Running machine

Abstract

The utility model discloses a treadmill, and belongs to the technical field of treadmills. According to the treadmill, the stand columns and the treadmill table are movably connected through the transversely-arranged rotary supporting assemblies, so that the stand columns can be switched between the unfolded state and the folded state, and transverse limiting of the stand columns can be achieved. By longitudinally arranging the unfolding locking assembly, the stand column can make contact with the stand column limiting piece after being unfolded, the limiting locking part on the stand column is fixedly connected with the stand column limiting piece through the locking piece, longitudinal locking force is provided for the stand column, the stability of the stand column in the unfolded use state is effectively guaranteed, the stand column is not prone to shaking, and the service life of the stand column is prolonged. Therefore, the use experience of the user is improved. In addition, the unfolding and locking assembly is simple in structure, and the manufacturing cost of the treadmill is saved.

Description

Technical Field

[0001] This application relates to the field of treadmill technology, and particularly to a treadmill. Background Technology

[0002] Nowadays, people are paying more and more attention to their health, and exercising has become something that people participate in at all stages of life, especially aerobic running. At the same time, with people's busy work schedules, they have less time to participate in outdoor sports. As a result, home treadmills have become popular and are favored by a wide range of users (exercisers).

[0003] However, in order to facilitate transportation and storage, existing treadmills are designed with foldable uprights, but this results in the uprights being unstable and prone to wobbling when unfolded for use. Utility Model Content

[0004] This application provides a treadmill. It solves the problem in existing treadmills where the uprights are easily unstable and wobbly when in use. The technical solution is as follows:

[0005] On one hand, a treadmill is provided, the treadmill comprising: a running platform, a rotating support assembly, an upright column, and an unfolding locking assembly;

[0006] The rotating support assembly is installed on the side of the running platform, and the rotating shaft in the rotating support assembly is perpendicular to the side of the running platform.

[0007] The column is sleeved on the rotating shaft in the rotating support assembly and rotates relative to the rotating shaft;

[0008] The unfolding locking assembly includes: a column limiting member, a limiting locking part, and a locking member. The column limiting member is fixed to the side of the running platform and is located on the side of the rotating support assembly away from the running platform surface. The limiting locking part is fixedly connected to the side of the column away from the running platform. A portion of the column limiting member is located on the side of the limiting locking part facing the folding position of the column.

[0009] When the column is in the unfolded state, the column is in contact with a portion of the column limiting member, and the locking member is securely connected to both the limiting locking part and the column limiting member.

[0010] Optionally, the portion of the column limiting member located on the side of the limiting locking part facing the folded position of the column has a connecting hole. When the column is in the unfolded state, the locking member passes through the connecting hole and is securely connected to the limiting locking part.

[0011] Optionally, the column limiting component includes: a connecting plate fixedly connected to the side of the running platform, and a limiting plate fixedly connected to the end of the connecting plate, wherein the limiting plate and the connecting plate form a bent structure, and the limiting plate has the connecting hole;

[0012] When the column is in the unfolded state, the column is in contact with the limiting plate.

[0013] Optionally, the limiting locking part has a threaded hole, and the circumferential side of the locking member has an external thread that mates with the threaded hole.

[0014] Optionally, the rotating support assembly includes: the rotating shaft and the limiting nut, the first end of the rotating shaft being fixedly connected to the side of the running platform, and the limiting nut being threadedly connected to the second end of the rotating shaft; a portion of the column is sleeved on the rotating shaft and located between the first end of the rotating shaft and the limiting nut.

[0015] Optionally, the outer circumference of the second end of the rotating shaft has a first limiting plane facing the limiting nut and a second limiting plane perpendicular to the first limiting plane, and the extending direction of the second limiting plane is parallel to the axial direction of the rotating shaft.

[0016] The rotating support assembly further includes: a first limiting washer sleeved on the rotating shaft and located between the column and the limiting nut, wherein the side of the first limiting washer facing away from the limiting nut contacts the first limiting plane, and the side wall of the inner hole of the first limiting washer has a snap-fit ​​plane that contacts the second limiting plane.

[0017] Optionally, the end of the column facing away from the rotating support assembly has a support frame; the treadmill further includes: a handrail and a limiting fastener, one end of the handrail being rotatably connected to the support frame;

[0018] The limiting fastener is configured to be fastened to both the handrail and the support frame after the handrail is rotated to an unfolded state relative to the support frame; and to be fastened to both the handrail and the support frame after the handrail is rotated to a folded state relative to the support frame.

[0019] Optionally, the support frame has a first fastening hole and a second fastening hole, the central axis of the second fastening hole is perpendicular to the central axis of the first fastening hole and parallel to the rotation axis of the handrail and the support frame; one end of the handrail has a third fastening hole that mates with the first fastening hole and a fourth fastening hole that mates with the second fastening hole;

[0020] When the armrest is switched from a folded state to an unfolded state, the third fastening hole rotates to align with and communicate with the first fastening hole, and the limiting fastener is inserted into the first fastening hole and the third fastening hole; when the armrest is switched from an unfolded state to a folded state, the fourth fastening hole rotates to align with and communicate with the second fastening hole, and the limiting fastener is inserted into the second fastening hole and the fourth fastening hole.

[0021] Optionally, the support frame has a cavity communicating with both the first and second fastening holes, and an opening communicating with the cavity, a portion of the opening facing the unfolded position of the armrest, and another portion of the opening facing the folded position of the armrest; the second fastening hole is disposed opposite to the other portion of the opening;

[0022] One end of the handrail is located inside the cavity and is rotatably connected to the support frame.

[0023] Optionally, the support frame has a rotating shaft, the central axis of which is parallel to the central axis of the second fastening hole; one end of the handrail has a transition hole, through which the handrail is sleeved on the rotating shaft and rotates relative to the rotating shaft.

[0024] The beneficial effects of the technical solutions provided in this application include at least the following:

[0025] A horizontally arranged rotating support assembly enables a movable connection between the upright column and the running platform, allowing the column to switch between an unfolded and folded state and providing lateral restraint. A vertically arranged unfolding locking assembly contacts the column's limiting component after the column is unfolded, securing the limiting locking part on the column to the limiting component and providing longitudinal locking force. This effectively ensures the stability of the column in the unfolded state, preventing it from wobbling and improving the user experience. Furthermore, the simple structure of the unfolding locking assembly reduces the treadmill's manufacturing costs. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a treadmill provided in an embodiment of this application;

[0028] Figure 2 yes Figure 1 The diagram shows a partial structural representation of the treadmill.

[0029] Figure 3 yes Figure 2 The diagram shows the effect of folding the treadmill's uprights.

[0030] Figure 4 This is an exploded view of a portion of the structure of a treadmill provided in an embodiment of this application;

[0031] Figure 5 This is an exploded view of a partial structure of another treadmill provided in an embodiment of this application;

[0032] Figure 6 This is a partial structural schematic diagram of another treadmill provided in an embodiment of this application;

[0033] Figure 7 yes Figure 6 The diagram shown is an exploded view of part of the treadmill's structure.

[0034] Figure 8 This is a schematic diagram illustrating the effect of a handrail component in a folded position according to an embodiment of this application.

[0035] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0038] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0039] Please refer to Figure 1 , Figure 2and Figure 3 , Figure 1 This is a schematic diagram of the structure of a treadmill provided in an embodiment of this application. Figure 2 yes Figure 1 The diagram shown is a partial structural schematic of the treadmill. Figure 3 yes Figure 2 The diagram shows the effect of the treadmill's uprights after folding. The treadmill may include: a running platform 100, a rotating support assembly 200, uprights 300, and an unfolding and locking assembly 400. Here, there can be two rotating support assemblies 200 and two unfolding and locking assemblies 400, corresponding to the two uprights 300 in the treadmill.

[0040] The rotating support assembly 200 in the treadmill can be installed on the side of the running platform 100, and the rotating shaft 201 in the rotating support assembly 200 can be set perpendicular to the side of the running platform 100.

[0041] The upright column 300 in the treadmill can be sleeved on the rotating shaft 201 in the rotating support assembly 200 and can rotate relative to the rotating shaft 201. For example, the upright column 300 can be sleeved on the circumferential side of the rotating shaft 201 through a sleeve hole.

[0042] The unfolding and locking assembly 400 in the treadmill may include: a column limiting member 401, a limiting locking part 402, and a locking member 403. The column limiting member 401 can be fixed to the side of the running platform 100 and located on the side of the rotating support assembly 200 opposite to the surface of the running platform 100. The limiting locking part 402 can be fixedly connected to the side of the column 300 opposite to the running platform 100, and a portion of the column limiting member 401 can be located on the side of the limiting locking part 402 facing the folded position of the column 300. Here, the folded position of the column 300 is the position of the column 300 in the folded state, and the unfolded position of the column 300 is the position of the column 300 in the unfolded use state.

[0043] When the column 300 is in the unfolded state, it can contact a portion of the column limiting member 401 (i.e., the portion of the column limiting member 401 located on the side of the limiting locking part 402 facing the folded position of the column 300), and the locking member 403 can be securely connected to both the limiting locking part 402 and the column limiting member 401. When the column 300 needs to be folded, the locking member 403 is disengaged from the limiting locking part 401, allowing the column 300 to rotate relative to the rotation shaft 201 in the rotation support assembly 200 to the folded position.

[0044] In this embodiment, a laterally arranged rotating support assembly 200 enables a movable connection between the upright column 300 and the running platform 100, allowing the upright column 300 to switch between an unfolded and folded state and providing lateral limitation. A longitudinally arranged unfolding locking assembly 400 contacts the upright column limiting member 401 after the upright column 300 is unfolded, and a locking member 403 securely connects the limiting locking part 402 on the upright column 300 to the upright column limiting member 401, providing longitudinal locking force to the upright column 300. This effectively ensures the stability of the upright column 300 in the unfolded state, making it less prone to shaking and improving the user experience. Furthermore, the simple structure of the unfolding locking assembly 400 reduces the manufacturing cost of the treadmill.

[0045] In summary, this application provides a treadmill that includes: a running platform, a rotating support assembly, an upright column, and an unfolding and locking assembly. The laterally arranged rotating support assembly enables a movable connection between the upright column and the running platform, allowing the upright column to switch between an unfolded and folded state and providing lateral limitation. The longitudinally arranged unfolding and locking assembly allows the upright column to contact the upright limiting component after unfolding, and the locking component securely connects the limiting locking part on the upright column to the upright limiting component, providing longitudinal locking force to the upright column. This effectively ensures the stability of the upright column in the unfolded state, making it less prone to shaking and improving the user experience. Furthermore, the simple structure of the unfolding and locking assembly reduces the manufacturing cost of the treadmill.

[0046] Optional, please refer to Figure 4 , Figure 4 This is an exploded view of a partial structure of a treadmill provided in an embodiment of this application. The portion of the column limiting member 401 located on the folded side of the limiting locking part 401 facing the column 300 may have a connecting hole k1. When the column 300 is in the unfolded state, the locking member 403 can pass through the connecting hole k1 in the column limiting member 401 and be securely connected to the limiting locking part 402 on the column 300. Thus, after one end of the locking member 403 passes through the connecting hole k1 in the column limiting member 401 and is securely connected to the limiting locking part 402, the other end of the locking member 403 can be limited and abutted against the side of the column limiting member 401 away from the limiting locking part 402, ensuring the connection stability between the column 300 and the column limiting member 401. For example, the connecting hole k1 can be a through hole or a threaded hole, the limiting locking part 402 can have a threaded hole, and the circumferential side of the locking member 403 can have an external thread that mates with the threaded hole in the limiting locking part 402. It should be noted that the locking member 403 can also be fastened to the column limiting member 401 and the limiting locking part 402 by means of snap-fit ​​or other methods, and this application embodiment does not specifically limit this.

[0047] In the embodiments of this application, such as Figure 4 As shown, the column limiting member 401 in the unfolding locking assembly 400 may include: a connecting plate 401a fixedly connected to the side of the running platform 100, and a limiting plate 401b fixedly connected to the connecting plate 401a. The limiting plate 401b can form a bent structure with the connecting plate 401a, and the limiting plate 401b may be provided with a connecting hole k1. When the column 300 is in the unfolded state, the column 300 can contact the limiting plate 401b. Here, the connecting plate 401a can be fixed to the side of the running platform 100 by welding or other methods.

[0048] For example, the bending structure formed by the fixed connection of the connecting plate 401a and the limiting plate 401b can be "L" shaped. In this way, the "L" shaped column limiting component 401 improves the limiting effect on the column 300 while ensuring convenient assembly, ensuring that the column 300 is not easily shaken during use.

[0049] Optional, such as Figure 4 As shown, the rotating support assembly 200 in the treadmill may include a rotating shaft 201 and a limiting nut 202. The first end of the rotating shaft 201 may be fixedly connected to the side of the running platform 100, and the limiting nut 202 may be threadedly connected to the second end of the rotating shaft 201. A portion of the upright 300 is sleeved on the rotating shaft 201 and located between the first end of the rotating shaft 201 and the limiting nut 202.

[0050] Please refer to the following in this application: Figure 4 and Figure 5 , Figure 5 This is an exploded view of a partial structure of another treadmill provided in this application embodiment. The outer circumference of the second end of the rotating shaft 201 may have a first limiting plane m1 facing the limiting nut 202, and a second limiting plane m2 perpendicular to the first limiting plane m1, and the extension direction of the second limiting plane m2 may be parallel to the axial direction of the rotating shaft 201. The rotating support assembly 200 may further include: a first limiting washer 203 sleeved on the rotating shaft 201 and located between the column 300 and the limiting nut 202, the side of the first limiting washer 203 facing away from the limiting nut 202 may contact the first limiting plane m1, and the side wall of the inner hole of the first limiting washer 203 may have a snap-fit ​​plane m3 that contacts the second limiting plane m2. In this way, the cooperation between the snap-fit ​​plane m3 in the first limiting washer 203 and the second limiting plane m2 makes the first limiting washer 203 less prone to rotation, strengthens the limiting ability, and ensures the connection stability between the limiting nut 202 and the rotating shaft 201. In addition, the first limiting shim 203 abuts against the first limiting plane m1 of the rotating shaft 201, ensuring the ease of rotation of the column 300 sleeved on the rotating shaft 201.

[0051] It should be noted that, in order to ensure the stability of the connection between the column 300 and the rotating shaft 201 after multiple folding and unfolding on the rotating shaft 201, a friction-reducing sleeve 204 can be fixed in the sleeve hole of the column 300, and the column 300 is sleeved on the rotating shaft 201 through the friction-reducing sleeve 204.

[0052] Optional, please refer to Figure 6 , Figure 7 and Figure 8 , Figure 6 This is a partial structural diagram of another treadmill provided in an embodiment of this application. Figure 7 yes Figure 6 The diagram shown is an exploded view of part of the treadmill's structure. Figure 8 This is a schematic diagram illustrating the effect of a handrail component in a folded position according to an embodiment of this application. The end of the upright column 300 in the treadmill facing away from the rotating support assembly 200 may have a support frame 301. The treadmill may also include a handrail component 500 and a limiting fastener 600, one end of which can be rotatably connected to the support frame 301. The limiting fastener 600 may be configured to: be securely connected to both the handrail component 500 and the support frame 301 after the handrail component 500 rotates relative to the support frame 301 to an unfolded state; and be securely connected to both the handrail component 500 and the support frame 301 after the handrail component 500 rotates relative to the support frame 301 to a folded state. In this way, by setting the handrail 500 in the treadmill to be rotatably connected to the support frame 301, the handrail 500 can be rotated to an unfolded state relative to the support frame 301 of the column 300 for easy gripping by the user. When not in use, the handrail 500 can be rotated to a folded state relative to the support frame 301 of the column 300, thereby reducing the space occupied and facilitating transportation.

[0053] In this application, as Figure 6 and Figure 7As shown, the support frame 301 may have a first fastening hole k2 and a second fastening hole k3. The central axis of the second fastening hole k3 may be perpendicular to the central axis of the first fastening hole k2 and parallel to the rotation axis L of the handrail 500 and the support frame 301. One end of the handrail 500 may have a third fastening hole k4 that mates with the first fastening hole k2 and a fourth fastening hole k5 that mates with the second fastening hole k3. When the handrail 500 is switched from a folded state to an unfolded state, the third fastening hole k4 in the handrail 500 can be rotated to align and communicate with the first fastening hole k2 in the support frame 301, and the limiting fastener 600 can be inserted into the first fastening hole k2 and the third fastening hole k4. When the armrest component 500 switches from the unfolded state to the folded state, the fourth fastening hole k5 in the armrest component 500 rotates to align and connect with the second fastening hole k3 in the support frame 301, and the limiting fastener 600 can be inserted into the second fastening hole k3 and the fourth fastening hole k5. Here, the limiting fastener 600 can be a locking screw, and the first fastening hole k2, the second fastening hole k3, the third fastening hole k4, and the fourth fastening hole k5 can all be threaded holes that mate with the locking screw.

[0054] In this configuration, two fastening holes are provided in the support frame 301, and two corresponding fastening holes are also provided at the end of the handrail component 500. Thus, when the handrail component 500 is rotated to the unfolded state, the corresponding two fastening holes in the support frame 301 and the handrail component 500 are aligned and connected. A stable connection between the handrail component 500 and the support frame 301 is achieved by locking the limiting fastener 600 to the two fastening holes. When the handrail component 500 is switched from the unfolded state to the folded state, the limiting fastener 600 is released, allowing the handrail component 500 to be rotated to the folded position. This simplified connection structure between the handrail component 500 and the column 300 results in low manufacturing costs, easy and cost-effective troubleshooting, and user-friendly operation, improving convenience and user experience.

[0055] For example, such as Figure 7 and Figure 8 As shown, the support frame 301 may have a cavity A communicating with both the first fastening hole k2 and the second fastening hole k3, and an opening k6 communicating with the cavity A. A portion of the opening k6 faces the unfolded position of the handrail member 500, and another portion of the opening k6 faces the folded position of the handrail member 500. The second fastening hole k3 in the support frame 301 may be arranged opposite to the other portion of the opening k6. One end of the handrail member 500 may be located inside the cavity A of the support frame 301 and rotatably connected to the support frame 301. In this way, one end of the handrail member 500 can extend into the cavity A of the support frame 301 and rotatably connect to the support frame 301 along the extension direction of the opening k6. In addition, the cavity A in the support frame 301 serves to position and mount the end of the handrail member 500.

[0056] In the embodiments of this application, such as Figure 7 As shown, the support frame 301 may include a top plate 301a and two oppositely arranged side plates 301b. The two side plates 301b are fixedly connected to both sides of the top plate 301a, and the two side plates 301b and the top plate 301a are intersecting to form a cavity A. The first fastening hole k2 may be distributed on the top plate 301a, and the second fastening hole k3 may be distributed on the two side plates 301b.

[0057] Optional, such as Figure 7 As shown, the support frame 301 may have a rotating shaft 301c, the central axis of which may be arranged parallel to the central axis of the second fastening hole k3 in the support frame 301. One end of the handrail member 500 may have a transition hole k7, through which the handrail member 500 can be sleeved on the rotating shaft 301c and can rotate relative to the rotating shaft 301c.

[0058] It should be noted that the handrail component 500 can typically rotate clockwise or counterclockwise relative to the support frame 301 on the column 300 to switch to a folded state. Thus, the position of the rotation shaft 301c on the support frame 301 and the second fastening hole k3 can be set according to the rotation direction of the handrail component 500. For example, as... Figure 8 As shown, the rotating shaft 301c can be closer to the column 300 relative to the second fastening hole k3 in the support frame 301. In this way, after the handrail 500 rotates clockwise relative to the support frame 301 to the folded position, the fourth fastening hole k5 in the handrail 500 is aligned and connected with the second fastening hole k3 in the support frame 301. The handrail 500 and the support frame 301 are fastened together by locking the limiting fastener 600 with the two fastening holes.

[0059] For example, the central angle of the adapter hole k7 at one end of the handrail piece 500 can be greater than or equal to 90 degrees and less than or equal to 360 degrees.

[0060] Optionally, the treadmill may also include a damping pad (not shown) fixed to the circumferential side of the rotating shaft 301c, which can slide in contact with the inner wall of the adapter hole k7. This increases the frictional force when the adapter hole k7 rotates, preventing the handrail 500 from falling and rotating downwards due to its own weight and colliding with the upright column 300 when the limiting fastener 600 unlocks and exits the third fastening hole k4. For example, the damping pad may be a ring-shaped structure made of rubber or foam.

[0061] In the embodiments of this application, such as Figure 7As shown, the treadmill may further include a cushioning pad 700 fixed to the side of the handrail 500 facing the folded position. By providing the cushioning pad 700 on one side of the handrail 500, a certain amount of cushioning is provided when the handrail 500 rotates to the folded position and contacts the upright 300, avoiding hand pinching and excessive noise from impacts. For example, the cushioning pad 700 may be a structure made of rubber or foam.

[0062] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0063] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A treadmill characterized by, include: Running platform, rotating support assembly, column, and unfolding locking assembly; The rotating support assembly is installed on the side of the running platform, and the rotating shaft in the rotating support assembly is perpendicular to the side of the running platform. The column is sleeved on the rotating shaft in the rotating support assembly and rotates relative to the rotating shaft; The unfolding locking assembly includes: a column limiting member, a limiting locking part, and a locking member. The column limiting member is fixed to the side of the running platform and is located on the side of the rotating support assembly away from the running platform surface. The limiting locking part is fixedly connected to the side of the column away from the running platform. A portion of the column limiting member is located on the side of the limiting locking part facing the folding position of the column. When the column is in the unfolded state, the column is in contact with a portion of the column limiting member, and the locking member is securely connected to both the limiting locking part and the column limiting member.

2. The treadmill of claim 1, wherein, The portion of the column limiting member located on the side of the limiting locking part facing the folded position of the column has a connecting hole. When the column is in the unfolded state, the locking member passes through the connecting hole and is securely connected to the limiting locking part.

3. The treadmill of claim 2, wherein, The column limiting component includes: a connecting plate fixedly connected to the side of the running platform, and a limiting plate fixedly connected to the end of the connecting plate. The limiting plate and the connecting plate form a bent structure, and the limiting plate has the connecting hole. When the column is in the unfolded state, the column is in contact with the limiting plate.

4. The treadmill of claim 3, wherein, The limiting locking part has a threaded hole, and the circumferential side of the locking member has an external thread that mates with the threaded hole.

5. The treadmill of claim 1, wherein, The rotating support assembly includes: the rotating shaft and the limiting nut, the first end of the rotating shaft is fixedly connected to the side of the running platform, and the limiting nut is threadedly connected to the second end of the rotating shaft; a portion of the column is sleeved on the rotating shaft and located between the first end of the rotating shaft and the limiting nut.

6. The treadmill of claim 5, wherein, The outer circumference of the second end of the rotating shaft has a first limiting plane facing the limiting nut and a second limiting plane perpendicular to the first limiting plane, and the extension direction of the second limiting plane is parallel to the axial direction of the rotating shaft. The rotating support assembly further includes: a first limiting washer sleeved on the rotating shaft and located between the column and the limiting nut, wherein the side of the first limiting washer facing away from the limiting nut contacts the first limiting plane, and the side wall of the inner hole of the first limiting washer has a snap-fit ​​plane that contacts the second limiting plane.

7. The treadmill of any one of claims 1-6, wherein, The end of the column facing away from the rotating support assembly has a support frame; the treadmill also includes: a handrail and a limiting fastener, one end of the handrail being rotatably connected to the support frame; The limiting fastener is configured to be fastened to both the handrail and the support frame after the handrail is rotated to an unfolded state relative to the support frame; and to be fastened to both the handrail and the support frame after the handrail is rotated to a folded state relative to the support frame.

8. The treadmill of claim 7, wherein, The support frame has a first fastening hole and a second fastening hole. The central axis of the second fastening hole is perpendicular to the central axis of the first fastening hole and parallel to the rotation axis of the handrail and the support frame. One end of the handrail has a third fastening hole that mates with the first fastening hole and a fourth fastening hole that mates with the second fastening hole. When the armrest is switched from a folded state to an unfolded state, the third fastening hole rotates to align with and communicate with the first fastening hole, and the limiting fastener is inserted into the first fastening hole and the third fastening hole; when the armrest is switched from an unfolded state to a folded state, the fourth fastening hole rotates to align with and communicate with the second fastening hole, and the limiting fastener is inserted into the second fastening hole and the fourth fastening hole.

9. The treadmill of claim 8, wherein, The support frame has a cavity that communicates with both the first fastening hole and the second fastening hole, and an opening that communicates with the cavity. A portion of the opening faces the unfolded position of the armrest, and another portion of the opening faces the folded position of the armrest. The second fastening hole is positioned opposite to another portion of the opening; One end of the handrail is located inside the cavity and is rotatably connected to the support frame.

10. The treadmill of claim 9, wherein, The support frame has a rotating shaft, the central axis of which is parallel to the central axis of the second fastening hole; one end of the handrail has a transition hole, through which the handrail is sleeved on the rotating shaft and rotates relative to the rotating shaft.

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