FOLDABLE STRUCTURE WITH AN AUTOMATICALLY LIFTING SLOPE AND TREADMILL USING THE SAME

Abstract

The present invention discloses a foldable structure with an automatically lifting slope and a treadmill using the same, where a front portion of a support frame is pivoted on a base frame via a first rotating shaft extending left and right; a front portion of the workbench is pivoted at a rear portion of the support frame via a second rotating shaft extending left and right; and a telescopic rod has a front portion hinged on the base frame and a rear portion hinged on the workbench.

Claims

1. A foldable structure with an automatically lifting slope, comprising a base frame, a support frame, a workbench, and a telescopic rod, wherein the base frame is fixedly arranged; a front portion of the support frame is pivoted on the base frame via a first rotating shaft extending left and right, and a rear portion of the support frame is movably arranged; a front portion of the workbench is pivoted at the rear portion of the support frame via a second rotating shaft extending left and right, and a rear portion of the workbench is movably arranged; and the telescopic rod is located below the support frame and the workbench, a front portion of the telescopic rod hinged on the base frame and a rear portion of the telescopic rod hinged on the workbench, such that after retracting, the telescopic rod is configured to pull the workbench to move forwards and drive the rear portion of the support frame to swing upwards, thus supporting the front portion of the workbench, and after extending, the telescopic rod is configured to push against the rear portion of the workbench to swing upwards, enabling the workbench to stand up.

2. The foldable structure with an automatically lifting slope according to claim 1, wherein the second rotating shaft is higher than the first rotating shaft, such that when retracting to pull the workbench to move forwards, the telescopic rod is configured to drive the rear portion of the support frame to swing upwards and support the front portion of the workbench.

3. The foldable structure with an automatically lifting slope according to claim 1, wherein a hinge point between the telescopic rod and the base frame is located below the first rotating shaft, and the telescopic rod is inclined, with a front end of the telescopic rod being lower than a rear end of the telescopic rod, such that after extending, the telescopic rod is configured to push against the rear portion of the workbench to swing upwards, enabling the workbench to stand up.

4. The foldable structure with an automatically lifting slope according to claim 1, wherein a first limit portion is formed on the support frame, a second limit portion is formed on the workbench, the first limit portion and the second limit portion are located on a front side of the second rotating shaft, and when the rear portion of the workbench swings upwards, the second limit portion is configured to abut downwards onto the first limit portion to limit the swing between the workbench and the support frame.

5. The foldable structure with an automatically lifting slope according to claim 4, wherein the first limit portion is U-shaped with an opening facing upwards, and the second limit portion is configured to slide into the first limit portion from the opening of the U-shaped first limit portion to abut the first limit portion.

6. The foldable structure with an automatically lifting slope according to claim 1, wherein a support frame limiting apparatus is disposed between the base frame and the support frame, and the support frame limiting apparatus is configured to limit a swing angle range of the support frame.

7. The foldable structure with an automatically lifting slope according to claim 1, wherein a bottom side of the rear portion of the workbench is provided with a roller, when the telescopic rod extends or retracts to enable the workbench to be on a horizontal level, the rear portion of the workbench falls on a ground via the roller, the roller is configured to roll forward and backward, the telescopic rod retracts to pull the workbench to move forwards, drive the rear portion of the support frame to swing forwards, and support the front portion of the workbench, the roller remains on the ground, and the telescopic rod extends to push against the rear portion of the workbench to swing upwards, enabling the workbench to stand up.

8. The foldable structure with an automatically lifting slope according to claim 1, wherein a front portion of the base frame is mounted with an upright rod, a bottom end of the upright rod is fixed on the base frame, a top end of the upright rod is pivoted with a handrail via a handrail pivot shaft extending left and right, a connecting rod is further provided, an upper end of the connecting rod and the handrail are eccentrically pivoted in relation to the handrail pivot shaft, and a lower end of the connecting rod and the support frame are eccentrically pivoted in relation to the first rotating shaft, such that the support frame and the handrail achieve hinged rotation via the connecting rod, allowing the workbench to swing forwards and stand up under a hinge of the handrail when the workbench needs to stand up, and allowing the workbench to swing and extend backwards under the hinge of the handrail after the workbench is lowered.

9. A treadmill, using the foldable structure with an automatically lifting slope according to claim 1 and provided with a running belt on a top surface of the workbench along a front-back direction.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0020] FIG. 1 is a three-dimensional view of a workbench in a horizontal state according to the present invention.

[0021] FIG. 2 is a locally enlarged view at part B in FIG. 1.

[0022] FIG. 3 is a side view of the workbench in the horizontal state according to the present invention.

[0023] FIG. 4 is a three-dimensional view of a front portion of the workbench being supported according to the present invention.

[0024] FIG. 5 is a side view of the front portion of the workbench being supported according to the present invention.

[0025] FIG. 6 is a three-dimensional view of the workbench in an upright state according to the present invention.

[0026] FIG. 7 is a schematic diagram of a handrail when the workbench is in the horizontal state according to an embodiment with a handrail.

[0027] FIG. 8 is a locally enlarged view at part C in FIG. 7.

[0028] FIG. 9 is a locally enlarged view at part D in FIG. 7.

[0029] FIG. 10 is a schematic diagram of the handrail when the front portion of the workbench is supported according to the embodiment with the handrail.

[0030] FIG. 11 is a schematic diagram of the handrail when the workbench stands up according to the embodiment with the handrail.

[0031] Description of reference numerals: 1. base frame, 2. support frame, 3. workbench, 4. telescopic rod, 5. first rotating shaft, 6. second rotating shaft, 7. first limit portion, 8. second limit portion, 9. support frame limiting apparatus, 10. roller, 11. left support arm, 12. right support arm, 13. limit notch, 14. limit pin, 15. upright rod, 16. handrail pivot shaft, 17. handrail, and 18. connecting rod.

DESCRIPTION OF EMBODIMENTS

[0032] The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.

[0033] In the claims, specification, and the above figures of the present invention, unless otherwise explicitly defined, positional terms such as "center", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "rear", "left", "right", "clockwise", and "counterclockwise" are used to indicate directions or positional relationships for convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the referred apparatus or elements must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of the present invention.

[0034] A foldable structure with an automatically lifting slope, as shown in FIGS. 1 to 6, includes a base frame 1, a support frame 2, a workbench 3, and a telescopic rod 4. The base frame 1 is fixedly arranged. Specifically in this embodiment, the base frame 1 is placed on the ground. The front portion of the support frame 2 is pivoted on the base frame 1 via a first rotating shaft 5 extending left and right, and the rear portion of the support frame 2 is arranged movably, allowing the rear portion of the support frame 2 to swing up and down. The front portion of the workbench 3 is pivoted at the rear portion of the support frame 2 via a second rotating shaft 6 extending left and right, to move along with the swing of the rear portion of the support frame 2. The rear portion of the workbench 3 is arranged movably, such that the rear portion of the workbench 3 can swing up and down relative to the support frame 2. The telescopic rod 4 is located below the support frame 2 and the workbench 3, and can be any existing type of telescopic rod structure, preferably an electric telescopic rod, but can also be pneumatic or hydraulic, without limitation. The front portion of the telescopic rod 4 is hinged on the base frame 1, and the rear portion is hinged on the workbench 3. The second rotating shaft 6 is higher than the first rotating shaft 5, such that when the telescopic rod 4 retracts to pull the workbench 3 forward, it can drive the rear portion of the support frame 2 to swing upwards and support the front portion of the workbench 3. This elevates the front portion of the workbench 3 to form a slope with the front end being higher than the rear end, adjusting the included angle of the workbench 3. The hinge point between the telescopic rod 4 and the base frame 1 is located below the first rotating shaft 5, and the telescopic rod 4 is inclined with the front end being lower than the rear end, such that after extending, the telescopic rod 4 can push against the rear portion of the workbench 3 to swing upwards, enabling the workbench 3 to stand up. This allows the workbench 3 to be folded and stand up, thereby reducing the space occupied by the workbench 3.

[0035] Due to the extension of the telescopic rod 4, when it pushes against the rear portion of the workbench 3 to swing upwards, the front portion of the workbench 3 carries the rear portion of the support frame 2 to swing upwards. If the swing between the workbench 3 and the support frame 2 is not limited, the level change of the structure is uncertain. Therefore, preferably in this embodiment, a first limit portion 7 is formed on the support frame 2, a second limit portion 8 is formed on the workbench 3, and the first limit portion 7 and the second limit portion 8 are located on the front side of the second rotating shaft 6. When the rear portion of the workbench 3 swings upwards, the second limit portion 8 can abut downwards onto the first limit portion 7 to limit the swing between the workbench 3 and the support frame 2. More specifically, to achieve more secure fixing, the first limit portion 7 is in the shape of U with an opening facing upwards, and the second limit portion 8 is configured to slide into the first limit portion 7 from the opening of the U shape of the first limit portion 7 to abut onto the first limit portion 7. More specifically, in this embodiment, the support frame 2 consists of a left support arm 11 and a right support arm 12, which are symmetrically arranged and respectively disposed on the left and right sides of the workbench 3. The left and right sides of the workbench 3 are each provided with the second limit portion 8, the second limit portion 8 being in the form of a cross pin. The inner sides of the left support arm 11 and the right support arm 12 are each provided with a U-shaped first limit portion 7 to allow the second limit portion 8 on the corresponding side to slide in. Before the support frame 2 supports the front portion of the workbench 3, the second limit portion 8 is always in abutment with the first limit portion 7.

[0036] To limit the swing angle of the support frame 2 and avoid apparatus failure or danger, a support frame limiting apparatus 9 is disposed between the base frame 1 and the support frame 2. The support frame limiting apparatus 9 is configured to limit the swing angle range of the support frame 2 and can be of any structure capable of limiting the swing angle range between the support frame 2 and the workbench 3. The specific angle range can be set according to the needs of those skilled in the art. Specifically, in this embodiment, limit pins 14 protrude from the outer sides of the left support arm 11 and the right support arm 12, and limit notches 13 are formed at corresponding positions on the base frame 1. The limit pin 14 extends into and is confined within the limit notch 13. When the support frame 2 pivots, it drives the limit pin 14 to move until the limit pin 14 reaches either of two ends of the limit notch 13, indicating the support frame 2 can no longer continue to move.

[0037] Preferably, in this embodiment, the front-to-back length of the base frame 1 is shorter than that of the workbench 3, with the base frame 1 located under the front half of the workbench 3. The bottom side of the rear portion of the workbench 3 is provided with a roller 10. When the telescopic rod 4 extends or retracts to enable the workbench 3 to be in a horizontal level, the rear portion of the workbench 3 falls on the ground via the roller 10, the roller 10 being configured to roll forward and backward. At this time, the telescopic rod 4 retracts to pull the workbench 3 to move forwards and drive the rear portion of the support frame 2 to swing upwards, thus supporting the front portion of the workbench 3, and the roller 10 remains on the ground. The telescopic rod 4 extends to push against the rear portion of the workbench 3 to swing upwards, enabling the workbench 3 to stand up. Thus, after the workbench 3 stands up, it only occupies the area of the base frame 1 on the ground.

[0038] Specifically, in this embodiment, referring to FIGS. 7 to 11, a handrail assembly for the user to grasp during use is also provided. When the workbench 3 stands up, to fold it under the hinge of the handrail assembly, the preferred handrail assembly in this embodiment is the following structure: An upright rod 15 is mounted at the front portion of the base frame 1, the bottom end of the upright rod 15 is fixed on the base frame 1, and the top end of the upright rod 15 is pivoted with a handrail 17 via a handrail pivot shaft 16 extending left and right. More specifically, two upright rods 15 are provided, respectively located on the left and right sides of the front portion of the base frame 1, and the handrail 17 is connected between the two upright rods 15. Two connecting rods 18 are also provided, which is true of more specific embodiments. The upright rods 15 are hollow, and the two connecting rods 18 respectively pass into the two upright rods 15. The upper end of the connecting rod 18 and the handrail 17 are eccentrically pivoted relative to the handrail pivot shaft 16, and the lower end of the connecting rod 18 and the support frame 2 are eccentrically pivoted relative to the first rotating shaft 5 (in this embodiment, to simplify the structure, the lower end of the connecting rod 18 is preferably pivoted on the limit pin 14). The specific pivot point can be determined by those skilled in the art based on actual conditions such as size. As long as the support frame 2 and the handrail 17 can achieve joint rotation through the connecting rod 18, when the workbench 3 is to stand up, it can swing forwards and stand up under the hinge of the handrail 17, and when the workbench 3 is to be lowered (that is, in the state where it falls on the ground via the roller 10), it can swing and extend backwards under the hinge of the handrail 17. Therefore, when the workbench 3 is lowered for use, the handrail 17 extends backward above the workbench 3 for the user on the workbench 3 to grasp, and when the workbench 3 stands up in a folded state, the handrail 17 also stands up, reducing lateral space occupation.

[0039] A treadmill, using the foldable structure with an automatically lifting slope as described above, is provided with a running belt on the top surface of the workbench 3 along a front-back direction. The running belt can be of the running belt structure on any existing treadmill, which is a conventional setting in the field and thus not shown in the figure. When the front portion of the workbench 3 is lifted, the user can simulate running uphill on the running belt.

[0040] The above descriptions are merely preferred embodiments of the present invention and are not intended to limit the design of this case. Any equivalent changes made based on the key design of this case shall fall within the protection scope of this case.