A stairway

Abstract

The present application relates to the technical field of climbing equipment, and discloses a step ladder, which comprises at least one step ladder single structure, the step ladder single structure comprises an inner base body, an outer sliding sleeve and a plurality of foot pedals, the outer sliding sleeve is sleeved on the outer side of the inner base body; a guide limiting groove is formed in the side wall of the inner base body corresponding to each foot pedal, and a driving groove is formed in the outer sliding sleeve corresponding to each foot pedal, one end of the foot pedal is rotatably connected to the inner base body through the driving groove and the guide limiting groove, the outer sliding sleeve slides relative to the inner base body and drives the foot pedal to overturn through the driving groove, and the foot pedal is supported on the supporting part of the guide limiting groove when it is unfolded outward. When the step ladder is needed, the outer sliding sleeve is made to slide downward relative to the inner base body, the foot pedal is driven to overturn and unfold outward by means of the driving groove, the foot pedal is supported on the supporting part of the guide limiting groove after being unfolded, the supporting part bears the foot pedal and the human body load, the structural stability and the use safety during the stepping operation are improved, the overall structure is compact, and the step ladder is convenient to carry and transport.

Description

Technical Field

[0001] This invention relates to the field of climbing equipment technology, specifically to a ladder. Background Technology

[0002] Ladders are climbing structures used by personnel to ascend to higher positions, and are widely used in various scenarios such as equipment maintenance and outdoor work. Traditional ladders have a fixed structure, cannot be folded, take up a lot of space, and are difficult to move and carry, so they are now rarely used.

[0003] To improve portability, various types of folding ladders have emerged. While some folding ladders are capable of folding, their overall size remains relatively large after folding, limiting their portability, such as the folding ladder disclosed in patent CN103216190. Another type of ladder uses a vertical flip-down foot pedal storage solution. This type of ladder transmits the movement of the lifting rod to the foot pedal extension section through a connecting plate, driving the foot pedal to rotate around the pivot, thereby unfolding and folding the foot pedal; such as the linkage-type concealed ladder disclosed in patent CN102852453A. This type of ladder has many parts, and the processing and assembly procedures are complex. If a motor is used to drive the unfolding and folding of the foot pedal, it is necessary to add a matching power component and lay out the connecting circuit, increasing the overall weight and manufacturing cost. The circuit components are also prone to failure in complex outdoor environments, making it difficult to meet the actual needs of outdoor carrying and use. Summary of the Invention

[0004] The purpose of this invention is to provide a staircase that at least solves one of the above-mentioned problems, such as making the staircase easy to unfold and convenient to use.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A staircase includes at least one staircase unit structure, which includes an inner base, an outer sliding sleeve, and several foot pedals. The outer sliding sleeve is slidably fitted onto the outside of the inner base. The inner base sidewall has guide and limiting grooves corresponding to each foot pedal, and the outer sliding sleeve has drive grooves corresponding to each foot pedal. One end of each foot pedal passes through the drive groove and the guide and limiting groove and is rotatably connected to the inner base. The outer sliding sleeve slides relative to the inner base and drives the foot pedal to flip through the drive groove. When the foot pedal unfolds outward, it abuts against the support portion of the guide and limiting groove.

[0007] In the above technical solution, when the ladder is needed, the outer sliding sleeve slides downward relative to the inner base, and the drive groove drives the foot pedals to flip outward and unfold. After unfolding, the foot pedals abut against the support part of the guide limiting groove, and the support part bears the foot pedals and the load of the human body stepping on them. After use, the outer sliding sleeve slides upward relative to the inner base, and the drive groove drives the foot pedals to fold inward, reducing the space occupied by the ladder unit. During the foot pedal flipping process, the guide limiting groove guides and constrains the movement of the foot pedals, and together with the support part supporting and limiting the foot pedals, it improves the structural stability and safety of use during stepping operations. The overall structure is compact and easy to carry and transport.

[0008] Preferably, a support block is fixed at the lower end of the guide limiting groove, and the support block constitutes a support part.

[0009] Preferably, each drive slot of the outer sliding sleeve is equipped with a drive block, and the drive block has a clearance opening for the foot pedal to rotate; the free end of the foot pedal is equipped with a protective component, and when the foot pedal is rotated inward and stored in place, the protective component abuts against the drive block.

[0010] Preferably, the drive block has an insertion slot for the protective component to be flipped and inserted.

[0011] Preferably, a buffer block is fixed to the inner sidewall of the outer sliding sleeve, and the buffer block is sandwiched between the outer sliding sleeve and the inner base.

[0012] Preferably, a hand guard is installed on the outer sliding sleeve.

[0013] Preferably, the staircase includes multiple staircase unit structures, with the inner base of adjacent staircase unit structures being rotatably connected end to end; in the stowed state, the multiple staircase unit structures can rotate relative to each other to form the staircase body; in the unfolded state, the multiple staircase unit structures can rotate relative to each other to be arranged in a straight line.

[0014] Preferably, the ends of the staircase body are fitted with end caps.

[0015] Preferably, the staircase also includes a storage bracket; the storage bracket has a storage slot into which the staircase body can be inserted, and limiting members for limiting the staircase body are provided on both sides of the storage slot, and a locking member is provided at the storage opening of the storage slot.

[0016] Preferably, the storage bracket is fixed with a hanging component, and the step ladder body is fixed with a connecting component, which is assembled onto the hanging component. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 for Figure 1 Structural diagram excluding storage bracket;

[0021] Figure 4 This is a breakdown diagram of the staircase unit structure;

[0022] Figure 5 This is a schematic diagram showing the unfolding of the two inner matrix components;

[0023] Figure 6 A schematic diagram showing the hinged joint of the two inner matrix bodies;

[0024] Figure 7 for Figure 3 A diagram showing the folded state;

[0025] Figure 8 for Figure 7 A schematic diagram excluding the plug;

[0026] Figure 9 This is a schematic diagram of the folding of the two inner matrix components;

[0027] Figure 10 A folding diagram showing the hinged joint of the two inner substrates;

[0028] Figure 11 for Figure 1 A folding diagram;

[0029] Figure 12 This is a structural diagram of the storage rack;

[0030] Figure 13 This is a structural schematic diagram of the locking component;

[0031] Figure 14 for Figure 13 The split diagram.

[0032] The components include: inner base 301, outer sliding sleeve 302, foot pedal 303, guide limiting groove 304, drive groove 305, support block 306, drive block 307, protective component 308, insertion groove 309, buffer block 310, hand guard 311, plug 312, storage bracket 313, limiting component 314, locking component 315, suspension component 316, connecting component 317, fixing component 318, ladder pad 319, connecting plate 320, first convex hinge 321, first concave hinge 322, second convex hinge 323, second concave hinge 324, pressure plate 325, buckle 326, card seat 327, pressing limiting part 328, and guide rail 329. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] like Figures 1-14 As shown, the present invention provides a staircase, including at least one staircase unit structure. The staircase unit structure includes an inner base 301, an outer sliding sleeve 302, and a plurality of foot pedals 303. The outer sliding sleeve 302 is slidably sleeved on the outside of the inner base 301. The side wall of the inner base 301 is provided with guide limiting grooves 304 corresponding to each foot pedal 303. The outer sliding sleeve 302 is provided with drive grooves 305 corresponding to each foot pedal 303. One end of the foot pedal 303 passes through the drive groove 305 and the guide limiting groove 304 and is rotatably connected to the inner base 301. The outer sliding sleeve 302 slides relative to the inner base 301 and drives the foot pedal 303 to flip through the drive groove 305. When the foot pedal 303 unfolds outward, it abuts against the support part of the guide limiting groove 304.

[0036] In the above technical solution, when the ladder is needed, the outer sliding sleeve 302 slides downward relative to the inner base 301, and the foot pedal 303 is driven to flip outward and unfold by the drive groove 305. After unfolding, the foot pedal 303 abuts against the support part of the guide limiting groove 304, and the support part bears the foot pedal 303 and the load of the human body stepping on it. After use, the outer sliding sleeve 302 slides upward relative to the inner base 301, and the drive groove 305 drives the foot pedal 303 to fold inward, reducing the space occupied by the ladder unit. During the flipping process of the foot pedal 303, the guide limiting groove 304 guides and constrains the movement stroke of the foot pedal 303. Together with the support part supporting and limiting the foot pedal 303, it improves the structural stability and safety of use during stepping operations. The overall structure is compact and easy to carry and transport.

[0037] It should be noted that, to ensure safety during staircase use, when only one staircase unit is installed, a fixing member 318 is fitted at the upper end of the inner base 301, and a step pad 319 is fitted at the lower end of the outer sliding sleeve 302. When multiple staircase units are installed, in the staircase units arranged in a straight line, a fixing member 318 is fitted at the upper end of the inner base 301 of the uppermost staircase unit, and a step pad 319 is fitted at the lower end of the outer sliding sleeve 302 of the lowermost staircase unit. During installation, the foot pedal 303 can be rotatably connected to the inner base 301 using locking studs and countersunk screws. Both the inner base 301 and the outer sliding sleeve 302 are hollow, reducing the overall weight of the staircase and facilitating the folding and installation of the foot pedal 303.

[0038] It should also be noted that this staircase is mainly used in the following two ways:

[0039] The first method involves using the fixing member 318 on the inner base 301 at the top in the unfolded state to complete the suspension and fixation; when in use, the outer sliding sleeve 302 is pulled down, and the outer sliding sleeve 302 drives the foot pedal 303 to flip and unfold outward. The lower end of the outer sliding sleeve 302 can be in contact with the ground or in a suspended state; the foot pedal 303 abuts against the support to support the stepping load; if the lower end of the outer sliding sleeve 302 is in contact with the ground, the upper end of the drive groove 305 can contact or detach from the foot pedal 303; if the lower end of the outer sliding sleeve 302 is suspended, the upper end of the drive groove 305 contacts the foot pedal 303, thereby achieving the limiting constraint of the outer sliding sleeve 302;

[0040] The second method involves the outer sliding sleeve 302 sliding relative to the inner base 301, causing the foot pedal 303 to unfold outwards. The inner base 301 at the top is then pressed against the external support. The operator steps on the bottom foot pedal 303, alternating between both feet to complete the climbing operation.

[0041] When the foot pedal 303 is in the folded state, the end of the outer sliding sleeve 302 is close to or abuts against the fixing member 318 on the inner base 301.

[0042] Furthermore, a support block 306 is fixed to the lower end of the guide limiting groove 304, forming a support component. After the foot pedal 303 is deployed, the load acts on the support block 306, which can prevent the foot pedal 303 from directly rubbing against and impacting the inner base 301, reducing the wear of the inner base 301. The support block 306 is an independent component, which can be disassembled and replaced separately after wear and damage, without the need to replace the entire inner base 301, thus reducing maintenance costs. Of course, in specific implementations, the lower groove wall of the guide limiting groove 304 itself can be used as the support component.

[0043] Furthermore, each drive slot 305 corresponding to the outer sliding sleeve 302 is equipped with a drive block 307, and the drive block 307 has a clearance opening for the foot pedal 303 to rotate. The free end of the foot pedal 303 is equipped with a protective member 308. When the foot pedal 303 is rotated inward and retracted into place, the protective member 308 abuts against the drive block 307. When the foot pedal 303 is rotated inward and retracted into place, the protective member 308 and the drive block 307 abut against each other. The protective member 308 can be made of rubber, which can seal the assembly gaps and play a role in dustproof and waterproof protection. The drive block 307 can be made of plastic to further reduce the weight of the component.

[0044] Furthermore, the drive block 307 has an insertion groove 309 for the protective component 308 to be flipped and inserted. After being stored, the protective component 308 is accommodated inside the insertion groove 309 and will not protrude outward, making the outer contour of the stair unit structure more regular. The insertion groove 309 covers the protective component 308, which can reduce the entry of external rainwater and dust into the interior through the mating gap, improve the dustproof and waterproof capabilities of the stair unit structure, and also limit the excessive inward flipping of the foot pedal 303, playing an auxiliary limiting role in the storage position of the foot pedal 303. The drive block 307 is connected to the outer sliding sleeve 302 by screws.

[0045] Furthermore, a buffer block 310 is fixed to the inner wall of the outer sliding sleeve 302, and the buffer block 310 is sandwiched between the outer sliding sleeve 302 and the inner base 301. The buffer block 310 can fill the assembly gap between the inner base 301 and the outer sliding sleeve 302, suppressing radial shaking of the outer sliding sleeve 302 relative to the inner base 301; during the reciprocating sliding operation of the outer sliding sleeve 302, the buffer block 310 remains between the two, reducing direct contact friction and impact, effectively reducing shaking noise. The buffer block 310 can be made of rubber, which has good elasticity and wear resistance. Specifically, the buffer block 310 and the drive block 307 can be integrally molded and made of plastic material, with strong structural integrity, fewer assembly steps, and can simultaneously achieve wear resistance, noise reduction, and lightweight effects.

[0046] Furthermore, a hand guard 311 is installed on the outer sliding sleeve 302. When operating the outer sliding sleeve 302 or performing climbing operations, personnel can hold the hand guard 311 for leverage; the openings on the hand guard 311 allow fingers to be inserted for gripping, improving the anti-slip effect when gripping, making it easier for users to push and pull the outer sliding sleeve 302 to complete the unfolding or retracting of the foot pedal 303, improving the operating feel and safety.

[0047] Furthermore, the staircase comprises multiple individual staircase structures, with the inner base 301 of adjacent individual staircase structures rotatably connected end-to-end. In the folded state, the multiple individual staircase structures can rotate relative to each other to form the staircase body; in the unfolded state, the multiple individual staircase structures can rotate relative to each other to form a straight line arrangement. Multiple individual staircase structures are configured according to the actual climbing height requirements. The inner base 301 of adjacent individual staircase structures are rotatably connected end-to-end, and a hinge structure such as a three-fold hinge can be used. This allows the included angle between adjacent individual staircase structures to approach 0° when folded, and the individual staircase structures to be in a straight line when unfolded. In the folded state, the multiple individual staircases can rotate to form a straight line arrangement, significantly reducing the overall storage volume and facilitating transportation and storage. In use, they can be rotated and unfolded to form a complete staircase that meets the climbing height requirements.

[0048] It should be noted that a reinforcing member is fixed inside the outer sliding sleeve 302. During the sliding process of the outer sliding sleeve 302 relative to the inner base 301, the reinforcing member moves synchronously with the outer sliding sleeve 302. When the outer sliding sleeve 302 slides into place and the foot pedal 303 unfolds outward, the reinforcing member is precisely aligned with the connection part of the adjacent inner base 301. This provides structural reinforcement to the hinge connection of the adjacent inner base 301, improves the overall strength of the combined structure of multiple staircase units, and prevents the connection part of the adjacent inner base 301 from bending and deforming when the staircase is subjected to stepping load, thus ensuring the structural stability during use.

[0049] Specifically, when the inner bases 301 of adjacent staircase units are connected to each other, the connection structure includes a first hinge assembly, a second hinge assembly, and a connecting plate 320. The first hinge assembly includes a first convex hinge 321 and a first concave hinge 322 that are hinged to each other, and the second hinge assembly includes a second convex hinge 323 and a second concave hinge 324 that are hinged to each other. The first convex hinge 321 and the second concave hinge 324 are respectively fixed to two adjacent inner bases 301, and the first concave hinge 322 and the second convex hinge 323 are respectively fixedly connected to the connecting plate 320. Relying on the cooperation of the first hinge assembly, the second hinge assembly, and the connecting plate 320, when the adjacent inner bases 301 are in a straight unfolded state, the first hinge assembly, the second hinge assembly, and the connecting plate 320 are arranged on the same side; when the adjacent inner bases 301 are rotated to a side-by-side stowed state, the first hinge assembly and the second hinge assembly are respectively located on both sides of the connecting plate 320 and arranged correspondingly to each other.

[0050] Furthermore, a cap 312 is fitted to the end of the staircase body. The cap 312, fitted to the end of the folded staircase body, restrains and organizes the end of the staircase body, preventing displacement and scattering of individual staircase components. The cap 312 has openings to facilitate the drainage of water that has entered the staircase body, reducing internal water accumulation. The cap 312 can be made of rubber or plastic and can be directly fitted onto the end of the staircase body, providing a certain degree of cushioning and protection. Of course, in practice, the cap 312 can also be made of other materials, and threaded holes can be pre-set on the staircase body, using bolts to lock the cap 312 to the end of the staircase body. Multiple assembly methods can adapt to different processing and usage requirements. A cap 312 is installed at one end of the folded staircase body, and a fastener 318 and a step pad 319 are located at the other end of the staircase body to avoid interference with the cap 312. Therefore, the single staircase structure can be used alone. When multiple staircases are used, it is preferable that the number is even, such as two or four.

[0051] Furthermore, the staircase also includes a storage bracket 313; the storage bracket 313 has a storage slot into which the staircase body can be inserted, and limiting members 314 for limiting the staircase body are provided on both sides of the storage slot, and a locking member 315 is provided at the storage opening of the storage slot. After the staircase is folded to form the staircase body, it can be placed entirely into the storage slot of the storage bracket 313; the limiting members 314 on both sides of the storage slot can be corner brackets or L-shaped members, which constrain the staircase body from the side, limiting the lateral displacement of the staircase body and the displacement away from the storage opening; the locking member 315 at the storage opening can lock the staircase body in the storage slot to prevent accidental dislodgement; the storage bracket 313 can be made of bent parts welded together, and a support is fixed on the storage bracket 313, and the storage bracket 313 can be fixed to the target installation position through the mounting holes on the support.

[0052] Specifically, the locking element 315 at the storage opening adopts a combination structure of pressure plate 325, buckle 326, and bracket 327. Pressure plate 325 is rotatably mounted on one side of the storage opening of storage bracket 313. Buckle 326 is fixedly installed on the free end of pressure plate 325, and bracket 327 is fixedly installed on the other side of storage opening of storage bracket 313. When the ladder body is completely inserted into the storage slot, rotating pressure plate 325 causes buckle 326 and bracket 327 to engage with each other, thereby locking the ladder body in the storage slot and preventing the ladder body from accidentally coming out of the storage opening. When unlocking, buckle 326 is disengaged from bracket 327, and rotating pressure plate 325 can open the storage opening for easy removal of the ladder body.

[0053] Specifically, the pressure plate 325 bends and protrudes towards the storage opening on one side to form a pressing and limiting part 328. When the buckle 326 engages with the card seat 327, the protruding part of the pressure plate 325 presses tightly against the outside of the stair body, further pressing and limiting the stair body in the storage slot, restricting the stair body from shaking or moving in the storage slot, making the storage and locking state more stable and reliable.

[0054] Furthermore, the storage bracket 313 is fixed with a suspension member 316, and the stair body is fixed with a connecting member 317, which is assembled onto the suspension member 316. The suspension member 316 on the storage bracket 313 is rotatably connected to the connecting member 317 on the stair body, realizing the assembly between the stair body and the storage bracket 313, making them an assembled whole; specifically, the connecting member 317 is fixedly set on the fixing member 318 of the inner base 301. To facilitate assembly and swing guidance, the suspension member 316 is made of a bent part, with a bending angle set to 100°-150°, preferably 120°; one end of the bent part is fixedly connected to the storage bracket 313, and the other end is rotatably connected to the connecting member 317. The bending configuration adapts to the movement angle requirements of the stair body's swing and storage, ensuring smooth and interference-free swing and storage process of the stair body.

[0055] Furthermore, the suspension component 316 is a bent component, and its bending angle can limit the tilt angle of the staircase. The suspension component 316 is provided with a guide rail 329, which is L-shaped. A pin or bolt passes through the guide rail 329 to connect the suspension component 316 and the connector 317, realizing the hinged assembly between the suspension component 316 and the connector 317. The pin or bolt can slide inside the guide rail 329 and can also rotate relative to it. During the storage operation, the staircase body is first moved towards the storage bracket 313, which drives the pin or bolt to move to the end of the guide rail 329 near the storage bracket 313. Then, the staircase body is rotated to make it turn into the storage slot. Then, the staircase body is pushed, and the pin or bolt slides along the guide rail 329 towards the limiting component 314 until the staircase body abuts against the limiting component 314 to complete the positioning. Finally, the storage opening is sealed by the locking component 315. The entire storage process relies on guide rail 329 to constrain the movement trajectory of the stair body, guiding the stair body to accurately fall into the storage slot and be positioned, ensuring stable and reliable assembly and storage.

[0056] Taking a single step structure with two rotating ends connected as an example, its unfolding and folding processes are as follows:

[0057] Usage Procedure: In the initial state, the two individual stair units are placed side-by-side to form the stair body. One end of the stair body is hinged to the suspension member 316, and the entire structure is contained within the storage slot of the storage bracket 313, locked in place by the locking member 315 at the storage opening. In use, first release the locking member 315 and pull the stair body outwards to move it entirely out of the storage slot. Then, rotate the two individual stair units to change from their side-by-side, contained state to a linear, unfolded state, combining to form a complete extended staircase. Next, the outer sliding sleeve 302 is positioned relative to the inner base 301. As the outer sliding sleeve 302 slides downwards, it drives the foot pedal 303 to flip outwards and unfold during the movement, thanks to the cooperation of the drive groove 305 and the guide limiting groove 304. After the foot pedal 303 is fully unfolded, it abuts against the support block 306 of the guide limiting groove 304, and the support block 306 bears the stepping load on the foot pedal 303, ensuring reliable support for the foot pedal 303. After the outer sliding sleeve 302 slides into place, it aligns and covers the hinge connection of the adjacent inner base 301, and provides structural reinforcement to the hinge position to prevent bending and deformation of the hinge position when climbing. The operator can then step on the foot pedal 303 to carry out climbing operations.

[0058] Folding and storage process: After climbing and using the ladder, the person leaves the ladder and operates the outer sliding sleeve 302 to slide upward relative to the inner base 301. Through the drive groove 305, the foot pedal 303 is driven to flip inward and fold up, completing the folding and resetting of the foot pedal 303. Then, the two ladder unit structures that are unfolded in a straight line are rotated in the opposite direction to restore them to a parallel and close-fitting state, and are folded up again into the ladder body. Next, the ladder body is moved and rotated so that the ladder body is turned into the storage groove. The ladder body is pushed until it abuts against the limiting member 314. Finally, the locking member 315 closes and locks the storage opening, constraining and fixing the ladder body in the storage groove, completing the entire folding and storage process.

[0059] In practical use, the storage bracket 313 can be fixedly installed on the roof of the car through the mounting holes on the bracket, and used in conjunction with the roof tent; the ladder body is hinged to the storage bracket 313 by means of the suspension 316. After the ladder is unfolded, the operator can climb by stepping on the foot pedal 303, which makes it convenient for people to enter and exit the roof tent. When not in use, the ladder body can be folded and locked in the storage slot of the storage bracket 313, without taking up extra space in the car, and the overall layout is compact.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A staircase, characterized in that, It includes at least one staircase unit structure, the staircase unit structure includes an inner base (301), an outer sliding sleeve (302) and several foot pedals (303), the outer sliding sleeve (302) is slidably disposed on the outside of the inner base (301); The inner base (301) sidewall is provided with guide limiting grooves (304) corresponding to each foot pedal (303), and the outer sliding sleeve (302) is provided with drive grooves (305) corresponding to each foot pedal (303). One end of the foot pedal (303) passes through the drive groove (305) and the guide limiting groove (304) and is rotatably connected to the inner base (301). The outer sliding sleeve (302) slides relative to the inner base (301) and drives the foot pedal (303) to flip through the drive groove (305). When the foot pedal (303) unfolds outward, it abuts against the support part of the guide limiting groove (304).

2. The staircase according to claim 1, characterized in that, A support block (306) is fixed at the lower end of the guide limiting groove (304), and the support block (306) constitutes a support part.

3. The staircase according to claim 1 or 2, characterized in that, The outer sliding sleeve (302) is equipped with a drive block (307) corresponding to each drive slot (305). The drive block (307) has a clearance opening for the foot pedal (303) to rotate. The free end of the foot pedal (303) is equipped with a protective part (308). When the foot pedal (303) is rotated inward and stored in place, the protective part (308) abuts against the drive block (307).

4. The staircase according to claim 3, characterized in that, The drive block (307) has an insertion slot (309) into which the protective component (308) can be flipped and inserted.

5. The staircase according to claim 1, 2, or 4, characterized in that, A buffer block (310) is fixed on the inner wall of the outer sliding sleeve (302), and the buffer block (310) is sandwiched between the outer sliding sleeve (302) and the inner base (301).

6. The staircase according to claim 1, 2, or 4, characterized in that, A hand guard (311) is installed on the outer sliding sleeve (302).

7. The staircase according to claim 1, 2, or 4, characterized in that, The staircase includes multiple staircase unit structures, with the inner base (301) of adjacent staircase unit structures being rotatably connected end to end; in the stowed state, the multiple staircase unit structures can rotate relative to each other to form the staircase body; in the unfolded state, the multiple staircase unit structures can rotate relative to each other to be arranged in a straight line.

8. The staircase according to claim 7, characterized in that, The ends of the staircase body are fitted with end caps (312).

9. The staircase according to claim 7, characterized in that, The staircase also includes a storage rack (313). The storage bracket (313) has a storage slot into which the stair body can be inserted. Limiting members (314) for limiting the stair body are provided on both sides of the storage slot. Locking members (315) are provided at the storage opening of the storage slot.

10. The staircase according to claim 8, characterized in that, The storage bracket (313) is fixed with a hanging part (316), and the step ladder body is fixed with a connector (317). The connector (317) is assembled on the hanging part (316).

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