A treadmill folding adjustment device

Abstract

The application relates to the technical field of folding treadmills and discloses a folding adjusting device of a treadmill, which comprises an air spring, the bottom of the air spring is hinged to the bottom disc end of the treadmill, the top of the air spring is hinged to the inclined upright column of the treadmill through an adjusting locker, the adjusting locker is connected with the handle at the top of the inclined upright column of the treadmill through a brake wire, wherein a rotating plate, which is hinged to the adjusting locker through overfitting, is arranged in the adjusting locker, one end of the rotating plate is connected with the air valve at the top of the air spring, and the other end of the rotating plate is connected with the brake wire; the effect is that the opening or closing of the air valve is controlled through the rotating plate in the adjusting locker, so that the expansion and contraction of the air spring are controlled; when the rotating plate rotates, certain resistance needs to be overcome; when the resistance is greater than the force required for the automatic opening or closing of the air valve, one-way control of the opening or closing of the air valve is realized; the folding of the treadmill is more convenient, and the operation is simpler.

Description

Technical Field

[0001] This invention belongs to the field of folding treadmill technology, and particularly relates to a treadmill folding adjustment device. Background Technology

[0002] Gas springs are widely used in the folding mechanism of folding treadmills. Among them, the self-locking gas spring, also known as the controllable gas spring, is the most commonly used type of gas spring in the folding mechanism of folding treadmills. This type of gas spring can stop at any position in its stroke with the help of some release mechanisms, and after stopping, it has a large locking force, which can reach more than 10,000N.

[0003] Chinese invention patent CN110465045A discloses a treadmill in the field of treadmills, particularly a treadmill with a four-controllable gas spring structure and adjustable handrails in dual modes. The treadmill includes a treadmill body and a handrail assembly movably connected to the treadmill body. The handrail assembly includes handrails, uprights, and a connecting body. The treadmill body includes a frame with a slide rail in the middle. A slider corresponding to the connecting body is provided in the slide rail. The frame is provided with a first controllable gas spring for driving the slider and a second controllable gas spring for rotating the connecting body. The treadmill also includes a control device for locking and / or unlocking the first and second controllable gas springs. The treadmill features adjustable handrails, enabling it to operate in multiple modes, including forward walking, backward walking, simultaneous forward and backward walking by two people, and running. The patent specification also discloses that "pulling the metal wire 43 via the pull ring 52 causes the drive block 42 to press the button 33. At this time, the first controllable gas spring 3 and the second controllable gas spring 3a unlock simultaneously. Then, the angle of the column 22 relative to the frame 14 can be adjusted. Pushing or pulling the handrail 21 rotates the column 22 to the appropriate position. Releasing the pull ring 52 causes the button 33 to automatically rebound under the pressure within the cylinder 31, locking the first controllable gas spring 3 and the second controllable gas spring 3a simultaneously, thereby limiting the rotation of the column 22."

[0004] In other words, when controlling the locking or unlocking of the gas spring, a continuous force needs to be applied to the pull ring to keep the gas spring locked or unlocked. When the force on the pull ring is removed, the gas spring will return to its initial state. This results in a situation where at least one hand needs to operate the pull ring or someone else needs to assist in folding the treadmill, which is inconvenient to operate. Summary of the Invention

[0005] The objective of this invention is to solve the technical problem in the prior art that in order to lock or open the gas spring, a continuous force needs to be applied to the pull ring. When the force on the pull ring is removed, the gas spring will return to its initial state. This results in a situation where at least one hand is needed to operate the pull ring or other people are needed to assist in folding the treadmill, which is inconvenient to operate.

[0006] To achieve the above objectives, the present invention provides a treadmill folding adjustment device.

[0007] The specific technical solution adopted in this invention is as follows: A folding adjustment device for a treadmill includes a gas spring. The bottom of the gas spring is hinged to the end of the treadmill chassis, and the top of the gas spring is hinged to the inclined column of the treadmill via an adjusting lock. The adjusting lock is connected to a handle at the top of the inclined column of the treadmill via a brake cable. The adjusting lock contains a rotating plate hinged to it using a transition fit. One end of the rotating plate is connected to an air valve at the top of the gas spring, and the other end is connected to the brake cable. When the handle is gripped or released, the brake cable pulls or resets the adjusting lock, controlling the opening or closing of the air valve at the top of the gas spring.

[0008] Furthermore, there are two gas springs, which are respectively installed between the inclined columns on both sides of the treadmill chassis and the treadmill chassis. The gas springs are hinged to the treadmill chassis through the first hinge shaft, and the other end of the gas spring is connected to an adjusting lock. The adjusting lock is hinged to the upper middle part of the inclined column through the second hinge shaft.

[0009] Furthermore, the adjusting locking device includes an L-shaped fixing head; the corner of the L-shaped fixing head is provided with a junction hole 201, which is fitted with a second hinge shaft for hinged together with the inclined column.

[0010] Furthermore, the bottom of the L-shaped fixing head is provided with a fixing hole for fixing the piston rod of the gas spring.

[0011] Furthermore, the L-shaped fixing head is provided with an adjusting locking shaft on the side of the fixing hole, and the outer cylindrical surface of the adjusting locking shaft is connected to the rotating plate through a transition fit; the end of the rotating plate that contacts the valve plug of the air valve is provided with a rotating inclined surface.

[0012] Furthermore, the other end of the rotating plate is provided with a notch, and a brake head with a brake cable is engaged in the notch.

[0013] Furthermore, the adjusting locking device includes an adjusting locking shaft.

[0014] Furthermore, the adjusting locking shaft includes a base plate, the outer circumference of which is interference-fitted with the rotating plate, and the center of the base plate is connected to the second rotating shaft by an transition fit. The second rotating shaft is fixed at the position of the L-shaped fixing head located on the side of the fixing hole. A notch is provided on the lower side of the adjusting locking shaft, the notch including a first arc-shaped cavity and a second arc-shaped cavity. A first vertex is provided at the intersection of the first limiting surface and the seventh limiting surface, and a first rotating shaft is provided below the first vertex. A locking block is sleeved on the outer cylindrical surface of the first rotating shaft 203.

[0015] Furthermore, the first arc-shaped plate and the seventh limiting surface form a first arc-shaped cavity 2031; the first limiting surface, the sixth limiting surface, and the fifth limiting surface form a second arc-shaped cavity; a third vertex is provided on the outer side of the second arc-shaped cavity, and a fourth limiting surface is provided on the outer side of the third vertex, with the fourth limiting surface located inside the outer circle of the adjusting locking shaft.

[0016] Furthermore, the width between the lines connecting the vertices of the two arc edges of the locking block is less than the width of the first arc cavity, so that the locking block can slide within the first arc cavity; V-shaped positioning grooves are provided at both ends of the locking block.

[0017] The positive effects of this invention are: by adjusting the rotating plate inside the locking device to control the opening or closing of the air valve, the inert gas sealed inside the air spring flows in different chambers to control the extension and contraction of the air spring. Since the rotating plate is hinged to the adjusting locking device, the rotating plate needs to overcome a certain resistance when it rotates. When the resistance is greater than the force required for the air valve to open or close automatically, unidirectional control of the air valve opening or closing is achieved. Compared with the existing self-locking air springs where the air valve opening or closing requires constant manual control, this invention is more convenient and simpler to operate for running. Attached Figure Description

[0018] Figure 1 This is a front view of the treadmill to which the treadmill folding adjustment device of the present invention is applied; Figure 2 yes Figure 1 The image shows an enlarged view of point E of a treadmill folding adjustment device according to the present invention. Figure 3 yes Figure 1 The figure shown is a cross-sectional view of the folding adjustment device for a treadmill according to the present invention. Figure 4 yes Figure 3 The image shows a folded front view of a treadmill folding adjustment device according to the present invention. Figure 5 yes Figure 2 A schematic diagram of the adjusting locking shaft structure of a treadmill folding adjustment device is provided in this invention. Figure 6This is a schematic diagram of the structure of a self-locking gas spring used in a treadmill folding adjustment device of the present invention. Legend: 1—Gas spring, 101—Symmetrical gas spring, 102—Piston rod, 103—Piston cylinder, 104—Valve plug, 105—First cavity, 106—Second cavity, 107—Third cavity, 108—Fourth cavity, 109—Inner piston, 2—Adjusting locking device, 201—Hinge hole, 202—L-shaped fixing head. 203—Adjusting locking shaft; 2031—First arc-shaped cavity; 2032—First arc-shaped plate; 2033—First limiting surface; 2034—Second limiting surface; 2035—Third limiting surface; 2036—First vertex; 2037—Locking block; 2038—First rotating shaft; 2039—Second vertex; 20310—Positioning groove; 20311—Second arc-shaped plate; 20312—Third vertex; 20313—Fourth limiting surface; 20314—Fifth limiting surface; 20315—Sixth limiting surface; 20316—Base plate; 20317—Second rotating shaft; 20318—Seventh limiting surface; 204—Fixed support; 205—Notch; 206—Brake head; 207—Rotating plate; 208—Rotating inclined surface; 209—Fixed hole. 3—First clamp, 4—First hinge, 401—Second hinge, 5—Handle, 6—Second clamp, 7—Fourth clamp, 8—Brake line, 9—Angled column, 10—First hinge shaft, 11—Second hinge shaft, 12—Chassis. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments: In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0022] like Figures 1 to 5 The diagram shows a structural diagram of a treadmill folding adjustment device provided in an embodiment of the present invention. It includes a gas spring 1, the bottom of which is hinged to the end of the treadmill chassis 12. The top of the gas spring 1 is hinged to the treadmill's inclined column 9 via an adjusting locking device 2. The adjusting locking device 2 is connected to a handle 5 at the top of the treadmill's inclined column via a brake line 8. The adjusting locking device 2 includes a rotating plate 207 hinged to it using a transition fit. One end of the rotating plate 207 is connected to an air valve at the top of the gas spring 1, and the other end is connected to the brake line 8. When the handle 5 is gripped or released, the brake line 8 pulls or resets the adjusting locking device 2, controlling the opening or closing of the air valve at the top of the gas spring 1.

[0023] Figure 1 , Figure 2 and Figure 4 The red curve in the middle is the braking line 8.

[0024] In this embodiment of the invention, the opening or closing of the air valve is controlled by adjusting the rotating plate inside the locking device, so that the sealed inert gas inside the air spring flows in different chambers to control the extension and contraction of the air spring. Since the rotating plate is hinged to the adjusting locking device, a certain resistance needs to be overcome when the rotating plate rotates. When the resistance is greater than the force required for the automatic opening or closing of the air valve, unidirectional control of the opening or closing of the air valve is achieved. Compared with the prior art, where the opening or closing of the air valve of a self-locking air spring requires constant manual control, this method is more convenient and simpler to operate for running.

[0025] Specifically, such as Figures 1 to 6 As shown, a treadmill folding adjustment device includes a gas spring 1. The bottom of the gas spring 1 is hinged to the end of the treadmill chassis 12, and the top of the gas spring 1 is hinged to the treadmill's inclined column 9 via an adjusting locking device 2. The adjusting locking device 2 is connected to a handle 5 at the top of the treadmill's inclined column via a brake cable 8. The adjusting locking device 2 has a rotating plate 207 hinged to it. One end of the rotating plate 207 is connected to an air valve at the top of the gas spring 1, and the other end is connected to the brake cable 8. When the handle 5 is gripped or released, the brake cable 8 pulls or resets the adjusting locking device 2, controlling the air valve at the top of the gas spring 1 to open or close. like Figure 1As shown, the handle 5 is fixed to the side of the operating panel at the top of the inclined column 9. The brake cable 8 connected to the handle 5 is fixed to the side of the inclined column 6 by at least one of the first clamp 3, the second clamp 6, and the fourth clamp 7. The brake cable 8 mainly includes a brake cable, a protective sleeve, and a wire. The brake cable is the core part of the braking system. It is made of metal and has a certain strength and wear resistance. The protective sleeve wraps around the brake cable to provide additional protection and prevent damage to the cable. The wire is usually made of wire clips that are spliced ​​together in sections. These wire clips are wavy and have flanges and slots at the front and rear ends to ensure a stable connection of the wire. The main function of the brake cable is braking, such as converting the rider's operation of the brake lever into a braking action, thereby achieving vehicle braking. When the rider grips the brake lever, the brake cable is stretched, and the force is transmitted through the cable tube, pushing the brake components to contact the wheel and generating friction, thereby achieving the effect of deceleration or stopping. In this embodiment, the stretching of the brake cable is used to transmit force through the cable tube to push the rotating plate 207 to rotate, while the automatic return function of the brake cable is utilized. like Figure 1 and Figure 4 As shown, the bottom end of the inclined column 9 is hinged to the end of the treadmill chassis 12 via the second hinge 401, and the top end of the inclined column 9 is hinged to the treadmill control panel via the first hinge 4; by rotating at the first hinge 4 and the second hinge 401, the treadmill folds to the position shown. Figure 4 In the state shown, the brake line 8, under the fixing action of at least one of the first clamp 3, the second clamp 6, and the fourth clamp 7, moves according to... Figure 4 The pattern shown is fixed to the side of the inclined column 9 in a curved manner; Preferably, the gas spring 1 has two gas springs; for example Figure 3 As shown, one gas spring 1 is installed between the inclined column 9 and the treadmill chassis 12. The gas spring 1 is hinged to the treadmill chassis 12 through the first hinge shaft 10. The other end of the gas spring 1 is connected to an adjusting locking device 2, which is hinged to the upper middle part of the inclined column 9 through the second hinge shaft 11. The other gas spring is a symmetrical gas spring 101. The symmetrical gas spring 101 has the same structure as the gas spring 1 and is symmetrically connected between the inclined column 9 and the treadmill chassis 12 using the same mechanism. like Figure 2As shown, the adjusting locking device 2 includes an L-shaped fixing head 202; the corner of the L-shaped fixing head 202 is provided with a junction hole 201, and the junction hole 201 is fitted with a second hinge shaft 11 for hinged together with the inclined column 9; the bottom of the L-shaped fixing head 202 is provided with a fixing hole 209 for fixing the piston rod 102 of the gas spring 1, wherein the top of the piston rod 102 is provided with a valve plug 104 for the gas valve; the side of the L-shaped fixing head 202 located at the fixing hole 209 is provided with an adjusting locking shaft 203, and the outer cylindrical surface of the adjusting locking shaft 203 is connected to the rotating plate 207 through a transition fit; One end of the rotating plate 207 that contacts the valve plug 104 has a rotating inclined surface 208, which contacts the valve plug but is not fixed. The other end of the rotating plate 207 has a notch 205, in which a brake head 206 of the brake cable 8 is engaged. When the brake cable 8 is pulled, the brake head 206 drives the rotating plate 207 to rotate around the adjusting locking shaft 203 through the notch 205. Through the lever principle, the rotating inclined surface 208 drives the valve plug 104 to open or close. Since the outer cylindrical surface of the adjusting locking shaft 203 and the rotating plate 207 are fitted together, the friction provided by them provides a damping torque greater than that provided by the rotating plate 207. The air valve plug 104 provides torque to the rotating plate through the rotating inclined plane 208, thus enabling continuous locking of the air spring without requiring the brake cable 8 to exert continuous force on the rotating plate 207. Compared with the prior art, this solves the technical problem that in the prior art, a continuous force needs to be applied to the pull ring to control the locking or unlocking of the air spring. When the force on the pull ring disappears, the air spring will return to its initial state. This results in a situation where at least one hand is needed to operate the pull ring or other people are needed to assist in folding the treadmill, which is inconvenient to operate.

[0026] When it is necessary to release the lock on the gas spring, the brake cable 8 is pulled again. The brake cable 8 fixed at the fixed support 204 is the prior art. Since the brake cable 8 in the prior art is equipped with a return spring, the return spring is compressed again. When the return spring releases the elastic potential energy stored in the compression, the rotating plate 207 uses the kinetic energy generated by the elastic potential energy to impact and destroy it. Due to the damping torque provided by the overfit between the outer cylindrical surface of the adjusting locking shaft 203 and the rotating plate 207, the air valve plug 104 is reset, thereby releasing the lock on the gas spring.

[0027] Preferred, such as Figure 5As shown, for the end face structure of the adjusting locking shaft 203, the adjusting locking shaft 203 includes a base plate 20316. The outer circumference of the base plate 20316 is interference-fitted with the rotating plate 207. The center of the base plate 20316 is connected to the second rotating shaft 20317 by a transition fit. The second rotating shaft 20317 is fixed to the L-shaped fixing head 202 at the side of the fixing hole 209. A notch is provided on the lower side of the adjusting locking shaft 203. The notch includes a first arc-shaped cavity 2031 and a second arc-shaped cavity. The first arc-shaped plate 2032 and the seventh limiting surface 20318 form the first arc-shaped cavity 2031. The first limiting surface 2033, the sixth limiting surface 20315, and the fifth limiting surface 2034 form the second arc-shaped cavity. A third vertex 2032 is provided on the outer side of the second arc-shaped cavity. A fourth limiting surface 20313 is provided on the outer side of the third vertex 2032. The fourth limiting surface 20313 is located on the adjusting locking shaft 203. The inner side of the outer circle; a first vertex 2036 is provided at the intersection of the first limiting surface 2033 and the seventh limiting surface 20318, and a first rotating shaft 2038 is provided below the first vertex 2036. A locking block 2037 is fitted on the outer cylindrical surface of the first rotating shaft 203. The locking block 2037 has arc edges on both sides, and the arc edges have the same curvature as the seventh limiting surface 20318. The width between the lines connecting the vertices of the two arc edges of the locking block 2037 is smaller than the width of the first arc cavity 2031, so that the locking block can slide in the first arc cavity 2031. V-shaped positioning grooves 20310 are provided at both ends of the locking block. A second vertex 2039 is provided at the intersection of the positioning groove 20310 and the arc. Preferably, the second vertex is arc-shaped. The locking block 2037 and the first rotating shaft 2038 are fitted with a clearance fit so that the locking block 2037 can rotate freely on the outer cylindrical surface of the first rotating shaft 2038. In practical use, although the outer cylindrical surface of the adjusting locking shaft 203 is connected to the rotating plate 207 through a transition fit, that is, in the preferred embodiment, the outer circumference of the base plate 20316 is connected to the rotating plate 207 through a transition fit, and the center of the base plate 20316 is connected to the second rotating shaft 20317 through a transition fit, the tolerance of this transition fit is preferably between -0.005mm and +0.005mm. This can provide a certain friction force to act as a damping force to prevent the rotating plate from resetting, and can also make the rotating plate reset under the action of the reset spring of the brake line 8, so as to ensure that the air valve plug 104 of the gas spring 1 can be opened or closed smoothly. As the number of uses increases, this tolerance fit will gradually lose its function of providing damping force and limiting movement due to the increase in the number of friction cycles. Therefore, this invention provides... Figure 5 The preferred technical solution shown, in use, when the rotating plate 207 rotates, it drives the substrate 20316 to rotate around the second rotating axis 20317. For example, if... Figure 5Starting from the position of the locking block 2037, when the base plate 20316 rotates counterclockwise around the second rotating axis 20317, the third vertex 20312 will gradually contact the bottom of the locking block 2037, forming a torque to push the locking block 2037 to rotate. At the same time, the first vertex 2036 leaves the V-shaped positioning groove 20310 on the top of the locking block 2037. At this time, after the locking block 2037 rotates counterclockwise into the second arc-shaped cavity, the V-shaped positioning groove 20310 on the top of the locking block 2037 enters the space enclosed by the fifth limiting surface and the third vertex 20312. At this time, the locking block 2037 is located in the rotation path of the first arc-shaped cavity 2031. When the handle 5 is released, the return spring of the brake line 8 pushes the rotating plate 207 to drive the base plate 20316 to rotate clockwise. With the third vertex 20312 located below the locking block 2037, the locking block 2037 will not rotate. As the base plate 20316 rotates, before the third vertex 20312 disengages from below the locking block 2037, the first vertex 2036 rotates to the rotation trajectory of the locking block 2037, blocking reverse rotation and ensuring that the locking block 2037 smoothly enters the first arc-shaped cavity 2031. When the handle 5 is gripped again, the brake line pushes the rotating plate 207 to rotate the base plate 20316 counterclockwise. When the first vertex 2036 rotates to the top of the V-shaped positioning groove 20310, under the guidance of the third limiting surface 2035, the locking block 2037 rotates counterclockwise under its own gravity, causing the first vertex 2036 to enter the V-shaped positioning groove 20310 to form a... Figure 5 The locked state is shown; when it is necessary to release the lock, repeat the above actions; In Figure 5, angle C is the angle between the second limiting surface 2034 and the bottom of the first arc-shaped cavity 2031, used to limit the length of the first arc-shaped cavity 2031. Angle C is preferably 35° to 40°; angle A is the angle between the second limiting surface 2034 and the line connecting the second rotation axis 20317 and the first rotation axis 2038, used to determine the relative position between the first rotation axis 2038 and the second limiting surface 2034, and angle A is preferably 35° to 40°; angle B is the angle between the first limiting surface 2033 and the line connecting the second rotation axis 20317 and the first rotation axis 2038, used to determine the relative position between the first rotation axis 2038 and the first vertex 2036, and angle B is preferably 7° to 10°; angle D is the angle between the line connecting the second rotation axis 20317 and the first rotation axis 2038 and the line connecting the third vertex 20312 and the second rotation axis 20317, used to determine the relative position between the third vertex 20312 and the first rotation axis 2038, and angle D is preferably 25° to 30°. like Figure 6The diagram shows the structural principle of a self-locking gas spring. Self-locking gas springs are widely used in office chairs and sports equipment. With the help of release mechanisms, the gas spring can stop at any position during its stroke, and after stopping, it has a large locking force, even exceeding 10,000 N. When the valve plug 104 is pressed downwards, the high-pressure inert gas in the second cavity 106 passes through the gap between the bottom slope of the valve plug 104 and the second cavity 106 into the low-pressure first cavity 105. Since the bottom of the first cavity 105 is connected to the third cavity 107, the air pressure in the second cavity 106 decreases, and the inner piston 109 can smoothly move upwards under external pressure. The bottom of the inner piston 109 is fixed to the piston cylinder 103, thus pushing the piston rod 102 and the piston cylinder 103 together. Externally, this manifests as the piston rod 102 retracting downwards. When there is no external force, and the valve plug 104 is pressed downwards, even if the pressure in the second cavity 106 is the same as that in the first cavity 105, the pressure at the top and bottom of the inner piston 109 is greater than the pressure at the bottom, according to the gas pressure calculation formula. Therefore, the inner piston 109 is pushed downwards. The bottom of the inner piston 109 is fixed to the piston cylinder 103, thus pushing the piston rod 102 and the piston cylinder 103 apart, which manifests externally as the piston rod 102 extending upwards. In particular, the bottom of the valve plug 104 is conical, and the conical surface of the conical body seals with the cavity wall of the second cavity 106. The top of the valve plug 104 is provided with a boss to prevent the valve plug 104 from falling into the second cavity 106. like Figure 1 , Figure 3 and Figure 4 As shown, when the handle 5 is gripped or released, the brake line 8 pulls or resets the adjusting locking device 2, controlling the opening or closing of the air valve at the top of the gas spring 1, that is, controlling the opening or closing of the air valve plug 104 at the top of the piston rod in the gas spring 1. Since the second cavity 106 and the first cavity 105 inside the gas spring 1 are sealed with inert gas, when the air valve plug 104 is opened, the weight of the inclined column 9 is completely borne by the gas spring 1 when it rotates around the second hinge 401, and the operator only needs to provide the rotational torque. Compared with no gas spring, the operator does not need to bear the weight of the inclined column 9, thus making the folding feel smoother and less strenuous.

[0028] The foregoing has broadly outlined some aspects and features of the various embodiments and should be interpreted as merely illustrative of potential applications. Other beneficial results can be obtained by applying the disclosed information in different ways or by combining aspects of the disclosed embodiments. Further aspects and a more complete understanding can be obtained based on the detailed description of exemplary embodiments with reference to the accompanying drawings, within the scope defined by the claims.

[0029] The above embodiments provide a detailed description of the present invention. Of course, the above description is not intended to limit the present invention, nor is the present invention limited to the examples described above. Any changes, modifications, additions, reductions, or substitutions made by those skilled in the art within the scope of the present invention are also within the protection scope of the present invention.

Claims

1. A folding adjustment device for a treadmill, the folding adjustment device comprising a gas spring, the bottom of the gas spring being hinged to the end of the treadmill chassis, and the top of the gas spring being hinged to the inclined column of the treadmill via an adjusting lock, characterized in that, The adjusting locking device is connected to the handle at the top of the inclined column of the treadmill via a brake cable. The adjusting locking device has a rotating plate that is hinged to it with a transition fit. One end of the rotating plate is connected to the air valve at the top of the gas spring, and the other end is connected to the brake cable. When the handle is gripped or released, the brake cable pulls or resets the adjusting locking device, controlling the air valve at the top of the gas spring to open or close. The adjusting locking device includes an L-shaped fixing head; the corner of the L-shaped fixing head is provided with a hinge hole, and the hinge hole is fitted with a second hinge shaft for hinged together with the inclined column. The L-shaped fixing head has an adjusting locking shaft on the side of the fixing hole. The outer cylindrical surface of the adjusting locking shaft is connected to the rotating plate through a transition fit. The end of the rotating plate that contacts the valve plug of the air valve has a rotating inclined surface. The adjusting locking device includes the adjusting locking shaft. The adjusting locking shaft includes a base plate, the outer circumference of which is interference-fitted with the rotating plate, and the center of the base plate is connected to the second rotating shaft by a transition fit. The second rotating shaft is fixed at the position of the L-shaped fixing head located on the side of the fixing hole. A notch is provided on the lower side of the adjusting locking shaft, the notch including a first arc-shaped cavity and a second arc-shaped cavity. A first vertex is provided at the intersection of the first limiting surface and the seventh limiting surface, and a first rotating shaft is provided below the first vertex. A locking block is sleeved on the outer cylindrical surface of the first rotating shaft. The first arc-shaped plate and the seventh limiting surface form a first arc-shaped cavity; the first limiting surface, the sixth limiting surface, and the fifth limiting surface form a second arc-shaped cavity; a third vertex is provided on the outer side of the second arc-shaped cavity, and a fourth limiting surface is provided on the outer side of the third vertex, the fourth limiting surface being located within the inner side of the outer circle of the adjusting locking shaft; V-shaped positioning grooves are provided at both ends of the locking block.

2. The treadmill folding adjustment device according to claim 1, characterized in that, Two gas springs are provided, which are respectively installed between the inclined columns on both sides of the treadmill chassis and the treadmill chassis. The gas springs are hinged to the treadmill chassis through the first hinge shaft. The other end of the gas spring is connected to an adjusting lock, which is hinged to the upper middle part of the inclined column through the second hinge shaft.

3. The treadmill folding adjustment device according to claim 2, characterized in that, The bottom of the L-shaped fixing head has a fixing hole for fixing the piston rod of the gas spring.

4. The treadmill folding adjustment device according to claim 3, characterized in that, The other end of the rotating plate has a notch, and a brake head with a brake cable is engaged in the notch.

5. The treadmill folding adjustment device according to claim 4, characterized in that, The width between the lines connecting the vertices of the two arc edges of the locking block is less than the width of the first arc cavity, so that the locking block can slide within the first arc cavity.

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