FOLDABLE WALKING PAD

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to and the benefit of Chinese Patent Application No. 202411828533.9, filed on Dec. 12, 2024, Chinese Patent Application No. 202423079906.5, filed on Dec. 12, 2024, and Chinese Patent Application No. 202521738117.X, filed on Aug. 15, 2025, which are hereby incorporated by reference in their entirety.

TECHNICAL FIELD

The present application relates to the technical field of fitness equipment, specifically a foldable walking pad.

BACKGROUND

The fast pace of life, high intensity, and long working hours inevitably affect people's health. The age of onset for diseases such as cervical spondylosis, sciatica, and lumbar disc herniation is gradually decreasing. Therefore, people often engage in physical exercise using fitness equipment or outdoor sports in their spare time at work to improve their physical fitness. Currently, a lot of office workers are limited by their work hours and find it difficult to exercise outdoors. To ensure effective physical activity, they often place walking pads next to their desks and use them for exercise after a certain period of work.

Walking pads, also known as treadmills, are relatively large, with long walking pads that take up considerable space for transportation and storage. Therefore, most walking pads are designed to be foldable. The walking pads can be folded to save space during transportation and storage, and can be unfolded horizontally for use. Such a foldable walking pad generally includes two walking pads that are foldable relative to each other, and the two opposite ends of the two frames of the two walking pads adopt a foldable structure in which a slider and a sliding shaft cooperate with a sliding slot, so as to enable the folding or unfolding of the two walking pads.

For example, the Chinese patent application with publication number CN219307832U and titled “Folding Mechanism for Pads of Foldable Treadmill” discloses a foldable walking pad including two base frames and a hinge disposed between the two base frames. The hinge includes two hinge bodies, each of which includes a hinge seat, a hinge shaft, a chain piece, and a sliding shaft. One end of the hinge seat of each hinge body is inserted into the opening of the base frame and is fixed by bolts that pass vertically through the base frame and the hinge seat. The upper side of the unfixed ends of the two hinge seats are respectively provided with two hinge shafts, and the two hinge seats are also provided with two upwardly inclined strip grooves. One sliding shaft is inserted into one strip groove. The chain piece is arc-shaped and located outside the hinge seat. One end of the chain piece is movably fixed to one hinge shaft, and the other end is movably fixed to one sliding shaft of the other hinge seat. At the same time, the middle parts of the chain pieces of the two hinge bodies are connected by a connecting shaft.

The folding structure mentioned above has some defects in actual use. During the folding process of the walking pad, due to the unavoidable sliding gap between the sliding shaft and the sliding slot, there is a relative shaking phenomenon during the folding process, resulting in poor structural stability and poor user experience.

SUMMARY

The present application provides a foldable walking pad, including:

• • a walking pad body, wherein the walking pad body includes a first walking pad and a second walking pad, an end of a frame of the first walking pad is connected to a first fixing plate, and an end of a frame of the second walking pad is connected to a second fixing plate opposite to the first fixing plate; and
  • a folding assembly, wherein the folding assembly connects the first fixing plate and the second fixing plate, the folding assembly is configured to allow the second walking pad to rotate relative to the first walking pad; the folding assembly includes an outer main connecting member and an outer auxiliary connecting member disposed on outer sides of the second walking pad to rotate relative to the first walking pad, and an inner main connecting member and an inner auxiliary connecting member disposed on inner sides of the second walking pad to rotate relative to the first walking pad; the outer main connecting member is pivotally connected to a middle of the inner main connecting member; one end of the outer main connecting member is pivotally connected to the first fixing plate, an other end of the outer main connecting member is pivotally connected to the outer auxiliary connecting member, and the outer auxiliary connecting member is pivotally connected to the second fixing plate; one end of the inner main connecting member is pivotally connected to the second fixing plate, an other end of the inner main connecting member is pivotally connected to the inner auxiliary connecting member, and the inner auxiliary connecting member is pivotally connected to the first fixing plate.

In some embodiments, a lower end of the outer main connecting member is pivotally connected to a lower end of the outer auxiliary connecting member, an upper end of the outer auxiliary connecting member is pivotally connected to the second fixing plate, a lower end of the inner main connecting member is pivotally connected to a lower end of the inner auxiliary connecting member, and an upper end of the inner auxiliary connecting member is pivotally connected to the first fixing plate.

In some embodiments, the pivotal connections are formed by pins and pin holes.

In some embodiments, the outer main connecting member and the inner main connecting member are pivotally connected at their middles by a fourth pin, and the first fixing plate is provided with a first positioning groove at one end near the second fixing plate, and the second fixing plate is provided with a second positioning groove at one end near the first fixing plate; when the second walking pad is rotated to an unfolded state relative to the first walking pad, the first positioning groove and the second positioning groove are respectively engaged with the fourth pin.

In some embodiments, both the outer main connecting member and the inner main connecting member have two rotating arms arranged at a certain angle: a first rotating arm and a second rotating arm; the first rotating arm of the outer main connecting member is pivotally connected to the first fixing plate, and the second rotating arm of the outer main connecting member is pivotally connected to the lower end of the outer auxiliary connecting member; the first rotating arm of the inner main connecting member is pivotally connected to the second fixing plate, and the second rotating arm of the inner main connecting member is pivotally connected to the lower end of the inner auxiliary connecting member.

In some embodiments, when the second walking pad is rotated to an unfolded state relative to the first walking pad, two projections of the outer main connecting member and the inner main connecting member along a width direction of the walking pad body are symmetrically arranged about a perpendicular bisector of a line connecting the two projections.

In some embodiments, the first fixing plate protrudes outward from the end of the frame of the first walking pad, and the second fixing plate protrudes outward from the end of the frame of the second walking pad, and a rotation gap is formed between the end of the frame of the first walking pad and the end of the frame of the second walking pad for accommodating a rotation movement of the folding assembly.

In some embodiments, a first walking plate is connected to a top of the frame of the first walking pad, and a second walking plate is connected to a top of the frame of the second walking pad, and an installation gap is formed between the first walking plate and the second walking plate.

In some embodiments, tops of the first walking plate and the second walking plate are connected to a wear-resistant layer covering the first walking plate and the second walking plate.

In some embodiments, the foldable walking pad further includes a running belt, a driving motor, a front rotating roller connected to the first walking pad and driven by the driving motor, and a rear rotating roller connected to the second walking pad, and the running belt is sequentially wound around the front rotating roller and the rear rotating roller.

In some embodiments, the end of the frame of the first walking pad is connected to a first cover configured to cover an outside of the first fixing plate, and the end of the frame of the second walking pad is connected to a second cover configured to cover an outside of the second fixing plate.

In some embodiments, an upper end of the outer main connecting member is pivotally connected to an upper end of the outer auxiliary connecting member, a lower end of the outer auxiliary connecting member is pivotally connected to the second fixing plate, an upper end of the inner main connecting member is pivotally connected to an upper end of the inner auxiliary connecting member, and a lower end of the inner auxiliary connecting member is pivotally connected to the first fixing plate.

In some embodiments, the first fixing plate is connected to an end of a longitudinal rod of the frame of the first walking pad, and the second fixing plate is connected to an end of a longitudinal rod of the frame of the second walking pad.

In some embodiments, when the foldable walking pad is placed horizontally in an unfolded state:

• • a first outer pin hole at an upper part of the outer auxiliary connecting member is pivotally connected to a first inner pin hole at one end of an upper part of the outer main connecting member via a first pin; a second outer pin hole at a lower part of the outer auxiliary connecting member is pivotally connected to a second inner pin hole at a lower part of the first fixing plate away from the second fixing plate via a second pin; a third outer pin hole at an other end of the upper part of the outer main connecting member is pivotally connected to a third inner pin hole at an upper part of the second fixing plate near the first fixing plate via a third pin; a fourth outer pin hole at a lower part of the outer main connecting member is pivotally connected to a fourth inner pin hole at a lower part of the inner main connecting member via a fourth pin; a fifth inner pin hole at one end of an upper part of the inner main connecting member is pivotally connected to a fifth outer pin hole at an upper part of the first fixing plate near the second fixing plate via a fifth pin; a sixth inner pin hole at a lower part of the inner auxiliary connecting member is pivotally connected to a sixth outer pin hole at a lower part of the second fixing plate away from the first fixing plate via a sixth pin; a seventh inner pin hole at an upper part of the inner auxiliary connecting member is pivotally connected to a seventh outer pin hole at an other end of the inner main connecting member via a seventh pin;
  • lower parts of adjacent ends of the first fixing plate and the second fixing plate are both cut off to form a space for accommodating the fourth pin; a lower part of one end of the outer main connecting member away from the inner main connecting member is cut off to form a space for accommodating the second pin; a lower part of an end of the inner main connecting member away from the outer main connecting member is cut off to form a space for accommodating the sixth pin.

In some embodiments, inclined edges are formed by cutting off both the lower parts of adjacent ends of the first fixing plate and the second fixing plate; the space for accommodating the fourth pin, which is formed by the inclined edges, makes a distance between the first fixing plate and the second fixing plate in the unfolded state of the foldable walking pad gradually increase from top to bottom, and curved corners are formed at junctions between the inclined edges and corresponding top edges of the first fixing plate and the second fixing plate; the outer main connecting member is a triangle with all its three angles formed as arc curved corners; the inner main connecting member is a triangle with all its three angles formed as arc curved corners.

In some embodiments, a first small-diameter rod of a first step rod of the first pin is accommodated in and secured to the first inner pin hole of the outer main connecting member; a first screw passes through the first outer pin hole of the outer auxiliary connecting member and is screwed into a first threaded hole of the first step rod; the first outer pin hole of the outer auxiliary connecting member is rotatably engaged with a first large-diameter rod of the first step rod; the seventh pin has a same structure as the first pin and is symmetrically arranged.

In some embodiments, a second small-diameter rod of a second step rod of the second pin is accommodated in and secured to the second inner pin hole of the first fixing plate; a second screw passes through the second outer pin hole of the outer auxiliary connecting member and is screwed into a second threaded hole of the second step rod; a second large-diameter rod of the second step rod serves as an axially spaced section; the second outer pin hole of the outer auxiliary connecting member is rotatably engaged with a second middle-diameter rod of the second step rod; the second screw is screwed into the second threaded hole of the second step rod; the sixth pin has a same structure as the second pin and is symmetrically arranged.

In some embodiments, a third large-diameter rod of a third step rod of the third pin is an axial limiting rod, a rear section of a third small-diameter rod of the third step rod is accommodated in the third inner pin hole of the second fixing plate, the third outer pin hole of the outer main connecting member is rotatably engaged with a part of the third small-diameter rod of the third step rod that extends out of the second fixing plate, and a third screw passes through the third outer pin hole of the outer main connecting member and is screwed into a third threaded hole of the third step rod; the fifth pin has a same structure as the third pin and is symmetrically arranged.

In some embodiments, a middle part of a fourth step rod of the fourth pin is a fourth large-diameter rod, a fourth inner small-diameter rod of the fourth step rod is rotatably engaged with the fourth inner pin hole of the inner main connecting member, and a fourth inner screw is screwed into a fourth inner thread hole of the fourth step rod; a fourth outer small-diameter rod of the fourth step rod is rotatably engaged with the fourth outer pin hole of the outer main connecting member, and a fourth outer screw is screwed into a fourth outer thread hole of the fourth step rod.

Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the drawings.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic structural diagram a foldable walking pad according to some embodiments of the present application.

FIG. 2 is a schematic structural diagram of a foldable walking pad from a bottom view according to some embodiments of the present application.

FIG. 3 is a schematic structural diagram of internal structures of a foldable walking pad according to some embodiments of the present application.

FIG. 4 is a schematic structural diagram of a foldable walking pad in a folded state according to some embodiments of the present application.

FIG. 5 is a schematic cross-sectional structural diagram of a foldable walking pad according to some embodiments of the present application.

FIG. 6 is a schematic diagram of partial assembly structures of a foldable walking pad according to some embodiments of the present application.

FIG. 7 is a schematic structural diagram of internal frames of a foldable walking pad according to some embodiments of the present application.

FIG. 8 is a schematic structural diagram of internal frames of a foldable walking pad from another angle according to some embodiments of the present application.

FIG. 9 is an enlarged schematic diagram of a portion D in FIG. 8.

FIG. 10 is a schematic structural diagram of a folding assembly of foldable walking pad according to some embodiments of the present application.

FIG. 11 is a schematic structural diagram of a folding assembly of foldable walking pad from another angle according to some embodiments of the present application.

FIG. 12 is a schematic structural diagram of internal frames, which are in a folded state, of a foldable walking pad according to some embodiments of the present application.

FIG. 13 is a schematic structural diagram of internal frames, which are in a folded state, of a foldable walking pad from another angle according to some embodiments of the present application.

FIG. 14 is a schematic structural diagram of a foldable walking pad in an unfolded state according to some embodiments of the present application, where a first walking plate is shown by a cross-section.

FIG. 15 is an enlarged structural diagram of portion A in FIG. 14.

FIG. 16 is an exploded diagram of a folding assembly in FIG. 15.

FIG. 17 is a schematic structural diagram of a folding assembly of a foldable walking pad in a folded state according to some embodiments of the present application.

FIG. 18 is an enlarged structural diagram of portion B in FIG. 17.

FIG. 19 is an enlarged structural diagram of portion C in FIG. 17.

DESCRIPTION OF EMBODIMENTS

Those skilled in the art should understand that the embodiments and the implementations are merely used to explain the technical principles of the technical solutions of the present application and are not intended to limit the scope of protection of the technical solutions of the present application. Those skilled in the art may adjust them as needed to suit specific application scenarios.

In the description of the embodiments of the present application, it should be noted that, unless otherwise specified or limited, the terms “connected” and “connection” should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, movable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present application based on the specific circumstances.

In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being “above” or “below” a second feature may mean that the first and second features can be in direct contact, or that the first and second features can be in indirect contact through an intermediate medium. Furthermore, a first feature being “above”, “on” and “over” a second feature may mean that the first feature is directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being “below”, “beneath” and “under” a second feature may mean that the first feature is directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

As used herein, singular references (e.g., “a”, “an”, “first”, “second”, etc.) do not exclude a plurality. The term “a” or “an” object, as used herein, refers to one or more of that object. The terms “a” (or “an”), “one or more”, and “at least one” are used interchangeably herein. Furthermore, although individually listed, a plurality of means, elements, or actions may be implemented by, e.g., the same entity or object. Additionally, although individual features may be included in different examples or claims, these may possibly be combined, and the inclusion in different examples or claims does not imply that a combination of features is not feasible and/or advantageous. The terms “first”, “second”, “third”, and the like are used only as labels, not to the number or the importance of objects thereof.

The present application will now be described in further detail with reference to the drawings and embodiments.

As shown in FIGS. 1 to 13, this application discloses a foldable walking pad, also known as a treadmill. The walking pad includes a walking pad body that includes a first walking pad 1 and a second walking pad 2. An end of a frame of the first walking pad 1 is connected to a first fixing plate 15, and an end of a frame of the second walking pad 2 is connected to a second fixing plate 25 opposite to the first fixing plate 15. A folding assembly is provided between the first fixing plate 15 and the second fixing plate 25, connecting the two fixing plates to allow the second walking pad 2 to rotate relative to the first walking pad 1, thus placing the walking pad body in an unfolded or folded state. In the unfolded state, the first walking pad 1 and the second walking pad 2 are horizontally aligned and spliced together to form a complete walking pad body, allowing the user to perform walking or running training. In the folded state, the second walking pad 2 is rotated and folded to be positioned above or under the first walking pad 1 and stacked therewith, allowing the walking pad to be stored away to save space.

For example, as shown in FIGS. 1, 2, 3, 7, and 8, the first walking pad 1 includes a first frame 11, and the second walking pad 2 includes a second frame 21. Both the first frame 11 and the second frame 21 are rectangularly arranged by splicing metal profiles. Both the first frame 11 and the second frame 21 include two side bars extending along the length of the walking pad body respectively on their both sides, and the two side bars are connected together by crossbars. When the walking pad is in a fully unfolded state, a tail end of the first frame 11 and a head end of the second frame 21 are opposite to each other, thus forming a complete frame of the foldable walking pad. Two first fixing plates 15 and two second fixing plates 25 are provided. The two first fixing plates 15 are respectively connected to tail ends of two side bars on both sides of the first frame 11 by fasteners. The two second fixing plates 25 are respectively connected to head ends of two side bars on both sides of the second frame 21 by fasteners. Two folding assemblies are also provided, and are respectively set on both sides of the walking pad body and located at the junction of the first frame 11 and the second frame 21. Each folding assembly is respectively connected to the first fixing plate 15 at the end of the side bar of the first frame 11 and the second fixing plate 25 at the end of the side bar of the second frame 21.

Understandably, the foldable walking pad further includes a driving motor 400, a front rotating roller 402, and a rear rotating roller 401, with a running belt 300 sequentially wound around the front rotating roller 402 and the rear rotating roller 401. The driving motor 400 is mounted on a frame inside the walking pad body and is connected to the front rotating roller 402 for driving the front rotating roller 402 to rotate, thereby driving the running belt 300 to move. The driving motor 400 may drive the front rotating roller 402 to rotate via a belt or chain.

For example, as shown in FIGS. 1, 2, 3, and 4, the driving motor 400 and the front rotating roller 402 are mounted on the first frame 11 within the first walking pad 1, and are located at the head of the first frame 11, namely, at the end of the first frame 11 away from the second frame 21. The rear rotating roller 401 is rotatably connected to the second frame 21 within the second walking pad 2, and is located at the end of the second frame 21 away from the first frame 11. When the second walking pad 2 rotates and folds relative to the first walking pad 1, the running belt 300 folds accordingly. When the second walking pad 2 rotates and unfolds relative to the first walking pad 1, the running belt 300 unfolds accordingly.

It is easy to understand that, in order to allow users to experience different running belt speeds or exercise modes, the foldable walking pad further includes a control unit on the first frame 11 of the first walking pad 1, and the control unit is electrically connected to the driving motor 400 to control the operation of the driving motor 400. The basic structures, operating principles, and working modes of the foldable walking pad are all technical means of relatively mature in the art, and will not be explained in detail in this application.

Furthermore, as shown in FIGS. 5 and 6, a first walking plate 14 is connected to a top of the first frame 11 of the first walking pad 1, and a second walking plate 24 is connected to a top of the second frame 21 of the second walking pad 2. Both the first walking plate 14 and the second walking plate 24 are plates of uniform thickness, and there is an installation gap between the first walking plate 14 and the second walking plate 24. The existence of this installation gap can effectively prevent rotational interference between the second walking plate 24 and the first walking plate 14 of the first walking pad 1 when the second walking plate 24 rotates relative to the second walking pad 2, thus avoiding frictional noise and improving the user experience.

It is easy to understand that when a user walks or runs on the running belt 300, frictions will be generated between the running belt 300 and the first walking plate 14 and the second walking plate 24, which are particularly likely to cause wear on the back of the running belt 300 or the tops of the first walking plate 14 and the second walking plate 24. Therefore, in this application, as shown in FIGS. 5 and 6, a wear-resistant layer 301 is connected to the tops of the first walking plate 14 and the second walking plate 24 and covers the first walking plate 14 and the second walking plate 24. Specifically, the wear-resistant layer 301 may be a flexible friction pad layer made of rubber or plastic. The wear-resistant layer 301 can effectively reduce the wear on the back of the walking pad 300 or the tops of the first walking plate 14 and the second walking plate 24, improving the service life of the running belt 300 and improving the user's walking or running experience.

Taking a foldable walking pad with a width of 50-80 cm and a length of 90-150 cm as an example, where the length of its second walking pad 2 is 40-75 cm, when the second walking pad 2 rotates and folds relative to the first walking pad 1, if the cooperation gaps of the folding assembly are too large, it will cause the second walking pad 2 to wobble relative to the first walking pad 1. Therefore, in this application, as shown in FIGS. 5, 7, 8, 9, 10, and 11, each folding assembly includes an outer main connecting member 4 and an outer auxiliary connecting member 3 disposed on the outer sides of the fixing plates, and an inner main connecting member 5 and an inner auxiliary connecting member 6 disposed on the inside of the fixing plates. The outer main connecting member 4 is pivotally connected to a middle of the inner main connecting member 5. One end of the outer main connecting member 4 is pivotally connected to the first fixing plate 15, and the other end of the outer main connecting member 4 is pivotally connected to the lower end of the outer auxiliary connecting member 3. The upper end of the outer auxiliary connecting member 3 is pivotally connected to the second fixing plate 25. One end of the inner main connecting member 5 is pivotally connected to the second fixing plate 25, and the other end of the inner main connecting member 5 is pivotally connected to the lower end of the inner auxiliary connecting member 6. The upper end of the inner auxiliary connecting member 6 is pivotally connected to the first fixing plate 15.

Specifically, each folding assembly of the foldable walking pad including the outer main connecting member 4, the outer auxiliary connecting member 3, the inner main connecting member 5, and the inner auxiliary connecting member 6, and the four connecting members being respectively pivotally connected to the fixing plates of the first walking pad 1 and the second walking pad 2, not only provide good structural stability but also replace the sliding connection between the sliding shaft and the strip through groove in the prior art. Therefore, the precision of the connections and engagements can be improved because of the pivotal connections. Good fit and levelness can be achieved between the opposite ends of the first walking pad 1 and the second walking pad 2 after unfolding. It also essentially eliminates the shaking phenomenon caused by gaps when the walking pad body rotates and folds. Therefore, this foldable walking pad can eliminate or partially eliminate shaking during the folding process and has good structural stability, resulting in a better user experience.

In this application, the pivotal connection may be a connection between a pin and a pin hole, and at least one of every two connecting members that are pivotally connected can rotate relative to the pin. The pin hole is also called a shaft hole, and the pin is also called a hinge pin or pin shaft. This pivotal connection between the pin and the pin hole can improve the connection accuracy, thereby further eliminating the shaking caused by the rotational clearance or sliding engagement during the folding process of the walking pad body.

For example, as shown in FIGS. 7, 8, 9, 10, 11, 12, and 13, both the outer auxiliary connecting member 3 and the inner auxiliary connecting member 6 are straight rods, respectively located on the outer and inner sides of the fixing plates. The outer main connecting member 4 and the inner main connecting member 5 have the same shape, both being arc-shaped or L-shaped, and are respectively located on the outer and inner sides of the fixing plates. Specifically, both the outer main connecting member 4 and the inner main connecting member 5 have two rotating arms arranged at a certain angle: a first rotating arm 505 and a second rotating arm 506. The angle between the first rotating arm 505 and the second rotating arm 506 is greater than 90 degrees and less than 150 degrees. In some embodiments, the angle between the first rotating arm 505 and the second rotating arm 506 may be 110 degrees. The free end of the first rotating arm 505 of the outer main connecting member 4 is pivotally connected to the upper part of the first fixing plate 15. The free end of the second rotating arm 505 of the inner main connecting member 4 is pivotally connected to the lower end of the outer auxiliary connecting member 3. The upper end of the outer auxiliary connecting member 3 is pivotally connected to the upper part of the second fixing plate 25. The free end of the first rotating arm 505 of the inner main connecting member 5 is pivotally connected to the upper part of the second fixing plate 25. The free end of the second rotating arm 506 of the inner main connecting member 5 is pivotally connected to the lower end of the inner auxiliary connecting member 6. The upper end of the inner auxiliary connecting member 6 is pivotally connected to the upper part of the first fixing plate 15.

When the second walking pad 2 rotates to the unfolded state relative to the first walking pad 1, the projections of the outer main connecting member 4 and the inner main connecting member 5 along the width direction of the walking pad body are symmetrically arranged about the perpendicular bisector of the line connecting their projections. This arrangement of the folding assembly improves the stability of the first walking pad 1 and the second walking pad 2 when they are folded or unfolded. Furthermore, as shown in FIGS. 10, 11, 12, and 13, the outer main connecting member 4 and the inner main connecting member 5 are pivotally connected at their middles by a fourth pin 10. The lower part of the first fixing plate 15 near the second fixing plate 25 is provided with a C-shaped first positioning groove 155 with an opening facing the corresponding second fixing plate 25, and the lower part of the second fixing plate 25 near the first fixing plate 15 is provided with a C-shaped second positioning groove 255 with an opening facing the corresponding first fixing plate 15. When the second walking pad 2 rotates to the unfolded state relative to the first walking pad 1, the first positioning groove 155 and the second positioning groove 255 are respectively engaged with the fourth pin 10. The fourth pin 10 at the middles of the outer main connecting member 4 and the inner main connecting member 5 makes the rotation of the folding assembly smoother and the structure more stable. Moreover, when the second walking pad 2 is rotated to the fully unfolded state, the first positioning groove 155 on the first fixing plate 15 and the second positioning groove 255 on the second fixing plate 25 are respectively engaged with the fourth pin 10, thereby realizing the positioning of the first walking pad 1 and the second walking pad 2 when unfolded, avoiding the situation of not fully unfolded or over-folded, and improving the convenience of use.

It is understood that the folding assembly including the outer main connecting member 4, the outer auxiliary connecting member 3, the inner main connecting member 5, and the inner auxiliary connecting member 6, the four connecting members rotate at different amplitudes during rotation. To avoid interference between the folding assembly and the rotation of the first frame 11 and the second frame 21, in some embodiments, the first fixing plate 15 protrudes outward from the end of the frame of the first walking pad 1, and the second fixing plate 25 protrudes outward from the end of the frame of the second walking pad 2. A rotation gap is formed between the end of the frame of the first walking pad 1 and the end of the frame of the second walking pad 2 for accommodating the rotation movement of each folding assembly. This rotation gap ensures that when the second walking pad 2 rotates relative to the first walking pad 1, it will not interfere with the rotation of the connecting members of each folding assembly, making the folding operation simpler and more convenient.

It is understood that when the second walking pad 2 is rotated to the folded state relative to the first walking pad 1, at least a portion of one folding assembly faces upwards. To prevent other objects from entering the folding assembly and to improve the esthetics of the walking pad in the folded state, in some embodiments, as shown in FIG. 4, a first cover 16, which is configured to cover an outside of the first fixing plate 15, is connected to the end of the frame of the first walking pad 1, and a second cover 26, which is configured to cover an outside of the second fixing plate 25, is connected to the end of the frame of the second walking pad 2. The first cover 16 and the second cover 26 can shield and protect the folding assembly, providing high safety. In addition, the specific structural arrangements of the folding assembly, the first cover 16 and the second cover 26 in this embodiment are set as above so that when the foldable walking pad is being rotated to the folded state, at least a part of each folding assembly will protrude towards the bottoms of the first walking pad 1 and the second walking pad 2, rather than protruding from the top of the first walking pad 1 and the second walking pad 2, ensuring the integrity of the top surfaces of the first walking pad 1 and the second walking pad 2 and increasing the esthetics of the product's surface. Furthermore, both the first cover 16 and the second cover 26 are dome-shaped, so that the dome-shaped parts of the first cover 16 and the second cover 26 can accommodate the protruding parts of the folding assemblies during their rotation movements.

In some embodiments, as shown in FIGS. 14, 15, 16, 17, 18 and 19, the folding assembly may also be implemented in the following implementations.

Specifically, the frame of the first walking pad 1 is the first frame 11, which includes two first longitudinal bars 12 parallel to each other on both sides and multiple parallel crossbars 13 connected to the two first longitudinal bars 12. The first walking pad 14 is connected on the multiple crossbars 13 of the first frame 11. The frame of the second walking pad 2 is the second frame 21, which includes two second longitudinal bars 22 parallel to each other on both sides and multiple parallel crossbars 23 connected to the two second longitudinal bars 22. The walking pad 24 is connected on the multiple crossbars 23 of the second frame 21.

The foldable walking pad includes at least two first fixing plates 15 connected to the end of the first frame 11, and at least two second fixing plates 25 connected to the end of the second frame 21.

It is easy to understand that one folding assembly is disposed on one first fixing plate 15 and one corresponding second fixing plate 25. The “corresponding” is also easy to understand: it means that one folding assembly is disposed on one first fixing plate 15 and one second fixing plate 25 that are arranged opposite. Generally, a walking pad has two folding assemblies on its both sides. Therefore, there are two first fixing plates 15 and two second fixing plates 25. In some implementations, three or more folding assemblies may be arranged between two adjacent walking pads of a foldable walking pad, thus making the foldable walking pad include the fixing plates of corresponding number. In some implementations, a foldable walking pad may include three or more walking pads, thus making the foldable walking pad include the fixing plates of corresponding number.

Each folding assembly includes, from the outside in, an outer auxiliary connecting member 3, an outer main connecting member 4, an inner main connecting member 5, and an inner auxiliary connecting member 6. The outer main connecting member 4 is pivotally connected to the inner main connecting member 5. The outer main connecting member 4 is pivotally connected to the first fixing plate 15 via the outer auxiliary connecting member 3. The outer main connecting member 4 is pivotally connected to the second fixing member 25. The inner main connecting member 5 is pivotally connected to the first fixing plate 15. The inner main connecting member 5 is pivotally connected to the second fixing plate 25 via the inner auxiliary connecting member 6. All pivotal connections are pin-to-pin hole connection, and at least one of every two connecting members that are pivotally connected can rotate relative to the pin. It is easy to understand that, as shown in FIG. 14, the folding assemblies on both sides are structurally identical and symmetrically arranged.

With the above arrangements, the folding assemblies of the walking pad of the present application have the following advantages. Because each folding assembly includes the inner and outer main connecting members and the inner and outer auxiliary connecting members that are pivotally connected to their corresponding fixing plates on the first and second walking pads. All pivotal connections are pin-to-pin hole connections, at least one of every two elements that are pivotally connected can rotate relative to the pin, replacing the sliding connection of the sliding rod and the sliding groove or sliding through hole. This results in high cooperation precision, maintaining good fit and levelness between the end faces of the first and second walking pads after unfolding, and essentially eliminating the shaking caused by sliding grooves. Furthermore, with the above arrangements, the elements of the folding assembly may be made of ordinary carbon steel, thereby relatively reducing material and processing costs. And throughout the assembly process of the entire folding assembly, only coaxial pin-to-pin hole connections are needed, making the assembly process relatively simple, convenient, and quick.

The first fixing plates 15 are connected to the end of the first frame 11, as shown in FIG. 14, by welding the first fixing plates 15 to the end of the frame of the first walking pad 1. Specifically, the first fixing plates 15 may be respectively connected to the end of the two first longitudinal bars 12. The second fixing plates 25 are connected to the end of the second frame 21, as shown in FIG. 14, by welding the second fixing plates 25 to the end of the frame of the second walking pad 2. Specifically, the second fixing plates 25 may be respectively connected to the end of the two second longitudinal bars 22. It is easy to understand that the ends mentioned here refer to the adjacent ends of the first walking pad 1 and the second walking pad 2. In other words, the ends mentioned here refer to the adjacent ends of the first longitudinal bars 12 and the corresponding second longitudinal bars 22 in FIG. 14. In addition, the first fixing plate may also be connected to the first crossbar at the end of an adjacent first frame, and the second fixing plate may also be connected to the second crossbar at the adjacent end of the second frame. With the above structures, the assembly process is simpler, more convenient and faster.

As shown in FIGS. 14, 15, and 16, when the foldable walking pad is placed horizontally in its unfolded state, the structures of the folding assembly are set as follows.

A first outer pin hole 31 at an upper part of the outer auxiliary connecting member 3 is pivotally connected to a first inner pin hole 41 at one end of an upper part of the outer main connecting member 4 via a first pin 7. A second outer pin hole 32 at a lower part of the outer auxiliary connecting member 3 is pivotally connected to a second inner pin hole 151 at a lower part of the first fixing plate 15 away from the second fixing plate 25 via a second pin 8. A third outer pin hole 42 at an other end of the upper part of the outer main connecting member 4 is pivotally connected to a third inner pin hole 251 at an upper part of the second fixing plate 25 near the first fixing plate 15 via a third pin 9. A fourth outer pin hole 43 at a lower part of the outer main connecting member 4 is pivotally connected to a fourth inner pin hole 51 at a lower part of the inner main connecting member 5 via a fourth pin 10. A fifth inner pin hole 52 at one end of an upper part of the inner main connecting member 5 is pivotally connected to a fifth outer pin hole 152 at an upper part of the first fixing plate 15 near the second fixing plate 25 via a fifth pin 110. A sixth inner pin hole 61 at a lower part of the inner auxiliary connecting member 6 is pivotally connected to a sixth outer pin hole 252 at a lower part of the second fixing plate 25 away from the first fixing plate 15 via a sixth pin 120. A seventh inner pin hole 62 at an upper part of the inner auxiliary connecting member 6 is pivotally connected to a seventh outer pin hole 53 at an other end of the inner main connecting member 5 via a seventh pin 130.

Lower parts of adjacent ends of the first fixing plate 15 and the second fixing plate 25 are both cut off to form a space for accommodating the fourth pin 10. A lower part of one end of the outer main connecting member 4 away from the inner main connecting member 5 is cut off to form a space for accommodating the second pin 8. A lower part of an end of the inner main connecting member 5 away from the outer main connecting member 4 is cut off to form a space for accommodating the sixth pin 120. By adopting the above pivotal connections, the high cooperation accuracy is further ensured, maintaining good fit and levelness of the end faces of the first and second walking plates after unfolding, essentially eliminating the shaking phenomenon caused by gaps, and relatively reducing costs. The assembly process is simple, convenient, and quick.

Inclined edges are formed by cutting off both the lower parts of adjacent ends of the first fixing plate 15 and the second fixing plate 25. The space for accommodating the fourth pin 10, which is formed by the inclined edges, makes a distance between the first fixing plate 15 and the second fixing plate 25 in the unfolded state of the foldable walking pad gradually increase from top to bottom. Specifically, the inclined edge of the first fixing plate 15 is set as an inclined edge that is higher at the top and lower at the bottom, namely the first inclined edge 153; and the inclined edge of the second fixing plate 25 is set as an inclined edge that is higher at the top and lower at the bottom, namely the second inclined edge 253. Curved corners are formed at junctions between the inclined edges and corresponding top edges of the first fixing plate 15 and the second fixing plate 25. Specifically, the curved corner is formed between the first inclined edge 153 and the first top edge 154, and the curved corner is also formed between the second inclined edge 253 and the second top edge 254. The outer main connecting member 4 is a triangle with all its three angles formed as arc curved corners; the inner main connecting member 5 is a triangle with all its three angles formed as arc curved corners. With the above structures, interference between all elements is completely avoided, further eliminating shaking and noise during the folding and unfolding of the first and second walking pads, ensuring flexibility, smoothness, stability, and reliability.

A first small-diameter rod 711 of a first step rod 71 of the first pin 7 is accommodated in and secured to the first inner pin hole 41 of the outer main connecting member 4, for example by welding. A first screw passes through the first outer pin hole 31 of the outer auxiliary connecting member 3 and is screwed into a first threaded hole 712 of the first step rod 71. The first outer pin hole 31 of the outer auxiliary connecting member 3 is rotatably engaged with a first large-diameter rod 713 of the first step rod 71. A first inner washer 73 may sleeve over the first small-diameter rod 711 of the first step rod 71. The first inner washer 73 is located between the outer main connecting member 4 and the first large-diameter rod 713 of the first step rod 71. A first outer washer 74 may sleeve over the first large-diameter pin 713 of the first step pin 71. Specifically, two first outer washers 74 may be located between the large head of the first screw 72 and the outer auxiliary connecting member 3. The seventh pin 130 has a same structure as the first pin 7 and is symmetrically arranged. A seventh small-diameter rod 1311 of a seventh step rod 131 of the seventh pin 130 is accommodated in and secured to the seventh outer pin hole 53 of the inner main connecting member 5, for example by welding. A seventh screw 132 passes through the seventh inner pin hole 62 of the inner auxiliary connecting member 6 and is screwed into a seventh threaded hole of the seventh step rod 131. The seventh inner pin hole 62 of the inner auxiliary connecting member 6 and the seventh large-diameter rod 1312 of the seventh step rod 131 are in rotational cooperation. A seventh outer washer 133 may sleeve over the seventh small-diameter rod 1311 of the seventh step rod 131. The seventh outer washer 133 is located between the inner main connecting member 5 and the seventh large-diameter rod 1312 of the seventh step rod 131. A seventh inner washer 134 may sleeve over the seventh large-diameter rod 1312 of the seventh step rod 131. Specifically, two seventh inner washers 134 are located between the large head of the seventh screw 132 and the inner auxiliary connecting member 6. With the above structures, the specific structure and mutual cooperation of the first pin shaft and the first pin hole, as well as the specific structure and mutual cooperation of the seventh pin and the seventh pin hole, further ensure that the foldable walking pad maintains good fit and good levelness of the end faces of the first and second walking plates after unfolding, basically eliminates the shaking phenomenon caused by gaps, and relatively reduces costs. Its assembly process is simple, convenient, and quick.

A second small-diameter rod 811 of a second step rod 81 of the second pin 8 is accommodated in and secured to the second inner pin hole 151 of the first fixing plate 15, for example by welding. A second screw 82 passes through the second outer pin hole 32 of the outer auxiliary connecting member 3 and is screwed into a second threaded hole 814 of the second step rod 81. A second large-diameter rod 812 of the second step rod 81 serves as an axially spaced section. The second outer pin hole 32 of the outer auxiliary connecting member 3 is rotatably engaged with a second middle-diameter rod 813 of the second step rod 81. The second screw 82 is screwed into the second threaded hole 814 of the second step rod 81. A second inner washer 83 may sleeve over the second middle-diameter rod 813 of the second step rod 81. A section of the second middle-diameter rod 813 of the second step rod 81 extends beyond the outer auxiliary connecting member 3, and a second outer washer 84 may sleeve over this section. Specifically, two second outer washers 84 are located between the large head of the second screw 82 and the outer auxiliary connecting member 3. It is easy to understand that the length of the axially spaced section plus the thickness of the second inner washer 83 is equal to the distance between the outer auxiliary connecting member 3 and the first fixing plate 15.

The sixth pin 120 has a same structure as the second pin 8 and is symmetrically arranged. A sixth small-diameter rod 1211 of a sixth step rod 121 of the sixth pin 12 is accommodated in and secured to a sixth outer pin hole 252 of the second fixing plate 25, for example by welding. A sixth large-diameter rod 1212 of the sixth step rod 121 is an axially spaced section. The sixth inner pin hole 61 of the inner auxiliary connecting member 6 is rotatably engaged with a sixth middle-diameter rod 1213 of the sixth step rod 121. A sixth screw 122 is screwed into a sixth threaded hole of the sixth step rod 121. A sixth outer washer may sleeve over the sixth middle-diameter rod 1213 of the sixth step rod 121. A section of the sixth middle-diameter rod 1213 of the sixth step rod 121 extends beyond the inner auxiliary connecting member 6, and a sixth inner washer 123 can sleeve over this section. Two sixth inner washers 123 are located between the large head of the sixth screw 122 and the inner auxiliary connecting member 6. It is easy to understand that the length of the axially spaced section plus the thickness of the sixth outer washer is equal to the distance between the inner auxiliary connecting member 6 and the second fixing plate 25. With the above structures, the specific structure and mutual cooperation of the second pin and the second pin hole, as well as the specific structure and mutual cooperation of the sixth pin and the sixth pin hole, further ensure that the foldable walking pad maintains good fit and good levelness of the end faces of the first and second walking plates after unfolding, basically eliminates the shaking phenomenon caused by the gaps, and relatively reduces costs. Its assembly process is simple, convenient, and quick.

A third large-diameter rod 913 of a third step rod 91 of the third pin 9 is an axial limiting rod. A rear section of a third small-diameter rod 911 of the third step rod 91 is accommodated in and secured to the third inner pin hole 251 of the second fixing plate 25, for example by welding. The third outer pin hole 42 of the outer main connecting member 4 is rotatably engaged with a part of the third small-diameter rod 911 of the third step rod 91 that extends out of the second fixing plate 25, and a third screw 92 passes through the third outer pin hole 42 of the outer main connecting member 4 and is screwed into a third threaded hole 912 of the third step rod 91. A third inner washer 93 may sleeve over the third small-diameter rod 911 of the third step rod 91 and is located between the second fixing plate 25 and the outer main connecting member 4. A section of the third small-diameter rod 911 of the third step rod 91 extends out of the outer main connecting member 4, and a third outer washer 94 may sleeve over this section. Specifically, two third outer washers 94 are located between the large head of the third screw 92 and the outer main connecting member 4.

The fifth pin 110 has a same structure as the third pin 9 and is symmetrically arranged. A fifth large-diameter rod 1112 of a fifth step rod 111 of the fifth pin 110 is an axial limiting pin. A rear section of a fifth small-diameter rod 1111 of the fifth step rod 111 is accommodated in and secured to the fifth outer pin hole 152 of the first fixing plate 15, for example by welding. The fifth inner pin hole 52 of the inner main connecting member 5 is rotatably engaged with a part of the fifth small-diameter rod 1111 of the fifth step rod 111 that extends out of the first fixing plate 15. A fifth screw 112 passes through the fifth inner pin hole 52 of the inner main connecting member 5 and is screwed into a fifth threaded hole of the fifth step rod 111. A fifth outer washer 113 may sleeve over the fifth small-diameter rod 1111 of the fifth step rod 111, located between the first fixing plate 15 and the inner main connecting member 5; the fifth small-diameter rod 1111 of the fifth step rod 111 can extend a section beyond the inner main connecting member 5, and two fifth inner washers 114 can be fitted onto the extended section. The two fifth inner washers 114 are located between the large head of the fifth screw 112 and the inner main connecting member 5. With the above structures, the specific structure and mutual cooperation of the third pin and the third pin hole, as well as the specific structure and mutual cooperation of the fifth pin and the fifth pin hole, further ensure that the foldable walking pad maintains good fit and good levelness of the end faces of the first and second walking plates after unfolding, basically eliminates the shaking phenomenon caused by gaps, and relatively reduces costs. Its assembly process is simple, convenient, and quick.

A middle part of a fourth step rod 101 of the fourth pin 10 is a fourth large-diameter rod 1011 which serves as an axially spaced section. A fourth inner small-diameter rod 1012 of the fourth step rod 101 is rotatably engaged with the fourth inner pin hole 51 of the inner main connecting member 5. A fourth inner screw 102 is screwed into a fourth inner thread hole of the fourth step rod 101. The axially spaced section is located between the outer main connecting member 4 and the inner main connecting member 5, thus separating them by the distance of the fourth large-diameter rod 1011. A fourth outer small-diameter rod 1014 of the fourth step rod 101 is rotatably engaged with the fourth outer pin hole 43 of the outer main connecting member 4. A fourth outer screw 103 is screwed into a fourth outer thread hole 1013 of the fourth step rod 101. A fourth inner washer 104 may sleeve over the fourth inner small-diameter rod 1012 of the fourth step rod 101, located between the large head of the fourth inner screw 102 and the inner main connecting member 5. A section of the fourth outer small-diameter rod 1014 of the fourth step rod 101 extends beyond the outer main connecting member 4. A fourth outer washer 105 may sleeve over the section. Specifically, two fourth outer washers 105 are located between the large head of the fourth outer screw 103 and the outer main connecting member 4. With the above structures, the specific structure and mutual cooperation of the fourth pin and the fourth pin hole further ensure that the foldable walking pad maintains good fit and good levelness of the end faces of the first and second travel plates after unfolding, basically eliminates the shaking phenomenon caused by gaps, and relatively reduces costs. Its assembly process is simple, convenient, and quick.

In the description of the embodiments of the present application, it should be noted that in the description of the present application, terms such as “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

In the description of the present application, the description with reference to the terms “one embodiment”, “some embodiments”, “in one implementation”, “for example”, or “some implementations” means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.