Side arm folding mechanism and treadmill

Abstract

The utility model discloses a kind of side handrail folding mechanism and treadmill, including base and rotating connection on the handrail of base, handrail is provided with linkage pin assembly, linkage pin assembly includes first pin, second pin and trigger assembly, first pin and second pin are respectively set in different positions of handrail, base is spaced apart and is provided with first connecting hole and second connecting hole in first direction, first pin can be inserted into first connecting hole, and second pin can be inserted into second connecting hole, to make handrail lock in first direction;Base is also provided with third connecting hole corresponding with first pin or second pin in second direction, to make handrail lock in second direction;Trigger assembly is simultaneously connected first pin and second pin, can drive first pin and second pin move along the axial direction of handrail, to make handrail from first direction or second direction unlock, and can rotate on base.The utility model improves the stability of the whole when handrail is in locking state.

Description

Technical Field

[0001] This utility model relates to the field of fitness equipment, and in particular to a side armrest folding mechanism and a treadmill. Background Technology

[0002] Treadmills are very popular fitness equipment. Most treadmills currently on the market have non-foldable handrails. However, based on user surveys, different users have different requirements for treadmill handrails. Some users want handrails for easy gripping during rest, while others want foldable handrails during exercise to avoid collisions. Foldable handrails are especially important for small home treadmills.

[0003] The folding process of existing folding handrails is cumbersome, making it difficult for users to fold them quickly during exercise. Furthermore, the folding direction of existing handrails is generally downward, which means that the folded handrail still occupies a lot of space, reducing the user experience. Utility Model Content

[0004] The purpose of this utility model is to provide a side armrest folding mechanism to solve the problem that the folded armrests of treadmills still occupy a large area and reduce the user experience in the existing technology. The specific technical solution is as follows:

[0005] This utility model provides a side armrest folding mechanism, including a base and an armrest rotatably connected to the base. A linkage spring pin assembly is provided on the armrest, comprising a first spring pin, a second spring pin, and a trigger assembly. The first and second spring pins are respectively positioned at different locations on the armrest. The base has a first connecting hole and a second connecting hole spaced apart in a first direction. The first spring pin can be inserted into the first connecting hole, and the second spring pin can be inserted into the second connecting hole, thereby locking the armrest in the first direction. The base also has a third connecting hole corresponding to either the first or second spring pin in a second direction, thereby locking the armrest in the second direction. The trigger assembly is simultaneously connected to the first and second spring pins, and can drive the first and second spring pins to move along the axial direction of the armrest, thereby unlocking the armrest from the first or second direction and allowing it to rotate on the base.

[0006] Furthermore, the first direction is the direction in which the handrail unfolds, and the second direction is the direction in which the handrail folds. The base is provided with a handrail mounting seat extending along the first direction. The handrail mounting seat includes a base plate disposed at the axial end, a first side plate on the upper or lower side of the base plate, and a second side plate on the left or right side of the base plate. A first connecting hole is disposed on the base plate, and a second connecting hole is disposed on the first side plate so that the unfolded handrail and the handrail mounting seat are on the same straight line. A third connecting hole is disposed on the second side plate so that the folded handrail and the handrail mounting seat are perpendicular to each other.

[0007] Furthermore, the handrail includes two sets arranged opposite to each other. The base is provided with two sets of handrail mounting seats corresponding to each handrail. The second side plates on the two sets of handrail mounting seats are arranged in a direction away from each other so that the two handrails can be folded close to each other. The axial direction of the third connecting hole on the two second side plates is at an angle equal in magnitude but opposite in direction to the thickness direction of the second side plate so that the two handrails maintain a preset distance and are parallel to each other after folding.

[0008] Furthermore, a connecting shaft is provided at the end of the handrail. One end of the connecting shaft is provided with a protruding stepped shaft, and the base is provided with an inwardly recessed stepped connecting hole. The stepped shaft is rotatably connected to the stepped connecting hole. The other end of the connecting shaft is provided with an inwardly recessed connecting round hole, and a handrail bushing is fixedly connected to the base. The handrail bushing is rotatably connected to the connecting round hole.

[0009] Furthermore, the first spring pin is located inside the handrail and extends from the end of the handrail; the second spring pin is connected to the side wall of the handrail through a bushing, the bushing and the end of the handrail are kept at a preset distance, and the second spring pin can extend or retract to the end of the bushing.

[0010] Furthermore, the trigger assembly includes a wrench rotatably connected to the armrest, with a connecting plate rotatably connected to the wrench. The connecting plate is connected to the ends of the first spring pin and the second spring pin away from the base, respectively.

[0011] Furthermore, the connecting plate has a bent structure. The first end of the connecting plate extends into the handrail and extends along the axial direction of the handrail towards the end of the handrail to connect with the first spring pin. The second end of the connecting plate extends out from the side wall of the handrail and extends along the radial direction of the handrail away from the handrail to connect with the second spring pin.

[0012] Furthermore, the first end of the wrench extends into the inside of the handrail and is rotatably connected to the handrail inside. The second end of the wrench extends out of the handrail. The handrail is provided with a sliding groove for the middle part of the wrench to slide in the sliding groove while the wrench rotates around the first end of the wrench when the second end of the wrench is turned.

[0013] Furthermore, the first spring pin is a pull rod pin, which is a slender rod-shaped structure. The first end of the pull rod pin extends from the end of the handrail, and the second end of the pull rod pin is connected to the trigger assembly. The second spring pin includes a limiting pin and a pull pin connected to each other. One end of the pull pin extends into the bushing and is connected to the limiting pin. The other end of the pull pin is connected to the trigger assembly. A limiting boss is provided in the middle area of ​​the pull pin. The limiting boss abuts against the end of the bushing away from the end of the handrail. A spring is provided on the pull pin. One end of the spring abuts against the limiting pin, and the other end abuts against the bushing, so as to provide elastic force to the limiting pin near the end of the handrail.

[0014] Another aspect of this utility model provides a treadmill, including the side armrest folding mechanism described above.

[0015] The side armrest folding mechanism of this utility model has the following advantages:

[0016] 1. The linkage spring pin assembly is adopted, and the first spring pin and the second spring pin simultaneously limit the handrail, which improves the overall stability of the handrail in the locked state;

[0017] 2. The trigger assembly connects the first spring pin and the second spring pin simultaneously, allowing control of the movement of both spring pins with a single operation. This improves the stability of the armrest after locking and makes the folding and unfolding of the armrest easier.

[0018] 3. The handrails are folded together on the handrail mounting base in a side-hugging manner. By controlling the side-hugging angle of the two handrails, interference between the handrails due to insufficient frame width can be prevented.

[0019] 4. One end of the connecting shaft is provided with a stepped shaft protruding along the side of the handrail, and the base is provided with an inwardly recessed stepped connecting hole. The stepped shaft at the end of the handrail is rotatably connected to the stepped connecting hole. The other end of the connecting shaft is provided with an inwardly recessed connecting round hole. The stepped connecting shaft is fixedly connected to the base, and the stepped connecting shaft is rotatably connected to the connecting round hole, so that the handrail can achieve the function of rotation while achieving the effect of anti-loosening. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the handrail unfolded according to an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the folded armrest according to an embodiment of the present invention.

[0022] Figure 3 This is an exploded view of the column handrail assembly according to an embodiment of the present utility model.

[0023] Figure 4 This is a schematic diagram of the handrail structure according to an embodiment of the present utility model.

[0024] Figure 5 This is an exploded view of the handrail according to an embodiment of the present utility model.

[0025] Figure 6 This is a cross-sectional view of the handrail according to an embodiment of the present utility model. Detailed Implementation

[0026] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0027] The side armrest folding mechanism provided in this embodiment of the utility model is mainly used on treadmills, such as... Figure 1 The diagram shows the handrail 01 when it is unfolded, where handrail 01 is connected to the column 02. Figure 1 This is a diagram showing the overall appearance and structure of the treadmill. Figure 2 In order to be in Figure 1 Based on this, a general framework diagram of column 02 and handrail 01 is shown, along with a schematic diagram of handrail 01 after folding. Figure 2 As can be seen, in this embodiment of the utility model, the handrail 01 is folded in a side-hugging manner, which occupies less space compared to a treadmill with a downward-folding handrail 01; at the same time, the side-hugging angles between the two handrails 01 are not the same, which prevents the two handrails 01 from interfering with each other due to insufficient width between the uprights 02.

[0028] Specifically, Figures 2-6 As shown, the side armrest folding mechanism provided in this embodiment of the utility model includes a base and an armrest 01 rotatably connected to the base. For treadmills, the base is generally a column 02 connected to the running platform.

[0029] Furthermore, the handrail 01 is equipped with a linkage spring pin assembly, which includes a first spring pin 11, a second spring pin, and a trigger assembly. The first spring pin 11 and the second spring pin are respectively located at different positions on the handrail 01, such as... Figure 4 As shown, the first spring pin 11 extends from the axial end of the armrest 01, and the second spring pin is connected to the side wall of the armrest 01, preferably the lower side wall. This makes the first spring pin 11 and the second spring pin misaligned with each other in both the axial direction and the height direction. The two can be connected at different positions on the base, thereby improving the stability of the armrest 01 when locked.

[0030] Accordingly, the base is provided with a first connecting hole and a second connecting hole 31 spaced apart in the first direction. A first spring pin 11 can be inserted into the first connecting hole, and a second spring pin can be inserted into the second connecting hole 31, so that the armrest 01 is locked in the first direction. The base is also provided with a third connecting hole 32 corresponding to the first spring pin or the second spring pin in the second direction. The first spring pin 11 or the second spring pin can be inserted into the third connecting hole 32, so that the armrest 01 is locked in the second direction. In a specific embodiment of this utility model, the first direction is the direction of the armrest 01 after it is unfolded, and the second direction is the direction of the armrest 01 after it is folded. Since the armrest 01 needs to provide more support force after it is unfolded, in the preferred embodiment of this utility model, the first connecting hole and the second connecting hole 31 are provided in the first direction to improve the stability of the armrest 01. After the armrest 01 is folded, it is only necessary to ensure that the armrest 01 can maintain the folded position, without the need for additional support force. Therefore, only the third connecting hole 32 is provided in the second direction. This utility model fully considers the force requirements in different directions and simplifies the mechanical structure while ensuring the stability of the armrest 01.

[0031] Furthermore, the trigger assembly provided in this embodiment of the present invention simultaneously connects the ends of the first spring pin 11 and the second spring pin away from the base, which can drive the first spring pin 11 and the second spring pin to move along the axial direction of the armrest 01, so that the armrest 01 is unlocked when the first spring pin 11 and the second spring pin are away from the end of the armrest 01, and the armrest 01 can reciprocate between the first direction and the second direction on the base. In a specific embodiment of the present invention, an elastic element is also provided between the trigger assembly and the base. In its natural state, the elastic element provides a spring force close to the base for the first spring pin 11 and / or the second spring pin, so that the first spring pin 11 and the second spring pin are kept in the locked position. Only when the trigger is moved will it resist the spring force of the elastic element and realize the unlocking of the armrest 01. The present invention cleverly designs the structure of the trigger assembly so that it can simultaneously control the first spring pin 11 and the second spring pin, which simplifies the mechanical structure while ensuring the connection stability of the armrest 01, and the action relationship is stable and reliable.

[0032] Furthermore, such as Figures 5-6 As shown, in this embodiment of the present invention, the first spring pin 11 is disposed inside the handrail 01 and extends from the end of the handrail 01. In a preferred embodiment of the present invention, the first spring pin 11 is a slender pull rod pin, with the first end of the pull rod pin extending from the end of the handrail 01 and the second end of the pull rod pin having a connecting hole. The pull rod pin can be connected to a trigger assembly through the connecting hole, and the first spring pin 11 can be displaced in the axial direction of the handrail 01 by pulling the trigger assembly. In a preferred embodiment of the present invention, since the first spring pin 11 needs to extend into the handrail 01, setting it as a pull rod pin reduces the need for a spring pin assembly consisting of a spring pin and a spring inside the handrail 01, simplifying the internal structure of the handrail 01 and facilitating the overall installation of the handrail 01. It is understood that in some embodiments, the first spring pin 11 can also be configured by using a spring pin in conjunction with an elastic element; its specific structure can be referred to the connection method of the second spring pin.

[0033] Furthermore, in this embodiment of the present invention, the second spring pin is connected to the side wall of the handrail 01 via a bushing 13. The bushing 13 and the end of the handrail 01 maintain a preset distance, and the second spring pin can extend or retract from the end of the bushing 13. Specifically, the bushing 13 is fixedly connected to the side wall of the handrail 01. The second spring pin includes a limiting pin 12 and a pull pin 14 connected to each other. One end of the pull pin 14 extends into the inside of the bushing 13 and is connected to the limiting pin 12. The other end of the pull pin 14 is connected to the trigger assembly. A limiting boss is provided in the middle region of the pull pin 14. The limiting boss abuts against the end of the bushing 13 away from the end of the handrail 01. Understandably, the radius of the limiting boss should be greater than the inner diameter of the bushing 13 so that the limiting boss is kept outside the bushing 13.

[0034] Furthermore, a spring 15 is also provided inside the bushing 13. The spring 15 is sleeved on the outside of the pull pin 14, so that one end of the spring 15 abuts against the limiting pin 12 and the other end abuts against the bushing 13, providing elastic force to the limiting pin 12 near the end of the handrail 01. By setting the second spring pin, this utility model can make the locking of the handrail 01 more stable. On the other hand, the spring 15 on the second spring pin can provide elastic force to the entire linkage spring pin assembly near the base of the handrail 01, keeping the handrail 01 in the locked state. In addition, since a limiting boss is provided in the middle area of ​​the pull pin 14, the limiting boss can not only limit the position of the limiting pin 12, but also limit the extension distance of the first spring pin 11 and the return position of the trigger assembly, ensuring the position of the entire linkage spring pin assembly in the locked state. The setting of the second spring pin makes the overall structure of the handrail 01 more stable and reliable.

[0035] Further, in this embodiment of the present invention, the trigger assembly includes a wrench 21 rotatably connected to the armrest 01, and a connecting plate 22 rotatably connected to the wrench 21. The connecting plate 22 is connected to the ends of the first spring pin 11 and the second spring pin away from the base, respectively. Specifically, a movable groove is provided at the bottom of the armrest 01, and the first end of the wrench 21 extends into the interior of the armrest 01 through the movable groove at the bottom of the armrest 01, and is rotatably connected to the side wall of the armrest 01 by bolts. Figure 5 As shown, the end of the wrench 21 that extends into the handrail 01 is a flat plate structure near the side wall of the handrail 01. This flat plate structure allows the end of the wrench 21 that extends into the handrail 01 to be closer to the side wall of the handrail 01, facilitating the connection of the wrench 21. Correspondingly, the second end of the wrench 21 is located on the outside of the handrail 01. When the second end of the wrench 21 is moved, the wrench 21 can rotate around the first end of the wrench 21, and the middle area of ​​the wrench 21 slides in the moving groove.

[0036] Furthermore, in this embodiment of the present invention, the connecting plate 22 has a bent structure. The first end of the connecting plate 22 extends into the handrail 01 and extends towards the end of the handrail 01 along the axial direction of the handrail 01 to connect with the first spring pin 11. Specifically, a connecting hole is provided on the first end of the connecting plate 22, and a connecting hole is also provided at the corresponding position of the second end of the pull rod pin. An opening for operation is provided at the corresponding position of the side wall of the handrail 01. Through the opening on the side wall of the handrail 01, the first end of the connecting plate 22 is connected to the connecting hole of the second end of the pull rod pin by screws. Thus, in the preferred embodiment of the present invention, the pull rod pin and the connecting plate 22 are fixedly connected. At this time, the pull rod pin can be limited to reciprocating along its axial direction, and the spatial position will not change.

[0037] Furthermore, the second end of the connecting plate 22 extends from the side wall of the handrail 01 and extends radially away from the handrail 01 to connect with the second spring pin. Specifically, the second end of the connecting plate 22 is also provided with a connecting hole, which is connected to the connecting hole at the end of the pull pin 14 of the second spring pin. Since the second end of the connecting plate 22 is located outside the handrail 01, the second spring pin can be directly connected to the second end of the connecting plate 22 by screws.

[0038] Further, in this embodiment of the present invention, the first direction is the direction in which the handrail 01 unfolds, and the second direction is the direction in which the handrail 01 folds. A handrail mounting base 5 extending along the first direction is provided on the base. A first connecting hole is provided at the first axial end of the handrail mounting base 5, and a second connecting hole 31 is provided on the side wall of the other end of the handrail mounting base 5. Specifically, the handrail mounting base 5 includes a base plate disposed at its axial end, a first side plate on the upper or lower side of the base plate, and a second side plate on the left or right side of the base plate. The base plate has a first connecting hole, and the first side plate has a second connecting hole 31. When the handrail 01 is rotatably connected to the handrail mounting base 5, the axial end of the handrail 01 is positioned opposite to the base plate, so that the first spring pin 11 is inserted into the first connecting hole, and the second spring pin is inserted into the second connecting hole 31. This ensures that the unfolded handrail 01 and the handrail mounting base 5 are on the same straight line.

[0039] Furthermore, the second direction is the direction in which the handrail 01 is folded, and the third connecting hole 32 is provided on the second side plate 52. After the handrail 01 is folded, the first spring pin 11 is inserted into the second side plate 52 so that the folded handrail 01 is perpendicular to the handrail mounting base 5.

[0040] In a specific embodiment of this utility model, the handrail 01 includes two symmetrically arranged sets. The base is provided with two sets of handrail mounting seats 5 corresponding to each handrail 01. The second side plates 52 on the two handrail mounting seats 5 are arranged in a direction away from each other, so that the two handrails 01 can be folded closer together. Furthermore, the axial direction of the third connecting hole 32 on the two second side plates 52 forms an angle equal in magnitude but opposite in direction to the thickness direction of the second side plate 52, so that the two handrails 01 are parallel to each other after folding. (See attached...) Figure 2 As shown, by setting the axial direction of the third connecting hole 32, the two handrails 01 are not folded at 90°. This ensures that the two handrails 01 are parallel to each other after folding, while maintaining a certain distance, thus avoiding interference between the two handrails 01 and making reasonable use of the space between the two uprights 02 of the treadmill.

[0041] Furthermore, as shown in the appendix Figure 6As shown in this embodiment of the invention, a connecting shaft 41 is also provided at the end of the handrail 01. The handrail 01 is rotatably connected to the base via the connecting shaft 41. One end of the connecting shaft 41 is provided with a protruding stepped shaft 42, and the base is provided with an inwardly recessed stepped connecting hole. The stepped shaft 42 is rotatably connected to the stepped connecting hole, so that the handrail 01 is rotatably connected to the base. Correspondingly, the other end of the connecting shaft 41 is provided with an inwardly recessed connecting round hole 43. A handrail bushing 44 is fixedly connected to the base, and the handrail bushing 44 is inserted into the connecting round hole 43 to rotatably connect with the connecting round hole 43.

[0042] Furthermore, when connecting the handrail 01, first insert the step shaft 42 on the lower side of the handrail 01 into the step connection hole, and then connect the handrail bushing 44 to the upper side of the base with screws to achieve a rotatable connection between the handrail 01 and the base. This utility model provides a rotatable connection between the handrail 01 and the base from both the upper and lower sides. Compared to the side handrail 01 shaft being locked to the main frame by a single screw, the handrail 01 connection method provided by this utility model allows the handrail 01 to rotate while also achieving an anti-loosening effect during use.

[0043] In another aspect, this invention also provides another treadmill, including the side armrest folding mechanism described above. The treadmill armrests 01 of this invention can be folded in a side-hugging manner, and by controlling the side-hugging angle of the two armrests 01, interference between the armrests 01 due to insufficient frame width can be prevented.

[0044] This utility model embodiment provides a side armrest folding mechanism with the following advantages:

[0045] 1. The linkage spring pin assembly is adopted, and the first spring pin 11 and the second spring pin simultaneously limit the handrail 01, which improves the overall stability of the handrail 01 in the locked state.

[0046] 2. The trigger assembly connects the first spring pin 11 and the second spring pin at the same time. The movement of the two spring pins can be controlled by one operation, which improves the stability of the armrest 01 after it is locked and makes the folding and unfolding operation of the armrest 01 more convenient.

[0047] 3. The handrails 01 are folded on the handrail mounting base 5 in a side-hugging manner, and the side-hugging angle of the two handrails 01 can be controlled to prevent interference between the handrails 01 due to insufficient frame width.

[0048] 4. One end of the connecting shaft 41 is provided with a stepped shaft 42 protruding laterally along the handrail 01, and the base is provided with an inwardly recessed stepped connecting hole. The stepped shaft 42 at the end of the handrail 01 is rotatably connected to the stepped connecting hole. The other end of the connecting shaft 41 is provided with an inwardly recessed connecting round hole 43. The stepped connecting shaft 41 is fixedly connected to the base, and the stepped connecting shaft 41 is rotatably connected to the connecting round hole 43, so that the handrail 01 can achieve the rotation function while achieving the anti-loosening effect.

[0049] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made to the above embodiments by those skilled in the art after reading this specification are all within the scope of protection of the present invention. The various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0050] If the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

Claims

1. A side armrest folding mechanism, characterized in that, The device includes a base and an armrest rotatably connected to the base. The armrest is equipped with a linkage spring pin assembly, which includes a first spring pin, a second spring pin, and a trigger assembly. The first and second spring pins are respectively located at different positions on the armrest. The base has a first connecting hole and a second connecting hole spaced apart in a first direction. The first spring pin can be inserted into the first connecting hole, and the second spring pin can be inserted into the second connecting hole to lock the armrest in the first direction. The base also has a third connecting hole corresponding to the first or second spring pin in a second direction to lock the armrest in the second direction. The trigger assembly is connected to both the first and second spring pins and can drive the first and second spring pins to move along the axial direction of the armrest to unlock the armrest from the first or second direction and allow it to rotate on the base.

2. The side armrest folding mechanism according to claim 1, characterized in that, The first direction is the direction in which the handrail unfolds, and the second direction is the direction in which the handrail folds. The base is provided with a handrail mounting seat extending along the first direction. The handrail mounting seat includes a base plate at the axial end, a first side plate on the upper or lower side of the base plate, and a second side plate on the left or right side of the base plate. A first connecting hole is provided on the base plate, and a second connecting hole is provided on the first side plate so that the unfolded handrail and the handrail mounting seat are on the same straight line. A third connecting hole is provided on the second side plate so that the folded handrail and the handrail mounting seat are perpendicular to each other.

3. The side armrest folding mechanism according to claim 2, characterized in that, The handrails consist of two sets arranged opposite each other. The base is provided with two sets of handrail mounting seats corresponding to each handrail. The second side plates on the two sets of handrail mounting seats are arranged in a direction away from each other so that the two handrails can be folded close to each other. The axial direction of the third connecting hole on the two second side plates is at an angle equal in magnitude but opposite in direction to the thickness direction of the second side plate so that the two handrails maintain a preset distance and are parallel to each other after folding.

4. The side armrest folding mechanism according to claim 1, characterized in that, The handrail end is also provided with a connecting shaft. One end of the connecting shaft is provided with a protruding step shaft, and the base is provided with an inwardly recessed step connecting hole. The step shaft is rotatably connected to the step connecting hole. The other end of the connecting shaft is provided with an inwardly recessed connecting round hole. The handrail bushing is fixedly connected to the base, and the handrail bushing is rotatably connected to the connecting round hole.

5. The side armrest folding mechanism according to any one of claims 1-4, characterized in that, The first spring pin is located inside the handrail and extends from the end of the handrail; the second spring pin is connected to the side wall of the handrail through a bushing, and the bushing and the end of the handrail are kept at a preset distance. The second spring pin can extend or retract from the end of the bushing.

6. The side armrest folding mechanism according to claim 5, characterized in that, The trigger assembly includes a wrench rotatably connected to the armrest, with a connecting plate rotatably connected to the wrench. The connecting plate is connected to the ends of the first spring pin and the second spring pin away from the base, respectively.

7. The side armrest folding mechanism according to claim 6, characterized in that, The connecting plate has a bent structure. The first end of the connecting plate extends into the handrail and extends along the axial direction of the handrail towards the end of the handrail to connect with the first spring pin. The second end of the connecting plate extends out from the side wall of the handrail and extends along the radial direction of the handrail away from the handrail to connect with the second spring pin.

8. The side armrest folding mechanism according to claim 7, characterized in that, The first end of the wrench extends into the handrail and is rotatably connected to the handrail inside. The second end of the wrench extends out of the handrail. The handrail is provided with a sliding groove for the middle part of the wrench to slide in the sliding groove while the wrench rotates around the first end of the wrench when the second end of the wrench is turned.

9. The side armrest folding mechanism according to any one of claims 1-4, characterized in that, The first spring pin is a pull rod pin, which is a slender rod-shaped structure. The first end of the pull rod pin extends from the end of the handrail, and the second end of the pull rod pin is connected to the trigger assembly. The second spring pin includes a limit pin and a pull pin that are connected to each other. One end of the pull pin extends into the bushing and is connected to the limit pin. The other end of the pull pin is connected to the trigger assembly. A limit boss is provided in the middle area of ​​the pull pin. The limit boss abuts against the end of the bushing away from the end of the handrail. A spring is provided on the pull pin. One end of the spring abuts against the limit pin, and the other end abuts against the bushing, so as to provide elastic force to the limit pin near the end of the handrail.

10. A treadmill, characterized in that, Includes the side armrest folding mechanism as described in any one of claims 1-9.

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