Manually foldable treadmill and method of using the same

Abstract

The manual folding treadmill and the using method thereof are provided with a solution of miniaturization and simple manual folding storage and movement of the treadmill, so as to realize smooth folding process and labor saving, effectively reduce the volume and self weight through the modular design of the machine body, and achieve the design purpose of not needing on-site assembly and debugging for the first time. The manual folding treadmill comprises a first front running track assembly, a first rear running track assembly and an intermediate rotating plate assembly connected between the two assemblies. A running belt is closed-loop sleeved between the first front running track assembly and the first rear running track assembly. The first front running track assembly has a frame structure, a front running plate is additionally arranged on the top of the frame structure, and two groups of first gear wheels are symmetrically arranged on the same end of the frame structure.

Description

Technical Field

[0001] This invention proposes a novel manually folding treadmill and its manual folding method, belonging to the field of medical rehabilitation and fitness. Background Technology

[0002] With rising living standards and the promotion of healthy lifestyles, treadmills are increasingly appearing in commercial, home, and medical rehabilitation fields. Since running on a treadmill is a passive exercise—where the user's feet are moved by the running belt at a set speed and angle—current treadmills are relatively large and require considerable floor space. A common improvement is the adoption of a foldable design.

[0003] Currently, most treadmills use manual folding. Due to their considerable weight, manual folding is time-consuming and laborious, and they are difficult to move after folding, resulting in low consumer satisfaction and a low market share for these types of manually folding treadmills. Treadmills with motor-driven folding are less common in the market. Analysis of their performance reveals significant technical drawbacks. For example, the drive and transmission devices occupy a large amount of space, hindering miniaturization and lightweight design. This not only increases usable space but also makes the overall packaging box larger, inconvenient for transportation and reducing shipping costs. Furthermore, the initial unpacking and assembly requires professional on-site work, leading to a poor user experience and higher subsequent maintenance costs.

[0004] With the improvement of living standards and consumption levels, the current market urgently needs a folding treadmill that embodies miniaturization and convenience, from the perspective of ease of use and comfortable experience.

[0005] In view of the above, this patent application is hereby filed. Summary of the Invention

[0006] The manual folding treadmill and its usage method described in this application address the problems existing in the prior art by proposing a solution for miniaturizing the treadmill and making it easy to manually fold, store, and move. The aim is to improve the smoothness and effortlessness of the folding process and effectively reduce the size and weight through modular design of the machine body, so that no on-site assembly and debugging are required for the first use.

[0007] To achieve the above-mentioned objective, the manually folding treadmill includes a first front running platform assembly and a first rear running platform assembly, as well as an intermediate rotating plate assembly connecting the two.

[0008] A running belt is provided in a closed loop between the first front running platform assembly and the first rear running platform assembly;

[0009] The first front running platform assembly has a frame structure, with a front running plate provided on the top of the frame structure, and two sets of first gears symmetrically arranged on the same end of the frame structure.

[0010] The intermediate rotating plate assembly consists of two sets of end plates and a curved plate connected between the end plates. An intermediate running plate is connected to the curved plate. Two sets of third gears are symmetrically mounted on the side of each set of end plates, and a third rotating shaft is horizontally mounted through a third bearing. A set of second gears is fitted at both ends of the third rotating shaft, and each set of second gears meshes with the adjacent third gear.

[0011] The two ends of the second and fourth rotating shafts are respectively mounted between the two end plates via bearings. The first front running platform assembly and the first rear running platform assembly are connected in series by the middle rotating plate assembly to form a three-section treadmill structure.

[0012] A rear running plate is fixedly connected to the top of the first rear running platform assembly, and two sets of fourth gears are symmetrically arranged on the same side of the first rear running platform assembly and adjacent to the intermediate turn plate assembly.

[0013] On both sides of the intermediate rotating plate assembly, the first gear, the second gear, the third gear and the fourth gear mesh and drive together in sequence.

[0014] Furthermore, a first locking handle with an integral T-shaped structure is connected to one side of the intermediate rotating plate assembly. Its extension is provided with a vertically arranged spring hole, a horizontally arranged long pin hole, and a set of concave teeth. The first locking handle is hinged to the second U-shaped plate through the long pin. The extension of the first locking handle can swing vertically around the long pin. The spring is vertically fitted in the spring hole, and the bottom of the spring is connected to the end plate.

[0015] Furthermore, the intermediate rotating plate assembly has a shoulder screw fixedly connected to the side of each set of end plates, and a third gear is fitted on each set of shoulder screws and can rotate around its fixed axis.

[0016] Furthermore, the intermediate rotating plate assembly has a number of bearing sleeves symmetrically fixed on the two sets of end plates, and a third bearing is fitted on each bearing sleeve, with the two ends of the third rotating shaft respectively fitted onto the third bearing.

[0017] Furthermore, the first front running platform assembly has a first rotating shaft horizontally sleeved in its frame structure. The first rotating shaft rotates around the pivot points at both ends. A handle is fixedly connected to the end of the first rotating shaft. Two sets of eccentric sleeves are fixedly sleeved on the outer diameter of the first rotating shaft. Each set of eccentric sleeves is respectively arranged opposite to the front roller located at the end of the frame structure. As the first rotating shaft rotates, the eccentric sleeves and the front rollers are in clearance fit or interference fit.

[0018] Based on the aforementioned manually folding treadmill, this application proposes the following method of use, including the following usage stages.

[0019] 1) Normal use

[0020] When the manual folding treadmill is in a flat position, the concave teeth of the first locking handle mesh with the third gear under the elastic adjustment of the spring, and the third gear cannot rotate; the first gear, second gear, third gear and fourth gear on both sides of the middle rotating plate assembly, which are meshed in sequence, are in an interlocked and stationary state.

[0021] The first front running platform assembly, the middle rotating plate assembly, and the first rear running platform assembly are connected to form a three-section structure in a horizontal state, allowing fitness enthusiasts to run and exercise normally on the running belt.

[0022] 2) Folding stage

[0023] Pull the first locking handle upwards, and the concave tooth disengages from the third gear. The third gear can rotate around the shoulder screw on the side of the end plate, and the first, second, third, and fourth gears are disengaged from the interlocking state.

[0024] The first front running platform assembly and the first rear running platform assembly are pushed from both sides of the middle rotating plate assembly. While the first front running platform assembly and the first rear running platform assembly swing as a whole, the first gear and the fourth gear rotate in opposite directions. The middle rotating plate assembly rises parallel to the ground until the first front running platform assembly and the first rear running platform assembly are parallel to each other on both sides of the middle rotating plate assembly.

[0025] Then, release the first locking handle. Under the elastic reset action of the spring, the concave tooth meshes with the third gear again. The first gear, second gear, third gear and fourth gear return to the interlocked state. The first front running platform assembly, the middle turntable assembly and the rear running platform assembly are mutually limited and stably in the folded state. The folding stage is completed.

[0026] 3) Stretching stage

[0027] Pull the first locking handle upwards, and the concave tooth disengages from the third gear. The third gear can rotate around the shoulder screw on the side of the end plate, and the first, second, third, and fourth gears are disengaged from the interlocking state.

[0028] Pull the first front running platform assembly and the first rear running platform assembly from both sides of the middle rotating plate assembly. The first front running platform assembly and the first rear running platform assembly swing outward as a whole to drive the first gear and the fourth gear to rotate in opposite directions. The middle rotating plate assembly descends vertically and always remains parallel to the ground.

[0029] When the first front running platform assembly and the first rear running platform assembly extend to a horizontal position on both sides of the intermediate turntable assembly, the first locking handle is released. Under the elastic reset action of the spring, the concave teeth and the third gear mesh again, and the first gear, the second gear, the third gear and the fourth gear return to the interlocked state. The first front running platform assembly, the intermediate turntable assembly and the rear running platform assembly are mutually limited and stably in the extended state, and the extension phase is completed.

[0030] Furthermore, the distance between the eccentric sleeve and the front roller is adjusted by rotating the first shaft with the handle; when the eccentric sleeve and the front roller are pressed against each other to form an interference fit, the front roller cannot rotate while in contact with the ground to form a brake and keep the entire manual folding treadmill stationary; when the eccentric sleeve rotates and forms a clearance fit with the front roller, the front roller can rotate on a fixed axis while in contact with the ground.

[0031] Another preferred manual folding treadmill includes a second front running platform assembly and a second rear running platform assembly, a front support assembly connecting to and supporting the second front running platform assembly, and a running belt being closedly fitted between the second front running platform assembly and the second rear running platform assembly.

[0032] The front support assembly consists of a front support base plate and a front roller support fixedly connected. A sixth bearing is sleeved on both sides of the front support base plate. The front roller is mounted on the front roller support via a third pin and can rotate around the pin.

[0033] The second front running platform assembly has a frame structure, with two sets of front rotating plates symmetrically fixedly connected to both ends of the frame structure; the fifth rotating shaft at the front end of the frame passes through the sixth bearing to achieve a rotatable connection with the front support assembly; the two sets of front rotating plates at the other end are laterally connected through the sixth rotating shaft, and the first slot and the second slot are symmetrically provided on the front rotating plates and on both sides of the sixth rotating shaft.

[0034] The second rear running platform assembly has two sets of symmetrically arranged rear rotating plates fixedly connected to one side adjacent to the second front running platform assembly. Two sets of seventh bearings are respectively symmetrically sleeved on the two sets of rear rotating plates. A set of guide plates is fixedly connected to each set of rear rotating plates. Horizontally distributed slots and first holes are provided on the guide plates.

[0035] The locking block is fitted into the slot and can move horizontally. The locking block has a semi-circular groove and a second hole. A second spring is connected between the second hole and the slot. Under the elastic action of the second spring, the locking block is connected to an eccentric shaft assembly between the second front running platform assembly and the second rear running platform assembly. The eccentric shaft assembly includes a long rod, with two sets of connecting blocks and an eccentric shaft symmetrically connected to both ends of the long rod. A second locking handle is fixedly connected to the end of the eccentric shaft. One end of the eccentric shaft is fitted into the first hole, and the outer diameter of the long rod is tangent to the semi-circular groove.

[0036] In summary, the manually folding treadmill and its method of use described in this application have the following advantages:

[0037] 1. The treadmill adopts a segmented modular design, which not only simplifies the installation and connection structure of the machine, but also facilitates the use of miniaturized drive components to achieve folding transmission of the front and rear running platform components. This helps to reduce the size of the machine body, reduce the size of the outer packaging, and reduce transportation costs.

[0038] 2. This application proposes a novel treadmill body structure, which can effectively reduce the difficulty of manufacturing process. The whole machine can be directly delivered to the use site after leaving the factory. No secondary installation and debugging are required on site during the first use, and the subsequent maintenance and repair costs are also lower.

[0039] 3. The manual folding method proposed in this application is highly convenient. After folding, it is easy to move and store, which is convenient to use and occupies little space, making it easy to meet the needs of different types of consumers.

[0040] 4. This application produces low noise and vibration energy during use, and does not have a significant impact on the surrounding environment. Attached Figure Description

[0041] Figure 1 This is an isometric side view of the manually folding treadmill described in Embodiment 1;

[0042] Figure 1-1 yes Figure 1 Enlarged schematic diagram of section B in the middle;

[0043] Figure 2 Is it like this? Figure 1 The side view of the structure shown folded to the middle position;

[0044] Figure 3 Is it like this? Figure 1 The isometric side view of the structure shown folded to the middle position at the bottom;

[0045] Figure 3-1 yes Figure 3 Enlarged diagram of section C;

[0046] Figure 4 Is it like this? Figure 1 The isometric side view of the structure shown folded to a vertical position;

[0047] Figure 4-1 yes Figure 4 Enlarged schematic diagram of section D in the middle;

[0048] Figure 5 This is an isometric side view of the first front runway assembly;

[0049] Figure 5-1 yes Figure 5 Enlarged schematic diagram of section E in the middle;

[0050] Figure 5-2 yes Figure 5 Enlarged schematic diagram of section F in the middle;

[0051] Figure 6 This is the bottom isometric side view of the first front runway assembly;

[0052] Figure 6-1 yes Figure 6 Enlarged schematic diagram of section G in the middle;

[0053] Figure 7 This is an isometric side view of the intermediate turntable assembly;

[0054] Figure 7-1 yes Figure 7 Enlarged schematic diagram of the middle H section;

[0055] Figure 8 This is an isometric side view of the first rear runway assembly;

[0056] Figure 8-1 yes Figure 8 Enlarged schematic diagram of the middle J section;

[0057] Figure 8-2 yes Figure 8 Enlarged diagram of section K in the middle;

[0058] Figure 9 This is an isometric side view of the manually folding treadmill described in Embodiment 2;

[0059] Figure 9-1 yes Figure 9 Enlarged schematic diagram of the middle L section;

[0060] Figure 9-2 yes Figure 9 Enlarged schematic diagram of the middle M section;

[0061] Figure 10 This is an isometric side view of the front bracket assembly;

[0062] Figure 11 This is an isometric side view of the second front runway assembly;

[0063] Figure 11-1 yes Figure 11 Enlarged schematic diagram of part N in the middle;

[0064] Figure 12 This is an isometric side view of the second rear runway assembly;

[0065] Figure 12-1 yes Figure 12 Enlarged schematic diagram of the middle O section;

[0066] Figure 13 This is an isometric side view of the eccentric shaft assembly;

[0067] Figure 13-1 yes Figure 13 Enlarged schematic diagram of the middle P section;

[0068] Figure 13-2 yes Figure 13 Enlarged schematic diagram of the middle Q section;

[0069] Figure 14 Is it like this? Figure 9 Bottom isometric side view of the structure shown;

[0070] Figure 14-1 yes Figure 14 Enlarged schematic diagram of the middle R section. Detailed Implementation

[0071] The present invention will now be described in further detail with reference to the accompanying drawings.

[0072] Example 1, as Figures 1 to 8-2 As shown, a new type of manually folding treadmill mainly includes the following components:

[0073] The first front running platform assembly 100 and the first rear running platform assembly 300 together form the running support and connection part;

[0074] The intermediate turntable assembly 200 is used to connect the first front running platform assembly 100 and the first rear running platform assembly 300, and maintains a horizontal state during the treadmill's folding and horizontal extension.

[0075] The treadmill belt 500 is fitted in a closed loop between the first front treadmill assembly 100 and the first rear treadmill assembly 300 to support and propel the exerciser forward on it.

[0076] The first front running platform assembly 100 is a rectangular frame structure formed by splicing together a first rod 101, a second rod 102, a third rod 103, and a fourth rod 104. Two sets of auxiliary support plates 105 and two sets of front roller brackets 107 are symmetrically connected to one end of the frame structure, and two sets of first gear mounting plates 106 are symmetrically connected to the other end of the frame structure. A front running plate 111 is provided on the top of the frame structure, and an array of buffer pads 109 is provided at the bottom of the frame structure.

[0077] The auxiliary support plate 105 serves to provide vertical support and stability when the treadmill is folded down.

[0078] The two ends of the front roller 134 are axially connected to the front roller bracket 107 through the first pin 133. The front roller 134 can rotate around the first pin 133. When the front roller 134 contacts the ground, it can support the above frame structure together with the buffer pad 109, thus playing the role of bearing and shock absorption for the entire treadmill.

[0079] A running motor mounting plate 108 and a first U-shaped plate 110 are connected to one side of the aforementioned frame structure.

[0080] A first gear 150 is mounted on the first gear mounting plate 106 via a second bearing 151. At the same end of the above frame structure, two sets of first gears 150 are arranged opposite each other.

[0081] The two ends of the first rotating shaft 130 are respectively connected to the first rod 101 and the second rod 102. The first rotating shaft 130 rotates around the two ends of the shaft connection point as the fulcrum.

[0082] A handle 131 is fixedly connected to the end of the first rotating shaft 130. Two sets of eccentric sleeves 135 are fixedly sleeved on the outer diameter of the first rotating shaft 130. Each set of eccentric sleeves 135 is respectively arranged opposite to a set of front rollers 134. As the first rotating shaft 130 rotates, the eccentric sleeves 135 and the front rollers 134 are either clearance-fitted or interference-fitted. When the two are clearance-fitted, the front rollers 134 are not subjected to friction and compression from the eccentric sleeves 135 and maintain a free fixed-axis rotation state. When the two are interference-fitted, the front rollers 134 are subjected to friction and compression from the eccentric sleeves 135 and cannot rotate.

[0083] The two ends of the front running roller core shaft 120 are respectively mounted on the above-mentioned frame structure. One end is fixedly connected to the second rod 102, and the other end is radially fixedly connected to the first U-shaped plate 110 through the first bolt 124. The front running roller 123 is sleeved on the outer diameter of the front running roller core shaft 120 through the first bearing 121. The front running roller 123 rotates around the front running roller core shaft 120 axially. The large pulley 125 is fixedly sleeved on the outside of the front running roller 123.

[0084] A running motor 128 is installed on the running motor mounting plate 108. The output end of the running motor 128 is connected to a small pulley 127. A belt 126 is looped between the small pulley 127 and the large pulley 125. Driven by the running motor 128, the small pulley 127 and the belt 126 drive the large pulley 125 to rotate on a fixed axis, thereby driving the front running roller 123 to rotate accordingly.

[0085] The intermediate plate assembly 200 is composed of two sets of oppositely arranged end plates 201 and a curved plate 202 connected between the two end plates 201. An intermediate running plate 204 is connected to the curved plate 202.

[0086] Two sets of shoulder screws 210 are symmetrically fixedly connected to the side of each set of end plates 201. A set of third gears 211 is sleeved on each set of shoulder screws 210 and can rotate around its fixed axis.

[0087] Two sets of bearing sleeves 203 are symmetrically fixed on the two sets of end plates 201 respectively. A set of third bearings 206 is sleeved on each bearing sleeve 203. The two ends of the third rotating shaft 208 are respectively sleeved on the third bearings 206.

[0088] A set of second gears 212 are respectively fitted at both ends of the third rotating shaft 208, and each set of second gears 212 meshes with the adjacent third gear 211.

[0089] The aforementioned third rotating shaft 208 serves as a bridge connecting and transmitting power across both sides of the intermediate rotating plate assembly 200. The second gears 212 at both ends of the shaft enable the synchronous operation of the rotation or locking of the transmission gear assemblies on both sides.

[0090] The second rotating shaft 207, the fourth rotating shaft 205, and the running belt limiting rod 209 are respectively fitted between the two end plates 201;

[0091] The two ends of the second rotating shaft 207 are respectively sleeved on the second bearing 151, and the two ends of the fourth rotating shaft 205 are respectively sleeved on the fourth bearing 313. Thus, the first front running platform assembly 100 and the first rear running platform assembly 300 are connected in series through the intermediate rotating plate assembly 200 to form the three-section treadmill structure of this embodiment.

[0092] A first locking handle 213 with an integral T-shaped structure is connected to one side of the intermediate rotating plate assembly 200. Its extension is provided with a vertically arranged spring hole 2131, a horizontally arranged long pin hole 2132 and a set of concave teeth 2133.

[0093] Specifically, a second U-shaped plate 2135 is fixedly connected to one end plate 201. A first locking handle 213 is hinged to the second U-shaped plate 2135 via a long pin 214. The extension of the first locking handle 213 can rotate vertically around the long pin 214. A spring 215 is vertically fitted in a spring hole 2131, and the bottom of the spring 215 is connected to the second U-shaped plate 2135.

[0094] Without external force, the concave tooth 2133 meshes with the third gear 211, the third gear 211 cannot rotate, and the spring 215 is in a free state; when an external force is applied and the first locking handle 213 is pulled vertically upward, the extension of the first locking handle 213 swings vertically around the long pin 214, the concave tooth 2133 disengages from the third gear 211, and the third gear 211 can rotate around the shoulder screw 210.

[0095] The first rear running platform assembly 300 is composed of two sets of symmetrically arranged fifth rods 301 and sixth rods 302 spliced ​​together. After the fifth rods 301 and sixth rods 302 are spliced ​​together, the rear running plate 303 is fixedly connected at the top and an array of buffer pads 109 is fixedly connected at the bottom.

[0096] A third U-shaped plate 304 is fixedly connected to the same side of the two sets of fifth rods 301 respectively. The rear roller 307 is mounted on the third U-shaped plate 304 through the second pin 306 and can rotate around its fixed axis. A second gear mounting plate 305 is fixedly connected to the other side of the two sets of fifth rods 301 respectively. The fourth gear 312 is mounted on the second gear mounting plate 305 through the fourth bearing 313.

[0097] The two ends of the rear running roller core shaft 311 are radially fixed between the two sides of the third U-shaped plates 304 by the second bolts 308 respectively. The rear running roller 309 is sleeved on the rear running roller core shaft 311 by the fifth bearing 310 and can rotate around its fixed axis.

[0098] On both sides of the intermediate rotating plate assembly 200, there are a first gear 150, a second gear 212, a third gear 211 and a fourth gear 312 that mesh and drive in sequence.

[0099] The running belt 500 is fitted in a closed loop between the front running roller 123 and the rear running roller 309.

[0100] Based on the structural features of the manually folding treadmill described above, this embodiment proposes the following method of using the manually folding treadmill:

[0101] 1) Normal use

[0102] exist Figure 1 In the middle, the manual folding treadmill is in a flat position. Under the elastic adjustment of the spring 215, the concave teeth 2133 of the first locking handle 213 mesh with the third gear 211, and the third gear 211 cannot rotate. The first gear 150, the second gear 212, the third gear 211 and the fourth gear 312 on both sides of the middle rotating plate assembly 200, which are sequentially meshed, are in an interlocked static state.

[0103] During the closed-loop operation of the running belt 500 driven by the running motor 128 between the front running roller 123 and the rear running roller 309, the A-side of the curved plate 202 contacts the end face of the front running plate 111, and the other end face opposite to the A-side contacts the end face of the rear running plate 303. Therefore, no matter how the treadmill vibrates, or even if it is subjected to the tension of the running belt 500, the three-section structure formed by the connection of the first front running platform assembly 100, the intermediate rotating plate assembly 200 and the first rear running platform assembly 300 can always remain flat and stable.

[0104] Fitness enthusiasts are exercising normally while running on the 500-meter treadmill.

[0105] Furthermore, at this stage, by rotating the first shaft 130 with the handle 131 to adjust the eccentric sleeve 135 and the front roller 134 to form an interference fit, the front roller 134 cannot rotate while in contact with the ground, thus forming a brake and keeping the entire manual folding treadmill stationary. At this time, the cushioning pad 109 and the rear roller 307 are both in contact with the ground, and the treadmill will not shift or shake when the exerciser is running.

[0106] 2) Folding stage

[0107] Pull the first locking handle 213 upwards, the concave tooth 2133 disengages from the third gear 211, and the third gear 211 can rotate around the shoulder screw 210 on the side of the end plate 201, thus disengaging the interlocking state between the first gear 150, the second gear 212, the third gear 211, and the fourth gear 312.

[0108] The first front running platform assembly 100 and the first rear running platform assembly 300 are pushed from both sides of the intermediate rotating plate assembly 200. While the first front running platform assembly 100 and the first rear running platform assembly 300 rotate as a whole, the first gear 150 and the fourth gear 312 are driven to rotate in opposite directions. The intermediate rotating plate assembly 200 rises parallel to the ground until the first front running platform assembly 100 and the first rear running platform assembly 300 are parallel on both sides of the intermediate rotating plate assembly 200.

[0109] At this time, the first locking handle 213 is released. Under the elastic reset action of the spring 215, the concave tooth 2133 engages with the third gear 211 again. The first gear 150, the second gear 212, the third gear 211 and the fourth gear 312 are interlocked again. The first front running platform assembly 100, the middle rotating plate assembly 200 and the rear running platform assembly 300 are mutually limited and stably in the folded state. The folding stage is completed.

[0110] Furthermore, at this stage, by rotating the first shaft 130 through the handle 131 to adjust the rotation of the eccentric sleeve 135 and form a clearance fit with the front roller 134, the front roller 134 can rotate on a fixed axis while in contact with the ground, so that the folded treadmill can be easily moved and stored elsewhere.

[0111] 3) Stretching stage

[0112] Pull the first locking handle 213 upwards, the concave tooth 2133 disengages from the third gear 211, and the third gear 211 can rotate around the shoulder screw 210 on the side of the end plate 201, thus disengaging the interlocking state between the first gear 150, the second gear 212, the third gear 211, and the fourth gear 312.

[0113] Pull the first front running platform assembly 100 and the first rear running platform assembly 300 from both sides of the intermediate rotating plate assembly 200 respectively. The first front running platform assembly 100 and the first rear running platform assembly 300 swing outward as a whole to drive the first gear 150 and the fourth gear 312 to rotate in opposite directions. The intermediate rotating plate assembly 200 descends vertically and always remains parallel to the ground.

[0114] When the first front running platform assembly 100 and the first rear running platform assembly 300 are extended to a horizontal position on both sides of the intermediate rotating plate assembly 200, the first locking handle 213 is released. Under the elastic reset action of the spring 215, the concave tooth 2133 and the third gear 211 mesh again. The first gear 150, the second gear 212, the third gear 211 and the fourth gear 312 return to the interlocked state. The first front running platform assembly 100, the intermediate rotating plate assembly 200 and the rear running platform assembly 300 are mutually limited and stably in the extended state. The extension stage is completed.

[0115] Furthermore, when the first front running platform assembly 100 and the first rear running platform assembly 300 extend and approach the ground, the running belt 500 forms a horizontal reverse pull on the whole machine to lay flat and reset; at this time, due to being close to the ground, the first front running platform assembly 100 and the first rear running platform assembly 300, under the action of their own gravity, have the tendency to extend to both sides of the middle rotating plate assembly 200 and continue to complete the extension action.

[0116] Finally, the A-side of the curved plate 202 of the intermediate turn plate assembly 200 is attached to the end face of the front running plate 111 of the first front running plate assembly 100, and the other side of the curved plate 202 (opposite to the A-side) is attached to the end of the rear running plate 303 of the first rear running plate assembly 300. Thus, the first front running plate assembly 100, the intermediate turn plate assembly 200 and the first rear running plate assembly 300 restore the horizontally connected three-section structure to keep the treadmill flat and stable.

[0117] Example 2, as Figures 9 to 14-1 As shown, the manually folding treadmill mainly includes the following components:

[0118] The second front running platform assembly 700 and the second rear running platform assembly 800 together form the running support and connection part;

[0119] The front support assembly 600 is used to connect to and support the second front running platform assembly 700 (i.e., the weight of the front of the treadmill) and serves as the base for overall support of the treadmill when folded.

[0120] The treadmill belt is fitted in a closed loop between the second front treadmill assembly 700 and the second rear treadmill assembly 800 to support and propel the exerciser forward on it.

[0121] The front support assembly 600 is composed of a front support base plate 601 and a front roller support 602 fixedly connected. A sixth bearing 605 is sleeved on both sides of the front support base plate 601. The front roller 603 is axially mounted on the front roller support 602 through a third pin 604 and can rotate around the pin 604.

[0122] During normal use of the treadmill, the front support base plate 601 is in contact with the ground while the front roller 603 is not. During the folding and storage of the second front running platform assembly 700 and the second rear running platform assembly 800, the second front running platform assembly 700 swings, the front roller 603 does not contact the ground while the front support base plate 601 contacts the ground. After folding and storage, the entire treadmill can be moved to another location by tilting the front support base plate 601 and causing the front roller 603 to roll. The front support base plate 601 can extend upwards to form the handrail of the treadmill.

[0123] The second front running platform assembly 700 is a rectangular frame structure assembled from a first rod, a second rod, a third rod, and a fourth rod (not shown in the figure). Two sets of front rotating plates 712 are symmetrically fixed to both ends of the frame structure.

[0124] The difference from Example 1 is that, in Figure 9 In the above-mentioned frame structure, one end is rotatably connected to the front support assembly 600 by passing a fifth rotating shaft 710 through a sixth bearing 605;

[0125] The two sets of front rotating plates 712 on the other side are laterally connected by the sixth rotating shaft 711. The first slot 7121 and the second slot 7122 are symmetrically provided on the front rotating plate 712 and on both sides of the sixth rotating shaft 711. The sixth rotating shaft 711 is located slightly below the center line of the running belt 500.

[0126] A running motor and a front running roller core shaft are provided at the far end of the aforementioned frame structure. A front running roller is sleeved on the outer diameter of the front running roller core shaft via bearings. Driven by the running motor, the front running roller rotates axially around the front running roller core shaft.

[0127] The second rear running platform assembly 800 is composed of two sets of symmetrically arranged fifth and sixth rods (not shown in the figure). After the fifth and sixth rods are spliced ​​together, the rear running plate is fixedly connected at the top and an array of buffer pads is fixedly connected at the bottom.

[0128] A rear running roller mandrel is installed on the far end of the fifth rod in both sets. The rear running roller is sleeved on the rear running roller mandrel through a bearing and can rotate around its fixed axis.

[0129] The running belt is fitted in a closed loop between the front running roller and the rear running roller;

[0130] The difference from Embodiment 1 is that two sets of symmetrically arranged rear rotating plates 810 are fixedly connected to the proximal ends of the two sets of fifth rods, and two sets of seventh bearings 811 are symmetrically sleeved on the two sets of rear rotating plates 810 respectively. A set of guide plates 812 are fixedly connected to each set of rear rotating plates 810, and horizontally distributed slots 8121 and first holes 8122 are provided on the guide plates 812.

[0131] The six pivot 711 is fitted into the seventh bearing 811 at both ends, forming an overall rotational relationship between the second front runway assembly 700 and the second rear runway assembly 800, i.e., a two-stage folding method.

[0132] The locking block 814 is fitted in the slot 8121 and can move horizontally. The locking block 814 is provided with a semi-circular slot 8141 and a second hole 8142. The second spring 813 is connected between the second hole 8142 and the slot 8121. Under the elastic action of the second spring 813, the locking block 814 is always on one side of the slot 8121.

[0133] An eccentric shaft assembly 750 is connected between the second front running platform assembly 700 and the second rear running platform assembly 800. The eccentric shaft assembly 750 includes a long rod 751, with two sets of connecting blocks 752 and an eccentric shaft 753 symmetrically connected to both ends of the long rod 751. A second locking handle 754 is fixedly connected to the end of the eccentric shaft 753. One end of the eccentric shaft 753 is sleeved in the first hole 8122, and the outer diameter of the long rod 751 is tangent to the semi-circular groove 8141.

[0134] When the second locking handle 754 is pulled, the eccentric shaft 753 rotates relative to the first hole 8122, and the long rod 751 presses the locking block 814 through the semi-circular groove 8141, moving it to the opposite side. The locking block 814 disengages from the first slot 7121 and the second slot 7122, thereby realizing that the second front running platform assembly 700 and the second rear running platform assembly 800 are in a free state relative to each other. The second front running platform assembly 700 and the second rear running platform assembly 800 can be folded and stored or extended and opened by external force. The folding and extending process is the same as the solution provided in Embodiment 1.

[0135] Specifically, when the locking block 814 is inserted into the first slot 7121, the second front running board assembly 700 and the second rear running board assembly 800 extend to a horizontal position and are locked, allowing the exerciser to run and exercise normally on the running belt 500.

[0136] When the locking block 814 is inserted into the second slot 7122, the second front running board assembly 700 and the second rear running board assembly 800 are folded into a parallel state and locked, allowing the treadmill to be moved to another location for storage.

[0137] As described above, similar technical solutions can be derived from the solutions presented in conjunction with the accompanying drawings and embodiments. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this invention, without departing from the scope of the technical solutions of this invention, shall still fall within the scope of the technical solutions of this invention.

Claims

1. A manually folding treadmill, characterized in that: Including the first front treadmill assembly and the first rear treadmill assembly, as well as connecting The intermediate transfer plate assembly connecting the two; A running belt is provided in a closed loop between the first front running platform assembly and the first rear running platform assembly; The first front running platform assembly has a frame structure, with a front running plate provided on the top of the frame structure, and two sets of first gears symmetrically arranged on the same end of the frame structure. The intermediate rotating plate assembly consists of two sets of end plates and a curved plate connected between the end plates. An intermediate running plate is connected to the curved plate. Two sets of third gears are symmetrically mounted on the side of each set of end plates, and a third rotating shaft is horizontally mounted through a third bearing. A set of second gears is fitted at both ends of the third rotating shaft, and each set of second gears meshes with the adjacent third gear. The two ends of the second and fourth rotating shafts are respectively mounted between the two end plates via bearings. The first front running platform assembly and the first rear running platform assembly are connected in series by the middle rotating plate assembly to form a three-section treadmill structure. A rear running plate is fixedly connected to the top of the first rear running platform assembly, and two sets of fourth gears are symmetrically arranged on the same side of the first rear running platform assembly and adjacent to the intermediate turn plate assembly. On both sides of the intermediate rotating plate assembly, the first gear, the second gear, the third gear and the fourth gear mesh and are connected in sequence for transmission. A first locking handle with an integral T-shaped structure is connected to one side of the intermediate rotating plate assembly. Its extension is provided with a vertically arranged spring hole, a horizontally arranged long pin hole and a set of concave teeth. The first locking handle is hinged to the second U-shaped plate through the long pin. The extension of the first locking handle can swing vertically around the long pin. The spring is vertically sleeved in the spring hole, and the bottom of the spring is connected to the end plate.

2. The manually folding treadmill according to claim 1, characterized in that: The intermediate rotating plate assembly has a shoulder screw fixedly connected to the side of each set of end plates, and a third gear is fitted on each set of shoulder screws and can rotate around its fixed axis.

3. The manually folding treadmill according to claim 2, characterized in that: The intermediate rotating plate assembly has a number of bearing sleeves symmetrically fixed on two sets of end plates, and a third bearing is fitted on each bearing sleeve. The two ends of the third rotating shaft are respectively fitted onto the third bearing.

4. The manually folding treadmill according to claim 3, characterized in that: The first front running platform assembly has a first rotating shaft horizontally inserted in its frame structure. The first rotating shaft rotates around the pivot points at both ends as fulcrums. A handle is fixedly connected to the end of the first rotating shaft. Two sets of eccentric sleeves are fixedly fitted on the outer diameter of the first rotating shaft. Each set of eccentric sleeves is respectively set opposite to the front roller located at the end of the frame structure. As the first rotating shaft rotates, the eccentric sleeves and the front rollers are in clearance fit or interference fit.

5. The method of using the manually folding treadmill as described in claim 4, characterized in that: Including the following usage stages, Normal use When the manual folding treadmill is in a flat position, the concave teeth of the first locking handle mesh with the third gear under the elastic adjustment of the spring, and the third gear cannot rotate; the first gear, second gear, third gear and fourth gear on both sides of the middle rotating plate assembly, which are meshed in sequence, are in an interlocked and stationary state. The first front running platform assembly, the middle rotating plate assembly, and the first rear running platform assembly are connected to form a three-section structure in a horizontal state, allowing fitness enthusiasts to run and exercise normally on the running belt. 2) Folding stage Pull the first locking handle upwards, and the concave tooth disengages from the third gear. The third gear can rotate around the shoulder screw on the side of the end plate, and the first, second, third, and fourth gears are disengaged from the interlocking state. The first front running platform assembly and the first rear running platform assembly are pushed from both sides of the middle rotating plate assembly. While the first front running platform assembly and the first rear running platform assembly swing as a whole, the first gear and the fourth gear rotate in opposite directions. The middle rotating plate assembly rises parallel to the ground until the first front running platform assembly and the first rear running platform assembly are parallel to each other on both sides of the middle rotating plate assembly. Then, release the first locking handle. Under the elastic reset action of the spring, the concave tooth meshes with the third gear again. The first gear, second gear, third gear and fourth gear return to the interlocked state. The first front running platform assembly, the middle turntable assembly and the rear running platform assembly are mutually limited and stably in the folded state. The folding stage is completed. 3) Stretching phase Pull the first locking handle upwards, and the concave tooth disengages from the third gear. The third gear can rotate around the shoulder screw on the side of the end plate, and the first, second, third, and fourth gears are disengaged from the interlocking state. Pull the first front running platform assembly and the first rear running platform assembly from both sides of the middle rotating plate assembly. The first front running platform assembly and the first rear running platform assembly swing outward as a whole to drive the first gear and the fourth gear to rotate in opposite directions. The middle rotating plate assembly descends vertically and always remains parallel to the ground. When the first front running platform assembly and the first rear running platform assembly extend to a horizontal position on both sides of the intermediate turntable assembly, the first locking handle is released. Under the elastic reset action of the spring, the concave teeth and the third gear mesh again, and the first gear, the second gear, the third gear and the fourth gear return to the interlocked state. The first front running platform assembly, the intermediate turntable assembly and the rear running platform assembly are mutually limited and stably in the extended state, and the extension phase is completed.

6. The method of using the manually folding treadmill according to claim 5, characterized in that: The distance between the eccentric sleeve and the front roller is adjusted by rotating the first shaft by hand. When the eccentric sleeve and the front roller press against each other to form an interference fit, the front roller cannot rotate while in contact with the ground to form a brake and keep the entire manual folding treadmill stationary. When the eccentric sleeve rotates and forms a clearance fit with the front roller, the front roller can rotate on a fixed axis while in contact with the ground.

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