CN110465045B - Four-controllable gas spring structure adjusting handrail double-mode running machine - Google Patents

Abstract

The invention relates to the field of treadmills, in particular to a four-controllable gas spring structure-adjusting handrail dual-mode running machine, which comprises a running machine main body and a handrail component movably connected with the running machine main body, wherein the handrail component comprises a handrail, an upright post and a connecting body, the running machine main body comprises a frame, a slide way is arranged in the middle of the frame, a sliding block corresponding to the connecting body is arranged in the slide way, a first controllable gas spring for driving the sliding block and a second controllable gas spring for rotating the connecting body are arranged in the frame, and the running machine further comprises a control device for controlling the locking and/or unlocking of the first controllable gas spring and the second controllable gas spring. Through the angle-adjustable armrest assembly, the running machine has multiple use modes of forward walking, backward walking and double walking and backward walking and running simultaneously.

Description

A treadmill with dual-mode adjustable handrails using four controllable gas spring structures

Technical Field

The invention relates to the field of treadmills, in particular to a treadmill with dual-modes of adjustable handrails using four controllable gas spring structures.

Background technique

The traditional treadmill is designed based on the normal movement posture of the human body. It transplants people's original outdoor sports into indoor areas, making it more convenient and expanding people's exercise space. Compared with outdoor sports, treadmills bring people more safety and comfort.

Modern medical research shows that walking backwards can exercise the lumbar spinal muscles, quadriceps, and muscles and ligaments around the ankle and knee joints, thereby adjusting the motor function of the spine and limbs and promoting blood circulation. Long-term persistence in walking backwards has a good auxiliary therapeutic effect on waist and leg pain, cramps, muscle atrophy, arthritis, etc. More importantly, since walking backwards is an unnatural way of activity, it can exercise the cerebellum's judgment of direction and coordination function of the human body. For teenagers, in order to maintain balance when walking backwards, the back spine must be stretched, which also has the effect of preventing hunchbacks.

Please refer to FIG. 1 . The Chinese utility model patent with publication number CN201823227U discloses a treadmill with reverse walking and easy folding functions, comprising a treadmill frame, frame columns, left and right handrails, a running belt, an electronic controller, a motor and other components, characterized in that: the treadmill frame (14) is movably connected to the frame columns (1) in an inclined L-shape, the connecting component is composed of a folding wrench (28), two steel wire ropes (11) and two limit pins (10), which are movably connected to the corresponding limit holes at the front end of the frame (14), the folding wrench (28) is arranged in the two handrail covers (3), and the two steel wire ropes (11) are respectively arranged in the two frame columns (1); the frame (14) is a flat rectangular frame, the front end of which is connected to the connecting frame (5) of the frame column (1), and the upper part of the connecting frame (5) is the upper cover (10) of the motor of the frame (14). 15), a pair of transport wheels (24) are arranged below the connecting frame (5), a motor (17) is connected to a front roller assembly (18) through a belt, a rear roller assembly (22) is arranged at the rear end of the frame (14), tension screw rods are arranged at the front and rear ends of the frame (14) to tighten the running belt (13) between the front roller assembly (18) and the rear roller assembly (22), a running board (12) is arranged in the middle of the running belt (13), the running board (12) and the frame (14) are fixedly connected by bolts, and two symmetrical frame foot pads (23) are arranged at the bottom of the rear end of the frame (14); the running belt (13) is made of a high elastic plastic material with anti-skid particles; the panel of the electronic controller (9) is provided with a display screen (26), a multi-option function key, a buzzer speaker, a safety latch (25), a pull rope ring (29) and a power switch (27).

The treadmill in the prior art has the defects that the frame columns cannot be adjusted in folding angle and the usage mode is single.

Summary of the invention

The present invention aims to provide a treadmill with a dual-mode of adjusting handrails with four controllable gas spring structures and multiple usage modes.

To achieve the above advantages, the present invention provides a treadmill with dual-mode adjustable handrails with four controllable gas spring structures, comprising a treadmill body, a handrail assembly dynamically connected to the treadmill body, the handrail assembly comprising a pair of columns, an handrail arranged between the upper ends of the pair of columns and a connector fixed to the lower ends of the columns, the treadmill body comprising a frame, characterized in that a slide is provided in the middle of the frame, a slider rotatably connected to the connector is provided in the slide, the frame is provided with a first controllable gas spring for driving the slider, and a second controllable gas spring for rotating the connector, and the treadmill also comprises a control device for controlling the locking and/or unlocking of the first controllable gas spring and the second controllable gas spring.

In one embodiment of the present invention, the first controllable gas spring is respectively connected and fixed to the frame and the slider, and the second controllable gas spring is respectively hinged to the frame and the lower part of the column.

In one embodiment of the present invention, the connecting body is provided with a rotating shaft with an adjustable angle, the slider is hinged to the connecting body through the rotating shaft, the rotating shaft is provided with a plurality of radial limiting notches, the slider is provided with a limiting column corresponding to the limiting notches, and a reset spring is provided at one end of the limiting column.

In one embodiment of the present invention, the treadmill body also includes a running belt and a motor located at the rear end of the running belt. The motor has a motor housing fixedly connected to a frame, and the motor housing is provided with a foot pedal flush with the upper surface of the running belt.

In one embodiment of the present invention, the control device includes a fixed sleeve threadedly connected to the piston rod, a drive block hinged to the inside of the fixed sleeve, a metal wire used to pull the drive block to squeeze the button, and a switch connected to the multiple metal wires, the switch includes a base connected and fixed to the frame and a pull ring hinged to the base, and the pull ring is provided with a rotating part connected and fixed to the end of the metal wire.

In one embodiment of the present invention, the treadmill is provided with a pair of rollers respectively hinged to the two ends of the frame, the treadmill is sleeved outside the pair of rollers, the motor is used to drive the rollers to rotate, and the motor is provided with a transmission belt connected to the rollers.

In one embodiment of the present invention, a running board for shock absorption is provided between a pair of the rollers.

In one embodiment of the present invention, the first controllable gas spring and the second controllable gas spring are both composed of a cylinder body and a piston rod, and a button is provided at the end of the piston rod.

In one embodiment of the present invention, the base is provided with an arc-shaped slide groove corresponding to the limiting column, and the arc-shaped slide groove can limit the rotation angle of the rotating part.

In one embodiment of the present invention, when the driving block presses the button, the first controllable gas spring and the second controllable gas spring are in an unlocked state; when the driving block releases the pressure on the button, the first controllable gas spring and the second controllable gas spring are in a locked state.

In the present invention, the treadmill has multiple usage modes such as forward walking, backward walking, two people walking forward and backward at the same time, and running through the handrail assembly with adjustable angle.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of a treadmill with reverse walking and easy folding functions in the prior art.

FIG2 is a schematic structural diagram of a treadmill with dual-mode adjustable handrails having four controllable gas spring structures according to a first embodiment of the present invention.

FIG. 3 is a front view of the treadmill with dual-mode adjustable handrails having four controllable gas spring structures as shown in FIG. 2 .

FIG. 4 is a bottom view of the motor housing of the treadmill with dual-mode adjustable handrails having four controllable gas spring structures as shown in FIG. 2 .

FIG. 5 is a schematic diagram showing the structure of the motor of the treadmill with dual-mode adjustable handrails having four controllable gas spring structures as shown in FIG. 2 .

FIG6 is a schematic cross-sectional view of the main body of the treadmill with dual-modes of the treadmill having four controllable gas spring structures and adjustable handrails of FIG2 .

FIG. 7 is a schematic structural diagram of the columns and slideway of the treadmill with dual-mode adjustable handrails of the four-controllable gas spring structure of FIG. 2 .

FIG8 is a schematic structural diagram of a connector and a slider of a treadmill with dual-mode adjustable handrails using four controllable gas spring structures as shown in FIG2 .

FIG. 9 is a schematic cross-sectional view of a slider of a treadmill with dual-mode adjustable handrails having four controllable gas spring structures as shown in FIG. 2 .

FIG. 10 is a schematic cross-sectional view of the connector and the slider of the treadmill with dual-mode adjustable handrails having four controllable gas spring structures of FIG. 2 .

FIG. 11 is an exploded view of the slider of the treadmill with dual-mode adjustable handrails having four controllable gas spring structures of FIG. 10 .

FIG. 12 is an exploded view of the connector of the treadmill with dual-mode adjustable handrails having four controllable gas spring structures of FIG. 10 .

FIG. 13 is a schematic cross-sectional view of the gas spring of the treadmill with dual-mode adjustable handrails of the four-controllable gas spring structure of FIG. 2 .

FIG. 14 is a partial enlarged view of the gas spring A of the treadmill with dual-mode adjustable handrails of the four-controllable gas spring structure of FIG. 13 .

FIG. 15 is a schematic diagram showing the structure of the switch and frame of the treadmill with dual-mode adjustable handrails using four controllable gas spring structures of FIG. 2 .

FIG. 16 is a schematic diagram showing the structure of a switch of a treadmill with dual-mode adjustable handrails having four controllable gas spring structures as shown in FIG. 2 .

FIG. 17 is a top view of the switch of the treadmill with dual-mode adjustable handrails having four controllable gas spring structures shown in FIG. 16 .

FIG. 18 is a right side view of the switch of the treadmill with dual-mode adjustable handrails having four controllable gas spring structures shown in FIG. 16 .

FIG. 19 is a left view of the switch of the treadmill with dual-mode adjustable handrails having four controllable gas spring structures shown in FIG. 16 .

FIG. 20 is a schematic structural diagram of a frame of a treadmill with dual-mode adjustable handrails using four controllable gas spring structures according to a second embodiment of the present invention.

FIG. 21 is a schematic diagram showing the structure of the switch of the treadmill with dual-mode adjustable handrails having four controllable gas spring structures shown in FIG. 20 .

FIG. 22 shows a front view of the treadmill with dual-mode adjustable armrests of FIG. 20 when folded at 0°.

FIG. 23 shows a front view of the treadmill with dual-mode adjustable handrails of FIG. 20 with four controllable gas spring structures when folded 82°.

FIG. 24 shows a front view of the treadmill with dual-mode adjustable handrails of FIG. 20 with four controllable gas spring structures when folded 120°.

FIG. 25 shows a front view of the treadmill with dual-mode adjustable armrests of FIG. 20 with four controllable gas spring structures when folded 20°.

FIG. 26 is a schematic structural diagram of a connector and a slider of a treadmill with dual-mode adjustable handrails using four controllable gas spring structures according to the third embodiment of the present invention.

FIG. 27 is a schematic structural diagram of a slider of a treadmill with dual-mode adjustable handrails having a four-controllable gas spring structure according to the fourth embodiment of the present invention.

FIG. 28 is a schematic structural diagram of a treadmill with dual-mode adjustable handrails having four controllable gas spring structures according to the fifth embodiment of the present invention.

Detailed ways

In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the specific implementation method, structure, characteristics and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

Please refer to Figures 2, 3, 4 and 5. The treadmill with dual-mode adjustable handrails of the first embodiment of the present invention includes a treadmill body 1 and an handrail assembly 2 dynamically connected to the treadmill body 1. It is characterized in that the treadmill body 1 includes a running belt 11 and a motor 12 located at the rear end of the running belt 11. The motor 12 has a motor housing 13 outside, and the motor housing 13 is provided with a foot pedal 131 flush with the upper surface of the running belt 11. The motor housing 13 has a heat dissipation hole 132 at the bottom, and the heat dissipation hole 132 is used to dissipate heat from the motor 12. The motor housing 13 also has a control circuit board 133 for controlling the motor 12.

The treadmill body 1 further includes a frame 14 connected and fixed to the motor housing 13, and an anti-skid pad 141 is provided on the upper surface of the frame 14. The motor housing 13 is located on both sides of the footrest 131 and is flush with the anti-skid pad 141. A frame seat 145 is fixed to the bottom of the front end of the frame 14, and the frame seat 145 and the motor housing 13 are also used to support the treadmill.

Please refer to Fig. 6, the running belt 11 is provided with a pair of rollers 15 respectively hinged to the two ends of the frame 14, the running belt 11 is sleeved outside the pair of rollers 15, the motor 12 is used to drive the rollers 15 to rotate, and the motor 12 is provided with a transmission belt 121 connected to the rollers 15. A running board 16 for shock absorption is provided between the pair of rollers 15.

Please refer to Figures 7, 8 and 9. The armrest assembly 2 includes an armrest 21, a column 22, and a connector 23 located at the lower end of the column 22. The connector 23 is provided with an adjustable angle rotation shaft 231, and the rotation shaft 231 is provided with a plurality of radial limiting notches 232. A slideway 143 is provided in the middle of the frame 14. A slider 17 rotatably connected to the connector 23 is provided in the slideway 143. The slider 17 is hinged to the connector 23 through the rotation shaft 231. The slider 17 is provided with a limiting column 171 corresponding to the limiting notch 232, and a return spring 172 is provided at one end of the limiting column 171. When the limiting column 171 is partially accommodated in the limiting notch 232, the resistance to the rotation of the rotating shaft 231 is increased; when the limiting column 171 is squeezed out of the limiting notch 232, the resistance to the rotation of the rotating shaft 231 is reduced. In the process of rotating the connector 23, the sound and damping generated by the rotating shaft 231 help to accurately adjust the angle.

A sliding hole 23 a corresponding to the connecting body 23 is formed on the outer side of the frame 14 . The sliding hole 23 a is used for the rotating shaft 231 to move along the length direction of the frame 14 .

The armrest 21 is provided with a display screen electrically connected to the control circuit board 133, and the display screen is used to display the speed, time and mileage of the running belt.

Please refer to Figures 10, 11 and 12. The slider 17 includes a slider body 17a and a first nylon sleeve 18a and a second nylon sleeve 18b located in the slider body 17a. The first nylon sleeve 18a and the second nylon sleeve 18b both have a conical surface a in contact with the inner wall of the slider body 17a.

The slider body 17a is provided with a first shaft groove 17b and a second shaft groove 17c corresponding to the first nylon sleeve 18a and the second nylon sleeve 18b, respectively. A stopper 17d is provided between the first shaft groove 17b and the second shaft groove 17c. A detachable snap ring 19a is provided at the end of the rotating shaft 231. The end of the rotating shaft 231 facing away from the snap ring 19a has a stopper 231a. The two ends of the first nylon sleeve 18a correspond to the stopper 17d and the stopper 231a, respectively. The two ends of the second nylon sleeve 18b correspond to the stopper 17d and the snap ring 19a, respectively. The rotating shaft 231 is provided with a stopper groove 20a that can accommodate part of the snap ring 19a.

The first nylon sleeve 18a and the second nylon sleeve 18b are both made of nylon, which has the advantages of wear resistance, high mechanical strength, good chemical stability, and light weight. The inner diameter of the first nylon sleeve 18a is larger than the inner diameter of the second nylon sleeve 18b. The conical surfaces a of the first nylon sleeve 18a and the second nylon sleeve 18b are both inclined inwardly toward the slider body 17a. The inner walls of the first nylon sleeve 18a and the second nylon sleeve 18b fit the outer wall of the rotating shaft 231, so that there is a gap between the rotating shaft 231 and the slider body 17a. The nylon sleeve is used to reduce the friction between the rotating shaft 231 and the slider 17.

During the installation of the armrest assembly 2, firstly, the first nylon sleeve 18a and the second nylon sleeve 18b in the slider body 17a are placed in the first shaft groove 17b and the second shaft groove 17c. When placed, the first nylon sleeve 18a and the second nylon sleeve 18b have their conical surfaces a facing the slider body 17a, which facilitates installation. Then, the rotating shaft 231 is inserted into the slider 17, so that the limiting ring 231a of the rotating shaft 231 limits the axial movement of the first nylon sleeve 18a along the rotating shaft 231. Finally, the retaining ring 19a is fixed in the retaining groove 20a to limit the axial movement of the second nylon sleeve 18b, and also limits the axial movement of the rotating shaft 231, thereby completing the installation.

During the process of rotating the connecting body 23, the rotating shaft 231 is hinged to the slider 17 through the first nylon sleeve 18a and the second nylon sleeve 18b, and a certain gap is maintained between the rotating shaft 231 and the slider body 17a, thereby reducing the wear of the rotating shaft 231 and the slider 17, so that the treadmill has the beneficial effects of being quiet, smooth and not easy to damage when folded.

Please refer to FIG. 10 , the frame 14 includes a first controllable gas spring 3 for driving the slider 17, one end of the first controllable gas spring 3 is connected and fixed to the frame 14, and the other end of the first controllable gas spring 3 is connected and fixed to the slider 17. The frame 14 also includes a second controllable gas spring 3a hinged to the bottom of the frame 14 and the bottom of the column 22 close to the connecting body 23, and the second controllable gas spring 3a is used to drive the column 22 to rotate the connecting body 23.

The first controllable gas spring 3 and the second controllable gas spring 3a are both composed of a cylinder body 31 and a piston rod 32, and a button 33 is provided at the end of the piston rod 32. The piston rod 32 of the second controllable gas spring 3a is provided with a first connecting piece 321, and the piston rod 32 is hinged to the frame 14 through the first connecting piece 321, and the cylinder body 31 of the second controllable gas spring 3a is provided with a second connecting piece 311, and the cylinder body 31 is hinged to the column 22 through the second connecting piece 311.

Please refer to Figures 13 and 14. The treadmill also includes a control device 4 for controlling the locking and/or unlocking of the first controllable gas spring 3 and the second controllable gas spring 3a. The control device 4 includes a fixing sleeve 41 threadedly connected to the piston rod 32, a driving block 42 hinged inside the fixing sleeve 41, and a metal wire 43 for pulling the driving block 42 to squeeze the button 33. The metal wire 43 is connected and fixed to one end of the driving block 42. The fixing sleeve 41 is provided with a first through hole 411 corresponding to the metal wire 43.

Please refer to Figures 15, 16, 17, 18 and 19. The control device 4 also includes a switch 5 connected to a plurality of metal wires 43. The switch 5 includes a base 51 connected and fixed to the frame 14 and a pull ring 52 hinged to the base 51. The pull ring 52 is hinged to the base 51 through a limiting column 521 located at the end. The pull ring 52 is provided with a rotating portion 522 connected and fixed to the end of the metal wire 43. The rotating portion 522 can rotate radially along the axis of the limiting column 521. The base 51 is provided with an arc-shaped slide groove 512 corresponding to the limiting column 521. The arc-shaped slide groove 512 can limit the rotation angle of the rotating portion 522.

The base 51 has four second through holes 511 on both sides corresponding to the plurality of metal wires 43. A tension spring 523 is provided between the middle of the pull ring 52 and the base 51 to keep the pull ring 52 close to the base 51 and reset the rotating part 522.

When the pull ring 52 is pulled, the rotating part 522 drives the metal wire 43 to move, and the indirect metal wire 43 causes the driving block 42 to squeeze the button 33, thereby simultaneously unlocking the first controllable gas spring 3 and the second controllable gas spring 3a. When the pull ring 52 is released, the tension spring 523 resets the rotating part 522, thereby automatically locking the first controllable gas spring 3 and the second controllable gas spring 3a.

When the driving block 42 presses the button 33, the first controllable gas spring 3 and the second controllable gas spring 3a are in an unlocked state; when the driving block 42 releases the pressure on the button 33, the first controllable gas spring 3 and the second controllable gas spring 3a are in a locked state.

During the process of folding or unfolding the armrest assembly 2, the metal wire 43 is pulled by the pull ring 52, so that the driving block 42 squeezes the button 33. At this time, the first controllable gas spring 3 and the second controllable gas spring 3a are unlocked at the same time, and then the angle of the column 22 relative to the frame 14 can be adjusted. The armrest 21 is pushed or pulled to rotate the column 22 to a suitable position. The pull ring 52 is released, and the button 33 automatically rebounds under the action of the internal pressure of the cylinder body 31. The first controllable gas spring 3 and the second controllable gas spring 3a are locked at the same time, thereby limiting the rotation of the column 22.

The treadmill includes a treadmill body 1, an armrest assembly 2 movably connected to the treadmill body 1, the armrest assembly 2 includes an armrest 21, a column 22, and a connector 23, the treadmill body 1 includes a frame 14, a slideway 143 is provided in the middle of the frame 14, a slider 17 corresponding to the connector 23 is provided in the slideway 143, the frame 14 is provided with a first controllable gas spring 3 for driving the slider 17, and a second controllable gas spring 3a for rotating the connector 23, the first controllable gas spring 3 and the second controllable gas spring 3a are both composed of a cylinder body 31 and a piston rod 32, and a button 33 is provided at the end of the piston rod 32, and the treadmill also includes a control device 4 for controlling the locking and/or unlocking of the first controllable gas spring 3 and the second controllable gas spring 3a.

Please refer to Figures 20 and 21. In the second embodiment of the present invention, a teardrop-shaped frame cover 142 is fixed to the front end of the frame 14, and a pull-ring switch 5 is provided below the frame 14 near the slide 143.

The switch 5 includes a circular ring 5a and a central block 5b fixed to the frame 14. The central block 5b uses four pulling holes 5c corresponding to the metal wire 43. The first controllable gas spring 3 and the second controllable gas spring 3a are unlocked by pulling the circular ring 5a. After releasing the circular ring 5a, the first controllable gas spring 3 and the second controllable gas spring 3a are reset under the action of their own air pressure and locked.

Please refer to Figures 22, 23, 24 and 25. When the first controllable gas spring 3 is fully extended and the second controllable gas spring 3a is fully compressed, the frame 14 and the column 22 are at 0°, and the rotation axis 231 is located at the front end of the slide hole 23a, and the handrail 21 overlaps with the frame 14. At this time, the treadmill is in a horizontal storage state; when the first controllable gas spring 3 is fully compressed and the second controllable gas spring 3a is fully extended, the frame 14 and the column 22 are at 120°, and the rotation axis 231 is located at the front end of the slide hole 23a. 3a rear end, the handrail 21 is above the front part of the frame 14, and the treadmill is in a running state; when the first controllable gas spring 3 is partially compressed or extended and the second controllable gas spring 3a is partially compressed or extended, the frame 14 and the column 22 are at 82°, and the handrail 21 is above the middle part of the frame 14, and the treadmill is in an intermediate walking and/or backward walking state; when the frame 14 and the column 22 are at 20°, and the handrail 21 is above the rear part of the frame 14, the treadmill is in an upright storage state.

During use, for example, when the frame 14 and the upright 22 are at 82°, and the handrail 21 is above the middle of the frame 14, the treadmill can be used for both backward and forward walking. Two users are respectively on both sides of the handrail 21. After starting the motor, one user walks forward and the other user walks backward. During the forward walking process, the user who is walking forward can avoid the danger caused by hitting the heel because the foot pedal 131 is flush with the upper surface of the running belt 11. The foot pedal 131 can also prevent the user from stepping on air, ensuring the user's safety. For the user who is walking backward, since the motor is rear-mounted and there is no foot pedal 131, the heel will not be blocked during the backward walking process, avoiding the possible fall caused by different friction forces on the foot surface.

During the process of folding or unfolding the armrest assembly 2, the metal wire 43 is pulled through the switch 5 to make the driving block 42 squeeze the button 33. At this time, the first controllable gas spring 3 and the second controllable gas spring 3a are unlocked at the same time, and then the angle of the column 22 relative to the frame 14 can be adjusted. The armrest 21 is pushed or pulled to rotate the column 22 to a suitable position, and the metal wire 43 is released. The button 33 automatically rebounds under the action of the internal pressure of the cylinder body 31, and the first controllable gas spring 3 and the second controllable gas spring 3a are locked at the same time, thereby limiting the rotation of the column 22.

Please refer to Fig. 26, in the third embodiment of the present invention, the end of the rotating shaft 231 is provided with an external thread, and a nut 2311 is provided between the second nylon sleeve 18b and the retaining ring 19a, and the nut 2311 can be threadedly connected with the rotating shaft 231. The nut 2311 makes the rotating shaft 231 and the slider more tightly connected.

Referring to Fig. 27, in the fourth embodiment of the present invention, there are two limiting notches 232, and the angle between adjacent limiting notches 232 is 30°. In the process of rotating the column 22, fewer limiting notches 232 help determine the angle and avoid frequent angle adjustments.

Please refer to FIG. 28 . In the fifth embodiment of the present invention, the treadmill body 1 further comprises a pair of elastic ropes 6 detachably connected to the ends of the motor housing 13, and a U-shaped limit plate 7 for fixing the toes. The ends of the elastic ropes 6 are provided with a gripping portion 61 for gripping, and the U-shaped limit plate 7 is made of plastic. The U-shaped limit plate 7 has an elastic portion 71 that is easily deformed.

During use, the treadmill can not only realize the functions of forward walking, backward walking, running, and forward and backward walking at the same time, but also perform strength training through the elastic rope 6. For example, the user holds the grip 61 to perform lateral raise training, thereby stimulating the triceps of the arm.

Sit-ups can be performed by using the U-shaped limit plate 7. First, the user lies flat on the ground, bends the knees, and then presses the sole of the foot against the motor housing 13. At the same time, the toes press the elastic part 61 of the U-shaped limit plate 7 to deform the elastic part 61, thereby fixing the entire sole of the foot, and finally the exercise can be started. The treadmill can also perform push-ups. The user only needs to support the palm of the hand on one end of the frame 14 to perform push-ups.

In the present invention, the rear motor is used to enable the treadmill to have the beneficial effects of simultaneously running forward and backward, and the backward running is safer.

In the present invention, the slider is hinged to the connector via the rotating shaft, so that the treadmill has the beneficial effect of being able to adjust the column angle and the position of the handrail.

In the present invention, the unlocking and locking of the gas spring are controlled by a switch, so that the treadmill has the beneficial effects of controllable folding angle and good fixing effect of the handrail assembly.

In the present invention, the first nylon bushing and the second nylon bushing with conical surfaces make it easier to install or repair the slider, and at the same time make the rotating shaft and the slider more closely combined, and have the beneficial effects of being silent, smooth and not easy to be damaged during rotation.

In the present invention, by means of a pair of elastic ropes and a U-shaped limiting plate respectively connected and fixed to the ends of the motor housing, the treadmill has the beneficial effects of diversified functions and good exercise effects.

In the present invention, the treadmill has multiple usage modes such as forward walking, backward walking, two people walking forward and backward at the same time, and running through the handrail assembly with adjustable angles.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims (4)

1. A treadmill with a dual-mode adjustable handrail structure of four controllable gas springs, comprising: a treadmill body, a handrail assembly dynamically connected to the treadmill body, the handrail assembly comprising a pair of columns, a handrail arranged between the upper ends of the pair of columns and a connector fixed to the lower ends of the columns, the treadmill body comprising a frame, characterized in that a slideway is provided in the middle of the frame, a slider rotatably connected to the connector is provided in the slideway, the frame is provided with a first controllable gas spring for driving the slider, and a second controllable gas spring for rotating the connector, the treadmill further comprising a control device for controlling the locking and/or unlocking of the first controllable gas spring and the second controllable gas spring; the first controllable gas spring and the second controllable gas spring are both composed of a cylinder body and a piston rod, and a button is provided at the end of the piston rod; The connector is provided with a rotating shaft with adjustable angle, the slider is hinged to the connector via the rotating shaft, the rotating shaft is provided with a plurality of radial limiting notches, the slider is provided with a limiting column corresponding to the limiting notch, and one end of the limiting column is provided with a return spring; when the limiting column is partially accommodated in the limiting notch, the resistance to the rotation of the rotating shaft is increased; when the limiting column is squeezed out of the limiting notch, the resistance to the rotation of the rotating shaft is reduced; in the process of rotating the connector, the sound and damping generated by the rotating shaft are conducive to the precise adjustment of the angle; The slider includes a slider body and a first nylon sleeve and a second nylon sleeve located in the slider body, wherein the first nylon sleeve and the second nylon sleeve both have a conical surface in contact with the inner wall of the slider body; The slider body is respectively provided with a first shaft groove and a second shaft groove corresponding to the first nylon sleeve and the second nylon sleeve, a limiting portion is provided between the first shaft groove and the second shaft groove, a detachable clamping ring is provided at the end of the rotating shaft, and a limiting ring is provided at one end of the rotating shaft facing away from the clamping ring, the two ends of the first nylon sleeve respectively correspond to the limiting portion and the limiting ring, and the two ends of the second nylon sleeve respectively correspond to the limiting portion and the clamping ring; the rotating shaft is provided with a clamping groove that can accommodate part of the clamping ring; The first nylon sleeve and the second nylon sleeve are both made of nylon; the inner diameter of the first nylon sleeve is larger than the inner diameter of the second nylon sleeve; the conical surfaces of the first nylon sleeve and the second nylon sleeve are both inclined inwardly of the slider body; the inner walls of the first nylon sleeve and the second nylon sleeve fit the outer wall of the rotating shaft, so that there is a gap between the rotating shaft and the slider body; During the installation of the handrail assembly, firstly, the first nylon sleeve and the second nylon sleeve in the slider body are placed in the first shaft groove and the second shaft groove, with the conical surfaces of the first nylon sleeve and the second nylon sleeve facing the slider body; then, the rotating shaft is inserted into the slider, so that the limiting ring of the rotating shaft limits the axial movement of the first nylon sleeve along the rotating shaft; finally, the retaining ring is fixed in the retaining groove to complete the installation; In the process of rotating the connecting body, the rotating shaft is hinged to the slider through the first nylon sleeve and the second nylon sleeve, and a certain gap is maintained between the rotating shaft and the slider body; The first controllable gas spring is respectively connected and fixed to the frame and the slider, and the second controllable gas spring is respectively hinged to the frame and the lower part of the column; The control device comprises a fixing sleeve threadedly connected to the piston rod, a driving block hinged inside the fixing sleeve, a metal wire for pulling the driving block to squeeze the button, and a switch connected to the plurality of metal wires, wherein the switch comprises a base connected and fixed to the frame and a pull ring hinged to the base, wherein the pull ring is provided with a rotating part connected and fixed to the end of the metal wire; the rotating part rotates radially along the axis of the limiting column, and the base is provided with an arc-shaped slide groove corresponding to the limiting column, and the arc-shaped slide groove limits the rotation angle of the rotating part; A tension spring is provided between the middle of the pull ring and the base, and the tension spring is used to keep the pull ring close to the base at all times so as to reset the rotating part; When the pull ring is pulled, the rotating part drives the metal wire to move, and the indirect metal wire causes the driving block to squeeze the button, thereby simultaneously unlocking the first controllable gas spring and the second controllable gas spring; when the pull ring is released, the tension spring resets the rotating part, thereby automatically locking the first controllable gas spring and the second controllable gas spring; When the driving block presses the button, the first controllable gas spring and the second controllable gas spring are in an unlocked state; when the driving block releases the pressure on the button, the first controllable gas spring and the second controllable gas spring are in a locked state; During the process of folding or unfolding the armrest assembly, the metal wire is pulled by the pull ring to cause the drive block to squeeze the button. At this time, the first controllable gas spring and the second controllable gas spring are unlocked at the same time, and then the angle of the column relative to the frame is adjusted. The armrest is pushed or pulled to rotate the column to a suitable position. The pull ring is released, and the button automatically rebounds under the action of the internal pressure of the cylinder. The first controllable gas spring and the second controllable gas spring are locked at the same time, thereby limiting the rotation of the column. 2. The treadmill with dual-mode adjustable armrests with four controllable gas spring structures according to claim 1 is characterized in that the treadmill body also includes a running belt and a motor located at the rear end of the running belt, the motor has a motor housing connected and fixed to a frame, and the motor housing is provided with a foot pedal flush with the upper surface of the running belt. 3. The treadmill with dual-mode adjustable armrests with four controllable gas spring structures according to claim 2 is characterized in that the running belt is provided with a pair of rollers respectively hinged to the two ends of the frame, the running belt is sleeved outside the pair of rollers, the motor is used to drive the rollers to rotate, and the motor is provided with a transmission belt connected to the rollers. 4. The treadmill with dual-mode adjustable handrails with four controllable gas spring structures according to claim 3, characterized in that a running board for shock absorption is provided between a pair of the rollers.