DE102019107571A1 - FLAP DEVICE OF A TREADMILL WITH A LOCKING FUNCTION AND METHOD OF USE THEREOF - Google Patents

Abstract

A folding device of a treadmill with a locking function consists of a treadmill deck (1), a first upright bar (3), a control panel (2) and a first lockable telescopic mechanism (5). The control panel (2) is mounted on an upper end of the first upright bar (3). A lower end of the first upright bar (3) is movably mounted on one side of the treadmill deck (1). The first lockable telescopic mechanism (5) is mounted between a middle part of the first upright bar (3) and the side of the treadmill deck (1). The first upright bar (3), the treadmill deck (1) and the first lockable telescoping mechanism (5) together form a triangular shape when the first lockable telescopic mechanism (5) is extended. The first upright bar (3) is parallel or approximately parallel to the treadmill deck (1) when the first telescoping telescopic mechanisms (5) are retracted.

Description

The present invention relates to a treadmill, more particularly to a treadmill of a treadmill having a barrier function and a method of using the same.

A treadmill is a common fitness machine for a family or for use in a gym. It is the simplest home gym equipment and proves to be the best choice of home fitness equipment. The upright bars of existing treadmills are generally permanently fixed, can not be folded and stored, and are quite bulky when not in use. The design of the treadmill proves to be careless and impractical.

In view of the above-mentioned disadvantages of the prior art, the main object of the present invention is to provide a folding apparatus of a treadmill having a lock function and a method of using the same.

According to one aspect of the present invention, a folding apparatus of a treadmill having a barrier function is provided. The treadmill of the treadmill includes a treadmill deck, a first upright pole, a control panel and a first lockable telescoping mechanism. The control panel is mounted on an upper end of the first upright bar. A lower end of the first upright bar is movably mounted on one side of the treadmill deck. The first upright bar is rotatable fore and aft relative to the treadmill deck. The first lockable telescopic mechanism is mounted between a central portion of the first upright pole and the side of the treadmill deck. The first upright bar, the treadmill deck, and the first lockable telescoping mechanism form a triangular shape when the first telescoping telescoping mechanisms are extended. The first upright pole is parallel or approximately parallel to the treadmill deck when the first telescoping telescoping mechanisms are retracted.

Preferably, the folding device of the treadmill further comprises a second lockable telescopic mechanism. A rear end of the control panel is movably attached to the upper end of the first upright bar. The control panel can be rotated forward and backward relative to the first upright pole. The second lockable telescopic mechanism is fixed with a hinge between a lower side of a middle part of the control panel and a front side of a middle part of the first upright bar.

Alternatively, the folding device of the treadmill further comprises a second lockable telescopic mechanism. A front end of the control panel is movably attached to the upper end of the first upright bar. The control panel can be rotated forward and backward relative to the first upright pole. The second lockable telescopic mechanism is fixed with a hinge between a bottom of a central part of the control panel and a back of the middle part of the first upright bar.

Preferably, the folding device of the treadmill further comprises a second upright pole. A front end of the control panel is movably attached to the upper end of the first upright bar. The control panel can be rotated forward and backward relative to the first upright pole. The second upright bar is hinged between a central part of the control panel and the side of the treadmill deck. The treadmill deck, control panel, first upright bar, and second upright bar together form a parallelogram-shaped mechanism.

Alternatively, the folding device of the treadmill further comprises a second upright pole. A central part of the control panel is movably attached to the upper end of the first upright bar. The control panel can be rotated forward and backward relative to the first upright pole. The second upright bar is attached with a hinge between a front panel of the control panel and the side of the treadmill deck. The treadmill deck, control panel, first upright bar, and second upright bar together form a parallelogram-shaped mechanism.

Preferably, the first lockable telescopic mechanism consists essentially of a gas spring with self-locking traction, a hydraulic cylinder, a pneumatic cylinder and an electric operating rod.

Preferably, the second lockable telescopic mechanism has a gas spring with self-locking traction, a hydraulic cylinder, a pneumatic cylinder and an electric operating rod.

Preferably, the gas spring with self-locking traction consists essentially of a cylinder jacket, a piston, a piston rod, a needle valve and an end cap. The piston is mounted in the cylinder jacket. The piston is sealed and slidably mounted in the cylinder jacket. The end cap is mounted on an opening of the cylinder jacket. The piston is securely attached to an inner end of the piston rod. The piston rod protrudes from a hole in the Center of the end cap to the outside. A sealing ring is mounted between an outer side wall of the piston rod and an inner side wall of the end cap. A rodless chamber of the cylinder jacket is coated with oil. In a piston rod chamber of the cylinder jacket gas is filled. The needle valve is located in the piston rod. A valve of the needle valve is mounted on the piston. A switch of the needle valve is provided at an outer end of the piston rod.

Preferably, the switch is an eccentric rotary switch. The eccentric rotary switch consists essentially of a rotary handle and a cam. The cam is rotatably mounted on the outer end of the piston rod. The turning handle is securely attached to the cam. With the cam, a needle stick of the needle valve is driven to move up and down.

According to another aspect of the present invention, a method of using the treadmill folding device is provided. This method includes (1) flipping down: releasing the first lockable telescoping mechanism and retracting the first lockable telescoping mechanism to rotate and collapse the first upright bar relative to the treadmill deck to a final condition for storage; (2) Fold Up: Extending the First Lockable Telescope Mechanism to Automatically Fold the First Upright Pole to a Final Condition and Lock the First Lockable Telescope Mechanism.

1. 1. Bei der vorliegenden Erfindung kommen die Eigenschaften zur Anwendung, dass der arretierbare Teleskopmechanismus ausstreckbar und einziehbar ist und durch Drehen der Griffe des Schalters geregelt werden kann, damit das Laufband praktischer und flexibel ist, um dieses zusammenzuklappen und aufzubewahren und mit dem Schalter arretiert werden kann, um die Sicherheitsanforderungen der Tragfähigkeit der gesamten Vorrichtung zu erfüllen. Beim Aufklappen erweist es sich stabiler und zuverlässiger, wobei es nach dem Zusammenklappen platzsparend aufbewahrt und dadurch ebenfalls Verpackungsmaterial eingespart werden kann.
2. 2. Die ersten aufrechten Stangen und die zweiten aufrechten Stangen sind nach dem Zusammenklappen und Aufbewahren in einem festen ausgeglichenen Zustand. Selbst bei Vibrationen, die beim Transportieren der Vorrichtung auftreten, werden keine Geräusche durch die Vibrationen durch die ersten aufrechten Stangen, die zweiten aufrechten Stangen und durch die Steuertafel verursacht.

According to the technical characteristics described above, the following effects can be obtained:

1. 1. In the present invention, the features apply that the lockable telescopic mechanism is extendable and retractable and can be controlled by rotating the handles of the switch to make the treadmill more practical and flexible to collapse and store and lock with the switch can meet the safety requirements of the carrying capacity of the entire device. When unfolding it proves to be more stable and reliable, and it saves space after folding and thus also packaging material can be saved.
2. 2. The first upright bars and the second upright bars are in a fixed balanced state after folding and storing. Even with vibrations that occur when transporting the device, no noise is caused by the vibrations by the first upright bars, the second upright bars and by the control panel.

• 1 eine schematische Ansicht nach einem ersten Ausführungsbeispiel der vorliegenden Erfindung;
• 2 eine perspektivische Ansicht nach dem ersten Ausführungsbeispiel der vorliegenden Erfindung in einem nicht geklappten Zustand;
• 3 eine Seitenansicht nach dem ersten Ausführungsbeispiel der vorliegenden Erfindung in einem nicht geklappten Zustand;
• 4 eine perspektivische Ansicht nach dem ersten Ausführungsbeispiel der vorliegenden Erfindung in einem geklappten Zustand;
• 5 eine Seitenansicht nach dem ersten Ausführungsbeispiel der vorliegenden Erfindung in einem geklappten Zustand;
• 6 eine schematische Ansicht zum Darstellen der externen Struktur der Gasfeder mit selbstsperrender Traktion;
• 7 eine schematische Ansicht zum Darstellen der Drehung des Schalters der Gasfeder mit selbstsperrender Traktion;
• 8 eine schematische Ansicht zum Darstellen der internen Struktur der Gasfeder mit selbstsperrender Traktion;
• 9 eine schematisch Ansicht nach einem zweiten Ausführungsbeispiel der vorliegenden Erfindung;
• 10 eine schematische Ansicht nach einem dritten Ausführungsbeispiel der vorliegenden Erfindung; und
• 11 eine schematische Ansicht nach einem vierten Ausführungsbeispiel der vorliegenden Erfindung.

In the following the invention with reference to preferred embodiments with reference to the drawings will be described in detail. In the drawing shows:

• 1 a schematic view of a first embodiment of the present invention;
• 2 a perspective view according to the first embodiment of the present invention in an unfolded state;
• 3 a side view according to the first embodiment of the present invention in an unfolded state;
• 4 a perspective view according to the first embodiment of the present invention in a folded state;
• 5 a side view according to the first embodiment of the present invention in a folded state;
• 6 a schematic view showing the external structure of the gas spring with self-locking traction;
• 7 a schematic view showing the rotation of the switch of the gas spring with self-locking traction;
• 8th a schematic view showing the internal structure of the gas spring with self-locking traction;
• 9 a schematic view according to a second embodiment of the present invention;
• 10 a schematic view of a third embodiment of the present invention; and
• 11 a schematic view of a fourth embodiment of the present invention.

The 1 to 8th show that a folding device of the treadmill with a locking function according to a first preferred embodiment of the present invention, a treadmill deck 1 , several first upright poles 3 , a control panel 2 , two first lockable telescopic mechanisms 5 and two second lockable telescopic mechanisms 4 includes. The control panel 2 is at the upper ends of the first upright poles 3 assembled. The lower ends of the first upright bars 3 are ever movable on one of the two sides of the treadmill deck 1 attached. The first upright rods 3 Can be relative to the treadmill deck 1 be rotated forwards and backwards. The first lockable telescopic mechanisms 5 are ever symmetrical between the middle parts of the first upright rods 3 and one of the two sides of the treadmill deck 1 attached. A corresponding first upright poles 3 , the treadmill deck 1 and the corresponding first lockable telescopic mechanisms 5 together form a triangular shape when the first lockable telescopic mechanisms 5 moved out to the first upright poles 3 to set up stable after unfolding. The first upright bars 3 are parallel or approximately parallel to the treadmill deck 1 arranged when the first lockable telescopic mechanisms 5 are retracted.

In the first embodiment, the lower ends of the first upright bars 3 with hinges on each one of the two sides of the front of the treadmill deck 1 attached. The first lockable telescopic mechanisms 5 are hinged between the backs of the middle parts of the first upright poles 3 and one of the two sides of the middle part of the treadmill deck 1 attached. The back end of the control panel 2 is movable at the upper ends of the first upright bars 3 fastened while the control panel 2 relative to the first upright bars 3 can be rotated forwards and backwards. The second lockable telescopic mechanisms 4 are symmetrical with hinges between the bottom of the middle part of the control panel 2 and one each of the front sides of the middle parts of the first upright bars 3 attached.

In the first embodiment, the first lockable telescopic mechanisms 5 and the second lockable telescopic mechanisms as in 8th shown used as gas springs with self-locking tractions. Of course, the telescopic mechanism with a lock function can be used, for example, as a hydraulic cylinder, a pneumatic cylinder or as an electric operating rod. This embodiment will be described by illustrating the first lockable telescopic mechanism 5. The gas spring is used with self-locking traction, but not on the following structure, including a cylinder jacket 91 , a piston 92 , a piston rod 93 , a needle valve and a graduation cap 94 , is limited. The piston 92 is in the cylinder jacket 91 mounted while the piston 92 sealed and sliding in the cylinder jacket 91 is mounted. The graduation cap 94 is on an opening of the cylinder jacket 91 assembled. The piston 92 is safe at the inner end of the piston rod 93 attached. The piston rod 93 sticks out of a hole in the middle of the end cap 94 outward. A sealing ring 96 is between an outer side wall of the piston rod 93 and an inner sidewall of the end cap 94 intended. A rodless chamber of the cylinder jacket 91 is with oil 97 coated. In a piston rod chamber of the cylinder jacket 91 is gas 98 filled. The needle valve is in the piston rod 93 arranged. A valve 99 the needle valve is on the piston 92 assembled. A switch 8th of the needle valve is at the outer end of the piston rod 93 intended.

In the first embodiment, the switch 8th an eccentric rotary switch. The eccentric rotary switch consists essentially of a rotary handle 81 and a cam 82 , The cam 82 is rotatable at the outer end of the piston rod 93 assembled. The twist grip 81 is safe on the cam 82 attached. With the cam 82 becomes a needle stick 95 the needle valve driven to move up and down. Turn the knob 81 is with the cam 82 the needle stick 95 for pushing and pulling driven to the valve 99 to the piston 92 to open and close. When opening the valve 99 becomes the first lockable telescopic mechanism 5 compressed with an external force. When closing the valve 99 becomes the first lockable telescopic mechanism 5 locked.

In the first embodiment, a pair of first support blocks 6 firmly under the two sides of the front of the treadmill deck 1 assembled. The first pads 6 each have an upwardly bent first joint eye. The lower ends of the first upright bars 3 are rotatably mounted with a plurality of rotating shafts on the two hinge eyes to each one of the two first pivot points 21 to build. A pair of second pads 7 is firmly under the two sides of the middle part of the treadmill deck 1 assembled. The second support blocks 7 each have an upwardly adjustable adjustable second joint eye. The cylinder stops of the first lockable telescopic mechanisms 5 are rotatably mounted with a plurality of rotating shafts on the two second pivot eyes to each form one of the two pivot points.

In the first embodiment, on the rear sides of the lower parts of the first upright bars 3 ever mounted a first joint seat. The ends of the piston rod of the two first lockable telescopic mechanisms 5 are rotatably mounted with a plurality of rotating shafts on the two first pivot seats to each one of the two second pivot points 12 to build. On the front sides of the middle parts of the first upright bars 3 each one of the second hinge seats is mounted. The cylinder stops of the two second lockable telescopic mechanisms 4 are rotatably mounted with a plurality of rotating shafts on the two second pivot seats to each one of the two third pivot points 13 to build.

In the first embodiment, on the two sides of the underside of the middle part of the control panel 2 mounted each third joint seats. The piston rod stops the two second lockable telescopic mechanisms 4 are rotatably mounted with a plurality of rotating shafts on the two third joint seats, each one of the two fourth pivot points 14 to build.

In the first embodiment, on the two sides of the underside of the rear part of the control panel 2 Four fourth articulated seats mounted. On the front sides of the upper ends of the first upright bars 3 each fifth joint seats are mounted. The two fifth hinge seats are rotatably mounted with a plurality of rotating shafts on the two fourth hinge seats, each one of the two second pivot points 22 to build.

The 1 to 5 show that a method of using the above described folding device of the treadmill with a disabling function comprises: (1) Fold down: the second lockable telescoping mechanisms 4 and the first lockable telescopic mechanisms 5 be first with the respective switches 8th detached, after which the control panel 2 is depressed with a force F. This is how the control panel will look 2 with the second lockable telescopic mechanisms 4 with a force F1 depressed to this relative to the first upright rods 3 in a last state parallel to the first upright bars 3 to turn and fold. After that, the first lockable telescopic mechanisms 5 with the first upright bars 3 through the control panel 2 with a force F2 relative to the treadmill deck 1 pressed down to the last state for storage obliquely. The arrow in the 1 indicates the folding direction. (2) Open: The control panel 2 is first lifted with a predetermined force in a predetermined angle, so that the second lockable telescopic mechanisms 4 and the first lockable telescopic mechanisms 5 be automatically pulled out, causing the control panel 2 and the first upright bars 3 can be automatically opened in their respective last states, after which the second lockable telescopic mechanisms 4 and the first lockable telescopic mechanisms 5 with the respective switches 8th be arrested. The treadmill generally has a Z-shape after unfolding.

In the first embodiment of the present invention, the features are used to extend and retract the lockable telescoping mechanisms and to manually turn the switches 8th can be controlled so that the treadmill is more practical and flexible for folding and storing and with the switch 8th can be locked in order to meet the safety requirements of the load capacity of the entire device. When unfolding it proves to be more stable and reliable, and it is more space-saving after folding for storage and packaging material is saved. The first upright bars 3 are in a stable, balanced state when folded for storage. Even with vibrations that occur during transport of the device, no noise caused by the vibrations caused by the first upright rods 3 and the control panel are caused.

The 9 shows a second embodiment of the present invention, which substantially corresponds to the first embodiment with the exceptions described below. The lower ends of the first upright bars 3 are hinged on each one of the two sides of the middle section of the treadmill deck 1 attached. The first lockable telescopic mechanisms 5 are hinged between the front sides of the middle parts of the first upright rods 3 and one each of the two sides of the front part of the treadmill deck 1 attached. The front end of the control panel 2 is movable at the upper ends of the first upright bars 3 fastened while the control panel 2 relative to the first upright bars 3 can be rotated forwards and backwards. The second lockable telescopic mechanisms 4 are hinged symmetrically between the underside of the middle part of the control panel 2 and one each of the backs of the middle parts of the first upright bars 3 attached. The folding device of the treadmill with the lock function is used the same as the first embodiment, but after unfolding has an inverted Z-shape. The arrow in the 9 indicates the folding direction.

The 10 shows that a folding device of the treadmill according to a third embodiment of the present invention, a treadmill deck 1 , several first upright poles 3 , a control panel 2 , two first lockable telescopic mechanisms 5 and two second upright poles 10 includes. The control panel 2 is at the upper ends of the first upright poles 3 assembled. The lower ends of the first upright bars 3 are movable on either side of the treadmill deck 1 attached. The first upright bars 3 Can be relative to the treadmill deck 1 be rotated forwards and backwards. The first lockable telescopic mechanisms 5 are symmetrical between the middle parts of the first upright rods 3 and one of the two sides of the treadmill deck 1 attached. One of the corresponding ones of the first upright poles 3 , the treadmill deck 1 and a corresponding one of the first lockable telescopic mechanisms 5 together form a triangular shape when the first lockable telescopic mechanisms 5 pulled out so that the first upright rods 3 can be stably deployed after unfolding. The first upright bars 3 are parallel or approximately parallel to the treadmill deck 1 arranged when the first lockable telescopic mechanisms 5 are retracted.

In the third embodiment, the lower ends of the first upright bars 3 with hinges on either side of the middle part of the treadmill deck 1 attached. The first lockable telescopic mechanisms 5 are hinged between the front sides of the middle parts of the first upright rods 3 and one each of the two sides of the front part of the treadmill deck 1 attached. The front end of the control panel 2 is movable at the upper ends of the first upright bars 3 fastened while the control panel 2 relative to the first upright bars 3 can be rotated forwards and backwards. The second upright bars 10 are with a hinge between the bottom of the middle part of the control panel 2 and one each of the two sides of the rear part of the treadmill deck 1 attached. The treadmill deck 1 , the control panel 2 , the first upright bars 3 and the second upright bars 10 together form a parallelogram mechanism.

In the third embodiment, the first lockable telescopic mechanisms 5 a telescopic mechanism with a locking function, such as a hydraulic cylinder, a pneumatic cylinder or an electric operating rod. One method of using the treadmill folding device with a locking function is as follows: (1) Fold down: the first telescoping mechanisms that can be locked 5 are first released, after which the control panel 2 is depressed with a force F. In this way, the first upright poles 3 through the control panel 2 with a force F1 depressed relative to the second upright rods 10 in a last state parallel to the first upright bars 3 to be turned and worked out. After that, the first lockable telescopic mechanisms 5 through the first upright bars 3 with the control panel 2 with a force F2 obliquely depressed to the first lockable telescopic mechanisms 5 relative to the treadmill deck 1 to turn into a final state for storage and collapse. The arrow in the 10 indicates the folding direction. (2) Fold Up: The first upright bars 3 and the second upright bars 10 will be in their last states with the first lockable telescopic mechanisms 5 automatically opened, after which the first lockable telescopic mechanisms 5 be arrested.

The 11 shows a fourth embodiment of the present invention, which substantially corresponds to the third embodiment with the exceptions described below. The lower ends of the first upright bars 3 With hinges on each one of the two sides of the front part of the treadmill deck 1 attached. The first lockable telescopic mechanisms 5 are hinged between the backs of the middle parts of the first upright poles 3 and one of the two sides of the middle part of the treadmill deck 1 attached. The underside of the middle part of the control panel 2 is movable at the upper ends of the first upright bars 3 attached, with the control panel 2 relative to the first upright bars 3 can be rotated forwards and backwards. The second upright bars 10 are hinged each between the front of the control panel 2 and the front of the treadmill deck 1 attached. The treadmill deck 1 , the control panel 2 , the first upright bars 3 and the second upright bars 10 together form a parallelogram mechanism. The folding device of the treadmill with the locking function is used in the same manner as the third embodiment, but after unfolding has a reverse configuration. The arrow in the 11 indicates the folding direction.

Despite the detailed description of the specific embodiments of the present invention for purposes of illustration, various modifications and improvements may be made without departing from the spirit and scope of the present invention.

LIST OF REFERENCE NUMBERS

1

Treadmill deck

2

control panel

3

First upright pole

4

Second lockable telescopic mechanism

5

First lockable telescopic mechanism

6

First edition block

7

Second edition block

8th

switch

81

rotary handle

82

cam

91

cylinder surface

92

piston

93

piston rod

94

end cap

95

needle sticks

96

seal

97

oil

98

gas

99

Valve

10

Second upright pole

11

First fulcrum

12

Second pivot

13

Third pivot

14

Fourth pivot

21

First pivot point

22

Second pivot point

Claims (10)

A folding device of a treadmill having a locking function, comprising a treadmill deck (1), a first upright bar (3), a control panel (2) and a first lockable telescopic mechanism (5); the control panel (2) being mounted to an upper end of the first upright bar (3); a lower end of the first upright bar (3) is movably mounted on one side of the treadmill deck (1); the first upright bar (3) can be rotated forward and backward relative to the treadmill deck (1); the first lockable telescopic mechanism (5) is mounted between a middle part of the first upright bar (3) and the side of the treadmill deck (1), the first upright bar (3), the treadmill deck (1) and the first one Lockable telescopic mechanism (5) together form a triangular shape, when the first lockable telescopic mechanism (5) is pulled out; the first upright bar (3) is parallel or approximately parallel to the treadmill deck (1) when the first telescoping telescopic mechanism (5) is retracted. The folding device of a treadmill with a locking function and method for using the same after Claim 1 further comprising a second lockable telescopic mechanism (4); a rear end of the control panel (2) being movably attached to the upper end of the first upright bar (3); the control panel (2) can be rotated forward or backward relative to the first upright bar (3); the second lockable telescopic mechanism (4) is fixed with a hinge between a lower side of a middle part of the control panel (2) and a front side of the middle part of the first upright bar (3). The folding device of a treadmill with a locking function and method for using the same after Claim 1 or 2 further comprising a second lockable telescopic mechanism (4); a front end of the control panel (2) being movably mounted on the upper end of the first upright bar (3); the control panel (2) can be rotated forward and backward relative to the first upright bar (3); the second lockable telescopic mechanism (4) is fixed with a hinge between a lower side of a middle part of the control panel (2) and a rear side of the middle part of the first upright bar (3). The folding apparatus of a treadmill having a lock function and method of using the same according to any one of Claims 1 to 3 further comprising a second upright bar (10); a front end of the control panel (2) is movably attached to the upper end of the first upright bar (3); wherein the control panel (2) can be rotated forward and backward relative to the first upright bar (3); the second upright bar (10) is fixed with a hinge between a central part of the control panel (2) and the side of the treadmill deck (1); the treadmill deck (1), the control panel (2), the first upright bar (3) and the second upright bar (10) together form a parallelogram shaped mechanism. The folding apparatus of a treadmill having a lock function and method of using the same according to any one of Claims 1 to 4 further comprising a second upright bar (10); a middle part of the control panel (2) being movably attached to the upper end of the first upright bar (3); the control panel (2) can be rotated forward and backward relative to the first upright bar (3); the second upright bar (10) is connected to a hinge between a front part of the control panel (2) and the side of the treadmill deck (1); the treadmill deck (1), the control panel (2), the first upright bar (3) and the second upright bar (10) together form a parallelogram shaped mechanism. The folding apparatus of a treadmill having a lock function and method of using the same according to any one of Claims 1 to 5 wherein the first lockable telescopic mechanism (5) consists of one of the gas springs with self-locking traction, a hydraulic cylinder, a pneumatic cylinder and an electric actuating rod. The folding device of a treadmill with a locking function and method for using the same after Claim 2 or 3 wherein the second lockable telescopic mechanism (4) consists of one of the gas springs with self-locking traction, a hydraulic cylinder, a pneumatic cylinder and an electric operating rod. The folding device of a treadmill with a locking function and method for using the same after Claim 6 , wherein the gas spring with self-locking traction consisting of a cylinder shell (91), a piston (92), a piston rod (93), a needle valve and a closure cap (94); the piston (92) is mounted in the cylinder jacket (91); the piston (92) is sealed and slidably mounted in the cylinder jacket (91); the end cap (94) is mounted on an opening of the cylinder jacket (91); the piston (92) is securely fixed to an inner end of the piston rod (93); the piston rod (93) protrudes outwardly from a hole in the center of the end cap (94); a sealing ring (96) is mounted between an outer side wall of the piston rod (93) and an inner side wall of the end cap (94); a rodless chamber of the cylinder jacket (91) is coated with oil (97); in a piston rod chamber of the cylinder jacket (91) a gas (98) is filled; the needle valve is disposed in the piston rod (93); a valve (99) of the needle valve is mounted on the piston (92); a switch (8) of the needle valve is provided at an outer end of the piston rod (93). The folding device of a treadmill with a locking function and method for using the same after Claim 8 wherein the switch (8) is an eccentric rotary switch; the eccentric rotary switch consists of a rotary handle (81) and a cam (82); the cam (82) is rotatably mounted on the outer end of the piston rod (93); the turning handle (81) is securely fixed to the cam (82); with the cam (82) a needle stick (95) of the needle valve is driven to move up and down. A method of using the folding device of the treadmill according to any one of Claims 1 - 5 comprising: (1) Folding down: releasing the first lockable telescopic mechanism (5) and retracting the first lockable telescopic mechanism (5) to place the first upright bar (3) relative to the treadmill deck (1) in a final condition for storage to turn and fold; (2) Fold Up: Extend the First Lockable Telescope Mechanism (5) to automatically unfold the first upright bar (3) to a final state and lock the first lockable telescopic mechanism (5).

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