill provided by the present invention;

[0019] Figure 2 This is a schematic structural diagram of the first rotating device in the treadmill provided by the present invention;

[0020] Figure 3 for Figure 2 A schematic structural diagram of the adjusting member and the limiting member in the first rotating device shown;

[0021] Figure 4 This is a schematic structural diagram of the second rotating device in the treadmill provided by the present invention;

[0022] Figure 5 for Figure 4 A schematic structural diagram of a support member in the second rotating device shown;

[0023] Figure 6 This is a schematic structural diagram of the third rotating device in the treadmill provided by the present invention. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0025] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0026] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first," "second," or "third" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0027] In the present invention, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," "fixed," and "disposed" should be understood in a broad sense. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; or internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0028] like Figure 1 As shown, a multi-section folding treadmill includes a treadmill platform 1, two columns 2, two handrails 3, a watch frame 4 and a storage rack 5. The treadmill platform 1 is provided with a treadmill belt 11, and the watch frame 4 is provided with an electronic watch 41; one end of the two columns 2 is respectively connected to the two sides of the front end of the treadmill platform 1, and the other end is respectively connected to the two ends of the watch frame 4 and the corresponding handrails 3. The two columns 2 can be folded relative to the treadmill platform 1, and the two handrails 3 can be folded relative to the corresponding columns 2; the storage rack 5 is connected to one side of the watch frame 4 and can be folded relative to the watch frame 4.

[0029] The treadmill has a three-stage folding function, that is, the running platform 1 and the column 2, the handrail 3 and the column 2, and the watch frame 4 and the storage rack 5 can all be folded relative to each other. After folding between the running platform 1 and the column 2, between the handrail 3 and the column 2, and between the watch frame 4 and the storage rack 5, it can be conveniently stored and carried.

[0030] After the treadmill 1 and the columns 2 are folded, the two columns 2 are respectively located outside the two sides of the treadmill 1 and parallel to the treadmill 1; after the treadmill 1 and the columns 2 are unfolded, the two columns 2 intersect with the treadmill 1.

[0031] In this embodiment, the relative rotation angle between the treadmill 1 and the column 2 when folded or unfolded is greater than 90°.

[0032] The treadmill 1 and the column 2 are connected via a first rotating device 6. Figure 2 and 3 As shown, the first rotating device 6 includes a first limiting shaft 61, a first shaft sleeve 62, a first limiting pin 63, a first limiting disk 64 and a rotating component 65, the first shaft sleeve 62 is connected to the treadmill 1, and the rotating component 65 is connected to the column 2; the first limiting shaft 61 is arranged in the first shaft sleeve 62, the first limiting disk 64 and the rotating component 65, one end of which is connected to the first shaft sleeve 62 along the axial limit, and the other end is connected to the rotating component 65 along the axial limit, and can be in the first axis The first limiting plate 64 is located between the first sleeve 62 and the rotating part 65, and is fixedly connected to the first sleeve 62; the first limiting plate 64 is provided with a limiting arc groove 641 with the first limiting axis 61 as the center, one end of the first limiting pin 63 is fixedly provided on the rotating part 65, and the other end is passed through the limiting arc groove 641; the rotating part 65 is connected to the column 2 and can rotate with the column 2.

[0033] The two ends of the limiting arc groove 641 are equivalent to two limiting gears, one limiting gear corresponds to the folded state between the treadmill 1 and the column 2, and the other limiting gear corresponds to the unfolded state between the treadmill 1 and the column 2. When the column 2 rotates, the rotating component 65 rotates together with the column 2, thereby driving the first limit pin 63 inserted in the limit arc groove 641 to revolve around the first limit axis 61. When the first limit pin 63 revolves due to the rotation of the column 2 to abut against a limit gear in the limit arc groove 641, the limit gear can limit the first limit pin 63 from continuing to revolve, thereby limiting the continued rotation with the column 2, so as to keep the column 2 in a relatively folded position on the treadmill 1. When the first limit pin 63 revolves due to the rotation of the column 2 to abut against another limit gear in the limit arc groove 641, the limit gear can limit the first limit pin 63 from continuing to revolve, thereby limiting the continued rotation with the column 2, so as to keep the column 2 in a relatively unfolded position on the treadmill 1.

[0034] In this embodiment, the first limiting pin 63 is a limiting screw, one end of which is axially limitedly connected to the first sleeve 62 through an enlarged head, and the other end is axially limitedly connected to the rotating component 65 through a screw-nut structure.

[0035] The rotating component 65 includes a first clamping member 651, a limiting member 652, an adjusting member 653 and a second clamping member 654 which are sequentially arranged outside the first limiting shaft 61. The adjusting member 653 is rotatably connected to the column 2. The first clamping member 651 and the second clamping member 654 clamp the limiting member 652 and the adjusting member 653. The limiting member 652 is protruded on one side facing the adjusting member 653 to form a first limiting portion 6521, a second limiting portion 6522 and a third limiting portion 6523. The second limiting portion 6522 surrounds the rotating hole of the limiting member 652. The first limiting portion 6521 and the third limiting portion 6523 are located outside the two sides of the second limiting portion 6522; the adjusting member 653 is provided with a first limiting hole 6531 extending along its axial direction, and the thickness of the adjusting member 653 gradually increases along its axial direction; the second limiting portion 6522 is passed through the first limiting hole 6531, and the adjusting member 653 is respectively embedded in the gap between the first limiting portion 6521 and the second limiting portion 6522 and the gap between the second limiting portion 6522 and the third limiting portion 6523 on both sides of its first limiting hole 6531.

[0036] The rotating component 65 can fine-tune the telescopic length of the column 2 along the axial direction through the second limiting portion 6522 of the limiting member 652 and the first limiting hole 6531 of the adjusting member 653, in conjunction with the clamping of the first clamping member 651 and the second clamping member 654; at the same time, since the thickness of the adjusting member 653 gradually increases along its axial direction, when fine-tuning the telescopic length, the distance between the column 2 and the treadmill 1 can also be fine-tuned synchronously.

[0037] Specifically, the first clamping member 651 and the second clamping member 654 are adjusted in distance by a screw-nut structure on the first limiting shaft 61 to clamp the limiting member 652 and the adjusting member 653 .

[0038] The column 2 is also sleeved with an outer tube 21, and the outer tube 21 is used to limit the relative angle between the column 2 and the adjusting member 653; the rotating component 65 also includes two snap-fitting springs 655 arranged on both sides of the limiting member 652, and the two snap-fitting springs 655 extend into the outer tube 21 and elastically snap-fit ​​with the inner walls on both sides of the outer tube 21 to limit the relative position between the adjusting member 653 and the outer tube 21, while providing a certain buffer.

[0039] After the columns 2 and the armrests 3 are folded, the two armrests 3 are respectively located outside the corresponding columns 2 and parallel to the corresponding columns 2; after the columns 2 and the armrests 3 are unfolded, the two armrests 3 intersect with the corresponding columns 2.

[0040] In this embodiment, the relative rotation angle between the two armrests 3 and the corresponding columns 2 when folded and unfolded is less than 90°.

[0041] Preferably, the thickness of the columns 2 and the handrails 3 are both less than the thickness of the treadmill 1. When the treadmill 1 and the columns 2, and the columns 2 and the handrails 3 are folded simultaneously, the orthographic projections of the two columns 2 and the two handrails 3 on the side of the treadmill 1 do not exceed the upper and lower edges of the treadmill 1, and the overall thickness of the treadmill is not increased.

[0042] The handrail 3 is connected to the column 2 via a second rotating device 7. Figure 4 and 5As shown, the second rotating device 7 includes a second limiting shaft 71, a second limiting pin 72, a second shaft sleeve 73, a second limiting disk 74, a first rotating disk 75, a second rotating disk 76 and a limiting button 77. The second limiting disk 74 is fixedly connected to the watch frame 4, the first rotating disk 75 is rotatably connected to the column 2, and the second rotating disk 76 is fixedly connected to the armrest 3; the second limiting shaft 71 is passed through the second limiting disk 74, the first rotating disk 75 and the second rotating disk 76, one end of which is axially limitedly connected to the second limiting disk 74, and the other end is axially limitedly connected to the second rotating disk 76, and can rotate within the second limiting disk 74, the first rotating disk 75 and the second rotating disk 76; the second The limit plate 74 is located on the side of the first rotating disk 75 facing away from the second rotating disk 76, and two second limit holes 741 are opened on a circumference with the second limit axis 71 as the center; the second limit pin 72 is passed through the first rotating disk 75 and the second rotating disk 76, and can move axially in the first rotating disk 75 and the second rotating disk 76, and switch to align with one of the two second limit holes 741 as the first rotating disk 75 and the second rotating disk 76 rotate; the limit button 77 is connected to the second limit pin 72 to drive the second limit pin 72 to move axially; the second shaft sleeve 73 is sleeved on the outside of the second limit pin 72, and is located between the first rotating disk 75 and the second rotating disk 76.

[0043] When the armrest 3 rotates, the first rotating disk 75 and the second rotating disk 76 rotate together with the armrest 3, thereby driving the second limiting pin 72 to revolve around the second limiting axis 71. When the second limiting pin 72 revolves due to the rotation of the armrest 3 and is inserted into a second limiting hole 741 of the second limiting disk 74, the second limiting hole 741 can limit the second limiting pin 72 from continuing to revolve, thereby limiting the continued rotation of the armrest 3, so as to keep the armrest 3 in a folded position relative to the column 2. When the second limit pin 72 revolves due to the rotation of the armrest 3 and is inserted into another second limit hole 741 of the second limit plate 74, the second limit hole 741 can limit the second limit pin 72 from continuing to revolve, thereby limiting the continued rotation with the armrest 3, so as to keep the armrest 3 in a position relatively expanded with respect to the column 2; and the limit button 77 drives the second limit pin 72 to move axially, so that the second limit pin 72 is inserted into the second limit hole 741, or pulled out from the second limit hole 741.

[0044] In this embodiment, the second limiting pin 72 is a limiting screw, one end of which is axially limitedly connected to the second limiting disk 74 through an enlarged head, and the other end is axially limitedly connected to the second rotating disk 76 through a screw and nut structure.

[0045] The second rotating device 7 also includes a support member 78 arranged between the first rotating disk 75 and the second rotating disk 76, for supporting the distance between the first rotating disk 75 and the second rotating disk 76, and the support member 78 includes a first support portion 781, a second support portion 782 and a third support portion 783 connected in sequence, and the first support portion 781 and the second support portion 782 are arranged at an angle, and the second support portion 782 and the third support portion 783 are arranged at an angle so that an opening is formed between the first support portion 781 and the third support portion 783, and the diameter of the opening gradually becomes smaller in the direction of the second support portion 782; the second limiting shaft 71 is located in the opening of the support member 78.

[0046] There are multiple folding positions between the watch stand 4 and the storage rack 5 , and each folding position corresponds to a folding angle, that is, there are multiple relative rotation angles between the watch stand 4 and the storage rack 5 when folding and unfolding.

[0047] The watch stand 4 and the storage rack 5 are connected via a third rotating device 8. Figure 6 As shown, the third rotating device 8 includes a third limiting shaft 81, a limiting spring 82, a first limiting shaft sleeve 83 and a second limiting shaft sleeve 84, the first limiting shaft sleeve 83 is fixedly connected to the watch frame 4, and the second limiting shaft sleeve 84 is fixedly connected to the storage rack 5; the third limiting shaft 81 is passed through the first limiting shaft sleeve 83 and the second limiting shaft sleeve 84, and can rotate and move axially in the first limiting shaft sleeve 83 and the second limiting shaft sleeve 84; the limiting spring 82 is sleeved on the outside of the third limiting shaft 81, and one end is connected to the first limiting shaft sleeve 83 and the other end is connected to the second limiting shaft sleeve 84; the first limiting shaft sleeve 83 is protruding toward one end of the second limiting shaft sleeve 84 to form a plurality of first limiting teeth 831, and the second limiting shaft sleeve 84 is protruding toward one end of the first limiting shaft sleeve 83 to form a plurality of second limiting teeth 832, and the plurality of first limiting teeth 831 and the plurality of second limiting teeth 832 are complementary to each other.

[0048] When the storage rack 5 rotates, the fabric rack is first moved axially along the third limiting shaft 81, so that the first limiting tooth 831 on the first limiting shaft sleeve 83 and the second limiting tooth 832 on the second limiting shaft sleeve 84 are disengaged. Then, the storage rack 5 can be rotated to the desired folding gear, so that the first limiting tooth 831 on the first limiting shaft sleeve 83 and the second limiting tooth 832 on the second limiting shaft sleeve 84 are complementary and aligned at the desired folding gear. After that, the first limiting shaft sleeve 83 and the second limiting shaft sleeve 84 are reset under the elastic force of the limiting spring 82, so that the first limiting tooth 831 on the first limiting shaft sleeve 83 and the second limiting tooth 832 on the second limiting shaft sleeve 84 are re-engaged.

[0049] When the treadmill is used, the shelf 5 can be used to place terminal devices such as mobile phones and tablets.

[0050] In this embodiment, the pillars 2 and the handrails 3 are both covered with corresponding outer shells.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention rather than to limit them. Although the embodiments of the present invention are described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the embodiments of the present invention can still be modified or replaced by equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-stage folding treadmill, characterized in that: The utility model comprises a treadmill, two upright posts, two handrails, a watch rack and a storage rack. The treadmill is provided with a treadmill belt, and the watch rack is provided with an electronic watch. One end of the two upright posts is respectively connected to the two sides of the front end of the treadmill, and the other end is respectively connected to the two ends of the watch rack and the corresponding handrails. The two upright posts can be folded relative to the treadmill, and the two handrails can be folded relative to the corresponding upright posts. The storage rack is connected to one side of the watch rack and can be folded relative to the watch rack. The first control wheel is connected with the control wheel shaft by the help of the steering wheel, and the steering wheel is connected with the steering wheel to the control wheel shaft. The rotating component includes a first clamping member, a limiting member, an adjusting member, and a second clamping member which are sequentially passed through the outside of the first limiting shaft, the adjusting member is rotatably connected to the column, and the first clamping member and the second clamping member clamp the limiting member and the adjusting member; the limiting member is protruded on a surface facing the adjusting member to form a first limiting portion, a second limiting portion and a third limiting portion, the second limiting portion surrounds the rotation hole of the limiting member, and the first limiting portion and the third limiting portion are located outside both sides of the second limiting portion; the adjusting member is provided with a first limiting hole extending along its axial direction, and the thickness of the adjusting member gradually increases along its axial direction; the second limiting portion is passed through the first limiting hole, and the adjusting member is respectively embedded in the gap between the first limiting portion and the second limiting portion and the gap between the second limiting portion and the third limiting portion on both sides of its first limiting hole.

2. The multi-stage folding treadmill according to claim 1, characterized in that: After the treadmill and the columns are folded, the two columns are respectively located outside the two sides of the treadmill and parallel to the treadmill; after the treadmill and the columns are unfolded, the two columns intersect with the treadmill.

3. The multi-stage folding treadmill according to claim 1, characterized in that: An outer tube is sleeved on the column, and the rotating component also includes two clamping springs arranged on both sides of the limiter. The two clamping springs extend into the outer tube and are elastically clamped with the inner walls on both sides of the outer tube.

4. The multi-stage folding treadmill according to claim 1, characterized in that: After the columns and the armrests are folded, the two armrests are respectively located outside the corresponding columns and parallel to the corresponding columns; after the columns and the armrests are unfolded, the two armrests intersect with the corresponding columns.

5. The multi-stage folding treadmill according to claim 1 or 4, characterized in that: The armrest is connected to the column by a second rotating device, and the second rotating device includes a second limiting shaft, a second limiting pin, a second shaft sleeve, a second limiting disk, a first rotating disk, a second rotating disk and a limiting button, the second limiting disk is fixedly connected to the watch frame, the first rotating disk is rotatably connected to the column, and the second rotating disk is fixedly connected to the armrest; the second limiting shaft is passed through the second limiting disk, the first rotating disk and the second rotating disk, one end of the second limiting shaft is connected to the second limiting disk along the axial limit, and the other end is connected to the second rotating disk along the axial limit, and can be in the second limiting disk, the first rotating disk and the second rotating disk The second limit plate is located on a surface of the first rotating disk facing away from the second rotating disk, and two second limit holes are opened on a circumference with the second limit axis as the center; the second limit pin is passed through the first rotating disk and the second rotating disk, and can move axially in the first rotating disk and the second rotating disk, and switch to align with one of the two second limit holes as the first rotating disk and the second rotating disk rotate; the limit button is connected to the second limit pin to drive the second limit pin to move axially; the second shaft sleeve is sleeved on the outside of the second limit pin, and is located between the first rotating disk and the second rotating disk.

6. The multi-stage folding treadmill according to claim 5, characterized in that: The second rotating device also includes a support member arranged between the first rotating disk and the second rotating disk, the support member includes a first supporting portion, a second supporting portion and a third supporting portion connected in sequence, the first supporting portion and the second supporting portion are arranged at an angle, and the second supporting portion and the third supporting portion are arranged at an angle so that an opening is formed between the first supporting portion and the third supporting portion, and the diameter of the opening gradually becomes smaller in the direction of the second supporting portion; the second limiting axis is located in the opening of the support member.

7. The multi-stage folding treadmill according to claim 1, characterized in that: There are a plurality of folding positions between the watch frame and the storage rack, and each folding position corresponds to a folding angle.

8. The multi-stage folding treadmill according to claim 1 or 7, characterized in that: The watch frame and the storage rack are connected by a third rotating device, and the third rotating device includes a third limit shaft, a limit spring, a first limit shaft sleeve and a second limit shaft sleeve, the first limit shaft sleeve is fixedly connected to the watch frame, and the second limit shaft sleeve is fixedly connected to the storage rack; the third limit shaft is arranged in the first limit shaft sleeve and the second limit shaft sleeve, and can rotate and move axially in the first limit shaft sleeve and the second limit shaft sleeve; the limit spring is arranged outside the third limit shaft, and one end is connected to the first limit shaft sleeve and the other end is connected to the second limit shaft sleeve; the first limit shaft sleeve protrudes toward one end of the second limit shaft sleeve to form a plurality of first limit teeth, and the second limit shaft sleeve protrudes toward one end of the first limit shaft sleeve to form a plurality of second limit teeth, and the plurality of first limit teeth and the plurality of second limit teeth are complementary to each other.

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